Toshiba MMU-AP0121MH, MMU-AP0071MH, MMU-AP0181MH, MMU-AP0091MH, MMU-AP0151MH User Manual

Page 1

FILE NO. A06-002

SERVICE MANUAL

MMU-AP0071MH MMU-AP0091MH MMU-AP0121MH MMU-AP0151MH MMU-AP0181MH

• This Service Manual describes contents of the Compact 4-Way Air Discharge Cassette indoor unit. For the outdoor unit, refer to the Manual with FILE No. A03-009, A05-004, A05-015.

PRINTED IN JAPAN, Apr., 2006 ToMo

Page 2

CONTENTS

SAFETY CAUTION ............................................................................................ 3

1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ........................................ 8

2. WIRING DIAGRAM..................................................................................... 9

3. PARTS RATING........................................................................................ 10

4. REFRIGERATING CYCLE DIAGRAM...................................................... 34

5. CONTROL OUTLINE................................................................................ 35

6. APPLIED CONTROL ................................................................................ 39

7. TROUBLESHOOTING.............................................................................. 44

8. CONFIGURATION OF CONTROL CIRCUIT ............................................ 94

9. DETACHMENTS ....................................................................................... 99

10. P.C. BOARD EXCHANGE PROCEDURES ............................................ 108

11. EXPLODED VIEWS AND PARTS LIST .................................................. 113

Page 3

SAFETY CAUTION

The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents,

and keep them.

WARNING

Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of the main unit, otherwise an electric shock is caused when a leak occurs.

Check earth wires.

Prohibition of modification.

Use specified parts.

Do not bring a child

close to the equipment.

Insulating measures

No fire

If the earth wire is not correctly connected, contact an electric engineer for rework.

Do not modify the products.

Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.

For spare parts, use those specified (

If unspecified parts are used, a fire or electric shock may be caused. ∗: For details, refer to the parts list.

Before troubleshooting or repair work, do not bring a third party (a child, etc.) except the repair engineers close to the equipment.

It causes an injury with tools or disassembled parts. Please inform the users so that the third party (a child, etc.) does not approach the equipment.

Connect the cut-off lead cables with crimp contact, etc, put the closed end side upward and then apply a water-cut method, otherwise a leak or production of fire is caused at the users’ side.

When repairing the refrigerating cycle, take the following measures.

1) Be attentive to fire around the cycle. When using a gas stove, etc, be sure to put out fire before work; otherwise the oil mixed with refrigerant gas may catch fire.

2) Do not use a welder in the closed room. When using it without ventilation, carbon monoxide poisoning may be caused.

3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder may catch the inflammables.

∗∗

∗).

∗∗

Refrigerant

Check the used refrigerant name and use tools and materials of the parts which match with it.

For the products which use R410A refrigerant, the refrigerant name is indicated at a position on the outdoor unit where is easy to see. To prevent miss-charging, the route of the service port is changed from one of the former R22.

For an air conditioner which uses R410A, never use other refrigerant than R410A. For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.

If different types of refrigerant are mixed, abnormal high pressure generates in the refrigerating cycle and an injury due to breakage may be caused.

Do not charge refrigerant additionally.

If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes resulted in change of air conditioner characteristics or refrigerant over the specified standard amount is charged and an abnormal high pressure is applied to the inside of the refrigerating cycle resulted in cause of breakage or injury. Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming, and then newly recharge the specified amount of liquid refrigerant. In this time, never charge the refrigerant over the specified amount.

When recharging the refrigerant in the refrigerating cycle, do not mix the refrig erant or air other than R410A into the specified refrigerant.

If air or others is mixed with the refrigerant, abnormal high pressure generates in the refrigerating cycle resulted in cause of injury due to breakage.

After installation work, check the refrigerant gas does not leak.

If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.

Never recover the refrigerant into the outdoor unit.

When the equipment is moved or repaired, be sure to recover the refrigerant with recovering device. The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as breakage or injury is caused.

Page 4

Assembly/Cabling

Insulator check

Ventilation

Be attentive to

electric shock

Compulsion

WARNING

After repair work, surely assemble the disassembled parts, and connect and lead the removed cables as before. Perform the work so that the cabinet or panel does not catch the inner cables.

If incorrect assembly or incorrect cable connection was done, a disaster such as a leak or fire is caused at user’s side.

After the work has finished, be sure to use an insulation tester set (500V mugger) to check the resistance is 2MW or more between the charge section and the non-charg e metal section (Earth position).

If the resistance value is low, a disaster such as a leak or electric shock is caused at user’s side.

When the refrigerant gas leaks during work, execute ventilation.

If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the refrigerant and the closed room full with gas is dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.

When checking the circuit inevitably under condition of the power-ON, use rubber gloves and others not to touch to the charging section.

If touching to the charging section, an electric shock may be caused.

When the refrigerant gas leaks, find up the leaked position and repair it surely.

If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the service valve, otherwise the refrigerant gas may leak into the room. The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.

When installing equipment which includes a large amount of charged refrigerant such as a multi air conditioner in a sub-room, it is necessary that the density does not the limit even if the refrigerant leaks.

If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.

For the installation/moving/reinstallation work, follow to the Installation Manual.

If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused.

Check after rerair

Check after reinstallation

Put on gloves

Cooling check

After repair work has finished, check there is no trouble.

If check is not executed, a fire, electric shock or injury may be caused. For a check, turn off the power breaker.

After repair work (installation of front panel and cabinet) has finished, execute a test run to check there is no generation of smoke or abnormal sound.

If check is not executed, a fire or an electric shock is caused. Before test run, install the front panel and cabinet.

Check the following items after reinstallation.

1) The earth wire is correctly connected.

2) The power cord is not caught in the product.

3) There is no inclination or unsteadiness and the installation is stable. If check is not executed, a fire, an electric shock or an injury is caused.

CAUTION

Be sure to put on gloves (

If not putting on gloves, an injury may be caused with the parts, etc. (∗) Heavy gloves such as work gloves

When the power was turned on, start to work after the equipment has been sufficiently cooled.

As temperature of the compressor pipes and others became high due to cooling/heating operation, a burn may be caused.

∗∗

∗) during repair work.

∗∗

Page 5

• New Refrigerant (R410A)

This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer.

1. Safety Caution Concerned to New Refrigerant

The pressure of R410A is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed. Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the refrigerating cycle of the air conditioner with new refrigerant during installation work or service work. If an incorrect work or incorrect service is performed, there is a possibility to cause a serious accident. Use the tools and materials exclusive to R410A to purpose a safe work.

2. Cautions on Installation/Service

(1) Do not mix the other refrigerant or refrigerating oil.

For the tools e xclusive to R410A, shapes of all the joints including the service port differ from those of the former refrigerant in order to prev ent mixture of them.

(2) As the use pressure of the new refrigerant is high, use material thickness of the pipe and tools which are

specified for R410A.

(3) In the installation time, use clean pipe materials and work with great attention so that water and others do

not mix in because pipes are affected by impurities such as water, oxide scales, oil, etc. Use the clean pipes.

Be sure to brazing with flowing nitrogen gas. (Never use gas other than nitrogen gas.) (4) For the earth protection, use a vacuum pump for air purge. (5) R410A refrigerant is azeotropic mixture type refrigerant. Therefore use liquid type to charge the refrigerant.

(If using gas for charging, composition of the refrigerant changes and then characteristics of the air condi-

tioner change.)

3. Pipe Materials

For the refrigerant pipes, copper pipe and joints are mainly used. It is necessary to select the most appropriate pipes to conform to the standard. Use clean material in which impurities adhere inside of pipe or joint to a minimum.

(1) Copper pipe

The pipe thickness, flare finishing size , flare nut and others differ according to a refrigerant type. When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe without

seam” and one with bonded oil amount 40mg/10m or less . Also do not use crushed, deformed, discolored (especially inside) pipes. (Impurities cause clogging of expansion valves and capillary tubes.)

Use the flare nuts which are attached to the air conditioner unit.

(2) Joint

The flare joint and socket joint are used for joints of the copper pipe.

The joints are rarely used for installation of the air conditioner. However clear impurities when using them.

Page 6

4. Tools

(1) Required Tools for R410A

Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary , etc.

Accordingly, the tools to be used are classified into the following three types.

1) Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))

2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)

3) Tools commonly used for R410A and for conventional refrigerant (R22)

The table below shows the tools exclusive for R410A and their interchangeability.

Tools exclusive for R410A (The following tools for R410A are required.)

Tools whose specifications are changed for R410A and their interchangeability

Conventional air

conditioner installation

Whether new equipment can be used with conventional refrigerant

Yes

*(Note 1)

Yes

No.

Used tool

Flare tool Copper pipe gauge for

adjusting projection margin

Torque wrench

Gauge manifold Charge hose

Vacuum pump adapter Electronic balance for

refrigerant charging Refrigerant cylinder Leakage detector Charging cylinder

Usage

Pipe flaring

Flaring by conventional flare tool

Connection of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating

Refrigerant charge Refrigerant charge

Gas leakage check Refrigerant charge

air conditioner installation

Existence of new equipment for R410A

Yes

Yes Yes

Yes

(Note 2)

R410A

Whether conventional equipment can be used

*(Note 1)

Yes

No No No

(Note 1) When flaring is carried out for R410A using the conventional flare tools, adjustment of projection

margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.

(Note 2) Charging cylinder for R410A is being currently dev eloped.

General tools (Conventional tools can be used.)

In addition to the above exclusive tools, the following equipments which serve also f or R22 are necessary as the general tools.

(1) Vacuum pump

Use vacuum pump by

attaching vacuum pump adapter. (2) Torque wrench (3) Pipe cutter (4) Reamer

(7) Screwdriver (+, –) (8) Spanner or Monkey wrench (9) Hole core drill (10) Hexagon wrench (Opposite side 4mm) (11) Tape measure (12) Metal saw

(5) Pipe bender (6) Lev el vial

Also prepare the following equipments for other installation method and run check. (1) Clamp meter (2) Thermometer

(3) Insulation resistance tester (4) Electroscope

Page 7

5. Recharge of Refrigerant

When recharge of the refrigerant is required, charge the new refrigerant with the specified amount in the procedure as described below .

Recover the refrigerant and check there is no refrigerant in the equipment.

Connect the charge hose to the packed valve service ports at gas side, liquid side, and balance side of the outdoor unit.

Connect the charge hose to vacuum pump adaptor.

Open the packed valves of the balance pipe fully at liquid and gas sides, and then return the valve at gas side a little to the closed side.

Open fully PMV of the outdoor unit.

• Turn on power of the outdoor unit.

• Short CN30 on I/F P.C. board of the outdoor unit.

•

Turn off power of the outdoor unit within 2 minutes after short-circuiting.

When the pressure has lowered until indication of the compound gauge pointed -0.1MPa (–76cmHg), open fully the handle Low and turn off the power of vacuum pump.

Leave it as it is for 1 to 2 minutes and check the indicator of the compound gauge does not return.

Set the refrigerant cylinder on the electron balance, connect the charge hose to connecting ports of the cylinder and the electron gauge, and then charge the liquid refrigerant from the service port at liquid side. (Shield with the gauge manifold so that refrigerant does not flow to gas side.)

(Charge the refrigerant as below.)

Low-

pressure gauge

High-

Open fully the handle Low of the gauge manifold, and then turn on the power of vacuum pump for vacuuming.

Never charge the refrigerant o ver the specified amount.

Do not charge the additional refrigerant.

Connected to indoor unit

Main pipe

Brazed

Fully tightened

Valve fully closed (gas side)

Connected to other terminal units

Valve fully closed (liquid side)

pressure is applied to the inside of the refrigerating cycle resulted in cause of breakage or injury.

Set the equipment so that liquid refrigerant can be charged.

When using a cylinder with siphon pipe, liquid can be charged without inversing the cylinder.

4mm-hexagonal wrench is required.

[ Cylinder with siphon ] [ Cylinder without siphon ]

Gauge manifold

OUTDOOR unit

Gauge manifold

OUTDOOR unit

Center unit

Service port

Copper pipe

Service port

Ø6.4

Siphon

VLV

Reducing valve

Ø6.4 Copper pipe

Gauge manifold

Nitrogen

gas

cylinder

Refrigerant

cylinder

Electronic

balance

Electronic

balance

Refrigerant

R410A refrigerant is consisted with HFC mixed refrigerant. Therefore if the refrigerant gas is charged, the composition of the charged refrigerant changes and characteristics of the equipment changes.

6. Environment

Use “Vacuum pump method” for an air purge (Discharge of air in the connecting pipe) in installation time.

• Do not discharge flon gas into the air to protect the earth environment.

• Using the vacuum pump method, clear the remained air (Nitrogen, etc.) in the unit. If the air remains, the pressure in the refrigerating cycle becomes abnormally high and an injury and others are caused due to burst.

Page 8

1. CONSTRUCTION VIEWS (EXTERNAL VIEWS)

200

1000 or more

15 or more

1000 or more

Obustacle

1000 or more

15 or more

Space required for

installation and servicing

149

175

207

Knockout for fresh

145.5

105

air intake Ø100

Bottom face of ceiling

595 to 660 Ceiling open dimension

142 64 368.5

700 Panel external dimension

595 to 660 Ceiling open dimension

525 Hanging bolt pitch

Check port

( 450)

Check port

(o 450)

200

Check port

( 450)

Drain-up standing-up size

Indoor unit

627.5

or less

Stand-up

Bottom face of ceiling

Stand-up

850 or less

Note)

595 to 660 Ceiling open dimension

As ABS is used for the drain discharge port of the main unit, the vinyl chloride paste cannot be used.

Use the flexible hose (Band fix) included in the package.

2.7

• Wired remote controller

120

(RBC-AMT31E)

120

268 27

220.5

Drain discharge port

Hanging bolt M10 or W3/8 local arrange

145.5 134

Bottom face of ceiling

Ceiling panel

200

Ø162 (Pitch)

For branch duct knockout square hole Ø150

4-Ø3.2 hole (For 4mm tapping screw)

Bottom face of ceiling

105235 235

575 Unit external dimension

Electric parts box

320.5

575 Unit external dimension

Ø162

(Pitch)

256

177

525 Hanging bolt pitch

700 Panel external dimension

595 to 660 Ceiling open dimension

Refrigerant pipe (Liquid) Ø6.4

For branch ductt knockout square hole Ø150

Refrigerant pipe (Gas) 0151, 0181MH : Ø12.7 0071 to 0121MH : Ø9.5

214 105

97.5 42 148

139.5

190.5

120

4-Ø3.2 hole (For 4mm tapping screw)

Wiring connection port

9310570

142

158

Page 9

2. WIRING DIAGRAM

PMV

Indoor unit

earth screw

Power supply

single phase

220-240V, 50Hz

220V, 60Hz

CN333

(WHI)

5 3 1

CN334

(WHI)

5 4

CN68 (BLU)

1 1 3 3

CN304

(GRY)

CN67 (BLK)

RED

1 1

WHI

3 3

Flow selector

unit earth screw

S(N)R(L)

6 4 3 1 2 5 6 4 3 1 2 5

1 2 3 4 5 6 1 2 3 4 5 6

CN82 (BLU)

5 3 1

5 4 3 2 1

RY302

RY303

Fuse

T6.3A

250V

P301

BLK

TC1

1 3 1 2 3

CN100 (BRW)

CN66 (WHI)

2 1

CN44

(BRW)

2 1

CN50 (WHI)

3 4

CN32

(WHI)

T10

(Fan drive) Option

Control P.C. board

CN61 (YEL)

1 3 1 2 3

CN34

(RED)

drive circuit

1 2 1 2 1 2

CN104

(YEL)

Motor

CN71

CN72

Fuse

T3.15A

250V

for Indoor unit

MCC-1402

TA TCJ TC2

CN101

CN102

(BLK)

(RED)

(CHK)

2 1

(DISP)

654321 54321654321

DC20V DC15V DC12V DC 7 V

CN81 (BLK)

Power supply circuit

CN60 (WHI)

CN309

(YEL)

3 11 2 1 2 1 2

CN80

(GRN)

CN73

(RED)

CN70 (WHI)

CN20 (BLU)

CN33 (WHI)

CN41 (BLU)

3 2

1 CN40

(BLU)

3 2

PNL

1 2

EXCT

1 2

Filter

1 5

4 3

GRL 2 1

1 2

2 3

3 4

4 5

BLK BLK

BLU BLU

Outdoor

unit

U2U1

remote controller

Wireed

1 2 3 4 5

LM2

BAU2U1

remote controller

1 2 3

LM1

4 5

WHI BLK

1 2 1 2

CN001

(WHI)

Adapter for

wireless

Symbol

TA TC1 TCJ TC2

LM1, LM2

DP FS

RY302

PMV

Parts name

Fan motor Indoor temp. sensor Temp. sensor Temp. sensor Temp. sensor Louver motor Drain pump motor Float switch Drain control relay Pulse motor valve

Color

indication

RED : RED WHI : WHITE YEL : YELLOW BLU : BLUE BLK : BLACK GRY : GRAY PNK : PINK ORN: ORANGE BRW: BROWN GRN: GREEN

1. indicates the terminal bolock letter. Letter at inside indicates the terminal number.

2. A dotted line and broken line indicate the wiring at site

3. indicates a control P.C. board.

Page 10

3. PARTS RATING

3-1. Parts Rating

Model MMU-

Fan motor Motor for horizontal grille Pulse motor Pulse motor valve TA sensor TC1 sensor TC2 sensor TCJ sensor Float switch Drain pump motor

AP0071MH AP0091MH AP0121MH AP0151MH AP0181MH

SWF-230-60-1R

MP24Z3N

EDM-MD12TF-3

EDM-B25YGTF-3 EDM-B40YGTF-3

Lead wire length : 155mm Vinyl tube Ø4 size lead wire length : 1400mm Vinyl tube Ø6 size lead wire length : 1500mm Vinyl tube (Black) Ø6 size lead wire length : 1400mm Vinyl tube (Red)

FS-0218-103

ADP-1409

3-2. Name of Each P art

Earth screw

It is included in the electric parts box.

Clip

The clip is to open/close the air inlet grille.

Air inlet grille

Air in the room is sucked from here.

Air outlet/Air outlet flap

Select air blow direction in cooling or heating operation each.

Air filter

Removes dust and trash. (Air filter is provided in the air grille.)

Page 11

3-3. Parts Name of Remote Controller

Display section

In the display example, all indicators are displayed for the explanation. In reality only, the selected contents are indicated.

• When turning on the leak breaker at the first time, [SET DATA] flashes on the display part of the remote controller. While this display is flashing, the model is being automatically confirmed. Accordingly, wait for a while after [SET DATA] display has disappeared, and then use the remote controller.

78 9

1 4

3 5

SET

DATA

SETTING

TEST

UNIT No.

R.C. No.

CODE No.

SET DATA display

Displayed during setup of the timer.

Operation mode select display

The selected operation mode is displayed.

CHECK display

Displayed while the protective device works or a trouble occurs.

PRE-HEAT display

Displayed when the heating operation starts. While this indication is displayed, the indoor fan

stops.

Operation ready display

Displayed when cooling or heating operation is impossible because the outdoor temperature goes out of the operable range.

FILTER RESET

SET

TEMP .

DATA

SETTING

TEST

10 11

TEST

TIMER SET

UNIT No.

R.C. No.

SWING/FIXTIME

16 13

CODE No.

ON / OFF

FAN

MODE

VENT

UNITSET CL

Display section

Operation section

Timer time display

Time of the timer is displayed. (When a trouble occurs, the check code is displayed.)

Timer SETIN setup display

When pushing the Timer SET button, the display of the timer is selected in order of [OFF] → [ON]

Filter display

If “FILTER ” is displayed, clean the air filter.

TEST run display

Displayed during a test run.

Flap position display

Displays flap position.

SWING display

Displayed during up/down movement of the flap.

Set up temperature display

The selected set up temp. is displayed.

Remote controller sensor display

Displayed while the sensor of the remote controller is used.

→ [OFF] repeat OFF timer

→ No display.

No function display

Displayed if there is no function even if the button is pushed.

Air volume select display

The selected air volume mode is displayed.

(AUTO) (MED.) (LOW)

Mode select control display

Displayed when pushing “Operation mode select ” button while the operation mode is fixed to heating or cooling by the system manager of the air conditioner.

Central control display

Displayed when using the remote controller together with the central control remote controller, etc. If Remote controller is prohibited at the centralcontrol side,

ON / OFF

the change is not accepted. (The contents available to be set up on the remote controller differ according to the central control mode. For details, refer to Owner’s Manual of the central control remote controller.)

MODE

(HIGH)

flashes when operating

, / buttons and

Page 12

Operation section

ON / OFF

Push each button to select a desired operation. This remote controller can operate the maximum 8 indoor units.

• The details of the operation needs to be set up once, afterward, the air conditioner can be used by pushing

ON / OFF

button only.

TEMP.

FIL TER

TEST

RESET

5 3

Air volume select button

Selects the desired air volume mode.

Timer set button

TIMER SET button is used when the timer is set up.

Check button

The CHECK button is used for the check operation. During normal operation, do not use this button.

Fan button

FAN button is used when a fan which is sold on the market or etc. is connected.

TIMER SET

ON / OFF

FAN

SWING/FIXTIME

MODE

VENT

9 4

UNITSET CL

When the button is pushed, the operation starts, and it stops by pushing the button again.

When the operation has stopped, the operation lamp and all the displays disappear.

Operation select button

Selects desired operation mode.

Set up temperature button

Adjusts the room temperature. Set the desired set temperature by pushing

button

or .

Filter reset button

Resets (Erases) “FILTER ” display.

Wind direction and Swing

UNIT

: If the multiple indoor units are operated by only one remote controller, select the units when the air direction is adjusted.

SWING/FIX

: Set up the auto swing and angle of the flap.

Operation lamp

Lamp is lit during the operation. Lamp is off when stopped.

Although it flashes when operating the protection device or abnormal time.

OPTION :

Remote controller sensor

Usually the TEMP. sensor of the indoor unit senses the temperature. The temperature on the surrounding of the remote controller can also be sensed. For details, contact the dealer from which you have purchased the air conditioner.

• In case that one remote controller controls the multiple indoor units, the setup operation is unavailable in group control.

Page 13

3-4. Correct Usage

LOW MED. HIGH

AUTO

When you use the air conditioner for the first time or when you change the SET DATA value, follow the procedure below. From the next time, the operation displayed on the remote controller will start by pushing the

ON / OFF

Preparation

Turn on the main power switch and/or the leakage breaker.

• When the power supply is turned on, a partition line is display ed on the display part of the remote controller. * After the power supply is turned on, the remote controller does not accept an operation for approx. 1 minute,

but it is not a f ailure.

• While using the air conditioner, operate it only with

button only.

switch and the leak breaker.

REQUIREMENT

ON / OFF

button without turning off the main power

TEMP.

ON / OFF

(Dehumidity)

SWING/FIXTIME

MODE

FAN

UNITSET CL

” button.

TIMER SET

FIL TER

TEST

RESET

Push

The operation lamp goes on, and the operation starts.

Select an operation mode with the “MODE

One push of the button, and the display changes in the order shown on the right.

• In HEAT mode, if the room temperature reaches to the set temperature, the outdoor unit stops and the air

flow becomes ULTRA LOW and the air volume decreases.

• In the heating mode, the fan stops so that cool air is not discharged and Heat is displayed.

Select air volume with “FAN

One push of the button, and the display changes in the order shown on the right.

• When air volume is “AUTO ”, air volume differs according to the temperature difference between set temp. and room temp.

ON / OFF

button.

FAN

” button.

MODE

VENT

AUTO

Cooling only model

DRY COOL FAN

Heat-pump model

HEAT DRY COOL FAN

• In DRY mode, “AUTO ” is displayed and the air volume is LOW.

• In heating operation, if the room temperature is not heated sufficiently with VOLUME “LOW ” operation, select “MED. ” or “HIGH ” operation.

Determine the set up temperature by pushing the “TEMP. ” or “TEMP. ” button.

Stop

Push

The operation lamp goes off, and the operation stops.

ON / OFF

button.

Page 14

3-5. Automatic Operation (Super Heat Recovery Type Only)

When you set the air conditioner in mode or switch over from AUTO operation because of some settings change, it will automatically select either cooling, heating, or fan only operation depending on the indoor temperature.

TEMP.

ON / OFF

FAN

SWING/FIXTIME

UNITSET CL

FIL TER RESET

TIMER SET

TEST

Start

ON / OFF

Push this button to start the air conditioner.

Mode select button (MODE)

Select Auto.

Temperature button

Set the desired temperature.

• In case of cooling, start the operation after approx. 1 minute.

• In case of heating, the operation mode is selected in accordance with the room temperature and operation starts after approximately 3 to 5 minutes.

• When you select the Auto mode, it is unnecessary to set the fan speed. The FAN speed display will show A UTO and the fan speed will be automatically controlled.

• After the heating operation has stopped, FAN operation may continue for approx. 30 seconds.

• When the room temperature reaches the set temperature and the outdoor unit stops, the super low wind is discharged and the air volume decreases e xcessively. During defrost operation, the fan stops so that cool air is not discharged and “HEAT READ Y” is displayed.

• If the Auto mode is uncomfortable, you can select the desired conditions manually.

button

MODE

VENT

NOTE

When restarting the operation after stop

• When restarting the operation immediately after stop, the air conditioner does not oper ate for approx. 3 minutes to protect the machine.

Stop

Push

Push this button again to stop the air conditioner.

ON / OFF

button.

Page 15

3-6. TIMER Operation

OFF

(OFF timer) (Repeat OFF timer)

No display

(ON timer)

OFF ON

A type of timer operation can be selected from the following three types. OFF timer : The operation stops when the time of timer has reached the set time. Repeat OFF timer : Every time, the operation stops after the set time has passed. ON timer : The operation starts when the time of timer has reached the set time.

Timer operation

TEMP.

TIMER SET

FAN

ON / OFF

MODE

SWING/FIXTIME

FIL TER

TEST

RESET

Push TIMER SET button.

• The timer display (type) changes for every

push of the button.

• SET DATA and timer time displays flash.

Push

For e very push of button, the set time increases in the unit of 0.5 hr (30 minutes). The maximum set time is 72.0 hr. For e very push of button, the set time decreases in the unit of 0.5 hr (30 minutes). The minimum set time is 0.5 hr.

TIME

to select “SET TIME”.

UNITSET CL

VENT

Push SET button.

SETTING

•

display disappears and timer time display goes on.

(When ON timer is activated, timer time, ON timer are displayed and other displays disappear.)

Cancel of timer operation

Push CL button.

• TIMER display disappears.

• When the operation stops after the timer reached the preset time, the Repeat OFF timer resumes the operation by pushing set time.

ON / OFF

NOTICE

button and stops the operation after the time of the timer has reached the

Page 16

3-7. Adjustment of Wind Direction

• While the air conditioner stops, the horizontal flap (Up/Down air direction adjustment plate) automatically directs upward.

• While the air conditioner is in ready status for heating, the horizontal flap (Up/Down air direction adjustment plate) directs upward. The swinging operation starts after heating ready status has been cleared, but “SWING ” is displayed on the remote controller even if the status is ready to heating.

How to set up the air direction

SWING/FIX

Push

button during operation.

Every pushing the button, the air direction changes.

In Heating operation

Set the horizontal flap (Up/Down air direction adjustment plate) downward. If directing it upward, the hot air may not come to the foot come to the foot.

Initial setup

How to start swinging

SWING/FIX

Push

button. Set direction of the horizontal flap (Up/Down air direction adjustment plate) to the lowest position and then push

SWING/FIX

button again.

• [SWING ] is displayed and the air direction

automatically changes upward/downward. In case when one remote controller controls the multiple indoor units, each indoor unit can be selected and its air direction can be set up.

How to stop swinging

SWING/FIX

Push

button again during swinging of the horizontal flap.

• The horizontal flap can be stopped at the desired

position. After then the air direction can be again set up from the uppermost position by pushing button.

* While the horizontal flap is set downward in cool-

ing/drying operation, it does not stop. If stopping the horizontal flap which directs downward during swinging, it stops after moving to the 3rd position from the top position.

UNIT

• To set up the air direction individually, push

button to display each indoor unit No. in a group control. Then set up the air direction to a displayed indoor unit.

• If there is no display, all the indoor units can be

operated collectively.

• Every pushing

UNIT

button, the display exchanges

as shown in the figure.

SWING/FIX

UNIT

In Cooling / Dry operation

Set the horizontal flap (Up/Down air direction adjustment plate) upward. If directing it downward, the dew may fall on near the air air outlet port or it drips.

TEMP.

TIMER SET

SWING/FIXTIME

FIL TER

TEST

RESET

1, 2, 3 4

In FAN operation

Initial setup

Display when stopping the swing

Fan/Heat operation

ON / OFF

FAN

UNITSET CL

In all modes

Initial setup

MODE

VENT

Series of operation

Cool/Dry operation

Unit No. 1-1No display Unit No. 1-2

Unit No. 1-4 Unit No. 1-3

Page 17

3-8. Information

Confirmation before operation

• Turn on the power switch 12 hours before starting the operation.

• Make sure whether earth wire is connected.

• Make sure the air filter is connected to the indoor unit.

Heating capacity

• A heat pump system which absorbs heat from outside of the room and then discharges heat into the room is adopted for heating. If the outside temperature falls, the heating capacity decreases.

• When the outside temperature is too low, it is recommended to use this air conditioner together with other heating equipment.

Defrost during heating operation

• In heating operation, if there is frost on the outdoor unit, the operation changes automatically to the defrost operation (Approx. 2 to 10 minutes) to increase the heating efficiency.

• During defrost operation, the fan of the indoor unit stops.

3-minutes protection

Protective device (High pressure s witch)

This device stops automatically an operation when excessive force is applied on the air conditioner.

If the protective device w o rks, the operation stops and the operation lamp flashes.

When the protective device works, the indication and the check code are displayed on the display

section of the remote controller. In the following cases, the protective device may work.

In cooling operation

• The suction port or discharge port of the outdoor unit is closed.

• A strong wind continuously blows to the discharge port of the outdoor unit.

In heating operation

• Dust or waste adheres excessively to air filter of the indoor unit.

• The discharge port of the indoor unit is closed.

If the protective device w o rks, turn off the main power switch, solve the cause, and then start the operation again.

TEST

• When restarting the operation just after the operation has been stopped or the main power switch has turned on, the outdoor unit does not work for approx. 3 minutes in order to protect the air conditioner.

Power failure

• If a power failure occurred during operation, all operations stop.

• When the power is returned after a power failure, the operation lamp notifies the power-ON by flashing operation lamp on the remote controller.

• When restarting the operation, push button again.

ON / OFF

Fan rotation in stopped unit

• In heating operation even in the stopped indoor unit, the fan rotates once for several minutes per approx. an hour when the other indoor unit is operating to protect the air conditioner .

Cooling/Heating operation of Super Modular Multi system air conditioner

• Although each indoor unit can be individually controlled in the Super Modular Multi system air conditioner, the cooling oper ation and the heating operation cannot be simultaneously performed in the multiple indoor units which are connected to an outdoor unit.

• If the cooling operation and the heating operation are simultaneously performed, the indoor unit

which ex ecutes cooling operation stops, and on the operation section lights up. On the other hand, the indoor unit which executes heating oper ation continues running. In a case that the manager of the air conditioner has fixed the operation to cooling or heating, an operation other than that set up is unavailable. If an operation other than that

set up is ex ecuted, on the operation section lights up and the operation stops.

Characteristics of heating operation

• The wind is not out just after starting an operation. The hot wind starts to blow 3 to 5 minutes after (Time differs according to indoor/outdoor temperature.) the indoor heat exchanger has warmed up.

• During operation, the outdoor unit may stop if the outside temperature rises.

Page 18

3-9. Air Conditioner Operations and Performance

3 minutes protection function

3-minutes protection function prevents the air conditioner from starting for initial 3 minutes after the main powe r switch/circuit breaker is turned on for re-starting the air conditioner.

Power failure

Power failure during operation will stop the unit completely.

• To restart the operation, push the START/STOP button on the remote controller.

• Lightning or a wireless car telephone operating nearby may cause the unit to malfunction. Turn off the main power switch or circuit breaker and then turn them on again. Push the START/STOP button on the remote controller to restart.

Heating characteristics Preheating operation

The air conditioner will not deliver warm air immediately after it is turned on. Warm air will start to flow out after approximately 5 minutes when the indoor heat e xchanger warmed up.

Warm air control (In heating operation)

When the room temperature reaches the set temperature, the f an speed is automatically reduced to prevent to blow cold draft. At this time, the outdoor unit will stop.

Defrosting operation

If the outdoor unit is frosted during the heating operation, defrosting starts automatically (for approximately 2 to 10 minutes) to maintain the heating capacity.

• The fans in both indoor and outdoor units will stop during the defrosting operation.

• During the defrosting operation, the defrosted water will be drained from the bottom plate of the outdoor unit.

Heating capacity

In the heating operation, the heat is absorbed from the outside and brought into the room. This way of heating is called heat pump system. When the outside temperature is too low, it is recommended to use another heating apparatus in combination with the air conditioner .

Attention to snowfall and freeze on the outdoor unit

• In snowy areas, the air inlet and air outlet of the outdoor unit are often covered with snow or frozen up. If snow or freeze on the outdoor unit is left as it is, it may cause machine failure or poor warming.

• In cold areas, pay attention to the drain hose so that it perfectly drains w ater without w ater remaining inside for freeze prevention. If water freezes in the drain hose or inside the outdoor unit, it may cause machine failure or poor warming.

Air conditioner operating conditions

For proper perf ormance, operate the air conditioner under the following temperature conditions:

Cooling operation

Dry operation

Outdoor temperature : –5°C to 43°C Room temperature : 21°C to 32°C (Dry valve temp.), 15°C to 24°C (Wet valve temp.)

CAUTION

Outdoor temperature : 15°C to 43°C (Maximum suction air temp. 46°C) Room temperature : 17°C to 32°C

Room relative humidity – less than 80 %. If the air conditioner operates in excess of this figure, the surface of the air conditioner may cause dewing.

Heating operation

If air conditioner is used outside of the above conditions, safety protection may work.

Outdoor temperature : –15°C to 15°C (Wet valve temp.) Room temperature : 15°C to 28°C (Dry valve temp.)

Page 19

3-10. When the Following Symptoms are Found

Check the points described below before asking repair servicing.

Symptom

Outdoor unit • White misty cold air

or water is out.

• Sometimes, noise “Pushu !” is heard.

Indoor unit •“Swish” sound is

heard sometimes.

• Slight “Pishi!” sound is heard.

• Discharge air smells.

• The operation lamp flashes

•“STANDBY indication is lit.

Check again.

• Sound or cool air is output from the stand by indoor unit.

• When power of the air conditioner is turned on, “Ticktock” sound is heard.

Cause

• Fan of the outdoor unit stops automatically and performs defrost operation.

• Solenoid valve works when defrost operation starts or finishes.

• When the operation has started, during the operation, or immediately after the operation has stopped, a sound such as water flows may be heard, and the operation sound may become larger for 2 or 3 minutes immediately after the operation has started. They are flowing sound of refrigerant or draining sound of dehumidifier.

• This is sound generated when heat exchanger, etc. expand and contract slightly due to change of temperature.

• Various smell such as one of wall, carpet, clothes, cigarette, or cosmetics adhere to the air conditioner.

• Flashes when power is turned on again after power failure, or when power switch is turned on.

”

• When cooling operation cannot be performed because another indoor unit performs heating operation.

• When the manager of the air conditioner has fixed the operation to COOL or HEAT, and an operation contrary to the setup operation is performed.

• When fan operation stopped to prevent discharge of hot air.

• Since refrigerant is flowed temporarily to prevent stay of oil or refrigerant in the stand by indoor unit, sound of flowing refrigerant, “Kyururu” or “Shaa” may be heard or white steam when other indoor unit operates in HEAT mode, and cold air in COOL mode may be blow-out.

• Sound is generated when the expansion valve operates when power has been turned on.

Operates or stops automatically. Does not operate.

Silent

Air is not cooled or warmed sufficiently.

It is not a failure.

It’s strange.

• Is the timer “ON” or “OFF”?

• Is it a power failure?

• Is the power switch turned off?

• Is the power fuse or breaker blown?

• Has the protective device operated? (The operation lamp goes on.)

• Is the timer “ON”? (The operation lamp goes on.)

• Are COOL and HEAT selected simultaneously? (“STANDBY indication is lit on the display column of the remote controller.)

• Is the suction port or discharge port of the outdoor unit obstructed?

• Are any door or window open?

• Is the air filter clogged with dust?

• Is discharge flap of the indoor unit set at appropriate position?

• Is air selection set to “LOW” “MED.”, and is the operation mode set to “FAN”?

• Is the setup temp. the appropriate temperature?

• Are COOL and HEAT selected simultaneously? (“STANDBY indication is lit on the display column of the remote controller.)

”

When the following symptoms are found, stop the operation immediately , turn off the power switch, and contact the dealer which you have purchased the air conditioner.

• Activation of switch is unstable.

• Fuse or breaker is blown periodically.

• Foreign matters or water entered by mistak e.

• When if activation cause of the protective device has been removed, the operation is not performed.

• Other unusual status occurred.

Page 20

Accessory parts and Parts to be procured locally

H Accessory parts

Part name

Installation Manual

Heat insulating pipe

Q’ty

Shape

This manual

(Ensure hand over to customer)

For heat insulation of the pipe connecting section

Usage

PRECAUTIONS FOR SAFETY

• Ensure that all Local, National and International regulations are satisfied.

• Important safety information are described in this installation manual. Please ensure this manual is read thoroughly and kept for future reference.

• After the installation work, perform a trial operation to check for any problem. Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

• Turn off the main power supply switch (or breaker) before any unit maintenance.

• Ask the customer to keep the Installation Manual together with the Owner’s Manual.

Installation pattern

Installation gauge

Pattern fixing screw

Heat insulator

Washer

Hose band

Flexible hose

Heat insulator A

Heat insulator B

——

M5 × 16L

For checking of ceiling opening and the main unit position For positioning of the ceiling position

(To be used with the installation pattern) For attach the installation pattern

For heat insulation of drain connecting section

For hanging unit

For connecting drain pipe

For adjusting core-out of drain pipe

For sealing of wire connecting port

Refrigerant piping

• Piping material used for the conventional refrigerant cannot be used.

• Use copper pipe only with a wall thickness of 0.8 mm or more for Ø6.4, Ø9.5, Ø12.7.

• Flare nut and flare operations are also different from those of the conventional refrigerant. Use the flare nut fitted to the indoor unit of the air conditioner.

CAUTION New Refrigerant Air Conditioner Installation

• THIS AIR CONDITIONER FEATURES A NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DEPLETE OZONE LAYER.

The pressure of R410A is 1.6 times higher than that of former refrigerant R22. The refrigerating oil has also been changed. Therefore be sure that any former refrigerant, refrigerant oil or any other contaminants do not enter the refrigerating cycle of the air conditioner, during either installation or service work. If incorrect tools or operating procedures are used, there is a possibility of a serious accident. Use only tools and materials that have been designed to operate with R410A.

To prevent the risk of charging with an incorrect refrigerant, the dimensions of the charging port connections are different to those used for conventional refrigerant. Therefore only tools designed to operate with R410A can be used.

For connecting pipes, use piping specifically designed for R410A. During installation, ensure pipes are clean and ensure contaminants do not enter in the pipes as the system is

affected by impurities such as water, oxide scales, dirt, oil, etc. Do not use existing pipe work from previous installation as this will cause problems due to pressure resistances and impurities within the pipe.

CAUTION To Disconnect the Appliance from Main Power Supply.

This appliance must be connected to the main power supply by means of a switch with a contact separation of at least 3 mm.

WARNING

• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.

Inappropriate installation may result in water leakage, electric shock or fire.

• Turn off the main power supply switch or breaker before attempting any electrical work.

Make sure all power switches are off. Failure to do so may cause an electric shock.

• Connect all of the installation wiring correctly.

If the installation wiring is incorrect electrical parts may be damaged.

• During the transportation and installation of the air conditioning unit, ensure that gaseous matter other than the specified refrigerant does not enter into the refrigeration cycle.

If a refrigerant becomes contaminated with foreign gases, the gas pressure within the refrigerant cycle will become abnormally high and may result in the fracture of pipe work and possible human injury.

• Do not modify this unit by removing any of the safety guards or by overriding any of the safety interlock switches.

• Exposure of the unit to water or other forms of moisture before installation may cause a short-circuit of the electrical parts.

Do not store it in a wet basement or expose to rain or water.

• After unpacking the unit, examine for possible damage.

• Do not install in a place that might increase the vibration of the unit.

• To avoid personal injury (with sharp edges), be careful when handling parts.

• Perform installation work properly according to the Installation Manual.

Inappropriate installation may result in water leakage, electric shock or fire.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that in the event of a refrigerant leak the rooms does not exceed the critical level.

Page 21

1000

or more

15 or more

1000 or more

Obstacle

283

or more

283

or more

1000 or more

PRECAUTIONS FOR SAFETY

• Install the air conditioner securely in a location where the base can sustain the weight of the unit adequately.

• Perform the specified installation work to guard against an earthquake.

If the air conditioner is not installed appropriately, accidents may occur due to the unit falling.

• If refrigerant gas has leaked during the installation work, ventilate the room immediately.

If the leaked refrigerant gas comes in contact with fire, noxious gases may be generated.

• After the installation work, confirm that refrigerant gas does not leak.

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gases may be generated.

• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Ensure the power supply to the air conditioner is exclusive to that unit only.

An insufficient power supply capacity or inappropriate installation may cause fire.

• Use only the specified wiring during the unit installation. Ensure that all terminals are securely fixed, so preventing any external forces having a negative effect on the terminals.

• Conform to the regulations of the local electric authority when wiring the power supply.

Inappropriate grounding may cause an electric shock.

• Do not install the air conditioner in a location that may be subjected to a risk of exposure to a combustible gas.

If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.

SELECTION OF INSTALLATION PLACE

WARNING

• The air conditioner must be installed in a location that can support the weight of the unit effectively.

If the unit is not installed on a foundation that can support its weight effectively, the unit may fall down, resulting in possible human injury.

• Where required ensure that the units installation is sufficient enough to withstand against an earthquake.

An insufficient installation could result in the unit falling, causing possible human injury.

• Install the air conditioner at a minimum height of 2.5 m from the floor.

Do not insert your hands or others into the unit while the air conditioner is operating.

CAUTION

Upon approval from the customer, install the air conditioner in a place that satisfies the following conditions.

• A place where the unit can be installed horizontally.

• A place where a sufficient servicing space can be maintained for safety maintenance and unit check.

• A place where the drain water can be exited from the unit, without causing a problem.

Avoid installing in the following places.

• Places exposed to air with a high salt content (seaside area), or places exposed to large quantities of sulfide gas (hot spring). (Should the unit be used in these places, special protective measures are needed.)

• Places exposed to oil, vapor, oil smoke or corrosive gas.

• Places where organic solvent is used nearby.

• Places close to a machine generating high frequency.

• Places where the discharged air blows directly into the window of the neighbouring house. (For outdoor unit)

• Places where the noise from the outdoor unit can be easily transmitted to the neighboring property. (When installing the air conditioner on the boundary with a neighbor, pay due attention to the level of noise.)

• Places with poor ventilation.

Installation space

Ensure there is sufficient space to install the unit and to perform maintenance work as and when required. Keep 15mm or more for clearance between top plate of the indoor unit and the ceiling surface.

Installation space

Ceiling height

Model MMU-AP

0071 to 0121 type 0151 to 0181 type

When the ceiling height exceeds the standard distance of a 4-way air discharge cassette as detailed in the following table. The air-flow may not be sufficient to heat the room. It is therefore necessary to set the unit to high ceiling mode or adjust the direction of the ceiling discharge.

For setup of the high ceiling mode, refer to the details of Applicable controls “To incorporate a filter sold separately” and “In case of installation to high ceiling” within this Manual.

Installable ceiling height list

Indoor unit capacity type

Discharge direction

Standard (At shipment)

High ceiling (2) High ceiling (3)

Installable ceiling height

Up to 2.7 m Up to 3.5 m

0071 to 0121 type 0151 type 0181 type

4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way

2.7 ——2.9 ——3.2 —— ———3.2 ——3.4 —— ———3.5 ——3.5 ——

Setup of high ceiling

Setup data

0000 0002 0003

(Unit: m)

REQUIREMENT

• When high ceiling (1) or (3) is used with 4-way blowing, a draft is easily recognized due to drop of discharge temperature.

The air filter cleaning signal duration (Notification of filter cleaning) on the remote controller can be changed according to the condition of installation.

If the room is not heated due to the installation place or construction of the room, the detection temperature of heating can be raised.

For setup method, refer to “Change of lighting term of filter sign” and “Increased heating effect” in the Applicable controls of this Manual.

Page 22

595 to 660 Ceiling open dimension

Space required for

installation and servicing

200

525 Hanging bolt pitch

595 to 660 Ceiling open dimension

700 Panel external dimension

142 64 368.5

145.5

105

575 Unit external dimension

320.5

595 to 660 Ceiling open dimension

Check port

(o 450)

Bottom face of ceiling

Ceiling panel

Drain discharge port

Hanging bolt M10 or W3/8 local arrange

Wiring connection port

For 150 diameter branch duct knockout square hole

Knockout for 100 diameter fresh air intake

Electric parts box

Ø162

For 150 diameter branch duct knockout square hole

4 screw holes (For 4 mm tapping screw)

Bottom face of ceiling

Refrigerant pipe (Gas) 0151, 0181MH : Ø12.7 0071 to 0121MH : Ø9.5

Refrigerant pipe (Liquid) Ø6.4

268 27

134

145.5

220.5

1000 or more

Obstacle

1000 or more

15 or more

Drain-up standing-up size

Note)

As ABS is used for the drain discharge port of the main unit, the vinyl chloride paste cannot be used.

Use the flexible hose (Band fix) included in the package.

Stand-up

627.5

or less

Ceiling

Indoor unit

Stand-up

850 or less

300 or less

9310570

139.5

190.5

158

214 105

177

207

575 Unit external dimension

105235 235

175

149

525 Hanging bolt pitch

595 to 660 Ceiling open dimension

700 Panel external dimension

256

Ø162

142

120

97.5 42 148

200

Check port

( 450)

Check port

( 450)

120

2.7

120

• Wired remote controller (RBC-AMT31E)

SELECTION OF INSTALLATION PLACE

In case of wireless type

The wireless remote controller can be operated up to a maximum of 8 m from the infra-red receiver.

Therefore ensure that the remote controller will be mounted and used within this stated parameter.

• To prevent malfunction do not mount or operate in a location that is subjected to either a fluorescent lamp or direct sunlight.

• A maximum of 6 indoor units with wireless remote controller can be installed within the same room.

The installation of the air conditioning unit must be positioned in a location that can sufficiently support its weight and give protection against adverse environmental conditions.

Failure to do so may result in unit damage and possible human injury. Any incomplete installation may also cause possible risk of human injury.

• Unpack the package, take out the product and then place it on the floor so that the same surface directs

• Never put the products taken out from the packing box in a

Strictly comply to the following rules to prevent damage of the indoor units and human injury.

• Do not place heavy objects on the indoor unit. (Even when units are still packaged)

• Always carry the unit as packaged from the factory wherever possible.

• To move the indoor unit, hold the hanging brackets (4 positions) only.

• To be carried by two or more persons. Do not strap the unit in positions other than that stated.

8 m or less

INSTALLATION OF INDOOR UNIT

underneath as it is placed in the package.

WARNING

pile, or put other load on them; otherwise there is a possibility to damage electric parts, fan parts, draining mechanism, and etc.

If the both sides are turned over, a deformation of mounting metal of the ceiling panel which is sold separately, etc may be caused. Accordingly the product may be damaged and

OK NO GOOD

the installation becomes impossible in some cases.

REQUIREMENT

If carrying in the indoor unit unpacked by necessity, be sure to use buffering cloth, etc. to prevent damaging the unit.

Do not apply force to other parts (refrigerant pipe, drain pan, foamed parts, or resin parts etc.).

Dimensional view

Page 23

Hanging bolt (W3/8 or M10)

Nut (W3/8 or M10)

(1) M10 washer supplied, all other material

must be procured locally.

(2) To ensure that the unit is mounted safely, the

hanging bolt must be positioned just below the hanging bracket as shown in the diagram.

(1) M10 flat washer (Accessory)

(2) M10 flat washer (Accessory)

Nut (W3/8 or M10)

Installation gauge 2) 10 to 42 mm

1) 23 to 28 mm

Ceiling panel

Indoor unit

INSTALLATION OF INDOOR UNIT

Ceiling opening and installation of hanging bolts

• Evaluate and determine the piping and wiring requirements inside the ceiling prior to the hanging of the unit.

• After installation place of the indoor unit has been determined, create opening in ceiling and install the hanging bolts.

• For the ceiling opening size and pitch for hanging bolts refer to the dimensional drawing and the supplied installation pattern.

• Once the ceiling void has been created, ensure that the drain pipe, refrigerant pipes, inter-connecting wires and all control wires are in place prior to installing the actual indoor unit.

Please procure the hanging bolts and nuts for installation of the indoor unit at local site.

Hanging bolt

Nut

M10 or W3/8 M10 or W3/8

4 pieces

12 pieces

How to use the supplied installation pattern

The installation pattern is enclosed within the packaging of the air conditioner.

Existing ceiling void

Use the pattern to determine the position and size of the opening and

Indoor unit

location of the hanging bolts.

New ceiling void

Use the pattern to determine the position of the new ceiling opening. Cut off slit section of the main unit of the installation pattern.

Cut off the outside of the pattern according to size of the ceiling opening. (There is a slit on the standard opening size section.)

• Install the indoor unit after installation of the hanging bolts.

• Using the supplied pattern attach it to the indoor unit using the supplied fixing screws (M5 × 16L 4off). (Screw pattern to the ceiling panel hanging brackets of the indoor unit)

• When creating the opening ensure it is as per the outer dimensions of the supplied pattern.

Installation pattern (Attached)

M5 × 16L screws (Attached) These screws are exclusive to the

installation pattern. When installing the ceiling panel, the other exclusive screws attached to the ceiling panel (sold separately) are used.)

Cut off the installation pattern along slit of the main unit.

Treatment of ceiling

The ceiling differs according to the structure of the building. For details, consult your architect. In the process after the ceiling panels have been removed, it is important to reinforce the ceiling construction and

ensure the ceiling remains in a horizontal position. This is to prevent possible vibration of the ceiling panels.

1. Cut and remove the ceiling material.

2. Reinforce the cut surface of the ceiling construction and add support for fixing the end of ceiling panel.

Installation of hanging bolt

Use M10 hanging bolts (4 off, locally procured). When mounting the unit, set the pitch of the hanging bolts according to the size of the unit as detailed on the

dimensional drawing.

New concrete slab

Install the bolts with insert brackets or anchor bolts.

(Blade type

bracket)

(Slide type

bracket)

(Pipe hanging

anchor bolt)

Anchor bolt

Reinforcing steel

Steel flame structure

Use existing angles or install new support angles.

Hanging bolt

Hanging bolt Support angle

Existing concrete slab

Use a hole-in anchors, hole-in plugs, or a hole-in bolts.

Installation of indoor unit

• Attach the nut (M10 or W3/8: Procured locally) and washer (Ø34 mm) to the hanging bolt.

• Put washers at either side of the T-groove on the hanging bracket of the indoor unit in order to hang the unit.

• Using a spirit level, check that all four sides are horizontal. (Horizontal positioned within 5 mm)

• Cut off the installation gauge from the installation pattern.

• Using the installation gauge check and adjust clearance between the indoor unit and the ceiling opening (1) (10 to 42 mm on each side). Ensure that the unit is level to the ceiling and within a distance of (2) 23 mm to 28 mm below. The installation gauge has details of how to use printed on it.

Note) Install the indoor unit so that the end part of opening does not

come into contact with the drain socket piping.

Level vial (Horizontal: within 5 mm)

Indoor unit

Hanging metal

10 to 42

Installation gauge

Before installation of the indoor unit be sure to remove the transportation cushion found between the fan and the bell mouth. Running the unit without removing the cushion may damage the fan motor.

Hanging bolt

23 to 28 mm (1)

mm (2)

Ceiling board

REQUIREMENT

Installation of ceiling panel (Sold separately)

Install the ceiling panel after completion of the installation of the indoor unit, including all piping and wiring.

Install the ceiling panel as per the supplied Installation Manual.

Check the installation dimensions of the indoor unit and the ceiling opening are correct and then install.

REQUIREMENT

Ensure the ceiling panel is mated to the ceiling surface or the indoor unit.

If the panel and unit are not mated together this may result in the formation of dew condensation causing a possible water leak.

Be sure to remove the cushion for transportation between the fan and the bell mouth.

First remove the 4 corner caps from the ceiling panel and fit to the indoor unit.

Installation of remote controller (Sold separately)

For installation of the wired remote controller, follow the Installation Manual supplied with the remote controller.

• Do not expose remote controller to direct sunlight or excessive heat.

• When using a wireless type remote controller check receiver on the indoor unit receives a signal.

• For a wireless type controller ensure that it is used and mounted a minimum distance of 1m apart from any other electrical devices (TV, Stereo, etc). As this may cause interference with the devices.

Page 24

Rising up

627.5mm or less

Rising up 850mm or less

300mm or less

Indoor unit

Underneath of ceiling

220–240V, 1N ~, 50Hz 220V 1N ~, 60Hz

White

Black

CN34 (RED)

Black

Red

Pull out connector CN34 (Red) from P.C. board.

R(L) S(N)

DRAIN PIPING WORK

CAUTION

• Install the drain piping so that the water drains effectively.

• Apply heat insulation to prevent dew condensation from forming.

Pipe material/Insulator and size

The following materials for piping work and insulation are to be procured locally.

Pipe material

• Incorrectly installed pipe work may result in a water leak.

Insulator

REQUIREMENT

• Ensure insulating of the drain pipes and connecting parts on the indoor units.

• The drain pipe should have a downward slope of at least 1/100 and ensure there are no swells or blockages as this will cause abnormal sounds.

• The maximum traverse length of drain pipe is 20 m. Provide support brackets at intervals of 1.5 to 2 m where necessary to prevent movement.

• Install the combined piping as shown in the illustration.

• Do not create an air purge in the pipework, as the water would leak from this point.

(Collective pipes)

• The hard vinyl-chloride pipe cannot be connected directly to the drain pipe connecting port of the indoor unit. For connection with the drain pipe connecting port, ensure that the supplied flexible hose is fitted.

• Adhesive agent cannot be used for the pipe connecting port (hard socket) on the indoor unit.

Be sure to use the supplied hose band for fixing, otherwise there is a risk of damage or water leakage from the drain pipe connecting port.

As long as possible (10cm)

VP25

VP30 or more

Drain pipe connecting port (Hard socket)

Attached hose band

Soft socket Hard socket

Adhesive agent prohibited

Hard vinyl chloride pipe socket for VP25 Hard vinyl chloride pipe VP25

(Outer diameter Ø32 mm) Foamed polyethylene foam, thickness:

10 mm or more

Heat insulator

1.5m to 2m

1/100 or more downward

Arched shape

Support bracket

GOOD

Tra p

VP25

Downward slope 1/100 or more

VP25 vinyl chloride pipe (Procured locally)

Attached flexible hose

Socket for VP25 (Procured locally)

Connection of drain pipe

• Connect the hard socket (Procured locally) to the hard socket side of the supplied flexible hose which has been installed.

• Connect the drain pipes (Procured locally) in turn to the connected hard sockets.

REQUIREMENT

• Using an adhesive agent for vinyl chloride,

connect the hard vinyl chloride pipes so that water does not leak.

• Allow sufficient time for the adhesive to set and

harden. (Refer to the instructions of the adhesive.)

Drain up

When it is not possible to achieve a natural downward slope on the drain pipe, you can create a vertical lift (Drain up) on the pipe.

• Set the height of the drain pipe within 850 mm from the bottom surface of the ceiling.

• The drain pipe should be piped from the drain pipe connecting port horizontally for a maximum of 300 mm and then piped vertically.

• After piping the vertical lift, ensure the pipe work is set to a downward gradient.

Check the draining

After completion of drain piping, Check water drains away and that no water leaks from

any of the connecting parts. At the same time check for any abnormal sounds from the drain pump.

Ensure drainage is checked during cooling mode.

When the electric work has finished:

• Before installing the ceiling panel, pour water as shown in the following figure, check water drains from the drain pipe connecting port (Transparent) in COOL mode and then check there are no water leaks from the drain pipes.

When the electric work has not finished:

• Pull out the float switch connector (3P: Red) from P.C. board connector (CN34: Red) of the electric parts box. (Ensure the power is turned off.)

• Connect the single-phase 220-240V, 1N, 50Hz (or 220V, 1N, 60Hz) power to the terminal blocks R (L) and S (N). (Never apply 220-240V to (A), (B), (U1) and (U2).)

• Pour water referring to the next page figure. (Amount: 1500 cc to 2000 cc)

• When the power is turned on, the drain pump motor drives automatically. Check water is drained from the drain pipe connecting port (Transparent), and then check there is no water leak from the drain pipes.

• After checking for water leaks on the drain, turn off the power supply, and re-attach the float switch connector to the original position (CN34) on the P.C. board and refit the electric parts box.

Connection of flexible hose

• Insert the soft socket of the supplied flexible hose into the connecting port of the drain pipe.

• Align the supplied hose band to the pipe connecting port end, and tighten.

• Fix the soft socket with the supplied hose

band, tighten at the upper position of the unit.

• The supplied flexible hose can bend up to

a maximum of 45°

REQUIREMENT

Drain pipe connecting port (Transparent)

Indoor unit body

max

45˚

NO GOOD

max

45˚

Align the attached hose band to the end of hose, set the tightening position upward, and then tighten it.

Flexible hose (Accessory)

VP25 vinyl chloride pipe (To be local procure)

Socket for VP25 vinyl chloride pipe (To be local procure)

Riser (Trap)

90˚ Bend

Page 25

90˚

Obliquity Roughness Warp

NO GOODOK

DRAIN PIPING WORK

REFRIGERANT PIPING

Thermal insulating process

• After checking of the draining, using the supplied thermal insulation fit to the flexible hose leaving no clearance at the connecting port of the indoor unit.

• Fit locally procured thermal insulation to the drain pipe leaving no clearance between the supplied insulation.

Flexible hose

Attached heat insulator

Check panel

Hose band

Heat insulator to be procured locally

Hard vinyl chloride pipe

CAUTION

Ensure water is poured slowly.

To reduce risk of water spreading throughout the unit, resulting in a possible fault.

Air

discharge area

Drain pan

WARNING

• If refrigerant gas leaks during the installation work, ventilate the room immediately.

• If the leaked refrigerant comes in contact with fire, noxious gas may generate.

• After the installation work, confirm that refrigerant does not leak.

• If refrigerant gas leaks into the room and flows near to a source of fire, noxious gas may be generated.

REQUIREMENT

When using long length of refrigerant piping. Provide support brackets at intervals of 2.5 m to 3 m. If the pipes are not fixed abnormal sounds may be generated.

Ensure the supplied R410A flare nuts are used.

Permissible pipe length and permissible height difference

This differs depending on the outdoor units. For details, refer to the Installation Manual supplied with the outdoor unit.

Piping material and dimensions

Piping material

Indoor unit capacity type MMU-

Pipe size (mm)

• Use new and clean pipe, ensuring that the pipes are not contaminated with dust, oil, moisture, etc.

Gas side Liquid side

Pipe flaring

Phosphor deoxidization seamless pipe for air conditioner

AP0071 to AP0121 type AP0151 to AP0181 type

Ø9.5 Ø12.7 Ø6.4 Ø6.4

Insert the leading part of the hose between the heat exchanger and the drain pan, and then bend it downward.

Polyethylene hand pump for pouring water in drain pan

Vessel

Water (1500cc to 2000cc)

Flaring

1. Cut the pipe with a pipe cutter.

2. Place flare nut onto the pipe, and flare the pipe. (Use the flare nut fitted to the unit or one that is R410A compatible)

As the flaring sizes of R410A differ from that used on R22. It is recommended to use a dedicated R410A flaring tool. However a conventional flare tool can be used, by adjustment of the projection of the copper pipe.

• Flaring diam. meter size : A (Unit : mm)

Outer diam. of copper pipe

6.4

9.5

12.7

15.9

In case of flaring for R410A with the conventional

flare tool, make a margin of 0.5 mm longer than that of R22 pipe so that the flare size matches with the specified size.

The copper pipe gauge is useful for adjusting the projection margin size.

- 0.4

R410A

9.1

13.2

16.6

19.7

Page 26

REFRIGERANT PIPING

ELECTRIC WORK

• Projection margin in flaring : B (Unit : mm)

Rigid (Clutch type)

Outer diam. of

copper pipe

6.4

9.5

12.7

15.9

Imperial (Wing nut type)

Outer diam. of copper pipe

R410A tool used

R410A R22

0 to 0.5 (Same as left) 0 to 0.5 (Same as left) 0 to 0.5 (Same as left) 0 to 0.5 (Same as left)

6.4

9.5

12.7

15.9

Conventional tool used

R410A R22

1.0 to 1.5 0.5 to 1.0

R410A R22

1.5 to 2.0 1.0 to 1.5

2.0 to 2.5 1.5 to 2.0

Connection of refrigerant pipe

Connect all the refrigerant pipes with the flare connection method

• As the unit is sealed to atmospheric pressure.

It is not abnormal that no “Push....” sound will be

heard upon the removal of the flare nut.

• Ensure use of two spanners for the connecting of the pipe work to the indoor unit.

Airtight test/Air purge, etc.

For carrying out airtight test, air purge, gas leak check and addition of refrigerant refer to the Installation Manual supplied with the outdoor unit.

Open fully valves of the outdoor unit

Gas leak check

Using a leak detector or soapy water, check for gas leaks at the connecting pipe work and the caps on the service valves.

REQUIREMENT

Use a leak detector designed specifically for HFC refrigerant (R410A, R134a, etc.).

Heat insulating process

Fit heat insulation to the gas and liquid pipes separately.

During cooling mode, the temperature of the liquid and the gas pipes are reduced. Therefore ensure sufficient insulation is fitted to prevent dew condensation.

• On the gas side ensure that the heat insulation used is heat resistant to a minimum temperature of 120°C

• Using the supplied heat insulation. Insulate the interconnecting parts of the indoor unit, ensuring that there is no exposure of any refrigerant pipe work. As detailed in the illustration below.

REQUIREMENT

Apply the thermal insulation to the pipe connecting section of the indoor unit securely up to the root without exposure of the pipe. (The pipe exposed to the outside causes water leak.)

WARNING

1. Using the specified wires, ensure the wires are connected and securely fixed so that no external force can transmit to the connecting part of the terminals.

Poor connection may cause risk of fire, etc.

2. Ensure connection of earth wire. (Grounding work)

Do not connect the earth wire to a gas pipe, mains water pipe, lightning rod, or the earth wire of a telephone. Incorrect earthing will cause risk of an electric shock.

3. For electrical installation work, strictly follow the Local and national Regulations of each country and the Installation Manual. A designated power supply must be used.

Capacity shortage of the power supply or incomplete installation may cause an electric shock or a fire.

CAUTION

Ensure an earth leakage breaker is installed.

Failure to install, may result in an electric shock.

REQUIREMENT

• For power supply wiring, strictly conform to the Local authorities in each country.

• For wiring of the power supply of the outdoor units, follow to the outdoor unit Installation Manual.

• Never connect 220–240V control wiring to the terminal blocks (U1, U2, A, B) fault will be. (Caused.)

• Arrange the electrical wiring so that they do not come into contact with high-temperature parts of the pipe

work; this is to prevent the risk of insulation melting and causing a possible accident.

• After connecting wires to the terminal block. Secure wiring with cable clamp.

• Store wiring install control wiring and refrigerant piping within the same line.

• Do not turn on power of the indoor unit until vacuuming of the refrigerant pipe has finished.

Work using double spanner

• Refer to the following table for tightening torque.

Connecting pipe

outer dia. (mm)

Ø6.4

Ø9.5

Ø12.7

Ø15.9

Tightening torque

(N•m)

14 to 18

(1.4 to 1.8 kgf•m)

33 to 42

(3.3 to 4.2 kgf•m)

50 to 62

(5.0 to 6.2 kgf•m)

68 to 82

(6.8 to 8.2 kgf•m)

Re-tightening

torque (N•m)

(1.8 kgf•m)

(4.2 kgf•m)

(5.0 kgf•m)

(6.8 kgf•m)

Main unit

Attached heat insulating pipe

Set notching upward.

Pipe side (Required at the site)

Page 27

P.C. board

Cover of electric parts box

Hooking section

Screw

Screws

Electric parts box

Thermal insulation to cabling connecting port

(L)

(N)

Earth line

Connecting cord

R(L) S(N)

Cord clamp Heat insulator B

Heat insulator A

Indoor/Outdoor crossover cable/ Remote controller terminal block

Power supply terminal block

U1U2A B

Adhered surface

Notched section

ELECTRIC WORK

Power supply specifications

Power supply wiring and communication wiring are to be procured locally. For the power supply specification, follow the table below. Ensure power supply is adequate. An insufficient power

supply could result in unit failure. For specification of the power capacity of the outdoor unit and the power supply wires, refer to the Installation

Manual supplied with the outdoor unit.

Indoor unit power supply (*1)

Communication line

Indoor unit power supply (*1)

• Indoor unit power supply, must have a dedicated supply and be separate to that of the outdoor unit.

• Arrange the power supplies to the indoor and outdoor units, so that a common earth leakage breaker and main switch can be used.

• Power supply cable specification : Cable 3-core 2.5 mm², in conformity with Design 60245 IEC 57.

Indoor/Outdoor inter-unit wiring, Central controller wiring (*2) (*3)

• Use a 2 core non polarity cable.

• To prevent any possible noise issues, use a shielded 2 core wire.

• The total stated length of communication wiring is determined by the interconnecting length of indoor to outdoor cable plus the length of the central control communication cable.

Remote controller wiring (*4)

• For wiring remote controllers, a 2 core polarity cable must be used.

Remote controller wiring, remote controller inter-unit wiring

Total wire length of remote controller wiring and remote controller inter-unit wiring = L + L1 + L2 + … Ln

Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln

Remote controller wiring

Power supply Power supply switch/Earth leakage breaker or power supply wiring/fuse rating for indoor

units should be selected by the accommodated total current values of the indoor units. Power supply wiring

Indoor/Outdoor inter-unit wiring (*2)

Central control line wiring (*3)

Remote controller wiring (*4)

Indoor unit

Remote

controller

20 m or less Twist wire : 2.5 mm² 50 m or less Twist wire : 3.5 mm² Q’ty 2

Wire size Q’ty 2 Wire size Q’ty 2

Wire size Twist wire : 0.5 to 2.0 mm²

Twist wire: 0.5mm

In case of wired type only In case of wireless type included

Indoor unit

L1 L2 Ln

Remote controller inter-unit wiring

to 2.0 mm2 × 2

Up to 500 m Up to 400 m Up to 200 m

Indoor unit Indoor unit

220–240V, 1N ~ 50Hz

220V, 1N ~ 60Hz

(Up to 1000 m) Twist wire : 1.25 mm² (Up to 2000 m) Twist wire : 2.00 mm²

CAUTION

The remote controller wire (Communication line) and AC220– 240V (Power supply) wires cannot be parallel to contact each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise, etc.

(Max. 8 units)

Cable connection

REQUIREMENT

• Be sure to locate the cable through the cable connection port of the indoor unit.

• Ensure additional wire length of approximately 100 mm at the indoor unit electric parts box. This is to enable ease of any service work in the future.

• The low-voltage circuit is provided for the remote controller.

• Remove the cover of the electric parts box by removing the mounting screws (3 pcs.) and push the hooking section. (The cover of the electric parts box remains hanged to the hinge.)

• Tighten the screws on the terminal block and secure the cables with cord clamp fitted to the electric parts box. (Do not apply tension to the connecting section of the terminal block.)

• Using the supplied thermal insulation for the sealing of the cable connecting port, seal the cable connecting port. (Otherwise dew condensation may be caused.)

• Mount the cover of the electric parts box ensuring the cables are not pinched. (Mount the cover after the ceiling panel has been wired to the electric box.)

Page 28

ON / OFF

FAN

TEMP.

SWING/FIXTIME

MODE

VENT

UNITSET CL

FILTER RESET

TEST

TIMER SET

CODE No.

UNIT No.

R.C. No.

3 5

6 6

CODE No.

UNIT No.

R.C. No.

∗

∗∗

∗

∗∗∗∗∗

CODE No.

UNIT No.

SETTING

R.C. No.

ELECTRIC WORK

APPLICABLE CONTROLS

Remote controller wiring

• Strip approximately 14 mm of insulation off of the connecting wires.

• As the remote controller wire has no polarity, there is no problem if connections to indoor unit terminal blocks A and B are reversed.

Wiring diagram

Terminal block for remote controller wiring of indoor unit

A B

Remote controller wire (Field supply)

Terminal block

A B

Remote controller unit

When using the equipment for the first time, the remote controller will not accept any commands for a short period of time.

• Automatic address

• While automatic addressing no operations can be performed on the remote controller.

• Automatic addressing will take a maximum duration of 10 minutes (generally 5 minutes).

• Upon turning on the unit after completion of automatic addressing, a maximum period of 10 minutes (generally 3 minutes) are required prior to the start up operation of the outdoor unit.

All indoor units are shipped from factory as standard. Change if necessary.

NOTIFICATION

To change the setup use the main remote controller (wired remote controller).

Wiring between indoor and outdoor units

Outdoor power supply

Follower outdoor unit

U2U1 A B

Remote

controller

U1U2 U3 U4U5 U6

Indoor unit

Earth

Control wiring between outdoor units

Control wiring between indoor units

Indoor unit

Earth

LN U2U1 A B

Pull box

NOTE

An outdoor unit that is inter-connected to the indoor units automatically becomes the header unit.

Connection of shield wire closed terminal

Indoor unit

LN U2U1 A B

Remote controller

[Group control]

Pull box

Earth

Indoor power supply 220-240V, 1N ~50Hz 220V, 1N ~60Hz

Earth leakage

breaker

Power switch

Outdoor power supply

Earth

Indoor unit

Earth

Pull box

Header outdoor unit

U1U2 U3 U4U5 U6

Control wiring between indoor and outdoor units

U2U1 A B

Remote

controller

Address setup

Set up the addresses as per the Installation Manual supplied with the outdoor unit.

Wiring on the ceiling panel

As per the Installation Manual of the ceiling panel, connect the connector (2P: Red) of the ceiling panel to the connector (5P: White) onto the P.C. board within the electric parts box.

Cord Clamp

5P connector (White)

Wire from ceiling panel

* The setup change for wireless remote controller, sub remote controller or a unit without a controller (Centrally

controlled.) is not possible. In such cases, temporarily install a separate main remote controller.

Applicable control setup

Basic operation procedure for setup change

Change the setup while operation of the equipment is stopped. (Be sure to stop the operation of a set.)

Procedure

2 3

SET

Push the as shown in the figure.

Check that the displayed item code is [10].

• If the item code indicates any characters other than [10], push the button to erase the display and retry the operation from the first step. (For some time after the of the remote controller cannot be accepted.)

(In a group control, the firstly displayed indoor unit No. becomes the center unit.)

Each time the Select the indoor unit that requires a change to the setup. During this time the indoor unit that is selected can be

confirmed as the louver and fan will be operated.

TEMP.

Using

Using the

SET

Push the complete.

• To change the setup of an indoor unit that is not selected, restart operation from Procedure

• To change to a different setup within the selected indoor unit, restart operation from Procedure

Pushing the When the setup is finished, push the

Pushing the normal stopped status.

(For a period of time after the controller will not accept any commands.)

TES

, CL and

TIME

button. During this time, if the display changes from flashing to permanently on, the setup is

TES

buttons simultaneously for 4 seconds or more, after a while, the display part flashes

TES

button has been pushed, the operation

UNIT

button is pushed, the indoor unit No. in the group control is displayed consecutively.

the buttons, select the item code [**].

buttons, select set data [

button clears the set up contents which has been set. In this case, restart from Procedure 2.

button deletes the display and returns the status to the

TES

button has been pushed, the remote

Description

TES

(* The display changes according

****

button. (The setup is configured.)

to the indoor unit model.)

Page 29

APPLICABLE CONTROLS

In case of installation to high ceiling

When the unit is to be installed at a height that exceeds the standard value, adjustment to the air volume is necessary.

• For the “Setup data” in Procedure

, select from the “Installable ceiling height list”.

Installable ceiling height list

Indoor unit capacity type

Discharge direction

Standard (At shipment)

High ceiling (2) High ceiling (3)

0071 to 0121 type 0151 type 0181 type

4-way 3-way 2-way 4-way 3-way 2-way 4-way 3-way 2-way

2.7 ——2.9 ——3.2 —— ———3.2 ——3.4 —— ———3.5 ——3.5 ——

Setup of high ceiling

Setup data

0000 0002 0003

(Unit: m)

In case of remote controller-less (Group control)

To set the unit to high ceiling operation, there is a method that requires the changing of the short plugs on the indoor P.C. board. The details are shown in the below table.

This method is only to be used where a standard wired remote controller (Group control) is not used. ∗ Upon changing the high ceiling setting

• Select setting by the changing of the short plugs on the indoor P.C. board.

Short plug position

Short

CN112 CN111 CN110

Open

Set

data

0000

0003

Filter sold separately

Standard filter (At shipment)

High ceiling (3)

• Short plug position (CN112, CN111, CN110 from the left)

Change of lighting time of filter sign

Depending on the conditions of the installation, the time period of the filter clean sign can be changed.

Follow to the basic operation procedure

→ 2 → 3 → 4 → 5 → 6 ).

(

• For the item code in Procedure

• For the [Set data] in Procedure

, specify [01].

, select the setup data of filter sign lighting time from the following table.

Setup data

0000 0001 0002 0003 0004

Filter sign lighting time

None 150H 2500H (At shipment from factory) 5000H 10000H

Increased heating effect

If it is not possible to achieve satisfactory heating due to the installation environment or the structure of the room. The detected temperature can be increased. Also use a circulator, etc to circulate hot air near the ceiling.

Follow to the basic operation procedure

→ 2 → 3 → 4 → 5 → 6 ).

(

• For the item code in Procedure

• For the set data in Procedure data of the required temperature shift value from the table below.

Setup data

0000 0001 0002 0003 0004 0005 0006

Detection temp shift value

+1°C +2°C (At shipment from factory) +3°C +4°C +5°C +6°C

, specify [06].

, select the setup

No shift

Group control

In a group control, a remote controller can control up to a maximum of 8 units.

• For cabling procedure and cables of the individual line (Identical refrigerant line) system, refer to “Electric work” in this Manual.

• Wiring between indoor units in a group is performed in the following method.

Connect the indoor units by connecting the remote controller inter-unit cables from the remote controller terminal blocks (A, B) of the indoor unit connected with a remote controller to the remote controller terminal blocks (A, B) of the other indoor unit. (No polarity)

• For address setup, refer to the Installation Manual supplied with the outdoor unit.

Page 30

Receiver unit

M4 × 25 screw (2 pieces)

Small screw

Spacer

Notch

Nameplate

TEST RUN

Before test operation

• Before turning on the power supply, carry out the following procedures.

1) Using 500V-megger, check there is 1MΩ or more between the

terminal block of the power supply and the earth. If 1MΩ or less is detected, do not run the unit.

2) Check that all the valves of the outdoor unit are fully opened.

• Never push the electromagnetic contactor to carry out a forced test operation. (It is very dangerous because a protective device does not work.)

To protect the compressor at startup. Ensure the power supply is left on for 12 or more hours before operation.

WARNING

How to execute test operation

• To carry out a fan operation in a single indoor unit, firstly turn off the power supply to the unit. Then short CN72 found on the P.C. board. Once completed turn the power to the unit back on and start the unit in FAN only mode. Upon completion of the test do not forget to remove the short circuit on CN72.

• Using the remote controller, check the unit is in normal operation. For the operation procedure, refer to the supplied Owner’s Manual. A forced test operation can be executed in the following procedure under the condition of thermo.-OFF of room temperature. In order to prevent the test operation from running continuously, the operation will cease after a period of 60 minutes. The unit will then return back to its original operation.

NOTE

Do not use a forced operation in cases other than test operation because it applies an excessive load onto the air conditioner.

In case of wired remote controller

Procedure

1, 5

Description

FILTER RESET

TEMP.

TEST

TIMER SET

ON / OFF

2, 4

FAN

MODE

SWING/FIXTIME

VENT

UNITSET CL

In case of wireless remote controller

Procedure

Remove a small screw which fixes the nameplate of the receiver unit. Remove the nameplate of the sensor section by inserting a minus screwdriver, etc into the notch at the bottom

of the plate, and set the Dip switch to [TEST RUN ON].

Execute a test operation with button on the wireless remote controller.

, , and LED flash during test operation.

•

• Under status of [TEST RUN ON], the temperature adjustment from the wireless remote controller is invalid. Do not use this method in the operation other than test operation because the equipment is damaged.

Use either COOL or HEAT operation mode for a test operation.

* The outdoor unit does not operate approx. 3 minutes after power-ON and operation stop.

After the test operation finished, stop the air conditioner from the wireless remote controller, and return Dip switch of the receiver section as before.

(A 60-minutes timer clearing function is attached to the receiver section in order to prevent a continuous test operation.)

Description

TES

Keep the [TEST] is displayed on the display part and the selection of the test mode is

permitted.

Push

Using

• Do not run the air conditioner in a mode other than [COOL] or [HEAT].

• The temperature controlling function will not work during the test operation.

• Fault detection will perform as usual. After the test operation, push the

(Display part is the same as procedure

Push the ([TEST] disappears on the display part and the status returns to normal.)

button pushed down for 4 seconds or more.

ON / OFF

button.

MODE

button, select the operation mode, [COOL] or [HEAT].

ON / OFF

button to stop the operation.

)

TES

button to cancel (release from) the test operation mode.

TEST

Page 31

TROUBLESHOOTING

Confirmation and check

When a fault occurs in the air conditioner, the check code and the indoor unit No. will appear on the display part of the remote controller.

The check code will only be displayed while the unit is in operation.

If the display disappears, operate the air conditioner according to the following “Confirmation of error history” for confirmation.

Confirmation of error history

When a fault occurs in the air conditioner, the error history can be confirmed with the following procedure. (The error history is stored in memory and can contain up to 4 errors).

This history can be confirmed from either the operating status or the stop status.

Procedure

SET

When pushing the or more, the display similar to the one shown in the figure to the right will appear.

If [Service Check] is displayed, the fault code will be stored in the error history mode.

• 01 (Order of error history) is displayed in CODE No. window.

• Check Code is displayed in the CHECK window.

• The indoor unit address, where the fault has occurred will be displayed in the UNIT No. window.

When pushing the chronological order.

The numbers displayed within the CODE No. window can vary between 1 and 4. 1 being the most recent fault

and 4 being the oldest.

CAUTION

Do not push the

After confirmation, push the

TES

and

buttons simultaneously for 4 seconds

TEMP.

buttons, the error history stored within the memory will be displayed in

button as this will erase all of the error history for that indoor unit.

TES

button. This will return the display back to its original mode.

Description

CODE No.

UNIT No.

R.C. No.

Check code Indoor unit No. in which

TEMP.

FILTER RESET

TEST

an error occurred

TIMER SET

ON / OFF

FAN

MODE

SWING/FIXTIME

VENT

UNITSET CL

UNIT No.

R.C. No.

CODE No.

Check method

On the remote controller (Main remote controller, Central control remote controller) and the interface P.C. board of the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a fault and the location of this fault within the air conditioning system can be located, as shown in the table below.

Check code list

The following list shows each check code. Find the check contents from the list according to part to be checked.

• In case of a fault from the indoor remote controller: See “Main remote controller display” in the list.

• In case of a fault from the outdoor unit: See “Outdoor 7-segment display” in the list.

• In case of a fault from the indoor unit with a wireless remote controller: See “Sensor block display of receiving unit” in the list.

Terminology

Check code Wireless remote controller

Main

remote

controller

display

E01 ——

E02 ——

E03 ——

E04 ——

E06 E06

— E07 —

E08 E08 Duplicated indoor addresses E09 —— E10 ——

E12 E12

E15 E15 —

E16 E16

E18 ——

E19 E19

E20 E20

E23 E23 — E25 E25 —

E26 E26

E28 E28 Detected outdoor unit number

E31 E31

Outdoor 7-segment dis p lay

Auxiliary code

No. of indoor units in which sensor has been normally received

01: Indoor/Outdoor communication 02: Communication between ou td oo r units

00: Capacity over 01 ~: No. of connected units

00: Header is nothing 02: Two or more header units

01: Outdoor of other line connected 02: Indoor of other line connected

No. of outdoor units which received signal normally

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 error 04: Fan IPDU error 05: IPDU + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error

IPDU : Intelligent Power Drive Unit

¡ : Lighting,

ALT. : Flashing is alternately when there are two flashing LED. SIM : Simultaneous flashing when there are two flashing LED.

Sensor block display

of receiving unit

Operation

Timer Ready Flash

¤ ¤ ¤

ll ll

¤ ¤ ¤

ll ll ll

¤ ¤

: Flashing, l : Goes off

Check code name Judging device

Communication error between indoor and remote controller (Detected at remote controller side)

Remote controller transmission error Remote controller Communication error between indoor and remote

controller (Detected at indoor side) Communication c ir cu it error between indoor/outdoor

(Detected at indoor side)

Decrease of No. o f indoor units I/F

Communication c ir cu it error between indoor/outdoor (Detected at outdoor side)

Duplicated indoor addresses Indoor / I/F Duplicated main remote controllers Remote controller Communication error between indoor MCU Indoor

Automatic address start error I/F

Indoor is nothing during automatic addressing I/F

Capacity over / No. of connected indoor units I/F

Communication error between indoor units Indoor

Outdoor header units quantity error I/F

Other line connected du ring automati c ad dress I/F

Sending error in communication between outdoor units I/F Duplicated follower outdoor addresses I/F

Decrease of No. o f c onne cted outdoor units I/F

Follower outdoor un it error I/F

IPDU communication error I/F

Remote controller

Indoor

I/F

Page 32

TROUBLESHOOTING

Main

remote

controller

display

F01 —— F02 —— F03 —— F04 F04 — F05 F05 — F06 F06 — F07 F07 — F08 F08 — F10 —— F12 F12 —

F13 F13

F15 F15 — F16 F16 — F23 F23 — F24 F24 — F29 —— F31 F31 —

H01 H01

H02 H02

H03 H03

H04 H04 — H06 H06 — H07 H07 —

H08 H08

H14 H14

H16 H16

L03 —— L04 L04 —

L05 ——

L06 L06 No. of indoor units with priority L07 ——

L08 L08 — L09 —— L10 L10 — L20 L20 — L28 L28 —

L29 L29

L30 L30 Detected indoor address

— L31 ——Extended I/C error I/F

Check code Wireless remote controller

Outdoor 7-segment dis p lay

Auxiliary code

01: Comp. 1 side 02: Comp. 2 side

01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error

01: TK1 oil circuit system error 02: TK2 oil circuit syst e m er ror 03: TK3 oil circuit system error 04: TK4 oil circuit system error

01: IPDU1 error 02: IPDU2 error 03: IPDU3 error 04: Fan IPDU error 05: IPDU1 + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error

—

Sensor block display

of receiving unit

Operation

Timer Ready Flash

¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤

¤¤ ¤¤

¤¤ ¤¤ ¤¤ ¤¤ ¤¤

Check code name Judging device

ALT Indoor TCJ sensor error Indoor

ALT Indoor TC2 sensor error Indoor

ALT Indoor TC1 sensor error Indoor

ALT TD1 sensor error I/F

ALT TD2 sensor error I/F

ALT TE1 sensor error I/F

ALT TL sensor error I/F

ALT TO sensor error I/F

ALT Indoor TA sensor error Indoor

ALT TS1 sensor error I/F

ALT TH sensor error IPDU

ALT Outdoor temp . sensor miscablin g (TE , TL) I/F

ALT Outdoor pressure sensor misca blin g (Pd, Ps) I/F

ALT Ps sensor error I/F

ALT Pd sensor error I/F

SIM Indoor other error Indoor

SIM Indoor EEPROM error I/F

l l l

¤ ¤

¤ ¤ ¤ ¤ ¤ ¤

¤ ¤

Compressor break down IPDU

Magnet switch e rr or Overcurrent re lay operation Compressor tro uble ( loc k)

Current detect circuit system error IPDU

Comp 1 case thermo op era tio n I/F Low pressure protec tive oper atio n I/F Oil level down de tec t iv e pro t ec tio n I/F

Oil level detect ive te mp sen sor error I/F

Comp 2 case thermo op era tio n I/F

Oil level dete ct iv e cir c u it err o r Magnet switch e rr or Overcurrent re lay operation

SIM Indoor center unit duplicated Indoor SIM Outdoor l ine ad d res s duplicated I/F

Duplicated indo or un it s with priority

SIM

(Displayed in in do or u ni t w ith pr ior ity) Duplicated indo or un it s with priority

SIM

(Displayed in un it other than indoor unit with pri ori ty ) SIM Group line in indi vid ua l ind oor unit Indoor SIM Indoor group/Address unset Indoor, I/F SIM Indoor capacity unset Indoor SIM Outdoor capa city unset I/F SIM Duplicated central control addresses Indoor SIM Over No. of connec ted ou tdoo r un i ts I/F

SIM No. of IPDU error I/F

SIM Indoor outside interlock Indoor

MG-SW

Overcurrent re la

IPDU

I/F

MG-SW

Overcurrent re la y

I/F

Main

remote

controller

display

P01 —— P03 P03 —

P04 P04

P05 P05

P07 P07

P10 P10 Detected indoor address P12 —— P13 P13 —

P15 P15

P17 P17 — P19 P19 Detected outdoor unit number P20 P20 —

P22 P22

P26 P26

P29 P29

P31 P31 —

Check code Wireless remote controller

Outdoor 7-segment dis p lay

Auxiliary code

01: Comp. 1 side 02: Comp. 2 side

01: Phase-mi ssi ng detectio n 02: Phase error

01: Comp. 1 side 02: Comp. 2 side

01: TS condition 02: TD condition

0[: IGBT short 1[: Fan motor position detective circuit error 3[: Fan motor trouble

: TH sensor temp. error

[

(Heat sink overheat)

D[: TH sensor error

: Vdc output error

[

01: Comp. 1 side 02: Comp. 2 side

Sensor block display

of receiving unit

Operation

Timer Ready Flash

¤¤

Check code name Judging device

ALT Indoor fan motor error Indoor ALT Discharge temp. TD1 error I/F

ALT High-pressure SW system operation IPDU

ALT Phase- mis sin g det ec ti o n /P ha se e rro r I/F

ALT Heat sink overheat error IPDU, I/F

ALT Indoor overflow error Indoor ALT Indoor fan motor error Indoor ALT Outdoor liqu id back detection error I/F

ALT Gas leak detec tion I/F

ALT Discharge temp. TD2 error I/F

ALT 4-way valve inverse error I/F

ALT High-pre ss ure pr o te ct ive operation I/F

ALT Outdoor fan IPDU error IPDU

ALT G-TR short protection error IPDU

ALT Comp position detective circuit system error IPDU

ALT Other indoor u ni t e rror (G roup te r mina l u nit e rror ) Indoor

Error detected by TCC-LINK central control device

Central control

device

indication

C05 —— —Sending error in TCC-LINK c entr al c ontr o l device TCC-LINK C06 —— —Receiving error in TCC-LINK central control device TCC-LINK

C12 —— —

P30

Check code Wireless remote controller

Outdoor 7-segment dis p lay

Auxiliary code

Differs according to error contents of unit with occurrence of alarm Group control branching unit error

—— (L20 is displayed.) Duplicated central control addresses

Sensor block display

of receiving unit

Operation

Timer Ready Flash

Batch alarm of interface

Check code name Judging dev ice

eneral-purpose equipment control

General-purpo se eq u ip me nt

Terminology

TCC-LINK : TOSHIBA Carrier Communication Link.

I/F

TCC-LINK

Page 33

FILTER RESET

Strap to prevent falling

Air filter

Push

Insert

Insert in the flap sagging down the center downward.

TROUBLESHOOTING

MAINTENANCE

New check code

1. Difference between the new check code and the current system

The displaying method of the check code will change from this model onwards.

New check code

Used characters Characteristics of code classification

Block display

Display on wired remote controller

• [ ] goes on.

• [UNIT No.] + Check code + Operation lamp (Green) flash

Display on sensor part of wireless remote controller

• Block display will show a combination of ] [ ] [ ] symbols.

[

Display on 7-segment in outdoor unit

• Unit No. and check code are displayed.

• In case of error the auxiliary code, check code and sub-code

are displayed alternately.

2. Special mention

• When the air conditioner stops and the error is cleared, the check code display on the remote controller will also disappear.

However, if the error continues after the unit has been stopped, the check code will immediately be displayed when the unit is restarted.

Alphabet + Decimal notation, 2 digits Many classification of communication/incorrect setup system Communication/Incorrect setup (4-ways), Indoor protection, Outdoor protection,

Sensor, Compressor protection, etc.

          

→

Display

Unused

Central control system error

Communication system error

Each sensor error (Failure)

Compressor protective system error

Unused

Setup error, Other errors

Protective device operation

Classification

Prior to maintenance, ensure the power supply is turned off.

CAUTION

Do not handle the buttons with wet hands as this will cause the risk of electric shock.

Daily maintenance

Cleaning of air filter

If is displayed on the remote controller, maintenance to the air filter is required.

Clogging of the air filter decreases cooling/heating efficiency.

After cleaning, push the

display disappears.

[4-way Air Discharge Cassette Type]

Open the air inlet grille.

• Slide the air inlet grille buttons to detach the air inlet grille from the main ceiling panel. Lower the grille slowly while holding.

Take out the air filter.

• Push the extrusion of the air filter away from the grille and remove.

Cleaning with water or vacuum cleaner

• If dirt is heavy, clean the air filter using tepid water with a neutral detergent or just water.

• After cleaning with water, dry the air filter sufficiently in a shaded place.

4 5

Mount the air filter. Close the air inlet grille.

• Close the air inlet grille, slide the button to locate into the ceiling panel fixing securely.

Push the

• display disappears.

1, 2

TEMP.

FILTER

TEST

RESET

Air inlet grille

TIMER SET

CODE No.

ON / OFF

FAN

MODE

SWING/FIXTIME

VENT

UNITSET CL

Air inlet grille

Button

Cleaning of air outlet flap

The air outlet flap can be removed to clean if necessary.

Remove the air outlet flap.

• Holding both ends of the air outlet flap, remove it by sagging the center downwards.

Clean the air outlet flap with water.

• If dirt is heavy, clean the air outlet flap using tepid water with neutral detergent or just water.

Mount the air outlet flap.

• First push in the one side, and insert the opposite side by sagging the center downwards.

Be careful to insert the flap in the correct direction.

Insert the flap with the printed mark facing upwards, and the arrow on the flap pointing in the outward direction.

Button

Page 34

4. REFRIGERATING CYCLE DIAGRAM

Gas sideLiquid side

Strainer

Pulse Motor

Valve (PMV)

Sensor

(TC2)

Capillary tube

Strainer

Sensor

(TCJ)

Air heat exchanger

at indoor side

Fan

Sensor

(TA)

Sensor

(TC1)

Fan motor

Functional part name

Pulse Motor Valve PMV

Temp. sensor 1. TA

2. TC1

3. TC2

4. TCJ

Functional outline

(Connector CN082 (6P): Blue)

1) Controls super heat in cooling operation

2) Controls under cool in heating operation

3) Recovers refrigerant oil in cooling operation

4) Recovers refrigerant oil in heating operation (Connector CN104 (2P): Yellow)

1) Detects indoor suction temperature (Connector CN100 (3P): Brown)

1) Controls PMV super heat in cooling operation (Connector CN101 (2P): Black)

1) Controls PMV under cool in heating operation (Connector CN102 (2P): Red)

1) Controls PMV super heat in cooling operation

Page 35

5. CONTROL OUTLINE

5-1. Control Specifications

No.

Power supply is reset.

2 Operation

select

Outline of specifications

1. Distinction of outdoor unit When the power supply is reset, the outdoor units are

distinguished, and control is exchanged according to the distinctive results.

2. Check code clear When the power supply is reset, the check code is also reset

once. If an abnormal status which the check code appears after Start/Stop button of the remote controller has been pushed continues, the check code is displayed again on the remote controller.

1. Based upon the operation select command from the remote controller or central controller, the operation mode is selected.

Remote controller

command

STOP

FAN

COOL

DRY

HEAT

COOL/HEAT AUTO

Heating operation is automatically selected with difference between setup temperature and room temperature.

Control outline

Stops air conditioner.

Fan operation

Cooling operation

Dry operation

Heating operation

COOL/HEAT AUTO operation

RemarksItem

3 1. Adjustment range, set temperature on remote controller (°C)

Room temp. control

Wired type Wireless type

2. From the item code 06, the setup temperature in heating operation can be corrected.

Setup data Setup temp. correction

Setup at shipment

Setup data 2

4 Automatic

capacity control

Air volume

5 1. By the command from the remote controller, “HIGH ”,

control

1. Based upon difference between Ta and Ts, the operation frequency is indicated to the outdoor unit.

“MED executed.

2. While air speed is in AUTO mode, the air speed is changed according to the difference between Ta and Ts.

”, or “LOW ” and “AUTO ” operation is

All cooling

18 to 29°C 18 to 30°C

0246

+0°C +2°C +4°C +6°C

All heating

18 to 29°C 16 to 30°C

Heating suction temperature shift

TS: Set temperature Ta: Room temperature

Page 36

No.

Item

Outline of specifications

Remarks

Prevention of cold air discharge

7 Freeze

prevention control (Low temp. release)

1. In all heating operation, the upper limit of the fan tap is set by one with higher temperature of TC2 sensor and TCJ sensor.

• When B zone has continued for 6 minutes, the operation

shifts to C zone.

• In defrost time, the control point is set to +6°C.

(˚C)

32 30 28 26

D C

A zone: OFF B zone:

Over 26˚C, below 28˚C, ULTRA LOW C zone:

Over 28˚C, below 30˚C, LOW D zone:

Over 30˚C, below 32˚C, MED E zone: HIGH

20 16

B A

1. In all cooling operation, the air conditioner operates as described below based upon temp. detected by TC1, TC2 and TCJ sensors.

To prevent the heat exchanger from freezing, the operation stops.

• When “J” zone is detected for 5 minutes, the command

frequency becomes “S0” to the outdoor unit.

• In “K” zone, the timer count is interrupted, and held.

• When “1 ” zone is detected, the timer is cleared and the

operation returns to the normal operation.

• When the command frequency became S0 with continua-

tion of “J” zone, operation of the the indoor fan in LOW mode until it reaches the “1 ” zone.

It is reset when the following conditions are satisfied.

• In D and E zones, priority is given to remote controller air speed setup.

• In A “

” is displayed.

Reset conditions

1) TC1

12°C and TC2 > 12°C and TCJ > 12°C

2) 30 minutes passed after stop.

(˚C)

TC1

10°C (5°C)

0°C

TC2, TCJ

–10°C –14°C

2. In all cooling operation, the air conditioner operates as described below based upon temp. detected by TC2 and TCJ sensors.

• When “M” zone is detected for 45 minutes, the command

frequency becomes “S0” to the outdoor unit.

• In “N” zone, the timer count is interrupted and held.

• When shifting to “M” zone again, the timer count restarts

and continues.

• If “L” zone is detected, the timer is cleared and the opera-

tion returns to normal operation.

Reset conditions

1) TC1

12°C and TC2 > 12°C and TCJ > 12°C

2) 30 minutes passed after stop.

(˚C)

P2 Q2

L N

P2 Q2

TC2, TCJ

5°C

–2.0°C

( ) value:

When the power supply is turned on, the Forced thermo becomes OFF if the temperature is less than this indicated temperature.

∗ In a Model without TC2,

TC2 is not judged.

Page 37

No.

Item

Outline of specifications

Remarks

Recovery control for cooling refrigerant and oil

Recovery control for heating refrigerant and oil

Short intermittent operation compensation control

1. The indoor unit which stops operation, thermostat is OFF, or operates in FAN mode opens PMV of the indoor unit by the specified opening degree when cooling refrigerant or oil recovery signal is received from the outdoor unit.

2. Drain pump of Compact 4-way Air Discharge Cassette type operates during recovery control mode.

The indoor unit which stops operation, thermostat is OFF, or operates in FAN mode performs the following controls when the heating refrigerant/Oil recovery signal is received from the outdoor unit.

1. Opens PMV of the indoor unit by the specified opening degree.

2. Stops the fan.

3. Compact 4-way Air Discharge Cassette type air conditioner rotates the indoor fan with Ultra Low Fan operation for approx. 1 minute after recovery control.

4. After recovery control, drain pump of Compact 4-way Air Discharge Cassette type will operate.

1. For 5 minutes after the operation has started, the operation is continued even if entering thermostat-OFF condition.

2. However, if the thermostat has been turned off by changing the set up temp., the thermostat is OFF with even the above condition. The protective control has priority.

• Recovery operation is usually executed every 2 hours.

• In the indoor unit which thermostat is OFF, or operates in FAN mode,

“

” lamp goes on.

• Recovery operation is

usually executed every 1 hour.

(In this time the flap directs upward)

Drain pump control

12 Elimination of

remaining heat

13 Auto flap control 1. When the flap signal has been received from the remote

14 Filter sign display

(None in wireless type)

∗ Provided in the

separately laid type TCB-AX21E.

1. During “COOL” operation (including DRY operation), the drain pump operates.

2. While the drain pump operates, if the float switch works, the drain pump continues operation and a check code is displayed.

3. While the drain pump stops, if the float switch works, turn off the capacity demand command, stop the operation, and operate the drain pump. If the float switch continues operating for approx. 5 minutes, the operation stops and the check code is displayed.

1. When the air conditioner stops in the “HEAT” mode, drive the indoor fan with “LOW” mode for approx. 30 seconds.

controller, the louver operates if the indoor fan is operating.

2. In Compact 4-way Air Discharge Cassette type, the discharge flap automatically directs upward if the operation stops.

3. In Compact 4-way Air Discharge Cassette type, the discharge flap directs upward if the heating operation is being prepared.

1. The operation time of the indoor fan is integrated and stored in memory, and the filter exchange signal is sent to the remote controller to display on the remote controller LCD after the specified time.

2. When the filter reset signal is received form the remote controller, time of the integrated timer is cleared. In this time, if the specified time has passed, the measured time is reset and LCD display disappears.

Check code [P10]

Page 38

No.

Item

Outline of specifications

Remarks

“ ” and “ ” display (Operation and heating stand-by)

<Operation standby> .......... Display on remote controller

1. •“P05” is one of displays of power wire missing.

•“P05” of power cable is detected.

•“COOL/DRY” operation cannot be performed because the other indoor unit is under “HEAT” operation.

•“HEAT” operation cannot be performed because COOL

priority is set (Outdoor I/F P.C. board SW11 1-bit is ON) and the other indoor unit is under “COOL/DRY” operation.

•“FAN” operation cannot be performed because the system performs “Heat oil/Refrigerant recovery” operation.

• There is a unit in which indoor overflow “P10” is detected.

• There is a unit in which interlock alarm “P23” is detected.

2. The above indoor units unavailable to operate waits under condition of thermostat OFF.

<HEAT standby> .................. Display on remote controller

1. • During HEAT operation, the fan rotates with lower air speed

than one specified in order to prevent discharge of cold draft or stops. (including case that defrost operation is being performed)

•“HEAT” operation cannot be performed because COOL

priority is set (Outdoor I/F P.C. board SW11 bit 1 is ON) and the other indoor unit is under “COOL/DRY” operation.

2. “HEAT standby” is displayed until the above conditions are

released.

•“ ” goes on.

•“

” goes on.

16 Selection of

central control mode

1. The contents which can be changed on the remote controller at indoor unit side can be selected by setup at the central controller side.

2. In case of operation from TCC-LINK central controller (TCB-SC642 TLE2, etc.)

[Central control mode 1] : Cannot operate [Central control mode 2] :

Cannot operate, stop, select mode, set up temp. [Central control mode 3] :

Cannot select mode, set up temp. [Central control mode 4] : Cannot select mode

3. RBC-AMT31E (Wired remote controller) While mode is the central control mode, “

lights on the display part of the remote controller.

CENTRAL”

If operation is performed from the remote control “CENTRAL CONTROL” mode, the status is notified with receiving sound.

Page 39

6. APPLIED CONTROL

6-1. Setup of Selecting Function in Indoor Unit

(Be sure to Execute Setup by a Wired Remote Controller)

<Procedure> Execute the setup operation while the unit stops.

TEMP.

ON / OFF

TIMER SET

FAN

MODE

5 6

FIL TER RESET

TEST

SWING/FIXTIME

UNITSET CL

VENT

SET, CL

Push

The firstly displayed unit No. indicates the header indoor unit address in the group control. In this time, the fan of the selected indoor unit is turned on.

, and

TEST

buttons simultaneously for 4 seconds or more.

Every pushing displayed. In this time, the fan of the selected indoor unit only is turned on.

Specify the item code (DN) using the setup temperature and buttons.

Select the setup data using the timer time and buttons. (When selecting the DN code to “33”, change the temperature indication of the unit from “°C”

to “°F” on the remote controller.)

SET

Push

• To change the selected indoor unit, return to procedure 2 .

• To change the item to be set up, return to procedure 3 .

Pushing

button. (OK if display goes on.)

TEST

UNIT

button, the indoor unit numbers in the group control are successively

button returns the status to normal stop status.

Page 40

Table: Function selecting item numbers (DN)

(Items necessary to perform the applied control at the local site are described.)

Filter display delay timer

Dirty state of filter

Central control address

Specific indoor unit priority

Heating temp shift

Existence of [AUTO] mode

Follows operation mode of the header unit

Cooling only

Type

Item

Description

0000 : None 0001 : 150H 0002 : 2500H 0003 :5000H 0004 : 10000H

0000 : Standard 0001 : High degree of dirt (Half of standard time)

0001 : No.1 unit to 0064 : No.64 unit 0099 : Unfixed

0000 : No pr ior ity 0001 :Priority 0000 : No shift 0001 : +1°C

0002 : +2°C to 0010 : +10°C

(Up to +6 recommended)

0000 : Provided 0001 : Not provided (Automatic selection from connected outdoor unit)

0000 : Does not follow 0001 : Follows

0000 : Heat pump 0001 : Cooling only (No display of [AUTO] [HEAT])

0014: Compact 4-way Air Discharge Cassette

At shipment

0002 : 2500H

0000 : Standard

0099 : Unfixed

0000 : No priority 0002 : +2°C

(Floor type 0000: 0°C)

0001 : Not provided

0000 : Not provided

0000 : Heat pump

0014: Compact 4-way A/D only

Indoor unit capacity

Line address

Indoor unit address

Group address

Temp difference of [AUTO] mode selection COOL → HEAT, HEAT → COOL

Automatic restart of power failure

Selection of option/error input (CN70)

HA terminal (CN61) select

Ventilating fan control

TA sensor selection

Temperature unit select

High ceiling selection (Air volume selection)

0000 : Unfixed 0001 to 0034 0001 : No.1 unit to 0030 :No.30 unit 0001 : No.1 unit to 0064 :No.64 unit 0000 : Individual 0001 :Header unit of group

0002 : Follower unit of group 0000 : 0 deg t o 0010 :10 deg

(For setup temperature, reversal of COOL/HEAT by ± (Data value)/2)

0000 : None 0001 :Restart

0000 : Filter input 0001 : Alarm input (Air washer, etc.) 0002 : None

0000 : Usual 0001 :Leaving-ON prevention control 0002 : Fire alarm input

0000 : Unavailable 0001 :Available 0000 : Body TA sensor 0001 :Remote controller sensor 0000 : °C (at factory shipment)

0001 : °F [Compact 4-way Air Discharge Cassette type]

0000 : AP007 to AP012; Below 2.7m

AP015; Below 2.9m AP018; Below 3.2m

0002 : AP015; Below 3.2m

AP018; Below 3.4m

0003 : AP015, AP018; Below 3.5m

According to capacity type 0099 : Unfixed 0099 : Unfixed 0099 : Unfixed

0003 : 3 deg

(Ts±1.5)

0000 : None

0002 : None

0000 : Usual

(HA terminal) 0000 : Unavailable 0000 : Body TA sensor 0000 : °C

0000 : Standard

Timer set (Wired remote controller)

0000 : Available (Operable) 0001 : Unavailable (Operation prohibited)

0000 : Available

Page 41

TYPE

Indoor unit capacity

Item code [10]

Setup

data

0014

Compact 4-way Air Discharge Cassette

Type

Abbreviated

Model name

MMU-AP XXX MH

Item code [11]

Setup data

0001 0003 0005 0007 0009

Model

007 009 012 015 018

6-2. Applied Control in Indoor Unit

n Remote location ON/OFF control box (TCB-IFCB-4E)

[Wiring and setup]

• Use the exclusive connector for connection with the indoor control P.C. board.

• In a group control, the system can operate when connecting with any indoor unit (Control P.C. board) in the

group. However when taking out the operation/error signal from the other unit, it is necessary to take out from each unit individually.

(1) Control items

1) Start/Stop input signal : Operation start/stop in unit

2) Operation signal : Output during normal operation

3) Error signal : Output during alarm (Serial communication error or indoor/outdoor protective device) operation

(2) Wiring diagram using remote control interface (TCB-IFCB-4E)

Input IFCB-4E : No voltage ON/OFF serial signal Output No voltage contact f or operation, error display

Contact capacity: Belo w Max. AC240V 0.5A

Indoor control P.C. board

Start/Stop input

COM (GND)

Remote controller prohibition/clear input

Operation signal output

COM (+12V)

Error signal output

1 2 3 4 5 6

CN61

T10

(YEL)

Remote location ON/OFF control box

(TCB-IFCB-4E)

1 2 3 4

CN06

1 2 3 4 5 6

CN13

ON/OFF serial signal input

COM

Operation signal output

Power supply 220–240V,

Error signal output

50Hz

Page 42

n Ventilating fan control from remote controller

[Function]

• The start/stop operation can be operated from the wired remote controller when air to air heat exchanger or ventilating f an is installed in the system.

• The fan can be operated even if the indoor unit is not operating.

• Use a fan which can receive the no-voltage A contact as an outside input signal.

• In a group control, the units are collectively operated and they can not be individually operated.

(1) Operation

Handle a wired remote controller in the following procedure.

∗ Use the wired remote controller during stop of the system. ∗ Be sure to set up the wired remote controller to the header unit. (Same in group control) ∗ In a group control, if the wired remote controller is set up to the header unit, both header and follower units

are simultaneously operable .

Push concurrently

The unit No. displayed firstly indicates the header indoor unit address in the group control. In this time, the fan of the selected indoor unit turns on.

Every pushing

SET

+ CL +

UNIT

button, the indoor unit numbers in group control are displayed succes-

TEST

buttons for 4 seconds or more.

sively.

In this time, the fan of the selected indoor unit only turns on.

Using the setup temp or button, specify the item code !.

Using the timer time or button, select the setup data. (At shipment: )

The setup data are as follows:

Setup data

 

SET

Push

• To change the selected indoor unit, go to the procedure 2 ).

• To change the item to be set up, go to the procedure 3 ).

button. (OK if display goes on.)

Handling of operation of air to air heat exchanger or ventilating fan

Unavailable (At shipment)

Available

Pushing

(2) Wiring

CN32

FAN DRIVE

(2P WHI)

Indoor control

P.C. board

Note) Determine the cable length between the

TEST

returns the status to the usual stop status.

Relay (DC12V, procured locally)

121

indoor control P.C. board and the relay within 2m.

Outside control input of fan

To terminal

Compact 4-way Air Discharge Cassette type 4-way Air Discharge Cassette type 1-way Air Discharge Cassette type (2 series) Concealed Duct Standard type Slim Duct type Under Ceiling type High Wall type

Corresponds up to a relay in which rated current of the operation coil is approx. 75mA

Other type models: Correspond up to a relay in which rated current of the

operation coil is approx. 16mA (Does not correspond to a terminal block type relay on the market.)

  

model :

Page 43

n Leaving-ON prevention control

[Function]

• This function controls the indoor units individually . It is connected with cable to the control P.C. board of the indoor unit.

• In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the item code - is set to the connected indoor unit.

• It is used when the start operation from outside if unnecessary but the stop operation is necessary.

• Using a card switch box, card lock, etc, the forgotten-OFF of the indoor unit can be protected.

• When inserting a card, start/stop operation from the remote controller is allowed.

• When taking out a card, the system stops if the indoor unit is operating and start/stop operation from the

remote controller is forbidden.

(1) Control items

1) Outside contact ON : The start/stop operation from the remote controller is allowed. (Status that card is inserted in the card switch box)

2) Outside contact OFF : If the indoor unit is operating, it is stopped forcedly. (Start/Stop prohibited to remote controller) (Status that card is taken out from the card switch box)

∗ When the card switch box does not perform the above contact operation, convert it using a relay with b

contact.

(2) Operation

Handle the wired remote controller switch in the f ollowing procedure. ∗ Use the wired remote controller switch during stop of the system.

Push concurrently

Using the setup temp or button, specify the item code - .

Using the timer time or button, set  to the setup data. Push Push

SET

button.

TEST

button. (The status returns to the usual stop status.)

4 5

SET

+ CL +

(3) Wiring

CN61

T10

(YEL)

Indoor control P.C. board

Note) Determine the cable length between the indoor control P.C. board and the relay within 2m.

TEST

buttons for 4 seconds or more.

Relay (procured locally)

121

343

565

Power supply

Outside contact (Card switch box, etc: Procured locally)

n Power peak-cut from indoor unit

When the relay is turned on, a forced thermostat-OFF operation starts.

* In the figure, the contact indicates a status that the card is taken out.

• Wiring example CN73

EXCT

(2P plug: RED)

Indoor control P.C. board

121

Relay (procured locally)

Note) Determine the cable length between the indoor or outdoor control P.C. board and the relay within 2m.

Relay coil signal

Page 44

7. TROUBLESHOOTING

7-1. Troub leshooting Summary

1. Before troubleshooting

1) Applied models

S-MMS Multi type models

Indoor unit: MMX-APXXX, Outdoor unit: MMY-MAPXXXHT8, MMY-MAPXXXT7

Super Heat Recovery Multi type models

Indoor unit: MMX-APXXX, Outdoor unit: MMY-MAPXXXFT8

Mini-S-MMS Multi type models

Indoor unit: MMX-APXXX, Outdoor unit: MCY-MAPXXXHT, MCY-MAPXXXHT2D

2) Required tools / measuring devices

• Screwdrivers (Philips, Minus), spanner, radio pinchers, nipper, push pin for reset switch, etc.

• Tester, thermometer , pressure gauge, etc.

3) Confirmation before check (The following items are not troubles.)

No.

Compressor does not operate.

Indoor fan does not work.

Outdoor fan does not rotate, or fan speed changes.

Indoor fan does not stop.

Start/stop operation on remote

controller is unavailable.

Operation

——

Check items

• Is not delayed for 3 minutes? (3 minutes after compressor-OFF)

• Is not thermostat OFF?

• Is not the fan operating or timer?

• Is not the system initially communicating? Heating operation cannot be performed under condition of outside tempera-

ture 21°C or higher. Cooling operation cannot be performed under condition of outside tempera-

ture –5°C or lower.

• Is not the cold draft prevention being controlled in heating operation?

• Is not low cooling operation being controlled?

• Is not a defrost operation being performed?

• Is not after-heat elimination operation being controlled after heating operation?

• Is not auxiliary unit or remote control being operated?

• Is connecting wire of indoor unit or remote controller correct?

2. Troubleshooting procedure

When a trouble occurred, advance the check operation in the following procedure.

Trouble

Check the check display on the interface P.C. board of the outdoor unit.

Check position or part in which trouble occurred.

NOTE) While a check operation is performed, a malfunction of the microprocessor may be caused due to

condition of the power supply or the external noise. If there is any noise source, change wires of the remote controller and signal wires to shield wires.

Page 45

7-2. Check Method

On the remote controller (Main remote controller, Centr al control remote controller) and the interface P.C. board of the outdoor unit, a check display LCD (Remote controller) or 7-segment display (on the outdoor interface P.C. board) to display the operation is provided. Therefore the operation status can be known. Using this self-diagnosis function, a trouble or position with trouble of the air conditioner can be found as shown in the table below.

Check code list

The following list shows each check code. Find the check contents from the list according to part to be checked.

• In case of check from indoor remote controller: See “Main remote controller display” in the list.

• In case of check from outdoor unit: See “Outdoor 7-segment display” in the list.

• In case of check from indoor unit with wireless remote controller: See “Sensor block display of receiving unit” in the list.

IPDU: Intelligent Power Drive Unit ¡ : Lighting, ¤ : Flashing, l : Goes off ALT.: Flashing is alternately when there are two flashing LED. SIM: Simultaneous flashing when there are tw o flashing LED

Check code Wireless remote controlle r

Main

remote

controller

display

E01 ——

E02 ——

E03 ——

E04 ——

E06 E06

— E07 —

E08 E08 Duplicated indoor ad dre sse s E09 —— E10 ——

E12 E12

E15 E15 —

E16 E16

E18 ——

E19 E19

E20 E20

E23 E23 —

E25 E25 —

E26 E26

E28 E28 Detected outdoor un it nu mber

E31 E31

Outdoor 7-segment display

Auxiliary code

No. of indoor uni ts in w h ich s enso r h as been normally received

01: Indoor/Outdoor communication 02: Communication between out door un its

00: Capacity over 01 ~: No. of connected units

00: Header is nothing 02: Two or more header units

01: Outdoor of other line connected 02: Indoor of other line con nected

No. of outdoor un its w hich recei ved sign al normally

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 error 04: Fan IPDU error 05: IPDU + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error

Sensor block display

of receiving unit

Timer Ready Flash

Operation

¤ ¤ ¤

¤ ¤

¤ ¤ ¤ ¤

Check code name Judging device

Communication error betw ee n indoor and re mote controller (Detec ted at re mote contr ol ler si de)

Remote controller transmission error Remote controller Communication error betw ee n indoor and re mote

controller (Detecte d at indo or si de) Communication circu it err or betw ee n

indoor/outdoor (D ete cted a t indoor s ide )

Decrease of No. of indoor unit s I/F

Communication circu it err or betw ee n indoor/outdoor (D ete cted a t outd oor side )

Duplicated indoor ad dre sse s Indoor / I/F Duplicated main remote controllers Remote controller Communication error betw ee n ind oor M C U Indoor

Automatic addres s s tar t er ror I/F

Indoor is noth ing d ur ing au to ma tic addr es sing I/F

Capacity over / No . o f conn ected in door u nit s I/F

Communication error betw een ind oor un its Indoor

Outdoor header uni ts quant ity error I/F

Other line connected during auto matic addres s I/F

Sending error in commun icat ion be tw een outdoor units

Duplicated follow er outd oor add res ses I/F

Decrease of No. of connected out door uni ts I/F

Follower outdoor unit error I/F

IPDU communication error I/F

Remote controller

Indoor

I/F

Page 46

Check code Wireless remote controlle r

Main

remote

controller

display

F01 —— F02 —— F03 —— F04 F04 — F05 F05 — F06 F06 — F07 F07 — F08 F08 — F10 —— F12 F12 —

F13 F13

F15 F15 — F16 F16 — F23 F23 — F24 F24 — F29 —— F31 F31 —

H01 H01

H02 H02

H03 H03

H04 H04 — H06 H06 — H07 H07 —

H08 H08

H14 H14

H16 H16

L03 —— L04 L04 —

L05 ——

L06 L06 No. of indoor u nits w ith p rio rity L07 ——

L08 L08 — L09 —— L10 L10 — L20 L20 — L28 L28 —

L29 L29

L30 L30 Detected indoor address

— L31 ——Extended I/C error I/F

Outdoor 7-segment display

Auxiliary code

01: Comp. 1 side 02: Comp. 2 side

01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error

—

01: TK1 oil circuit system error 02: TK2 oil circuit system error 03: TK3 oil circuit system error 04: TK4 oil circuit system error

01: IPDU1 error 02: IPDU2 error 03: IPDU3 error 04: Fan IPDU error 05: IPDU1 + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error

Sensor block display

of receiving unit

Operation

Timer Ready Flash

¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤ ¤¤

¤¤ ¤¤

¤¤ ¤¤ ¤¤ ¤¤ ¤¤

Check code name Judging device

ALT Indoor TCJ se nsor er ror Indoor

ALT Indoor TC2 sen sor error Indoor

ALT Indoor TC1 sen sor error Indoor

AL T TD1 sensor error I/F

AL T TD2 sensor error I/F

ALT TE1 sensor error I/F

ALT TL sensor error I/F

ALT TO senso r e rror I/F

ALT Indoor TA sensor error Indoor

ALT TS1 sensor error I/F

ALT TH sensor erro r IPDU

AL T Outdoor temp. sen sor misc abling (T E, TL) I /F

AL T Outdoor pressure sensor miscablin g (Pd, Ps) I/F

ALT Ps sensor error I/F

ALT Pd sensor error I/F

SIM Indoor other error Indoor

SIM Indoor EEPROM error I/F

l l l

¤ ¤

¤ ¤ ¤ ¤ ¤ ¤

¤ ¤

Compressor break down IPDU

Magnet switch e rror Overcurrent relay opera ti on Compressor trouble (lo ck)

Current detect ci rcu it system error IPDU

Comp 1 case ther mo op era tion I/F Low pressure protecti ve operat ion I /F Oil level down de t ecti ve pro tect ion I/F

Oil level d e te ct ive temp sensor error I/F

Comp 2 case ther mo op era tion I/F

Oil leve l de te ct ive circuit error Magnet switch e rror Overcurrent relay opera ti on

SIM Indoor center unit dupl icated Indoor SIM Outdoor line addr es s dup licat ed I/F

Duplicated indoor un it s w ith pr ior ity

SIM

(Displayed in indo or u ni t w ith pr ior ity ) Duplicated indoor un it s w ith pr ior ity

SIM

(Displayed in uni t o ther th an in door unit w ith p ri ority ) SIM Group line in individual indoor unit Indoor SIM Indoor group/Addre ss un set Indoor, I /F SIM Indoor capacity unset Indoor SIM Outdoor capacity unse t I/F SIM Duplicated centra l control addresses Indoor SIM Over No. of con nec ted ou tdoo r un its I/F

SIM No. of IPDU error I/F

SIM Indoor outside int er loc k Indoor

MG-SW

Overcurrent rela

IPDU

I/F

MG-SW

Overcurrent relay

I/F

Page 47

Check code W i reless remote c ont rolle r

Main

remote

controller

display

P01 —— P03 P03 —

P04 P04

P05 P05

P07 P07

P10 P10 Detected indoor address P12 —— P13 P13 —

P15 P15

P17 P17 — P19 P19 Detected outdoor unit nu mber P20 P20 —

P22 P22

P26 P26

P29 P29

P31 P31 —

Outdoor 7-segment display

Auxiliary code

01: Comp. 1 side 02: Comp. 2 side

01: Phase-missing detection 02: Phase error

01: Comp. 1 side 02: Comp. 2 side

01: TS condition 02: TD condition

: IGBT short

[ [

: Fan motor position detective circuit error

: Fan motor trouble

[

C[: TH sensor temp. error (Heat sin k overhea t) D[: TH sensor error E

: Vdc output error

[

01: Comp. 1 side 02: Comp. 2 side

Sensor block display

of receiving unit

Timer Ready Flash

Operation

¤¤

Check code name

ALT Indoor fan motor error Indoor AL T Discharge temp. TD1 error I/F

ALT High-pressure SW syste m opera t ion IPDU

ALT Phase-missing detection /Phas e e rror I/F

ALT Heat sink overheat error IPDU, I/F

ALT Indoor overflow error Indoor ALT Indoor fan motor error Indoor ALT Outdoor liquid back detection error I/F

AL T Gas leak detection I/F

AL T Discharge temp. TD2 error I/F

AL T 4-way valve inverse er ro r I/F

ALT High-pressure protective op era tion I/F

ALT Outdoor fan IPDU error IPDU

ALT G-TR short protection error IPDU

ALT Comp position detective circuit system error IPDU

Other indoor unit error

ALT

(Group terminal unit error)

Judging

device

Indoor

Error detected by TCC-LINK central control device

Check code Wi reless remote cont rol ler

Central control

device

indication

C05 —— —Sending error i n TCC-LI NK c entr al contr ol de vice TCC-LINK C06 —— —Receiving error in TCC-LI NK centra l contr ol device TCC-LINK

C12 —— —

P30

Outdoor 7-segment display

Auxiliary code

Differs accor din g to e rror c ont ents o f uni t with oc cur ren ce o f alar m Group contr o l branching unit error

—— (L20 is displayed.) Duplicated cen tral con trol addresses

Sensor block display

of receiving unit

Timer Ready Flash

Operation

Check code name Judging device

Batch alarm of general-purpose equipment control interface

General-purpose equ ipment

I/F

TCC-LINK

Page 48

The check code

1. The TCC LINK check code

The displaying method of the check code .

TCC Link

Used characters

Characteristics of code classification

Block display

Alphabet + Decimal notation, 2 digits

→

Many classification of communication/ incorrect setup system

Communication/Incorrect setup (4 ways), Indoor protection, Outdoor protection, Sensor, Compressor protection, etc.

Display

A C E

J L

Classification

Unused Central control system error Communication system error Each sensor error (Failure) Compressor protective system error Unused Setup error, Other errors Protective device operation

< Display in wired remote controller >

• [ ] goes on.

• [UNIT No.] + Check code + Operation lamp (Green) flash

• Block display of combination of [ ] [ ] [ ]

• Unit No. and check code are displayed.

• In a case of error with auxiliary code, the check code and the auxiliary code are displayed alternately.

2. Special mention

• The check code of the remote controller is displayed only while the air conditioner is operating (Remote controller start button ON).

When the air conditioner stopped and the error has been cleared, the check code display on the remote controller also disappears.

However, if the error continues after stop of the operation, the check code is immediately displayed with restarting of the operation.

Page 49

7-3. Troub leshooting by Check Display on Remote Controller

In case of wired remote controller (RBC-AMT31E)

1. Confirmation and check

When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the display section of the remote controller.

The check code is displayed while the air conditioner operates.

If the display disappeared, operate the air conditioner and check the error based upon the following “Confirmation of error history”.

2. Confirmation of error history

When a trouble occurred on the air conditioner, the error history can be confirmed with the following procedure. (Up to 4 error histories are stored in memory.)

This history can be confirmed from either operating status or stop status.

UNIT No.

R.C. No.

Check code Indoor unit No. in which

TEMP.

FILTER

TEST

RESET

an error occurred

TIMER SET

FAN

SWING/FIXTIME

UNITSET CL

CODE No.

ON / OFF

MODE

VENT

Procedure

Description

When pushing If [Service Check] is displayed, the mode enters in the error history mode.

• [01: Error history order] is displayed in code number window.

• [Check Code] is displayed in check code window.

• [Indoor unit address with error] is displayed in UNIT No.

Every pushing temp. set / buttons, the error histories stored in the memory are displayed in order.

The numbers in item code indicates item code [01] (Latest) to [04] (Oldest).

CAUTION

Do not push [CL] button because all the error histories of the indoor unit will be deleted.

After confirmation, push

SET

and

TEST

buttons simultaneously for 4 seconds or more, the below display appears.

UNIT No.

R.C. No.

TEST

button to return to the usual display.

CODE No.

Page 50

In case of central remote controller (TCB-SC642TLE)

ZONE

ALL

ZONE

GROUP

1234

SET DATA

SETTING

R.C.

SELECT ZONE

UNIT No.

No.

TEST

SET

1. Confirmation and check

When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the display section of the remote controller.

The check code is displayed while the air conditioner operates. If the display disappeared, operate the air conditioner and check the error based upon the following “Confir-

mation of error history”.

GROUP

CODE

No.

Unit No display Alarm display

UNIT No.

Alternate flashing display

R.C No.

2. Confirmation of error history

When a trouble occurred on the air conditioner, the error history can be confirmed with the following procedure. (Up to 4 error histories are stored in memory.)

This history can be confirmed from either operating or stop.

1) Push and

2) SERVICE CHECK goes on and Item code 01 goes on.

3) When selecting (flash) the group number if there is the alarm history, the UNIT number and the latest

alarm history are displayed alternately . * In this time, the temperature cannot be set up.

4) To confirm the alarm history other than the latest one, push temp. set / to select Item code

(01 to 04).

5) To confirm the alarm in the other group, push

Do not push

buttons in succession for 4 seconds or more.

SET

GROUP

ZONE

and

button because all the alarm histories of the currently selected group are deleted.

to select the group number

6) To finish the service check, push button.

Unit No display Alarm display

UNIT No.

Alternate flashing display

R.C No.

Page 51

7-4. Check Code and Chec k Position Displayed on the Remote Controller and Outdoor Unit

(7-Segment Display of Interface)

Check code

Main

remote

controller

Outdoor 7-segment display

Check code

Auxiliary code

Detected

position

Check code name

Status

Error detection condition

Check item (position)

E01

E02

E03

E04

E06

—

E06

E07

—

No. of indoor units which received signal normally

—

Remote

controller

Remote

controller

Indoor unit

I/F

Communication error between indoor and remote controller (Detected at remote controller side)

Remote controller sending error

Communication error between indoor and remote controller (Detected at indoor side)

Indoor/outdoor communication circuit error (Detected at indoor side)

Decreased number of indoor units

Indoor/outdoor communication circuit error (Detected at outdoor side)

Corresponding

unit only stops.

Corresponding

unit only stops.

Corresponding

unit only stops.

Corresponding

unit only stops.

All stop

Communication interrupted between indoor P.C. board and remote controller.

Signal could not be sent from remote controller to indoor unit.

No communication from remote controller (including wireless) and communication adapter.

Indoor unit does not receive communication from outdoor unit.

When signal is not sent for a certain period from the indoor unit which has been used to send signals, [E06] is normally displayed.

Transmission from outdoor to indoor cannot continue for 30 seconds.

• Check remote controller inter-unit cable (A/B).

• Check disconnection, connector contact error.

• Check indoor power supply.

• Check indoor P.C. board error.

• Check remote controller address setup. (When two remote controllers operate)

• Check remote controller P.C. board.

• Check the communication wire of remote controller: Exchange remote controller.

• Check remote controller and communication adapter wiring.

• Check power-ON order of indoor/outdoor.

• Check indoor address setup.

• Check inter-unit cabling between indoor and outdoor.

• Check outdoor end terminal resistance setup (SW30-2).

• Check the power supply of indoor unit. (Power-ON)

• Check connection of communication line between indoor and outdoor.

• Check connector connection for communication in indoor P.C. board.

• Check connector connection for communication in outdoor P.C. board.

• Check indoor P.C. board failure.

• Check outdoor P.C. board (I/F) failure.

• Check outdoor terminator resistor setup (SW30-2).

• Check the communication connection between indoor and outdoor.

E08

E09

E10

E08

—

Duplicated indoor addresses

—

Indoor

I/F

Remote

controller

Indoor unit

Duplicated indoor addresses

Duplicated master remote controllers

Communication error between indoor P.C. board assembly

All stop

Corresponding

unit only stops.

Corresponding

unit only stops.

Multiple indoor unit address setup are duplicated.

In 2-remote controller control (including wireless), both are setup as master (Header indoor unit stops and other indoor unit is operating.)

There is any trouble in power line.

• Check indoor address.

• Check the change of remote controller connection (Group / individual) after setup of indoor address.

• Check remote controller setup.

• Check remote controller P.C. board.

• Indoor P.C. board f ailure

Page 52

Main

remote

controller

E12

E15

E16

E18

E19

E20

E23

E25

E26

E28

Check code

E12

E15

E16

—

E19

E20

E23

E25

E26

E28

Check code

Outdoor 7-segment display

Auxiliary code

01: Indoor/outdoor communication 02: Between outdoors communication

—

00: Capacity over 01 to: No . of connected units

—

00: No header unit 02: Two or more header units

01: Connection of outdoor of other line 02: Connection of indoor of other line

—

No. of normally received outdoor units

No. of detected outdoor units

Detected

position

I/F

Indoor

unit

I/F

Check code name

Automatic address start error

No corresponding indoor unit during automatic address

No. of connected indoor units / Capacity over

Communication error between indoor header and follower units

Outdoor unit quantity error

Other line unit connected during automatic address

Communication sending error between outdoor units

Duplicated outdoor follower address setup

Decreased number of connected outdoor units

Outdoor follower unit error

Status

All stop

Corresponding

unit only stops.

All stop

Error detection condition

• When indoor automatic address started, other refrigerant circuit system was setting automatic address.

• When outdoor automatic address started, indoor automatic address was executed.

Indoor unit is not found when indoor automatic address start was set up.

• Total capacity of indoor units exceeded 135% of total outdoor capacity .

• No. of connected indoor units are more than 48 units.

[Note]

If this code appears after backup setup of outdoor unit trouble, set up “No. capacity-over detection”.

Turn on SW09/Bit 2 on I/F P.C. board of outdoor header unit.

Regular communication between indoor header and follower units

• There are multiple outdoor units in 1 line.

• There is none of outdoor unit in 1 line.

Unit of other line was connected when indoor automatic address started.

Transmission of other outdoor unit was unavailable for 30 seconds or more.

Outdoor addresses manually set up are duplicated.

The signal was not returned for constant from the outdoor unit which was receiving signal.

Outdoor header unit received error code from outdoor follower unit.

When pushing SW04 for 1 second or more under condition that [E28] is displayed on 7-segment display of outdoor header unit, the fan of outdoor unit which stopped abnormally starts rotating. If pushing SW04 and SW05 simultaneously, the fan of normal outdoor unit operates. When pushing SW05 singly , the oper ation of fan is cleared.

• Setup the address again after disconnecting communication connection with other refrigerant circuit system.

•

Check the communication line connection between indoor and outdoor .

• Check the electric power line error in indoor.

• Check the noise of surrounding devices.

• Power failure

• Check indoor P.C. board error.

• Check the connection capacity of indoor unit.

• Check the HP capacity of indoor unit.

• Check the indoor/outdoor capacity setup

• Check the No. of connected indoor units.

• Check the outdoor I/F P.C. board error

• Check cable of the remote controller.

• Check power cabling of indoor.

• Check P.C. board of indoor.

The outdoor unit connected with communication cable between indoor and outdoor (U1.U2) is the outdoor unit.

•

Check connection of communication line between indoor and outdoor .

• Check outdoor P.C. board(I/F) error.

Separate the cable between lines according to automatic address setup method in “Address setup”.

In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the other refrigerant line.

Note)

Do not set up the outdoor address manually. In this model, only one outdoor unit is provided to one refrigerant line.

Be sure to check there is no communication connection with outdoor unit in the other refrigerant line.

• Check the check code of outdoor follower unit.

Check item (position)

Page 53

Main

remote

controller

E31

F01

F02

F03

F04

F05

F06

F07

F08

F10

F12

Check code

E31

—

F04

F05

F06

F07

F08

—

F12

Check code

Outdoor 7-segment display

Auxiliary code

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 errors 04: Fan IPDU error 05: IPDU1 + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error or communication error

between IPDU and I/F P.C. board or outdoor I/F P.C. board error

—

01: TS1 02: TS2

Detected

position

I/F

Indoor unit

I/F

Indoor

I/F

Check code name

IPDU communication error

Indoor TCJ sensor error

Indoor TC2 sensor error

Indoor TC1 sensor error

TD1 sensor error

TD2 sensor error

TE1 sensor error

TL sensor error

TO sensor error

Indoor T A sensor error

TS1, TS2 sensor error

Status

All stop

Corresponding unit only stops.

All stop

Corresponding unit only stops.

All stop

Error detection condition

Communication of each IPDU (P.C. board) in inverter box interrupted.

• Resistance value of sensor is infinite or zero. (Open/Short)

• Resistance value of sensor is infinite or zero (Open/Short).

• Resistance value of sensor is infinite or zero (Open/Short)

• Resistance value of sensor is infinite or zero (Open/Short).

Check item (position)

• Check connection of communication connector and disconnection between IPDU and I/F P.C. board.

• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.

• Check external noise.

• Check power supply P.C. board for fan error.

• Check connection/cabling of TCJ sensor connector.

• Check characteristics of TCJ sensor resistance value.

• Check indoor P.C. board error.

• Check connection/cabling of TC2 sensor connector.

• Check characteristics of TC2 sensor resistance value.

• Check indoor P.C. board error.

• Check connection/cabling of TC1 sensor connector.

• Check characteristics of TC1 sensor resistance value.

• Check indoor P.C. board error.

• Check connection of TD1 sensor connector .

• Check characteristics of TD1 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TD2 sensor connector .

• Check characteristics of TD2 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TE1 sensor connector .

• Check characteristics of TE1 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TL sensor connector.

• Check characteristics of TL sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TO sensor connector.

• Check characteristics of TO sensor resistance v alue .

• Check outdoor P.C. board (I/F) error.

• Check connection/cabling of TA sensor connector.

• Check characteristics of TA sensor resistance value.

• Check indoor P.C. board error.

• Check connection of TS1 or TS2 sensor connector.

• Check characteristics of TS1, TS2 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

Page 54

Main

remote

controller

F13

F15

F16

F23

F24

F29

F31

H01

H02

Check code

Outdoor 7-segment display

Check code

F13

F15

F16

F23

F24

—

F31

H01

H02

Auxiliary code

01: Compressor 1 side 02: Compressor 2 side

—

01: Compressor 1 side 02: Compressor 2 side

Detected

position

IPDU

I/F

Indoor

I/F

IPDU

Check code name

TH sensor error

Outdoor temp sensor miscabling (TE1, TL)

Outdoor pressure sensor miscabling (Pd, Ps)

Ps sensor error

Pd sensor error

Indoor other error

Outdoor EEPROM error

Compressor breakdown

Compressor error (lock) MG-SW error OCR operation

Status

All stop

Corresponding

unit only stops.

All stop (*1)

All stop

Error detection condition

• Resistance value of sensor is infinite or zero (Open/Short).

During operation of compressor in HEAT mode, the TE1 detection temp was higher than that of TL by the specified value continued for 3 minutes or more .

High-pressure Pd sensor and low-pressure Ps sensor were exchanged, or output voltages of both sensors are zero.

Output voltage of Ps sensor was zero.

Output voltage of Pd sensor was zero. (Sensor Open) Pd > 4.15MPa during stop of compressor

Indoor P.C. board did not operate normally.

Outdoor P.C. board (I/F) did not operate normally.

Inverter current detection circuit detected over-current and stopped.

Over-current was detected sev er al seconds after header compressor had started.

Check item (position)

• IGBT built-in temp sensor error → Exchange IPDU P.C. board.

• Check installation of TE1 sensor and TL sensor.

• Check characteristics of TE1 and TL sensor resistance v alue .

• Check outdoor P.C. board (I/F) error.

• Check connection of high-pressure Pd sensor connector.

• Check connection of low-pressure Ps sensor connector.

• Check pressure sensors Pd and Ps error.

• Check outdoor P.C. board (I/F) error.

• Check compression error of compressor.

• Misconnection of Ps sensor and Pd sensor connectors

• Check connection of Ps sensor connector.

• Check Ps sensor error.

• Check compression error of compressor.

• Check 4-way valv e error.

• Check outdoor P.C. board (I/F) error.

• Check SV4 circuit error.

• Check connection of Pd sensor connector.

• Check Pd sensor error.

• Check outdoor P.C. board (I/F) error.

• Check indoor P.C. board error (EEPROM error).

• Check power voltage.

• Check power noise.

• Check outdoor P.C. board (I/F) error.

• Check power voltage. (AC220–240V ± 10%).

• Check compressor error.

• Check cause of abnormal overload operation.

• Check outdoor P.C. board (IPDU) error.

• Check compressor error.

• Check power voltage. (AC380–10%, 415V +10%).

• Check cable of compressor and phase-missing.

• Check connector/terminal connection on IPDU P.C. board.

• Check conduction of case heater. (Check activation error due to liquid stagnation in compressor .)

• Check outdoor P.C. board (IPDU) error.

• Check outdoor MG-SW or OCR.

(*1) All stop only in case of the header unit The follower unit continues operation.

MG-SW : Magnet Switch, OCR : Over-current Relay

Page 55

Main

remote

controller

Check code

Outdoor 7-segment display

Check code

Auxiliary code

Detected

position

Check code name

Status

Error detection condition

Check item (position)

H03

H04

H06

H03

H04

H06

01: Compressor 1 side 02: Compressor 2 side

—

IPDU

I/F

Current detection circuit system error

Compressor 1 case thermo operation

Low-pressure protective operation

All stop

While header compressor stopped, current flowed more than the specified current and was detected.

Compressor 1 case thermostat performed protective operation.

Low-pressure Ps detected operation lower than

0.02MPa.

• Check cabling of current detection circuit system.

• Check outdoor P.C. board (IPDU) error.

• Check compressor 1 case thermo circuit. (Connector , cab le , P.C. board)

• Check full opening of service valve. (Gas and liquid side)

• Check outdoor PMV clogging. (PMV1, 2, 3)

• Check SV41 circuit leakage.

• Check miscabling/misinstallation of SV41 and SV42.

• Check valve open status of indoor PMV.

• Check 4-way valv e error.

• Check refrigerant shortage.

• Check SV5 leak.

• Check SV11 circuit. (Wiring, OFF at one side only)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS v alve.

(Check leakage of SVDD valv e and SVSS.) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),

wiring between FS unit and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valv es .

• Check full opening of service valve. (Discharge gas, suction gas and liquid side)

• Check outdoor PMV clogging. (PMV1, 2)

• Check SV2 circuit and SV4 circuit error.

• Check low-pressure Ps sensor error.

• Check indoor air filter clogging.

• Check valve open of indoor PMV.

• Check refrigerant pipe clogging.

• Check outdoor fan operation. (All heating, mainly heating, part cooling operation)

• Check refrigerant shortage.

• Check clogging of circuit at auxiliary heat exchanger side. (PMV3, SV12, check valve)

• Check 4-way valve error. (Reversal error)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check miswiring of discharge gas/suction gas pipe to FS unit. Check wiring between FS unit and indoor unit. Check miswiring of SVD/SVS valves, misinstallation of coil. Check opened status of SVS valve.

Page 56

Main

remote

controller

H07

H08

H14

Check code

Outdoor 7-segment display

Check code

H07

H08

H14

Auxiliary code

01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error

Detected

position

—

Check code name

I/F

Protection for oil level drop detection

Oil level detective

I/F

temp sensor error

Compressor 2 case

I/F

thermo operation

Status

All stop

Error detection condition

The operating compressor detected oil shortage continuously for 2 hours.

• Resistance value of sensor is infinite or zero. (Open/Short)

Compressor 2 case thermostat operated.

Check item (position)

• Check full opening of service valve of balance pipe.

• Check connection and installation of TK1, TK2, TK3, and TK4 sensors.

• Check characteristics of TK1, TK2, TK3, and TK4 resistance values.

• Check gas leak and oil leak in the same line.

• Check refrigerant stagnation in compressor.

• Check error of SV3A, SV3B, SV3C, SV3D, and SV3E valves.

• Check clogging of oil separator oil return circuit.

• Check clogging of oil-equation circuit.

• Check TS1, TS2 sensors (Mis wiring and misinstallation of TS1 and TS2)

• Check leakage of SV6 circuit.

• Check FS unit. Leakage of check valve of b ypass between liquid pipe and discharge gas pipe Mispiping of discharge/suction gas connection Miswiring of SVD/SVS valve/Misinstallation of coil

• Check whether there is no setup missing of indoor unit in all cooling operation mode

• Check connection of TK1 sensor connector .

• Check characteristics of TK1 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TK2 sensor connector .

• Check characteristics of TK2 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TK3 sensor connector .

• Check characteristics of TK3 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check connection of TK4 sensor connector .

• Check characteristics of TK4 sensor resistance value.

• Check outdoor P.C. board (I/F) error.

• Check compressor 2 case thermo circuit. (Connector, cab le , P.C. board)

• Check full opening of service valve. (Gas and liquid side)

• Check outdoor PMV clogging. (PMV1, 2)

• Check SV42 valve leak.

• Check miscabling/misinstallation of SV41 and SV42.

• Check valve opening of indoor PMV.

• Check 4-way valve error.

• Check refrigerant shortage.

• Check SV11 circuit. (Wiring, OFF at one side only)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS v alve. (Check leakage of SVDD valv e and SVSS .) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between

FS unit and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valves .

Page 57

Main

remote

controller

H16

L03

L04

L05

Check code

Outdoor 7-segment display

Check code

H16

01: TK1 oil circuit system error 02: TK2 oil circuit system error 03: TK3 oil circuit system error 04: TK4 oil circuit system error

—

L04

—

Auxiliary code

—

Detected

position

I/F

Indoor

I/F

Check code name

Oil level detective circuit system error MG-SW error OCR operation

Duplicated indoor center units

Duplicated outdoor line address

Duplicated indoor units with priority (Displayed on indoor unit with priority)

Status

All stop

Corresponding

unit only stops.

All stop

Error detection condition

Temperature change of TK1 could not be detected though compressor 1 started the operation.

Temperature change of TK2 could not be detected though compressor 2 started the operation.

Temperature change of TK3 could not be detected though compressor started the operation.

Temperature change of TK4 could not be detected though compressor started the operation, or the difference from other TK sensor changed for a constant time only within the specified range.

There are multiple center units in a group.

Line address setup is duplicated against the outdoor unit in different refrigerant pipe system.

Indoor units with priority were duplicated.

Check item (position)

• Check TK1 sensor coming-off.

• Check characteristics of TK1 sensor resistance value.

• Check TK1, TK2, TK3, and TK4 misconnection.

• Check operation error of SV3E valve.

• Check capillary clogging of oil-equation circuit and operation error of stop valve.

• Check refrigerant stagnation in compressor.

• Check MG-SW or OCR.

• Check TK2 sensor coming-off.

• Check characteristics of TK2 sensor resistance value.

• Check TK1, TK2, TK3, and TK4 misconnection.

• Check SV3E valve operation.

• Check capillary clogging of oil equalization circuit and check stop valve operation.

• Check refrigerant stagnation in compressor shell.

• Check MG-SW or OCR.

• Check TK3 sensor coming-off.

• Check characteristics of TK3 sensor resistance value.

• Check TK1, TK2, TK3, and TK4 misconnection.

• Check SV3E valve operation.

• Check capillary clogging of oil-equalization circuit and check valve operation.

• Check refrigerant stagnation in compressor shell.

• Check MG-SW or OCR.

• Check TK4 sensor coming-off.

• Check characteristics of TK4 sensor resistance value.

• Check TK1, TK2, TK3, and TK4 misconnection.

• Check SV3E valve operation.

• Check capillary clogging of oil-equalization circuit and check valve operation.

• Check refrigerant stagnation in compressor shell.

• Check MG-SW or OCR.

• Check indoor address.

• Check the change of remote controller connection (Group/individual) after indoor address setup.

• Check line address.

• Check display of indoor unit with priority.

MG-SW : Magnet Switch, OCR : Over-current Relay

Page 58

Main

remote

controller

L06

L07

L08

L09

L10

L17

L18

L20

L28

L29

L30

—

Check code

L06

—

L08

—

L10

L17

L18

—

L28

L29

L30

L31

Check code

Outdoor 7-segment display

Auxiliary code

No. of indoor units with priority

—

Corresponding indoor address

—

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 errors 04: Fan IPDU error 05: IPDU1 + Fan IPDU error 06: IPDU2 + Fan IPDU error 07: All IPDU error or communication

error between IPDU and I/F P.C. board, or outdoor I/F P.C. board error

Detected indoor address

—

Detected

position

I/F

Indoor

I/F

Indoor

I/F

Indoor

I/F

Check code name

Duplicated indoor units with priority (Displayed on the unit other than indoor unit with priority)

Group line in individual indoor unit.

Indoor group / address unset

Indoor capacity unset

Outdoor capacity unset

Inconsistent models of outdoor units

FS unit system error

Duplicated central control addresses

Quantity over of connected outdoor units

IPDU quantity error

Interlock in indoor unit from outside

Extended IC (Integrated Circuit) error

Status

All stop

Corresponding unit only stops.

All stop

Corresponding unit only stops.

All stop

Corresponding unit only stops.

Operation

continues.

Error detection condition

Indoor units with priority were duplicated.

At least one indoor unit connected to a group existed in the individual indoor units.

Address was not yet set up.

Indoor unit capacity was unset.

On the I/F P.C. board for service, jumper line was not cut according to the model.

Outdoor units of 1 series and those of 2 series were mixed.

An indoor unit which is not connected with FS unit is driving without setup for cooling only mode.

Duplicated central control addresses

There were more than four outdoor units.

No. of IPDU units detected when power was turned on were less.

• Outside error input terminal Detected signal to (CN80) for

more 1 minute

P.C. board (I/F) parts error

Check item (position)

• Check display of indoor unit with priority and outdoor unit.

• Check indoor address.

• Check indoor address. Note)

After installation, this code is displayed when the power is firstly turned on.

Set up indoor capacity . (DN=11)

Check model setup on outdoor I/F P.C. board A’ssy f or service.

• Check outdoor units.

• Check setup of remote controller (DN=[OFF]).

• Check FS unit. Check pipe connection to FS unit.

(Mispiping between discharge gas and suction gas) Check miswiring/misinstallation of SVS/SVD valv es.

• Check central control address.

• Check network adaptor P.C. board. (In case of AI-NET)

• Check No. of connected outdoor units. (Max. 4 units per 1 system)

• Check communication line between outdoor units.

• Check outdoor P.C. board (I/F) error.

• Check model setup for outdoor I/F service P.C. board.

• Check connection of UART communication connector .

• Check IPDU, fan IPDU, and I/F P.C. board error.

Note) UART : Universal Asynchronous Receiver Transmitter

n Outside device is connected to connector (CN80):

1) Check outside device error.

2) Check indoor P.C. board error.

n Outside device is not connected to connector (CN80):

1) Check indoor P.C. board error. Check indoor (I/F) P.C. board.

Check indoor (I/F) P.C. board.

Page 59

Main

remote

controller

P01

P03

P04

P05

Check code

Outdoor 7-segment display

Check code

—

P03

P04

P05

01: Compressor 1 side 02: Compressor 2 side

01: Pow er supply open phase 02: Po wer supply negative phase

Auxiliary code

—

Detected

position

Indoor

I/F

Check code name

Indoor fan motor error

Discharge temp TD1 error

Actuation of high-pressure SW

Open phase negative phase

Status

Corresponding unit only stops.

All stop

Error detection condition

Discharge temp (TD1) exceeded 115°C.

High-pressure SW actuated.

• Open phase was detected when the power turned on.

• Negative phase was detected when the power turned on.

Check item (position)

• Check the lock of fan motor (AC f an).

• Check cabling.

• Check full opening of outdoor service valves (Gas side, Liquid side).

• Check clogging of outdoor PMV . (PMV1,2)

• Check characteristics of TD1 sensor resistance value.

• Check refrigerant shortage.

• Check 4-way valve error.

• Check leakage of SV41 circuit.

• Check SV4 circuit. (Miswiring and misinstallation of SV41 and SV42)

• Check leakage of SV5 circuit.

• Check leakage of SV6 circuit. (Capillary clogging, valve operation error)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS v alv e .

(Check leakage of SVDD valve and SVSS .) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),

wiring between FS unit and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valves .

• Check Pd pressure sensor error.

• Check full opening of outdoor service valves (Gas side, Liquid side).

• Check outdoor fan error.

• Check outdoor fan motor error.

• Check clogging of outdoor PMV . (PMV1,2)

• Check clogging of indoor/outdoor heat exchangers.

• Check short-circuiting of outdoor suction/discharge air.

• Check clogging of SV2 circuit.

• Check outdoor P.C. board (I/F) error.

• Check indoor fan system error. (Cause of air volume decrease)

• Check opening of indoor PMV .

• Check miscabling of communication line between indoor and outdoor.

• Check operation error of check valve of discharge pipe.

• Check SV4 valve circuit.

• Check SV5 valve circuit.

• Check refrigerant overcharge.

• Check mispiping of discharge gas/suction gas main pipe.

• Check circuit clogging at auxiliary heat exchanger side. (PMV3, SV12, check valve)

• Check FS unit. Check clogging of SVD valve and operation error. Check wiring inside of FS unit. (SVD/SVS coil mis wiring, etc.) Check wiring between FS unit and indoor unit.

(Miswiring, Disconnection, Wiring missing)

• Check outdoor power line.

• Check outdoor P.C. board (I/F) error.

Page 60

Main

remote

controller

P07

P10

P12

P13

P15

Check code

Outdoor 7-segment display

Check code

P07

P10

—

P13

P15

Auxiliary code

01: Compressor 1 side 02: Compressor 2 side

Indoor address with trouble

01: TS condition

02: TD condition

Detected

position

IPDU

I/F

Indoor

—

Indoor

I/F

Check code

name

Heat sink overheat error

Indoor overflow error

Indoor fan motor error

Outdoor liquid back detection error

Gas leak detection (TS1 condition)

Gas leak detection (TD condition)

Status

All stop

Corresponding unit only stops.

All stop

Error detection condition

IGBT built-in temp sensor (TH) was overheated.

• Float switch operated.

• Float switch circuit disconnected or the connector came off.

• The value of motor speed deviated from target value was detected for certain time.

• Over-current protection operated.

While the system is operating in HEAT mode, outdoor PMV of which opening degree was 100 pulse or less for a certain time.

Suction temp exceeded the judgment standard temp for 10 minutes or more.

In cooling operation: 60°C or higher In heating operation: 40°C or higher

Discharge temperature TD1 or TD2 was continuously 108°C or higher for 10 minutes .

Check item (position)

• Check power voltage.

• Check outdoor fan system error.

• Check clogging of heat sink cooling duct.

• Check fixation between IGBT and heat sink. (Check scre wing and contact.)

• Check IPDU error.(IGBT built-in temp sensor (TH) error).

• Check the float switch connector.

• Check operation of drain pump unit.

• Check the drain pump circuit.

• Check clogging of drain pipe.

• Check indoor P.C. board error .

• Check connection of fan connector and wiring.

• Check fan motor error.

• Check indoor P.C. board error.

• Check influence of outside air control.

• Check indoor type code (DN=10) and the capacity code (DN=11).

• Check full close operation of outdoor PMV (1, 2).

• Check Pd and Ps sensor error.

• Check clogging of SV2 circuit.

• Check clogging of 4-way valve error circuit.

• Check outdoor P.C. board (I/F) error.

• Check capillary clogging of oil return circuit from oil separator .

• Check TS1, TS2 sensor error.

• Check refrigerant shortage.

• Check full open of outdoor service valves (gas side, liquid side).

• Check outdoor PMV clogging (PMV1, 2).

• Check characteristics of TS1 sensor resistance value.

• Check 4-way valve error.

• Check leakage of SV4 circuit.

• Check leakage of SV5 circuit.

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS valv e. (Check leakage of SVDD valve and SVSS.) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),

wiring between FS unit and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valves .

• Check refrigerant shortage.

• Check outdoor PMV clogging (PMV1, 2).

• Check characteristics of TD1, TD2 sensor resistance value.

• Check indoor air filter clogging.

• Check pipe clogging.

• Check SV4 circuit (Valve leakage, misinstallation)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS valv e. (Check leakage of SVDD valve and SVSS.) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas),

wiring between FS unit and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valves .

Page 61

Main

remote

controller

P17

P19

P20

Check code

Outdoor 7-segment display

Check code

P17

P19

P20

Auxiliary code

Detected outdoor unit No.

Detected

position

—

I/F

Discharge temp TD2 error

I/F

4-way valv e operation error

High-pressure

I/F

protective operation

Check code name

Status

All stop

Error detection condition

Discharge temperature (TD2) exceeded 115°C.

When abnormal refrigerating cycle data was detected in heating

Pd sensor detected 3.6MPa or more.

Check item (position)

• Check full opening of outdoor service valves (gas side, liquid side).

• Check clogging of outdoor PMV (PMV1, 2).

• Check characteristics of TD2 sensor resistance value.

• Check 4-way valve error.

• Check leakage of SV42 circuit.

• Check SV4 circuit. (Miscabling and misinstallation of SV41 and SV42)

• Check leakage of SV5 valve circuit.

• Check SV6 circuit. (Clogging, Valve operation error)

• Check mispiping of discharge gas/suction gas main pipe.

• Check Flow selector unit. Check leakage of SVD valve and SVS v alv e. (Check leakage of SVDD valve and SVSS .) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between FS unit

and indoor unit, and connection of connectors. Check miswiring of SVS/SVD valves .

• Error of 4-way valve error.

• Check coil error and connector connection of 4-way valve.

• Check characteristics of TS1/TE1 sensor resistance value .

• Check characteristics of Pd, Ps pressure sensor output voltage.

• Check misconnection of TE1 and TL sensors.

• Check Flow selector unit. Check leakage of SVD valve and SVS v alv e. (Check leakage of SVDD valve and SVSS .) Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas).

• Check Pd pressure sensor error.

• Check full opening of service valves (Gas side, Liquid side).

• Check outdoor fan error.

• Check outdoor fan motor error.

• Check clogging of outdoor PMV . (PMV1,2)

• Check clogging of indoor/outdoor heat exchangers.

• Check air short-circuiting in outdoor unit.

• Check clogging of SV2 circuit.

• Check outdoor P.C. board (I/F) error.

• Check indoor fan system error. (Cause of air volume decrease)

• Check valve opening of indoor PMV.

• Check miscabling of communication line between indoor and outdoor.

• Check operation error of check valve of discharge pipe.

• Check circuit of gas balance SV4 valve.

• Check mispiping of discharge gas/suction gas main pipe.

• Check operation error of check valve of discharge gas pipe.

• Check circuit of SV11 valve. (Clogging, OFF at one side only)

• Check clogging of circuit at auxiliary heat exchanger side. (Miswiring, Disconnection, Wiring missing)

• Check Flow selector unit. Check leakage of SVD valve and oper ation error. Check wiring inside of FS unit. (SVD/SVS coil mis wiring, etc.) Check wiring between FS unit and indoor unit. (Mis wiring, Disconnection, Wiring missing)

• Check circuit of SV5 valve.

• Check refrigerant overcharge.

Page 62

Main

remote

controller

Check code

Outdoor 7-segment display

Check code

Auxiliary code

Detected

position

Check code name

Status

Error detection condition

Check item (position)

P22

0: IGBT shortage 1: Position detection circuit error 3: Motor lock error 4: Motor current error detection C:TH sensor temp. error D:TH sensor error E: Vdc error

FAN-IPDU

Outdoor fan IPDU error

All stop

(Auxiliary code: 0)

• Short-circuit current was detected at start time.

• Short-circuit current was detected when checking IGBT short-circuit before start time.

(Auxiliary code: 1)

• The standard value of detection circuit of fan IPDU current fluctuated at start time.

(Auxiliary code: 3)

• Abnormal current was detected within 30 seconds after start time.

(Auxiliary code: 4)

• Short-circuit current was detected when 2 seconds or more passed after start time.

• Over-current was detected when 30 seconds or more passed after start time.

(Auxiliary code: C)

• Heat sink sensor (TH) of fan IPDU detected 95°C error.

(Auxiliary code: D)

• Heat sink sensor (TH) of fan IPDU detected short-circuiting or open.

(Auxiliary code: E)

• Input power supply voltage of the fan IPDU over the setup value was detected.

• Input power supply terminal of the fan IPDU was unconnected.

• Power supply P.C. board error of the fan IPDU

• Check fan motor. (Interphase short-circuit)

• Check fan IPDU error.

• Check fan motor. (Lock, phase missing)

• Check cause of abnormal overload at start time.

• Check connection of connector to fan motor.

• Check power supply voltage.

• Check fan IPDU error.

• Check outdoor fan system.

• Check fan IPDU error.

• Check fixation between fan IPDU and heat sink.

• Check fan IPDU error.

• Check input power supply voltage of the fan IPDU.

• Check power supply P.C. board error of the fan IPDU.

• Check error of external electrolytic condenser.

P26

P29

P31

P26

P29

—

01: Compressor 1 side 02: Compressor 2 side

—

IPDU

Indoor

G-Tr short-circuit protection error

Compressor position detection circuit error

Other indoor error (Group follower unit error)

All stop

Corresponding

unit only stops.

Instantaneous over-current was detected when compressor started.

Position was not normally detected.

E07/L07/L03/L08 was detected when other indoor unit in the group was defective.

•

Check connector connection and wiring on IPDU P.C. board.

• Check compressor error and defect of compressor coil.

• Check outdoor P.C. board (IPDU) error.

• Check connector connection and wiring.

• Check compressor error and defect of compressor coil.

• Check P.C. board (IPDU) error.

• Check indoor P.C. board.

Page 63

Error detected by TCC-LINK central control device

Check code

Display on

central control

device

C05

C06

C12

P30

Outdoor 7-segment display

Check code

—

Differs according to error contents of the with alarm

(L20 is displayed.)

Auxiliary code

Detected position

TCC-LINK

HA control interface

TCC-LINK

Check code name

TCC-LINK central control device transmission error

TCC-LINK central control device receiving error

Interface batch alarm of HA control interface

Follower unit error of group control

Duplicated central control address

Status

Operation

continued.

Operation

continued.

Operation

continued.

Operation

continued.

Operation

continued.

Error detection condition

Signal is not transmit from central control device.

Signal is not received from central control device.

Error was input in HA control interface

An error occurred in follower unit of the group control. ([P30] is displayed only on the central remote controller.)

Central control addresses were duplicated.

Check item (position)

• Check central control device error .

• Check communication line error of central control device.

• Check setup of terminator resistor.

• Check central control device error .

• Check communication line error of central control device.

• Check setup of terminator resistor.

• Check the power of connecting destination connected device.

• Check P.C. board error of the connected device.

• Check error input.

• Check the check code of the unit with alarm.

• Check the address setup.

Page 64

Cautions when servicing for compressor

1. Removing wires of both compressors check output of the inverter as described below.

How to check inverter output

1. Turn off the power supply.

2. Remove the compressor lead cables from the compressors. (Be sure to remove lead cab les of both compressors.)

3. Turn on the power supply and start cooling or heating operation. In this time, pay attention to touch the fasten receptacle terminal lug of the compressor leads so that they do

not contact with other fasten receptacle terminal lug or other position (unit cabinet, etc.).

4. Check output voltage of compressor lead cable at inverter side. When the output voltage does not satisfy the criteria in the following tab le, replace IPDU P.C. board.

No.

1 2 3

Measured position

Between Red and White

Between White and Black

Between Black and Red

Criteria

400 V to 650 V 400 V to 650 V 400 V to 650 V

* After checking the output, when connecting the compressor lead again to the compressor terminal, check

surely there is no distortion on the fasten terminal lug. If it is loosened, caulk it with pinchers, etc and then connect lead to the terminal.

How to check resistance of compressor winding

1. Turn off the power supply.

2. Remove the compressor lead cables from the compressors. In each compressor, check the winding resistance between phases and resistance of the outdoor cabinet

using a tester.

• Is not it earthed?

→ Normal if 10MΩ or more are measured

• Is not shorted between windings?

→ Normal if 0.7Ω to 0.9Ω are measured (Use a precise digital tester.)

How to check the outdoor fan motor

1. Turn off the power supply.

2. Take off three connectors (U . V.W) from the fan IPDU P.C. board.

3. Turn the fan with hands. If the fan does not turn, it is a fan motor error (Lock). Replace the fan motor . If the fan turns, measure the winding resistance between the phases of the connector (Motor winding) with a tester. If 13 to 33Ω are measured, it is normal. (Use a digital tester.)

Page 65

7-5. Diagnosis Procedure f or Eac h Check Code

Is address setup correct?

Is there no noise, etc?

YES

Is connector connection from

U1/U2 terminals of indoor/outdoor

inter-unit wire normal?

Was power turned on in order of indoor unit outdoor unit?

Is the end terminal resistance setup of outdoor unit normal?

Is power applied to fuse (F03)

on indoor P.C. board?

Is connection (U1/U2 terminals) of

indoor/outdoor inter-unit wire normal?

Check indoor P.C. board.

Defect Replace

Check connection of inter-unit wire between indoor and outdoor is correct, and then connect communication line connector on indoor P.C. board (CN40) to CN44 (EMG).

Correct inter-unit wire.

Turn on power again in order of

indoor unit

outdoor unit.

Correct connector connection.

Correct the end terminal resistance setup.

Set up address again.

Check noise, etc, and eliminate it if any.

Check code

[E01]

remote controllers (A/B) normal?

Is there no disconnection or

connector contact error on harness out

of terminal block of indoor unit?

Is a group control operation?

Is power of each indoor unit turned on?

Is power applied to remote controller?

AB terminals: Approx. DC18V

Is setup of two remote controllers

without main remote controller?

Communication error between

indoor and remote controller

(Detected at remote controller side)

Is the inter-unit cable of

YES

Check code name

YES

Cause of operation

1. Remote controller inter-unit cable error

2. Indoor power error

3. Indoor P.C. board error

4. Remote controller address setup error

5. Remote controller P.C. board error

Correct inter-unit cable of

Correct connector connection

and check circuit cabling.

Check power connection status of indoor unit. (Turn on power again.)

Check indoor P.C. board.

Change one to main/other to sub.

(Remote controller address connector)

Check remote controller P.C. board.

remote controller.

Defect Replace

Check code

[E03]

This error is detected when the indoor unit cannot receive a signal from the remote controller. Check communication wires of the remote controllers A and B. As communication is impossible, this check code [E03] is not displayed on the main remote controller. It is displayed on TCC-LINK central controller.

Check code

[E04]

Check code name

Communication error between

indoor and remote controller

(Detected at indoor side)

Check code name

Indoor/Outdoor

communication circuit error

(Detected at indoor side)

Cause of operation

No communication from remote controller and communication adaptor

Cause of operation

1. Power of outdoor unit was firstly turned on.

2. Connection error of communication line between indoor and outdoor

3. End ter minal resistance setup error on communication between indoor and outdoor

4. Address setup error

Check code

[E02]

* It is not displayed on 7-segment display of the central control controller.

Is communication cabling between

remote controller and indoor unit correct?

Sending circuit error inside of the remote controller

Replace remote controller.

Check code name

Remote controller sending error

YES

Signal could not be sent to indoor unit. Check the communication wire of the remote

controller.

Cause of operation

Correct the communication cabling.

For details, refer to “Troubleshooting in test operation”.

Page 66

Check code

Is there noise source?

YES

Is setup of end terminal resistance

of outdoor unit normal?

Is inter-unit cable (U1, U2) between

indoor and outdoor short-circuited?

Is connection of inter-unit wire

between indoor and outdoor correct?

Is there no error on

power wire to outdoor unit?

Is F400 (fuse) on

I/F P.C. board opened?

Outdoor I/F P.C. board failure

Replace

Eliminate noise.

Correct power wire.

Correct

communication line.

I/F P.C. board failure However an emergent operation is available by inserting connector to be connected to CN01 to CN33.

Correct short-circuit.

* Check conduction

with tester.

Turn on power to start operation.

Correct setup of end terminal resistance.

[E06]

Auxiliary code : No. of indoor units which received signals normally

Check code name

Decreased number of indoor units

Cause of operation

1. Communication lines (U1, U2) connection error between indoor and outdoor

2. Connector connection error of communication for indoor P.C. board

3. Connector connection error of communication for outdoor I/F board

4. Power supply of indoor unit (Is power turned on?)

Check code

[E07]

Check code name

Indoor/Outdoor

communication circuit error

(Detected at outdoor side)

Cause of operation

1. Indoor/outdoor communication end terminal resistance setup error

2. Indoor/outdoor communication connection error

Is there no miscabling/

disconnection on communication line

betweenindoor and outdoor?

Is connection of CN40 connector

on indoor P.C. board normal?

YES

Is connection of CN01 connector

on outdoor I/F P.C. board normal?

Is power of indoor turned on?

Did a power failure occur?

Is there no noise, etc?

Check indoor P.C. board.

Defect Replace

YES

(NOTE)

1. When signal is not sent for a certain period from the indoor unit which has used to send signals normally, [E06] is displayed.

Correct communication line.

Correct cabling of cable connector.

Turn on power of indoor unit.

Clear the check code.

Check noise, etc, and eliminate it if any.

Page 67

Check code

YES

Are U1, U2, U3, and U4 connectors connected?

Disconnect connector connection

of U1, U2, U3, and U4.

Set up address again.

(Refer to “Address setup procedure”.)

Turn on power of

outdoor unit again.

YES

Did a power failure occur?

Is there no noise source?

Is connection of CN01

connector on I/F P.C. board of

header outdoor unit correct?

Is communication line between

indoor and outdoor normal?

Is connection of CN40 connector

on indoor P.C. board correct?

Is there any connection

error of power wire?

Set up address again

after resetting power supply.

Set up address again after

resetting power supply.

Correct communication line.

Correct connection of connector.

Correct power wire.

Eliminate noise.

[E08]

Auxiliary code : Duplicated indoor address

Check code name

Duplicated indoor addresses

Cause of operation

Indoor addresses are duplicated.

Check code

[E12]

Check code name

Automatic address start error

Cause of operation

1. When indoor automatic address started, other refrigerant circuit system was setting automatic address. (Sub code : 01)

2. When outdoor automatic address started, the indoor automatic address was being set. (Sub-code: 02)

Using a main remote controller (RBC-AMT21E), check the setup item codes (DN code) 12, 13, and 14. When there is no address duplication, check to the following flowchart.

Is cable connection to

communication line normal?

Is not communication line connected

to the different outdoor unit?

Is indoor unit quantity connected

to outdoor unit correct?

Set up indoor address again.

Check code

[E09]

Are two remote controllers set up

as two master remote controllers?

Check code

[E10]

Is there any trouble on power line?

YES

Check code name

Duplicated master

remote controller

YES

Check code name

Communication error

in indoor P.C. board A’ssy

YES

Correct wire connection.

Correct communication line.

Cause of operation

Setup of master remote controller is duplicated.

Correct setup of remote controllers as a master:

a other. (Remote controller address connector)

Check remote controller P.C. board.

Failure Replace

Indoor P.C. board error A’ssy failure

Cause of operation

Check power voltage on line.

Eliminate noise, etc.

Check indoor control P.C. board.

Failure Replace

Auxiliary code : 01: Communication between indoor and outdoor 02: Communication between outdoor units

Check code

[E15]

Check code name

No corresponding indoor unit

during automatic address

Cause of operation

1. Communication line connection error between indoor and outdoor.

2. Indoor power system error

3. Noise from surrounding devices

4. Power failure

5. Indoor P.C. board error

Page 68

Check code

YES

Is a group control operation?

Check indoor address.

Correct indoor address.

Is there any disconnection of

connector or wiring from terminal block

of indoor unit?

Are remote controller

inter-unit wires (A/B) normal?

Are powers of

all indoor units turned on?

Check indoor P.C. board.

Failure

Replace

Check power connection status

of indoor unit.

Correct connection of connector.

Check circuit wire.

Correct remote controller

inter-unit wire.

YES

Are not communication lines (U1, U2)

between indoor and outdoor connected

to multiple outdoor units?

Is communication line between indoor and

outdoor connected to one unit per 1 system?

Check I/F board.

Connect communication line between indoor and outdoor.

Connect communication line between indoor and outdoor to one unit per 1 system.

[E16]

Auxiliary code : 00 : Capacity over 01 : ~ : Number of connected indoor units

Check code name

Connected indoor units

capacity over

1. There are 48 or more connected indoor units.

2. Capacity over of total connected indoor units.

3. Incorrect setup of indoor/outdoor capacity

Cause of operation

Check code

[E18]

Check code name

Communication error between

indoor header and follower

Cause of operation

Regular communication between indoor header and follower is unavailable.

Is backup operation of outdoor unit being set up?

Is No. of connected indoor units correct?

For a service P.C. board, check outdoor HP setup.

Check outdoor interface P.C. board A’ssy.

YES

Is setup of indoor unit HP correct?

YES

Is total capacity of connected

indoor units within 135%? (

YES

(Set up jumper 9, 10, 11, and 12.)

YES

Perform setup of no detection

for capacity over.

Excessive indoor units are connected.

Correct miswiring.

Correct HP setup.

Set capacity of connected

indoor units within 135% of outdoor units.

(Refer “How to exchange interface P.C. board”.)

∗∗

(

∗1) When capacity of the outdoor unit is 12HP,

∗∗

Set up outdoor HP.

up to the maximum capacity 120% of indoor units can be connected.

Check code

[E19]

Auxiliary code : 00: No header unit 02: Two or more header units

Header outdoor units quantity error

Check code name

Cause of operation

1. Misconnection of inter-unit cable between indoor and outdoor

2. Outdoor I/F P.C. board error

Reference)

When the power supply of the outdoor unit is firstly turned on, the check code [E19 00] is displayed until the power supplies of the indoor units are turned on. However it is not an error. If the power supplies of the indoor units are turned on, the check code is automatically reset.

Page 69

Check code

YES

Is outdoor unit setting backup?

Is main power of follower unit turned on?

Is communication line between

outdoor units connected normally?

Is communication connector (CN03)

between follower outdoor units connected?

Correct connector connection.

(Communication connector: CN03)

Check I/F P.C. board.

Clear the error, and then start operation. (*1)

Turn on the main power supply.

Correct connection of communication line.

[E20]

Check code name

Unit connected to other line

during automatic address

Cause of operation

When starting automatic indoor address, a device in other line is connected.

Check code

[E25]

Check code name

Duplicated address setup of

terminal outdoor units

Cause of operation

Addresses are duplicated by manual setting of outdoor address

Auxiliary code : 01: Connection of outdoor in other line 02: Connection of indoor unit in other line

Separate the wire between lines according to address setup method.

Check code

[E23]

Is there no miscabling or

disconnection on communication line

between outdoor units? ( 1)

Is connection of CN03 connector

on outdoor I/F P.C. board normal?

YES

Is not main power of

outdoor unit turned off?

Is the end terminal resistance

between outdoor units turned on?

(SW30 Bit 1)

YES

Check code name

Communication sending error

between outdoor units

YES

Cause of operation

1. Inter-unit cable connection error between outdoor units

2. Communication connector connection error between outdoor units, I/F P.C. board error

3. End ter minal resistance setup error between outdoor units

Correct communication line.

Correct cabling of cable connector.

Turn on main power of outdoor unit.

Turn the end terminal resistance to ON.

Never set up the outdoor address manually.

Check code

[E26]

Auxiliary code : No. of outdoor units which received signals normally

• In this model, only one outdoor unit is provided to one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the other refrigerant line.

Check code name

Decrease of connected

outdoor units

∗∗

(

∗1) How to clear the error

∗∗

Set SW01/SW02/SW03 on I/F P.C. board of header unit to 2/16/1, and push SW04 for 5 seconds or more. (7-segment display: [Er.] [CL])

Cause of operation

1. Outdoor unit backup setup

2. Outdoor power error

3. Communication line connection error between outdoor units

4. Connector connection error for communication

5. Outdoor I/F P.C. board error

Did power failure occur?

Is there no noise source, etc?

Check outdoor I/F P.C. board.

Defect

Replace

YES

Clear check code.

∗∗

(

∗1) In this model, only one outdoor unit is provided to

∗∗

one refrigerant line. Be sure to check there is no communication connection with outdoor unit in the

Check and eliminate noise, etc

other refrigerant line.

Check code

[E28]

Auxiliary code : Detected outdoor unit number

SAn error occurred on the terminal unit. Confirm the check code of the terminal unit using 7-segment display on the I/F P.C. board of the ter minal unit and check it according to the diagnostic procedure for each check code.

Under condition that [E28] is displayed on the 7-segment display of the header unit, when pushing SW04 for 1 second or more, the fan of the outdoor unit which stopped due to the error rotates. If pushing SW05 alone, fan running is released.

Check code name

Terminal outdoor unit error

Cause of operation

Terminal unit error

Page 70

Check code

Correct connection of connector.

Replace TC2 sensor.

Is TC2 sensor connector (CN101: Black)

on indoor P.C. board normally connected?

Are characteristics of TC2 sensor

resistance value normal?

Check indoor main P.C. board.

Defect Replace

YES

Indoor unit temperature sensor characteristics See Characteristics-2.

YES

Correct connection of connector.

Replace TCJ sensor.

Is TCJ sensor connector (CN102: Red)

on indoor P.C. board normally connected?

Are characteristics of TCJ sensor

resistance value normal?

Check indoor main P.C. board.

Defect Replace

Indoor unit temperature sensor characteristics See Characteristics-2.

YES

Correct connection of connector.

Replace TC1 sensor.

Is TC1 sensor connector (CN100: Brown)

on indoor P.C. board normally connected?

Are characteristics of TC1 sensor

resistance value normal?

Check indoor main P.C. board.

Defect Replace

Indoor unit temperature sensor characteristics See Characteristics-2.

[E31]

Check code name

IPDU communication error

Cause of operation

1. Connection error of communication line between IPDU and I/F P.C. board

2. I/F P.C. board error

3. IPDU P.C. board error

4. Exter nal noise

Auxiliary code :

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 error 04: Fan IPDU error 05: IPDU1, fan IPDU error 06: IPDU2, fan IPDU error 07: All IPDU error or communication line error between IPDU-I/F P.C. boards, or outdoor I/F P.C. board error

∗ If the fan IPDU is abnormal, be sure to check the voltage output on the fan power supply P.C. board.

Check code

[F01]

Check code name

Indoor TCJ sensor error

Cause of operation

TCJ sensor Open/Short

Is jumper lead setup of the outdoor I/F P.C. board correct?

Is there no disconnection of communication line

between I/F, fan power supply board, and IPDU?

(Measurement with tester: DC 0 to 5V, 5 pin GND)

1) CN503: Between 1 and 5 pins

2) CN503: Between 2 and 5 pins 7V

3) Between +5V and GND at the side of CN505: 5V

Replace P.C. board according to auxiliary code.

(Jumper 7, 8, 9 ON)

Are communication connectors

between I/F, fan power supply board,

and IPDU connected?

Is there voltage deflection between

4 and 5 pins of CN600 on I/F P.C. board?

Is there voltage deflection between

3 and 5 pins of CN600 on I/F P.C. board?

On the fan power supply P.C. board,

YES

12V

YES

When IPDU (No.1, No.2) and three fan IPDU do not return communication

Connect the jumper lead.

Correct connection of connectors.

Replace communication line.

I/F P.C. board error

IPDU P.C. board error

Replace fan power supply P.C. board.

Auxiliary code

01 02 03 04 05 06 07

P.C. board to be replaced

IPDU1 IPDU2 IPDU1, 2 Fan IPDU IPDU1, fan IPDU IPDU2, fan IPDU IPDU1, 2, fan IPDU, I/F

Check code

[F02]

Check code

[F03]

Check code name

Indoor TC2 sensor error

Check code name

Indoor TC1 sensor error

Cause of operation

TC2 sensor Open/Short

Cause of operation

TC1 sensor Open/Short

Page 71

Check code

[F04]

Check code name

TD1 sensor error

Cause of operation

TD1 sensor Open/Short

Check code name

[F10]

Check code name

Indoor TA sensor error

Cause of operation

TA sensor Open/Shor t

This error code means detection of Open/Short of TD1 sensor. Check disconnection of circuit for connection of connector (TD1 sensor: CN502, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code

[F05]

This error code means detection of Open/Short of TD2 sensor. Check disconnection of circuit for connection of connector (TD2 sensor: CN503, Pink) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code

[F06]

This error code means detection of Open/Short of TE1 sensor. Check disconnection of circuit for connection of connector (TE1 sensor: CN505, Green) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code name

[F07]

Check code name

TD2 sensor error

Check code name

TE1 sensor error

Check code name

TL sensor error

Cause of operation

TD2 sensor Open/Short

Cause of operation

TE1 sensor Open/Short

Cause of operation

TL sensor Open/Short

This error code means detection of Open/Short of TA sensor. Check disconnection of circuit for connection of connector (TA sensor: CN104, Yellow) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace indoor P.C. board.

Check code name

[F12]

Auxiliary code : 01: TS1 sensor 02 : TS2 sensor

This error code means detection of Open/Short of TS sensor. Check disconnection of circuit for connection of connector (TS1 sensor: CN504, White TS2 sensor: CN522, Black) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code name

[F13]

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

This error code means IGBT built-in temperature sensor error. Check connection of connectors CN06 on IPDU P.C. board and CN600 on I/F P.C. board.

If sensor is normal, replace IPDU P.C. board.

Check code name

TS sensor error

Check code name

TH sensor error

Cause of operation

TS1, TS2 sensor Open/Short

Cause of operation

IGBT built-in sensor error in A3-IPDU

This error code means detection of Open/Short of TL sensor. Check disconnection of circuit for connection of connector (TL sensor: CN521, White) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code name

[F08]

This error code means detection of Open/Short of TO sensor. Check disconnection of circuit for connection of connector (TO sensor: CN507, Yellow) and characteristics of sensor resistance value. (Refer to Outdoor unit temperature sensor characteristics.)

If sensor is normal, replace outdoor I/F P.C. board.

Check code name

TO sensor error

Cause of operation

TO sensor Open/Short

Page 72

Check code name

YES

Is not refrigerant by

passed from discharge to

suction of 4-way valve?

Sensor error

Is connection of Ps sensor

connector correct?

Are output voltage characteristics

of Ps sensor normal?

Is there no leakage

from SV4 valve?

Replace SV4 valve.

YES

NO NO

1 Pressure (Check joint) by pressure gauge 2 Pressure display on 7-segment display 3 Output voltage of I/F P.C. board

If 1 and 2, 3 are different, an error of pressure sensor itself is considered. If 2 and 3 are different, check interface P.C. board.

Connector: CN500, White

Correct connection of connector.

Check 4-way valve.

Check compressor.

(Approx. 3 minutes) (Approx. 1 minute)

(Power ON) [SET DATA] is displayed

on main remote controller.

[SET DATA] disappears.

LED (D02) 1Hz flashes for approx. 10 seconds

on indoor unit P.C. board.

Reboot

(Reset)

(Repetition)

[F15]

Check code name

Outdoor temp sensor miscabling

(TE1, TL)

Cause of operation

1. Misinstallation and misconnection of TE1 sensor and TL sensor

2. Resistance characteristics error of TE1 sensor and TL sensor

3. Outdoor P.C. board (I/F) error

Check code name

[F23]

Check code name

Ps sensor error

Cause of operation

Output voltage error of Ps sensor

Are installed positions of

TE1 sensor and TL sensor correct?

Are connection of TE1 sensor connector

and TL sensor connector normal?

Are resistance characteristics of

TL sensor and TE1 sensor normal?

Check outdoor I/F P.C. board.

Defect

TE1 sensor : Outdoor heat exchanger temp sensor TL sensor : Temp sensor between liquid tanks of outdoor PMV1/2

Check code name

[F16]

Are connection of Pd sensor and

Ps sensor connectors correct?

Are output voltage characteristics of

Pd sensor and Ps sensor normal?

Are Pd/Ps output values Pd > Ps

during compressor operation?

Check outdoor I/F P.C. board.

Defect

Outdoor I/F P.C. board

YES

Replace

Outdoor pressure sensor miscabling

YES

Replace

TE1 sensor : CN505, Green TL sensor : CN521, White

Outdoor unit temperature sensor characteristics See TE1 sensor : Characteristics-5. See TL sensor : Characteristics-3.

Check code name

1. High-pressure Pd sensor and low-

(Pd, Ps)

1 Pressure (Check joint) by pressure gauge 2 Pressure display on 7-segment display 3 Output voltage of I/F P.C. board

If 1 and 2, 3 are different, an error of pressure sensor itself is considered. If 2 and 3 are different, check interface P.C. board.

* V alue can be confirmed by 7-segment display function on outdoor I/F P .C. board.

Pd SW01/02/03=1/1/2 Ps SW01/02/03=1/2/2

pressure sensor Ps are exchanged.

2. Output voltage of each sensor is zero.

Correct installed positions of

TE1 sensor and TL sensor.

Correct connection of connectors.

Cause of operation

Correct connection of connectors. Pd sensor: CN501, Red Ps sensor: CN500, White

Sensor error

Check compressor.

Replace

Check code name

[F24]

It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit and output voltage of sensor.

If the sensor is normal, replace outdoor I/F P.C. board.

Check code name

[F29]

This error is detected during operation of air conditioner of IC10 non-volatile memory (EEPROM) on indoor unit P.C. board. Replace service P.C. board.

∗ If EEPROM was not inserted when power was turned on or it is absolutely impossible to read/write EEPROM data,

the automatic address mode is repeated. In this case, [97 error] is displayed on AI-NET central controller.

Check code name

Pd sensor error

Check code name

Indoor other error

Cause of operation

Output voltage error of Pd sensor

Cause of operation

Indoor P.C. board error EEROM error

Page 73

Check code name

YES

YES YES

Operation starts.

Is compressor normal? 2

Check IPDU P.C. board.

Is not it an abnormal overload?

Is case heater output normal?

Is power voltage of

outdoor unit normal?

Does voltage drop occur

when other compressor starts?

Is wiring or connector connection

on IPDU P.C. board normal?

Is there no refrigerant stagnation

in compressor shell?

Correct power line.

Correct cause of overload.

Compressor error

Correct connector connection

or wiring.

Correct refrigerant stagnation

in compressor shell.

1 380 – 415V ± 10%

2 Check the following items mainly.

1. Existence of abnormal sound and abnormal vibration during operation or starting

2. Abnormal overheat of case during operation or stop time (Never touch with hands.)

3. Current of compressor lead during operation or starting time (No varied change of current) change

3 If OCR operates even after manual reset of OCR, check whether the wiring to the

current sensor (T02) of Comp-IPDU is correct or not.

Check case heater.

YES

Does OCR of MG-SW operate?

Reset OCR manually.

YES

Check IPDU P.C. board.

Correct connector connection or cabling.

Wiring or connector connection

on IPDU P.C. board normal?

[F31]

Is there any trouble of

outdoor unit power supply?

Check I/F P.C. board.

Check code name

Outdoor EEPROM error

YES

Cause of operation

1. Outdoor unit power error (Voltage, noise, etc.)

2. Outdoor I/F P.C. board error

Check power voltage and line. Correct power line. Check external noise, etc.

Check code name

[H02]

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Check code name

Compressor error (Lock)

Cause of operation

1. Outdoor unit power line error

2. Compressor circuit system error

3. Compressor error

4. Refrigerant stagnation in compressor shell

5. IPDU P.C. board error

Check code name

[H01]

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Is power voltage of outdoor unit normal?

Note 1

* After checking the output, when connecting the compressor

Does voltage drop occur

when other compressor starts?

Is connection of wiring or connection of connector on IPDU P.C. board normal?

between phases of corresponding

compressor normal? (Note 1)

Is not it an abnormal overload?

Check IPDU P.C. board.

lead again to the compressor terminal, check surely there is no distortion on the Fasten receptacle terminal.

If it is loosened, caulk it with pinchers, etc and then connect lead to the terminal firmly.

Check code name

Compressor breakdown

YES

Is winding resistance

YES

380 – 415V ± 10%

YES

Take off lead cable of compressor.

1. Check resistance between windings: It is normal if there are 0.7

2. Check insulation between outdoor cabinet and terminal: It is normal if there are 10M

1. Outdoor unit power line error

2. Compressor circuit system error

3. Compressor error

4. Cause of abnor mal overload operation

5. IPDU P.C. board error

Correct connector connection or wiring.

to 0.9 .

or more.

Cause of operation

Correct power line.

Compressor error

(Motor burning, etc.)

Correct cause of overload.

Details of compressor

power connecting section

Check code name

[H03]

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Check code name

Current detective

circuit system error

Cause of operation

1. Cabling or connector connection error on IPDU P.C. board

2. IPDU P.C. board error

Page 74

Check code name

Is there clogging on whole valve?

Is outdoor fan normally

operated in heating season?

1 Pressure by pressure gauge (Check joint) 2 Pressure display on 7-segment display 3 Output voltage of I/F P.C. board

If 1 and 2, 3 are different, an error of pressure sensor error is considered. If 2 and 3 are different, check I/F P.C. board.

Check miscabling, misinstallation and connector connection.

(Check with miscabling check function of outdoor unit.)

YES

Open service valves fully.

Exchange low-pressure sensor.

Correct SV2 and SV4 circuits.

Correct cabling.

Are characteristics of low-pressure sensor normal?

Is not indoor unit with different circuit connected?

Is flow selector normal?

Are SV2 and SV4 circuits normal?

Are service valves of gas and

liquid pipe of outdoor unit fully opened?

Is there no mispiping of discharge gas

and suction gas main pipes?

Does indoor fan normally

operate in cooling season?

Is outdoor PMV normal?

Is indoor PMV normal?

(A) Cooling

Is there clogging of indoor

air filter or heat exchanger?

Is there clogging of

outdoor heat exchanger?

Is connector connection

or coil normal?

YES

Check indoor P.C. board.

Failure

Replace

YES

Correct piping.

Check flow selector.

Repair faulty parts.

Replace PMV body.

Repair faulty parts.

Are following items concerned

to indoor fan motor normal?

1. Connector connection

2. Condenser

3. Motor

4. Fan

Cleaning

In cooling season, go to (A), In heating season, go to (B)

Check outdoor

I/F P.C. board.

Failure

Replace

Refrigerant shortage,

clogging, pipe deformed

Refrigerant shortage or

clogging or pipe deformed

(B) Heating

Cleaning

Is indoor fan system normal?

• Fan crack

• Fan coming-off

[H04] [H14]

Check code name

Compressor 1 case thermo operation Compressor 2 case thermo operation

Cause of operation

1. Case thermo circuit error

2. I/F P.C. board error

3. Ser vice valve closed

4. Outdoor PMV clogging

5. SV4 valve leak, Coil misinstallation

6. 4-way valve error

7. Compressor error

8. Refrigerant shortage

Check code name

[H06]

Check code name

Low-pressure protective operation

Cause of operation

1. Ser vice valve close

2. Ps sensor error

3. SV2, SV4 circuit error

4. Miscabling of communication between indoor and outdoor

5. Indoor/outdoor fan and condenser error

6. Indoor/outdoor PMV clogging

7. Indoor/outdoor heat exchanger clogging

8. Refrigerant shortage

Is case thermo circuit normal?

1. Connector connection

2. Wiring

3. I/F P.C. board (Note 1)

Are service valves of gas pipe and liquid pipe of outdoor unit fully opened?

Are outdoor PMV1/2/3 normal?

1. Connector connection

2. Wiring 3. Coil

4. Valve body 5. I/F P.C. board

Are SV41 and SV42

Valve circuits normal?

1. Misinstallation installation and connector connection of SV41 and SV42

2. Leakage from SV41, 42 circuit

YES

Operation starts.

YES

Does not refrigerant

bypass from discharge of

suction through 4-way valve?

Is not refrigerant bypassed from discharge to suction?

Is compressor normal? (Note 2)

Is flow selector unit normal?

Refrigerant shortage,

clogging, pipe breakage

YES

(Note 1)

1. Case thermo is usually closed.

2. Operation temperature of case thermo is 120˚C.

Connector CN300, 301, White

SV4 valve: Connector CN311, Blue

YES

(Note 2) Check the following items mainly.

1. Existence of abnormal sound and abnormal vibration during operation at start time

2. Abnormal overheat of case during operation or stop (Never touch with hands.)

3. Current of compressor lead during operation or starting (No rapid current change) YES

(After checking there is no slogging or pipe breakage, charge refrigerant again.)

Repair case thermo circuit.

Open service valves fully.

Repair outdoor PMV.

Correct SV4, SV5, SV11

Check flow selector unit.

Check 4-way valve.

Compressor error

valve circuits.

Check piping.

Page 75

Check code name

[H07]

Check code name

Oil level down

detection protection

1. Valves of balance pipes closed.

2. Miscabling or misinstallation of TK1 to TK4 sensors

3. TK1 to TK4 sensor error

4. Gas leak or oil leak of all outdoor units

5. Refrigerant stagnation of compressor case

6. SV3A, 3B, 3D, 3C, 3E valve error

7. Clogging of oil retur n circuit from oil separator

8. Clogging of oil-equation circuit system

Are TK1, TK2, TK3, and

TK4 sensors connected correctly?

Is there no sensor coming-off or misinstallation?

YES

Are TK1 and TK2 sensors connected correctly?

Is there no sensor coming-off or misinstallation?

Are sensor characteristics normal?

YES

Check leakage of SV6 circuit.

Normal

Check whether there is setup missing

of cooling only indoor unit.

Normal

Are characteristics of TK1 to TK4 normal?

YES

Check gas leak of outdoor unit.

Check oil stain in the

( )

machine room of outdoor unit.

Normal

Is the flow selector unit normal?

YES

Check accumulation of

refrigerant in compressor case.

Refrigerant accumulation

Correct accumulation of

refrigerant in compressor case,

reset power supply and

then start operation.

Check oil level judgment

of each compressor.

Are all the oil levels appropriate?

YES

Eliminate cause of accumulation.

Indoor/outdoor PMV error (Cause of refrigerant accumulation) Discharge check valve error, etc.

SW01/02/03=1/16/1 are displayed on 7-segment display.

Characteristics-2

Abnormal

Characteristics-4

Abnormal

( 1) Check leakage of solenoid valve. (SV3C)

Check clogging.

(SV3E)

No leakage or clogging

( 2) Check clogging in oil

recovery circuit of the oil separator.

(Capillary, Strainer)

Check clogging of SV3D valve.

No clogging

Check clogging of oil-equation circuit.

(

(Reference) If refrigerant is accumulated in the compressor case, oil level short may be judged.

Cause of operation

Correct miswiring and misinstallation.

TK1: CN514, TK2: CN515

( )

TK3: CN516, TK4: CN523

Correct miswiring and misinstallation.

(TS1: CN504, TS2: CN522)

Sensor error Replace

Replace defective parts.

Set up to cooling only operation mode. Item code (DN) OF Cooling only operation mode: 0001

Sensor error Replace

Specify a position where

gas leaked and repair it.

(Recharge, refill oil.)

Repair the flow selector unit.

YES

Clogging

Replace defective parts

In some cases, it may be difficult to check the leakage of clogging in the following condition of refr igerant stagnation in low ambient temperature condition.

In this case, take a longer operating time prior to check. (Criterion: Discharge temperature of TD1 and TD2 are 60°C or higher)

(*1) a) Leakage check for SV3A valve (For multiple outdoor unit system)

• Turn off the power supply, take off connector of SV3A valve, and then start a test operation after power-ON.

• Check the temperature change at secondary side of SV3A valve during operation . (

in the figure.)



→ If temperature is raised, it is a leakage of SV3A valve. Replace SV3A valve.

b) Leakage check for SV3C valve

• Turn off the power supply, take off connector of SV3C valve, and then start a test operation after power-ON.

• After operation for several minutes, check temperature at secondary side of SV3C valve. (

→ If temperature is high (equivalent to discharge temperature TD), it is a leakage of SV3C valve. Replace

SV3C valve. (Even if there is leakage from SV3C valve does not occur, temperature of SV3C valve at secondary side rises during operation. When the checked temperature is equivalent to TD temperature, it is a leakage of SV3C valve. Replace SV3C valve.)

in the figure.)



c) Clogging check for SV3B v alve (For multiple outdoor unit system)

• While outdoor unit is operated, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04 for 2 seconds or more.

• Set up SW02 = [9], and turn on SV3A, SV3B, SV3C valves. (7-segment display [Hr] [ 3–])

• While outdoor unit is operating, check temperature change at secondary side of SV3B valve. (

→ If temperature does not rise (equivalent to suction temperature), it is a clogging of SV3B valve.

Replace SV3B valve.

in the figure.)



d) Clogging for SV3E valve

Reset the power supply.

Referring to “Valve forced open/close function” of the outdoor unit, check ON/OFF operation (Sound, coil surface temp up) of SV3E valve is performed.

Start test operation in COOL or HEAT mode.

After operation for several minutes, check the pipe temperature at the secondary side of SV3E valve whether temperature changes or not. If it is equivalent to outside temperature, clogging of SV3E is considered. (



in the figure.)

(Reference)

If SV3E valve is clogged, temperature of all TK1, TK2, TK3, and TK4 do not change.

(*2) Clogging check for SV3D valve of oil return circuit from oil separator a) Oil return circuit

• While outdoor unit is operating, check temperature (secondary side of capillary) on oil return circuit. (

in the figure.)



→ If temperature is low equivalent to suction temperature), a clogging of strainer of oil return circuit or capillary

is considered. Repair the clogged part.

b) Clogging check for SV3D valve

• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04 for 2 seconds or more.

• Set up SW02 = [6], and turn on SV3D valve. (7-segment display [Hr] [ 3d])

• If temperature is low at secondary side of the valve or it does not change, clogging of valve, capillary, or strainer

is considered. (

in the figure.)



Page 76

Is not TK1 sensor detached?

Is there no miscabling or misinstallation

on TK1/TK2/TK3/TK4 sensors?

Start a test operation in COOL or HEAT mode. TK1 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [11] [2]. Check TK1 sensor temp approx. 10 minutes after compressor 1 has operated.

If low temperature continues (approximately outside temp) or temperature does not almost change, a clogging of strainer of oil-equalization circuit, clogging of capillary tube, or malfunction of check valve is considered.

(Note 1) Refer to item [H07] error.

* Outdoor unit temp sensor characteristics-4

* Characteristics-4

Correct miscabling/misinstallation.

TK1: CN514 TK2: CN515 TK3: CN516 TK4: CN523

( )

YES

Check I/F P.C. board

Correct installation of sensor.

Are characteristics of TK1 sensor

resistance value normal?

Check the clogging of SV3E valve.

(Note 1)

No error

Error

No error

Sensor error

Replace clogged part.

Replace SV3E valve.

Strainer

Compressor 1

Oil tank

Capillary tube

TK1

(*3) Check for solenoid valve of outdoor unit (For multiple outdoor unit system) a) Clogging check for SV3A valve

• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04 for 2 seconds or more.

• Set up SW02 = [4], and turn on SV3A valve. (7-segment display [Hr] [ 3A])

• If temperature is low at secondary side of the valve or it does not change, clogging of valve or check valve is

considered. (

in the figure.)



b) Leakage check for SV3C valve

• While outdoor unit is operating, set up SW01/02/03 = [2] [1] [3] to 7-segment display [Hr] [ 2], and push SW04 for 2 seconds or more.

• Set up SW02 = [6], and turn on SV3C valve. (7-segment display [Hr] [ 3C])

• If temperature does not change (up), clogging of valve or strainer is considered. (

in the figure.)



(*4) a) Clogging check for oil-equalization cir cuit

• Drive the outdoor unit. (Drive both compressors in the unit.)

• After driving for 10 minutes, check temperature of TK1 and TK2 sensors and temperature of oil-equalization

circuit capillary (

(Criterion)

TK1, TK2=Td1, Td2 temperature – Approx. 10 to 30°C Oil-equalization capillary tubes should be higher sufficiently than outside air temperature and suction temperature.

• If temperature is low, a malfunction of capillary, strainer, or check valve is considered. Repair the defective parts.

in the figure) were raised.



High-pressure

Check joint

sensor

Oil

separator

(SV2)

Check code name

[H08]

Check code name

Oil level detective

temperature sensor error

Cause of operation

TK1 to TK4 sensor Open/Short

Auxiliary code : 01: TK1 sensor error 02: TK2 sensor error 03: TK3 sensor error 04: TK4 sensor error

The detected error is an oil level detective temperature sensor error. Check disconnection of the wiring and resistance value of the sensor.

If the sensors are normal, replace the outdoor I/F P.C. board.

Check code name

[H16]

TK1 temperature detective circuit error

Check code name

(Auxiliary code : 01)

Circuit

TK1 TK2 TK3 TK4

Connector

CN514 (Black) CN515 (Green) CN516 (Red) CN523 (Yellow)

Cause of operation

1. Coming-off of TK1 sensor, miscabling, characteristics error of resistance value

2. Oil-equalization circuit error (Check valve, capillary clogging, strainer clogging)

3. Refrigerant stagnation in case of compressor shell

(SV3D)

Solenoid valve (SV41)

High-pressure SW

(SV3E)

Strainer

(TD1)

Compressor 1

Balance pipe Packed valve

Sensor (TK3)

Strainer Strainer

(Inverter)

(TK1)

(TK4)

Solenoid valve

(SV42)

High-pressure

Sensor (TD2)

(Inverter)

Compressor 2

(TK2)

Oil tank

(SV3A)

Solenoid valve (SV3B)

Check

valve

Page 77

Check code name

Is not TK3 sensor come off?

Is there no miscabling or misinstallation

on TK1/TK2/TK3/TK4 sensors?

Start a test operation in COOL or HEAT mode. TK3 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [13] [2]. Check TK3 sensor temp approx. 10 minutes after compressor 2 has operated.

If low temperature continues (approximately outside temp) or temperature does not almost change, a clogging of parallel capillary is considered.

(Note 1) Refer to item [H07] error.

* Outdoor unit temp sensor characteristics-4

Correct miscabling/misinstallation.

TK1: CN514 TK2: CN515 TK3: CN516 TK4: CN523

( )

YES

Check I/F P.C. board

Correct installation of sensor.

Are characteristics of TK3 sensor

resistance value normal?

Check the clogging of SV3E valve.

(Note 1)

No error

Error

No error

Sensor error Replace

Replace clogged part (Capillary).

Replace SV3E valve.

SV3E valve

Strainer

TK3

After power reset, check capillary choke of SV3C valve bypass.

[H16]

Check code name

Oil level detective circuit system error

(Auxiliary code : 02)

Cause of operation

1. Detachment of TK2 sensor, miscabling, characteristics error of resistance value

2. Oil-equalization circuit error (Check valve, capillary clogging, strainer clogging)

3. Refrigerant stagnation in compressor shell

Check code name

[H16]

Check code name

TK3 temperature detective circuit error

(Auxiliary code : 03)

Cause of operation

1. Detachment of TK3 sensor, miscabling, characteristics error of resistance value

2. Error of SV3C valve circuit periphery (Check capillary clogging, strainer clogging)

3. Refrigerant stagnation in compressor shell

Is not TK2 sensor detached?

Is there no miscabling or misinstallation

on TK1/TK2/TK3/TK4 sensors?

Are characteristics of TK2 sensor

resistance value normal?

YES

Does OCR of MG-SW operate?

YES

Outdoor unit temp sensor characteristics-4

YES

After power reset

Start a test operation in COOL or HEAT mode. TK2 sensor temp is displayed on 7-segment display with SW01/02/03=[1] [12] [2]. Check TK2 sensor temp approx. 10 minutes after compressor 2 has operated.

If low temperature continues (approximately outside temp) or temperature does not almost change, a clogging of strainer of oil-equalization circuit, clogging of capillary, or malfunction of check valve is considered.

Check the clogging of SV3E valve.

No error

(*1)

No error

Check I/F P.C. board

Error

1 Refer to item [H07] error.

2 If OCR operates even after manual reset of OCR, check whether the wiring to the

current sensor (T02) of Comp-IPDU is correct or not.

Error

Capillary tube

Oil tank

Replace SV3E valve.

Correct installation of sensor.

Correct miscabling/misinstallation.

TK1: CN514 TK2: CN515 TK3: CN516

( )

TK4: CN523

Sensor error

Reset OCR manually.( 2)

Replace clogging part.

Compressor 2

Strainer

TK2

Page 78

Check code name

YES

Correct the line address setup.

Correct the cable connection.

Is there duplicated line address setup?

Are communication cable connections of

[U1.U2], [U3.U4], and [U5, U6] normal?

Check outdoor I/F P.C. board.

Failure

Replace

Re-set up the address.

(Refer to “Address setup”.)

[H16]

Check code name

TK4 temperature detective circuit error

(Auxiliary code : 04)

Cause of operation

1. Detachment of TK4 sensor, miscabling, characteristics error of resistance value

2. Check clogging and malfunction of SV3E valve circuit.

3. Oil-equalization circuit error (Check capillary clogging, strainer clogging)

4. Refrigerant stagnation in compressor shell

Check code name

[L04]

Check code name

Duplicated setup of outdoor line address

Cause of operation

Outdoor line addresses are duplicated.

Is not TK4 sensor detached?

Is there no miscabling or misinstallation

on TK1/TK2/TK3/TK4 sensors?

Are characteristics of TK4 sensor

resistance value normal?

YES

Does OCR of MG-SW operate?

Check the clogging of SV3E valve.

Check code name

(

Error

Replace SV3E valve.

[L03]

1) Check the connection changing of the remote controller after the connection has been changed.

2) If the group configuration and address are normal when power has been turned on, the mode automatically shifts to address setup mode. (Re-setup of address) → Refer to “Address setup”.

YES

No error

1 Refer to item [H07] error. 2 If OCR operates even after manual reset of OCR, check whether the wiring to the

current sensor (T02) of Comp-IPDU is correct or not.

Check code name

Duplicated indoor header units

There were two or more indoor header units in some remote controller group control.

Correct installation of sensor.

Correct miscabling/misinstallation.

TK1: CN514 TK2: CN515 TK3: CN516

( )

TK4: CN523

Sensor error Replace

Reset OCR manually.( 2)

Check I/F P.C. board

Cause of operation

Check code name

[L05]

This check code is displayed on the set indoor unit when setup of indoor unit with priority is duplicated.

• Priority setup with two or more units is not available. Choose one prior unit in one refrigerant circuit system.

Check code name

[L06]

Auxiliary code : No. of indoor units with priority

When indoor unit with priority is duplicated, this check code is displayed on the unit other than the setup indoor unit and outdoor unit.

• As only one indoor unit with priority is valid, change the setup.

Duplicated indoor units with priority

(Displayed on indoor unit with priority)

Duplicated indoor units with priority

(Displayed on the indoor unit other than

one with priority and on the outdoor unit)

Check code name

Cause of operation

1. Two or more prior indoor units exist.

Cause of operation

Two or more indoor units with priority are duplicated.

Page 79

Check code name

∗ Using 7-segment on I/F P.C. board, check the model name for each outdoor unit.

For check, when putting the rotary switch on SW01/02/03=16/16/16, it is an outdoor I/F P.C. board for Super Module Multi Flex if “F” is displayed at the left side of 7-segment [A] part.

Is the check code [L17]

displayed even if turning on again

power of all the connected outdoor

units on 1 system alone?

Are all the connected

outdoor I/F P.C. boards on 1 system

P.C. boards of outdoor units for

Super Module Multi Flex?

Check again whether there is any other outdoor unit or not on the communication line in 1 system. If any, turn off power of the corresponding outdoor unit and then check once more.

Replace outdoor units of other models with outdoor units purposed for flex.

Correct communication line between outdoor units.

Change the incorrectly built-in outdoor I/F P.C. boards with I/F boards for Super Module Multi Flex.

Are the connected outdoor

units those for flex on 1 system?

(Check model name.)

YES

[L07]

Is there group cabling?

Check indoor P.C. board.

Failure ® Replace

Check code name

[L08]

Check code name

Group line in individual indoor unit

YES

Check setup item code

DN 12, 13, and 14 addresses.

There is individual indoor unit.

Check code name

Indoor group / address unset

Cause of operation

The group line is connected in the individual indoor unit.

Item code (D1) 12: Line address Item code (D2) 13: Indoor address Item code (D3) 14: Group address

YES

Indoor address unset

Correct indoor group address.

Cause of operation

Check code name

[L10]

I/F P.C. board A’ssy service for the outdoor unit is common to this series. A setup for model selection different from that for P.C. board with trouble is necessary. Set up a model based upon the P.C. board A’ssy exchange procedure.

Check code name

[L17]

Check code name

Outdoor capacity unset

Check code name

Inconsistent models of

outdoor units

Cause of operation

On the outdoor IF P.C. board for service, the model selecting jumper has not been set up so as to match with the model.

Cause of operation

There are outdoor units on the communication line other than Super Module Multi Flex type such as Super Module Multi or Super Module Multi ice regenerative type

Are powers of all the

indoor units turned on?

Disconnect connectors between

[U1, U2] and [U3, U4].

Clear addresses.

(Refer to “Address clear”.)

Re-execute address setup. (Refer to “Address setup”.)

Note) This code is displayed when the power is turned on at the first time after installation.

(Because the address is not yet set up)

Check code name

[L09]

Are capacity setups

of indoor units unset?

YES

Check code name

Indoor capacity unset

YES

Indoor capacity unset

Turn on the power of indoor units.

Turn on the power of outdoor unit again.

Cause of operation

Set up capacity data of indoor unit.

(Setup item code (DN) = 11)

Check indoor P.C. board.

Defect

Replace

Page 80

Check code name

Replace IPDU P.C. board with trouble.

Correct connection of connector.

Replace communication line.

I/F P.C. board error

IPDU P.C. board error

Correct connection of connector.

Is there voltage fluctuation between

4 and 5 pins of CN600 on I/F P.C. board.

(Measurement by tester: DC0 to 5V, 5 pin GND)

Is there voltage fluctuation between

3 and 5 pins of CN600 on I/F P.C. board.

(Measurement by tester: DC0 to 5V, 5 pin GND)

Is jumper setup of outdoor I/F P.C. board correct?

(Jumpers 7, 8, 9 ON)

Is communication connector between IPDU and

I/F P.C. board connected?

Is there no disconnection of communication

line between IPDU and I/F P.C. board?

Both IPDU (No.1, No.2) and fan IPDU did not return the communication.

YES

Replace fan power supply P.C. board.

Auxiliary code

01 02 03 04 05 06 07

P.C. board to be replaced

IPDU1 IPDU2 IPDU1, 2 Fan IPDU IPDU1, fan IPDU IPDU2, fan IPDU IPDU1, 2, fan IPDU, I/F

On the fan power supply P.C. board,

1) CN503: Between 1 and 5 pins

12V

2) CN503: Between 2 and 5 pins 7V

3) Between +5V and GND at the side of CN505: 5V

[L18]

Did set up All cooling

to All cooling indoor unit?

YES

Check code name

Flow selector unit system error

Cause of operation

An indoor unit which has been operated in cooling only mode is operated in heating mode without setup for cooling only mode.

Set up All cooling mode. Item code (DN)=OF Cooling only operation mode=0001

Check flow selector unit.

Check code name

[L29]

Auxiliary code :

01: IPDU1 error 02: IPDU2 error 03: IPDU1, 2 error 04: Fan IPDU error 05: IPDU1, fan IPDU error 06: IPDU2, fan IPDU error 07: All IPDU error or disconnection of communication line between IPDU-I/F P.C. board or outdoor I/F P.C. board error

Check code name

IPDU quantity error

Cause of operation

1. Incorrect model setup in service for I/F P.C. board

2. Communication error between IPDU, fan IPDU and I/F

3. IPDU, fan IPDU, I/F P.C. board error

Check code name

[L20]

Are not two or more

central control system identical

network addresses connected?

Check code name

[L28]

Is No. of connected

outdoor units below 3 units?

YES

Is communication line between

outdoor units correctly connected?

Check outdoor I/F P.C. board.

YES

Check code name

Duplicated central control addresses

YES

Check code name

Quantity over of

connected outdoor units

Cause of operation

Central control addresses are duplicated.

Correct the network address

of the central control system.

Check the network adaptor

on the indoor P.C. board.

1. Quantity over of connected outdoor units

2. Connection error of communication line between outdoor units

3. Outdoor I/F P.C. board error

Cause of operation

Max. 3 units are allowed for flex system.

Correct connection of communication line.

Page 81

Check code name

Are service valves of

outdoor discharge gas, suction gas,

and liquid pipe fully opened?

* Connector CN300, 301 White

(Check there is no pipe breakage, and then recharge refrigerant.)

Is resistance characteristic

of TD1 sensor normal?

Is not indoor unit in other

refrigerant line connected?

Check mispiping of discharge gas /

suction gas main pipes.

Is there no refrigerant leakage of

discharge gas to suction side in 4-way valve?

Refer to Outdoor unit temperature sensor characteristics-4.

YES

Normal

YES

Abnormal

Are outdoor PMV1 and PMV2 normal?

1. Connector connection

2. Wiring

3. Coil

4. Valve itself

5. Outdoor P.C. board

SV4 circuit

1. Are not coils of SV41 and SV42 valves mounted reversely?

2. Is no leakage from SV41?

Check leakage of SV5 circuit.

Is the flow selector unit normal?

Check clogging of SV6 circuit.

Refrigerant short, clogging, pipe breakage

Open service valves fully.

Repair outdoor PMV.

Replace TD1.

Check 4-way valve.

Correct mounting of valve coils

or replace SV41 valve.

Replace defective parts.

Correct piping.

Repair flow selector unit.

Correct wiring.

[L30]

Is outside device connected

to connector CN80?

YES

Does outside device correctly operate?

YES

Check cause of the operation.

Interlock in indoor unit

Check code name

from outside

Cause of operation

Outside error was input.

Check indoor P.C. board.

Replace

Failure

Check outside device.

Failure

Replace

Check code name

[P03]

Check code name

Discharge temp TD1 error

Cause of operation

1. Service valve of outdoor unit closed.

2. Outdoor PMV1, 2 error

3. TD sensor error

4. Refrigerant short, clogging in pipe

5. 4-way valve error

6. SV4 circuit leakage, misinstallation

7. SV5 circuit leakage

8. SV6 circuit clogging

9. Discharge gas/Suction gas pipes mispiping

10. Flow selector unit error

Check code name

[L31]

Is there any trouble of

outdoor unit power supply?

Check outdoor I/F P.C. board.

Check code name

[P01]

* For the models installed with AC fan motor only

Is there no connection error or

disconnection of CN076 connector?

Is not there mechanical lock of fan motor?

Check code name

Extended IC error

YES

Check code name

Indoor fan motor error

YES

1. Outdoor unit power error

2. Outdoor I/F P.C. board error

1. Cabling error

2. Check fan motor.

Cause of operation

Check power voltage and line. Check auxiliaty noise, etc.

Cause of operation

Correct cabling circuit for

the connector connection.

Replace fan motor.

Check indoor P.C. board.

Failure

Replace

Page 82

Check code name

( )

Refrigerant overcharge, clogging, pipe breakage, abnormal overload condition

All heating operation

Check indoor P.C. board.

Failure

Replace

Repair

faulty parts.

Replace TC2

or TCJ sensor.

Replace PMV body.

Is SV4 circuit normal?

Is SV11 circuit normal?

Are connector connection,

heat exchanger, fan, and

fan motor normal?

Are characteristics of TC2

and TCJ sensor resistance

value normal?

Is connector

connection,

coil normal?

Repair SV4 circuit. Coil error, clogging,

disconnection of wiring, etc.

Are not indoor units of different

refrigerant circuit connected?

Is there clogging

of valve?

Is indoor

PMV normal?

Does heating indoor fan

normally operate?

Repair

faulty parts.

A C All heating operation

Repair faulty position.

Refrigerant overcharge, clogging,pipe breakage, abnormal overload condition

Check and correct the cabling.

Check with miscabling check function of outdoor unit.

Eliminate the interfered causes.

Is there a cause to

interfere operation of

indoor heat exchanger? 1 Air filter clogging 2 Heat exchanger clogging 3 Air short circuit

YES

Is 4-way valve normal?

Replace 4-way valve.

YES

( )

[P04]

Check code name

Actuation of

high-pressure SW

Cause of operation

1. High-pressure SW error

2. Ser vice valve closed

3. Pd sensor error

4. Indoor/outdoor fan error

5. Indoor/outdoor PMV choke

6. Indoor/outdoor heat exchanger clogging, air short circuit

7. SV2 circuit error

8. SV4 circuit error

9. SV5 circuit error

10. Discharge line check valve malfunction

11. Refrigerant overcharge

Auxiliary code : Compressor 1 side 02: Compressor 2 side Note) High-pressure SW is normally closed.

Does high-pressure SW operate?

Are parts of high-pressure SW normal?

discharge/suction gas main pipes.

Check operation of PMV3 SV12 valve.

Reset power supply, and start a test operation corresponded to the season.

high-pressure sensor normal?

Does cooling outdoor fan normally operate?

Is there a cause to interfere operation

of heat exchanger of outdoor unit?

1. Heat exchanger clogging

2. Air short circuit

YES YES

Is service valve fully opened?

Check mispiping of

Is the flow selector normal?

Are characteristics of

B All cooling operation

Is SV2 circuit normal?

YES

Normal

Abnormal

All cooling operation All heating operation

YES

(B contact)

Is circuit cabling normal?

To B To C

Is there no crack or

coming-off of fan?

YES

NONO

Check and correct cabling.

Check I/F P.C. board.

Failure Replace

Check parts.

Failure

Replace

Open service valve fully.

Correct piping.

Replace defective parts.

Repair the flow selector unit.

Replace the high-pressure sensor.

Repair faulty parts.

Connector connection, fan IPDU, fan motor, wiring

Eliminate the interfered causes.

Repair SV2 circuit.

Coil error, clogging,

( )

disconnection of wiring, etc.

Check code name

[P05]

Check code name

Open phase, negative phase

• Check the phase power line of outdoor unit.

• Check error of outdoor I/F P.C. board.

• Check there is no looseness, etc of terminal.

Cause of operation

1. Power supply open phase

2. Power supply negative phase

Page 83

Turn off power supply.

Correct connector connection.

Check indoor P.C. board (MCC-1402).

Failure ® Replace

Is resistance value at motor side of

fan motor connector CN334 on indoor P.C. board

(MCC-1402) correct? *2

Is resistance value between each phase

at motor side of fan motor connector CN333 on

indoor P.C. board (MCC-1402) correct? *1

Is there connection error or

disconnection on connector CN333, CN334

of indoor P.C. board (MCC-1402)?

Is output of indoor fan motor position

detective signal correct? *3

Does fan turn without trouble

when turning it with hands?

Remove connectors CN333 and CN334

on indoor P.C. board (MCC-1402).

Check resistance value of fan motor position detective circuit.

• Is not winding 1 (Yellow lead) to 4 (Pink lead) opened/shorted? ® Resistance should be 5 to 20k

Check fan motor position detective signal.

• Measure voltage with tester between CN334 1 and 5 on indoor P.C. board (MCC-1402) under condition of CN333 and CN334 installed and power-ON.

Turn fan slowly with hands so that pin voltage

fluctuates

between 0 and 5V.

• Between 4 and 5: 5V

• Is not winding 1 (Red lead) to 3 (White lead), 3 (White lead) to 5 (Black lead), 5 (Black lead) to 1 (Red lead) opened/shorted? ® Resistance value should satisfy the follows.

• Is not grounded between cabinet and 1, 3, 5? ®

Should be

10W or more

Replace indoor fan motor.

YES

CN333

CN334

Detectable in model with DC fan motor 4-way Air Discharge Cassette or Concealed Duct Standard type Under Ceiling, High Wall or Compact 4-way Air Discharge Cassette type

( )

Check code name

[P07]

Check code name

Heat sink overheat error

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Cause of operation

1. Power voltage error

2. Outdoor fan system error

3. Heat sink installation error

4. Clogging of hear sink cooling duct

5. IPDU P.C. board error (TH sensor error)

Check code name

[P12]

Check code name

Indoor fan motor error

Cause of operation

1. Cabling error of fan motor connector

2. Fan motor error

3. Indoor P.C. board error

Is power voltage normal?*

YES

Is wiring of IPDU normal?

YES

Is indoor fan normal?

YES

Is screw between IPDU and heat sink loosened?

s there no clogging of heat sink cooling duct?

Check IPDU P.C. board.

Check code name

[P10]

Auxiliary code : Indoor address with trouble

Is float SW connector

(Indoor control P.C. board CN34)

connected normally?

Does float SW operate? Is wiring normal?

Does drain pump operate?

YES

Check drain pipe, etc.

NO * 380–415V ± 10%

YES

Check code name

Indoor overflow error

1. Float SW operation error

Correct power line.

Correct wiring such as cable to compressor or connector connection.

Check fan and fan motor.

Tighten screws.

Correct clogging.

Cause of operation

2. Drain pump operation error

3. Clogging of drain pipe

4. Indoor P.C. board error

YESYES

YES

NONO

Check and correct wiring.

• Check there is 380–415V voltage of 1-3 pin of CN68 on indoor P.C. board.

Correct

connector connection.

Check indoor P.C. board.

Failure

Replace

Is power supply to

drain pump normal?

Replace drain pump,

and check cabling.

Page 84

Check code name

( )

Open service valves fully.

Repair outdoor PMV.

Replace TS2 sensor.

Check and replace 4-way valve and coil.

Repair SV41 and SV42 circuits.

Are service valves at gas and

liquid side fully opened?

Are characteristics of

TS2 sensor resistance normal?

Is there no leakage of

SV41 and 42 valve circuits?

Refrigerant shortage,

clogging, pipe breakage.

Connectors CN300, 301 White

Refer to outdoor unit temperature sensor characteristics-3.

(Check there is no clogging and pipe breakage, and then recharge refrigerant.)

Coil, valve body, disconnection of cable, etc

Is outdoor PMV1, 2 normal?

1. Connector connection

2. Wiring

3. Coil

4. V alve body

5. Outdoor I/F P.C. board

Normal

YES

Correct piping.

Check mispiping of discharge gas/

suction gas main pipes.

YES

Abnormal

Repair the flow selector unit.

Abnormal

Does not discharge

refrigerant gas bypass to suction side

through 4-way valve?

Is the flow selector unit normal?

[P13]

Check code name

Outdoor liquid back detection error

Cause of operation

1. PMV1/PMV2 error

2. Pd sensor, Ps sensor error

3. Clogging of SV2 circuit

4. Clogging of SV3B circuit, balance pipe

5. Leakage of main discharge pipe

6. Outdoor I/F P.C. board error

Check code name

[P15]

Check code name

Gas leak detection

TS condition (Auxiliary code : 01)

Cause of operation

1. Outdoor unit service valve closed

2. Outdoor PMV error

3. TS1 sensor error

4. Refrigerant shortage, clogging refrigerant circuit

5. 4-way valve error

6. SV4 circuit error

Are connections of outdoor

PMV1/PMV2 connectors correct?

Are operations of outdoor

PMV1/PMV2 normal?

Are characteristics of Pd sensor/Ps sensor

output voltage normal?

Is SV2 valve coil correctly connected?

Is there no miswiring or

misinstallation on TS1 and TS2 sensors?

Check I/F P.C. board.

YES

Correct connector connection.

(CN300, CN301)

PMV error

Pd sensor/Ps sensor error

Correct connector connection.

(CV2: CN302)

Correct miswiring/installation

Page 85

Check code name

Open service valves fully.

Repair outdoor PMV.

Replace TD2 sensor.

Check 4-way valve.

Correct cabling.

Are service valves of gas and

liquid sides fully opened?

Are characteristics of

TD2 sensor resistance normal?

Refrigerant shortage, clogging, pipe breakage.

* Connectors CN300, 301 White

* Refer to outdoor unit

temperature sensor characteristics-4.

(Check there is no pipe breakage, and then recharge refrigerant.)

Is outdoor PMV normal?

1. Connector connection

2. Cabling

3. Coil

4. V alve body

5. Outdoor I/F P.C. board

SV4 circuit

1. Are not SV41 and SV42 valve coils installed reversely?

2. Is there no leakage through SV42 circuit?

YES

Is not an indoor unit of different

refrigerant line connected?

YES

Correct piping.

YES

Check mispiping of discharge gas/

suction gas main pipes.

Does not discharge refrigerant gas by

pass to suction sidethrough 4-way valve?

Replace defective parts.

Repair the flow selector unit.

Correct installation of valve coil.

Replace SV42 valve.

Check with miscabling check function of outdoor unit.

( )

Check leakage of SV5 circuit.

Check clogging of SV6 circuit.

Is the flow selector unit normal?

[P15]

Are service valves of gas

and liquid sides fully opened?

YES

Is outdoor PMV1, 2 normal?

1. Connector connection

2. Cabling

3. Coil

4. V alve body

5. Outdoor I/F P.C. board

Are characteristics of

TD1, TD2 sensor resistance normal?

Is SV4 valve circuit normal?

(Coil misinstallation, valve leakage)

Are not indoor units in different

refrigerant circuit connected?

Check leakage of

SV5 and SV11 circuits.

Check mispiping of discharge gas/

suction gas main pipes.

Is the flow selector unit normal?

Refrigerant shortage,

clogging, pipe breakage.

YES

Normal

Check code name

Gas leak detection

TD condition (Auxiliary code : 02)

Connectors CN300, 301 White

Refer to outdoor unit temperature sensor characteristics-4.

Check with miscabling check

( )

function of outdoor unit.

Abnormal

(Check there is no clogging and pipe breakage, and then recharge refrigerant.)

1. Outdoor unit service valve closed

2. Outdoor PMV error

3. TD sensor error

4. SV4 circuit error

5. Refr igerant shortage, clogging refrigerant circuit

Cause of operation

Open service valves fully.

Repair outdoor PMV.

Replace TD1 or TD2 sensor.

Repair SV41 and SV42 circuits. Coil, valve body, coil installation,

( )

disconnection of cable, etc.

Replace defective parts.

Repair the flow selector unit.

Correct cabling.

Correct piping.

Check code name

[P17]

Check code name

Discharge temp TD2 error

Cause of operation

1. Outdoor unit service valve closed

2. Outdoor PMV error

3. TD sensor error

4. Refr igerant shortage, clogging of refrigerant circuit

5. 4-way valve error

6. SV4 circuit leakage, misinstallation

7. SV5 circuit leakage

8. SV6 circuit clogging

9. Mispiping of discharge gas/suction gas pipes

10. Flow selector unit error

Page 86

Check code name

Reset power supply, and start a test operation corresponded to the season.

Open service valves fully.

Check parts.

Failure

Replace

1. Pressure by pressure gauge (Check joint)

2. Pressure display on 7-segment display

3. Output voltage of I/F P.C. board If 1 and 2, 3 are different, an error of pressure sensor is considered. If 2 and 3 are different, check I/F P.C. board.

Is there a cause to interfere operation

of heat exchanger of outdoor unit?

1. Heat exchanger clogging

2. Air short circuit

Refrigerant overcharge, clogging,

pipe breakage, abnormal overload condition

(Connector connection, fan IPDU, fan motor, wiring)

YES

Normal

YES

Correct piping.

Correct faulty parts.

(Connector connection wiring, coil mounting, valve clogging, etc)

Correct faulty position.

(Coil error, clogging, disconnection of cable, etc.)

Repair SV2 circuit.

(Coil error, clogging, disconnection of cable, etc.)

Repair SV4 circuit.

Repair check valve.

Replace

Abnormal

Replace defective parts.

Abnormal

Repair the flow selector unit.

Eliminate the interfered causes.

Abnormal

All cooling operation

To B

All heating operation To C

Is SV2 circuit normal?

Is SV4 circuit normal?

Is outdoor PMV1, 2 normal?

Is there no fan crack or coming-off?

B All cooling operation

Are service valves fully opened?

Check operation of PMV3 SV12.

Is the flow selector unit normal?

Does check valve of main

discharge pipe normally operate?

Does cooling outdoor fan normally operate?

Are characteristics of

high-pressure sensor normal?

Check mispiping of discharge gas/

suction gas main pipes.

[P19]

Check code name

4-way valve operation error

Auxiliary code : Detected outdoor unit No.

Is 4-way valve coil

connector connected?

YES

Are TS1, TE1, Pd, Ps sensor

connectors connected?

YES

Cause of operation

1. 4-way valve error

2. TS1 sensor/TE1 sensor error

3. Pd sensor/Ps sensor error

4. TE sensor/TL sensor misconnection

Correct connector connection.

(4-way valve coil: CN317)

Correct connector connection.

TS1 sensor: CN504 TE1 sensor: CN505

Pd sensor: CN501 Ps sensor: CN500

Check code name

[P20]

Check code name

High-pressure protective operation

Cause of operation

1. Pd sensor error

2. Service valve closed.

3. Indoor/outdoor fan error

4. Indoor/outdoor PMV clogging

5. Indoor/outdoor heat exchanger clogging

6. SV2 circuit error

7. SV4 circuit error

8. SV5 circuit error

9. Outdoor I/F P.C. board error

10. Operation error of check valve of main discharge pipe

11. Refrigerant overcharge

Are characteristics of resistance value

of TS1 and TE1 sensors normal?

Are output voltage characteristics

of Pd and Ps sensors normal?

Are connection and installation

of TE1 and TL sensors correct?

Reset the power supply and

start heating test operation.

Is the flow selector unit normal?

Does 4-way valve operate?

4-way valve error

YES

YES NO

1Check TS and TE temperature of the outdoor unit which compressors is operated.

(I/F) SW01=[1], SW02=[6], SW03=[2] ® TS sensor temperature

SW01=[1], SW02=[7], SW03=[2] ® TE sensor temperature

TE sensor: Normal if TE ≤ 20˚C except summer season (Outside temp 20˚C or lower) TS sensor: Normal if TS ≤ 40˚C except summer season (Outside temp 20˚C or lower)

Does not discharge

refrigerant gas bypass to

suction side through

4-way valve? *1

YES

Check 4-way valve.

Replace sensor.

Correct connection

and installation.

Replace the FS unit.

If an error did not occur in test operation, restart the operation.

Page 87

Is not outdoor fan motor locked?

Is sub-code of outdoor I/F P.C. board [0d]?

Check fan IPDU.

Correct cable connector connection.

Correct cause of overload.

Retightening of screws, etc.

Replace fan IPDU.

Is there no problem

such as stuffing or blast blowing to

discharge port of outdoor fan?

Are wire connector

connection on fan IPDU and

power P.C. board A’ssy normal?

Is there no loosening on fixation

between fan IPDU and heat sink?

Replace motor.

YES

Is winding resistance of the motor correct?

13 to 33 (Between R and S, R and T, S and T)

YES

All heating operation

Does heating indoor fan

normally operate?

YES

Is indoor PMV normal?

YES

Is connector connection

coil normal?

YES

Is there a clogging?

YES

heat exchanger fan or

of sensor TC2 and TCJ

Check indoor P.C. board.

Is connector

connection of indoor

fan motor normal?

YES

Are characteristics

resistance normal?

YES

Replace

Faulty

Repair faulty parts.

Replace TC2 or TCJ sensor.Repair faulty parts.

Check code name

[P22]

Auxiliary code: 0 ∗ : IGBT short circuit 1 ∗ : Position detect circuit error

3∗ : Motor lock error 4 ∗ : Motor current error detected C∗ : TH sensor error (Heat sink overheat) D∗ : TH sensor error E∗ : Vdc error

Check code name

Outdoor fan IPDU error

Cause of operation

1. Fan lock

2. Fan IPDU P.C. board error

3. Overload cause

4. Exter nal cause such as blast

5. Fan IPDU power P.C. board error

Is check valve of main

discharge pipe normal?

YES

Is there a cause to

interfere operation of

heat exchanger of indoor unit?

1. Air filter clogging

2. Heat exchanger clogging

3. Air short circuit NO

Is SV5 circuit normal?

YES

Check operation of 4-way valve.

Normal

Check clogging of SV11 circuit.

Normal

Are not indoor units of different

refrigerant circuit connected?

YES

Refrigerant overcharge,

clogging, pipe breakage,

abnormal overload condition

Replace PMV body

YES

Abnormal

Check with miscabling check function

( )

of outdoor unit.

Repair check valve.

Repair check valve. Replace

Eliminate the interfered causes.

Repair SV5 circuit.

Coil error, choke,

( )

disconnection of cable, etc.

Replace 4-way valve.

Replace defective parts.

Check and correct cabling.

Replace

Page 88

Check code name

Is not grounded?

Is not winding opened?

Are connector connection

and wiring normal?

Is not winding shorted?

(Is winding resistance 0.1 to 0.3 ?)

Check IPDU P.C. board.

Failure

Replace

Compressor error

Replace

Compressor error

Replace

Compressor error

Replace

Check and correct circuit and cables

such as cabling to compressor, etc.

YES

[P26]

Check code name

G-T r short-circuit protection error

Cause of operation

1. Outdoor unit power error

2. IPDU error/Cable connection error

3. Compressor error

4. IPDU P.C. board error

Check code name

[P29]

Check code name

Compressor position

detective circuit error

Cause of operation

1) Cable/connector connection error

2) Compressor error

3) IPDU P.C. board error

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Is power voltage of outdoor unit normal?

YES

Is wire connector connection

on IPDU P.C. board normal?

YES

Is compressor normal?

YES

Is smoothing condenser normal?

(1500µF, 350V)

YES

Replace IPDU P.C. board.

Correct power line.

Correct connection

of wire connector.

Replace compressor.

Check capacity coming-out/

external appearance.

Auxiliary code : 01: Compressor 1 side 02: Compressor 2 side

Check code name

[P31]

When the header unit of the group detected [E03, L03, L07, L08 error], the follower unit of the group displays [P31] error and stops. There are no check code display and alarm record of the main remote controller.

Check code name

Other indoor error

(Group follower unit error)

Cause of operation

Other indoor unit in the group is abnormal.

Page 89

7-6. 7-Segment Display Function

n 7-segment display on the outdoor unit (Interface P.C. board)

On the interface control P.C. board, 7-segment LED to check the operating status is provided on the control P.C. board.

The displayed contents are changed by combining the setup numbers of the rotary switches (SW01, SW02, and SW03) on P.C. board.

Interface P.C. board

SW08SW06

SW07 SW09

7-segment

display A

2nd.

place

1st.

place

3rd.

place

7-segment

display B

2nd.

place

1st.

place

CN30

CN31

SW08SW06

SW07 SW09

CN30

CN31

SW05 SW15

CN32

SW04

D602 D603 D604D600

D601

Display A

Display B

SW02 SW03

SW01

Display A

SW01

CN32

D601

SW02 SW03

D602 D603 D604D600

SW05 SW15

SW04

u Check procedure in case of stop with trouble

When the system stopped due to a trouble of the outdoor unit, execute a check in the following procedure.

1. Open the panel of the outdoor unit, and then check the 7-segment display. The check code is displayed at the right side of 7-segment display B. [U1] [¡¡¡] ([¡¡¡]: Check code) ∗ Switch setup when confirming the check code: SW01 [1], SW02 [1], SW03 [1]

However the check code [¡¡¡] is displayed for 3 seconds and the auxiliary code [¡¡¡] for 1 second are alternately displayed if an auxiliary code is provided.

2. Confirm the check code, and then conduct the check operation based on the procedure of each check code diagnosis.

3. [U1] [E28] on 7-segment display means a trouble on the follower unit. Push the push-switch SW04 on the header unit for several seconds. (2 seconds or more) As only the fan of the outdoor unit with a trouble driv es, open the panel of the corresponding unit, and

then confirm the check code displayed with 7-segment.

4. Perform the check operation based on the procedure of each check code diagnosis.

Display B

How to read the check monitor

<7-segment display>

5n6o7r8S9tAVbyC–duEFHJLP

a0c1e2G3h4i

Page 90

1. Data display of system information (Displayed on the header outdoor unit only)

SW011SW02

SW03

Refrigerant name Displays refr igerant name. A B

Model with refrigerant R410A r4 10A Model with refrigerant R407C r4 07C

System capacity A [ 5] to [48] : 5 to 48HP

B [HP]

No. of outdoor units A [ 1] to [ 4] : 1 to 4 units

B[ P]

No. of connected indoor units/ A [ 0] to [48] : 0 to 48 units (No. of connected units) No. of units with cooling thermo ON

No. of connected indoor units/ A [ 0] to [48] : 0 to 48 units (No. of connected units) No. of units with heating thermo ON

Compressor command A Data is displayed with hexadecimal notation correction amount

Release control A Normal time : [ r], During release control: [r1]

Oil-equalization control A Normal time : [oiL-0]

Oil-equalization request A Displays with segment LED lighting pattern

B [C0] to [C48] : 0 to 48 units (No. of units with cooling thermo ON)

B [H0] to [H48] : 0 to 48 units (No. of units with heating thermo ON)

B —

B During oil equation : [oiL-1]

Display contents

Display A Display B

U2 U3 U4

F in the left figure goes on: Header requests oil equalization.

C in the left figure goes on: Follower requests oil-equalization.

(Outdoor unit number)

14 15 16

Refrigerant/oil recovery operation A During sending of cooling refrigerant oil recovery signal : [C1].

Automatic address A [Ad]

Demand operation A [dU]

Optional control (P.C. board input) Displays optioned control status A B

Option control (BUS line input) Same as above Unused — A —

Normal time : [C ]

B During sending of heating refrigerant oil recovery signal : [H1].

Normal time : [H ]

B Automatic addressing : [FF], Normal time : [ ]

B Normal time : [ ]. In 50% to 90% : [ 50 to 90]

When controlling by communication line input : [E50 to E90]

Operation mode selection : In heating with priority (Normal) h.∗∗.∗.∗.

Priority on cooling c.∗∗.∗.∗. Heating only H.∗∗.∗.∗. Cooling only C.∗∗.∗.∗. Priority on No. of operating indoor units n. ∗∗.∗.∗. Priority on specific indoor unit U.∗∗.∗.∗.

Batch start/stop : Normal ∗.…. ∗.∗.∗.

Start input ∗.1. ∗.∗.∗. Stop input ∗.0. ∗.∗.∗.

Night low-noise operation : Normal ∗.∗.….∗.∗.

Operation input ∗.∗.1.∗.∗.

Snow fan operation : Normal ∗.∗. ∗.….∗.

Operation input ∗.∗. ∗.1.∗.

B —

∗ mark: Indicates none on display

Page 91

2. Data display of outdoor unit information (Displayed on each outdoor unit)

SW01

SW02

SW03

Error data A Displays outdoor unit number: [U1] to [U4]

B Displays check code (Latest code only is displayed.)

<SW04> push function : Fan of unit with error only drives. 7-segment A: [E1] <SW04 + SW05> push function : Fan of normal unit only dr ives. 7-segment A: [E0] <SW05> push function : Interr uption of fan operation function

14 15 16

— A —

B —

Operation mode A Stop: [ ]

B —

Outdoor unit HP A 5HP: [ 5], 6HP: [ 6], 8HP: [ 8], 10HP: [10], 12HP: [12]

B [HP]

Compressor operation command A No.1 compressor operation command is displayed.

B No.2 compressor operation command is displayed.

<SW04> push function : Inverter frequency is exchanged to decimal notation. 7-segment display (A/B) : [∗ ∗ ] [∗ ∗ H] (Normal display by pushing <SW05>)

Outdoor fan step A [FP]

B Step 0 to 31: [ 0 to 31]

Compressor backup A Displays No.1 compressor setup status

B Displays No.2 compressor setup status

— A —

B —

Control valve output data Displays control output status of solenoid valve A B

4-way valve: ON H. 1 4-way valve: OFF H. 0 SV2: ON / SV5: OFF 2. 1 SV2: OFF / SV5: ON 2. 0 SV3A: ON / SV3B: OFF / SV3C: OFF /SV3D: OFF 3. 1 0 0 0 SV3A: OFF / SV3B: ON / SV3C: OFF /SV3D: OFF 3. 0 1 0 0 SV3A: OFF / SV3B: OFF / SV3C: ON /SV3D: OFF 3. 0 0 1 0 SV3A: OFF / SV3B: OFF / SV3C: OFF /SV3D: ON 3. 0 0 0 1 SV41: ON / SV42: OFF 4. SV41: OFF / SV42: ON 4.

PMV1 /PMV2 opening Displays opening data (Decimal) (Total opening) ∗ ∗∗ ∗. P — — Oil level judgment status A [oL]

B Initial display: [

Display contents

There is no check code: [– – –] There is auxiliary code: Check code [∗ ∗ ∗] for 3 seconds,

auxiliary code [– ∗ ∗] for 1 second alternately

Normal cooling: [ C], Normal heating: [ H], Normal defrost: [ J]

Data display with Hexadecimal notation: [00 to FF]

Normal: [ ], Backup setup: [C1]

Normal: [ ], Backup setup: [C2]

— —

<SW05> push SW function: The following data is displayed for 2 seconds. * Dur ing oil shortage in compressor 1: [L …],

during oil shortage in compressor 2: [… L]

… … …

Judgment result of compressor 1 in [#], compressor 2 in [∗] (0: Normal, 1, 2: Shortage) is displayed.

], Oil level judgment result: [A. #. ∗]

… … … … … …

…

5. 0

…

5. 1

…

… … …… … … … …… … …

…

∗∗ ∗. P

1 0

0 1

…

Page 92

3. Data display of outdoor cycle (Displayed on each outdoor unit)

SW011SW02

2 3 4

SW03

Pd pressure data Pd pressure (MPaG) is displayed with decimal data.

Ps pressure data Ps pressure (MPaG) is displayed with decimal data. PL pressure conversion data TD1 sensor data Temperature sensor data (°C) is displayed

TD2 sensor data

TS1 sensor data

TS2 sensor data

TE sensor data

TL sensor data

TO sensor data

TK1 sensor data

TK2 sensor data

TK3 sensor data

TK4 sensor data

— A —

(MPaG: Approx. 1/10 value of kg/cm2G data)

Estimated pressure of liquid line (MPaG) is display ed with decimal data.

with decimal notation.

• Symbol display for 1 sec. and data display for 3 sec. are alternately displayed.

• Data is displayed in [∗].

• Negative data is displayed as [– ∗ ∗ ∗ ∗].

B —

Display contents

AB P d. ∗. ∗ ∗ P S. ∗. ∗ ∗ P L. ∗. ∗ ∗

Symbol t d 1 1 1

Data ∗∗ ∗. ∗

Symbol t d 2 1 1

Data ∗∗ ∗. ∗

Symbol t S 1 1 1

Data ∗∗ ∗. ∗

Symbol tS 2 1 1

Data ∗∗ ∗. ∗

Symbol tE —

Data ——

Symbol t L

Data ∗∗ ∗. ∗

Symbol t o

Data ∗∗ ∗. ∗

Symbol F 1

Data ∗∗ ∗. ∗

Symbol F 2

Data ∗∗ ∗. ∗

Symbol F 3

Data ∗∗ ∗. ∗

Symbol F 4

Data ∗∗ ∗. ∗

4. Data display of indoor unit information (Displayed on the header unit only)

SW01

SW02

SW03

1 to 16

1 to 3

Receiving status of B Receiving time: [… … 1], Not received: [… … …]

indoor BUS communication 5 6

8 9

10 11 12 13

Indoor check code B No check code: [– – –]

Indoor capacity B 0. 2, 0. 5, 0. 8, … 1, 1. 2, 1. 7, … 2, 2. 5, … 3, 3. 2, … 4, … 5,

(HP) horse power

Indoor request command B Data is displayed with Hexadecimal notation [… … 0 to … … F] : Heating

(S code)

Indoor PMV opening data B Data is displayed with Hexadecimal notation

Indoor TA sensor data B Data is displayed with Hexadecimal notation

Indoor TF sensor data B Data is displayed with Hexadecimal notation

Indoor TCJ sensor data B Data is displayed with Hexadecimal notation

Indoor TC1 sensor data B Data is displayed with Hexadecimal notation

Indoor TC2 sensor data B Data is displayed with Hexadecimal notation

…

6, … 8, 1 0, 1 6, 2 0

NOTE) Indoor address No. is chosen by changing SW02 and SW03.

SW03

SW02

1 to 16

Indoor address

SW02 setup number SW02 setup number + 16 SW02 setup number + 32

7-segment display A

[01] to [16] [17] to [32] [33] to [48]

Display contents

Page 93

5. Outdoor EEPROM write-in error code display (Displayed on the header unit only)

∗ The latest error code written in EEPROM of each outdoor unit is displayed.

(It is used when confirming the error code after power supply has been reset.)

Set SW01 to 03 as shown in the following table, and the push SW04 for 5 seconds or more to display an error code.

W011SW02

SW03

16 2 3

n 7-segment display A, B

Display contents

The latest error code of the header unit 1 (U1) The latest error code of the follower unit 1 (U2) The latest error code of the follower unit 2 (U3)

Display A

Display B

D600 D601 D602 D603 D604

7-segment display

AB E. r 1. – – E. r 2. – – E. r 3. – –

7-7. Sensor Characteristics

Indoor Unit

n Temperature sensor characteristics

Resistance [k ]

Characteristic-1

Indoor T A sensor

10 20 30 40 50

Temperature [˚C]

Resistance [k ] (10˚C or lower)

200

150

100

-20-30 -10 0 10 20 30 40 50 60 70 80 90 100

Characteristic-2

Indoor TC1, TC2, TCJ sensors

Temperature [˚C]

]

Resistance [k

(10˚C or higher)

Page 94

Indoor unit

Network adaptor (Option)

Network adaptor P.C. board (MCC-1401)

DC5V

Power circuit Switch setup

Transformer

None for Concealed

Remote

controller

communication

circuit

CPU

H8/3687

PMV

Louver

motor

Duct type

Drain pump

Indoor

fan

motor

Indoor control P.C. board (MCC-1402)

DC5V DC12V

Driver

CPU

TMP88CH

47FG

(TMP88PH47FG)

Outside output

Start

Alarm

Ready

Thermostat ON

COOL

HEAT

FAN

DC 280V

Power

circuit

Fan motor

control circuit

Wired remote controller (Up to 2 units) Weekly timer

Display

LCD

Display

LED

communication circuit

CPU

Remote controller

CPU

H8/3039

synchronous

signal input

circuit

Function setup

Key switch

DC5V

Power circuit

EEPROM TA sensor

TCI sensor TC2 sensor TCJ sensor

Float input

BUS

communication

circuit

CN2 CN1

Same as left

Power supply

U1 U2

Outdoor

unit

Display

LCD

Power circuit

#3 A B#2 A B

Power

supply

DC5V

Same

as left

U1 U2

Outdoor

Secondary

unit

LCD

driver

CPU

battery

Function setup

Key switch

Max. 8 units are connectable. *1 *1 However in a case that the

network adaptor is installed when 2 remote controllers are connected, maximum 7 units are connectable.

*2 The network adaptor is

installed to only one unit.

*3 The weekly timer cannot be

connected to the simple wired remote controller.

*4 Nome for high wall spearate

sold parts for under ceiling.

1. Connection of wired remote controller

Compact 4-way Air Discharge Cassette Type

8. CONFIGURATION OF CONTROL CIRCUIT

8-1. Indoor Unit

8-1-1. Indoor Controller Block Diagram

NU1U2

Power supply

1Ø220-240V, 50Hz

1Ø220V, 60Hz

U1 U2

Outdoor unit

Indoor/Outdoor communication

Page 95

Indoor unit #1

Network adaptor (Option)

Network adaptor P.C. board (MCC-1401)

DC5V

Power

circuit

Transformer

communication

None for Concealed Duct type

Remote

controller

circuit

CPU

H8/3687

Switch

setup

PMV

Louver

motor

Drain

pump

Indoor

fan motor

Indoor control P.C. board (MCC-1402)

DC5V

DC12V

CPU

TMP88CH

47FG

(TMP88PH47FG)

DC280V

Power circuit

Fan motor

control circuit

Alarm

Ready

Thermostat ON

COOL

HEAT

communication circuit

Driver

Outside output

Start

FAN

Remote controller

CPU

H8/3039

synchronous

signal input

circuit

EEPROM

TA sensor

TCI sensor TC2 sensor TCJ sensor

Float input

None for Concealed Duct

BUS

communication

circuit

Power

circuit

Buzzer

Wireless remote controller kit

Sensor P.C. board

Remote controller

communication circuit

CPU

Sensor

circuit

Display

LED

Emergent operation

Function

setup

#2 A B

Same as left

U1 U2

Power

supply

Outdoor

unit

#3 A B

Same

as left

U1 U2

Power supply

Outdoor

unit

Compact 4-way Air Discharge Cassette Type

2. Connection of wireless remote controller kit

NU1U2

Power supply

1Ø220-240V, 50Hz

1Ø220V, 60Hz

U1 U2

Outdoor unit

Indoor/Outdoor communication

Max. 8 units are connectable. *1 *1 However in a case that the network adaptor is installed

when 2 wireless remote controller kits are connected,

maximum 7 units are connectable. *2 The network adaptor is installed to only *3 Nome for high wall spearatesold parts for under ceiling.

One unit.

Page 96

Indoor unit

Network adaptor (Option)

Network adaptor P.C. board (MCC-1401)

DC5V

Transformer

PMV

Drain pump

Remote

controller

communication

circuit

CPU

H8/3687

Switch setupPower circuit

Louver

motor

None for Concealed Duct type

Indoor

fan motor

Indoor control P.C. board (MCC-1402)

DC5V

DC12V

CPU

TMP88CH

47FG

(TMP88PH47FG)

Fan motor

DC 280V

Power

circuit

control circuit

Thermostat ON

Wired remote controller Weekly timer

Power

circuit

Buzzer

Display

LCD

DC5V

Power

circuit

communication

DC5V

Sensor

circuit

Driver

Start Alarm Ready

COOL HEAT

FAN

Display

LCD

Display

LED

Outside output

CPU

Remote

controller

communication

circuit

Remote

controller

communication

circuit

CPU

H8/3039

synchronous

signal input

circuit

Function setup

Key switch

DC5V

Power circuit

EEPROM TA sensor

TCI sensor TC2 sensor TCJ sensor

Float input

None for Concealed Duct

BUS

communication

circuit

CN2 CN1

LCD

driver

CPU

Secondary

battery

Remote

controller

circuit

CPU

Display

Function setup

Key switch

Wireless remote controller kit

Sensor P.C. board

Emergent operation

Function

LED

setup

#2 A B

Same as left

U1 U2

Power supply

Outdoor

unit

#3 A B

Same

as left

U1 U2

Power supply

Outdoor

unit

Compact 4-way Air Discharge Cassette Type

3. Connection of both remote controller and wireless remote controller kit

Max. 8 units are connectable. *1 *1 However in a case that the network adaptor is installed, maximum 7 units are connectable. *2 The network adaptor is installed to only one unit. *3 The weekly timer cannot be connected to the simple wired remote controller. *4 Nome for high wall spearate sold parts for under ceiling.

Outdoor unit

Power supply

1Ø220-240V, 50Hz

1Ø220V, 60Hz

U1 U2 U1 U2

Indoor/Outdoor communication

Page 97

8-1-2. Indoor Print Circuit Board

MCC-1402

Compact 4-way Air Discharge Cassette Type

DC fan output

PMV output

DC fan return

Float SW

Microcomputer operation LED

Filter/Option error input

EEPROM

Power supply

Optional power supply

Remote controller power supply LED

Drain pump output

Fan output

Optional output

Flap (Used only for 4-way Air Discharge Cassette Type,Under ceiling type)

HA (T10)

TA sensor

DISP

CHK

TCJ sensor

EXCT

Used for servicing

TC1 sensor

TC2 sensor

Remote controller inter-unit cable

Indoor/Outdoor communication (Also used for communication of the

*1 Indoor/Outdoor communication (Spare)

central control system)

*1 : Used only for under-ceiling, high wall

Page 98

8-1-3. Optional Connector Specifications of Indoor P.C. Board

Function

Humidifier output

Fan output

—

Option output

Connector

No.

CN66

CN32

CN61

CN60

Pin No.





























Specifications

DC12V Output DC12V

Output

ON/OFF input

0V (COM) Main prohibition input

Operation output DC12V (COM) Alarm output DC12V (COM) Defrost output Thermo ON output COOL output

Remarks

In heating, thermo ON, Fan ON, Humidifier output ON * Humidifier provided, Drain pump ON is set up by CN70

short-circuit or from remote controller. (DN=40)

Shipment setup: ON with indoor unit operation and OFF with stop are linked.

* Single operation by FAN button on remote controller is set

up from remote controller (DN=31)

HA ON/OFF input (J01: YES/NO=Pulse (At shipment) / Static input select)

Operation stop of main remote controller is permitted / prohibited by input.

ON during operation (Answerback of HA)

ON during alarm output

ON when outdoor unit is defrosted ON during Real thermostat ON (Compressor ON) ON when operation mode is cooling system

(COOL, DRY, Cool/Heat Auto cooling)

Outside error input

— —

CHK operation check

DISP exhibition mode

EXCT demand

CN80

CN20 CN70 CN71

CN72

CN73

HEAT output



Fan output



DC12V (COM)



DC12V (COM)



Outside error input



— —

Check mode input





Display mode input





Demand input





— —

ON when operation mode is heating system (HEAT, Cool/Heat Auto cooling)

ON when indoor fan is ON (During use of air cleaner/Interlock cabling)

Generate check code “L30” (for 1 minute continuously) to stop forcedly the operation.

— —

Used for indoor operation check. (Outdoor does not communicate with remote controller, and outputs specified operation such as indoor fan “H”, drain pump ON, etc.)

Exhibition mode enables to communicate by indoor unit and remote controller only. (When power has been turned on.) Timer short (Usual)

Indoor unit forced thermostat OFF operation

Page 99

9. DETA CHMENTS

9-1. Indoor Unit

MMU-AP0071MH, AP0091MH, AP0121MH, AP0151MH, AP0181MH Ceiling panel: RBC-UM11PG-E

Preparing work:

1. Before work, be sure to stop the power supply of the air conditioner and turn off switch of the power supply breaker. (Otherwise an electric shock may be caused.)

2. Be sure to put on the gloves when working; otherwise an injury may be caused with parts sharp edges etc.

No.1Part name

Suction grille

Procedure

1. Detachment

1) Slide hooks (2 positions) of the suction grille to inner side, and then hang down the suction grille.

2) Take off the strap that connects the panel and the suction grille, and then lift up shaft of the suction grille to remove the suction grille.

Hook of suction grille

Hook of fall-preventive strap

2. Attachment

1) Hook shaft of the suction grille to the panel.

2) Hook strap of the suction grille to the original position of the panel.

3) Close the suction grille and slide the hooks outward to fix it.

Remarks

Ceiling panelSuction grille

Hook hole of ceiling panel

Electric parts cover

1. Detachment

1) Perform work of procedure 1 -1.

2) Take off screws (Ø4 × 10, 3 pcs.) fixing the electric parts cover.

3) Remove the electric parts cover from the temporary hanging hook of the electric par ts cover, and then open the cover.

2. Attachment

1) Close the electric parts cover and hook the cover hole to the temporary hanging hook.

2) Tighten the fixing screws. (Ø4 × 10, 3 pcs.)

Screws

Unnecessary to remove this hook.

Temporary hanging hoo

Screw

Page 100

No.3Part name

Procedure

Remarks

Adjust corner cover

1. Detachment

1) Perfor m wor k of procedure of 1 -1.

2) Turn clockwise screws (4 positions) at the suction port cor ner until adjust corner cover rises up.

NOTE)

When you work, keep the torque at below 12N•m. Do not use an electric screwdriver; otherwise the mechanism of adjust corner cover may be damaged and not be removed.

3) Pull downward the risen-up part of adjust corner cover and remove it.

4) Remove the strap of adjust corner cover.

2. Attachment

1) Attach the strap of adjust corner cover to the panel, hook claws of adjust corner cover to the panel corner, and then push the opposite side into the panel.

2) Turn screws (4 positions) of the suction port cor ner counterclockwise until bump between adjust corner cover and panel disappears.

NOTE)

When you work, keep the torque at below 12N•m. Do not use an electric screwdriver; otherwise the mechanism of adjust corner cover may be damaged and not be removed.

Torque~12N·m

Ceiling panel

1. Detachment

1) Perfor m wor ks of procedure 1 -1-, 2 -1,

2) Remove the flap connector (CN33, White,

-1.

and

5P) connected to the control P.C. board and then take off the lead wire from the clamp.

NOTE)

Remove the connectors after unlocking the lock of the housing.

3) Take off screws (M5, 4 pcs.) fixing the ceiling panel.

4) Push the temporary bracket to inner side to remove the ceiling panel.

2. Attachment

1) Hook the panel to the temporary bracket of the drain pan of the main body.

NOTE)

The panel has directionality. Therefore mount the panel according to the temporary bracket and the bracket mounting position.

2) Tighten the fixing screws. (M5, 4 pcs.)

3) Connect flap connector of the ceiling panel to the connector (CN33, White, 5P) of the control P.C. board.

Cable clamp

Hanging section of tentative hook of ceiling panel

Push to remove

Ceiling panel

Washer based screw

Temporary bracket

Drain piping corner

Temporary bracket

Hanging section of temporary bracket

CN33

100

Toshiba MMU-AP0121MH, MMU-AP0071MH, MMU-AP0181MH, MMU-AP0091MH, MMU-AP0151MH User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual