Toshiba MML-AP0074H2UL, MML-AP0094H2UL, MML-AP0124H2UL, MML-AP0154H2UL, MML-AP0184H2UL Service Manual

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PRINTED IN JAPAN, Mar., 2016, TOMO

FILE No. A10-1602 Revision 1 : Jun., 2016 Revision 2 : Jun., 2017

SERVICE MANUAL

AIR-CONDITIONER

(MULTI TYPE)

MML-AP0074H2UL MML-AP0094H2UL MML-AP0124H2UL MML-AP0154H2UL MML-AP0184H2UL MML-AP0244H2UL

MML-AP0074BH2UL MML-AP0094BH2UL MML-AP0124BH2UL MML-AP0154BH2UL MML-AP0184BH2UL MML-AP0244BH2UL

– 2 –

CONTENTS

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

1. SPECIFICATIONS ..............................................................8

2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)...............10

3. WIRING DIAGRAM ...........................................................16

4. PARTS RATING ................................................................18

5. REFRIGERATING CYCLE DIAGRAM ..............................19

6. CONTROL OUTLINE........................................................20

7. APPLIED CONTROL AND FUNCTION ............................26

8. TROUBLESHOOTING ......................................................47

9. DETACHMENTS ...............................................................69

10. P.C. BOARD EXCHANGE PROCEDURES .....................81

11. EXPLODED VIEWS AND PARTS LIST...........................87

– 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 and understand the described items thoroughly in the following contents (Indications/Illustrated marks), and keep the manual for reference. The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual.

[Explanation of indications]

∗ Property damage : Enlarged damage concerned with property, furniture, and domestic animal/pet

[Explanation of illustrated marks]

[Confirmation of warning label on the main unit]

Confirm that labels are indicated on the specified positions (Refer to the Parts disassembly diagram (Outdoor unit).) If removing the label when parts are being replaced, stick it back on the original location.

Indication

DANGER

WARNING

CAUTION

Explanation

Indicates that an imminent danger causing a death or serious injury of the repair engineers and the third parties may occur when an incorrect work has been executed.

Indicates possibilities of a danger causing death or serious injury of the repair engineers, the third parties, and the users due to problems from the product after installation when an incorrect work has been executed.

Indicates that an injury or property damage (∗) may be caused to the repair engineers, the third parties involved, and the users due to troubles of the product after installation when an incorrect work has been executed.

Mark Explanation

Indicates prohibited items (Forbidden to do) The sentences near an illustrated mark describe the concrete prohibited contents.

Indicates mandatory items (Compulsory to do) The sentences near an illustrated mark describe the concrete mandatory contents.

Indicates cautions (Including danger/warning) The sentences or illustration near or in an illustrated mark describe the concrete cautious contents.

Turn off breaker.

Execute discharge

between terminals.

Prohibition

Turn “OFF” the breaker before removing the front panel and cabinet, otherwise an electric shock is caused by high voltage which may result in death or injury.

During operation, a high voltage with 400V or higher of circuit (∗) at secondary circuit of the high-voltage transformer is applied.

If touching a high voltage with the naked hands or body, an electric shock is caused even if using an electric insulator.

∗ : For details, refer to the electric wiring diagram.

When removing the front panel or cabinet, execute short-circuit and discharge between high-voltage capacitor terminals.

If discharge is not executed, an electric shock is caused by high voltage which could result in death or injury. After turning off the breaker, high voltage is kept on the high-voltage capacitor.

Do not turn on the breaker under condition that the front panel and cabinet are removed.

An electric shock is caused by high voltage which could result in death or injury.

DANGER

– 4 –

Check ground wires.

Prohibition of modification.

Use specified parts.

Do not bring a child

close to the equipment.

Insulating measures

No fire

Refrigerant

Assembly/Cabling

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

If the ground wire is not correctly connected, contact an electrician 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 wires with crimp contact, etc, put the closed end side upward and then apply a water-cut method, otherwise a leak or fire is caused at the users’ side.

When repairing the refrigeration 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.

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.

Do not use any refrigerant different from the one specified for complement or replacement.

Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion of the product or an injury to your body.

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 refrigeration cycle and an injury due to breakage may be caused.

Do not charge additional refrigerant.

If charging additional refrigerant when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes results 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 refrigerant 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 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.

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

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

WARNING

– 5 –

After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 2MΩ or more between the charge section and the non-charge metal section (Ground 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 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 with the power-ON, use rubber gloves and do not touch the charging section.

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

When you access inside of the service panel to repair electric parts, wait for about five minutes after turning off the breaker. Do not start repairing immediately.

Otherwise you may get electric shock by touching terminals of high-voltage capacitors. Natural discharge of the capacitor takes about five minutes.

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

If the leaked position cannot be found 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 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 on the refrigerating cycle, water leak, electric shock or fire is caused.

After repair work has been 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 ground 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.

Insulator check

Ventilation

Be attentive to

electric shock

Compulsion

Check after repair

Check after reinstallation

WARNING

CAUTION

Put on gloves

Cooling check

Be sure to put on the gloves (∗) and a long sleeved shirt: otherwise an injury may be caused with the parts, etc.

(∗) Heavy gloves such as work gloves

When the power is 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.

– 6 –

• Refrigerant (R410A)

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

1. Safety Caution Concerned to Refrigerant (R410A)

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

2. Cautions on Installation/Service

1) Do not mix other refrigerant or refrigerating oil. For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of the previous refrigerant in order to prevent mixture of them.

2) As the use pressure of the refrigerant (R410A) 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 clean pipes. Be sure to braze with flowing nitrogen gas. (Never use any other gas except for nitrogen.)

4) For the ground 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 conditioner 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 is minimal.

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 0.0001 lbs / 32’ 10” (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.

– 7 –

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

(Note) 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.

General tools (Conventional tools can be used.)

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

1) Vacuum pump. Use vacuum pump by attaching vacuum pump adapter. 7) Screwdriver (+, –)

2) Torque wrench 8) Spanner or Monkey wrench

3) Pipe cutter 9) Hole core drill

4) Reamer 10) Hexagon wrench (Opposite side 4mm)

5) Pipe bender 11) Tape measure

6) Level vial 12) Metal saw

Also prepare the following equipments for other installation method and run check.

1) Clamp meter 3) Insulation resistance tester (Megger)

2) Thermometer 4) Electroscope

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

Usage

Pipe flaring

Flaring by conventional flare tool

Tightening of flare nut

Evacuating, refrigerant charge, run check, etc.

Vacuum evacuating

Refrigerant charge

Gas leakage check

R410A

air conditioner installation

Existence of Whether conven-

new equipment tional equipment

for R410A can be used

Yes *(Note)

Ye s N o

Ye s Ye s

Ye s N o

Conventional air

conditioner installation

Whether conventional

equipment can be used

Ye s

*(Note)

Ye s

– 8 –

1. SPECIFICATIONS

1-1. Floor console exposed Type

Model name

MML- AP0074H2UL AP0094H2UL AP0124H2UL AP0154H2UL

Cooling capacity kBtu/h 7.5 9.5 12.0 15.4 Heating Capacity kBtu/h 8.5 10.5 13.5 17.0 Electrical Power supply 230V(208V/230V) 1phase 60Hz charastaristics Power consumption 208V kW 0.049 0.049 0.080 0.080

230V kW 0.058 0.058 0.093 0.093

Appearance Silky shade(Munsell 1Y8.5/0.5)

Height In 24.8 24.8 24.8 24.8

Dimension Unit Width In 37.4 37.4 37.4 37.4

Depth In 9.1 9.1 9.1 9.1 Height In 29.0 29.0 29.0 29.0

Packing Width In 41.3 41.3 41.3 41.3

Depth In 12.9 12.9 12.9 12.9

Total weight Unit lbs 81.6 81.6 81.6 81.6

Packing lbs 88.2 88.2 88.2 88.2

Heat exchanger Finned tube

Fan Centrifugal fan

Fan unit Standard air flow(High/Mid/Low) cfm 280 / 250 / 210 280 / 250 / 210 530 / 460 / 380 530 / 460 / 380

Motor W 19 19 45 45

Connecting pipe Gas side In 3/8" 3/8" 3/8" 1/2"

Liquid side In 1/4" 1/4" 1/4" 1/4" Drain port (Nominal dia. mm) 20(Polyvinyl chloride tube)

Sound puressure level (High/Mid./Lo

(*1) 208V dB(A) 39 / 38 / 35 39 / 38 / 35 47 / 44 / 40 47 / 44 / 40

230V dB(A) 42 / 40 / 38 42 / 40 / 38 50 / 46 / 42 50 / 46 / 42

Model name

MML- AP0184H2UL AP0244H2UL

Cooling capacity kBtu/h 18.0 24.0 Heating Capacity kBtu/h 20.0 27.0 Electrical Power supply 230V(208V/230V) 1phase 60Hz charastaristics Power consumption 208V kW 0.098 0.098

230V kW 0.113 0.113

Appearance Silky shade(Munsell 1Y8.5/0.5)

Height In 24.8 24.8

Dimension Unit Width In 37.4 37.4

Depth In 9.1 9.1 Height In 29.0 29.0

Packing Width In 41.3 41.3

Depth In 12.9 12.9

Total weight Unit lbs 88.2 88.2

Packing lbs 94.8 94.8

Heat exchanger Finned tube

Fan Centrifugal fan

Fan unit Standard air flow(High/Mid/Low) cfm 640 / 550 / 460 640 / 550 / 460

Motor W 70 70

Connecting pipe Gas side In 1/2" 5/8"

Liquid side In 1/4" 3/8" Drain port (Nominal dia. mm) 20(Polyvinyl chloride tube)

Sound puressure level

(Hig

h/Mid./Low(*1) 208V dB(A) 51 / 46 / 41 51 / 46 / 41

230V dB(A) 53 / 48 / 43 53 / 48 / 43

Note (*1) The actual value s in an external operating environment are generally higher than the indicated values

due to the contribution from ambient noise.

– 9 –

1-2. Floor console recessed Type

Model name

MML- AP0074BH2UL AP0094BH2UL AP0124BH2UL AP0154BH2UL

230V kW 0.056 0.056 0.056 0.114

Appearance Zinc hot dipping steel plate

Height In 23.6 23.6 23.6 23.6

Dimension Unit Width In 29.3 29.3 29.3 41.1

Depth In 8.7 8.7 8.7 8.7 Height In 26.9 26.9 26.9 26.9

Packing Width In 31.9 31.9 31.9 43.7

Depth In 10.8 10.8 10.8 10.8

Total weight Unit lbs 50.7 50.7 50.7 68.3

Packing lbs 57.3 57.3 57.3 75.0

Heat exchanger Finned tube

Fan Centrifugal fan

Fan unit Standard air flow(High/Mid/Low) cfm 270 / 240 / 180 270 / 240 / 180 270 / 240 / 180 440 / 350 / 290

Motor W 19 19 19 70

Connecting pipe Gas side In 3/8" 3/8" 3/8" 1/2"

Liquid side In 1/4" 1/4" 1/4" 1/4" Drain port (Nominal dia. mm) 20(Polyvinyl chloride tube)

Sound puressure level (High/Mid./Lo

(*1) 208V dB(A) 40 / 36 / 33 40 / 36 / 33 40 / 36 / 33 40 / 36 / 33

230V dB(A) 42 / 39 / 36 42 / 39 / 36 42 / 39 / 36 43 / 39 / 36

Model name

MML- AP0184BH2UL AP0244BH2UL

Cooling capacity kBtu/h 18.0 24.0 Heating Capacity kBtu/h 20.0 27.0 Electrical Power supply 230V(208V/230V) 1phase 60Hz charastaristics Power consumption 208V kW 0.095 0.104

230V kW 0.114 0.120

Appearance Zinc hot dipping steel plate

Height In 23.6 23.6

Dimension Unit Width In 41.1 41.1

Depth In 8.7 8.7 Height In 26.9 26.9

Packing Width In 43.7 43.7

Depth In 10.8 10.8

Total weight Unit lbs 68.3 68.3

Packing lbs 75.0 75.0

Heat exchanger Finned tube

Fan Centrifugal fan

Fan unit Standard air flow(High/Mid/Low) cfm 440 / 350 / 290 560 / 470 / 380

Motor W 70 70

Connecting pipe Gas side In 1/2" 5/8"

Liquid side In 1/4" 3/8" Drain port (Nominal dia. mm) 20(Polyvinyl chloride tube)

Sound

uressure level (High/Mid./Low(*1) 208V dB(A) 40 / 36 / 33 47 / 42 / 35

230V dB(A) 43 / 39 / 36 49 / 44 / 37

Note (*1) The actual value s in an external operating environment are generally higher than the indicated values

due to the contribution from ambient noise.

– 10 –

Mounting hole (wall)

Mounting hole (Floor)

2. CONSTRUCTION VIEWS (EXTERNAL VIEWS)

2-1. Floor Console Exposed Type

MML-AP0074H2UL, AP0094H2UL, AP0124H2UL

Unit : in (mm)

– 11 –

Mounting hole (wall)

Mounting hole (Floor)

MML-AP0154H2UL, AP0184H2UL

Unit : in (mm)

– 12 –

Mounting hole (wall)

MML-AP0244H2UL

Unit : in (mm)

– 13 –

Top Panel

(Discharge Air Flange)

Mounting hole (floor)

Installation Notes:

1. Please make sure the return air opening is not blocked.

2. Air filter is provided with the unit. Before starting the unit, please make sure the air filter is cleaned. There is a possibility of duct and dust accumulation due to construction debris.

3. Provide proper access for the filter replacement or filter cleaning.

4. Make sure the service switch is turned off before accessing any internal components of the unit which includes filter replacement.

Mounting hole (Floor)

2-2. Floor Console Recessed Type

MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL

Unit : in (mm)

– 14 –

MML-AP0154BH2UL, AP0184BH2UL

Unit : in (mm)

Top Panel

Mounting hole (Floor)

(Discharge Air Flange)

Mounting hole (floor)

Installation Notes:

1. Please make sure the return air opening is not blocked.

2. Air filter is provided with the unit. Before starting the unit, please make sure the air filter is cleaned. There is a possibility of duct and dust accumulation due to construction debris.

3. Provide proper access for the filter replacement or filter cleaning.

4. Make sure the service switch is turned off before accessing any internal components of the unit which includes filter replacement.

– 15 –

MML-AP0244BH2UL

Unit : in (mm)

To p Pa n e l

Mounting hole (Floor)

(Discharge Air Flange)

Mounting hole (floor)

Installation Notes:

1. Please make sure the return air opening is not blocked.

2. Air filter is provided with the unit. Before starting the unit, please make sure the air filter is cleaned. There is a possibility of duct and dust accumulation due to construction debris.

3. Provide proper access for the filter replacement or filter cleaning.

4. Make sure the service switch is turned off before accessing any internal components of the unit which includes filter replacement.

– 16 –

3. WIRING DIAGRAM

3-1. Floor Console Exposed Type

MML-AP0074H2UL, AP0094H2UL, AP0124H2UL, AP0154H2UL, AP0184H2UL, AP0244H2UL

Flow selector

unit

Ground screw

Indoor unit

Ground screw

– 17 –

3-2. Floor Console Recessed Type

MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL, AP0154BH2UL, AP0184BH2UL,

AP0244BH2UL

Flow selector

unit

Ground screw

Indoor unit

Ground screw

– 18 –

4. PARTS RATING

Floor Console Exposed Type

Model MML-AP 0074H 0094H 0124H 0154H 0184H 0244H

AF-200-70-4KUAF-200-45-4FUSWA-200U19A4Arotom naF

Running condenser for fan motor AC450 V, 1.5 μF AC450 V, 2 μF AC400 V, 2.5 μF

TT12remrofsnarT

EDM-MD12TF-3rotom esluP

EFM-40YGTFEDM-B25YGTFevlav rotom esluP

Lead wire length: 32" (818 mm) Vinyl tuberosnes AT

0.16" (Ø4) size lead wire length: 47" (1200 mm) Vinyl tube (Blue)rosnes 1CT

0.24" (Ø6) size lead wire length: 47" (1200 mm) Vinyl tube (Black)rosnes 2CT

0.24" (Ø6) size lead wire length: 47" (1200 mm) Vinyl tube (Red)rosnes JCT

Floor Console Recessed Type

Model MML-AP 0074BH 0094BH 0124BH 0154BH 0184BH 0244BH

AF-200-70-4KUSWA-200U19A4Brotom naF

AC400 V, 2.5 μF

AC450 V, 1 μFAC450 V, 1.5 μFrotom naf rof resnednoc gninnuR

TT-12remrofsnarT

EDM-MD12TF-3rotom esluP

EFM-40YGTFEDM-B25YGTFevlav rotom esluP

Lead wire length: 32" (818 mm) Vinyl tuberosnes AT

0.16" (Ø4) size lead wire length: 79" (2000 mm) Vinyl tube (Blue)rosnes 1CT

0.24" (Ø6) size lead wire length: 79" (2000 mm) Vinyl tube (Black)ros

nes 2CT

0.24" (Ø6) size lead wire length: 79" (2000 mm) Vinyl tube (Red)rosnes JCT

– 19 –

5. REFRIGERATING CYCLE DIAGRAM

Air heat exchanger

at indoor side

Fan

Fan motor

Sensor

(TA)

Sensor

(TC1)

Gas sideLiquid side

Strainer

Capillary tube

Pulse Motor Valve (PMV)

Strainer

Sensor

(TCJ)

Sensor

(TC2)

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 subcool in heating operation

3) Recovers refrigerant oil in cooling operation

4) Recovers refrigerant oil in heating operation

(Connector CN104 (2P): White)

1) Detects indoor suction temperature

(Connector CN100 (3P): Brown)

1) Controls PMV super heat in cooling operation

(Connector CN101 (2P): Blue)

1) Controls PMV subcool in heating operation

(Connector CN102 (2P): Yellow)

1) Controls PMV super heat in cooling operation

– 20 –

6. CONTROL OUTLINE

No.

3 Room temp.

control

Item

When power supply is reset

Operation mode selection

Outline of specifications

1) Distinction of outdoor unit When the power supply is reset, the outdoors are

distinguished and the control is selected according to the distinguished result.

2) If resetting the power during a problem, the check code is cleared. After ON/OFF button on the remote control is pushed to resume operation and the problem persists, the check code is again displayed on the remote control.

1) The operation mode is selected based on the operation mode command on the remote control.

1) Adjustment range: Remote control setup temperature (°F [°C] )

Remarks

Wired type

Wireless type

COOL/DRY

64°F [18°C] to 84°F [29°C]

63°F [17°C] to 86°F [30°C]

HEAT

64°F [18°C] to 84°F [29°C]

63°F [17°C] to 86°F [30°C]

2) Using the Item code 06, the setup temperature in heating operation can be corrected.

Default setting

Unless the sensor of the remote control is controlled, there is a shift in the suction temperature during heating operation. (Code No. [32], “0001”)

Setup data 0

Remote control

command

STOP

FAN

COOL

HEAT

Control outline

Air conditioner stops.

Fan operation

Cooling operation

Heating operation

Setup data

Setup temp.

Correction

0246

+0°F +3.6°F +7.2°F +10.8°F

[+0°C] [+2°C] [+4°C] [+6°C]

– 21 –

No.

Item

Automatic capacity control

Outline of specifications

1) Based on the difference between TA and TS, the operation capacity is determined by the outdoor unit.

Remarks

1) Operation with (HH), (H), (L) or [AUTO] mode is carried out by the command from the remote control.

2) When the fan speed mode [AUTO] is selected, the fan speed varies by the difference between TA and TS.

<COOL>

Fan speed selection

TS: Setup temp. TA: Room temp.

HH > H > L > UL

˚F (˚C)

+3.6 (+2)

˚F (˚C)

+1.8 (+1)

+1.8 (+1) Ts

Ts – 1.8 (– 1)

– 1.8 (– 1) – 3.6 (– 2)

COOL HEAT

• Thermostat-off control by a wired remote control

sensor is the same as thermostat-off control by an indoor unit sensor.

• If the fan speed has been changed once, it is not

changed for 3 minutes. However when the air volume changes the fan speed changes.

• When cooling operation has started, select a

downward slope for the fan speed, that is, the high position.

• If the temperature is just on the difference boundary,

the fan speed does not change.

Code No. 32 0000: TA sensor of Indoor

unit

0001: TA sensor of wired

remote control

TA ˚F (˚C)

+5.4 (+3.0)

+4.5 (+2.5)

+3.6 (+2.0)

+2.7 (+1.5)

+1.8 (+1.0)

+0.9 (+0.5)

Tsc

– 0.9 (– 0.5)

HH <HH>

H <HH>

L <H>

L <H> L <L>

< > : Indicate automatic cooling.

F G

– 22 –

No.

Item

Fan speed selection

(Continued)

Outline of specifications

<HEAT>

Remarks

Value in the parentheses indicates one when thermostat of the remote control works.

Value without parentheses indicates one when thermostat of the Indoor unit works.

• If the fan speed has been changed once, it is not changed for 1 minute. However when the air volume changes, the fan speed changes.

• When heating operation has started, select an upward slope for the fan speed, that is, the high position.

• If the temperature is just on the margin the fan speed does not change.

• In TC2 ≥ 140°F[60°C], the fan speed increases by clarify 1 step.

TC2: Indoor heat

exchanger sensor temperature

6 Prevention of

cold air discharge

1. In heating operation, the higher temperature of TC2 sensor

and TCJ sensor is compared with temperature of TC1 sensor and then the lower temperature is used to set the upper limit of the fan tap.

• When B zone has continued for 6 minutes, the operation shifts to C zone.

• In defrost time, the control point is set to +10.8°F[6°C].

TCJ: Temperature of

indoor heat exchanger sensor

TC1: Temperature of

indoor heat exchanger sensor

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

•I

n A zone “ ” is dis-

played.

TA ˚F (˚C)

(– 0.9) – 1.8 [(– 0.5) – 1.0]

(0) Tsh

(+0.9) +1.8 [(+0.5) +1.0]

(+1.8) +3.6 [(+1.0) +2.0]

(+2.7) +5.4 [(+1.5) +3.0]

(+3.6) +7.2 [(+2.0) +4.0]

L <L>

L <H>

H <H>

HH <HH>

H <HH>

Indoor unit thermostat works. Remote control thermostat works.

< > : Indicate automatic heating.

A zone: OFF B zone:

Over 72°F (26°C), below 82°F (28°C), ULTRA LOW (LL) C zone:

Over 82°F (28°C), below 86°F (30°C), LOW (L) D zone:

Over 86°F (30°C), below 90°F (32°C), MED (H) E zone: HIGH (HH)

90 (32)

86 (30)

82 (28)

75 (26)

68 (20)

61 (16)

°F (°C)

– 23 –

°F

(°C)

No.

Item

Freeze prevention control (Low temp. release)

Outline of specifications

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

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

thermostat is forced to turn off.

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

• When “

” zone is detected, the timer is cleared

and the operation returns to the normal operation.

• If “J” zone continues, operation of the indoor fan in

LOW mode will continue until it reaches the “I” zone. It is reset when the following conditions are satisfied.

Reset conditions

1) TC1 > 54°F [12°C] and TC2 > 54°F [12°C] and

TCJ > 54°F [12°C].

2) 20 minutes passed after stop.

Remarks

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 30 minutes, the

thermostat is forced to turn off.

• 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 operation returns to normal operation.

Reset conditions

1) TC1 > 54°F [12°C] and TC2 > 54°F [12°C] and

TCJ > 54°F [12°C].

2) 20 minutes passed after stop.

°F

(°C)

( ) value:

When the power supply is turned on, the thermostat is forced to turn off if the temperature is less than this indicated temperature.

TC1

50°F [10°C]

(41°F [5°C])

32°F [0°C]

TC2, TCJ

14°F

[–10°C]

7°F [–14°C]

TC2, TCJ

41°F [5°C]

28°F [–2.0°C]

∗ In a Model without TC2,

TC2 is not considered.

Recovery control for cooling oil (Refrigerant)

The indoor unit which is in STOP/Thermostat-OFF status or which operates in [FAN] mode performs the following controls when it receives the cooling oil (Refrigerant) recovery signal from the outdoor unit.

1) Opens PMV of the indoor unit with a constant opening degree.

2) Operates the drain pump for approx. 1 minute during recovery control and after finish of control.

• Recovery operation is usually performed every 2 to 5 minutes.

– 24 –

No.

Item

Recovery control for heating refrigerant (Oil)

Compensation control for short intermittent operation

Display of filter sign [

]

∗ Separately set

type TCB-AX21UL is prepared.

Outline of specifications

The indoor unit which is in STOP/Thermostat-OFF status or which operates in [FAN] mode performs the following controls when it receives the heating refrigerant (Oil) recovery signal from the outdoor unit.

1) Opens PMV of the indoor unit with a constant opening degree.

2) Detects temperature of TC2 and then closes PMV.

1) For 3 minutes after start of operation, the operation is continued even if the unit enters in thermostat-OFF condition.

The thermostat is turned OFF in the following cases;

• Case when selecting COOL or HEAT by using

the remote control.

• Case under READY status for operation

• Case when protective control worked

1) The filter sign is displayed with LC by sending the filter-reset signal to the remote control when the specified time (150H) elapsed as a result of integration of the operation time of the indoor fan.

2) The integrated timer is cleared when the filter-reset signal is received from the remote control. In this time, if the specified time elapsed, the counted time is reset and the LC display is deleted.

Remarks

• The indoor unit which is under thermostat-OFF (COOL) status or which operates in [FAN] mode stops the indoor fan and displays [READY ].

• Recovery operation is usually performed every 1 hour. (When there is even 1 indoor unit which the thermostat is off)

[ FILTER] goes on.

Filter time 150H

– 25 –

No.

Item

Display of [READY] [HEAT READY]

Selection of central control mode

Outline of specifications

< READY> Displayed on the remote control

1) When the following check codes are indicated

• Open phase of power supply wiring [P05] was detected.

• There is an indoor unit that detected the indoor overflow [P10].

• There is an indoor unit that detected the interlock alarm [L30].

2) During Force Thermostat-OFF

• [COOL/DRY] operation is unavailable because the other indoor unit operates with [HEAT] mode.

• [HEAT] operation is unavailable because COOL priority (SW11-bit1 of the Outdoor I/F P. C. board is ON) is set and the other indoor unit operates with [COOL/DRY] mode.

3) The above indoor units that cannot operate stay in Thermostat-OFF status.

4) The indoor fan stops because the system performs [Recovery operation for heating refrigerant (Oil)].

<HEAT READY> Displayed on the remote control

1. Normal thermostat. OFF

• During heating, the indoor unit goes thermostat OFF as

the heating temperature setting is reached.

2. During heating, the fan rotates at a breeze speed (UL or lower) or remains stationary to prevent cold air from being discharged (including defrosting operation).

3. Forced thermostat OFF

• “HEAT” operation is unavailable because at least one

indoor unit is operating in “COOL/DRY” mode under priority cooling setting (bit 1 of SW11 on outdoor I/FP.C. board ON).

1) Selection of the contents that can be operated by the remote control at the indoor unit side is possible according to setting at the central control side.

2) Setting contents

• In case of TCC-LINK central control

(O: Operation possible ×: Operation impossible)

Remarks

• <READY > display

No display for wireless type remote control

• <HEAT READY

display

Operation from

TCC-LINK

central control

Individual

OOOOO

[Central 1]

[Central 2]

[Central 3]

[Centr

× ×

O O

× × ×

× ×

O O

× ×

O O O O

al 4]

Operation on RBC-AMT32UL

ON/OFF Operation Timer Temp. Air speed

setting selection setting setting setting

RBC-AMT32UL

[Central control]

display

Save operation 1) The save operation starts when

SAVE

button on the

remote control is turned on.

2) While the save operation is performed,

segment

goes on the screen of the wired remote control.

3) The request capacity ratio is restricted to approx. 75% during save operation.

4) If the save operation was validated, the contents are held during the operation stop, the operation mode change and the resetting of power supply. Therefore the operation at the next time also will be activated with “Save operation is valid”.

– 26 –

7. APPLIED CONTROL AND FUNCTION

7-1. Indoor Control Block Diagram

7-1-1. When Main (Simple) Wired Remote Control Connected

DC5V

CN2 CN1

DC5V

EEPROM

CPU

DC5V

DC12V

DC20V

AB AB

U2U1L2L1

U2U1

U1 U2

EEPROM

Schedule Timer (Weekly timer mode)Main (sub) remote control (up to 2 units)

Power

supply

circuit

Function setting

Key switch

Remote control

communication circuit

Display

LCD

Display

LED

Rechargeable

battery

LCD

driver

Display

LCD

Function setting

Key switch

Power

supply

circuit

Outdoor

unit

Outdoor

unit

Power

source

Power

source

#2 #3

Sameas left

Up to 8 units can

be connected. *1

*1 Only up to 7 units if a

network adaptor is

installed with 2 main

(sub) remote control

connected.

*2 The network

adaptor can

only be

installed in one

unit.

*3 A weekly timer

cannot be

connected to a

sub remote

control.

Indoor/outdoor communication

Network adaptor : "1:1 model" connection interface

TCB-PCNT31TLUL

Outdoor

unit

Indoor unit

Main remote control

:RBC-AMT32UL

Sub remote control

:RBC-AS41UL

Network adaptor (optional)

Switch setting

Power supply circuit

“1:1 Model”

Connection

Interface

Remote control

communication

circuit

Transformer

CPU

Indoor control P.C. board (MCC-1403)

PMV

Louver

motor

Indoor

fan

motor

Power supply circuit

Driver

Remote

control

communication

circuit

TA sensor

TC2 sensor

TC1 sensor

TCJ sensor

CPU

H8/3039

In operation

Alarm

Getting ready

Thermostat ON

COOL

HEAT

FAN

synchronization

signal input circuit

BUS

communication

circuit

External

output

Transformer

Fan motor

control circuit

Power source

208/230-1-60

– 27 –

7-1-2. When Wireless Remote Controlr Kit Connected

DC5V

EEPROM

DC5V

DC12V

DC20V

AB AB AB

U2U1L2L1

U2U1

U1 U2

Outdoor

unit

Outdoor

unit

Power

source

Power

source

#2 #3

Sameas left

Up to 8 units can

be connected. *1

*1 Only up to 7 units if a

network adaptor is

installed with 2

wireless remote

control kits

connected.

*2 The network

adaptor can

only be

installed in one

unit.

Indoor/outdoor communication

Network adaptor : "1:1 model" connection interface

TCB-PCNT31TLUL

Outdoor

unit

Indoor unit

Network adaptor (optional)

Switch setting

Power supply circuit

“1:1 Model”

Connection

Interface

Remote control

communication

circuit

Transformer

CPU

Indoor control P.C. board (MCC-1403)

PMV

Louver

motor

Indoor

fan

motor

Power supply circuit

Driver

Remote

control

communication

circuit

TA sensor

TC2 sensor

TC1 sensor

TCJ sensor

CPU

H8/3039

In operation

Alarm

Getting ready

Thermostat ON

COOL

HEAT

FAN

synchronization

signal input circuit

BUS

communication

circuit

External

output

Transformer

Fan motor

control circuit

Wireless remote control kit

Remote control

communication

circuit

Sensor

section

Display

section

Power source

208/230-1-60

– 28 –

7-1-3. When Both Wired (Simple) Remote Control and

Wireless Remote Control Kit Connected

DC5V

CN2 CN1

DC5V

EEPROM

CPU

DC5V

DC12V

DC20V

AB AB

U2U1L2L1

U2U1

U1 U2

EEPROM

Schedule Timer (Weekly timer mode)Main (sub) remote control (up to 2 units)

Power

supply

circuit

Function setting

Key switch

Remote control

communication circuit

Display

LCD

Display

LED

Rechargeable

battery

LCD

driver

Display

LCD

Function setting

Key switch

Power

supply

circuit

Outdoor

unit

Outdoor

unit

Power

source

Power

source

#2 #3

Sameas left

Up to 8 units can

be connected. *1

*1 Only up to 7

units if a

network

adaptor is

installed.

*2 The network

adaptor can

only be

installed in one

unit.

*3 A weekly timer

cannot be

connected to a

sub remote

control.

Indoor/outdoor communication

Network adaptor : "1:1 model" connection interface

TCB-PCNT31TLUL

Outdoor

unit

Indoor unit

Main remote control

:RBC-AMT32UL

Sub remote control

:RBC-AS41UL

Network adaptor (optional)

Switch setting

Power supply circuit

“1:1 Model”

Connection

Interface

Remote control

communication

circuit

Transformer

CPU

Indoor control P.C. board (MCC-1403)

PMV

Louver

motor

Indoor

fan

motor

Power supply circuit

Driver

Remote

control

communication

circuit

TA sensor

TC2 sensor

TC1 sensor

TCJ sensor

CPU

H8/3039

In operation

Alarm

Getting ready

Thermostat ON

COOL

HEAT

FAN

synchronization

signal input circuit

BUS

communication

circuit

External

output

Transformer

Fan motor

control circuit

Wireless remote control kit

Remote control

communication

circuit

Sensor

section

Display

section

Power source

208/230-1-60

– 29 –

7-1-4. Indoor Printed Circuit Board

MCC-1403

Power supply

transformer

(Primary side)

/CN074

Optional

power supply

/CN309

AC fan output

/CN083

EXCT

/CN073, DC5V

TA sensor

/CN104

External trouble input

/CN080

TCJ sensor

/CN102

TC2 sensor

/CN101

TC1 sensor

/CN100

CHK /CN071, DC5V

DISP /CN72, DC5V

Remote control

/CN41

Optional output

/CN060, DC12V

HA (T10)

/CN061, DC12V

Remote control

power supply LED

/D203

Also used for communication of

the central control system

/CN040

PMV output

/CN082, DC12V

Microcomputer

operation LED

/D002

Power supply transformer (Secondary side)

(AC11V, 14V, 20V) /CN075

Power supply

/CN067

– 30 –

P.C. Board Optional Switch/Connector Specifications

Connector

No.

CN061

CN060

CN080

CN071

CN072

CN073

Pin No.

Specifications

Start / stop input

0 V (COM)

Remote control disabling input

In-operation output

DC 12 V (COM)

Alarm output

DC12 V (COM)

Defrost output

Thermostat-ON output

Cooling output

Heating output

Fan output

DC5 V (COM)

External trouble input

Check mode input

0 V

Display mode input

0 V

Demand input

0 V

Function

Optional output

External trouble input

CHK

Operation check

DISP

Display mode

EXCT

Demand

Remarks

Start / stop input for HA (J01: In place / Removed = Pulse input (factory default) / Step input)

Enables / disables start / stop control via remote control

ON during operation (HA answerback signal)

ON while alarm ON

ON during defrosting of outdoor unit

ON when Real thermostat. ON (Comp. ON)

ON when operation mode is cooling line (Cool, Dry, Cooing/Heating AUTO cooling)

ON when operation mode is heating line (Heat, Cooling/Heating AUTO heating)

ON when indoor fan is ON

Generates test code “L30” and automatically shuts down air conditioner ( only if condition presists for 1 minute) (DN:2A = 2, at shipment from factory)

This check is used for operation check of indoor unit. (The specified operation such as indoor fan “H”, drain pump ON, etc. is executed without communication with outdoor unit or remote control.)

Display mode, communication is enabled by indoor unit and remote control only. (When power supply is turned on.) Timer short (Usual)

Indoor unit forced thermostat-OFF operation

– 31 –

7-2. Functions at test run

Cooling/Heating test run check

The test run for cooling/heating can be performed from either indoor remote control or outdoor interface P.C. board.

1. Start/Finish operation of test run

Test run from indoor remote control

Wired remote control: Refer to the below item of “Test run” of the wired remote control. Wireless remote control: Refer to the next page item of “Test run” of the wireless remote control.

In case of wired remote control

Note)

The test run returns to the normal operation after 60 minutes.

Procedure

Operation contents

Push [TEST] button for 4 seconds or more.

[TEST] is displayed at the display part and the mode enters in TEST mode.

Push [ON/OFF] button.

Change the mode from [COOL] to [HEAT] using [MODE] button.

• Do not use [MODE] button for other mode except [COOL]/[HEAT] modes.

• The temperature cannot be adjusted during test run.

• The trouble detection is performed as usual.

After test run, push [ON/OFF] button to stop the operation. (Display on the display part is same to that in Procedure

Push [TEST] button to clear the TEST mode. ([TEST] display in the display part disappears and status becomes the normal stop status.)

<RBC-AMT32UL>

1, 5

2, 4

ON / OFF

SETTEST

RESE

SAVE

WING/FI

NIT LOUVE

TIMER SE

TMODE

TEST

– 32 –

1. When TEMPORARY button is pushed for 10 seconds or more, Pi!” sound is heard and the operation changes to a forced cooling operation. After approx. 3 minutes, a cooling operation is forced to start. Check if cool air starts blowing. If the operation does not start, check wiring again.

2. To stop a test operation, push TEMPORARY button once again (Approx. 1 second).

• Check wiring / piping of the indoor and outdoor units in forced cooling operation.

TEMPORARY button

Check function for operation of indoor unit (Functions at indoor unit side)

This function is provided to check the operation of the indoor unit without communication with the remote control or the outdoor unit. This function can be used regardless of operation or stop of the system. However, if using this function for a long time, a malfunction of the equipment may be caused. Limit using this function to few minutes only several minutes.

[How to operate]

1) Short-circuit CHK pin (CN071 on the indoor P.C. board). The operation mode differs according to the indoor unit status in that time. Normal time: Both float SW and fan motor are normal. Abnormal time: Either one of float SW or fan motor is abnormal.

2) Restricted to the normal time, if short-circuiting DISP pin (CN072 on the indoor P.C. board) in addition to short-circuit of CHK pin (CN071 on the indoor P.C. board), the minimum opening degree (30pls) can be set to the indoor PMV only. When opening DISP pin, the maximum opening degree (1500pls) can be obtained again.

[How to clear]

Open CHK pin. While the system is operating, it stops once but automatically returns to operation after several minutes.

Fan motor

Indoor PMV (∗)

Communication

P.C. board LED

Short-circuit of CHK pin(CN071)

Normal time

Abnormal time

DISP pin open(CN071) DISP pin short circuit(CN071)

(H) (H) Stop

Max. opening degree (1500pls)

Min. opening degree (30pls) Min. opening degree (30pls)

All ignored All ignored All ignored

Lights Lights Flashes

– 33 –

7-3. Method to Set Indoor Unit Function DN Code

(When performing this task, be sure to use a wired remote control)

<Procedure> To be performed only when system at rest

1 Push the + + buttons simultaneously and hold for at

least 4 seconds.

The unit No. displayed first is the address of the header indoor unit in group control.

Then the fan of the selected indoor unit move.

2 Each time the “Select unit” side of the

UNIT LOUVER

button (button of left side) is pushed, one of the indoor unit Nos. under group control is displayed in turn. Then the fan of the selected indoor unit move.

3 Use the button to select the CODE No. (DN code) of

the desired function.

4 Use the button to select the desired SET DATA

associated with the selected function.

5 Push the button. (The display changes from flashing to

steady.)

• To change the selected indoor unit, go back to step 2.

• To change the selected function, go back to step 3.

6 When the button is pushed, the system returns to normal off state.

– 34 –

Function CODE No. (DN Code) Table (Includes All Functions Needed to Perform Applied Control on Site)

DN Item Description At shipment

Filter display delay timer 0000: None

0002: 2500H 0004: 10000H

0001: 150H 0003: 5000H

According to type

12 Line address 0001: No.1 unit 0030: No.30 unit 0099: Unfixed

Heating temp shift 0000: No shift

0002: +2°C (+3.6°F)

0001: +1°C (+1.8°F) 0010: +10°C (+18°F) (Up to +6 recommended)

0002: +2°C (+3.6°F) (Floor type 0000)

Dirty state of filter 0000: Standard

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

0000: Standard

Central control address 0001: No.1 unit

0099: Unfixed

31 Ventilating fan control 0000: Unavailable 0001: Available 0000: Unavailable

77 Dual set point 0000 : Unavailable 0002 : Available 0000 : Unavailable

FE FS unit address 0001 : No.1 unit 0064 : No.64 unit 0099 : Unfixed 0099 : Unfixed

B3 Soft cooling 0000 : Unavailable 0001 : Available 0001 : Available

32 TA sensor selection 0000: Body TA sensor 0001: Remote control sensor 0000: Body TA sensor 33 Temperature unit select 0000: °C 0001: °F : (at factory shipment) 0001: °F

13 Indoor unit address 0001: No.1 unit 0064: No.64 unit 0099: Unfixedto

Secondary Heating off outside temperature differential

0000 : Unavailable 0001 : -1°C (-1.8°F) to 0010 : -10°C (-18°F) 0000 : Unavailable

Secondary Heating ON/OFF differential temperature

0001 : +0.5°C (+0.9°F) to 0010 : +5°C (+9°F) 0006 : +3°C (+5.4°F)

Secondary Heating operate start differential temperature

0000 : Unavailable 0001 : +0.5°C (+0.9°F) to 0010 : +5°C (+9°F) 0000 : Unavailable

to 0064: No.64 unit 0099: Unfixed

Specific indoor unit priority

0000: No priority 0001: Priority 0000: No priority

Group address 0000: Individual

0002: Follower unit of group

0001: Header unit of group

Automatic restart of power failure

0000: None 0001: Restart 0001: Restart

Selection of option/ trouble input (CN070)

0000: Filter input 0002: External interlock

0001: Alarm input (Option parts) 0002:

External interlock

HA terminal (CN061) select

0000: Usual 0002: Fire alarm input

0001: Leaving-ON prevention control 0000: Usual

(HA terminal)

Timer setting (wired remote control)

0000: Available (can be performed) 0001: Unavailable (cannot be performed)

0000: Available

Priority operation mode (FS unit)

0000 : Heating 0001 : Cooling 0000 : Heating

Outside interlock release condition

0000: Operation stop 0001: Release com munica tion signal receive

0000: Operation stop

Secondary Heating off outside temperature

-0015 : -15°C (5°F) 0015 : 15°C (59°F)to 0000 : 0°C (+32°F)

0099: Unfixed

Existence of [AUTO] mode

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

0001: Not provided

Cooling only 0000: Heat pump

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

0000: Heat pump

Indoor unit capacity 0000: Unfixed 0001 to 0034 According to capacity

type

Type 0010 : Floor Console Exposed

0011 : Floor Console Recessed

Type DN code “10”

Indoor Unit Capacity DN code “11”

Value Type Model

0010 Floor Console Exposed MML-AP

∗∗∗

H2UL

Value Capacity

0000*

0001

0003

0005

Invalid

007 type

009 type

012 type

0011

*1 Default value stored in EEPROM mounted on service P.C. board

*1 Default value stored in EEPROM mounted on service

P.C. board

Floor Console Recessed MML-AP

∗∗∗

BH2UL

Value Capacity

0007

0009

0010

0011

015 type

018 type

021 type

024 type

– 35 –

7-4. Applied Control in Indoor Unit

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

[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/trouble 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) Trouble signal : Output during alarm (Serial communication trouble or indoor/outdoor protective device) operation

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

Input IFCB-4UL : No voltage ON/OFF serial signal Output No voltage contact for operation, check display

Contact capacity: Below Max. AC240V 0.5A

1 2 3 4 5 6

CN61

T10

(YEL)

1 2 3 4

5 6

CN13

CN06

Start/Stop input

ON/OFF serial signal input

Indoor control P.C. board

Remote location ON/OFF control box

(TCB-IFCB-4UL)

COM (GND)

Remote control prohibition/clear input

Operation signal output

COM (+12V)

Trouble signal output

COM

Operation signal output

Check signal output

Power supply 208/230-1-60

– 36 –

Ventilating fan control from remote control

[Function]

• The start/stop operation can be operated from the wired remote control when air to air heat exchanger or ventilating fan 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 control in the following procedure.

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

are simultaneously operable.

1 Push concurrently + + buttons for 4 seconds or more.

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.

2 Every pushing

UNIT LOUVER

button (button of left side), the indoor unit numbers in group control

are displayed successively.

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

3 Using the temperature setup / button, specify the CODE No.

3131

31 .

4 Using the timer time / button, select the SET DATA. (At shipment:

00000000

0000 )

The setup data are as follows:

5 Push button. (OK if display goes on.)

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

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

6 Pushing returns the status to the usual stop status.

2. Wiring

SET DATA

0000 0001

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

Unavailable (At shipment)

Available

121

CN032

FAN DRIVE

(2P WHI)

Outside control input of fan

To terminal

Relay (DC12V, procured locally) Corresponds to the relay up to one that the rated current of the operation coil is approx. 16mA

Indoor control

P.C. board

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

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.)

– 37 –

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 CODE No. 2E 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 indoor unit can be protected if it is forgotten to be turned off.

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

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

1. Control items

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

2) Outside contact OFF : If the indoor unit is operating, it is forced to stop. (Start/Stop prohibited to remote control) (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 control switch in the following procedure. * Use the wired remote control switch when the system is being turned off.

1 Push concurrently + + buttons for 4 seconds or more. 2 Using the temperature setup / button, specify the CODE No.

2E2E

2E .

3 Using the timer time / button, set

00010001

0001 to the setup data.

4 Push button. 5 Push button. (The status returns to the usual stop status.)

3. Wiring

Power peak-cut from indoor unit

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

121

343

565

CN073

T10

(YEL)

Relay (procured locally)

Indoor control P.C. board

Note

)

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

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

Power supply

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

121

EXCT

(2P plug: RED)

CN073

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

Indoor control P.C. board

• Wiring example

– 38 –

Address setup (Manual setting from Wired remote control)

In case that addresses of the indoor units will be determined prior to piping work after wiring work

• Set an indoor unit per a remote control.

• Turn on power supply.

(Example of 2-lines cabling) (Real line: Wiring, Broken line: Refrigerant pipe)

For the above example, perform setting by connecting singly the wired remote control without remote control inter-unit cable.

Group address Individual : 0000 Header unit : 0001 Follower unit : 0002

In case of group control

Outdoor Outdoor

Indoor Indoor Indoor Indoor Indoor

Header unit

Follower

unit

Line address 1

Indoor unit address 1

Group address 1

1 2 2

1 3 2

2 1 2

2 2 2

1 2 3 4 5 6

7891011

END

, 5, 8

3, 6, 9

4, 7, 10

ON / OFF

SETTEST

RESE

SAVE

WING/FI

NIT LOUVE

CODE No.

UNIT

No.

R.C.

No.

TIMER SE

TMODE

SET DATA

TEST

SETTING

00 0 1

A L

1 Push + + buttons

simultaneously for 4 seconds or more.

2 (Line address)

Using the temperature setup

buttons, set

1212

12 to the CODE No.

3 Using timer time / buttons, set

the line address.

4 Push button. (OK when display goes

on.)

5 (Indoor unit address)

Using the temperature setup

buttons, set

1313

13 to the CODE No.

6 Using timer time / buttons, set 1

to the line address.

7 Push button. (OK when display goes

on.)

8 (Group address)

Using the temperature setup

buttons, set

1414

14 to the CODE No.

9 Using timer time / buttons, set

00000000

0000 to Individual,

00010001

0001 to

Header unit and

00020002

0002 to follower unit.

Push button. (OK when display goes on.)

Push button.

Setup completes. (The status returns to the usual stop status.)

Note 1)

When setting the line address from the remote control, do not use Address 29 and 30. As they are addresses which cannot be set to the outdoor unit, if they are set, the check code [E04] (Indoor/ Outdoor communication circuit trouble) is issued.

Note 2)

When an address was manually set from the remote control and the central control over the refrigerant lines is carried out, perform the following setting for the Header unit of each line.

• Set the line address for every line using SW13 and 14 on the interface P.C. board of the Header unit in each line.

• Except the least line address No., turn off SW30-2 on the interface P.C. board of the Header units in the lines connected to the identical central control. (Draw the terminal resistances of indoor/outdoor and central control line wirings together.)

• For each refrigerant line, connect the relay connector between Header unit [U1U2] and [U3U4] terminals.

• After this, set the central control address. (For setting of the central control address, refer to the Installation manual for the central control equipment.)

– 39 –

Confirmation of indoor unit No. position

1. To know the indoor unit addresses though position of the indoor unit is recognized

• In case of individual operation (Wired remote control : indoor unit = 1 : 1) (Follow to the procedure during operation)

1 2

END

Operation

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

TEMP.

1 2 3

END

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

TEMP.

1 Push button (button at left side) if the

unit stops.

2 Push

UNIT LOUVER

button (button at left side).

Unit No. 1-1 is displayed on LCD. (It disappears after several seconds.) The displayed unit No. indicate line address and indoor unit address. (When other indoor units are connected to the identical remote control (Group control unit), other unit numbers are also displayed every pushing

UNIT LOUVER

button(button at left side).

2. To know the position of indoor unit by address

• To confirm the unit No. in the group control (Follow to the procedure during operation) (in this procedure, the indoor units in group control stop.)

The indoor unit numbers in the group control are successively displayed, and fan, louver, and drain pump of the corresponding indoor unit are turned on. (Follow to the procedure during operation)

1 Push and buttons simultaneously

for 4 seconds or more.

• Unit No. ALL is displayed.

• Fans of all the indoor units in the group control operate.

2 Every pushing

UNIT LOUVER

button(button at left side), the unit numbers in the group control are successively displayed.

• The unit No. displayed at the first time indicates

the master unit address.

• Fan of the selected indoor unit only operate.

3 Push button to finish the procedure.

All the indoor units in the group control stop.

– 40 –

How to check all the unit No. from an arbitrary wired remote control

Carry out this procedure when the system is turned off.

The indoor unit No. and the position in the identical refrigerant piping can be checked. An outdoor unit is selected, the identical refrigerant piping and the indoor unit No. are displayed one after the other, and then its fan is on.

1 Push the timer time button + simultaneously for 4 seconds or more.

First line 1 and CODE No.

ACAC

(Address Change) are displayed. (Select outdoor unit.)

2 Select line address using

UNIT LOUVER

SWING/FIX

button.

3 Determine the selected line address using button.

• The address of the indoor unit connected to the refrigerant piping of the selected outdoor unit is

displayed and the fan is on.

4 Every pushing

UNIT LOUVER

button (button at left side), the indoor unit No. in the identical piping is displayed one after the other.

• Only fan of the selected indoor unit start operation.

[To select the other line address]

5 Push button and the operation returns to Procedure 2.

* The indoor address of other line can be continuously checked.

6 Push button and then the procedure finishes.

1 2 3 4 5 6

END

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

TEMP.

– 41 –

How to change an indoor unit address by using a wired remote control

Use this method to change the address of indoor units (one to one or group control) that have had the original address set automatically. This procedure must be done while the units are not operating.

1 Simultaneously push and hold the “SET ”, “CL ”, and “TEST ” buttons for more

than 4 seconds. If there are 2 or more units in a group, the first “UNIT No.” indicated is the header unit.

2 Push the left end of the “UNIT LOUVER

UNIT LOUVER

” button repeatedly to select an indoor unit address to change. If 2 or more units are controlled in a group the fan of the selected unit will be energized.

3 Push the TEMP. / buttons repeatedly to select

1313

13 for CODE No.

4 Push the TIME / buttons repeatedly to change the value indicated in the SET DATA

section.

5 Push the “SET ” button, to save address.

6 Push left and of the “UNIT LOUVER

UNIT LOUVER

” button repeatedly to select another indoor unit addresses to change. Repeat steps 4 through 6 to continue changing indoor unit address and make each of them unique.

7 Push the left end of the “UNIT LOUVER

UNIT LOUVER

” button to review/confirm the revised

addresses.

8 If the addresses have been changed correctly, push the “TEST ” button to finish the

procedure.

ON / OFF

RESE

SAVE

WING/FI

CODE No.

UNIT

R.C.

TIMER SE

TMODE

SET DATA

SETTING

00 00

3 5

2, 6, 7

Fin

– 42 –

How to change all indoor addresses from an arbitrary wired remote control

(It is possible when setting has finished by automatic addresses.)

Contents: The indoor unit addresses in each identical refrigerant piping line can be changed from an

arbitrary wired remote control.

Enter in address check/change mode and then change the address.

<Procedure> Carry out this procedure during stop of system.

1 Push the timer time button + simultaneously for 4 seconds or more.

First line 1 and CODE No.

ACAC

AC (Address Change) are displayed.

2 Select line address using

UNIT LOUVER

SWING/FIX

button.

3 Push the button.

• The address of the indoor unit connected to the

refrigerant piping of the selected outdoor unit is displayed and the fan is on. First the current indoor address is displayed. (Line address is not displayed.)

4 button push up/down the indoor

address of the SET DATA.

The set data is changed to a new address.

5 Push button to determine the set data.

6 Every pushing

UNIT LOUVER

button (button at left side), the indoor unit No. in the identical piping is displayed one after the other.

• Only fan of the selected indoor unit start

operation. Repeat the Procedures 4 to 6 to change all the indoor addresses so that they are not duplicated.

7 Push button.

(All the indications of LCD go on.)

8 Push button and then the procedure

finishes.

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

1 2 3 4 5 6 7 8

END

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

Cancel of line selection

When you want to complete the setting

Finish

TEMP.

If the UNIT No. is not called up here, the outdoor unit in that line does not exist.

Push

button to select a line again in the

Procedure

– 43 –

Function to clear the check code

1. Clearing method from remote control

How to clear the check code of outdoor unit

The currently detected check code of the outdoor unit is cleared by using the service monitor function of the remote control. (Check code of the indoor unit is not cleared.) (Only the check code of the outdoor unit in one refrigerant line system is cleared.)

1 Push + buttons simultaneously for 4 seconds or more to change the mode to service

monitor mode.

2 Push button to set the item code to [

FFFF

FF ].

3 The display of A part in the following figure is counted as “

00050005

0005 ”

ÆÆ

Æ “

00040004

0004 ”

ÆÆ

Æ “

00030003

0003 ”

ÆÆ

“

00020002

0002 ”

ÆÆ

Æ “

00010001

0001 ”

ÆÆ

Æ “

00000000

0000 ” with 5-seconds interval.

When “

00000000

0000 ” appear, the check code was cleared.

* However counting from “0005 ” is repeated on the display screen.

4 When pushing button, the status becomes normal.

How to clear the check code of indoor unit

The check code of indoor unit is cleared by button of the remote control. (Only the check code of the indoor unit connected with remote control to be operated is cleared.)

1 2 3 4

Returns to normal status

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

TEMP.

The currently detected check code of the outdoor unit is cleared by using the service monitor function of the remote control. (Check code of the indoor unit is not cleared.)(Only the check code of the outdoor unit in one refrigerant line system is cleared.)

– 44 –

Monitoring function of remote control switch

When using the remote control (Model Name: RBC-AMT32UL), the following monitoring function can be utilized.

Calling of display <Contents>

The temperature of each sensor of the remote control, indoor unit and outdoor unit and the operating status can be checked by calling the service monitor mode from the remote control.

1 Push + buttons simultaneously for 4 seconds or more to call up the service monitor

mode. The service monitor goes on and firstly the temperature of the CODE No.

0000

00 is displayed.

2 Push button to change CODE No.

(CODE No.) to the CODE No. to be monitored. For display code, refer to the following table.

3 Push

UNIT LOUVER

button (button at left side) to change to item to be monitored. The sensor temperature of indoor unit or outdoor unit in its refrigerant line and the operating status are monitored.

4 Push button to return the status to the normal display.

1 2 3 4

Returns to normal display

4 1

SET

TIME

TIMER SET

TEST

FILTER RESET

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

TEMP.

– 45 –

*1 Only a part of indoor unit types is installed with the discharge air temperature sensor. This temperature is

not displayed for other types. *2 When the units are connected to a group, data of the header indoor unit only can be displayed. *3 The first digit of an CODE No. indicates the outdoor unit number. *4 The upper digit of an CODE No. -4 indicates the outdoor unit number.

1∗, 5∗ ... U1 outdoor unit (Header unit)

2∗, 6∗ ... U2 outdoor unit (Follower unit 1)

3∗, 7∗ ... U3 outdoor unit (Follower unit 2) *5 Only the CODE No. 9* of U1 outdoor unit (Header unit) is displayed.

CODE No. Data name Display format Unit Remote control display example

Indoor unit data *

Outdoor unit individual data 1 *

System data

00 01 02 03 04 05 06 08 F3

Room temperature (Use to control) Room temperature (Remote control) Indoor suction air temperature (TA) Indoor coil temperature (TCJ) Indoor coil temperature (TC2) Indoor coil temperature (TC1) Indoor discharge air temperature (TF) *

Indoor PMV opening Filter sign time

×1 ×1 ×1 ×1 ×1 ×1 ×1

×1/10

×1

°C °C

°F °F °F °F °F

pls

[0027] = 27 °C

[0150]= 1500 pls [2500] = 2500h

[0080] = 80 °F

CODE No.

Data name Display format Unit Remote control display example

1A 1C 1D 1E

20 21 22 23 25 26 27 28 29

2A 2C 2D

U3 30 31 32 33 35 36 37 38 39 3A 3C 3D 3E 3F

High-pressure sensor detention pressure (Pd) Low-pressure sensor detention pressure (Ps) Compressor 1 discharge temperature (TD1) Compressor 2 discharge temperature (TD2) Outdoor coil temperature (TE1) Outdoor coil temperature (TE2) Outdoor coil temperature (TG1) Outdoor coil temperature (TG2) Outside ambient temperature (TO) Suction temperature (TS1) Suction temperature (TS3) Temperature at liquid side (TL1) Temperature at liquid side (TL2) Temperature at liquid side (TL3)

×10 ×10

×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1

psi psi

°F °F °F °F °F °F °F °F °F °F °F °F

[4350] = 435 psi

[0080]= 80 °F

CODE No. Data name Display format Unit Remote control display example

90 Heating/cooling recovery controlled 0: Normal [0010]=Heating recovery controlled

0: Normal 1: Release controlled

92 Discharge temperature release [0001]=Discharge temperature release controlled

91 Pressure release [0010]=Pressure release controlled

93 Follower unit release (U2/U3 outdoor units) [0100]=U2 outdoor unit release controlled

Suction temperature of air to air heat exchanger (TSA) *

×1 °F

[0080]= 80 °F FA 0A 0B 0C 0D

Outside air temperature (TOA)*

No. of connected indoor units Total horsepower of connected indoor units No. of connected outdoor units Total horsepower of outdoor units

×1 ×1

×10

×1

×10

°F unit ton unit ton

[0048]= 48 units [0215]= 21.5 ton [0003]= 3 units [0160]= 16 ton

Outdoor unit individual data 2 *

Outdoor unit

individual

data 3 *

CODE No.

Data name Display format Unit Remote control display example

50 51 52

60 61 62

U3 70 71 72

PMV1 opening PMV3 opening PMV4 opening

[0500] = 500pls

[0058] = 58 mode

[0080] = 8 ton

[0024] = 24 °F

[0642] = 64.2rps

[0135] = 13.5A

×1 ×1 ×1

pls pls pls

56 57

59 5A 5B 5D 5E

66 67 69 6A 6B

6E 6F

76 77 79 7A 7B 7D 7E 7F

Compressor 1 revolutions Compressor 2 revolutions Outdoor fan mode Compressor IPDU 1 heat sink temperature Compressor IPDU 2 heat sink temperature Outdoor fan IPDU 1 heat sink temperature Outdoor fan IPDU 2 heat sink temperature Outdoor unit horsepower

×10 ×10

×1 ×1 ×1 ×1 ×1

×10

rps rps

mode

°F °F °F °F

ton

54 64 74

1 fan model : Compressor 2 and Outdoor fan 1 current (I2) 2 fan model : Compressor 2 and Outdoor fan 2 current (I2)

×10 A

53 63 73

1 fan model : Compressor 1 curent (I1) 2 fan model : Compressor 1 and Outdoor fan 1 current (I1)

×10 A

< Based on the SMMS-e >

– 46 –

Changing of settings for Celsius display

• Push ON / OFF button if the unit stops.

Procedure 1

Push simultaneously + + buttons for 4 seconds or more. After a while, the display part flashes as shown right. Check the displayed CODE No. is [10 ].

• When the CODE No. is other than [10 ], push button to erase the display and repeat procedure from the

first step. (After pushing button, operation of the remote control is not accepted for approx. 1 minute.) (For a group control, No. of the firstly displayed indoor unit becomes the header unit.)

Procedure 2

Every time the button is pushed,

UNIT LOUVER

(button at left side), the indoor unit No. in the group control is displayed in order. Select the indoor unit of which setup is changed. In this time, the position of the indoor unit of which setup is changed can be confirmed because fan of the selected indoor unit will operate.

Procedure 3

1. Using temp. setup buttons, specify CODE No. [33 ].

(CODE No. [33 ]: Fahrenheit display)

2. Using timer buttons, change the line address from [0001 ] to [0000 ]

3. Push button. In this time, the setup finishes when the display changes

from flashing to lighting.

Procedure 4

After verifying the content change, push button. (Setup is determined.) When pushing button, the display disappears and the status becomes the usual stop status. (When pushing button the operation from the remote control is not accepted for approx. 1 minute.)

• If the operation from the remote control is not accepted after 1 minute of pushing the button, it is considered

that the address setup is incorrect. In this case, the automatic address must be set up again. When changing the settings from Celsius to Fahrenheit follow the reverse order of the above procedure.

CODE No.

UNIT

No.

R.C.

No.

SET DATA

SETTING

CODE No.

UNIT

No.

R.C.

No.

SET DATA

SETTING

6 1

– 47 –

8. TROUBLESHOOTING

8-1. Overview

(1) Before engaging in troubleshooting

(a) Applicable models

All Super Module Multi (SMMS-i, SMMS-e) models. (Indoor units: MM∗-AP

∗∗∗

, Outdoor units: MMY-MAP

∗∗∗

)

(b) Tools and measuring devices required

• Screwdrivers (Philips, flat head), spanners, long-nose pliers, nipper, pin to push reset switch, etc.

• Multimeter, thermometer, pressure gauge, etc.

(2) Troubleshooting procedure

When a trouble occurs, proceed with troubleshooting in accordance with the procedure shown below.

NOTE

Rather than a genuine trouble (see the List of Check Codes below), the problem could have been caused by a microprocessor malfunction attributable to a poor quality of the power source or an external noise. Check for possible noise sources, and shield the remote control wiring and signal wires as necessary.

NO. Behavior Possible cause

A compressor would not start • Could it just be the 3-minute delay period (3 minutes after compressor

shutdown)?

• Could it just be the air conditioner having the thermostat set to OFF?

• Could it just be the air conditioner operating in fan mode or put on the timer?

• Could it just be the system going through initial communication?

An indoor fan would not start • Could it just be cold air discharge prevention control, which is part of

heating?

An outdoor fan would not start or would change speed for no reason

• Could it just be cooling operation under low outside temperature conditions?

• Could it just be defrosting operation?

An indoor fan would not stop • Could it just be the elimination of residual heat being performed as part of

the air conditioner shutdown process after heating operation?

The air conditioner would not respond to a start/stop command from a remote control

• Could it just be the air conditioner operation under external or remote contro

Trouble

Any other trouble

Check code displayed on interface P.C. board of header unit

Check code displayed on interface P.C. board of relevant follower unit

Check trouble location or trouble part

"E28" trouble

– 48 –

Check code

Display of receiving unit

Typical problem site Description of Check code

Outdoor 7-segment display Indicator light block

Sub-code

Flash

E03

Indoor-remote control periodic communication trouble

Communication from remote control or network adaptor has been lost (so has central control communication).

E04

––

Indoor-outdoor periodic communication trouble

Signals are not being received from outdoor unit.

E08 E08

.nwo sti ot lacitnedi sserdda stceted tinu roodnIsserdda roodni detacilpuDsserdda roodni detacilpuD

E10

Indoor inter-MCU communication trouble

MCU communication between main control and motor microcontroller is faulty.

E18

Trouble in periodic communication between indoor header and follower unit

Periodic communication between indoor header and follower units cannot be maintained.

TLA––10F

Indoor heat exchanger temperature sensor (TCJ) trouble

Heat exchanger temperature sensor (TCJ) has been open/short-circuited.

TLA––20F

Indoor heat exchanger temperature sensor (TC2) trouble

Heat exchanger temperature sensor (TC2) has been open/short-circuited.

TLA––30F

Indoor heat exchanger temperature sensor (TC1) trouble

Heat exchanger temperature sensor (TC1) has been open/short-circuited.

TLA––01F

Room air temperature sensor (TA/TSA) trouble

Room air temperature sensor (TA) has been open/short-circuited.

TLA––11F

Discharge air temperature sensor (TF/TFA) trouble

Discharge air temperature sensor (TF) has been open/short-circuited.

MIS––92F

P.C. board or other indoor trouble

Open/Short of indoor air suction temperature sensor (TRA) was detected.

MIS––30L

Duplicated indoor group header unit

There is more than one header unit in group.

MIS––70L

Connection of group control cable to stand-alone indoor unit

There is at least one stand-alone indoor unit to which group control cable is connected.

MIS–80L80L

Indoor group address not set

Address setting has not been performed for one or more indoor units (also detected at outdoor unit end).

MIS––90L

Indoor capacity not set

Capacity setting has not been performed for indoor unit.

MIS––02L

Duplicated central control address

There is duplication in central control address setting.

L30

Detected indoor unit No.

SIM

Indoor external trouble input (interlock)

Unit shutdown has been caused by external trouble input (CN080).

TLA––10P

Indoor AC fan trouble

Indoor AC fan trouble is detected (activation of fan motor thermal relay).

––

L30

TLA––13P

Other indoor unit trouble

Follower unit cannot be operated due to header unit alarm (E03/L03/L07/L08).

IPDU: Intelligent Power Drive Unit (Inverter P.C. board)

: Lighting, : Flashing, : Goes off ALT.: Flashing is alternately when there are two flashing LED SIM: Simultaneous flashing when there are two flashing LED

Operation

Timer Ready

TCC-LINK central

control or main

remote control

display

ALT

Outside air suction temperature sensor (TOA) trouble

Open/Short of outside air suction temperature sensor (TOA) was detected.

ALT

Indoor air suction temperature sen sor (TRA) trouble

Discharge air temperature sensor (TF) has been open/short-circuited.

––F17

––F18

8-2. Troubleshooting Method

The remote controls (main remote control and central control remote control) and the interface P.C. board of an outdoor unit are provided with an LCD display (remote control) or a 7-segment display (outdoor interface P.C. board) to display operational status. Using this self-diagnosis feature, the problem may be identified in the event of a problem by following the method described below.

The list below summarizes check codes detected by various devices. Analyze the check code according to where it is displayed and work out the nature of the problem in consultation with the list.

• When investigating a problem on the basis of a display provided on the indoor remote control or TCC-LINK central control remote control - See the “TCC-LINK remote control or main remote control display” section of the list.

• When investigating a problem on the basis of a display provided on an outdoor unit - See the “Outdoor 7segment display” section of the list.

• When investigating a problem on the basis of a wireless remote control-controlled indoor unit - See the “Light sensor indicator light block” section of the list.

List of Check Codes (Indoor Unit)

(Check code detected by indoor unit)

– 49 –

(Trouble detected by main remote control)

(Trouble detected by central control device)

Note:The same trouble, e.g. a communication trouble, may result in the display of different check codes

depending on the device that detects it. Moreover, check codes detected by the main remote control/central control device do not necessarily have a direct impact on air conditioner operation.

Check code

Display of receiving unit

Typical fault site Description of trouble

Outdoor 7-segment display Indicator light block

Sub-code

Flash

E01 – –

No master remote control, faulty remote control communication (reception)

Signals cannot be received from indoor unit; master remote control has not been set (including two remote control).

E02 – –

Faulty remote control communication (transmission)

Signals cannot be transmitted to indoor unit.

E09 – –

Duplicated master remote control

Both remote controls have been set as master remote control in two remote control (alarm and shutdown for header unit and continued operation for follower unit)

Operation

Timer Ready

Main remote control

Check code

Display of receiving unit

Typical fault site Description of trouble

TCC-LINK central

control

Outdoor 7-segment display Indicator light block

Sub-code

Flash

C05 – –

No indication (when main remote control also in use)

Faulty central control communication (transmission)

Central control device is unable to transmit signal due to duplication of central control device

C06 – –

Faulty central control communication (reception)

Central control device is unable to receive signal.

– – – Multiple network adapters

Multiple network adapters are connected to remote control communication line.

C12 – – –

Blanket alarm for generalpurpose device control interface

Device connected to general-purpose device control interface for TCC-LINK is

faulty.

P30 – –

As per alarm unit (see above)

Group control follower unit trouble

Group follower unit is faulty (unit No. and above detail [ ] displayed on main remote control)

Operation

Timer Ready

– 50 –

Check code

Display of receiving unit

Typical problem site Description of problem

Outdoor 7-segment display

TCC-LINK

central control

or main remote

control display

Indicator light block

Sub-code

Flash

E06

Number of indoor units from which signal is received normally

Signal lack of indoor unit

60E

Indoor unit initially communicating normally fails to return signal (reduction in number of indoor units connected).

E07 – (E04)

Indoor-outdoor communication circuit trouble

Signal cannot be transmitted to indoor units (

indoor units left without communication from

outdoor unit).

E08 Duplicated indoor address

(E08)

Duplicated indoor address

More than one indoor unit are assigned same address (also detected at indoor unit end).

E12

01: Indoor-outdoor communication 02: Outdoor-outdoor communication

E12

Automatic address starting trouble

Indoor automatic address setting is started while

automatic address setting for equipment in other refrigerant line is in progress.

Outdoor automatic address setting is started

while automatic address setting for indoor units is in progress.

E15 – E15

Indoor unit not found during automatic address setting

Indoor unit fails to communicate while automatic address setting for indoor units is in progress.

E16

00: Overloading 01: Number of units connected

E16

Too many indoor units connected/overloading

Combined capacity of indoor units is too large (more than 135% of combined capacity of outdoor units).

E19

00: No header unit 02: Two or more header units

E19

Trouble in number of outdoor header units

There is no or more than one outdoor header unit in one refrigerant line.

E20

01: Connection of outdoor unit from other refrigerant line 02: Connection of indoor unit from other refrigerant line

E20

Connection to other refrigerant line found during automatic address setting

Indoor unit from other refrigerant line is detected while indoor automatic address setting is in progress.

E23 – E23

Outdoor-outdoor communication transmission trouble

Signal cannot be transmitted to other outdoor units.

E25 – E25

Duplicated follower outdoor address

There is duplication in outdoor addresses set manually.

E26

Address of outdoor unit from which signal is not received normally

E26

Signal lack of outdoor unit

Follower outdoor unit initially communicating normally fails to do so (reduction in number of follower outdoor units connected).

Outdoor follower unit trouble

82E.oN tinu roodtuo detce

teD82E

utdoor header unit detects fault relating to follower outdoor unit (detail displayed on follower outdoor unit).

13E13E

There is no communication between IPDUs (P.C. boards) in inverter box.

TLA40F–40F

Outdoor discharge temperature sensor (TD1) trouble

Outdoor discharge temperature sensor (TD1) has been open/short-circuited.

F05 –

F05

ALT

Outdoor discharge temperature sensor (TD2) trouble

Outdoor discharge temperature sensor (TD2) has been open/short-circuited.

F06

01: TE1 02: TE2

TLA60F

Outdoor heat exchanger liquid side temperature sensor (TE1, TE2) trouble

Outdoor heat exchanger liquid side temperature sensors (TE1, TE2) have been open/shortcircuited.

TLA70F70F

01: TL1 02: TL2 03: TL3

Outdoor liquid temperature sensor (TL1, TL2, TL3) trouble

Outdoor liquid temperature sensor (TL1, TL2, TL3) has been open/short-circuited.

TLA80F–80F

Outdoor outside air temperature sensor (TO) trouble

Outdoor outside air temperature sensor (TO) has been open/short-circuited.

IPDU: Intelligent Power Drive Unit (Inverter P.C. board)

: Lighting, : Flashing, : Goes off ALT.: Flashing is alternately when there are two flashing LED SIM: Simultaneous flashing when there are two flashing LED

Operation

Timer Ready

Circle (O): IPDU trouble

IPDU communication trouble Sub MCU

communication trouble

80 : Communication trouble between MCU and Sub MCU

1212 1212

01 10

02 11

03 12

08 13

09 18

0A 19

0B 1A

O O

O O O O

O O O O O O O

O O O O

O O

A3-IPDU A3-IPDU Fan-IPDUFan-IPDU

List of Check Codes (Outdoor Unit)

(Check code detected by SMMS-e outdoor interface - typical examples)

If “HELLO” is displayed on the oudoor 7-segment for 1 minute or more, turn off the power supply once and then turn on the power supply again after 30 seconds or more. When the same symptom appears, it is considered there is a possibility of I/F board trouble.

– 51 –

TLA21F21F

Outdoor suction temperature sensor (TS1,TS3) trouble

Outdoor suction temperature sensor (TS1,TS3) has been open/short-circuited.

TLA51F–51F

Outdoor temperature sensor (TE1,TL1) wiring trouble

Wiring trouble in outdoor temperature sensors (TE1,TL1) has been detected.

TLA61F–61F

Outdoor pressure sensor (Pd, Ps) wiring trouble

Wiring trouble in outdoor pressure sensors (Pd, Ps) has been detected.

–TLA32F32F

Low pressure sensor (Ps) trouble

Output voltage of low pressure sensor (Ps) is zero.

TLA42F–42F

High pressure sensor (Pd) trouble

Output voltage of high pressure sensor (Pd) is zero or provides abnormal readings when compressors have been turned off.

Outdooe EEPROM troubleMIS13F–13F

Outd

oor EEPROM is faulty (alarm and shutdown for header unit and continued operation for follower unit)

H05 – H05

Outdoor discharge temperature sensor (TD1) wiring trouble

Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD1) has been detected

H06 – H06

Activation of low-pressure protectio

Low pressure (Ps) sensor detects abnormally low operating pressure.

noitcet

orp level lio woL70H–70H

Temperature sensor for oil level detection (TK1,TK2,TK4,TK5) detects abnormally low oil level.

H08

01: TK1 sensor trouble 02: TK2 sensor trouble 04: TK4 sensor trouble 05: TK5 sensor trouble

H08

Trouble in temperature sensor for oil level detection (TK1,TK2,TK4,TK5)

Temperature sensor for oil level detection (TK1,TK2,TK4,TK5) has been open/shortcircuited.

H15 – H15

Outdoor discharge temperature sensor (TD2) wiring trouble

Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD2) has been detected.

H16

01: TK1 oil circuit trouble 02: TK2 oil circuit trouble 04: TK4 oil circuit trouble 05: TK5 oil circuit trouble

H16

Oil level detection circuit trouble

No temperature change is detected by temperature sensor for oil level detection (TK1,TK2,TK4,TK5) despite compressor having been started.

MIS40L–40L

Dup

licated outdoor

refrigerant line address

Identical refrigerant line address has been assigned to outdoor units belonging to different refrigerant piping systems.

L06

Number of priority indoor units (check code L05 or L06 depending on individual unit)

MIS50L

Duplicated priority indoor unit (as displayed on priority indoor unit)

More than one indoor unit have been set up as priority indoor unit.

MIS60L

Duplicated priority indoor unit (as displayed on indoor unit other than priority indoor unit)

More than one indoor unit have been set up as priority indoor unit.

MIS)80L(

–80L

Indoor group address not set

Address setting have not been performed for one or more indoor units (also detected at indoor end).

tes ton yticapac roodtuOMIS01L–01L

Outdoor unit capacity has not been set (after P.C. board replacement).

MIS71L–71L

Outd

oor model

incompatibility trouble

Old model outdoor unit (prior to 6 series) has been connected.

MIS82L–82L

Too many outdoor units connected

More than three outdoor units have been connected.

Check code

Display of receiving unit

Typical problem site Description of problem

Outdoor 7-segment display

TCC-LINK

central control

or main remote

control display

Indicator light block

Sub-code

Flash

Operation

Timer Ready

01: TG1 02: TG2

F09

Outdoor heat exchanger gas side temperature sensors (TG1, TG2) have been open/

-short circuited.

Outdoor heat exchanger gas side temperature sensor (TG1, TG2) trouble

01: TS1 03: TS3

SIM

L23

–

L23

SW setting mistake

Bit 3 and 4 of SW17 are turning on.

– 52 –

MG-CTT: Magnet contactor

Trouble in number IPDUsMIS92L92L

There are insufficient number of IPDUs (P.C. boards) in inverter box.

MIS)03L(.oN tinu roodni detceteD03L

Indoor external trouble input (interlock)

Indoor unit has been shut down for external trouble input in one refrigerant line (detected by indoor unit).

TLA30P–30P

Outdoor discharge (TD1) temperature trouble

Outdoor discharge temperature sensor (TD1) has detected abnormally high temperature.

P05

00: Open phase detected

TLA50P

Open phase/power failure

Open phase is detected when power is turned on. Inverter DC voltage is too high (overvoltage) or too low (undervoltage).

01: Compressor 1 02: Compre

ssor 2

Inverter DC voltage (Vdc) trouble MG-CTT trouble

P07

01: Compressor 1 02: Compressor 2

TLA70P

Heat sink overheating trouble

Temperature sensor built into IPM (TH) detects overheating.

wol

frevo tinu roodnITLA)01P(detceted .oN tinu roodnI01P

Indoor unit has been shutdown in one refrigerant line due to detection of overflow (detected by indoor unit).

TLA31P–31P

Outdoor liquid backflow detection trouble

State of refrigerant cycle circuit indicates liquid backflow operation.

P15

01: TS condition 02: TD condition

noitceted kael saGTLA51P

Outdoor suction temperature sensor (TS1) detects sustained and repeated high temperatures that exceed standard value.

A71P–71P

Outdoor discharge (TD2) temperature trouble

Outdoor discharge temperature sensor (TD2) detects abnormally high temperature.

TLA91Pdetceted .oN tinu roodtuO91P

4-way valve reversing trouble

Abnormality in refrigerating cycle is detected during heating operation.

TLA02P–02P

Activation of high-pressure protection

High pressure (Pd) sensor detects high pressure that exceeds standard value.

Check code

Display of receiving unit

Typical problem site Description of problem

Outdoor 7-segment display

TCC-LINK

central control

or main remote

control display

Indicator light block

Sub-code

Flash

Operation

Timer Ready

1212 1212

01 10

02 11

03 12

08 13

09 18

0A 19

0B 1A

O O

O O O O

O O O O O O O

O O O O

O O

A3-IPDU A3-IPDU Fan-IPDUFan-IPDU

Circle (O): IPDU trouble

– 53 –

(Check code detected by IPDU featuring in SMMS-e standard outdoor unit - typical examples)

Note: The above check codes are examples only, and different check codes may be displayed depending on

the outdoor unit configuration

Check code

Display of receiving unit

Typical problem site Description of proplem

Outdoor 7-segment display

TCC-LINK central control or main remote

control display

Indicator light block

Sub-code

Flash

F13

01: Compressor 1 02: Compressor 2

TLA31F

Trouble in temperature sensor built into indoor IPM (TH)

Temperature sensor built into indoor IPM (TH) has been open/short-circuited.

H01

01: Compressor 1 02: Compressor 2

nwodkaerb rosserpmoC10H

Inverter current (Idc) detection circuit detects overcurrent.

H02

01: Compressor 1 02: Compressor 2

H02

Compressor trouble (lockup)

Compressor lockup is detected

H03

01: Compressor 1 02: Compressor 2

H03

Current detection circuit trouble

Abnormal current is detected while inverter compressor is turned off.

P04

01: Compressor 1 02: Compressor 2

TLA40P

Activation of high-pressure SW

High-pressure SW is activated.

P07

01: Compressor 1 02: Compressor 2

TLA70P

Heat sink overheating trouble

Temperature sensor built into IPM (TH) detects overheating or has been short-circuited.

P22

#0:Element short circuit #1:Position detection circuit trouble #3:Motor lock trouble #4:Motor current trouble #C:TH Sensor temperature trouble #D:TH Sensor short circuit/release

trouble #E:Vdc voltage trouble ∗Put in Fan IPDU No. in [#] mark

Outdoor fan IPDU detects trouble.Outdoor fn IPDU troubleTLA22P

P26

01: Compressor 1 02: Compressor 2

TLA62P

Activation of IPM short-circuit protection

Short-circuit protection for compressor motor driver circuit components is activated (momentary overcurrent).

P29

01: Compressor 1 02: Compressor 2

TLA92P

Compressor position detection circuit trouble

Compressor motor position detection trouble is detected.

Operation

Timer Ready

– 54 –

8-3. Troubleshooting Based on Information Displayed on Remote Control

Using main remote control (RBC-AMT32UL)

Check code

Indoor unit No. in which fault has occurred

321

Normal display is restored.

Steps to follow

SET

TIMER SE

TESTRE

SAVE

WING/F

MOD

ON / OF

NIT LOUVE

012 345 67 89 A bC dEFHJL P

<7-segment display symbols>

(1) Checking and testing When a fault occurs to an air conditioner, a check

code and indoor unit No. are displayed on the display window of the remote control. Check codes are only displayed while the air conditioner is in operation. If the display has already disappeared, access trouble history by following the procedure described below.

(2) Trouble history The trouble history access procedure is

described below (up to four troubles stored in memory). Trouble history can be accessed regardless of whether the air conditioner is in operation or shut down.

<Procedure> To be performed when system at rest

1 Invoke the SERVICE CHECK mode by pushing the +

buttons simultaneously and holding for at least 4

seconds.

The letters “ SERVICE CHECK” light up, and the check code “01” is displayed, indicating the trouble history. This is accompanied by the indoor unit No. to which the trouble history is related and a check code.

2 To check other trouble history items, push the

bu another check code.

Check code “01” Check code “04” (oldest) Note: Err i ntains four items.

3 When the button is pushed, normal display is

restored.

REQUIREMENT

Do not pu button as it would erase the whole trouble history of the indoor unit.

How to read displayed information

– 55 –

Using indoor unit indicators (receiving unit light block) (wireless type)

To identify the check code, check the 7-segment display on the header unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “8-2. Troubleshooting Method”.

: Goes off : Lighting : Blinking (0.5 seconds)

tluaf fo esuaCedoc kcehCkcolb thgiL

– Power turned off or trouble in wiring between receiving and indoor units

E01 Faulty reception

Receiving unit

Trouble or poor contact in wiring between receiving and indoor units

E02 Faulty transmission

E03 Loss of communication

E08 Duplicated indoor unit No. (address)

Setting trouble

E09 Duplicated master remote control

E10 Indoor unit inter-MCU communication trouble

E12 Automatic address starting trouble

E04

Trouble or poor contact in wiring between indoor and outdoor units (loss of indoor-outdoor communication)

E06 Faulty reception in indoor-outdoor communication (

Signal lack of indoor unit)

E07 Faulty transmission in indoor-outdoor communication

E15 Indoor unit not found during automatic address setting

E16 Too many indoor units connected/overloading

9 Trouble in number of outdoor header units

E20 Detection of refrigerant piping communication trouble during automatic address setting

E23 Faulty transmission in outdoor-outdoor communication

E25 Duplicated follower outdoor address

E26 Faulty reception in outdoor-outdoor communication,

Signal lack of outdoor unit

E28 Outdoor follower unit trouble

E31 IPDU communication trouble, sub MCU communication trouble

P01 Indoor AC fan trouble

P13 Outdoor liquid backflow detection trouble

P03 Outdoor discharge (TD1) temperature trouble

P04 Activation of outdoor high-pressure SW

P05

Open phase/power failure Inverter DC voltage (Vdc) trouble MG-CTT trouble

P07

Outdoor heat sink overheating trouble - Poor cooling of electrical component (IPM) of outdoor unit

P15 Gas leak detection - insufficient refrigerant charging

P17 Outdoor discharge (TD2) temperature trouble

P19 Outdoor 4-way valve reversing trouble

P20 Activation of high-pressure protection

P22 Outdoor fan IPDU trouble

P26 Outdoor

IPM short-circuit trouble

9 Compressor position detection circuit trouble

P31 Shutdown of other indoor unit in group due to fault (group follower unit trouble)

E18 Trouble or poor contact in wiring between indoor units, indoor power turned off

Operation Timer Ready

All lights out

Blinking

Operation Timer Ready

Blinking

Operation Timer Ready

Alternate blinking

Operation Timer Ready

Alternate blinking

Operation Timer Ready

MG-CTT: Magnet contactor

– 56 –

F01

Indoor unit temperature sensor troubles

F02

F03

F10

F11

Heat exchanger temperature sensor (TCJ) trouble

Heat exchanger temperature sensor (TC2) trouble

Heat exchanger temperature sensor (TC1) trouble

Ambient temperature sensor (TA/TSA) trouble

Discharge temperature sensor (TF) trouble

F04

Outdoor unit temperature sensor troubles

F05

F06

F07

F08

F12

F13

Discharge temperature sensor (TD1) trouble

Discharge temperature sensor (TD2) trouble

Heat exchanger temperature sensor (TE1, TE2) trouble

Liquid temperature sensor (TL1, TL2, TL3) trouble

Outside air temperature sensor (TO) trouble

Suction temperature sensor (TS1,TS3) trouble

Heat sink sensor (TH) trouble

F15

Wiring trouble in heat exchanger sensor (TE1) and liquid temperature sensor (TL1) Outdoor unit temperature sensor wiring/installation trouble

F16

Wiring trouble in outdoor high pressure sensor (Pd) and low pressure sensor (Ps) Outdoor pressure sensor wiring trouble

F23 Low pressure sensor (Ps) trouble

High pressure sensor (Pd) trouble

Outdoor unit pressure sensor troubles

F24

F29 Fault in indoor EEPROM

H01 Compressor breakdown

Compressor lockup

Current detection circuit trouble

Outdoor unit compressor or A-3-IPDU related troubles

H02

H03

H05 Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD1)

H06 Abnormal drop in low-pressure sensor (Ps) reading

Abnormal drop in oil level

Protective shutdown of outdoor unit

H07

H08

Trouble in temperature sensor for oil level detection circuit (TK1, TK2, TK4 or TK5)

H15 Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD2)

H16

Oil level detection circuit trouble - Trouble in outdoor unit TK1, TK2, TK4 or TK5 circuit

L03 Duplicated indoor group header unit

L05 Duplicated priority indoor unit (as displayed on priority indoor unit)

L06 Duplicated priority indoor unit (as displayed on indoor unit other than priority indoor unit)

L07 Connection of group control cable to stand-alone indoor unit

L08 Indoor group address not set

L09 Indoor capacity not set

L04 Duplicated outdoor refrigerant line address

L10 Outdoor capacity not set

L20 Duplicated central control address

L28 Too many outdoor units connected

L29 Trouble in number of IPDUs

L30 Indoor external interlock trouble

tluaf fo esuaCedoc kcehCkcolb thgiL

L24 Flow selector unit(s) setting trouble

Alternate blinking

Operation Timer Ready

Alternate blinking

Operation Timer Read

Operation

Synchronized blinking

Timer Ready

Operation Timer Ready

Blinking

Operation

Synchronized blinking

Timer Ready

Operation

Synchronized blinking

Timer Ready

L23 SW setting mistake

F17

F18

Outside air suction temperature sensor (TOA) trouble

Indoor air suction temperature sensor (TRA) trouble

L02 Outdoor unit model unmatched trouble

– 57 –

Other (indications not involving check code)

F31 Outdoor EEPROM trouble

Light block Check code Cause of fault

– Test run in progress

–

Setting incompatibility (automatic cooling/heating setting for model incapable of it and heating setting for cooling-only model)

Light block Check code Cause of fault

Operation

Synchronized blinking

Timer Read

Operation Timer

Synchronized blinking

Read

Alternate blinking

Operation Timer Read

– 58 –

8-4. Check Codes Displayed on Remote Control and SMMS-e Outdoor Unit (7-Segment

Display on I/F Board) and Locations to Be Checked

For other types of outdoor units, refer to their own service manuals.

Main remote control

Check code

E01 — —

Remote control

Indoor-remote control communication trouble (detected at remote control end)

Stop of corresponding unit

Communication between indoor P.C. board and remote control is disrupted.

• Check remote control inter-unit tie cable (A/B).

• Check for broken wire or connector bad contact.

• Check indoor power supply.

• Check for defect in indoor P.C. board.

• Check remote control address settings (when two remote controls are in use).

• Check remote control P.C. board.

E02 — —

Remote control

Remote control transmission trouble

Stop of corresponding unit

Signal cannot be transmitted from remote control to indoor unit.

• Check internal transmission circuit of remote control.

--- Replace remote control as necessary.

E03 — —

Indoor unit

Indoor-remote control communication trouble (detected at indoor end)

Stop of corresponding unit

There is no communication from remote control (including wireless) or network adaptor.

• Check remote control and network adaptor wiring.

E04 — —

Indoor unit

Indoor-outdoor communication circuit trouble (detected at indoor end)

Stop of corresponding unit

Indoor unit is not receiving signal from outdoor unit.

• Check order in which power was turned on for indoor and outdoor units.

• Check indoor address setting.

• Check indoor-outdoor tie cable.

• Check outdoor terminating resistor setting (SW30, Bit 2).

E09 — —

Remote control

Duplicated master remote control

Stop of corresponding unit

In two remote control configuration (including wireless), both controls are set up as master. (Header indoor unit is shut down with alarm, while follower indoor units continue operating.)

• Check remote control settings.

• Check remote control P.C. boards.

E10 — —

Indoor unit

Indoor interMCU communication trouble

Stop of corresponding unit

Communication cannot be established/maintained upon turning on of power or during communication.

• Check for defect in indoor P.C. board

E12 E12

01: Indoor-outdoor communication 02: Outdoor-outdoor communication

I/F Automatic

address starting trouble

All stop • Indoor automatic address setting

is started while automatic address setting for equipment in other refrigerant line is in progress.

• Outdoor automatic address setting is started while automatic address setting for indoor units is in progress.

• Perform automatic address setting again after disconnecting communication cable to that refrigerant line.

E15 E15 —

I/F Indoor unit not

found during automatic address setting

All stop Indoor unit cannot be

detected after indoor automatic address setting is started.

• Check connection of indooroutdoor communication line.

• Check for trouble in indoor power supply system.

•

Check for noise from other devices.

• Check for power failure.

• Check for defect in indoor P.C. board.

E06 E06

No. of indoor units from which signal is received normally

I/F Signal lack of

indoor unit

All stop Indoor unit initially

communicating normally fails to return signal for specified length of time.

• Check power supply to indoor unit. (Is power turned on?)

• Check connection of indooroutdoor communication cable.

• Check connection of communication connectors on indoor P.C. board.

• Check connection of communication connectors on outdoor P.C. board.

• Check for defect in indoor P.C. board.

• Check for defect in outdoor P.C. board (I/F).

E08 E08

Duplicated indoor address

Indoor unit I/F

Duplicated indoor address

All stop More than one indoor unit are

assigned same address.

• Check indoor addresses.

• Check for any change made to remote control connection (group/individual) since indoor address setting.

— E07 —

I/F Indoor-outdoor

communication circuit trouble (detected at outdoor end)

All stop Signal cannot be transmitted from

outdoor to indoor units for 30 seconds continuously.

• Check outdoor terminating resistor setting (SW30, Bit 2).

• Check connection of indooroutdoor communication circuit.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 59 –

Main remote control

Check code

E16 E16

00: Overloading 01-: No. of units connected

I/F Too many

indoor units connected

All stop • Combined capacity of indoor units

exceeds 135% of combined capacity of outdoor units.

Note:

If this code comes up after backup setting for outdoor unit failure is performed, perform “No overloading detected” setting.

<“No overloading detected” setting method> Turn on SW09/Bit 2 on I/F P.C. board of outdoor header unit.

• More than 64 indoor units are connected.

• Check capacities of indoor units connected.

• Check combined HP capacities of indoor units.

• Check HP capacity settings of outdoor units.

• Check No. of indoor units connected.

• Check for defect in outdoor P.C. board (I/F).

E18 — —

Indoor unit

Trouble in communication between indoor header and follower units

Stop of corresponding unit

Periodic communication between indoor header and follower units cannot be maintained.

• Check remote control wiring.

• Check indoor power supply wiring.

• Check P.C. boards of indoor units.

E19 E19

00: No header unit 02: Two or more header units

I/F Trouble in

number of outdoor header units

All stop • There are more than one outdoor

header units in one line.

• There is no outdoor header unit in one line.

Outdoor header unit is outdoor unit to which indooroutdoor tie cable (U1,U2) is connected.

• Check connection of indooroutdoor communication line.

• Check for defect in outdoor P.C. board (I/F).

E20 E20

01: Connection of outdoor unit from other line 02: Connection of indoor unit from other line

I/F Connection to

other line found during automatic address setting

All stop Equipment from other line is found

to have been connected when indoor automatic address setting is in progress.

Disconnect inter-line tie cable in accordance with automatic address setting method explained in “Address setting” section.

E26 E26

Address of outdoor unit from which signal is not received normally

I/F Signal lack of

outdoor unit

All stop Outdoor unit initially

communicating normally fails to return signal for specified length of time.

• Backup setting is being used for outdoor units.

• Check power supply to outdoor unit. (Is power turned on?)

• Check connection of tie cables between outdoor units for bad contact or broken wire.

• Check communication connectors on outdoor P.C. boards.

• Check for defect in outdoor P.C. board (I/F).

E28 E28

Detected outdoor unit No.

I/F Outdoor

follower unit trouble

All stop Outdoor header unit receives

trouble code from outdoor follower unit.

• Check check code displayed on outdoor follower unit.

<Convenient functions> If SW04 is pressed and held for at least 1 second while [E28] is displayed on the 7-segment display of outdoor header unit, the fan of the outdoor unit that has been shut down due to an trouble comes on. If SW04 and SW05 are pressed simultaneously, the fans of normal outdoor units come on. To stop the fan or fans, press SW05 on its own.

E23 E23 —

I/F Outdooroutdoor

communication transmission trouble

All stop Signal cannot be transmitted to

other outdoor units for at least 30 seconds continuously.

• Check power supply to outdoor units. (Is power turned on?)

• Check connection of tie cables between outdoor units for bad contact or broken wire.

• Check communication connectors on outdoor P.C. boards.

• Check for defect in outdoor P.C. board (I/F).

• Check termination resistance setting for communication between outdoor units.

E25 E25 —

I/F Duplicated

follower outdoor address

All stop There is duplication in outdoor

addresses set manually.

Note:

Do not set outdoor addresses manually.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 60 –

Main remote control

Check code

E31 E31

I/F IPDU

communication trouble

All stop Communication is disrupted

between IPDUs (P.C. boards) in inverter box.

• Check wiring and connectors involved in communication between IPDU-I/F P.C. board for bad contact or broken wire.

• Check for defect in outdoor P.C. board (I/F, A3-IPDU or Fan IPDU).

• Check for external noise.

Communication trouble between MCU and Sub MCU

All stop Communication between MCU and

Sub MCU stopped.

• Operation of power supply reset (OFF for 60 seconds or more)

•

Outdoor I/F PC board trouble check.

F02 — —

Indoor unit

Indoor TC2 sensor trouble

Stop of corresponding unit

Sensor resistance is infinity or zero (open/short circuit).

• Check connection of TC2 sensor connector and wiring.

• Check resistance characteristics of TC2 sensor.

• Check for defect in indoor P.C. board.

F03 — —

Indoor unit

Indoor TC1 sensor trouble

Stop of corresponding unit

Sensor resistance is infinity or zero (open/short circuit).

• Check connection of TC1 sensor connector and wiring.

• Check resistance characteristics of TC1 sensor.

• Check for defect in indoor P.C. board.

F04 F04 —

I/F TD1 sensor

trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TD1 sensor connector.

• Check resistance characteristics of TD1 sensor.

• Check for defect in outdoor P.C. board (I/F).

F05 F05 —

I/F TD2 sensor

trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TD2 sensor connector.

• Check resistance characteristics of TD2 sensor.

• Check for defect in outdoor P.C. board (I/F).

F06 F06

01: TE1 sensor trouble 02: TE2 sensor trouble

I/F TE1/TE2

sensor trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TE1/TE2 sensor connectors.

• Check resistance characteristics of TE1/TE2 sensors.

• Check for defect in outdoor P.C. board (I/F).

F07 F07

01: TL1 sensor trouble I/F TL1 sensor

trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TL1/TL2/TL3 sensor connector.

• Check resistance characteristics of TL1/TL2/TL3 sensor.

• Check for defect in outdoor P.C. board (I/F).

F08 F08 —

I/F TO sensor

trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TO sensor connector.

• Check resistance characteristics of TO sensor.

• Check for defect in outdoor P.C. board (I/F).

F10 — —

Indoor unit

Indoor TA sensor trouble

Stop of corresponding unit

Sensor resistance is infinity or zero (open/short circuit).

• Check connection of TA sensor connector and wiring.

• Check resistance characteristics of TA sensor.

• Check for defect in indoor P.C. board.

F09 F09

I/F01: TG1 sensor trouble

02: TG2 sensor trouble

TG1/TG2 All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TG1/TG2 sensor connectors.

• Check resistance characteristics of TG1/TG2 sensors.

• Check for defect in outdoor P.C. board (I/F).

F11 — —

Indoor unit

Indoor TF sensor trouble

Stop of corresponding unit

Sensor resistance is infinity or zero (open/short circuit).

• Check connection of TF sensor connector and wiring.

• Check resistance characteristics of TF sensor.

• Check for defect in indoor P.C. board.

F01 — —

Indoor unit

Indoor TCJ sensor trouble

Stop of corresponding unit

Sensor resistance is infinity or zero (open/short circuit).

• Check connection of TCJ sensor connector and wiring.

• Check resistance characteristics of TCJ sensor.

• Check for defect in indoor P.C. board.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

A3-IPDU

Circle (

): IPDU trouble

Fan-IPDU

01 02 03 08 09 0A 0B 10 11 12 13 18 19 1A 1B

O O

O O O O

O O O O O O O O

– 61 –

Main remote control

Check code

F13 F13

01: Compressor 1 side 02: Compressor 2 side

IPDU TH sensor

trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Defect in IPM built-in temperature sensor → Replace A3-IPDU P.C. board.

F15 F15 —

I/F Outdoor

temperature sensor wiring trouble (TE1, TL1)

All stop During compressor operation in

HEAT mode, TL1 continuously provides temperature reading higher than indicated by TL1 by at least specified margin for 3 minutes or more.

• Check installation of TE1 and TL1 sensors.

• Check resistance characteristics of TE1 and TL1 sensors.

• Check for outdoor P.C. board (I/F) trouble.

F16 F16 —

I/F Outdoor

pressure sensor wiring trouble (Pd, Ps)

All stop Readings of high-pressure Pd

sensor and lowpressure Ps sensor are switched. Output voltages of both sensors are zero.

• Check connection of highpressure Pd sensor connector.

• Check connection of lowpressure Ps sensor connector.

• Check for defect in pressure sensors Pd and Ps.

• Check for trouble in outdoor P.C. board (I/F).

• Check for deficiency in compressive output of compressor.

F23 F23 —

I/F Ps sensor

trouble

All stop Output voltage of Ps sensor is zero. • Check for connection trouble

involving Ps sensor and Pd sensor connectors.

• Check connection of Ps sensor connector.

• Check for defect in Ps sensor.

• Check for deficiency in compressive output of compressor.

• Check for defect in 4-way valve.

• Check for defect in outdoor P.C. board (I/F).

• Check for defect in SV4 circuit.

F24 F24 —

I/F Pd sensor

trouble

All stop Output voltage of Pd sensor is zero

(sensor open-circuited). Pd > 4.15MPa despite compressor having been turned off.

• Check connection of Pd sensor connector.

• Check for defect in Pd sensor.

• Check for defect in outdoor P.C. board (I/F).

F29 — —

Indoor unit

Other indoor trouble

Stop of corresponding unit

Indoor P.C. board does not operate normally.

• Check for defect in indoor P.C. board (faulty EEPROM)

F31 F31 —

I/F Outdoor

EEPROM trouble

All stop *1 Outdoor P.C. board (I/F) does not

operate normally.

• Check power supply voltage.

• Check power supply noise.

• Check for defect in outdoor P.C. board (I/F).

H01 H01

01: Compressor 1 side 02: Compressor 2 side

IPDU Compressor

breakdown

All stop Inverter current detection circuit

detects overcurrent and shuts system down.

• Check power supply voltage. (AC460V ± 10%).

• Check for defect in compressor.

• Check for possible cause of abnormal overloading.

• Check for defect in outdoor P.C. board (A3-IPDU).

H02 H02

01: Compressor 1 side 02: Compressor 2 side

IPDU Compressor

trouble (lockup) MG-CTT trouble

All stop Overcurrent is detected several

seconds after startup of inverter compressor.

• Check for defect in compressor.

• Check power supply voltage. (AC460V ± 10%).

• Check compressor system wiring, particularly for open phase.

• Check connection of connectors/ terminals on A3-IPDU P.C. board.

• Check conductivity of case heater. (Check for refrigerant problem inside compressor.)

• Check for defect in outdoor P.C. board (A3-IPDU).

• Check outdoor MG-CTT.

H03 H03

01: Compressor 1 side 02: Compressor 2 side

IPDU Current

detection circuit trouble

All stop Current flow of at least specified

magnitude is detected despite inverter compressor having been shut turned off.

• Check current detection circuit wiring.

• Check defect in outdoor P.C. board (A3-IPDU).

H05

*1 Total shutdown in case of header unit

Continued operation in case of follower unit

MG-CTT: Magnet contactor

H05 —

I/F TD1 sensor

miswiring (incomplete insertion)

All stop Discharge temperature of

compressor 1 (TD1) does not increase despite compressor being in operation.

• Check installation of TD1 sensor.

• Check connection of TD1 sensor connector and wiring.

• Check resistance characteristics of TD1 sensor.

• Check for defect in outdoor P.C. board (I/F).

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

F12 F12

01: TS1 sersor trouble 03: TS2 sersor trouble

I/F TS1/TS2

sensor trouble

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TS1/TS3 sensor connector.

• Check resistance characteristics of TS1/TS3 sensor.

• Check for defect.

– 62 –

Main remote control

Check code

H06 H06 —

I/F Activation of

low-pressure protection

All stop Low-pressure Ps sensor detects

operating pressure lower than

0.02MPa.

• Check service valves to confirm full opening (both gas and liquid sides).

• Check outdoor PMVs for clogging (PMV1).

• Check for defect in SV2 or SV4 circuits.

• Check for defect in lowpressure Ps sensor.

• Check indoor filter for clogging.

• Check valve opening status of indoor PMV.

• Check refrigerant piping for clogging.

• Check operation of outdoor fan (during heating).

• Check for insufficiency in refrigerant quantity.

H07 H07 —

I/F Low oil level

protection

All stop Operating compressor detects

continuous state of low oil level for about 2 hours.

• Check balance pipe service valve to confirm full opening.

• Check connection and installation of TK1, TK2, TK4, and TK5 sensors.

• Check resistance characteristics of TK1, TK2, TK4, and TK5 sensors.

• Check for gas or oil leak in same line.

• Check for refrigerant problem inside compressor casing.

• Check SV3A, SV3B, SV3C, SV3D valves for defect.

• Check oil return circuit of oil separator for clogging.

• Check oil equalizing circuit for clogging.

H15 H15 —

I/F TD2 sensor

miswiring (incomplete insertion)

All stop Discharge temperature of (TD2)

does not increase despite compressor 2 being in operation.

• Check installation of TD2 sensor.

• Check connection of TD2 sensor connector and wiring.

• Check resistance characteristics of TD2 sensor.

• Check for defect in outdoor P.C. board (I/F).

H08 H08

01: TK1 sensor trouble 02: TK2 sensor trouble 04: TK4 sensor trouble 05: TK5 sensor trouble

I/F Trouble in

temperature sensor for oil level detection

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TK1 sensor connector.

• Check resistance characteristics of TK1 sensor.

• Check for defect in outdoor P.C. board (I/F).

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TK2 sensor connector.

• Check resistance characteristics of TK2 sensor.

• Check for defect in outdoor P.C. board (I/F).

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TK4 sensor connector.

• Check resistance characteristics of TK4 sensor.

• Check for defect in outdoor P.C. board (I/F).

All stop Sensor resistance is infinity or zero

(open/short circuit).

• Check connection of TK5 sensor connector.

• Check resistance characteristics of TK5 sensor.

• Check for defect in outdoor P.C. board (I/F).

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 63 –

Main remote control

Check code

H16 H16

01: TK1 oil circuit trouble 02: TK2 oil circuit trouble 04: TK4 oil circuit trouble 05: TK5 oil circuit trouble

I/F Oil level

detection circuit trouble

All stop No temperature change is detected

by TK1 despite compressor 1 having been started.

• Check for disconnection of TK1 sensor.

• Check resistance characteristics of TK1 sensor.

• Check for connection trouble involving TK1, TK2, , TK4, and TK5 sensors

• Check for clogging in oil equalizing circuit capillary and faulty operation in check valve.

• Check for refrigerant entrapment inside compressor.

No temperature change is detected by TK2 despite compressor 2 having been started.

• Check for disconnection of TK2 sensor.

• Check resistance characteristics of TK2 sensor.

• Check for connection trouble involving TK1, TK2, , TK4, and TK5 sensors

• Check for clogging in oil equalizing circuit capillary and faulty operation in check valve.

• Check for refrigerant entrapment inside compressor.

No temperature change is detected by TK4 despite compressor having been started.

• Check for disconnection of TK4 sensor.

• Check resistance characteristics of TK4 sensor.

• Check for connection trouble involving TK1, TK2, , TK4, and TK5 sensors

• Check for clogging in oil equalizing circuit capillary and faulty operation in check valve.

• Check for refrigerant entrapment inside compressor.

No temperature change is detected by TK4 despite compressor having been started.

• Check for disconnection of TK5 sensor.

• Check resistance characteristics of TK5 sensor.

• Check for connection trouble involving TK1, TK2, , TK4, and TK5 sensors

• Check for clogging in oil equalizing circuit capillary and faulty operation in check valve.

• Check for refrigerant entrapment inside compressor.

L02 L02 —

Indoor unit

Outdoor units model disagreement trouble

Stop of corresponding unit

In case of different outdoor unit (Not corresponded to Air to Air Heat Exchanger type)

• Check outdoor unit model. (Check whether the outdoor unit corresponds to Air to Air Heat Exchanger type or not.)

L03 — —

Indoor unit

Duplicated indoor header unit

Stop of corresponding unit

There are more than one header units in group.

• Check indoor addresses.

• Check for any change made to remote control connection (group/individual) since indoor address setting.

L04 L04 —

I/F Duplicated

outdoor line address

All stop There is duplication in line address

setting for outdoor units belonging to different refrigerant piping systems.

• Check line addresses.

L05 — —

I/F Duplicated

priority indoor unit (as displayed on priority indoor unit)

All stop More than one indoor units have

been set up as priority indoor unit.

• Check display on priority indoor unit.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

L07 — —

Indoor unit

Connection of group control cable to standalone indoor unit

Stop of corresponding unit

There is at least one standalone indoor unit to which group control cable is connected.

• Check indoor addresses.

L08 L08 —

Indoor unit

Indoor group / addresses not set

Stop of corresponding unit

Address setting has not been performed for indoor units.

• Check indoor addresses.

Note:

This code is displayed when power is turned on for the first time after installation.

L06 L06

No. of priority indoor units

I/F Duplicated

priority indoor unit (as displayed on indoor unit other than priority indoor unit)

All stop More than one indoor units have

been set up as priority indoor unit.

• Check displays on priority indoor unit and outdoor unit.

– 64 –

Main remote control

Check code

L09 — —

Indoor unit

Indoor capacity not set

Stop of corresponding unit

Capacity setting has not been performed for indoor unit.

Set indoor capacity. (DN = 11)

L10 L10 —

I/F Outdoor

capacity not set

All stop Jumper wire provided on P.C.

board for servicing I/F P.C. board has not been removed as required for given model.

Check model setting of P.C. board for servicing outdoor I/F P.C. board.

L20 — —

Network adaptor Indoor unit

Duplicated central control address

All stop There is duplication in central

control address setting.

• Check central control addresses.

• Check network adaptor P.C. board .

L23 — —

I/F SW setting

mistake

All stop Outdoor P.C. board (I/F) does not

operate normally.

• Check switch setting of Bit 3 and 4 of SW17 in outdoor P.C. board (I/F).

L28 L28 —

I/F Too many

outdoor units connected

All stop There are more than three outdoor

units.

• Check No. of outdoor units connected (Only up to 3 units per system allowed).

• Check communication lines between outdoor units.

• Check for defect in outdoor P.C. board (I/F).

— L31 —

I/F Extended IC

trouble

Continued operation

There is part failure in P.C. board (I/F).

Check outdoor P.C. board (I/F).

P01 — —

Indoor unit

Indoor fan motor trouble

Stop of corresponding unit

• Check the lock of fan motor (AC fan).

• Check wiring.

L30 L30

Detected indoor address

Indoor unit

External interlock of indoor unit

Stop of corresponding unit

• Signal is present at external trouble input terminal (CN80) for 1 minute.

When external device is connected to CN80 connector:

1) Check for defect in external device.

2) Check for defect in indoor P.C. board.

When external device is not connected to CN80 connector:

1) Check for defect in indoor P.C. board.

L29 L29

I/F Trouble in No.

of IPDUs

All stop Insufficient number of IPDUs are

detected when power is turned on.

• Check model setting of P.C.

board for servicing outdoor I/F P.C. board.

• Check connection of UART

communication connector.

• Check A3-IPDU, fan IPDU, and

I/F P.C. board for defect.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

A3-IPDU

Circle (

): IPDU trouble

Fan-IPDU

01 02 03 08 09 0A 0B 10 11 12 13 18 19 1A 1B

O O

O O O O

O O O O O O O O

P03 P03 —

I/F Discharge

temperature TD1 trouble

All stop Discharge temperature (TD1)

exceeds 239°F (115°C).

• Check outdoor service valves

(gas side, liquid side) to confirm full opening.

• Check outdoor PMVs (PMV1, 3)

for clogging.

• Check resistance characteristics

of TD1 sensor.

• Check for insufficiency in

refrigerant quantity.

• Check for defect in 4-way valve.

• Check for leakage of SV4 circuit.

• Check SV4 circuit (wiring or

installation trouble in SV41 or SV42).

– 65 –

Main remote control

Check code

P04 P04

01: Compressor 1 side 02: Compressor 2 side

IPDU Activation of

high-pressure SW

All stop High-pressure SW is activated. • Check connection of highpressure

SW connector.

• Check for defect in Pd pressure sensor.

• Check outdoor service valves (gas side, liquid side) to confirm full opening.

• Check for defect in outdoor fan.

• Check for defect in outdoor fan motor.

• Check outdoor PMVs (PMV1, 4) for clogging.

• Check indoor/outdoor heat exchangers for clogging.

• Check for short-circuiting of outdoor suction/discharge air flows.

• Check SV2 circuit for clogging.

• Check for defect in outdoor P.C. board (I/F).

• Check for trouble in indoor fan system (possible cause of air flow reduction).

• Check opening status of indoor PMV.

• Check indoor-outdoor communication line for wiring trouble.

• Check for faulty operation of check valve in discharge pipe convergent section.

• Check gas balancing SV4 valve circuit.

• Check SV5 valve circuit.

• Check for refrigerant overcharging.

P13 P13 —

I/F Outdoor liquid

backflow detection trouble

All stop <During cooling operation>

When system is in cooling operation, high pressure is detected in follower unit that has been turned off. <During heating operation> When system is in heating operation, outdoor PMV 1 or 3 continuously registers opening of 300p or less while under superheat control.

• Check full-close operation of outdoor PMV (1, 3, 4).

• Check for defect in Pd or Ps sensor.

• Check gas balancing circuit (SV2) for clogging.

• Check balance pipe.

• Check SV3B circuit for clogging.

• Check defect in outdoor P.C. board (I/F).

• Check capillary of oil separator oil return circuit for clogging.

• Check for leakage of check valve in discharge pipe convergent section.

MG-CTT: Magnet contactor

P07 P07

01: Compressor 1 side 02: Compressor 2 side

IPDU I/F

Heat sink overheating trouble

All stop Temperature sensor built into IPM

(TH) is overheated.

• Check power supply voltage.

• Check outdoor fan system trouble.

• Check heat sink cooling duct for clogging.

• Check IPM and heat sink for thermal performance for faulty installation. (e.g. mounting screws and thermal conductivity)

• Check for defect in A3-IPDU. (faulty IPM built-in temperature sensor (TH))

P05 P05

00: I/F Detection of

open phase/ phase sequence

01: Compressor 1 side 02: Compressor 2 side

Inverter DC voltage (Vdc) trouble (compressor) MG-CTT trouble

All stop • Open phase is detected when

power is turned on.

• Inverter DC voltage is too high (overvoltage) or too low (undervoltage).

• Check for defect in outdoor P.C. board (I/F).

• Check wiring of outdoor power supply.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 66 –

Main remote control

Check code

P15 P15

01: TS condition I/F Gas

leakdetection (TS1 condition)

All stop Protective shutdown due to

sustained suction temperature at or above judgment criterion for at least 10 minutes is repeated four times or more. <TS trouble judgment criterion> In cooling operation: 140°F (60°C) In heating operation: 104°F (40°C)

• Check for insufficiency in refrigerant quantity.

• Check outdoor service valves (gas side, liquid side) to confirm full opening.

• Check PMVs (PMV1, 3) for clogging.

• Check resistance characteristics of TS1 sensor.

• Check for defect in 4-way valve.

• Check SV4 circuit for leakage

02: TD condition I/F Gas leak

detection (TD condition)

All stop Protective shutdown due to

sustained discharge temperature (TD1 or TD2) at or above 226.4°F (108°C) for at least 10 minutes is repeated four times or more.

• Check for insufficiency in refrigerant quantity.

• Check PMVs (PMV 1, 3) for clogging.

• Check resistance characteristics of TD1 and TD2 sensors.

• Check indoor filter for clogging.

• Check piping for clogging.

• Check SV4 circuit (for leakage or coil installation trouble).

P17 P17 —

I/F Discharge

temperature TD2 trouble

All stop Discharge temperature (TD2)

exceeds 239°F (115°C).

• Check outdoor service valves (gas side, liquid side) to confirm full opening.

•

Check outdoor PMVs (PMV1, 3, 4)

for clogging.

• Check resistance characteristics of TD2 sensor.

• Check for defect in 4-way valve.

• Check SV4 circuit for leakage.

• Check SV4 circuit (for wiring or installation trouble involving SV41 and SV42).

P19 P19

Detected outdoor unit No.

I/F 4-way valve

reversing trouble

All stop Abnormal refrigerating cycle data is

collected during heating operation.

• Check for defect in main body of 4-way valve.

• Check for coil defect in 4-way valve and loose connection of its connector.

• Check resistance characteristics of TS1 and TE1,TE2 sensors.

• Check output voltage characteristics of Pd and Ps pressure sensors.

• Check for wiring trouble involving TE1 and TL1 sensors.

P20 P20 —

I/F Activation of

high-pressure protection

All stop <During cooling operation>

Pd sensor detects pressure equal to or greater than 558.25 psi (3.85 MPa). <During heating operation> Pd sensor detects pressure equal to or greater than 522 psi (3.6 MPa).

• Check for defect in Pd pressure sensor.

• Check service valves (gas side, liquid side) to confirm full opening.

• Check for defect in outdoor fan.

• Check for defect in outdoor fan motor.

• Check outdoor PMV (PMV1, 3, 4) for clogging.

• Check indoor/outdoor heat exchangers for clogging.

• Check for short-circuiting of outdoor suction/ discharge air flows.

• Check SV2 circuit for clogging.

• Check for defect in outdoor P.C. board (I/F).

• Check for defect in indoor fan system (possible cause of air flow reduction).

• Check opening status of indoor PMV.

• Check indoor-outdoor communication line for wiring trouble.

• Check for faulty operation of check valve in discharge pipe convergent section.

• Check gas balancing SV4 valve circuit.

• Check SV5 valve circuit.

• Check for refrigerant overcharging.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 67 –

Main remote control

Check code

P22 P22

#0:Element short circuit IPDU Outdoor fan

IPDU trouble *Put in Fan IPDU No. in [#] mark

All stop (Sub code: #0)

Fan IPDU over current protection circuit. Flow of current equal to or greater than the specified value is detected during startup of the fan.

• Check fan motor.

• Check for defect in fan IPDU P.C. board.

#1:Position detection circuit trouble

All stop (Sub code: #1)

Fan IPDU position detection circuit. Position detection is not going on normally.

• Check fan motor.

• Check connection of fan motor

• connector.

• Check for defect in fan IPDU P.C.

• board.

#3:Motor lock trouble All stop (Sub code: #3)

Gusty wind, an obstruction, or another external factor. Speed estimation is not going on normally.

• Check fan motor.

• Check for defect in fan IPDU P.C.

• board.

#4:Motor current trouble All stop (Sub code: #4)

Fan IPDU over current protection circuit. Flow of current equal to or greater than the specified value is detected during operation of the fan.

• Check fan motor.

• Check connection of fan motor connector.

• Check for defect in fan IPDU P.C. board.

#C:TH sensor temperature trouble

All stop (Sub code: #C)

Higher temperature than the specified value is detected during operation of the fan.

• Check fan motor.

• Check for defect in fan IPDU P.C. board.

#D:TH sensor short circuit/release trouble

All stop (Sub code: #D)

The resistance value of the sensor is infinite or zero (open or short circuit).

• Check for defect in fan IPDU P.C. board.

#E:Vdc voltage trouble All stop (Sub code: #E)

Fan IPDU DC voltage protection circuit. The DC voltage higher or lower than the specified value is detected.

• Check power voltage of the main power supply.

• Check for defect in fan IPDU P.C. board.

• Check connection of fan IPDU P.C. board.

P31 — —

Indoor unit

Other indoor trouble (group follower unit trouble)

Stop of corresponding unit

There is trouble in other indoor unit in group, resulting in detection of E07/L07/L03/L08.

• Check indoor P.C. board.

C05 — —

TCC-LINK

TCC-LINK central control device transmission trouble

Continued operation

Central control device is unable to transmit signal.

• Check for defect in central control device.

• Check for defect in central control communication line.

• Check termination resistance setting.

C06 — —

TCC-LINK

TCC-LINK central control device reception trouble

Continued operation

Central control device is unable to transmit signal.

• Check for defect in central control device.

• Check for defect in central control communication line.

• Check terminator resistor setting.

• Check power supply for devices at other end of central control communication line.

• Check defect in P.C. boards of devices at other end of central control communication line.

C12 — —

Generalpurpose device I/F

Batch alarm for generalpurpose device control interface

Continued operation

Trouble signal is input to control interface for general-purpose devices.

• Check trouble input.

P30

TCC-LINK

Differs according to nature of alarm-causing trouble

Group control follower unit trouble

Continued operation

Trouble occurs in follower unit under group control. ([P30] is displayed on central remote control.)

• Check check code of unit that has generated alarm.

(L20 displayed.) Duplicated

central control address

Continued operation

There is duplication in central control addresses.

• Check address settings.

P26 P26

01: Compressor 1 side 02: Compressor 2 side

IPDU IPM shortcircuit

protection trouble

All stop Overcurrent is momentarily

detected during startup of compressor.

• Check connector connection and wiring on A3-IPDU P.C. board.

• Check for defect in compressor (layer shortcircuit).

• Check for defect in outdoor P.C. board (A3-IPDU).

P29 P29

01: Compressor 1 side 02: Compressor 2 side

IPDU Compressor

position detection circuit trouble

All stop Position detection is not going on

normally.

• Check wiring and connector connection.

• Check for compressor layer short-circuit.

• Check for defect in A3-IPDU P.C. board.

Outdoor 7-segment display

Check

code

Sub-code

Location

detection

Description System status

Trouble detection

condition(s)

Check items (locations)

– 68 –

8-5. Sensor Characteristics

Indoor Unit

Temperature sensor characteristics

32 (0)

41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30) 95 (35)

104 (40) 113 (45) 122 (50) 131 (55) 140 (60)

33.9

26.1

20.3

15.9

12.6

10.0

8.0

6.4

5.2

4.2

3.5

2.8

2.4

Temperature

[˚F (˚C)]

Resistance

[kΩ]

Resistance

[kΩ]

Temperature [˚F (˚C)]

140

(60)

(10)

(20)

(30)

104

(40)

122

(50)

185 (85) 194 (90) 203 (95)

212 (100)

99.9

74.1

55.6

42.2

32.8

25.4

19.8

15.6

12.4

10.0

8.1

6.5

5.3

4.4

3.6

3.0

2.5

2.1

1.8

1.5

1.3

1.1

1.0

0.8

0.7

115.2

84.2

62.3

46.6

35.2

26.9

20.7

16.1

12.6

10.0

8.0

6.4

5.2

4.2

3.5

2.8

2.4

2.0

1.6

1.4

1.2

Temperature

[˚F (˚C)]

-4 (-20)

5 (-15)

14 (-10)

23 (-5)

32 (0)

41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30) 95 (35)

104 (40)

113 (45) 122 (50) 131 (55) 140 (60) 149 (65) 158 (70) 167 (75) 176 (80)

Resistance

[kΩ

]

Temperature

[˚F (˚C)]

-4 (-20) 5 (-15)

14 (-10)

23 (-5)

32 (0)

41 (5) 50 (10) 59 (15) 68 (20) 77 (25) 86 (30) 95 (35)

104 (40)

113 (4 5) 122 (50) 131 (55) 140 (60) 149 (65) 158 (70) 167 (75) 176 (80)

Resistance

[kΩ

]

100

150

200

100

150

200

Resistance

]

(55 ˚F (10 ˚C)

or below)

Resistance

]

(55 ˚F (10 ˚C)

or above)

Temperature [˚F (˚C)]

Resistance

]

(55 ˚F (10 ˚C)

or below)

Resistance

[kΩ]

(55 ˚F (10 ˚C)

or below)

Temperature [˚F (˚C)]

Indoor TC1 sensor

Indoor TC2 and TCJ sensors

(10)68(20)86(30)

104 (40)

122 (50)

140

(60)

158 (70)

(-10)32(0)

176 (80)

194 (90)

212

(100)

-4

(-20)

-22

(-30)

(10)68(20)86(30)

104 (40)

122 (50)

140

(60)

158 (70)

(-10)32(0)

176 (80)

194 (90)

212

(100)

-4

(-20)

-22

(-30)

– 69 –

9. DETACHMENTS

9-1. Floor Console Exposed Type

No. Spare parts Work procedure Remarks



Electric parts assembly

1. Detachment

(1) Remove the suction grilles (2 pieces).

(No screw fixing)

(2) Remove the wire guard.

(M4 screw: 4 pieces)

(3) Remove the front panel.

(M4 screw: 2 pieces)

(4) Remove the discharge grille.

(M4 x 0.8" (20L): 2 pieces)

(5) Remove the switch box.

(M4 screw: 3 pieces)

(6) Take off the fan motor lead from the clamp, slide

the glass tube, and then remove the relay connector. (7) Take off the TA sensor from the clamp. (8) Take off the connectors of TC1, TC2, and TCJ

sensors from P.C. board.

CN100...TC1 (3P: Brown)

CN101...TC2 (2P: Black)

CN102...TCJ (2P: Red)

* Unlock the lock of the housing part, and then remove the connectors. (9) Remove the relay connector of the PMV lead. (10) Remove body of the electric parts assembly.

(M4 screw: 1)

2. Attachment

Following step 1 of



and (1) to (10), attach the parts

as original in the reverse procedure.

Electric parts assembly

Clamp Fan motor lead M4 screw

Clamp

TA sensor

Glass tube

Relay connector (Fan motor lead)

TC1, TC2, TCJ sensors

Relay connector (PMV lead)

WARNING

Be sure to turn off the power supply and the breaker and then start a work.

CAUTION

Be sure to put on the gloves at disassembling work; otherwise an injury will be caused by a part, etc.

– 70 –

No. Spare parts Work procedure Remarks



Refrigerant cycle assembly

1. Detachment

(1) Recover the refrigerant gas. (2) Take off the connecting pipe.

(Liquid pipe and gas pipe)

(3) Following to works 1 of



, and (1) to (10), detach

the parts.

(4) Take off the reinforcement plate.

(M4 screw: 2 pieces)

(5) Remove the upper panel )

(M4 screws: 4 pieces)

(6) Remove the vertical grille.

(M4 screws: 4 pieces)

(7) Remove the shield plate for heat exchanger (Front).

(M4 screws: 3 pieces)

(8) Remove the shield plate for heat exchanger (Right).

(M4 screws: 3 pieces)

(9) Take off the screws which fix the heat exchanger.

(M4 screws: 4 pieces)

(10) Remove the shield plate.

(M4 screws: 2 pieces)

(11) Slide the heat exchanger horizontally, release

liquid pipe, gas pipe from the drain pan, and then pull out it to the upper side.

2. Attachment

Following step 1 of



and those in (1) to (11), attach

the parts as original in the reverse procedure.



Drain pan assembly

1. Detachment

(1) Following step 1 of



and those in (1) to (11),

detach the parts.

(2) Remove the drain pan assembly.

2. Attachment

Following step 1 in



and those in (1) to (2),

attach

the parts as original in the reverse procedure.



PMV motor 1. Detachment

(1) Following step 1 of



and those in (3) to (8),

detach the parts.

(2) Peel bityl rubber which is adhered to the PMV body,

loosen the nut fixing the PMV motor with a double spanner, and then remove the PMV motor.

2. Attachment

Following step 1 of



and (1) to (2), attach the parts as original by the reverse procedure. * Control the tightening torque between PMV body and

PMV motor at 5.8 ± 0.7 ft•lbs (7.84 ± 0.98 N•m).

PMV motor

PMV body

– 71 –

No. Spare parts Work procedure Remarks



Fan assembly 1. Detachment

(1) Following step 1 of



, (1) to (3), (6 )and (7),

detach the parts.

(2) Take off the nut which fixes the fan assembly.

(M6 nut: 1 position)

(3) Draw out the fan assembly toward you.

(M4 screws: 4 pieces)

2. Attachment

Following step 1 of



, and (1) to (3), attach the parts as original in the reverse procedure.



Fan motor 1. Detachment

(1) Following step 1 of



and (1) to (3), detach the

parts.

(2) Take off the capacitor lead from the capacitor.

(M4 screws: 2 pieces)

(3)

Take off the screws at (right) and (left) of the fan case.

(M4 screws: 8 pieces, M4 x 0.47" (12L): 4 pieces) (4) Remove the fan case at the outside. (5) Loosen screws of the Silocco fan to remove the

Silocco fan. (6) Loosen the fixing screws of the fan motor, and then

remove the fan motor.

(M4 x 0.47" (12L): 2 pieces)

2. Attachment

Following step 1 of



and (1) to (5), attach the parts as original in the reverse procedure. * When attaching the Silocco fan, meet the fixing

screw for Silocco fan to the notch position on the shaft of the fan motor.

* After fixing the fan case, adjust the position of Silocco

fan at the center of the fan case from side of the discharge port so that the Silocco fan does not hit to the fan case.

* For the tightening torque of the screw fixing the

Silocco fan, control between 3.7 to 3.8 ft•lbs (5.0 to

5.2 N•m).

M4 screw

M6 nut

Motor band

Fan case

Discharge port

Silocco fan

Fan case

Screw fixing Silocco fan

Shaft

Silocco fan

Capacitor

Capacitor lead

Capacitor cover

Fan case (Right), (Left)

Silocco fan

Screw fixing Silocco fan

Fan motor

– 72 –

No. Spare parts Work procedure Remarks



Capacitor

1. Detachment

(1) Following step 1 of



and (1) to (2), detach the

parts.

(2) Remove the capacitor.

(M4 screw: 1 position)

2. Attachment

Following step 1 of



, and (1) to (3), attach the parts as original in the reverse procedure. * Be sure to connect the capacitor lead to the specified

position of the capacitor.

Capacitor installing leg

Capacitor

Connecting position of capacitor lead

Capacitor lead wire (Red)

Capacitor lead wire (White)

– 73 –

9-2. Floor Console Recessed Type

WARNING

Be sure to turn off the power supply and the breaker and then start a work.

CAUTION

Be sure to put on the gloves at disassembling work; otherwise an injury will be caused by a part etc.

No. Spare parts Work procedure Remarks



Electric parts assembly

1. Detachment

(1) Remove the side cover.

(M4 screws: 2 pieces)

(2) Remove conduit fixing plate.

(M4 screws: 2 pieces)

(3) Remove the side plate (Front).

(M4 screws: 4 pieces)

(4) Remove the side plate (Upper)

(M4 screws: 4 pieces)

(5) Remove the dashboard of lead.

(M4 screw: 1 piece)

(6) Remove the lead cover.

(No screw fixing)

(7) Remove connecting connectors (TC1, TC2, TCJ,

TA sensor, PMV lead) of the control P.C. board. Take of the lead wire from the clamp of the electric parts box. CN100...TC1 (3P; Brown) CN101...TC2 (2P; Black) CN102...TCJ (2P; Red) CN104...TA (2P; Orange) CN210...Fan motor (7P; White) CN104...PMV (6P; Blue)

* Remove the connectors by unlocking the locks of the

housing part.

(8) Take off the fixing screws of the electric parts

assembly fixing screws, slide the electric parts assembly toward upper side, and then remove it. (M4 screws: 2 pieces)

2. Attachment

Following to the works in 1 of



and (1) to (8), attach the parts as original in the reverse procedure. * Attach the lead cover by inserting the pawls of the

piping covers into the square holes of the electric parts assembly.

* Attach the lead dashboard also by inserting the

pawls of the lead covers into the square holes of the lead cover

Clamp

TC1, TC2, TCJ, TA sensors, PMV lead

Control P.C. board

Clamp

Fan motor lead

– 74 –

No. Spare parts Work procedure Remarks



Refrigerating cycle assembly

1. Detachment

(1) Recover the refrigerating gas. (2) Remove the connecting pipes.

(Liquid pipe and gas pipe)

(3) Following to works in 1 of



and (1) to (7), detach

the parts.

(4) Remove the filter.

(No screw fixing)

(5) Remove the wire guard.

(M4 screw AP007 to 009 : 3 pieces, and AP012 to 024 : 4 pieces)

(6) Remove the front panel (lower).

(M4 screw AP007 to 009 : 3 pieces, and AP012 to 024 : 4 pieces)

(7) Remove the front panel (upper).

(M4 screw AP007 to 009 : 3 pieces, and AP012 to 024 : 4 pieces)

(8) Remove the piping cover (Left).

(M4 screw: 2 pieces)

(9) Remove the sensor lead and the PMV lead from

the clamp.

(10) Remove the piping cover (Right).

(M4 screw: 3 pieces)

(11) Take off the screws which fix the drain pan, slide

it toward right, remove the drain pan from the side plate (Left), and then draw it toward you.

(12) Remove the dashboard of the heat exchanger.

(M4 screw: 4 pieces)

(13) Slide the heat exchanger toward right, remove

the end plate of the heat exchanger from the side plate (left), and then draw away the refrigerating cycle assembly toward you.

2. Attachment

Following to the works in 1 of



, and (1) to (13), attach the parts as original in the reverse procedure.

Sensor lead, PMV lead

Clamp

– 75 –

No. Spare parts Work procedure Remarks



PMV motor 1. Detachment

(1) Following to the works in 1 of



and (3) to (9),

detach the parts.

(2) Peel butyl rubber which is adhered to the PMV

body, loosen the nut fixing the PMV motor with a double spanner, and then remove the PMV motor.

2. Attachment

Following the works of 1 of



and (1) to (2), attach the parts as original by the reverse procedure. * Control the tightening torque between PMV body and

PMV motor at 5.8 ± 0.7 ft•lbs (7.84 ± 0.98 N•m).



Fan assembly 1. Detachment

(1) Following to the works in 1 of



of (1) and (3) to

(6), detach the parts. (2) Remove the fan motor lead from the clamp. (3) Slide the glass tube fixing the fan motor lead and

remove the connector. (4) Take off the fixing screws of the fan assembly and

draw the fan assembly toward you.

(M4 screw: 2 pieces)

2. Attachment

Following to the works in 1 of



, and (1) to (3),

attach the parts as original in the reverse procedure.

PMV motor

PMV body

Clamp

Fan motor lead

Sliding direction

Connector

Glass tube

– 76 –

No. Spare parts Work procedure Remarks



Fan motor [AP007 to 012]

1. Detachment

(1) Following to works of 1 of



and (1) to (3), detach

the parts.

(2)

Cut off the fixing band which fixes the fan motor lead.

(Two positions)

(3) Cut off the fixing band fixes the lead cover and the

fan motor lead, and then remove the lead cover from the fan assembly. (M4 screws: 4 pieces)

(4)

Take off the screws at (right) and (left) of the fan case.

(M4 screws: 4 pieces, M4 x 0.47" (12L): 2 pieces) (5) Remove the fan case at the outside. (6) Loosen screws of the Silocco fan to remove the

Silocco fan. (7) Loosen the fixing screws of the fan motor, and then

remove the fan motor.

(M4 x 0.47" (12L): 2 pieces)

Fan motor lead wire

Lead cover

Fixing band

Grand lead wire

Fixing band

Fan motor lead wire

Fixing band

– 77 –

No. Spare parts Work procedure Remarks



Fan motor (Continued)

2. Attachment

Following to works of 1 of



and (1) to (5), attach the parts as original in the reverse procedure. * When attaching the fan motor, be sure that the fan

motor does not hit the motor base reinforcement plate.

* When attaching the fan motor reinforcement plate,

be sure that the fan motor reinforcement plate is not caught in the motor band.

* Do wiring the fan motor lead to inside of the dash-

board as original, and then fix it to the dash-board with the fixing band.

* After attaching the lead cover, gather the fan motor

lead and the earth lead and then fix them to the lead cover with the fixing band.

* When attaching the fan motor reinforcement plate, be

careful to the screw hole position of the fan motor reinforcement plate.

* When attaching the Silocco fan, meet the fixing

screw for Silocco fan to the notch position on the shaft of the fan motor.

* After fixing the fan case, adjust the position of Silocco

fan at the center of the fan case from side of the discharge port so that the Silocco fan does not hit to the fan case.

* For the tightening torque of the screw fixing the

Silocco fan, control between 3.7 to 3.8 ft•lbs (5.0 to

5.2 N•m).

Fixing screw for Silocco fan Shaft

Silocco fan

Fan motor lead wire

Lead cover

Fixing band

Grand lead wire

Fixing band

Fan motor lead wire

Fixing band

– 78 –

No. Spare parts Work procedure Remarks

 Fan motor

(Continued)

[AP015 to 024]

1. Detachment

(1) Following to works of 1 of



and (1) to (3), detach

the parts.

(2)

Cut off the fixing band which fixes the fan motor lead. (Two positions)

(3) Cut off the fixing band fixes the lead cover and the

fan motor lead, and then remove the lead cover from the fan assembly. (M4 screws: 4 pieces)

(4) Remove the capacitor cover from the fan assembly

and remove the capacitor lead wire from the capacitor.

(5)

Take off the screws at (right) and (left) of the fan case.

(M4 screws: 8 pieces, M4 x 0.47" (12L): 4 pieces) (6) Remove the fan case at the outside. (7) Loosen screws of the Silocco fan to remove the

Silocco fan. (8) Loosen the fixing screws of the fan motor, and then

remove the fan motor.

(M4 x 0.47" (12L): 2 pieces)

Capacitor cover

Capacitor Capacitor lead

Lead cover

Fan motor lead wire

Fixing band

Grand lead wire

Fixing band Fan motor

lead wire

Fixing band

– 79 –

No. Spare parts Work procedure Remarks



Fan motor (Continued)

2. Attachment

Following to works of 1 of



and (1) to (8), attach the parts as original in the reverse procedure. * When attaching the fan motor reinforcement plate,

be sure that the fan motor reinforcement plate is not caught in the motor band.

* When attaching the fan motor reinforcement plate,

be careful to the direction of the fan motor reinforcement plate.

* When attaching the Silocco fan, meet the fixing screw

for Silocco fan to the notch position on the shaft of the fan motor.

* After fixing the fan case, adjust the position of Silocco

fan at the center of the fan case from side of the discharge port so that the Silocco fan does not hit to the fan case.

* For the tightening torque of the screw fixing the

Silocco fan, control between 3.7 to 3.8 ft•lbs (5.0 to

5.2 N•m).

Silocco fan fixing screw Shaft

Silocco fan

Lead cover

Fan motor lead wire

Fixing band

Grand lead wire

Fixing band Fan motor

lead wire

Fixing band

– 80 –

No. Spare parts Work procedure Remarks



Capacitor [AP007 to 012]

1. Detachment

(1)

Following to ‚1 of , and (1) to (3), detach the parts. (2) Remove the capacitor cover and remove the capacitor lead from the capacitor.

(M4 screw: 2 pieces) (3) Remove the capacitor.

(M4 screw: 1 position)

2. Attachment

Following to 1 of



, and (1) to (3), attach the parts as

original in the reverse procedure.

[AP015 to 024]

1. Detachment

(1)

Following to ‚1 of , and (1) to (2), detach the parts.

(M4 screw: 2 pieces) (2) Remove the capacitor.

(M4 screw: 1 position)

2. Attachment

Following to 1 of



, and (1) to (2), attach the parts as

original in the reverse procedure.

[AP007 to 024]

* Be sure to connect the capacitor lead to the specified

position of the capacitor.

Capacitor cover

Capacitor

Capacitor lead

Capacitor

Capacitor installing leg

Capacitor

Connecting position of capacitor lead

Capacitor lead wire (Red)

Capacitor lead wire (White)

– 81 –

10. P.C. BOARD EXCHANGE PROCEDURES

Indoor unit

10-1.Replacement of indoor P.C. boards

Points to note when replacing indoor P.C. board assembly

The electrically erasable programmable read-only memory (hereinafter EEPROM, IC10) mounted on an indoor P.C. board holds important setting data, including the type and capacity codes intrinsic to the model (set at the factory), as well as the line / indoor / group addresses, high ceiling adjustment setting and the like (during installation, either automatically or manually). Proceed with the replacement of an indoor P.C. board assembly in accordance with the procedure described below. After completion of the work, check the settings again, including the indoor unit No. and group header / follower designation, and confirm the integrity of the refrigerating cycle by conducting a test operation, etc.

Method 1

If it is possible to turn on the indoor unit and read the setting data from the P.C. board to be replaced via a wired remote control -

Reading EEPROM data: Procedure 1

Replacing P.C. board and turning on power: Procedure 2

Writing EEPROM data in new EEPROM: Procedure 3

Resetting power supply (applicable to all indoor units connected to remote control in case of group operation)

Part code Model type P.C. board type

431-6V-586 MML-AP

∗∗∗

BH2UL MCC-1403

431-6V-587 MML-AP

∗∗∗

H2UL MCC-1403

– 82 –

Method 2

If it is not possible to turn on the indoor unit or read the setting data from the P.C. board to be replaced via a wired remote control or operate the remote control due to the failure of its power supply circuit -

Replacing EEPROM (IC10) (For the location of this component and the method to replace it, see the “EEPROM location diagram” section.)

• The EEPROM on the P.C. board to be replaced needs to be removed and mounted on the service P.C. board.

Replacing P.C. board and turning on power: Procedure 2

Reading EEPROM data: Procedure 1

• If data cannot be read, go to Method 3.

Replacing EEPROM (IC10) again (For the location of this component and the method to replace it, see the “ EEPROM location diagram” section.)

• The old EEPROM, supplied with the P.C. board to be replaced and now mounted on the service P.C. board, needs to be replaced with the new EEPROM, supplied with the service P.C. board.

Replacing P.C. board and turning on power: Procedure 2

Writing EEPROM data in new EEPROM: Procedure 3

Resetting power supply (applicable to all indoor units connected to remote control in case of group operation)

Method 3

If it is not possible to read the setting data due to the failure of the EEPROM itself Replacing P.C. board and turning on power: Procedure 2

Writing EEPROM data on basis of information supplied by customer (e.g. high ceiling adjustment setting and optional connection setting): Procedure 3

Resetting power supply (applicable to all indoor units connected to remote control in case of group operation)

– 83 –

Procedure 1: reading setting data from EEPROM

(Read the setting data from EEPROM, including both the factory settings and any modifications made to them on site.)

1 Push the + + buttons simultaneously and hold for at least 4 seconds. (This number

corresponds to the same number shown on the Remote Control Operation Diagram.)

* In the case of group control, the unit No. displayed first is the indoor unit No. of the header unit.

At the same time, the CODE No. (DN code) 10 is displayed, and the fan of the selected indoor unit comes on, with the louver swinging, depending on the model.

2 Each time the

UNIT LOUVER

button (button of left side) is pushed, one of the indoor unit No. under

group control is displayed in turn.

* The fan of the selected indoor unit comes on, with the louvers swinging, depending on the model.

3 The button allows you to move the CODE No. (DN code) up / down by one place. 4 First, change the CODE No. (DN code) from 10 to 01. (To set filter sign lighting time)

Jot down the setting data displayed.

5 Change the CODE No. (DN code) using the button.

Again, jot down the setting data displayed.

6 Repeat step 5 until all the setting data has been jotted down. (See the CODE No. list.)

* CODE No. (DN code) go from 01 to FF with a few gaps along the way.

7 When finished, push the button to bring the system back to normal off state.

(It takes the system about 1 minute to become responsive to remote control operation.)

CODE No. (DN code) necessary at minimum

The type and capacity of the indoor unit are necessary for fan speed setting.

Remote control operation diagram

10 11 12 13 14

Contents

Type Indoor unit capacity Line address Indoor address Group address

<Fig. 1 RBC-AMT32UL> <Fig. 2 RBC-AMS41UL>

– 84 –

Procedure 2: replacing P.C. board

1 Replace the faulty P.C. board with a service P.C. board.

Be sure to replicate the old jumper setting (removal), and connector short-circuit setting (e.g. CN030) on the service P.C. board. (See the diagram at below.)

If a short-circuiting plug had been used on the replaced P.C. board, reuse it on the service P.C. board.

(MCC-1403)

CN041

CN030

Remove group control wiring from terminals A and B of indoor unit being serviced, and connect remote control wiring.

Indoor unit (one being serviced)

Service P.C. board

Indoor unit

P.C. board

Remote control

Group control wiring

Remove CN041 connectors of all other indoor units in same group.

Case 1

A B

Indoor unit

P.C. board

A B A B

Indoor unit (one being serviced)

Service P.C. board

Indoor unit

P.C. board

CN 041

Remote control

Group control wiring

Case 2

A B

Indoor unit

P.C. board

A B A B

2 It is necessary to establish a one-to-one correspondence between the indoor unit being

serviced and the remote control.

Turn on the indoor unit using one of the methods described below according to the system configuration.

(1)Single (stand-alone) operation

Turn on the indoor unit and proceed to Procedure 3.

(2) Group operation

A) If it is possible to selectively turn on the indoor unit being serviced

Turn on the indoor unit being serviced and proceed to Procedure 3.

B) If it is not possible to selectively turn on the indoor unit being serviced (Case 1)

a) Temporarily disconnect the group control wiring from terminals A and B of the indoor unit being

serviced.

b) Connect the remote control wiring to the terminals, turn on the indoor unit, and proceed to

Procedure 3.

* If this method cannot be used, proceed to the alternative method described below (Case 2).

C) If it is not possible to selectively turn on the indoor unit being serviced (Case 2)

a) Remove the CN041 connectors of all other indoor units in the same group.

b) Turn on the indoor unit and proceed to Procedure 3.

* Be sure to restore the temporarily removed group control wiring and CN041 connectors to their initial states

after Procedure 3 has been completed.

– 85 –

Procedure 3: writing setting data in EEPROM

(The EEPROM of the service P.C. board has been set to the factory default values.)

<Fig. 1 RBC-AMT32UL>

1 Push the + + buttons simultaneously and

hold for at least 4 seconds. (This number corresponds to the same number shown on the Remote Control Operation Diagram.)

(Under UNIT No., ALL is displayed.) At the same time, the CODE No. (DN code) 10 is displayed, and the fan of the indoor unit comes on depending on the model.

2 Push the left part of the

UNIT LOUVER

button (button of left side) to display the indoor unit No. one by one in the group control. Specify the indoor unit No. whose service PC board was replaced. (This operation is not available if the UNIT No. shows

ALLALL

ALL.)

3 The button allows you to moved the CODE No. (DN code) up / down by one place. 4 First, set the type and capacity codes of the indoor unit.

(Changing the type and capacity codes in EEPROM overwrites the factory default settings.)

(1) Set the CODE No. (DN code) to 10 (no change) (2) Use the button to select the type.

(For example, 0001 is for the 4-way cassette type.) - See the CODE No. list.

(3) Push the button. (The display should change from flashing to steady.) (4) Use the button to set the CODE No. (DN code) to 11. (5) Use the button to set the capacity code.

(For example, 0012 is for the 027 type.) - See the CODE No. list. (6) Push the button. (The display should change from flashing to steady.) (7) Push the button to bring the system back to normal off state.

5 Next, write any setting changes made on-site after installation, such as address settings, in

the EEPROM. Perform the tasks specified in step 1 again.

6 Use the button to set the CODE No. (DN code) to

0101

01 (To set filter sign lighting time)

7 Check the value displayed with the value jotted down in Procedure 1 and information

proved by the customer.

(1) If there is a discrepancy, change the setting in accordance with the jotted-down value, and push the

button.

(The display should change from flashing to steady.) (2) If there is no discrepancy, do nothing.

8 Use the button to change the CODE No. (DN code).

Again, check the value, and change the setting if necessary.

9 Repeat steps 6 and 7 until all the settings are checked. 10

When finished, push the button to bring the system back to normal off state.

In the case of group operation, turn the unit off, reconnect the indoor-indoor group control wiring and CN041 connectors, and turn on all the indoor units. (It takes the system about 1 minute to become responsive to remote control operation.)

* CODE No. (DN code) go from 01 to FF with a few gaps along the way.

If you realize you have wrongly corrected a certain setting after pushing the button, you can recover the initial value by pushing the button, provided that the CODE No. (DN code) is yet to be changed.

– 86 –

EEPROM location diagram

The EEPROM (IC10) is mounted on an IC socket. Use a pair of tweezers, etc. to remove it. When installing it, adjust its orientation as shown in the diagram below. During EEPROM removal / installation, take care not to bend IC leads.

P.C. board (MCC-1403) EEPROM (IC10)

When installing the EEPROM, align its notch with that of the IC socket.Notch

IC socket Notch

Notch

EEPROM

Table 2

CODE No. table (Please record the objective unit data at field)

Indoor unit capacity (CODE No. [11])

DN Item Memo At shipment

Filter sign lighting time

Dirty state of filter

Central control address

Heating suction temp shift

PRE-DEF indication selection

Cooling only

Type

Indoor unit capacity (See below table)

Refrigerant line address

Indoor unit address

Group address

Automatic restart from power cut

Option input selection (CN080)

Thermostat output selection (T10



)

Input selection (T10



)

Sensor selection

Timer set (Wired remote control)

0001: 150 hour

0000: Standard

0099: Unfixed

0000: No shift

0000: Standard

0000: Heat pump

Depending on model type

According to capacity type

0099: Unfixed

0001:Available

0002: External emergency input

0000: Thermostat ON

0000: Operation input

0000: Available

Setup data Model

0001*

0001

0002

0003

0004

0005

0006

0007

0008

Invalid

007 type

—

009 type

—

012 type

—

015 type

—

Setup data Model

0009

0010

0011

0012

0013

0014

0015

0017

—

018 type

021 type

024 type

027 type

030 type

—

036type

048 type

—

* Initial value of EEPROM installed on the supplied service P.C. board

– 87 –

11. EXPLODED VIEWS AND PARTS LIST

11-1. Floor Console Exposed Type

MML- AP0074H2UL, AP0094H2UL, AP0124H2UL, AP0154H2UL, AP0184H2UL, AP0244H2UL

– 88 –

Location

No.

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260

Part No.

43723020 43723019 43126119 43109394 43166026 43166013 43166014 43166029 43155175 43155179 43155171 4312C150 4312C151 4312C152 43146707 43146726 43146713 43120228 43120232 43180280 43101347 43119531

4314J536 4314J537 4314J538 4314J539

4314J540 43049776 43149351 43047688 43149352 43149353 43149354 43109395 43109240 43170201 43104220 431S8137 431S8299 43F19904 43F47609 43F47685 43F49697 4310A128 4310A130 43107215 43147195 43194029 43149355 43147649 43196087 43139154 43139155 43122104 43101359 43172256 4310A129 43149314 43104219 43147664

Description

CASE, FAN, LEFT CASE, FAN, RIGHT CASE, FAN, RIGHT GRILL,INLET,WHITE REMOTE CONTROLLER, SIMPLE, SX-U01EQ REMOTE CONTROLLER, SX-TA01UE REMOTE CONTROLLER, SX-TB01UE REMOTE CONTROLLER CAPACITOR, 2.5MFD,400V CAPACITOR, 1.5MFD,450V CAPACITOR, 2.0MFD, 450 V MOTOR, FAN, AF-200-45-4FU MOTOR, FAN, AF-200-70-4KU MOTOR, FAN, SWA-200U19A4A MOTOR, PMV, EDM-MD12TF-3 BODY, PMV, EFM-40YGTF VALVE, PMV, EDM-B25YGTF-3 FAN, MULTI BLADE FAN, MULTI BLADE AIR FILTER COVER, CONTROL PANEL, WHITE GUARD, FAN REFRIGERATION CYCLE ASSY REFRIGERATION CYCLE ASSY REFRIGERATION CYCLE ASSY REFRIGERATION CYCLE ASSY REFRIGERATION CYCLE ASSY SOCKET, 3/8, IN SOCKET, 1/4, IN NUT, FLARE, 1/2, IN NUT, FLARE, 5/8, IN SOCKET, 1/2, IN SOCKET, 5/8, IN GRILLE, WHITE GRILLE HOSE, DRAIN COVER WIRE LABEL, CAUTION LABEL, WARNING HOLDER, SENSOR (TS) BONNET, 3/8, IN NUT, FLARE, 1/4 IN BONNET, 1/4 IN PANEL, FRONT OUTLET HOLDER, SENSOR BONNET, 1/2 IN BONNET, 5/8 IN NUT, FLARE, 3/8 IN STRAINER BUSHING, GRILLE BAND, MOTOR, LEFT BAND, MOTOR, RIGHT BASE, MOTOR FRAME PAN ASSY, DRAIN CABINET, UPPER SHEET, PMV PLATE ASSY STRAINER

Q'ty/Set MML-AP

0074

H2UL

2 2

2 1 1 1 1

1 1

1 2

2 1 1 1

1 1

3 1 1 1 1 1 2 1 1 1 1 1 1

1 1 6 2 2 1 1 1 1 1 1 1

0094

H2UL

2 2

2 1 1 1 1

1 1

1 2

2 1 1 1

1 1

3 1 1 1 1 1 2 1 1 1 1 1 1

1 1 6 2 2 1 1 1 1 1 1 1

0124

H2UL

2 2

2 1 1 1 1

1 1

2 1 1

1 1

3 1 1 1 1 1 2 1 1 1 1 1 1

1 1 6 2 2 1 1 1 1 1 1 1

0154

H2UL

2 2

2 1 1 1 1

1 1

2 1 1

1 1

3 1 1 1 1 1 2 1 1 1 1 1 1 1

6 2 2 1 1 1 1 1 1 1

0184

H2UL

2 2 1 1 1 1 1

1 1

2 2 1 1

1 1

3 1 1 1 1 1 2

1 1 1 1

6 2 2 1 1 1 1 1 1 1

0244

H2UL

2 2 1 1 1 1 1

1 1

2 2 1 1

1 1

1 3 1 1 1 1 1 2

1 1 1

1 1

6 2 2 1 1 1 1 1 1 1

– 89 –

Location

No.

401 402 403 404 405 406 407 408

Part No.

43050425 43F50426 43150320 43158182 43160575 43160582 4316V587 4316V345

Description

SENSOR ASSY, SERVICE, TC (F6) : TC2, TCJ SENSOR, SERVICE, TA SENSOR ASSY, SERVICE, TG (F4) : TC1 TRANSFORMER, TT-12 TERMINAL BLOCK, 2P, 20A TERMINAL, 4P P. C. BOARD ASSY, MCC-1403 P. C. BOARD ASSEMBLY, MCC-1520

Q'ty/Set MML-AP

0074

H2UL

2 1 1 1 1 1 1 1

0094

H2UL

2 1 1 1 1 1 1 1

0124

H2UL

2 1 1 1 1 1 1 1

0154

H2UL

2 1 1 1 1 1 1 1

0184

H2UL

2 1 1 1 1 1 1 1

0244

H2UL

2 1 1 1 1 1 1 1

Electrical parts

– 90 –

11-2. Floor Console Recessed Type

MML-AP0074BH2UL, AP0094BH2UL, AP0124BH2UL

– 91 –

Location

No.

201 202 203 204 205 206 207 211 214 215 217 218 219 221 222 224 225 230 231 232 233 234 235 236 237 238 239 240 243 244 245 246 247 248 249 251 252

Part No.

43723020 43126119 43166026 43166013 43166014 43166029

4314J543 43155179 4312C153 43146707 43146713 43120232 43180294 43170206 43119532 43049776 43149351 43122046 43170197 43119534 43119535 431S8137 431S8299 43F19904 43F47609 43F47685 43F49697 43107215 43149355 43139154 43139155 43122104 43170207 43111311 43149314 43147724 4314Q043

Description

CASE, FAN, LEFT CASE, FAN, RIGHT REMOTE CONTROLLER, SIMPLE, SX-U01EQ REMOTE CONTROLLER, SX-TA01UE REMOTE CONTROLLER, SX-TB01UE REMOTE CONTROLLER REFRIGERATION CYCLE ASSY CAPACITOR, 1.5MFD,450V MOTOR, FAN, SWA-200U19A4B MOTOR, PMV, EDM-MD12TF-3 VALVE, PMV, EDM-B25YGTF-3 FAN, MULTI BLADE FILTER CATCH, DRAIN GUARD, WIRE SOCKET, 3/8 IN SOCKET, 1/4 IN PLATE-WIND HOSE ASSY PLATE ASSY, CONDUIT COVER ASSY LABEL, CAUTION LABEL, WARNING HOLDER, SENSOR (TS) BONNET NUT, FLARE, 1/4 IN BONNET HOLDER, SENSOR NUT, FLARE, 3/8 IN BAND, MOTOR, LEFT BAND, MOTOR, RIGHT BASE, MOTOR STRAINER HINS SHEET, PMV STRAINER STRAINER

Q'ty/Set MML-AP

AP0074

BH2UL

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 2 1 1 1 1 1 1

AP0094

BH2UL

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 2 1 1 1 1 1 1

AP0124

BH2UL

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 1 2 2 1 1 1 1 1 1

– 92 –

Location

No.

401 402 403 404 405 406 407 408

Part No.

43050425 43F50426 43150320 43158182 43160626 43160582 4316V586 4316V345

Description

SENSOR ASSY, SERVICE ,TC (F6) : TC2, TCJ SENS0R, SERVICE, TA SENSOR ASSY, SERVICE, TG (F4) : TC1 TRANSFORMER, TT-12 TERMINAL BLOCK, 2P, 20A TERMINAL, 4P PC BOARD ASSY, MCC-1403 P. C. BOARD ASSEMBLY, MCC-1520

Q'ty/Set MML-AP

AP0074

BH2UL

2 1 1 1 1 1 1 1

AP0094

BH2UL

2 1 1 1 1 1 1 1

AP0124

BH2UL

2 1 1 1 1 1 1 1

Electrical parts

– 93 –

MML-AP0154BH2UL, AP0184BH2UL, AP0244BH2UL

– 94 –

Location

No.

201 202 203 204 205 206 208 209 210 212 213 215 216 218 220 221 223 224 225 226 227 228 229 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250

Part No.

43723020 43126119 43166026 43166013 43166014 43166029

4314J541

4314J542 43155175 43155191 4312C151 43146707 43146726 43120232 43180295 43170206 43119533 43049776 43149351 43047688 43149352 43149353 43149354 43170197 43119534 43119535 431S8137 431S8299 43F19904 43F47609 43F47685 43F49697 43107215 43147195 43194029 43149355 43139154 43139155 43122104 43170207 43111311 43149314 43147664

Description

CASE, FAN, LEFT CASE, FAN, RIGHT REMOTE CONTROLLER, SIMPLE, SX-U01EQ REMOTE CONTROLLER, SX-TA01UE REMOTE CONTROLLER, SX-TB01UE REMOTE CONTROLLER REFRIGERATION CYCLE ASSY REFRIGERATION CYCLE ASSY CAPACITOR, 2.5MFD,400V CAPACITOR, 450V 1MF MOTOR, FAN, AF-200-70-4KU MOTOR, PMV, EDM-MD12TF-3 BODY, PMV, EFM-40YGTF FAN, MULTI BLADE FILTER CATCH, DRAIN GUARD, WIRE SOCKET, 3/8 IN SOCKET, 1/4 IN NUT, FLARE, 1/2 IN NUT, FLARE, 5/8 IN SOCKET, 1/2 IN SOCKET, 5/8 IN HOSE ASSY PLATE ASSY, CONDUIT COVER ASSY LABEL, CAUTION LABEL, WARNING HOLDER, SENSOR (TS) BONNET, 3/8 IN NUT, FLARE, 1/4 IN BONNET HOLDER, SENSOR BONNET, 1/2 IN BONNET, 5/8 IN NUT, FLARE, 3/8, IN BAND, MOTOR, LEFT BAND, MOTOR, RIGHT BASE, MOTOR STRAINER HINS SHEET, PMV STRAINER

Q'ty/Set MML-AP

AP0154

BH2UL

2 2 1 1 1 1 1

1 1 1 1 2 1 1 1

1 1

1 1 1 1 1 2 1 1 1 1 1

2 2 1 1 1 1 1

AP0184

BH2UL

2 2 1 1 1 1 1

1 1 1 1 2 1 1 1

1 1

1 1 1 1 1 2 1 1 1 1 1

2 2 1 1 1 1 1

AP0244

BH2UL

2 2 1 1 1 1

1 1

1 1 1 2 1 1 1 1

1 1 1 1 1 1 2 1 1 1 1

1 1 2 2 1 1 1 1 1

– 95 –

Electrical parts

Location

No.

401 402 403 404 405 406 407 408

Part No.

43050425 43F50426 43150320 43158182 43160626 43160582 4316V586 4316V345

Description

Q'ty/Set MML-AP

AP0154

BH2UL

2 1 1 1 1 1 1 1

AP0184

BH2UL

2 1 1 1 1 1 1 1

AP0244

BH2UL

2 1 1 1 1 1 1 1

WARNINGS ON REFRIGERANT LEAKAGE

For the amount of charge in this example:

The possible amount of leaked refrigerant gas in rooms A, B and C is 22 lbs (10kg). The possible amount of leaked refrigerant gas in rooms D, E and F is 33 lbs (15kg).

NOTE 2 :

The standards for minimum room volume are as follows.

1) No partition (shaded portion)

2) When there is an effective opening with the adjacent room for ventilation of leaking refrigerant gas (opening without a door, or an opening 0.15% or larger than the respective floor spaces at the top or bottom of the door).

3) If an indoor unit is installed in each partitioned room and the refrigerant piping is interconnected, the smallest room of course becomes the object.

But when a mechanical ventilation is installed interlocked with a gas leakage detector in the smallest room where the density limit is exceeded, the volume of the next smallest room becomes the object.

NOTE 3 :

The minimum indoor floor area compared with the amount of refrigerant is roughly as follows: (When the ceiling is 8.9 ft (2.7m ) high)

Check of Concentration Limit

The room in which the air conditioner is to be installed requires a design that in the event of refrigerant gas leaking out, its concentration will not exceed a set limit.

The refrigerant R410A which is used in the air conditioner is safe, without the toxicity or combustibility of ammonia, and is not restricted by laws to be imposed which protect the ozone layer. However, since it contains more than air, it poses the risk of suffocation if its concentration should rise excessively. Suffocation from leakage of R410A is almost non-existent. With the recent increase in the number of high concentration buildings, however, the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space, individual control, energy conservation by curtailing heat and carrying power etc. Most importantly, the multi air conditioner system is able to replenish a large amount of refrigerant compared with conventional individual air conditioners. If a single unit of the multi conditioner system is to be installed in a small room, select a suitable model and installation procedure so that if the refrigerant accidentally leaks out, its concentration does not reach the limit (and in the event of an emergency, measures can be made before injury can occur). In a room where the concentration may exceed the limit, create an opening with adjacent rooms, or install mechanical ventilation combined with a gas leak detection device. The concentration is as given below.

Total amount of refrigerant (lbs (kg))

Min. volume of the indoor unit installed room (ft³ (m³))

≤ Concentration limit (lbs/ft³ (kg/m³))

The concentration limit of R410A which is used in multi air conditioners is 0.019 lbs/ft³ (0.3kg/m³).

NOTE 1 :

If there are 2 or more refrigerating systems in a single refrigerating device, the amounts of refrigerant should be as charged in each independent device.

Important

Outdoor unit

Refrigerant piping

Indoor unit

Outdoor unit

Refrigerant piping

Indoor unit

Ver y small room

Small room

Medium room

Large room

Mechanical ventilation device - Gas leak detector

e.g., charged amount (22 lbs (10 kg))

Outdoor unit

e.g., charged amount (33 lbs (15 kg))

Indoor unit

Room A Room B Room C Room D Room E Room F

22 44 66

Min. indoor floor area

Total amount of refrigerant

lbs

Range below the density limit of

0.019 lbs/ft³ (0.3 kg/m³) (countermeasures not needed)

Range above the density limit of

0.019 lbs/ft³ (0.3 kg/m³) (countermeasures needed)

d²

TOSHIBA CARRIER CORPORATION

72-34 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8585, JAPAN

Revision record

First issue— —Mar., 2016

Revision 1

English was corrected. Page 3, 4, 5, 6, 10, 11, 12, 13,

14, 15, 19, 20, 21, 22, 23, 24, 32, 36, 37, 38, 40, 42, 43, 46, 47, 48, 50, 58, 69, 70, 71, 72

Jun., 2016

Revision 2

The contents change of Description of service parts

Jun., 2017Page 89, 92, 95

Toshiba MML-AP0074H2UL, MML-AP0094H2UL, MML-AP0124H2UL, MML-AP0154H2UL, MML-AP0184H2UL Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual