Toshiba MMD-AP0721HF2UL, MMD-AP0481HF2UL, MMD-AP0961HF2UL User Manual

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FILE No. A10-1603

Revision 1 :

Sep., 2016

Revision 2 :

Jun., 2017

SERVICE MANUAL

AIR-CONDITIONER

(MULTI TYPE)

MMD-AP0481HF2UL MMD-AP0721HF2UL MMD-AP0961HF2UL

PRINTED IN JAPAN, Mar., 2016, TOMO

CONTENTS

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

1. OUTLINE OF OUTSIDE AIR UNIT ................................................ 8

1-1. SMMS System Specifications to Connect Outside Air Unit ............................................. 9

2. SPECIFICATIONS........................................................................ 12

3. CONSTRUCTION VIEWS (EXTERNAL VIEWS).......................... 13

4. WIRING DIAGRAM ......................................................................15

5. PARTS RATING ...........................................................................17

6. FAN CHARACTERISTIC.............................................................. 18

7. REFRIGERATING CYCLE DIAGRAM ......................................... 22

8. CONTROL OUTLINE ................................................................... 23

9. APPLIED CONTROL AND FUNCTION ....................................... 28

9-1. Indoor Print Circuit Board .................................................................................................28

9-2. Functions at test run.......................................................................................................... 33

9-3. Method to Set Indoor Unit Function DN Code ................................................................. 35

9-4. Applied Control in Indoor Unit .......................................................................................... 38

10. TROUBLESHOOTING ...............................................................51

10-1. Overview ........................................................................................................................... 51

10-2. Troubleshooting Method.................................................................................................. 52

10-3. Troubleshooting Based on Information Displayed on Remote Control ...................... 58

10-4. Check Codes Displayed on Remote Control and SHRM-e Outdoor Unit (7-Segment

Display on I/F Board) and Locations to Be Checked .................................................... 62

10-5. Sensor Characteristics .................................................................................................... 72

11. OWNER’S MANUAL ..................................................................73

12. INSTALLATION MANUAL ......................................................... 82

13. DETACHMENTS ........................................................................ 99

14. P.C. BOARD REPLACING PROCEDURES ............................. 104

15. EXPLODED VIEWS AND PARTS LIST ................................... 109

– 2 –

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]

Indication

DANGER

WARNING

CAUTION

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.

Explanation

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

[Explanation of illustrated marks]

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.

[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.

DANGER

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.

Turn off breaker.

Execute discharge

between terminals.

Prohibition

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.

– 3 –

Check ground wires.

Prohibition of modification.

Use specified parts.

Do not bring a child

close to the equipment.

Insulating measures

No fire

WARNING

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.

Refrigerant

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

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

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.

Assembly/Cabling

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.

– 4 –

Insulator check

Ventilation

Be attentive to

electric shock

Compulsion

WARNING

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.

Check after repair

Check after reinstallation

Put on gloves

Cooling check

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.

CAUTION

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.

– 5 –

• 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.

– 6 –

4. Tools

1. Required Tools for R410A Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc.

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

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

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

3) Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

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

Tools whose specifications are changed for R410A and their interchangeability

No.

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



Used tool

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

air conditioner installation

R410A

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

(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

– 7 –

1. OUTLINE OF OUTSIDE AIR UNIT

• Type: Concealed Duct High Static Pressure type

Three models 4 ton, 6 ton and 8 ton are prepared.

• Connectable outdoor unit

SMMS-i series (MMY-MAP UL, MMY-MAP

• Corresponding system

SMMS-i can connect to MMD-AP0481HF2UL for using diversity 30% (cooling basis) or below.

Definition

The Outside Air Unit means an air control for taken-in outside air. Intake of the outside air often influences on the system so that the normal control of the air conditioner becomes difficult or gives a large load upon air control and cooling performance.

Therefore it is frequently adopted to handle the outside air to a certain condition before the outside air will enter in the main air conditioner.

This handling device is called a Outside Air Unit.

NOTE:

The Outside Air Unit is an air conditioner provided to handle the outside air load and is not to control the room temperature.

For correspondence to the load of the indoor air control, set an air conditioner separately.

6HT9P-UL) of Heat pump super modular multi type outdoor unit.

∗∗∗

4HT6UL, MMY-MAP

∗∗∗

4HT9UL), SMMS-e series (MMY-MAP

∗∗∗

6HT6P-

– 8 –

1-1. SMMS System Specifications to Connect Outside Air Unit

1-1-1. Combination conditions

• The Outside Air Unit is connectable to SMMS-i and SMMS-e.

• However this is not connectable to SHRM-i and SHRM-e.

• The total capacity of the indoor units and the Outside Air Units is restricted to 80% to 100% against the capacity of the outdoor units. (This restriction should be strictly kept for correct control of the refrigerant.)

• Up to two Outside Air Units can be connected on one line of the multi system. The allowable total capacity of the two Outside Air Units shall be 30% or less against the total capacity of the indoor units (including the Outside Air Unit).

Up to two Outside Air Units

CORRECT

80 to 100% to capacity of the Outdoor Units

• The Outside Air Unit is usually used together with the indoor units on one line of the multi system. The Outside Air Unit only cannot be connected.

occupy 30% or less against total capacity of indoor units

INCORRECT

• Keep the height difference between the Outside Air Units to 19.7" (0.5m) or less.

Connection which stretches over two floors is unavailable

CORRECT INCORRECT

Height difference:

19.7" (0.5m) or more

– 9 –

1-1-2. Use conditions

Changing the set temperature

1 Push the “TEMP. ” buttons of the wired remote control.

Push to increase the temperature, and to decrease the temperature. (The set temperature cannot be changed in the fan mode.)

Operation mode

Setting range Factory default

COOL

HEAT 77 °F

61 to 80 °F

64 °F

NOTE

When heating

The air conditioner may continue running in the fan mode for about 30 seconds after stopping heating.

Operation mode and function

COOL : Cools the outside air and sends it into the room HEAT : Heats the outside air and sends it into the room FAN : Sends the outside air as it is

The air conditioner with the Outside Air Unit controls temperature of the supply air so that it is close to the setup temperature of the remote control.

However temperature of the supply air may not be close to the setup temperature according to temperature of the outside air or the operation condition of the indoor units for air conditioning in one line.

REQUIREMENT

• The air conditioner with the Outside Air Unit cannot control the room temperature.

• For control of the room temperature, an indoor unit for air conditioning is required separately.

Use conditions

• In COOL mode, if temperature of the outside air is under the setup temp. +5.4 °F, FAN status is automatically made. When temperature of the outside air is under 66 °F, FAN status is also made regardless of the setup temperature.

• In HEAT mode, if temperature of the outside air is over the setup temp. -5.4 °F, FAN status is automatically made. When temperature of the outside air is over 59 °F, FAN status is also made regardless of the setup temperature.

• Case to use in SMMS-i

Outdoor Air Temperature °F

14 32 50 68 86 104 122

Setup temp.

-5.4°F

+5.4°F

CoolingFan

Automatic COOL operation starts

Fan

COOL mode

HEAT mode

41 109

23 109

Heating

Automatic HEAT operation starts

– 10 –

• Case to use in SMMS-e

Outdoor Air Temperature °F

14 32 50 68 86 104 122

Setup temp.

-5.4°F

+5.4°F

CoolingFan

Automatic COOL operation starts

Fan

COOL mode

HEAT mode

41 115

23 109

Heating

Automatic HEAT operation starts

REQUIREMENT

• In “COOL” or “FAN” mode, if temperature of the outside air is under 41 °F, the operation stop automatically in order to protect the equipment. In this case, continue the operation by selecting “HEAT” mode.

• In “HEAT” mode, if temperature of the outside air is under 23 °F, the operation stops automatically in order to protect the equipment. When operating the air conditioner with the outside air temp. under 23 °F (minimum 5 °F), set temp. of the outside air to be taken in to 23 °F or upper using a duct heater (locally procured). For details, consult the dealer which you purchased the air conditioner.

– 11 –

2. SPACIFICATIONS

Outside Air Unit

Model name MMD- AP0481HF2UL AP0721HF2UL AP0961HF2UL

Cooling capacity (Note1) kBtu/h 48.0 72.0 96.0 Heating capacity (Note1) kBtu/h 30.0 47.0 59.0

Power supply 230V (208/230V) 1phase

Electical characteristics

Outer dimension

Main unit weight lbs 212 349 Heat exchanger Finned tube Soundproof / Heat-insulationg material Non-flammable insulation Fan Centrifugal fan Standard air flow cfm 636 989 1237 Motor W 160 160x2 External static pressure

(factory default) Externalstatic

pressure

Air flow limit

Air filter Field supply Control Wired remote control

Connecting pipe

Sound pressure level

Operation range for SMMS-i

Operation range for SMMS-e

Running current A 1.58/1.56 3.00/2.88 3.32/3.17 Power consumption kW 0.31/0.34 0.56/0.58 0.64/0.66 Starting current A 3.90/3.20 7.70/6.30 8.50/6.90 Height In 19.5" Width In 35.4" 55" Depth In 49.8"

208V/230V In WG 0.55/0.86 0.74/1.00 0.41/0.85

208V(H / M / L) In WG 0.75/0.55/0.16 0.84/0.74/0.24 0.67/0.41 230V(H / M / L) In WG 1.06/0.86/0.50 1.08/1.00/0.65 1.01/0.85 Lower limit cfm 445 693 866 Upper limit cfm 700 1088 1360

Gas pipe In 5/8" 7/8" Liquid pipe In 3/8" 1/2" Drain pipe In 208V(H / M / L) dB(A) 44/43/36 47/46/40 47/45 230V(H / M / L) dB(A) 46/45/42 48/47/46 50/49 Cooling (Note 2) °F 41 - 109 Heating (Note 3) °F 23 - 109 Cooling (Note 2) °F 41 - 115 Heating (Note 3) °F 23 - 109

VP25

(Polyvinyl chloride tube : External Dia.1-1/4 internal Dia.1)

(H/L)

* The setting temperature is 60 - 80 °F. * Height difference between Outside Air Units must be within 1.97"(0.5 m). Note 1: Rated conditions Cooling : Outdoor air temperature 91 °F DB/82 °F WB setting temperature 64 °F

Heating : Outdoor air temperature 32 °F DB/26 °F WB setting temperature 77 °F

Note 2: * When supply air temperature is “setting temperature + 5.4 °F” or less, Outside Air Unit operates as

FAN mode.

Note 3: * When supply air temperature is “setting temperature - 5.4 °F” or over, Outside Air Unit operates as

FAN mode.

– 12 –

3. CONSTRUCTION VIEWS (EXTERNAL VIEWS)

3-1. MMD-AP0481HF2UL

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







1WVUKFG

1WVUKFG

 





 

5ETGYJQNGHQTFWEVOQWPVKPI

¹





&TCKPRKRGEQPPGEVKPIRQTV8

5ETGYJQNGHQT

FWEVOQWPVKPI

¹









#KTFKUEJCTIGRQTV

&KUEJCTIGVGORUGPUQT

 

6CRGTUETGYHQT4RKRGU





<XKGY

CPFTGOQVGEQPVTQNYKTKPI

¹*QNGHQTEQPVTQNYKTG

¹*QNGHQTRQYGTUWRRN[ECDNG



5GTXKEG



1XGT

5RCEGTGSWKTGFHQTKPUVCNNCVKQPCPFUGTXKEKPI

URCEG

9QTMGZCORNG

%CPXCUFWEV

%GKNKPI

– 13 –

3-2. MMD-AP0721HF2UL, AP0961HF2UL



1WVUKFG

1WVUKFG

Unit : in (mm)

#KTUWEVKQPRQTV



*CPIKPIDQNVOQWPVKPIRKVEJ





5ETGYJQNGHQTFWEVOQWPVKPI¹







#KTHNQY













 

'NGEVTKERCTVUDQZ

*QNGHQTJCPIKPIDQNV

¹













4GHTKIGTCPVRKRGEQPPGEVKPIRQTV

%JGEMRQTV

*CPIKPIDQNVOQWPVKPIRKVEJ

.KSWKFUKFG¹(NCTGF















  

)CUUKFG¹$TC\GF

4GHTKIGTCPVRKRGEQPPGEVKPIRQTV



1WVUKFG



 







 



5ETGYJQNGHQTFWEVOQWPVKPI

¹



&TCKPRKRGEQPPGEVKPIRQTV8

6CRGTUETGYHQT4RKRGU

5ETGYJQNGHQT

FWEVOQWPVKPI

¹

 

%CPXCUFWEV

(KNVGTEJCODGT

5GTXKEG

URCEG

1XGT 



%JGEMRQTV

1WVUKFG

CKTWPKV

1XGT







5GTXKEG

URCEG

5RCEGTGSWKTGFHQTKPUVCNNCVKQPCPFUGTXKEKPI

1XGT  

(KNVGT

9QTMGZCORNG

%CPXCUFWEV

1WVUKFG

CKTWPKV

1WVUKFGCKT

#KTKPVCMGFWEV

1XGT 



– 14 –

%JGEMRQTV

%GKNKPI

1WVUKFG











#KTFKUEJCTIGRQTV

&KUEJCTIGVGORUGPUQT

CPFTGOQVGEQPVTQNYKTKPI

¹*QNGHQTEQPVTQNYKTG

¹*QNGHQTRQYGTUWRRN[ECDNG

<XKGY

4. WIRING DIAGRAM

4-1. MMD-AP0481HF2UL

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䎥䎯䎮

䎲䎵䎱

䎥䎯䎸

䎩䎤䎱䎔

䎪䎵䎼

䎵䎨䎧

䎺䎫䎬

2QYGTޓ5WRRN[

䎖

䎥䎯䎮

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䎪䎵䎼

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

䎩䎰

䎪䎉䎼

䎵䎦

5ETGY

)TQWPF

䎩䎖䎩䎗

䎩䎔䎩䎕

䎤

䎗䎳

䎋䎺䎫䎬䎌

䎪䎵䎼

䎵䎨䎧

䎺䎫䎬

䎯䎕

䎯䎔

䎨䎻䎦䎷

䎳䎱䎯

䎷䎩

䎷䎦䎕䎷䎦䎔

䎷䎦䎭

䎷䎤

䎵䎨䎧

䎯䎰

䎦䎱䎓䎖䎖

䯴䎪䎵䎱䎌

䯴䎥䎯䎸䎌

䎦䎱䎓䎙䎛

䎩䎤䎱

䎦䎱䎓䎛䎖䯴䎺䎫䎬䯵

䎦䎱䎓䎛䎓

䯴䎪䎵䎱䎌

䎦䎱䎔䎓䎖

䯴䎥䎵䎺䎌

䎦䎱䎔䎓䎓

䯴䎥䎯䎮䎌

䎦䎱䎔䎓䎔

䯴䎵䎨䎧䎌

䎦䎱䎔䎓䎕

䯴䎼䎨䎯䎌

䎦䎱䎔䎓䎗

䯴䎵䎨䎧䎌

䎦䎱䎓䎖䎓

䎸䎯䎯

䎫䎰

䎵䎼䎓䎓䎚

䎳䎖䎓䎔

䎥䎯䎮

䏖䏓䏄䏕䏎䎃䏎䏌䏏䏏䏈䏕

䎗䎖䎩䎔

䎩䎶

䎩䎬䎯䎷䎨䎵

䯴䎺䎫䎬䎌

䎦䎱䎓䎚䎓

䯴䎥䎯䎮䎌

䎦䎱䎓䎛䎔

䯴䎪䎵䎱䎌

䯴䎵䎨䎧䎌

䎦䎱䎓䎚䎖

䎰䎦䎦䎐䎔䎗䎓䎖

䏉䏒䏕䎃䎬䏑䏇䏒䏒䏕䎃䎸䏑䏌䏗

䎦䏒䏑䏗䏕䏒䏏䎃䎳䎑䎦䎑䎃䎥䏒䏄䏕䏇䎃

䎵䎼䎓䎓䎔

䎵䎼䎓䎓䎕

䎦䎱䎖䎓䎗䯴䎪䎵䎼䎌

䎦䎱䎖䎓䎜

䎵䎼䎓䎓䎘

䯴䎼䎨䎯䯵

䎤䎦䎬䎱

䎵䎨䎧

䎵䎼䎓䎓䎙

䎵䎼䎓䎓䎗

䎺䎫䎬

䏖䏘䏓䏓䏏䏜

䎳䏒䏚䏈䏕

䎩䏘䏖䏈

䎷䎘䎑䎓䎤䫹䫹䫹䫹䫹䫹䎕䎘䎓䎹䱊

䎺䎫䎬

䯴䎥䎯䎸䎌

䎦䎱䎓䎛䎕

䎦䎱䎓䎙䎓䯴䎺䎫䎬䎌

䯴䎺䎫䎬䎌

䎦䎱䎓䎖䎕

䎦䎱䎓䎙䎔䯴䎼䎨䎯䎌

䯴䎺䎫䎬䎌

䎦䎱䎓䎚䎘

䏆䏌䏕䏆䏘䏌䏗

䎦䎱䎓䎚䎗䯴䎺䎫䎬䎌

䎦䎱䎓䎘䎓䯴䎺䎫䎬䎌

䎦䎱䎓䎗䎔䯴䎥䎯䎸䎌

䎦䎱䎓䎗䎓

䯴䎥䎯䎸䎌

䎦䎱䎓䎗䎗䯴䎥䎵䎺䎌

䎦䎱䎓䎙䎙䯴䎺䎫䎬䎌

䎦䎱䎓䎙䎚䯴䎥䎯䎮䎌

䎩䎤䎱䎲䎳䎷䎬䎲䎱

䎧䎵䎬䎹䎨

䎷䎔䎓

䎵䎦

䎲䎦

䎨䎰䎪

䎦䎱䎓䎕

䯴䎼䎨䎯䎌

䎥䎯䎮

䎥䎯䎸

䎦䎱䎓䎔

䯴䎺䎫䎬䎌

䎰䎦䎦䎐䎔䎘䎕䎓

䎶䏘䏅䎃䎳䎑䎦䎑䎥䏒䏄䏕䏇

䎯䏌䏑䏈䎃䎩䏌䏏䏗䏈䏕

䎺䎫䎬

䎵䎨䎧

䎷䎵䎔

䎵䏈䏐䏒䏗䏈

䎤䎥

䎵䏈䏐䏒䏗䏈

䎲䏘䏗䏇䏒䏒䏕

䎵䎨䎧

䎦䏒䏑䏗䏕䏒䏏䏏䏈䏕

䎥䏒䏄䏕䏇

䎦䏒䏑䏗䏕䏒䏏䏏䏈䏕

䎸䏑䏌䏗

䎺䎫䎬

%QPPGEVQT

䎗䎖䎩䎔

䎗䎙

䎺䎫䎬

䎵䎨䎧

䎩䎔

䎵䎨䎧

䎗䎖䎩䎔

䎘

䎷䎔䎓䎤䎏䎕䎘䎓䎹䱊

7PKV

+PFQQT

䎖

䎩䏄䏑䎃䎰䏒䏗䏈䏕

䎳䏄䏕䏗䏖䫹䎱䏄䏐䏈

䎵䏘䏑䏑䏌䏑䏊䎃䎦䏄䏓䏄䏆䏌䏗䏒䏕

䎵䎦

䎩䎰

䎶䏜䏐䏅䏒䏏

䎷䏕䏄䏑䏖䏉䏒䏕䏐䏈䏕

䎷䎵䎔

䎷䏈䏐䏓䎃䏖䏈䏑䏖䏒䏕

䎥䏏䏒䏚䎃䏗䏈䏐䏓䎑䎃䏖䏈䏑䏖䏒䏕

䎬䏑䏗䏄䏎䏈䎃䏄䏌䏕䎃䏗䏈䏐䏓䎑䎃䏖䏈䏑䏖䏒䏕

䎷䎤

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䎷䎩

䎵䎼䎓䎓䎘䱊䎓䎓䎚

䎷䎦䎔䎏䎷䎦䎕䎏䎷䎦䎭

䎳䏘䏏䏖䏈䎃䎰䏒䏗䏒䏕䎃䎹䏄䏏䏙䏈

䎩䏘䏖䏈䎃䏉䏒䏕䎃䎩䏄䏑䎃䎰䏒䏗䏒䏕

䎧䏕䏄䏌䏑䎃䎦䏒䏑䏗䏕䏒䏏䎃䎵䏈䏏䏄䏜

䎵䎼䎓䎓䎕

䎩䏄䏑䎃䎰䏒䏗䏒䏕䎃䎦䏒䏑䏗䏕䏒䏏䎃䎵䏈䏏䏄䏜

䎩䎔

䎳䎰䎹

䎗䎖䎩䎔

䰏䰛䰘䰛䰞

䰕䰐䰑䰚䰠䰕䰒䰕䰏䰍䰠䰕䰛䰚

䰞䰑䰐䰆䰞䰑䰐

䰥䰑䰘䰆䰥䰑䰘䰘䰛䰣

䰣䰔䰕䰆䰣䰔䰕䰠䰑

䰎䰘䰗䰆䰎䰘䰍䰏䰗

䰎䰘䰡䰆䰎䰘䰡䰑

䰓䰞䰥䰆䰓䰞䰍䰥

䰜䰚䰗䰆䰜䰕䰚䰗

䰛䰞䰚䰆䰛䰞䰍䰚䰓䰑

䰎䰞䰣䰆䰎䰞䰛䰣䰚

䰓䯳䰥䰆䰓䰞䰑䰑䰚䯳䰥䰑䰘䰘䰛䰣

– 15 –

140

$.7

YKTKPIFKCITCO

(CPOQVQTKPUKFG

$.-

(

/QVQTQXGTJGCVKPI

9*+

4'&

)4;

RTQVGEVKQPUYKVEJ

䎃䎃䎯䏈䏗䏗䏈䏕䎃䏄䏗䎃䏌䏑䏖䏌䏇䏈䎃䏌䏑䏇䏌䏆䏄䏗䏈䏖䎃䏗䏋䏈䎃䏗䏈䏕䏐䏌䏑䏄䏏䎃䏑䏘䏐䏅䏈䏕䎑䫹

䎔䎑䧍䎃䏌䏑䏇䏌䏆䏄䏗䏈䏖䎃䏗䏋䏈䎃䏗䏈䏕䏐䏌䏑䏄䏏䎃䏅䏏䏒䏆䏎䎑

䎃䎃䏑䏘䏐䏅䏈䏕䎃䏄䏖䎃䏉䏌䏊䏘䏕䏈䎃䏄䏑䏇䎃䏏䏈䏄䏇䎃䏚䏌䏕䏈䎊䏖䎃䏆䏒䏏䏒䏕䎃䏒䏉䎃䏉䏄䏑䎃䏐䏒䏗䏒䏕䎑

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4-2. MMD-AP0721HF2UL, AP0961HF2UL

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5. PARTS RATING

Parts name MMD-AP0481HF2UL

Fan motor STF200-160U4A

Running capacitor for fan motor 400V 6µF 400V 4µF

Transformer TT-12

TA sensor Lead wire length: 47.2 in (1200mm) Lead wire length: 32.2 in (818mm)

TF sensor Lead wire length: 98.4 in (2500mm)

TC1 sensor

TC2 sensor

TCJ sensor

Pulse motor EDM-MD12TF-3

Electronic control valve EDM-B60YGTF-1 EDM-BAOYGTF-1

Ø0.16 in (Ø4 mm) size, Lead wire length:

47.2 in (1200mm), Vinyl tube (Blue)

Ø0.24 in (Ø6 mm) size, Lead wire length:

47.2 in (1200mm), Vinyl tube (Black)

Ø0.24 in (Ø6 mm) size, Lead wire length:

47.2 in (1200mm), Vinyl tube (Red)

MMD-AP0721HF2UL, MMD-AP0961HF2UL

Ø0.16 in (Ø4 mm) size, Lead wire length:

78.7 in (2000mm), Vinyl tube (Blue)

Ø0.24 in (Ø6 mm) size, Lead wire length:

78.7 in (2000mm), Vinyl tube (Black)

Ø0.24 in (Ø6 mm) size, Lead wire length:

78.7 in (2000mm), Vinyl tube (Red)

– 17 –

6. FAN CHARACTERISTIC

䇭

<MMD-AP0481HF2UL>

Tap

ddiM

230V䇭

230V

636

tar wolf ria dradnatSerusserp citats lanretxE

Tap

V032A - mfc

cfm - A

V032scitsiretcarahc naF

Fan characteristics

zH 06 / V 802 :ecruos rewoPzH 06 / V 032 :ecruos rewoP

57.0hgiH60.1hgiH

55.0elddiM68.0el

61.0woL05.0woL

636

etar wolf ria dradnatSerusserp citats lanretxEe

)mfc()GW ni()mfc()GW ni(

– 18 –

<MMD-AP0721HF2UL>

䇭

230V䇭

230

atetar wolf ria dradnatSerusserp citats lanretxEpat

00.1elddiM

989 989

032A - mfc

cfm - A

032scitsiretcarahc naF

Fan characteristics

zH 06 / V 802 :ecruos rewoPzH 06 / V 032 :ecruos rewoP

48.0hgiH80.1hgiH

47.0elddiM

42.0woL56.0woL

etar wolf ria dradnatSerusserp citats lanretxEp

)mfc()GW ni()mfc()GW ni(

– 19 –

<MMD-AP0961HF2UL>

䇭

230V䇭

230

atetar wolf ria dradnatSerusserp citats lanretxEpat

0woL

1237 1237

032A - mfc

cfm - A

032scitsiretcarahc naF

Fan characteristics

zH 06 / V 802 :ecruos rewoPzH 06 / V 032 :ecruos rewoP

76.0hgiH10.1hgiH

14.0woL58.

etar wolf ria dradnatSerusserp citats lanretxEp

)mfc()GW ni()mfc()GW ni(

– 20 –

Wire connection change of fan motor

The motor wires for the fan have been connected to Change the wire connection if change of the external static pressure is required due to the duct resistance.

<MMD-AP048 type>

Fan motor

Black

Blue

Orange

F1 F2 F3 F4

Control

at shipment from the factory.

Electrical control box

P.C.

board

Orange (at shipment of factory)

4P terminal block

Lead wire for changing the external static pressure When changing the external static pressure is necessary, change connection of this lead wire.

2P terminal block

<MMD-AP072 type, AP096 type>

Electrical control box

Fan motor

Blue

F1 F2 F3 F4 F1 F2 F3 F4

Orange (at shipment of factory)

Black

Orange

Fan motor

Blue

Orange (at shipment of factory)

Control

P.C.

Black

Orange

2P terminal block

Lead wire for changing the external static pressure When changing the external static pressure is necessary, change connection of this lead wire.

board

4P terminal block

REQUIREMENT

When the external static pressure was changed, enter the changed static pressure value in the identification plate of the unit.

<MMD-AP048, AP072 type>

Terminal block No. Fan motor wiring Remarks

F1 (Low static pressure tap) Blue —

F2 (Middle static pressure tap) Orange At shipment from factory

F3 (High static pressure tap) Black —

<MMD-AP096 type>

Terminal block No. Fan motor wiring Remarks

F1 (-) Blue Not used.

F2 (Low static pressure tap) Orange At shipment from factory

F3 (High static pressure tap) Black —

– 21 –

7. REFRIGERATING CYCLE DIAGRAM

Gas sideLiquid side

Sensor (TF)

Strainer

Pulse Motor

Valve (PMV)

Sensor

(TC2)

Capillary tube

Functional part name

Pulse motor valve PMV

Air heat exchanger

at indoor side

Sensor

(TCJ)

Sensor

(TA)

Fan

Fan motor

Function outline

(Connector CN082 (6P): Blue)

1) Super heat control function in cooling operation

2) Subcool control function in heating operation

3) Cooling refrigerant oil recovery function

4) Heating refrigerant oil recovery function

Sensor

(TC1)

1. TA

2. TC1

Temperature sensor 3. TC2

4. TCJ

5. TF

(Connector CN104 (2P): Yellow)

1) For detection of outdoor suction temperature

(Connector CN100 (3P): Brown)

1) For super heat control of PMV in cooling operation

(Connector CN101 (2P): Black)

1) For subcool control of PMV in heating operation

(Connector CN102 (2P): Red)

1) For super heat control of PMV in cooling operation

(Connector CN103 (2P): Green)

1) For detection of discharge temperature

– 22 –

8. CONTROL OUTLINE

No.

When power supply is reset

Operation selection

Item

Outline of specifications

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

distinguished, and 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.

Command from

remote control

STOP

FAN

COOL

HEAT

* DRY or AUTO mode cannot be selected.

Outside Air Unit stops.

Fan operation

Cooling operation

Heating operation

Control outline

Remarks

Remote

control setup temperature

Capacity

control

PMV control

1) Adjustment range

Adjustment range



• In cooling or heating operation: 61 to 81 ˚F [ 16 to 27 ˚C ]

At shipment from factory:



• In cooling operation: 64 ˚F [ 18 ˚C ]

• In heating operation: 77 ˚F [ 25 ˚C ]

1) Differed from other indoor air conditioners, the Outside Air Unit usually operates with the maximum capacity.

1) Outside Air Unit controls PMV using the corrected value of each sensor according to the operation mode.

COOL



• SH control is performed by correcting indoor coil temp (TC1) and inlet air temp. from outside (TA).

HEAT



• UC control is performed by correcting indoor coil temp (TC2, TCJ) and inlet air temp. from outside (TA).

2) The value displayed by monitor function of the remote control switch becomes the corrected sensor data.

(See Monitor function of the remote control switch.)

Data to be corrected: Inlet air temp. from outside (TA), Indoor coil temp (TCJ, TC2, TC1)

– 23 –

No.

23 ˚F [ –5 ˚C]

TS –5.4 ˚F [–3 ˚C]

41 ˚F [5 ˚C]

TS +5.4 ˚F [3 ˚C] 109 ˚F [43 ˚C]

23 ˚F [ –5 ˚C]

TS –5.4 ˚F [ –3 ˚C] 109 ˚F [43 ˚C]

41 ˚F [5 ˚C]

TS +5.4 ˚F [3 ˚C] 115 ˚F [46 ˚C]

Fan control

Forced thermostat OFF

Item

Outline of specifications

1) On the Outside Air Unit, HH tap only isprovided.

2) For 1 minute after operation start, the forced fan OFF control is invalid.

3) There is no cool air discharge preventive control.

4) When refrigerant is recovered while cooling or fan operation is selected, and when cooling oil is recovered while heating operation is selected, the fan continues operation.

However the priority is given to forced fan OFF control

1) The thermostat is forcedly off by outdoor suction temperature (TA).

• COOL: At TA < 66 ˚F [ 19 ˚C ]

•

HEAT: At TA > 59 ˚F [ 15 ˚C ] or TA < 23 ˚F [ – 5 ˚C ]

2) The thermostat is forcedly off by outdoor suction temperature (TA) and remote control setting temperature (TS).

• COOL: At TA < TS + 5.4 ˚F [ + 3 ˚C ]

• HEAT: At TA > TS – 5.4 ˚F [ – 3 ˚C ]

Remarks

Forced fan OFF

1) The thermostat is forcedly off by outdoor suction temperature (TA).

• COOL/FAN: At TA < 41 ˚F [ 5 ˚C ]

• HEAT: At TA < 23 ˚F [ – 5 ˚C ]

2) After fan-OFF status continued for 60 minutes, turn on the fan for 1 minute.

The forced fan-OFF status continues or released by outdoor suction temperature (TA) in this time.

• COOL/FAN: At TA ≥ 41 ˚F [ 5 ˚C ]

• HEAT: At TA ≥ 23 ˚F [ – 5 ˚C ]

3) Other forced fan OFF release conditions

• Operation stop

• Operation mode exchange

•T

est run mode

Case to use in SMMS-i

Operation

mode

COOL

HEAT

FAN

[˚C]

˚F

[–10]

23 ˚F [ –5 ˚C] TS –5.4 ˚F [–3 ˚C]

[0] 32

41 ˚F [5 ˚C] TS +5.4 ˚F [3 ˚C] 109 ˚F [43 ˚C]

[10]

Outside temp.

[20]

FAN

Case to use in SMMS-e

Operation

mode

COOL

HEAT

FAN

[˚C]

˚F

[–10]

23 ˚F [ –5 ˚C] TS –5.4 ˚F [ –3 ˚C] 109 ˚F [43 ˚C]

[0] 32

41 ˚F [5 ˚C] TS +5.4 ˚F [3 ˚C] 115 ˚F [46 ˚C]

[10]

Outside temp.

[20]

FAN

Operation ready display

[30]

COOLFAN

FANHEAT

[30]

COOLFAN

FANHEAT

[40] 104

[50] 122

– 24 –

No.

Freeze preventive control (Low temperature release)

Item

Outline of specifications

1) The cooling operation is performed as follows based on the detected temperature of TC1 sensor, TC2 sensor and TCJ sensor.

• When [J] zone is detected for 5 minutes, thermostat is

forced to turn off.

• In [K] zone, timer counting pauses and is held.

• When [J] zone is detected, timer is cleared and returns

to normal operation.

• If thermostat is forcedly off by continuation of [J] zone,

indoor fan only operates until zone changes to [I] zone. When the following conditions are satisfied, control

function resets.

TC1 > 54 ˚F [ 12 ˚C ] and TC2 > 54 ˚F [ 12 ˚C ] and



TCJ > 54 ˚F [ 12 ˚C ] 20 minutes passed after stop



F˚ [ ˚C ]

Remarks

TC1

50 ˚F [ 10 ˚C ] (41 ˚F [ 5 ˚C ])

32 ˚F [ 0 ˚C ]

TC2, TCJ

14 ˚F [ –10 ˚C ]

7 ˚F [ –14 ˚C ]

( ) value:

When power supply is turned on, if the value is under this temperature, thermostat is forcedly off.

2) The cooling operation is performed as follows based on the detected temperature of TC2 sensor and TCJ sensor.

When [M] zone is detected for 45 minutes, thermostat

is forced to turn off. In [N] zone, timer counting pauses and is held. When shifting to [M] zone again, timer counting

restarts and continues. When [L] zone is detected, timer is cleared and

operation returns to normal operation.

F˚ [ ˚C ]

TC2, TCJ

41 ˚F [ 5 ˚C ]

28 ˚F [ –2 ˚C ]

TC1 > 54 ˚F [ 12 ˚C ] and TC2 > 54 ˚F [ 12 ˚C ] and



TCJ > 54 ˚F [ 12 ˚C ] 20 minutes passed after stop



– 25 –

No.

Cooling oil (Refrigerant) recovery control

Heating refrigerant (oil) recovery control

Short intermittent operation compensation control

Remained heat elimination

Item

Outline of specifications

When the indoor air conditioner which stops, in which thermostat is off, or which operates [FAN] performs the following control by receiving the cooling oil (refrigerant) recovery signal from the outdoor unit.

Opens PMV of the indoor air conditioner with certain



opening angle.

When the indoor air conditioner which stops, in which thermostat is off, or which operates [FAN] performs the following control by receiving the heating refrigerant (oil) recovery signal from the outdoor unit.

Opens PMV of the indoor air conditioner with certain



opening angle. Detects temperature of TC2 and closes PMV.



1) For 5 minutes after start of operation, the operation continues forcedly even if entering in thermostat OFF condition.

(2) However cooling/heating selection, operation ready and

protective control are given with priority, and thermostat is turned off.

1) If stopped from [HEAT] operation, the indoor fan operates for approx. 30 seconds.

Remarks

• Recovery operation is usually performed every 2 hours.

• Recovery operation is usually performed every 1 hour.

Filter sign display

15 [Operation stand-by]

[Heating stand-by] display

1) Estimates operation time of the indoor fan, sends the filter exchange signal to remote control when the specified time (2500H) passed and then displays it on LCD.

2) Clears the estimate timer when received filter reset signal from remote control. In this time, if the specified time has passed, resets the measured time and erases the LCD display.

<Ready stand-by>: displa displayed on the remote control.

1) When the following check codes are indicated.

• There is an indoor air conditioner which detected indoor overflow [P10].

• There is an indoor air conditioner which detected interlock warning [L30].

2) During forced thermo OFF.

• [COOL] operation is unavailable because other indoor air conditioner operates in [HEAT] mode.

• COOL priority setting (Outdoor I/F P.C. board SW11-bit1 is ON) is made, and other indoor air conditioner operates in [COOL/DRY] mode.

Therefore [HEAT] operation is unavailable.

3) When fan stops by forced fan OFF control.

4) The above indoor air conditioners unavailable to operate enter in [Standby] status with thermo-OFF.

•

[Operation stand-by] display

<HEAT stand-by>: displayed on the remote control.

1) Defrosting

• Indoor fan stops because unit is under defrost

operation.

– 26 –

• [Heating stand-by] display

No. Item Outline of specifications

Remarks

Central control

mode selection

1) The remote control at indoor air conditioner side becomes able to select the operable contents ofthe unit by setup at the central control side.

2) Setup contents

• In case of TCC-LINK central control

Operation from

TCC-LINK central

control

Single

[Central 1]

[Central 2]

[Central 3]

[Central 4]

(O : Operation available, × : Operation unavailable)

START/STOP Operation Timer Temp Air speed Air direction

setting selection setting setting setting setting

× ×

× × ×

Operation on RBC-ATM32UL

× ×

—

* For the Outside Air Unit, setting functions for air speed and air direction are not provided.

In central control mode,

[Central control] display (Lights up)

Display flashes when

item which operation is prohibited was changed from remote control.

RBC-AMT32UL

—

[Central control]

display

– 27 –

9. APPLIED CONTROL AND FUNCTION

9-1. Indoor Control Block Diagram

9-1-1. When Main (Simple) Wired Remote Control Connected

unit

Power

source

Outdoor

A BAB

#2 #3

circuit

Power

Key switch

Function setting

CPU

supply

DC5V

Remote control

LED

LCD

Display

Main (Simple) wired remote control (up to 2 units)

Display

EEPROM

communication circuit

EEPROM

circuit

control

Remote

communication

DC20V

DC12V

TA sensor

TC1 sensor

DC5V

TC2 sensor

CPU

H8/3039

Sameas left Sameas left

TCJ sensor

Driver

BUS

In operation

External output

U1 U2 U1 U2

circuit

communication

synchronization

signal input circuit

Alarm

HEAT

COOL

Getting ready

Thermostat ON

Fan motor

FAN

relay circuit

unit

Outdoor

Power

source

Indoor/outdoor communication

unit

Outdoor

U1 U2

Power source

208/230-1-60

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

Indoor unit

– 28 –

PMV

Power supply circuit

fan

Indoor

Transformer

motor

9-1-2. When Wireless Remote Control Kit Connected

Up to 8 units can be

connected.

Power

source

unit

Outdoor

#2 #3

Sensor P. C. board

Wireless remote control kit

Remote control

communication

circuit

EEPROM

circuit

control

Remote

AB AB AB

communication

Sameas left Sameas left

Display section

Sensor circuit

TA sensor

TC2 sensor

TC1 sensor

CPU

H8/3039

TCJ sensor

Driver

U1 U2 U1 U2

BUS

circuit

communication

synchronization

signal input circuit

unit

Outdoor

Power

source

Indoor/outdoor communication

unit

Outdoor

U1 U2

208/230-1-60

Power source

Indoor unit

C. board (MCC-1403)

DC5V

DC20V

DC12V

Indoor control P.

Power supply circuit

PMV

– 29 –

In operation

External

output

Alarm

COOL

Thermostat ON

Getting ready

Indoor

FAN

HEAT

Fan motor

control circuit

fan

motor

Transformer

9-1-3. When Both Wired (Simple) Remote Control and

Wireless Remote Control Kit Connected

unit

Power

source

Outdoor

#2 #3

Wireless remote control kit

Remote control

EEPROM

Remote

AB AB AB

Key switch

Function setting

CPU

DC5V

circuit

Power

supply

Remote control

LCD

Display

LED

Display

EEPROM

communication circuit

Main (Simple) wired remote control (up to 2 units)

communication

circuit

control

communication

Sameas left Sameas left

Display section

Sensor circuit

TA sensor

TC2 sensor

TC1 sensor

CPU

H8/3039

TCJ sensor

Driver

External

output

BUS

circuit

communication

synchronization

signal input circuit

Alarm

In operation

Thermostat ON

Getting ready

U1 U2 U1 U2

HEAT

COOL

unit

Outdoor

Power

source

Indoor/outdoor communication

unit

FAN

Outdoor

U1 U2

208/230-1-60

Power source

Indoor unit

C. board (MCC-1403)

DC5V

DC20V

DC12V

Indoor control P.

– 30 –

Power supply circuit

PMV

Fan motor

control circuit

fan

motor

Indoor

Transformer

9-1-4. Indoor Printed Circuit Board

MCC-1403

Remote control

power supply LED

/D203

HA (T10)

/CN061, DC12V

Optional output

/CN060, DC12V

Remote control

/CN41

Also used for communication of

PMV output

/CN082, DC12V

Power supply transformer (Secondary side)

(AC11V, 14V, 20V) /CN075

the central control system

/CN040

Microcomputer

operation LED

/D002

DISP /CN72, DC5V

CHK /CN071, DC5V

TC1 sensor

/CN100

TC2 sensor

/CN101

TCJ sensor

/CN102

External trouble

input/CN080

TA sensor

/CN104

Power supply

/CN067

Power supply

transformer

(Primary side)

/CN074

– 31 –

CN309

Optional

power supply

EXCT

/CN073, DC5V

AC fan output

/CN083

9-1-5. P.C. Board Optional Switch/Connector Specifications

Function

Ventilation output

Option output

Connector

No.

CN032

CN061

CN060

Pin No.



























Specifications

DC12V

Output

Start/Stop input

0V (COM)

Remote control disabling input

Operation output

DC12V (COM)

Alarm output

DC12V (COM)

Defrost output

Thermo-ON output

Cooling output

Heating output

Remarks

Setting at shipment: Linked operation; ON with indoor air conditioner operation, OFF with stop

* Single operation setting by [VENT] button of remote

control is performed from remote control. (DN=31)

HA Start/Stop input (J01: Provided/None= Pulse (At shipment from factory) / Static input selection)

Enables / disables start / stop control via remote control

ON during operation (Answer back of HA)

ON during output of alarm

ON during defrosting of outdoor unit

ON during real thermo-ON (Compressor ON)

ON when operation mode is COOL

ON when operation mode is HEAT

Outside abnormal input

Filter option trouble

CHK operation check

DISP display mode

EXCT demand

CN080

CN070

CN071

CN072

CN073

Fan output



DC12V (COM)



DC12V (COM)



Outside abnormal input



Outside setting input





Check mode input





Display mode input





Demand input





ON when indoor fan is on (When purifier is used / Interlock wiring)

The check code “L30” is generated continuously for 1 minute and the operation stops forcedly.

Setting of humidifier provided / none (Short plug attached at shipment from factory)

This function is used to check indoor operation. (The specified operation such as indoor fan “ON” is output without communication with outdoor or remote control.)

This function enables the display mode to communicate with indoor air conditioner and remote control only. (When power supply is turned on) Timer short (Usually)

Forced thermo-OFF operation of indoor air conditioner.

– 32 –

9-2. 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.

In case of wired remote control

<RBC-AMT32UL>

Procedure

FILTER RESET

TEMP.

TEST

TIMER SET MODEFAN

TIME

SET

SWING/FIX

SAVE

ON / OFF

VENT

UNIT LOUVER

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.

2, 4

TEST

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

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.)

– 33 –

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

This function is provided to check the operation of the indoor unit singly 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 trouble of the equipment may be caused. Limit using this function within 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 open 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.

Short-circuit of CHK pin(CN071)

Fan motor

Indoor PMV (∗)

Communication

P.C. board LED

Normal time

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

(H) (H) Stop

Max. opening degree (1500pls)

All ignored All ignored All ignored

Lights Lights Flashes

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

Abnormal time

– 34 –

9-3. 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 and louver 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.

FILTER RESET

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.

SET DATA

TEST

SETTING

00 01

TEMP.

TEST

UNIT

1-1

R.C.

TIMER SET MODEFAN

TIME

SET

SWING/FIX

No.

SAVE

CODE No.

ON / OFF

VENT

UNIT LOUVER

6 When the button is pushed, the system returns to

normal off state.

– 35 –

Function Select Item No. (DN) Table

(Indicates items necessary to perform the applicable control at local site)

Filter sign lighting time

Filter dirty degree

Central control address

Priority to specific indoor air conditioner

Cooling/Heating AUTO mode provided / None

Cooling only

Type

Item

Contents

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

0000: Standard 0001: Heavy dirt (Half of standard time)

0001: No.1 unit ~ 0064: No.64 unit 0099: Undefined

0000: No priority 0001: Priority

0000: AUTO Cooling/Heating provided 0001: No AUTO Cooling/Heating

(Automatic selection by connected outdoor unit)

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

0000: (1-way Air Discharge Cassette Type) 0001: (4-way Air Discharge Cassette Type)

~ 0037

At shipment from factory

0002: 2500H

0000: Standard

0099: Undefined

0000: No priority

0001: No AUTO

Cooling/Heating

0000: Heat pump

0016: Outside Air Unit

Indoor air conditioner capacity

Line address

Indoor air conditioner address

Group address

Automatic reset of power failure

HA terminal (T10) selection

Fan (Single operation)

Outside Air Unit

60 Timer setting

(wired remote control)

0000: Undefined 0001 ~ 0034

0001: No.1 unit ~ 0028: No.28 unit

0001: No.1 unit ~ 0064: No.64 unit

0000: Single 0001: Group master 0002: Group follower

0000: None 0001: Provided

0000: Normal (JEMA) 0001: Card input (shuffling omission)

0000: Unavailable 0001: Available

0000: Undefined 0001: Mixed

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

According to capacity type

0099: Undefined

0000: None

0000: Normal

(HA terminal)

0000: Unavailable

0001: Mixed

0000: Available

92 Outside interlock

release condition

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

– 36 –

0000: Operation stop

Type DN code “10”

Value Type Model

0016 Outside Air Unit MMD-AP

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

∗∗∗

Indoor Unit Capacity DN code “11”

Value

0000*

0017

0021

0023

Capacity

Invalid

048 type

072 type

096 type

—

*1 Default value stored in EEPROM

mounted on service P.C. board

HF2UL

– 37 –

9-4. 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

Indoor control P.C. board

Start/Stop input

COM (GND)

Remote control prohibition/clear input

Operation signal output

COM (+12V)

Trouble signal output

1 2 3 4 5 6

CN61

T10

(YEL)

Remote location ON/OFF control box

(TCB-IFCB-4UL)

1 2 3 4

CN06

1 2 3 4 5 6

CN13

Power supply 208/230-1-60

ON/OFF serial signal input

COM

Operation signal output

Check signal output

– 38 –

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

are displayed successively.

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

UNIT LOUVER

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

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

3131

31 .

3131

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

The setup data are as follows:

SET DATA

0000 0001

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

Unavailable (At shipment)

Available

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

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

CN032

FAN DRIVE

(2P WHI)

Indoor control

P.C. board

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

121

Outside control input of fan

To terminal

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.)

00000000

0000 )

00000000

– 39 –

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. 3 Using the timer time / button, set

00010001

0001 to the setup data.

00010001

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

3. Wiring

CN073

(YEL)

Indoor control P.C. board

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

Note

T10

121

343

565

Power peak-cut from indoor unit

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

Relay (procured locally)

Power supply

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

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

2E2E

2E .

2E2E

• Wiring example

CN073

(2P plug: RED)

Indoor control P.C. board

EXCT

Relay (procured locally)

121

Relay coil signal

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

– 40 –

ON / OFF

SETTEST

SAVE

R.C.

TMODE

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)

1 Push + + buttons

simultaneously for 4 seconds or more.

Outdoor Outdoor

2 (Line address)

Using the temperature setup buttons, set

1212

12 to the CODE No.

1212

Indoor Indoor Indoor Indoor Indoor

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.

1313

6 Using timer time / buttons, set 1

to the line address.

Line address 1

Indoor unit address 1

Group address 1

Header unit

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

1 2 2

1 3 2

Follower

unit

In case of group control

2 1 2

2 2 2

7 Push button. (OK when display goes

on.)

8 (Group address)

Using the temperature setup buttons, set

1414

14 to the CODE No.

1414

SET DATA

SETTING

00 0 1

TEST

UNIT

A L

CODE No.

No.

9 Using timer time / buttons, set

00000000

0000 to Individual,

00000000

Header unit and

Push button. (OK when display goes on.)

Push button.

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

00010001

0001 to

00010001

00020002

0002 to follower unit.

00020002

, 5, 8

END

TIMER SE

RESE

WING/FI

NIT LOUVE

3, 6, 9

4, 7, 10

1 2 3 4 5 6 7891011

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.)

END

– 41 –

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 Push button if the unit stops. 2 Push

UNIT LOUVER

button (button of 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 of left side).

TEMP.

FILTER

TEST

RESET

TIMER SET

TIME

SET

ON / OFF

FAN

MODE

SAVE

VENT

SWING/FIX

UNIT LOUVER

Operation

1 2

END

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 of 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.

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

FAN

SAVE

SWING/FIX

ON / OFF

MODE

VENT

UNIT LOUVER

3 Push button to finish the procedure.

All the indoor units in the group control stop.

1 2 3

END

– 42 –

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

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.

Carry out this procedure when the system is turned off.

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.)

ACAC

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

is displayed one after the other.

• Only fan of the selected indoor unit start operation.

UNIT LOUVER

button (button of left side), the indoor unit No. in the identical piping

[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.

FAN

SAVE

SWING/FIX

ON / OFF

MODE

VENT

UNIT LOUVER

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

1 2 3 4 5 6

END

– 43 –

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

ON / OFF

SAVE

UNIT

R.C.

TMODE

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

change. If 2 or more units are controlled in a group the fan of the selected unit will be energized.

UNIT LOUVER

button (button of left side) repeatedly to select an indoor unit address to

3 Push the TEMP. / buttons repeatedly to select

1313

13 for CODE No.

1313

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

to change. Repeat steps 4 through 6 to continue changing indoor unit address and make each of them unique.

7 Push

UNIT LOUVER

” button (button of left side) repeatedly to select another indoor unit addresses

UNIT LOUVER

button (button of left side) to review/confirm the revised addresses.

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

procedure.

WING/FI

CODE No.

3 5

SET DATA

RESE

SETTING

00 00

TIMER SE

Fin

2, 6, 7

– 44 –

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.

ACAC

2 Select line address using

button.

UNIT LOUVER

SWING/FIX

FAN

SAVE

SWING/FIX

ON / OFF

MODE

VENT

UNIT LOUVER

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.)

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

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

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.

UNIT LOUVER

button (button of left

7 Push button.

(All the indications of LCD go on.)

8 Push button and then the procedure

finishes.

Cancel of line selection

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

Push Procedure

Finish

button to select a line again in the

FAN

SAVE

SWING/FIX

ON / OFF

MODE

VENT

UNIT LOUVER

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

When you want to complete the setting

1 2 3 4 5 6 7 8

END

– 45 –

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 ].

FFFF

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

00020002

“

0002 ”

00020002

When “

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

00010001

ÆÆ

Æ “

0001 ”

ÆÆ

00010001

00000000

0000 ” appear, the check code was cleared.

00000000

ÆÆ

Æ “

0000 ” with 5-seconds interval.

ÆÆ

00000000

4 When pushing button, the status becomes normal.

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

SWING/FIX

FAN

SAVE

ON / OFF

MODE

VENT

UNIT LOUVER

00050005

0005 ”

00050005

ÆÆ

Æ “

ÆÆ

00040004

0004 ”

00040004

ÆÆ

Æ “

ÆÆ

00030003

0003 ”

00030003

ÆÆ

1 2 3 4

Returns to normal status

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.)

– 46 –

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.

0000

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

The sensor temperature of indoor unit or outdoor unit in its refrigerant line and the operating status are monitored.

UNIT LOUVER

button (button of left side) to change to item to be monitored.

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

FILTER RESET

TEMP.

TEST

TIMER SET

TIME

SET

FAN

SAVE

SWING/FIX

ON / OFF

MODE

VENT

UNIT LOUVER

4 1

Returns to normal display

1 2 3 4

– 47 –

< Based on the SMMS-e >

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

Indoor unit data *

data

System

Room temperature(Use to control)

Room temperature(Remote control)

Indoor suction air temperature (TA)*

02 03

Indoor coil temperature (TCJ)*

Indoor coil temperature (TC2)*

Indoor coil temperature (TC1)*

Indoor discharge air temperature (TF)*

Indoor PMV opening

Filter sign time

No. of connected indoor units

Total capacity of connected indoor units

No. of connected outdoor units

Total capacity of connected outdoor units

×1

×1 ×1 ×1 ×1 ×1 ×1

×1/10

×1 ×1

×10

×1

×10

°C

[0027] = 27°C

°C °F °F

[0080] = 80°F

°F °F °F

pls

[0150] = 1500pls

[2500] = 2500h

unit

[0048] = 48units

ton

[0215] = 21.5ton

unit

[0003] = 3units

ton

[0160] = 16ton

CODE No.

11 12 13 15 16 17 18

19 1A 1C 1D

Outdoor unit individual data 1 *

1E 1F

CODE No.

53 63 73

54 64 74

59 5A 5B 5D 5E

Outdoor unit individual data 2 *

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)

PMV1 opening

PMV3 opening

PMV4 opening 1 fan model : Compressor 1 curent (I1)

2 fan model : Compressor 1 and Outdoor fan 1 current (I1) 1 fan model : Compressor 2 and Outdoor fan 1 current (I2)

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

Heating/cooling recovery controlled

–

Pressure release

–

Pressure release

–

Follower unit release (U2/U3 outdoor units)

–

Data name Display format Unit Remote control display example

×10 ×10

×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1

Data name Display format Unit Remote control display example

×1 ×1 ×1

×10 A

×10 ×10

×1 ×1 ×1 ×1 ×1

×10

0:Normal

0:Normal 1:Release controlled

psi

[4350] = 435 psi

psi

°F °F °F °F °F °F

[0080]= 80 °F

°F °F °F °F °F °F

pls

[0500] = 500pls

pls pls

[0135] = 13.5A

rps

[0642] = 64.2rps

rps

mode

[0058] = 58 mode °F °F

[0024] = 24 oF °F

°F

ton

[0080] = 8 ton

[0010]=Heating recovery controlled

[0010]=Pressure release controlled

[0001]=Discharge temperature release controlled

[0100]=U2 outdoor unit release controlled

*1 The Outside Air Unit uses the revised sensor data, therefore the data below are not correctly displayed

because they are revised sensor data.

Indoor suction air temperature (TA) Indoor coil temperature (TCJ) Indoor coil temperature (TC2) Indoor coil temperature (TC1)

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

not displayed for other types. *3 When the units are connected to a group, data of the header indoor unit only can be displayed. *4 The indications, U1, U2, U3 indicate the following outdoor units, respectively. For the indication data of each

outdoor unit, check CODE No.

U1...outdoor unit (Header unit) U2...outdoor unit (Follower unit 1) U3...outdoor unit (Follower unit 2)

– 48 –

< Based on the SMMS-i >

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

Indoor unit data *

data

System

Room temperature(Use to control)

Room temperature(Remote control)

Indoor suction air temperature (TA)*

02 03

Indoor coil temperature (TCJ)*

Indoor coil temperature (TC2)*

Indoor coil temperature (TC1)*

Indoor discharge air temperature (TF)*

Indoor PMV opening

Filter sign time

No. of connected indoor units

Total capacity of connected indoor units

No. of connected outdoor units

Total capacity of connected outdoor units

×1

×1 ×1 ×1 ×1 ×1 ×1

×1/10

×1 ×1

×10

×1

×10

°C

[0027] = 27°C

°C °F °F

[0080] = 80°F

°F °F °F

pls

[0150] = 1500pls

[2500] = 2500h

unit

[0048] = 48units

ton

[0215] = 21.5ton

unit

[0003] = 3units

ton

[0160] = 16ton

CODE No.

–

1A 1B

Outdoor unit individual data 1 *

1C 1D 1E

5B 5D

Outdoor unit individual data 2 *

2A 2B 2C 2D 2E

CODE No.

6B 6D 6E

–

High-pressure sensor detention pressure (Pd)

–

Low-pressure sensor detention pressure (Ps)

–

Compressor 1 discharge temperature (TD1)

–

Compressor 2 discharge temperature (TD2)

–

Compressor 3 discharge temperature (TD3)

–

Suction temperature (TS1)

–

Outdoor coil temperature (TE1)

–

Outdoor coil temperature (TE2)

–

Outdoor coil temperature (TL)

–

Outside ambient temperature (TO)

–

PMV1,2 opening

–

PMV4 opening

–

Compressor 1 curent (I1)

–

Compressor 1 curent (I2)

–

Compressor 1 curent (I3)

– –

Compressor 1 revolutions

–

Compressor 2 revolutions

–

Compressor 3 revolutions

–

Outdoor fan mode

–

Compressor IPDU 1 heat sink temperature

–

Compressor IPDU 2 heat sink temperature

–

Compressor IPDU 3 heat sink temperature

–

Outdoor fun IPDU 1 heat sink temperature

–

Heating/cooling recovery controlled

–

Pressure release

–

Pressure release

–

Follower unit release (U2/U3 outdoor units)

Data name Display format Unit Remote control display example

×10 ×10

×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1 ×1

×1 ×10 ×10 ×10

Data name Display format Unit Remote control display example

×10 ×10 ×10

×1

0:Normal

0:Normal 1:Release controlled

psi

[4350] = 435 psi

psi

°F °F °F °F

[0080]= 80 °F °F °F °F °F

pls

[0500] = 500pls

pls

[0135] = 13.5A

A A

rps rps

[0642] = 64.2rps

rps

mode

[0500] = 500pls °F °F

[0024] = 24 °F °F

°F

[0010]=Heating recovery controlled

[0010]=Pressure release controlled

[0001]=Discharge temperature release controlled

[0100]=U2 outdoor unit release controlled

*1 The Outside Air Unit uses the revised sensor data, therefore the data below are not correctly displayed

because they are revised sensor data.

Indoor suction air temperature (TA) Indoor coil temperature (TCJ) Indoor coil temperature (TC2) Indoor coil temperature (TC1)

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

outdoor unit, check CODE No.

U1...outdoor unit (Header unit) U2...outdoor unit (Follower unit 1) U3...outdoor unit (Follower unit 2)

– 49 –

Changing of settings for Celsius display

• Push 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.)

5 6

SET DATA

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

SETTING

R.C.

UNIT

No.

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.

SET DATA

SETTING

Procedure 3

R.C.

UNIT

No.

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

SETTING

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.

– 50 –

10. TROUBLESHOOTING

10-1. Overview

(1) Before engaging in troubleshooting

(a) Applicable models

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

(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.

NO. Behavior Possible cause

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

An indoor fan would not start • Isn’t the outside temp out of range of use temperature?

An outdoor fan would not start or would

change speed for no reason

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

The air conditioner would not respond to a

start/stop command from a remote control

, Outdoor units: MMY-MAP

∗∗∗

• 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?

• Could it just be cooling operation under low outside temperature

• Could it just be defrosting operation?

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

)

∗∗∗∗

shutdown)?

conditions?

the air conditioner shutdown process after heating operation?

contro

(2) Troubleshooting procedure

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

"E28" trouble

Trouble

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

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

Any other trouble

Check trouble location or trouble part

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.

– 51 –

10-2. 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 7-

segment 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)

Check code

TCC-LINK central

control or main

remote control

display

E03

E04

E08 E08

E10

E18

L30

Outdoor 7-segment display Indicator light block

Sub-code

––

Detected indoor unit No.

L30

Display of receiving unit

Operation

Timer Ready

Flash

SIM

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

Typical problem site Description of Check code

Indoor-remote control periodic communication trouble

Indoor-outdoor periodic communication trouble

Indoor inter-MCU communication trouble

Trouble in periodic communication between indoor header and follower unit

Indoor heat exchanger

TLA––10F

temperature sensor (TCJ) trouble

Indoor heat exchanger

TLA––20F

temperature sensor (TC2) trouble

Indoor heat exchanger

TLA––30F

temperature sensor (TC1) trouble

Room air temperature sensor

TLA––01F

(TA/TSA) trouble

Discharge air temperature

TLA––11F

sensor (TF/TFA) trouble

MIS––92F

P.C. board or other indoor trouble

Duplicated indoor group header

MIS––30L

unit

Connection of group control cable

MIS––70L

to stand-alone indoor unit

MIS–80L80L

Indoor group address not set

MIS––90L

Indoor capacity not set

MIS––02L

Duplicated central control address

Indoor external trouble input (interlock)

TLA––10P

Indoor AC fan trouble

TLA––13P

Other indoor unit trouble

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

Signals are not being received from outdoor unit.

MCU communication between main control and motor microcontroller is faulty.

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

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

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

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

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

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

Indoor EEPROM is abnormal (some other trouble may be detected).

There is more than one header unit in group.

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

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

Capacity setting has not been performed for indoor unit.

There is duplication in central control address setting.

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

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

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

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

– 52 –

(Trouble detected by main remote control)

Main remote control

Check code

Outdoor 7-segment display Indicator light block

Sub-code

Display of receiving unit

Operation

Timer Ready

Typical fault site Description of trouble

Flash

E01 – –

E02 – –

E09 – –

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

Faulty remote control communication (transmission)

Duplicated master remote control

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

Signals cannot be transmitted to indoor unit.

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

(Trouble detected by central control device)

Check code

TCC-LINK central

control

C05 – –

C06 – –

– – – Multiple network adapters

C12 – – –

P30 – –

Outdoor 7-segment display Indicator light block

Sub-code

Display of receiving unit

Operation

Timer Ready

No indication (when main remote control also in use)

As per alarm unit (see above)

Flash

Typical fault site Description of trouble

Faulty central control communication (transmission)

Faulty central control communication (reception)

Blanket alarm for generalpurpose device control interface

Group control follower unit trouble

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

Central control device is unable to receive signal.

Multiple network adapters are connected to remote control communication line

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

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

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.

faulty.

– 53 –

List of Check Codes (Outdoor Unit)

(Check code detected by SMMS-e and SMMS-i outdoor interface) 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.

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

Check code

Outdoor 7-segment display

Sub-code

Number of indoor units from which

E06

signal is received normally

TCC-LINK

central control

or main remote

E07 – (E04)

E08 Duplicated indoor address

01: Indoor-outdoor communication

E12

02: Outdoor-outdoor communication

E15 – E15

00: Overloading

E16

01: Number of units connected

00: No header unit

E19

02: Two or more header units

01: Connection of outdoor unit from other refrigerant line

E20

02: Connection of indoor unit from other refrigerant line

E23 – E23

E25 – E25

Address of outdoor unit from which

E26

signal is not received normally

D82E

A3-

Subcode

01 02 03 04 05 06 07 08

09 0A 0B 0C

Fan-

IPDU

1 O

O O

O O O O

O O O O O

A3-

Sub-

IPDU

code

0D 0E 0F 11 12 13 18 19 1A 1B

O O

Circle (O): Faulty IPDU

IPDU

1 O O O

O O O O

Fan-

O O O O O O O

Display of receiving unit

Indicator light block

Operation

control

display

60E

(E08)

E12

E16

E19

E20

E26

82E.oN tinu roodtuo detcete

13E13E

Timer Ready

Typical problem site Description of problem

Flash

Signal lack of indoor unit

Indoor-outdoor communication circuit trouble

Duplicated indoor address

Automatic address starting trouble

Indoor unit not found during automatic address setting

Too many indoor units connected/overloading

Trouble in number of outdoor header units

Connection to other refrigerant line found during automatic address setting

Outdoor-outdoor communication transmission trouble

Duplicated follower outdoor address

Signal lack of outdoor unit

Outdoor follower unit trouble

IPDU communication trouble

Sub MCU communication

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

Signal cannot be transmitted to indoor units (

indoor units left without communication from

outdoor unit).

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

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.

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

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

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

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

Signal cannot be transmitted to other outdoor units.

There is duplication in outdoor addresses set manually.

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

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

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

trouble

F05 –

01: TE1

F06

02: TE2

01: TL1 02: TL2 03: TL3

F05

Outdoor discharge

TLA40F–40F

temperature sensor (TD1) trouble

Outdoor discharge

ALT

temperature sensor (TD2) trouble

Outdoor heat exchanger liquid side temperature

TLA60F

sensor (TE1, TE2) trouble

Outdoor liquid temperature

TLA70F70F

sensor (TL1, TL2, TL3) trouble

Outdoor outside air

TLA80F–80F

temperature sensor (TO) trouble

– 54 –

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

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

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

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

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

Check code

Outdoor 7-segment display

Sub-code

TCC-LINK

central control

or main remote

control display

01: TG1 02: TG2

01: T

03: TS3

–TLA32F32F

H05 – H05

H06 – H06

01: TK1 sensor trouble 02: TK2 sensor trouble

H08

03: TK3 sensor trouble

04: TK4 sensor trouble 05: TK5 sensor trouble

H08

H15 – H15

01: TK1 sensor trouble 02: TK2 sensor trouble

H16

03: TK3 sensor trouble

04: TK4 sensor trouble 05: TK5 sensor trouble

H16

H25 – H25

Number of priority indoor units

L06

(check code L05 or L06 depending on individual unit)

L23

–

L23

Display of receiving unit

Indicator light block

Operation

Timer Ready

Flash

ALTF09F09

SIM

Typical problem site Description of problem

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

Outdoor suction temperature sensor

TLA21F21F

(TS1,TS3) trouble

Outdoor temperature sensor (TE1,TL1)

TLA51F–51F

wiring trouble

Outdoor pressure sensor

TLA61F–61F

(Pd, Ps) wiring trouble

Low pressure sensor (Ps) trouble

High pressure sensor (Pd)

TLA42F–42F

trouble

Outdooe EEPROM troubleMIS13F–13F

Outdoor discharge temperature sensor (TD1) wiring trouble

Activation of low-pressure protectio

orp level lio woL70H–70H

Trouble in temperature sensor for oil level detection (TK1-TK5)

Outdoor discharge temperature sensor (TD2) wiring trouble

Oil level detection circuit trouble

Outdoor discharge temperature sensor (TD3) wiring trouble

licated outdoor

Dup

MIS40L–40L

refrigerant line address

Duplicated priority indoor

MIS50L

unit (as displayed on priority indoor unit)

Duplicated priority indoor unit (as displayed on

MIS60L

indoor unit other than

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

-short circuited.

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

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

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

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

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

Outd

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

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

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

Temperature sensor for oil level detection

noitcet

(TK1-TK5) detects abnormally low oil level.

Temperature sensor for oil level detection (TK1-TK5) has been open/short-circuited.

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

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

Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD3) has been detected.

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

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

More than one indoor unit as priority indoor unit.

priority indoor unit)

Indoor group address not

MIS)80L(–80L

set

oor model

Outd

MIS71L–71L

incompatibility trouble

SW setting mistake

Too many outdoor units

MIS82L–82L

connected

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

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

tes ton yticapac roodtuOMIS01L–01L

board replacement).

Old model outdoor unit (prior to 4 series) has been connected.

Bit 3 and 4 of SW17 are turning on.

More than three outdoor units have been connected.

have been set up

– 55 –

Outdoor 7-segment display

Sub-code

A3-

Sub-

IPDU

code

03 04 05 06 07 08

09 0A 0B 0C

O O

00: Open phase detected

01: Compressor 1

P05

02: Compressor 2 03: Compressor 3

01: Compressor 1

P07

02: Compressor 2 03: Compressor 3

01: TS condition

P15

02: TD condition

Check code

Fan-

Sub-

IPDU

code

0D 0E 0F 11 12 13 18 19

O O

Circle (O): Faulty IPDU

Display of receiving unit

TCC-LINK central control or main remote

control

display

A3-

Fan-

IPDU

O O

O O O O

Indicator light block

Operation

71P–71P

Timer Ready

Typical problem site Description of problem

Flash

Trouble in number IPDUsMIS92L92L

Indoor external trouble

MIS)03L(.oN tinu roodni detceteD03L

input (interlock)

Outdoor discharge (TD1)

TLA30P–30P

temperature trouble

Open phase/power failure

Inverter DC voltage (Vdc)

TLA50P

trouble MG-CTT trouble

Heat sink overheating

TLA70P

trouble

Outdoor liquid backflow

TLA31P–31P

detection trouble

Outdoor discharge (TD2)

TLA

temperature trouble

Outdoor discharge (TD3)

ALTP18–P18

temperature trouble

4-way valve reversing

TLA91Pdetceted .oN tinu roodtuO91P

trouble

Activation of high-pressure

TLA02P–02P

protection

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

noitceted kael saGTLA51P

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

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

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

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

Temperature sensor built into IPM (TH) detects overheating.

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

wolf

indoor unit).

State of refrigerant cycle circuit indicates liquid backflow operation.

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

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

Outdoor discharge temperature sensor (TD3) detects abnormally high temperature.

Abnormality in refrigerating cycle is detected during heating operation.

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

MG-CTT: Magnet contactor

– 56 –

(Check code detected by IPDU featuring in SMMS-e and SMMS-i outdoor unit)

Check code

Outdoor 7-segment display

Sub-code

01: Compressor 1

F13 TLA31F

02: Compressor 2 03: Compressor 3

01: Compressor 1

H01

02: Compressor 2 03: Compressor 3

01: Compressor 1

H02

02: Compressor 2 03: Compressor 3

01: Compressor 1

H03

02: Compressor 2 03: Compressor 3

01: Compressor 1

P04

02: Compressor 2 03: Compressor 3

01: Compressor 1

P07

02: Compressor 2 03: Compressor 3

#0:Element short circuit #1:Position detection circuit trouble #3:Motor lock trouble #4:Motor current trouble

P22

#C:TH Sensor temperature trouble #D:TH Sensor short circuit/release

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

TCC-LINK central control or main remote

control display

Display of receiving unit

Indicator light block

Operation

H02

H03

Timer Ready

Typical problem site Description of proplem

Flash

Trouble in temperature sensor built into indoor IPM (TH)

Compressor trouble (lockup)

Current detection circuit trouble

Activation of high-pressure

TLA40P

Heat sink overheating

TLA70P

trouble

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

Inverter current (Idc) detection circuit detects

nwodkaerb rosserpmoC10H

overcurrent.

Compressor lockup is detected

Abnormal current is detected while inverter compressor is turned off.

High-pressure SW is activated.

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

Outdoor fan IPDU detects trouble.Outdoor fan IPDU troubleTLA22P

01: Compressor 1

P26 TLA62P

02: Compressor 2 03: Compressor 3

01: Compressor 1

P29 TLA92P

02: Compressor 2 03: Compressor 3

Activation of IPM short-circuit protection

Compressor position detection circuit trouble

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

Compressor motor position detection trouble is detected.

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

the outdoor unit configuration

– 57 –

10-3. Troubleshooting Based on Information Displayed on

SET

SAVE

ON / OF

Remote Control

Using main remote control (RBCAMT32UL)

(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

Check code

Indoor unit No. in which fault has occurred

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

<7-segment display symbols>

TESTRE

TIMER SE

WING/F

NIT LOUVE

Normal display is restored.

Steps to follow

MOD

321

012 345 67 8 9 AbCdEFHJLP

– 58 –

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 “10-2. Troubleshooting Method”.

: Goes off : Lighting : Blinking (0.5 seconds)

tluaf fo esuaCedoc kcehCkcolb thgiL

Operation Timer Ready

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

All lights out

Operation Timer Ready

Blinking

Operation Timer Ready

Blinking

E01 Faulty reception

E02 Faulty transmission

E03 Loss of communication

E08 Duplicated indoor unit No. (address)

E09 Duplicated master remote control

E10 Indoor unit inter-MCU communication trouble

E12 Automatic address starting trouble

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

E04

E06 Faulty reception in indoor-outdoor communication (

E07 Faulty transmission in indoor-outdoor communication

E15 Indoor unit not found during automatic address setting

E16 Too many indoor units connected/overloading

E19 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

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

Receiving unit

Signal lack of indoor unit)

Trouble or poor contact in wiring between receiving and indoor units

Setting trouble

Operation Timer Ready

Alternate blinking

Operation Timer Ready

Alternate blinking

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

P07

P15 Gas leak detection - insufficient refrigerant charging

P17 Outdoor discharge (TD2) temperature trouble

P18 Outdoor discharge (TD3) temperature trouble

P19 Outdoor 4-way valve reversing trouble

P20 Activation of high-pressure protection

P22 Outdoor fan IPDU trouble

P26 Outdoor

P29 Compressor position detection circuit trouble

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

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

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

IPM short-circuit trouble

MG-CTT: Magnet contactor

– 59 –

Operation Timer Ready

Alternate blinking

Operation Timer Read

Alternate blinking

Operation

Timer Ready

tluaf fo esuaCedoc kcehCkcolb thgiL

F01

F02

F03

F10

F11

F04

F05

F06

F07

F08

F12

F13

F15

F16

F23 Low pressure sensor (Ps) trouble

F24

F29 Fault in indoor EEPROM

Heat exchanger temperature sensor (TCJ) trouble

Heat exchanger temperature sensor (TC2) trouble

Heat exchanger temperature sensor (TC1) trouble

Indoor unit temperature sensor troubles

Ambient temperature sensor (TA/TSA) trouble

Discharge temperature sensor (TF) trouble

Discharge temperature sensor (TD1) trouble

Discharge temperature sensor (TD2) trouble

Heat exchanger temperature sensor (TE1, TE2) trouble

Liquid temperature sensor (TL1, TL2, TL3) trouble

Outdoor unit temperature sensor troubles

Outside air temperature sensor (TO) trouble

Suction temperature sensor (TS1,TS3) trouble

Heat sink sensor (TH) trouble

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

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

Outdoor unit pressure sensor

High pressure sensor (Pd) trouble

troubles

Synchronized blinking

Operation Timer Ready

Blinking

Operation

Timer Ready

Synchronized blinking

Timer Ready

Synchronized blinking

H01 Compressor breakdown

H02

H03

Compressor lockup

Current detection circuit trouble

Outdoor unit compressor or A-3-IPDU related troubles

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

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

H07

H08

Abnormal drop in oil level

Trouble in temperature sensor for oil level detection circuit (TK1, TK2, TK3, TK4 or TK5)

Protective shutdown of outdoor unit

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

H16 Oil level detection circuit trouble - Trouble in outdoor unit TK1, TK2, TK3, TK4 or TK5 circuit

H25

Wiring/installation trouble or detachment of outdoor discharge temperature sensor (TD3)

L02 Outdoor unit model unmatched trouble

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

L23 SW setting mistake

L24 Flow selector unit(s) setting trouble

L28 Too many outdoor units connected

L29 Trouble in number of IPDUs

L30 Indoor external interlock trouble

– 60 –

Light block Check code Cause of fault

y y

Operation

Timer Read

F31 Outdoor EEPROM trouble

Synchronized blinking

Other (indications not involving check code)

Light block Check code Cause of fault

Operation Timer

Synchronized blinking

Operation Timer Read

Alternate blinking

Read

– Test run in progress

Setting incompatibility

–

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

– 61 –

10-4. Check Codes Displayed on Remote Control and SMMS-e and

SMMS-i 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

E01 — —

E02 — —

E03 — —

E04 — —

E06 E06

— E07 —

E08 E08

E09 — —

E10 — —

E12 E12

E15 E15 —

Check code

Outdoor 7-segment display

Check

code

Sub-code

No. of indoor units from which signal is received normally

Duplicated indoor address

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

Location

detection

Remote control

Indoor unit

I/F Signal lack of

I/F Indoor-outdoor

Indoor unit I/F

Remote control

Indoor unit

I/F Automatic

I/F Indoor unit not

Description System status

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

Remote control transmission trouble

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

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

indoor unit

communication circuit trouble (detected at outdoor end)

Duplicated indoor address

Duplicated master remote control

Indoor interMCU communication trouble

address starting trouble

found during automatic address setting

Trouble detection

condition(s)

Stop of corresponding unit

All stop Indoor unit initially

All stop Signal cannot be transmitted from

All stop More than one indoor unit are

Stop of corresponding unit

All stop • Indoor automatic address setting

All stop Indoor unit cannot be

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

Signal cannot be transmitted from remote control to indoor unit.

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

Indoor unit is not receiving signal from outdoor unit.

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

outdoor to indoor units for 30 seconds continuously.

assigned same address.

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.)

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

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.

detected after indoor automatic address setting is started.

Check items (locations)

• 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.

• Check internal transmission circuit of remote control.

--- Replace remote control as necessary.

• Check remote control and network adaptor wiring.

• 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).

• 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).

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

• Check connection of indooroutdoor communication circuit.

• Check indoor addresses.

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

• Check remote control settings.

• Check remote control P.C. boards.

• Check for defect in indoor P.C. board

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

• 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.

– 62 –

Main

Check code

Outdoor 7-segment display

remote

Check

control

code

00: Overloading 01-: No. of units connected

Sub-code

Location

detection

I/F Too many

E16 E16

E18 — — Indoor

00: No header unit 02:

E19 E19

E20 E20

Two or more header units

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

unit

I/F Trouble in

I/F Connection to

I/F Outdooroutdoor

E23 E23 —

E25 E25 —

Address of outdoor unit from which signal is not received normally

I/F Duplicated

I/F Signal lack of

E26 E26

Detected outdoor unit No.

I/F Outdoor

E28 E28

Description System status

indoor units connected

Trouble in communication between indoor header and follower units

number of outdoor header units

other line found during automatic address setting

communication transmission trouble

follower outdoor address

outdoor unit

follower unit trouble

Trouble detection

condition(s)

All stop • Combined capacity of indoor units

Stop of corresponding unit

All stop • There are more than one outdoor

All stop Equipment from other line is found

All stop Signal cannot be transmitted to

All stop There is duplication in outdoor

All stop Outdoor unit initially

All stop Outdoor header unit receives

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.

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

header units in one line.

• There is no outdoor header unit in one line.

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

other outdoor units for at least 30 seconds continuously.

addresses set manually.

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

trouble code from outdoor follower unit.

Check items (locations)

• 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).

• Check remote control wiring.

• Check indoor power supply wiring.

• Check P.C. boards of indoor units.

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).

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

• 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.

Note:

Do not set outdoor addresses manually.

• 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).

• 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.

– 63 –

Main

Outdoor 7-segment display

remote control

E31 E31

Check

code

Sub-code

Subcode

01 02

03 04

05 06

07 08

09 0A

0B 0C

0D 0E

11 12

13 18

19 1A

Circle (O): Faulty IPDU

F01 — —

F02 — —

F03 — —

F04 F04 —

F05 F05 —

Check code

01: TE1 sensor trouble 02: TE2 sensor trouble

F06 F06

01: TL1 sensor trouble 02: TL2 sensor trouble

F07 F07

03: TL3 sensor trouble

F08 F08 —

02: TG2 sensor trouble

F09 F09

F10 — —

A3-

IPDU

Location

detection

Fan-

I/F IPDU

IPDU

O O

O O O

O O

O O O

Indoor unit

I/F TD1 sensor

I/F TD2 sensor

I/F TE1/TE2

I/F TL1 sensor

I/F TO sensor

I/F01: TG1 sensor trouble

Indoor unit

Description System status

communication trouble

Communication trouble between MCU and Sub MCU

Indoor TCJ sensor trouble

Indoor TC2 sensor trouble

Indoor TC1 sensor trouble

trouble

sensor trouble

trouble

TG1/TG2 sensor trouble

Indoor TA sensor trouble

All stop Communication is disrupted

All stop Communication between MCU and

Stop of corresponding unit

All stop Sensor resistance is infinity or zero

Stop of corresponding unit

Trouble detection

condition(s)

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

Sub MCU stopped.

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

(open/short circuit).

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

Check items (locations)

• 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.

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

• Outdoor I/F PC board trouble check

• Check connection of TCJ sensor connector and wiring.

• Check resistance characteristics of TCJ sensor.

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

• Check connection of TC2 sensor connector and wiring.

• Check resistance characteristics of TC2 sensor.

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

• Check connection of TC1 sensor connector and wiring.

• Check resistance characteristics of TC1 sensor.

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

• Check connection of TD1 sensor connector.

• Check resistance characteristics of TD1 sensor.

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

• Check connection of TD2 sensor connector.

• Check resistance characteristics of TD2 sensor.

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

• Check connection of TE1/TE2 sensor connectors.

• Check resistance characteristics of TE1/TE2 sensors.

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

• 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).

• Check connection of TO sensor connector.

• Check resistance characteristics of TO sensor.

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

• Check connection of TG1/TG2 (open/short circuit).

• Check resistance characteristics of TG1/TG2 sensors.

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

• Check connection of TA sensor connector and wiring.

• Check resistance characteristics of TA sensor.

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

– 64 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

F11 — —

Check code

01: TS1 sersor trouble

F12 F12

F13 F13

03: TS3 sersor trouble

01: Compressor 1 side 02: Compressor 2 side 03: Compressor 3 side

F15 F15 —

Location

detection

Indoor unit

I/F TS1/TS3

IPDU TH sensor

I/F Outdoor

Description System status

Indoor TF sensor trouble

sensor trouble

trouble

temperature sensor wiring trouble (TE1, TL1)

Trouble detection

condition(s)

Stop of corresponding unit

All stop Sensor resistance is infinity or zero

All stop During compressor operation in

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

(open/short circuit).

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

Check items (locations)

• Check connection of TF sensor connector and wiring.

• Check resistance characteristics of TF sensor.

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

• Check connection of TS1/TS3 sensor connector.

• Check resistance characteristics of TS1/TS3 sensor.

• Check for defect.

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

• 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 —

F23 F23 —

F24 F24 —

F29 — —

F31 F31 —

01: Compressor 1 side 02: Compressor 2 side

H01 H01

03: Compressor 3 side

01: Compressor 1 side 02: Compressor 2 side 03: Compressor 3 side

H02 H02

01: Compressor 1 side

H03 H03

*1 Total shutdown in case of header unit

Continued operation in case of follower unit

02: Compressor 2 side 03: Compressor 3 side

I/F Outdoor

I/F Ps sensor

I/F Pd sensor

Indoor unit

I/F Outdoor

IPDU Compressor

IPDU Current

pressure sensor wiring trouble (Pd, Ps)

trouble

Other indoor trouble

EEPROM trouble

breakdown

trouble (lockup) MG-CTT trouble

detection circuit trouble

All stop Readings of high-pressure Pd

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

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

All stop Output voltage of Pd sensor is zero

Stop of corresponding unit

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

All stop Inverter current detection circuit

All stop Overcurrent is detected several

All stop Current flow of at least specified

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

Indoor P.C. board does not operate normally.

operate normally.

detects overcurrent and shuts system down.

seconds after startup of inverter compressor.

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

• 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.

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.

• Check connection of Pd sensor connector.

• Check for defect in Pd sensor.

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

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

• Check power supply voltage.

• Check power supply noise.

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

• 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).

• 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.

• Check current detection circuit wiring.

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

MG-CTT: Magnet contactor

– 65 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

H05 H05 —

H06 H06 —

H07 H07 —

Check code

01: TK1 sensor trouble 02: TK2 sensor trouble 03: TK3 sensor trouble 04: TK4 sensor trouble 05: TK5 sensor trouble

H08 H08

H15 H15 —

Location

detection

I/F TD1 sensor

I/F Activation of

I/F Low oil level

I/F Trouble in

I/F TD2 sensor

Description System status

miswiring (incomplete insertion)

low-pressure protection

protection

temperature sensor for oil level detection

miswiring (incomplete insertion)

Trouble detection

condition(s)

All stop Discharge temperature of

All stop Low-pressure Ps sensor detects

All stop Operating compressor detects

All stop Sensor resistance is infinity or zero

All stop Discharge temperature of (TD2)

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

operating pressure lower than

0.02MPa.

continuous state of low oil level for about 2 hours.

(open/short circuit).

does not increase despite compressor 2 being in operation.

Check items (locations)

• 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).

• 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.

• Check balance pipe service valve to confirm full opening.

• Check connection and installation of TK1, TK2, TK3, TK4, and TK5 sensors.

• Check resistance characteristics of TK1, TK2, TK3, 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.

• Check connection of TK1 sensor connector.

• Check resistance characteristics of TK1 sensor.

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

• Check connection of TK2 sensor connector.

• Check resistance characteristics of TK2 sensor.

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

• Check connection of TK3 sensor connector.

• Check resistance characteristics of TK3 sensor.

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

• Check connection of TK4 sensor connector.

• Check resistance characteristics of TK4 sensor.

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

• Check connection of TK5 sensor connector.

• Check resistance characteristics of TK5 sensor.

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

• 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).

– 66 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

01: TK1 oil circuit trouble 02: TK2 oil circuit trouble 03: TK3 oil circuit trouble 04: TK4 oil circuit trouble 05: TK5 oil circuit trouble

H16 H16

H25 H25 —

L02 L02 —

L03 — —

L04 L04 —

L05 — —

Check code

Location

detection

I/F Oil level

I/F TD3 sensor

Indoor unit

I/F Duplicated

Description System status

detection circuit trouble

miswiring

Outdoor units model disagreement trouble

Duplicated indoor header unit

outdoor line address

priority indoor unit (as displayed on priority indoor unit)

Trouble detection

condition(s)

All stop No temperature change is detected

All stop Air discharge temperature (TD3)

Stop of corresponding unit

All stop There is duplication in line address

All stop More than one indoor units have

by TK1 despite compressor 1 having been started.

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

No temperature change is detected by TK3 despite compressor having been started.

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

No temperature change is detected by TK5 despite compressor having been started.

does not increase despite compressor 3 being in operation.

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

There are more than one header units in group.

setting for outdoor units belonging to different refrigerant piping systems.

been set up as priority indoor unit.

Check items (locations)

• Check for disconnection of TK1 sensor.

• Check resistance characteristics of TK1 sensor.

• Check for connection trouble involving TK1, TK2, TK3, TK4, and TK5 sensors

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

• Check for refrigerant entrapment inside compressor.

• Check for disconnection of TK2 sensor.

• Check resistance characteristics of TK2 sensor.

• Check for connection trouble involving TK1, TK2, TK3, TK4, and TK5 sensors

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

• Check for refrigerant entrapment inside compressor.

• Check for disconnection of TK3 sensor.

• Check resistance characteristics of TK3 sensor.

• Check for connection trouble involving TK1, TK2,TK3, TK4, and TK5 sensors

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

• Check for refrigerant entrapment inside compressor.

• Check for disconnection of TK4 sensor.

• Check resistance characteristics of TK4 sensor.

• Check for connection trouble involving TK1, TK2, TK3, TK4, and TK5 sensors

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

• Check for refrigerant entrapment inside compressor.

• Check for disconnection of TK5 sensor.

• Check resistance characteristics of TK5 sensor.

• Check for connection trouble involving TK1, TK2, TK3, TK4, and TK5 sensors

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

• Check for refrigerant entrapment inside compressor.

• Check installation of TD3 sensor.

• Check connection of TD3 sensor connector and wiring.

• Check resistance characteristics of TD3 sensor.

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

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

• Check indoor addresses.

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

• Check line addresses.

• Check display on priority indoor unit.

– 67 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

No. of priority indoor units

L06 L06

L07 — —

L08 L08 —

L09 — —

L10 L10 —

L20 — —

L23 — —

L28 L28 —

Check code

Subcode

01 02

03 04

05 06

07 08

L29 L29

11 12

13 18

19 1A

Circle (O): Faulty IPDU

Detected indoor address

L30 L30

— L31 —

P01 — —

A3-

IPDU

Location

detection

I/F Duplicated

Indoor unit

I/F Outdoor

Network adaptor Indoor unit

I/F SW setting

I/F Too many

Fan-

I/F Trouble in No.

IPDU

O O

O O O

Indoor unit

I/F Extended IC

Indoor unit

Description System status

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

Connection of group control cable to standalone indoor unit

Indoor group / addresses not set

Indoor capacity not set

capacity not set

Duplicated central control address

mistake

outdoor units connected

of IPDUs

External interlock of indoor unit

trouble

Indoor fan motor trouble

All stop More than one indoor units have

Stop of corresponding unit

All stop Jumper wire provided on P.C.

All stop There is duplication in central

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

All stop There are more than three outdoor

All stop Insufficient number of IPDUs are

Stop of corresponding unit

Continued operation

Stop of corresponding unit

Trouble detection

condition(s)

been set up as priority indoor unit.

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

Address setting has not been performed for indoor units.

Capacity setting has not been performed for indoor unit.

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

control address setting.

operate normally.

units.

detected when power is turned on.

• Signal is present at external trouble input terminal (CN080) for 1 minute.

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

Check items (locations)

• Check displays on priority indoor unit and outdoor unit.

• Check indoor addresses.

Note:

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

Set indoor capacity. (DN = 11)

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

• Check central control addresses.

• Check network adaptor P.C. board .

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

• 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).

• 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.

When external device is connected to CN080 connector:

1) Check for defect in external

device.

2) Check for defect in indoor P.C.

board.

When external device is not connected to CN080 connector:

1) Check for defect in indoor P.C.

board.

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

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

• Check wiring.

– 68 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

P03 P03 —

Check code

01: Compressor 1 side 02: Compressor 2 side 03: Compressor 3 side

P04 P04

00: I/F Detection of

P05 P05

01: Compressor 1 side 02: Compressor 2 side 03: Compressor 3 side

P07 P07

P13 P13 —

Location

detection

I/F Discharge

IPDU Activation of

IPDU I/F

I/F Outdoor liquid

Description System status

temperature TD1 trouble

high-pressure SW

open phase/ phase sequence

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

Heat sink overheating trouble

backflow detection trouble

Trouble detection

condition(s)

All stop Discharge temperature (TD1)

exceeds 239°F (115°C).

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

All stop • Open phase is detected when

All stop Temperature sensor built into IPM

All stop <During cooling operation>

power is turned on.

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

(TH) is overheated.

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, 2, 3 continuously registers opening of 300p or less while under superheat control.

Check items (locations)

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

• Check outdoor PMVs (PMV1, 2, 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, SV42 or SV43).

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, 2, 3) 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.

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

• Check wiring of outdoor power supply.

• 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))

• Check full-close operation of outdoor PMV (1, 2, 3).

• 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

– 69 –

Main

Outdoor 7-segment display

remote control

Check

code

Sub-code

01: TS condition I/F Gas

P15 P15

02: TD condition I/F Gas leak

P17 P17 —

P18 P18 —

Check code

Detected outdoor unit No.

P19 P19

P20 P20 —

Location

detection

I/F Discharge

I/F 4-way valve

I/F Activation of

Description System status

leakdetection (TS1 condition)

detection (TD condition)

temperature TD2 trouble

temperature TD3 trouble

reversing trouble

high-pressure protection

Trouble detection

condition(s)

All stop Protective shutdown due to

All stop Discharge temperature (TD2)

All stop Discharge temperature (TD3)

All stop Abnormal refrigerating cycle data is

All stop <During cooling operation>

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)

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.

exceeds 239°F (115°C).

exceeds 239 °F (115 °C).

collected during heating 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 items (locations)

• Check for insufficiency in refrigerant quantity.

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

• Check PMVs (PMV1, 2, 3) for clogging.

• Check resistance characteristics of TS1 sensor.

• Check for defect in 4-way valve.

• Check SV4 circuit for leakage

• Check for insufficiency in refrigerant quantity.

• Check PMVs (PMV 1, 2, 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).

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

• Check outdoor PMVs (PMV1, 2, 3) 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, SV42 and SV43).

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

• Check outdoor PMVs (PMV1, 2,

4) for clogging.

• Check resistance characteristics of TD3 sensor.

• Check for defect in 4-way valve.

• Check SV4 circuit for leakage.

• Check SV4 circuit (for wiring or installation error involving SV41, SV42 and SV43).

• 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.

• 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, 2, 3) 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.

– 70 –

Main

Check code

Outdoor 7-segment display

remote

Check

control

code

Sub-code

Location

detection

#0:Element short circuit IPDU Outdoor fan

#1:Position detection circuit trouble

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

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

P22 P22

#C:TH sensor temperature trouble

#D:TH sensor short circuit/release trouble

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

01: Compressor 1 side 02: Compressor 2 side

P26 P26

P29 P29

03: Compressor 3 side

01: Compressor 1 side 02: Compressor 2 side 03: Compressor 3 side

P31 — —

IPDU IPM shortcircuit

IPDU Compressor

Indoor unit

TCC-LINK

C05 — —

TCC-LINK

C06 — —

Generalpurpose

C12 — —

Differs according to nature of alarm-causing trouble

device I/F

TCC-LINK

P30

(L20 displayed.) Duplicated

Description System status

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

All stop (Sub code: #0)

All stop (Sub code: #1)

All stop (Sub code: #C)

All stop (Sub code: #D)

protection trouble

position detection circuit trouble

Other indoor trouble (group follower unit trouble)

TCC-LINK central control device transmission trouble

TCC-LINK central control device reception trouble

Batch alarm for generalpurpose device control interface

Group control follower unit trouble

central control address

All stop Overcurrent is momentarily

All stop Position detection is not going on

Stop of corresponding unit

Continued operation

Trouble detection

condition(s)

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

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

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

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

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

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

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

detected during startup of compressor.

normally.

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

Central control device is unable to transmit signal.

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

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

There is duplication in central control addresses.

Check items (locations)

• Check fan motor.

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

• Check fan motor.

• Check connection of fan motor

• connector.

• Check for defect in fan IPDU P.C.

• board.

• Check fan motor.

• Check for defect in fan IPDU P.C.

• board.

• Check fan motor.

• Check connection of fan motor connector.

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

• Check fan motor.

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

• 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.

• 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).

• Check wiring and connector connection.

• Check for compressor layer short-circuit.

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

• Check indoor P.C. board.

• Check for defect in central control device.

• Check for defect in central control communication line.

• Check termination resistance setting.

• 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.

• Check trouble input.

• Check check code of unit that has generated alarm.

• Check address settings.

– 71 –

10-5. Sensor Characteristics

Indoor Unit

Temperature sensor characteristics

Indoor TA and TF sensor

Resistance

[kΩ]

(10)

(20)

Temperature [˚F (˚C)]

(30)

104 (40)

122

(50)

140 (60)

Temperature

[˚F (˚C)]

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)

Resistance

[kΩ]

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

Indoor TC1 sensor

200

]

or below)

150

100

-22

(-30)

-4

(-20)

Resistance

(55 ˚F (10 ˚C)

Indoor TC2 and TCJ sensors

200

]

or below)

150

100

-22

(-30)

-4

(-20)

Resistance

(55 ˚F (10 ˚C)

(-10)32(0)

(10)68(20)86(30)

Temperature [˚F (˚C)]

(10)68(20)86(30)

Temperature [˚F (˚C)]

104

(40)

104

(40)

122

(50)

122

(50)

140

(60)

140

(60)

158

(70)

158

(70)

176 (80)

194

(90)

194

(90)

212

(100)

212

(100)

Resistance

]

(55 ˚F (10 ˚C)

or above)

Resistance

]

(55 ˚F (10 ˚C)

or below)

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

212 (100)

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]

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

Resistance

[kΩ]

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

– 72 –

11. OWNER’S MANUAL

–1–

Precautions for safety

equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the

unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety

information. This is the safety alert symbol . When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and

CAUTION. These words are used with the safety alert symbol.

DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING

signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which

Installing, starting up, and servicing air conditioning equipment can be hazardous due to system pressures,

electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning indoor unit air filter. All other

operations should be performed by trained service personnel.

Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached

to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky

may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which

manual.

will result in enhanced installation, reliability, or operation.

The manufacturer shall not assume any liability for the damage caused by not observing the description of this

WARNING

operation.

General

• Carefully read Owner’s Manual before starting the air conditioner. There are many important things to keep in mind for daily

water leakage, noise and vibration.

conditioner. If a non-qualified person installs an air conditioner, it may result in problems such as fire, electric shock, injury,

• Ask for installation to be performed by the dealer or a professional. Only a qualified installer is able to install an air

• 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.

• Places where the operation sound of the outdoor unit may cause a disturbance. (Especially at the boundary line with a

no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may result

Installation

in electric shocks and/or electrical leaks.

• Only a qualified installer or qualified service person is allowed to carry out the electrical work of the air conditioner. Under

neighbor, install the air conditioner while considering the noise.)

that trouble has occurred in the air conditioner, set the circuit breaker to the OFF position, and contact a service person.

• After the installation work has been completed, have the installer explain about the circuit breaker positions. In the event

• If the unit is installed in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit

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

concentration even if it leaks. Consult the dealer from whom you purchased the air conditioner when you implement the

measures. Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.

• Do not install the air conditioner in a location that may be subject to a risk of expire to a combustible gas. If a combustible

• If separately sold products are used, use TOSHIBA/Carrier specified products only. Using unspecified products may cause

fire, electric shock, water leak or other failure.

• Connect ground wire. (grounding work) Incomplete grounding may cause an electric shock.

Thank you very much for purchasing TOSHIBA/Carrier Air Conditioner.

Please read this owner’s manual carefully before using your Air Conditioner.

• Be sure to obtain the “Owner’s manual” from constructor (or dealer).

We would appreciate your understanding of the Owner's manual and we kindly ask for your long and continued use.

ADOPTION OF NEW REFRIGERANT

to prevent destruction of the ozone layer.

This Air Conditioner adopts a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order

This appliance can be used by children aged from 8 years and above and persons with reduced physical,

sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or

instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall

not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.

1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Part names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3 Part names and functions of the remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Contents

– 73 –

4 Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

5 Timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

7 Notes on operations and performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

8 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1-EN 2-EN

CAUTION

wet.

Cautions about installation (Confirm the following cautions.)

or inappropriate installation may cause fire.

• Certainly lay the drain hose for perfect draining. Bad drainage may cause flooding in the house and getting furniture

• Use an exclusive power supply circuit for air conditioner at the rated voltage. An insufficient power supply capacity

• Confirm that the outdoor unit are fixed on the base. Otherwise, falling down of the units or other accidents may occur.

Cautions about operation

breeding animals, car, vessel, etc.

safety.

• Do not operate the buttons with wet hands. Doing so may cause electric shock.

temperature specified in the instructions. Otherwise it may cause a malfunction, or water leak from the unit.

• If the air conditioner will not be used for a considerably long time, turn off the main switch or the circuit breaker, for

• To make the air conditioner operate in its original performance, operate it within the range of the operating

• Do not use this air conditioner for special purpose such as preserving food, precision instruments, art objects,

Leaving them such condition may result in the unit’s falling down and causing injury.

aerosol directly to the air conditioner. They may catch fire.

Otherwise, injury may result as the fan is rotating at high speed inside the unit.

Cleaning the air conditioner in an improper manner may cause damage to plastic parts, insulation failure of electric

parts, and result in a malfunction. In the worst case, it may result in water leakage, electric shock, smoke emission

and fire.

• Prevent any liquid from falling into the remote control. Do not spill juice, water or any kind of liquid.

• Do not wash the air conditioner. Doing so may result in electric shock.

• Check whether the installation base and other equipment have become deteriorated after being used for a long time.

• Do not leave flammable sprays or other flammable materials near the air conditioner, and do not spray flammable

• Stop running the air conditioner and turn off the breaker before cleaning.

• Ask an authorized dealer or qualified service person for cleaning of the air conditioner

Water intrusion into the unit may occur and it may cause deterioration of electric insulation and result in electric shock.

• Do not put a water container such as a vase on the unit.

–2–

breaker to the OFF position may result in electric shocks through contact with the interior parts. Only a qualified

installer or qualified service person is allowed to remove the intake grille of the indoor unit or service panel of the

outdoor unit and do the work required.

fingers or physical objects becoming trapped in the rotating parts, do not remove the intake grille of the indoor unit or

service panel of the outdoor unit. When work involving the removal of these parts is required, contact a qualified

installer or a qualified service person.

during removing the cover and main unit.

working at heights. Due to the danger of falling off the stand and injuring yourself while working at heights, this kind

of work should not be done by unqualified individuals. When this kind of work must be carried out, do not do it yourself

but ask a qualified installer or a qualified service person to do it for you.

not touch it yourself but contact a qualified installer or a qualified service person.

unit and result in injury.

it may cause imperfect combustion.

Poor ventilation may causes oxygen shortage.

Doing so may result in deteriorated physical condition and ill health.

Doing so may result injury as the fan is rotating at high speed inside the unit.

properly as a refrigerant leakage may be the cause. Confirm the repair details with a qualified service person when

the repair includes additional charging of the refrigerant.

Operation

• Before opening the intake grille of the indoor unit set the circuit breaker to the OFF position. Failure to set the circuit

• Inside the air conditioner are high-voltage areas and rotating parts. Due to the danger of electric shocks or of your

• Do not move or repair any unit by yourself. Since there is high voltage inside the unit, you may get electric shock

• Use of a stand more than 50 cm high to clean the filter of the indoor unit or to carry out other such jobs constitutes

• Do not touch the aluminum fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched, do

• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor

• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise

• When the air conditioner is operated with a combustion appliance in the same place, ventilate the room adequately.

• When the air conditioner is used in a closed room, ventilate the room. Poor ventilation may causes oxygen shortage.

• Do not expose your body to cool air directly for a long time and do not cool yourself excessively.

• Do not insert your finger or a stick into the air intake or outlet.

Otherwise, injury may result as the fan is rotating at high speed inside the unit.

• Consult the shop where you purchased the air conditioner if air conditioning (cooling and heating) is not performed

• Stop running the air conditioner and turn off the breaker before cleaning.

Repairs

air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person. Take steps to

are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not touch the

service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to

ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until qualified

escalate or result in electric shocks or other failure.

qualified service person to have the repairs done. Do not set the circuit breaker to the ON position until the repairs are

completed.

and contact a qualified installer or a qualified service person to refit the unit. Do not set the circuit breaker to the ON position

until the unit has been refitted.

OFF position, and contact a qualified installer or a qualified service person to have the improvements or refitting done. Do

• If there is any kind of trouble (such as when check code display has appeared, there is a smell of burning, abnormal sounds

• If the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a

• If there is a danger of the indoor unit’s falling, do not approach the indoor unit but set the circuit breaker to the OFF position,

• If there is a danger of the outdoor unit’s toppling over, do not approach the outdoor unit but set the circuit breaker to the

not set the circuit breaker to the ON position until the improvements or refitting is completed.

– 74 –

person. Failure to relocate the air conditioner properly may result in electric shocks and/or a fire.

Relocation

• When the air conditioner is to be relocat ed, do not relocate it yourself but contact a qualified installer or a qualified service

• Do not customize the unit. Doing so may result in fire, electric shock or other failure.

3-EN 4-EN



Display

section

Operation

section

VENT

ON / OFF

TEMP.

MODE

FAN

TIMER SET

UNIT LOUVER

SAVE

SWING/FIX

TIME

SET

TEST

RESET

FILTER

TEST run indicator

Displayed during test run.

7 1

–3–

Part names and functions of the remote

control

Display section

switch is turned on.

control after has disappeared.

NOTE

All indicators are displayed in the display example below.

Actually, only the selected options will be displayed.

• blinks on the display of the remote control the first time the power

• The initial settings progress while is blinking. Start to use the remote

The LCD may temporarily be blurred due to static electricity.

Air intake port

Intakes the outside air

with the inlet flange.

Ground screw

It is included in the electrical control box.

SETTING indicator

Displayed when setting the timer or other

functions.

Operation mode indicator

Indicates the operation mode selected.

Check code indicator

Displayed when the protective device activates or

a problem occurs.

Time display

Indicates time concerning the timer.

(Indicates a check code when a problem occurs)

Timer mode indicator

Displays the timer mode.

Filter indicator

Reminder to clean the air filter.

Air supply port

Cools / heats the outside air and

Part names

sends it into the room with the

Outside Air Unit



air supply flange.

Blow temp. sensor

– 75 –

Drain pan

5-EN 6-EN



MODE

ON / OFF

FAN

TIMER SET

TEMP.

Operation section

Once the settings have been configured, all you need to do is push the button from then on.

SAVETIME VENT

UNIT LOUVER

SWING/FIXCLSET

TEST

FILTER

RESET

6 7

button (Unit / Louver select button)

button (Operation mode select button)

UNIT LOUVER

Selects desired operation mode.

UNIT button:

No function.

button (Timer set button)

button (Fan speed select button)

Only “High” is displayed.

Use to setup the timer.

button

LOUVER button:

No function.

Adjusts the set temperature.

button (TEST button)

button

Use only for service.

(During normal operation, do not use this button.)

or TEMP.

Select the desired set point by pushing TEMP.

OPTION:

Remote control sensor

Normally the temperature sensor of the indoor unit

senses the temperature. The temperature around the

remote control can also be sensed. For details, contact

your dealer.

“ ” appears on

button.

the remote control display after pushing the

button (Filter reset button)

Resets “ FILTER” indication after cleaning.

Use when a ventilator (commercially-available) is

No ventilator is connected if

connected. Push the button to turn ON/OFF the

ventilator. Turning ON/OFF the air-conditioner

also turns ON/OFF the ventilator.

button

button (Power save operation)

SWING/FIX

No function.

Operation lamp

Lights up during running.

button

Blinks when a problem occurs or the protective

device activates.

Turns on the unit when pushed, and turns off when

pushed again.

7 1

Service display

Displayed while the protective device works or a

problem occurs.

–4–

Set temperature display

The selected set temperature is displayed.

Remote control sensor indicator

Displayed when the remote control sensor is used.

Pre-heat indicator

– 76 –

Displayed when the heating mode is energized or

defrost cycle is initiated.

While this indication is displayed, the indoor fan

stops or operate in fan mode.

No function indicator

Displayed when the function requested is not

available on that model.

Fan speed indicator

Fan speed is fixed and the indicator is fixed to

“High”.

Central control indicator

Displayed when the air conditioner is controlled

centrally and used with central control devices

such as the central remote control.

If the use of the remote control is prohibited by the

central control, blinks when the ON/OFF,

MODE, or TEMP. button on the remote control is

pushed, and the buttons do not function. (Settings

that can be configured on the remote control differ

depending on the mode of the central control. For

details, read the Owner’s Manual of the central

remote control.)

Operation mode controlled indicator

Displayed when MODE button is pushed while

operation mode is fixed to cool or heat by the air

conditioner administrator.

Operation ready display

This display appears on some models.

7-EN 8-EN



CoolingFan

Automatic COOL

operation starts

+5.4

Fan

–5–

Operation mode and function

COOL : Cools the outside air and sends it into the room

HEAT : Heats the outside air and sends it into the room

FAN : Sends the outside air as it is

The air conditioner with the Outside Air Unit controls temperature of the supply air so that it is close to the setup

temperature of the remote control.

However temperature of the supply air may not be close to the setup temperature according to temperature of the

• The air conditioner with the Outside Air Unit cannot control the room temperature.

• For control of the room temperature, an indoor unit for air conditioning is required separately.

REQUIREMENT

outside air or the operation condition of the indoor units for air conditioning in one line.

Setup temp.

41 115

14 32 50 68 86 104 122

COOL mode

Use conditions

In COOL mode, if temperature of the outside air is under the setup temp. +5.4°F, FAN status is automatically made.

When temperature of the outside air is under 66 °F, FAN status is also made regardless of the setup

temperature.

•

Case to use in SMMS-e

In HEAT mode, if temperature of the outside air is over the setup temp. -5.4°F, FAN status is automatically made.

When temperature of the outside air is over 59°F, FAN status is also made regardless of the setup temperature.

•

Outdoor Air Temperature °F

Setup temp.

23 109

64 °F

-5.4

Heating

Automatic HEAT

operation starts

HEAT mode

protect the equipment.

When operating the air conditioner with the outside air temp. under 23 °F (minimum 5 °F), set temp. of the outside

air to be taken in to 23 °F or upper using a duct heater (locally procured).

order to protect the equipment.

In this case, continue the operation by selecting “HEAT” mode.

• In “COOL” or “FAN” mode, if temperature of the outside air is under 41 °F, the operation stop automatically in

REQUIREMENT

• In “HEAT” mode, if temperature of the outside air is under 23 °F, the operation stops automatically in order to

For details, consult the dealer which you purchased the air conditioner.

Basic operation

When you use the air conditioner for the first time or change the settings, follow the procedures below.

From next time, pushing the button starts running of the air conditioner with the chosen settings.

Preparation



Turn on the power switch

• When turned on, the separation line appears and blinks on the remote control display.

• Keep the power switch turned on during use.

REQUIREMENT

* The remote control will not work for about 1 minute after turning on the power. This is not a malfunction.

61 to 80 °F

Setting range Factory default

HEAT 77 °F

Push the button to stop running.

The operation lamp turns off.

Changing the set temperature

Push the “TEMP. ” buttons.

Push to increase the temperature, and to

decrease the temperature. (The set temperature

cannot be changed in the fan mode.)

Operation mode

COOL

NOTE

When heating

The air conditioner may continue running in the fan

mode for about 30 seconds after stopping heating.

VENT

MODE

FAN

TIMER SET

SAVE

TIME

UNIT LOUVER

SWING/FIX

SET

TEST

RESET

FILTER

button.

Push the

The operation lamp lights up.

Push the “MODE ” button to select a

operation mode.

Each time you push the button, the operation

mode and its icon change in the following order:

ON / OFF

TEMP.

before starting running.

• When you resume using the air conditioner after a long period of disuse, turn on the power switch at least 12 hours

Operations

– 77 –

Fan

Cool

Heat

• Fan speed is fixed and the indicator is fixed to

“High”.

9-EN 10-EN



Installation

Location

• Avoid locations where inside the ceiling is used as a route for outside air.

• Avoid installing near machines emitting high frequency waves.

• Not suitable for chemical plants such as liquefied carbon dioxide refrigerant plants.

adheres to or collects on the interior of the air conditioner, it may spontaneously combust and start a fire.

• Do not install the air conditioner in locations where iron or other metal dust is present. If iron or other metal dust

• Areas with large amount of oil droplets (including machine oil) or vapors

• Salty areas near oceans, etc.

• A failure may occur in certain locations such as the following:

• Hot springs emitting sulfidizing gas, etc.

• Heavily acidic or alkaline places.

Special maintenance or parts are required for use in the above places. For details, contact the dealer where you

purchased the product.

restricted.

• Leave an enough space around the air intake and discharge of the outdoor unit so that the ventilation is not

)

• 34 hours (*

• Avoid places where strong wind may blow against the air intake and discharge of the outdoor unit.

• Attach a snow stand, snow hood, etc. to the outdoor unit for use in snowfall areas. For details, contact the dealer

indicates 1 day

(24 hours).

indicates 10 hours.

where you purchased the product.

Hours

Days

(Total: 34 hours)

• Make sure drain water from the outdoor unit is emitted into places with good drainage.

• Make sure the long life prefilter and high-efficiency filter are installed in the filter chamber. If the long life prefilter

observe this precaution may cause visual disturbance or noise.

and high-efficiency filter are not attached, heat exchangers etc. clogged with dust can result in water leakage.

Attach the long life prefilter and high-efficiency filter because dust can also get into the area being air conditioned.

the alarm may not work properly or detect fire in case of fire.

• Keep a distance of at least 39.4" between the air conditioner / remote control and a TV or radio. Failure to

• Leave a distance of at least 59.1" between the air discharge and a fire alarm. If this precaution is not observed,

disappears, the time indication is

displayed, and or

display flashes.

(When using the ON timer, all indications other

Push the button.

than the time and turn off.)

Be careful of operation sounds

Cancelling the timer

• Locate the unit in a place secure enough so that the sounds and vibrations do not increase.

• If something is placed near the air discharge of the outdoor unit, noise may increase.

Push the button.

The timer indicator disappears.

• Be careful not to disturb your neighbors with cool / warm air or noise coming from the air discharge of the outdoor

NOTE

unit.

SWING/FIX

button after stopping by the timer starts running again

and the timer will stop the running again after the

specified period.

temporarily disappears for about 5 seconds by

pushing the button. This occurs due to the

processing in the remote control, and is not a

• When using Repeat OFF timer, pushing the

malfunction.

• When using OFF timer, the timer indication

–6–

Timer operation

On timer : Starts running after the specified period.

Setting the timer



OFF timer : Stops running after the specified period.

Repeat-OFF timer : Stops running after the specified period every time you use the air conditioner.

Select a timer type from the following three: (Max. 168 hours)

Push the button.

Each time you push the button, the timer mode

Off

No indication (Timer

function is deactivated)

Off

and indication change in the following order:

(Off timer) (On timer)(Repeat Off timer)

• and the time indicator blink.

minute) increments each time you push .

The setting increases in 1-hour increments if it is

over 1d (24 hours). The maximum is 7d (168

hours).

On the remote control, settings between 0.5h

and 23.5h (*1) are displayed as is.

If it is over 24 hours (*2), the days and hours

Push the buttons to set the period of

time until the timer actions.

• The time setting increases in 0.5-hour (30-

appear.

minute) decrements (0.5 hours to 23.5 hours) or

1-hour decrements (24 hours to 168 hours)

each time you push .

• The time setting decreases in 0.5-hour (30-

– 78 –

)

Example of remote control display

• 23.5 hours (*

11-EN 12-EN



ON / OFF

MODE

FAN

TIMER SET

VENT

SAVE

TIME

UNIT LOUVER

SWING/FIX

SET

–7–

Maintenance

WARNING

For daily maintenance including Air Filter cleaning, make sure to ask the qualified service person particularly

following models as the maintenance requires high-place work;

CAUTION

Do not push buttons with wet hands.

Doing so may result in electric shock.

Cleaning the air filters (All filters are to be procured locally.)

• When the filter indicator is displayed on the remote control, clean the air filters.

• Ask qualified service person to clean the filters for the models listed in the warning on the top of this chapter.

• Clogged filters may lower the cooling and heating performance.

TEMP.

disappears.

The “ FILTER” indicator

TEST

RESET

FILTER

When the cleaning is complete, push the

“ FILTER RESET” button.

The protective device may activate in the following

cases:

During cooling

unit is blocked.

discharge of the outdoor unit.

• When the air intake or air discharge of the outdoor

• When strong wind blows continuously against the air

During heating

filter of the indoor unit.

• When dust or dirt is excessively adhered to the air

NOTE

When the protective device activates, turn off the power

• When the air discharge of the indoor unit is blocked.

switch, remove the cause, and then restart running.

Cooling / Heating operations

Each unit can be controlled individually. However,

indoor units connected to the same outdoor unit cannot

perform cooling and heating simultaneously.

When you attempt simultaneous operation, indoor

units performing cooling are stopped, and the running

preparation indicator is displayed on the remote

control.

Notes on operations and performance

Check before operation



starting operation.

• Turn on the power switch at least 12 hours before

• Make sure the ground wire is securely connected.

Defrosting during heating

defrosting is automatically performed (for

approximately 2 - 10 minutes) to increase the

heating effect.

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

• If frost falls on the outdoor unit during heating,

• The fan of the indoor unit is stopped during

defrosting.

3-minute protection

The outdoor unit will not operate for approximately 3

minutes after the air conditioner has been immediately

restarted after stopping, or the power switch has been

– 79 –

Power failure

turned on. This is to protect the system.

• In the case of a power failure, all operations stop.

• To resume operations, push the ON/OFF button.

An indoor unit performing heating continues running.

When you attempt an operation without the configured

settings, the running preparation indicator is

displayed on the remote control and operation stops.

If operation is fixed to cooling or heating by the air

conditioner administrator, only the configured settings

apply to the operation.

When the outside temperature increases, the outdoor

unit may stop.

Information on the air

Characteristics of heating

conditioning control system

80 °F.

• The temperature setting should be between 61 and

• The temperature of the air conditioning system can

be set outside of the range of 61 to 80 °F; however,

it may interfere with the temperature adjustment of

the indoor unit for air conditioning or may cause the

Protective device

(High pressure switch)

The high pressure switch stops the air conditioner

automatically when excessive load is applied to the air

conditioner.

If the protective device activates, the unit’s running

stops and the operation lamp blinks.

When the protective device activates, the indicator

and the check code are displayed on the remote

control.

13-EN 14-EN

device to fail.



Symptom Cause

• Fan of the outdoor unit stops automatically and performs defrost

• White misty cold air or water

operation.

is out.

the operation has stopped, a sound such as water flows may be heard,

and the operation sound may become larger for 2 or 3 minutes

immediately after the operation has started.

• Solenoid valve works when defrost operation starts or finishes.

leak is heard.

• Sometimes, noise of air

They are flowing sound of refrigerant or draining sound of dehumidifier.

• When the operation has started, during the operation, or immediately after

• “Swish” sound is heard

• This is sound generated when heat exchanger, etc. expand and contract

sometimes.

• Slight clacking sound is

Troubleshooting

Outdoor unit

When the following symptoms are found, check the points described below before asking repair servicing.

slightly due to change of temperature.

heard.

• “ ” indication is lit. • When cooling operation cannot be performed because another indoor unit

performs heating operation.

or HEAT, and an operation contrary to the setup operation is performed.

• Is outdoor temperature out of operation temperature range?

• “ ” indication is lit. • When the manager of the air conditioner has fixed the operation to COOL

Indoor unit

It is not a failure.

• Since refrigerant is flowed temporarily to prevent stay of oil or refrigerant

• “ ” indication is lit. • When stopping the fan to prevent cool air blow at starting heating.

• Sound or cool air is output

in the stand by indoor unit, sound of flowing refrigerant, may be heard or

white steam when other indoor unit operates in HEAT mode, and cold air

in COOL mode may be blow-out.

• Sound is generated when the expansion valve operates when power has

from the stand by indoor

unit.

• When power of the air conditioner is

been turned on.

• Is the timer “ON” or “OFF”?

•Is it a power failure?

turned on, “Ticktock” sound is heard.

Operates or stops automatically.

• LCD blurs when it is touched. • LCD may temporarily blur by static electricity.

• Is the power switch turned off?

• Is the power fuse or breaker blown?

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

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

• Are COOL and HEAT selected simultaneously?

Does not operate.

(“ ” indication is lit on the display of the remote control.)

The operation is automatically stopped (“ ” on the remote control display

turns on).

cooling and heating? The operation is automatically switched to the fan

• Is the outside air temperature outside of operating temperature range?

Check again.

mode.

• Is the outside air temperature outside of operating temperature range for

If only fan operation is per formed:

–8–

Cleaning the indoor unit and

remote control

for the models listed in the warning on the top of this

• Ask qualified service person to clean the indoor units

chapter.

• Wipe with a dry, soft cloth.



chemical cloth, etc. as those may cause deformation

• Do not use benzine, thinner, scouring powder,

or breakage.

If unused for over a month

• Leave the fan on for half a day or so to dry the inside.

• Turn off the main power switch.

• Clean the air filter and then attach it.

– 80 –

Periodic inspection

• After being used for a long period of time, the parts

may deteriorate or malfunction, or the drainage may

worsen, due to heat, moisture, dust, or general

Ask a qualified service person to clean the drain

pan.

CAUTION

Clean the drain pan

Without cleaning, the drain pan may be filled with waste,

and water may overflow onto the ceiling or floor.

15-EN 16-EN

Before the cooling / heating

usage.

that you have a inspection (charges apply)

performed by the dealer where you purchased the

unit, etc.

• In addition to the maintenance, it is recommended

season

–9–

LOUVER

MODE

TIMER SET

UNIT

WING/FI

TEST

RESET

Indoor unit No. in which a

problem occurred

Check code

ON / OFF

] button used to set temperature, the check code log stored in memory is

on the remote control are flashing. When and a combination of , , , , or

in UNIT No.

displayed in order.

The numbers in CODE No. indicate CODE No. [01] (latest) to [04] (oldest).

CAUTION

When pushing and buttons at the same time for 4

seconds or more, the following display appears.

If [ Service check] is displayed, the mode enters in the check

code log mode.

• [01 : Order of check code log] is displayed in CODE No. window.

• [Check code] is displayed.

• [Indoor unit address in which a problem occurred] is displayed

Every pushing of [ /

CAUTION

If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer:

• Switch operation does not work properly.

• The main power fuse often blows out, or the circuit breaker is often activated.

and a number are displayed on the remote control, also inform a qualified service person of the display content.)

(The operation lamp and

• A foreign matter or water fall inside the air conditioner.

• When the air conditioner does not operate even after the cause of the protective device activation has been removed.

• Any other unusual conditions are observed.

Confirmation and check

When a problem occurred in the air conditioner, the check code and

the indoor unit No. appear on the display part of the remote control.

The check code is only displayed during the operation.

If the display disappears, operate the air conditioner according to the

following “Confirmation of check code log” for confirmation.

Confirmation of check code log

When a problem occurred on the air conditioner, the

check code log can be confirmed with the following

procedure. (The check code log is stored in memory up

to 4 check code.)

The log can be confirmed from both operating status

and stop status.

Procedure Description

– 81 –

Do not push button because all the check code log of the indoor unit will be deleted.

After confirmation, push button to return to the usual display.

1. Check the check code according to the above procedure.

2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the air conditioner.

3. More details of the check code are explained in Service Manual.

17-EN 18-EN

WARNING

CAUTION

12. INSTALLATION MANUAL

to the terminals from affecting the terminals.

compressor before disconnecting the refrigerant pipe.

If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air

and the refrigeration cycle is overpressurized, which may cause a burst or injury.

position.

Otherwise, electric shocks may result.

for some reason, first put on protective gloves and safety work clothing, and then proceed.

strength is not enough, the unit may fall down resulting in injury.

local regulations and laws.

wire is extended may give rise to smoking and/or a fire.

not know where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has

• Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces applied

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

• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the

• Before carrying out the installation, maintenance, repair or removal work, set the circuit breaker to the OFF

• Do not touch the aluminium fin of the unit. You may injure yourself if you do so. If the fin must be touched

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

• The unit can be accessed from the service panel.

• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the

• Install the circuit breaker where it can be easily accessed by the agent.

occurred in the air conditioner.

• Under no circumstances the power wire must not be extended. Connection trouble in the places where the

• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does

approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also

been changed. Therefore, during insta llation work, be sure that water, dust, former refrigerant, or refrigerating oil do es

not enter the refrigerating cycle.

the main unit and installation tools are changed from those for the conventional refrigerant.

enter.

Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in

• This air conditioner adopts the new HFC refrigerant (R410A) which does not destroy ozone layer.

• The characteristics of R410A refrigerant are; easy to absorb water, oxidizing membrane or oil, and its pressure is

• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of

• Accordingly the exclusive tools are required for the new refrigerant (R410A).

• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not

refrigerant leakage.

• Tighten the flare nut with a torque wrench in the specified manner.

• Wear heavy gloves during the installation work to avoid injury.

–2–

1 Precautions for safety

Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,

electrical components, and equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.

Untrained personnel can perform basic maintenance functions such as cleaning indoor unit air filter. All other

operations should be performed by trained service personnel.

Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached

to the equipment.

Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky

equipment.

Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the

unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety

information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and

CAUTION. These words are used with the safety--alert symbol.

DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING

signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which

may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which

will result in enhanced installation, reliability, or operation.

The manufacturer shall not assume any liability for the damage caused by not observing the description of this

manual.

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

• Only a qualified installer or service person is allowed to do installation work.

– 82 –

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.

Incomplete grounding may cause an electric shock.

Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.

Failure to do so may cause electric shock.

If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and

the refrigeration cycle is overpressurized, which may cause a burst or injury.

other than the specified refrigerant into the refrigeration cycle.

If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high

and it resultingly causes pipe burst and injuries on persons.

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

concentration of refrigerant leakage occur in the room does not exceed the critical level.

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

If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you

may contact with revolving fan or active electricity.

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

If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might

generate.

an exclusive power supply for the air conditioner at the rated voltage.

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

• Connect ground wire. (grounding work)

• Turn off all the circuit breaker before attempting any electrical work.

• Install the refrigerant pipe securely during the installation work before operating the air conditioner.

• When moving the air conditioner for the installation into another place, do not enter any gaseous matter

• Perform installation work properly according to the Installation Manual.

• When the air conditioner is installed in a small room, provide appropriate measures to ensure that the

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

• Install the air conditioner at a height 8’ (2.4 m) or more from the floor.

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

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

• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Use

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

3-EN 4-EN

–3–

NOTE



CORRECT

Height difference:

1.97" (0.5 m) or more

Connection which stretches over two floors is

unavailable units

(

)

System able to be combined

3 System control of Outside Air Unit

The Outside Air Unit is connectable to SMMS (Super Modular Multi system).

However this is not connectable to SHRM (Super Heat Recovery Multi system).

Keep the height difference between the Outside Air Units to 1.97" (0.5 m) or less.

AP048 type: 4 pieces, 3.2" (80 mm) AP072, 096 type: 4 pieces, 5.5" (140 mm)

For heat insulation of hanging bracket

Part name Q’ty Shape Usage

Owner’s Manual 1 — (Be sure to hand over to customers)

2 Accessory parts

Installation Manual 1 This manual This manual for installer.

1 For heat insulation of Gas pipe connecting section

1 For heat insulation of Liquid pipe connecting section

Heat insulator

The wired remote control must be connected. Settings cannot be made for systems without remote controls.

– 83 –

5-EN 6-EN



REQUIREMENT

Unit: in (mm)



7.9" (200) or more

Electrical control box

Check port

39.4" (1000) or more

23.6"

(600)

7.9" (200)

23.6" (600)

2.0" (50)

or more

3.9" (100) or more

Service panel

Duct

conditioner, which come to contact with the high-humidity atmosphere.

In this case, arrange the side plate (Service panel) so that it is easily removed.

the duct.

Installation space

Keep the space necessary for installation and service.

The check port should be 23.6" × 23.6" (600 × 600 mm).

Installation under atmosphere of the high humidity

Although it has been confirmed that no trouble occurs on the unit, there is a fear of drip of the water if operation

under high humidity condition continues.

Installation to inside of the ceiling with tiles on the roof.2Installation to inside of the ceiling with slated roof.3Installation to inside of the ceiling with kitchen.

In some cases including the rainy season, especially inside of the ceiling may become high-humidity atmosphere

(dew-point temperature: 86 °F (30 °C) (humidity: 80%) or higher).

• In the above cases, additionally attach the heat insulator (Glass wool, etc.) to all positions of the air

• Apply also heat insulating a sufficient thickness 0.39" (10 mm) or more to the duct and connecting part of

–4–

Blocked filters may cause the air conditioner’s performance to deteriorate, condensation to form, the plastic parts

pharmaceuticals are made and places where the exhaust air from combustion appliances will be sucked into the

unit).

Doing so may cause the heat exchanger (its aluminum fins and copper pipes) and other parts to become

corroded.

Doing so may cause the heat exchanger to become corroded, mists caused by the blockage of the heat

exchanger to be generated, the plastic parts to be damaged, the heat insulators to peel off, and other such

4 Selection of installation place

Avoid installing in the following places.

Select a location for the indoor unit where the cool or warm air will circulate evenly.

Avoid installation in the following kinds of locations.

• Locations where inside the ceiling is used as route for outside air.

• Saline area (coastal area)

• Locations with acidic or alkaline atmospheres (such as areas with hot springs, factories where chemicals or

problems to result.

• Locations with atmospheres with mist of cutting oil or other types of machine oil.

• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior

of the air conditioner, it may spontaneously combust and start a fire.

• Locations where vapors from food oils are formed (such as kitchens where food oils are used).

to be damaged, and other such problems to result.

be disrupted (a disruption of the air flow may cause the air conditioner’s performance to deteriorate or the unit to

• Locations near obstructions such as ventilation openings or lighting fixtures where the flow of the blown air will

The power line frequency and voltage may fluctuate, and the air conditioner may not work properly as a result.

shut down).

• Locations where an in-house power generator is used for the power supply.

– 84 –

instruments or art works).

• On truck cranes, ships or other moving conveyances.

• The air conditioner must not be used for special applications (such as for storing food, plants, precision

(The quality of the items stored may be degraded.)

equipment or communication equipment).

(Malfunctioning or control trouble in the air conditioner or noise may adversely affect the equipment’s operation.)

(If the drain has become blocked or when the humidity is over 80%, condensation from the indoor unit will drip,

• Locations where high frequencies are generated (by inverter equipment, in-house power generators, medical

possibly causing damage to anything underneath.)

• Locations where there is anything under the unit installed that would be compromised by wetness.

• Locations where organic solvents are being used.

• The air conditioner cannot be used for liquefied carbonic acid cooling or in chemical plants.

• Location near doors or windows where the air conditioner may come into contact with high-temperature, high-

humidity outdoor air.

(Condensation may occur as a result.)

• Locations where special sprays are used frequently.

7-EN 8-EN

WARNING

REQUIREMENT



(Hanging bolt pitch)

4-M0.4" (10) hanging

bolt (Locally procured)

50.7" (1288) (Hanging bolt pitch)

Electrical

control

box

3.4" (87)

52.3" (1328)

Refrigerant pipe connecting port

(Liquid side) C

Drain pipe connecting port

Refrigerant pipe connecting port

(Gas side) D

19.5" (496)

2.6"

(66)

8.6"

(218)

5.9"

(150)

1.9"

(49)

49.8" (1266)

0.7" (18)

2.4" (60)

27.5" (699)

33.3"(845)



REQUIREMENT

Use a hole-in anchors, hole-in

Reinforcing

steel

Anchor bolt

(Blade type

bracket)

(Slide type

bracket)

(Pipe hanging

anchor bolt)

Hanging bolt

Support angle

Hanging bracket

Heat insulator

(Accessory)

* Note that the widths of the

AP048, AP072 and AP096

models are different.

Heat insulator

(Accessory)

Hanging bracket

plugs, or a hole-in bolts.

Use existing angles or install new

support angles.

New concrete slab Steel flame structure Existing concrete slab

Treatment of ceiling

The ceiling differs according to structure of building.

For details, consult your constructor or interior finish contractor.

In the process after the ceiling board has been removed, it is important to reinforce ceiling foundation (frame) and

–5–

Installation of hanging bolt

to keep horizontal level of installed ceiling correctly in order to prevent vibration of ceiling board.

Use 3/8" (M10) hanging bolts (4 pcs, locally procured).

Matching to the existing structure, set pitch according to size in the unit external view as shown below.

Install the bolts with insert brackets or anchor

bolts.

Hanging up of unit

• Adjust the nut position (lower side).

• Hang up the main unit by hanging nut of hanging bolt to T groove of hanging bracket of the indoor unit.

• Using the level vial, etc., check that four sides are horizontal. (Horizontal degree: within 0.2" (5 mm))

does not travel to the duct or ceiling. Attach also acoustic-absorption material to the inner liner of the duct and

• Attach canvas ducts (locally procured) to the air intake and the air discharge so that vibration of the main unit

Unit: in (mm)

the vibration-proof rubber to the hanging bolt.

• Using a level vial, etc., confirm the horizontal level of the indoor unit.

• Tighten the nut sufficiently, and fix it securely.

5 Installation

55" (1398) 49.6" (1260) Ø1/2" (12.7) flare Ø7/8" (22.2) brazing

AP048∗ 35.4" (898) 32.2" (818) Ø3/8" (9.5) flare Ø5/8" (15.9) flare

AP072∗

AP096∗

If carrying in the indoor unit unpacked by necessity, be sure to use buffering cloth, etc. to not damage the unit.

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

Install the air conditioner certainly to sufficiently withstand the weight.

If the strength is insufficient, the unit may fall down resulting in human injury.

Perform a specified installation work to guard against strong wind or earthquake.

An incomplete installation can cause accidents by the units falling and dropping.

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

• Do not put a heavy article on the indoor unit. (Even units are packaged)

• Carry in the indoor unit as it is packaged if possible.

• To move the indoor unit, hold the hooking metals (4 positions) only.

before using it.

• Carry the package by two or more persons, and do not bundle it with PP band at positions other than specified.

• Use a forklift to transport materials. Do not drag or push the package because it is made of cardboard.

• If the vibration insulator is applied to the hanging bolt, make sure it does not cause larger vibration in the main unit

External view

Installing the four 3/8" (M10)-diameter hanging bolts

• Space the hanging bolts according to the dimensions shown in the diagrams below.

– 85 –

• Use 3/8" (M10)-diameter hanging bolts (Required at the site).

Model MMD-ABCD

outdoor units, central control system wire and remote control cord up to the positions where pipes and wires are

Considering piping and wire connecting works in the ceiling after hanging down the indoor unit, select an

installation place and then determine the drawing-out direction of the pipes.

• If the ceiling has been already set, draw the refrigerant pipe, drain pipe, inter-unit wire between indoor and

connected before hanging down the indoor unit.

9-EN 10-EN



REQUIREMENT

Hanging bolt

Nut (Upper side)

Washer (Upper side)

Heat insulator

(Hanging bracket main unit)

Washer (Lower side)

Nuts (Lower side)

Main unit

Level vial

Install the main unit within 0.2" (5 mm) w hile lowering the

drain pipe connecting port side slightly.

0.2" (5 mm)

or less

Water pouring

Level vial

Vinyl hose

± 0.2" (5 mm)

Install both air intake and air supply port sides

within ± 0.2" (5 mm).

CAUTION

REQUIREMENT



Be sure to apply heat insulation to the duct to prevent dewy condition.

6 Duct work

If there is an incomplete duct work, the water leakage into the room may happen.

the filter chamber to remove dust. Send outside air to the inside of the indoor unit and the area being air conditioned.

exposed to outdoors and therefore rainwater, leaves and birds are easy to enter in if it is set horizontally.

Attaching wire netting and others to end of the suction duct is also recommended.

Be sure to apply heat insulation for the duct to prevent dewing.

(Recommended material: Glass wool or foam polyethylene, Thickness: 1.0" (25 mm))

To avoid spread of the fire, cover the duct with iron plate, etc.

sound and also to make easy the disassembly of the main unit in service time.

If connecting the ducts directly to the main unit, the duct vibration abnormal sound from the main unit may happen,

each other.

• If no air filter is installed, dust will collect in the heat exchanger, which may cause the air conditioner to fail or to leak.

• Be sure to set the duct at air intake side with descending inclination because the suction duct of the this unit is

• Connect the duct so that the air intake sucks outside air only.

• When welding the duct at the site, sparks may enter in the air filter or heat insulator.

• When penetrating metal lath, wire lath or metal plank with the metal duct, isolate the duct from the wall electrically.

• In order to prevent short circuits, design the duct work so that the intake and discharge openings are not adjacent to

• Install the filter chamber on the intake side of the indoor unit. Attach the long life prefilter and high-efficiency filter to

• Set the canvas ducts at air intake port and air supply port. It is to avoid conveyance of vibration, abnormal resonance

and also the filter and service panel cannot be detached.

• Connect the ducts so that the ducts do not weight on the main unit.

• Be sure to fix the ducts by using the hanging bolts.

Duct work

After installing the product, perform the duct work according to the working diagram.

–6–

Install temporarily the indoor unit.

Attach the hanging bracket to the hanging bolt.

Be sure to fix the hanging bracket from both up and down sides of the hanging bracket by using the nuts

(3/8" (M10) locally procured) and the washer.

Installation of indoor unit

Using nut, adjust height of the main unit.3Check the main unit is horizontally installed.

Attach canvas ducts (locally procured) to the air intake and the air discharge so that vibration of the main unit

Front view Side view

does not travel to the duct or ceiling.

Attach also acoustic-absorption material to the inner liner of the duct and the vibration-proof rubber to the

hanging bolt.

– 86 –

Make sure that the unit is hanging level.

If it is hung horizontally, the drain pan may overflow. Install the unit within the dimensions indicated below.

Using a level vial or vinyl hose, check whether the indoor unit is hung horizontally or not.

11-EN 12-EN

–7–



REQUIREMENT

42.6" (1083)

25.6" (650) (2.6" × 10 (65 × 16))

2.6" (65)

1.8"

(45)

0.7" (19)

0.4" (9)

2.6" (65)

13.7" (347)

0.4" (9)

12.8" (325) (2.6" × 5 (65 × 5))

0.4" (9)

0.7" (19)

42.6" (1083)

40.9" (1040) (2.6" × 16 (65 × 16))

2.6" (65)

1.8"

(45)

0.7" (19)

0.4" (9)

2.6" (65)

13.7" (347)

0.4" (9)

12.8" (325) (2.6" × 5 (65 × 5))

0.4" (9)

0.7" (19)

23.0" (583)

20.5" (520) (2.6" × 8 (65 × 8))

2.6" (65)

2.2"

(55)

0.7" (19)

0.4" (9)

2.6" (65)

15.1" (383)

1.1" (28)

12.8" (325) (2.6" × 5 (65 × 5))

0.4" (9)

0.7" (19)

42.6" (1083)

40.9" (1040) (2.6" × 16 (65 × 16))

2.6" (65)

1.8"

(45)

0.7" (19)

0.4" (9)

2.6" (65)

15.1" (383)

1.1" (28)

12.8" (325) (2.6" × 5 (65 × 5))

0.4" (9)

0.7" (19)

Wall

*1: Locally procured

Check port

(23.6" × 23.6" in

(600 × 600 mm))

Heat insulator *1

Canvas duct *1

Product main unit

Air supply duct *1

Air supply flange

Air intake flange

Filter chamber *1

Canvas duct *1

Hood

(with wire netting)

Air intake duct

Descending

inclination

High-efficiency filter *1

Long life prefilter *1

Heat insulator *1

Wrap aluminum tape around connecting part between the air intake port flange and duct, or provide sealer

so that air does not leak.

Air intake duct

• Connect the air intake duct (Locally procured) to the inlet flange.

And attach wire netting, etc. to the air intake of the hood.

• For the outside air intake port, attach a hood so that outside air is sucked from lower side.

• Set the air intake duct at descending inclination so that water can be drained even if rainwater enters in.

• Wrap the outside of the intake duct with heat insulator because it intakes cold air while heating.

Air supply duct

Connect the air supply duct (Locally procured) to the Air supply flange.

Wrap aluminum tape around connecting part of the air supply port flange and duct or apply packing so that air

does not leak.

<MMD-AP072 type, AP096 type>

Connecting flange

Refer to size in the figure attached to the main unit.

<MMD-AP048 type>

If the air conditioner unit and the canvas joint are connected with the rivets, the fan and the refrigerating cycle cannot

be checked.

Be sure to use the flange as shown in the above and tighten it by the bolts.

– 87 –

(Fixing bolts 0.2" x 0.5" (6 x 12 mm), locally procured)

13-EN 14-EN



REQUIREMENT

400 500 600 700

External static pressure (in WG)

Air flow rate (cfm)

Min 445 (cfm) Standard 636 (cfm) Max 700 (cfm)

Middle static

pressure tap

Low static pressure tap

High static pressure tap

400 500 600 700

External static pressure (in WG)

Air flow rate (cfm)

Min 445 (cfm) Standard 636 (cfm) Max 700 (cfm)

Low static

pressure tap

High static pressure tap

Middle static pressure tap

400 500 600 700

Fan motor current (A)

Middle static

pressure tap

High static pressure tap

Low static

pressure tap

Air flow rate (cfm)

400 500 600 700

Fan motor current (A)

Middle static

pressure tap

High static pressure tap

Low static

pressure tap

Air flow rate (cfm)

REQUIREMENT

600 900 1200

External static pressure (in. WG )

Air flow rate (cfm)

Min 693 (cfm) Standard 989 (cfm)

Max 1088 (cfm)

Middle static pressure tap

High static pressure tap

Low static

pressure tap

600 900 1200

External static pressure (in. WG)

Air flow rate (cfm)

Min 693 (cfm) Standard 989 (cfm)

Max 1088 (cfm)

Middle static pressure tap

High static pressure tap

Low static

pressure tap

600 900 1200

Fan motor current (A)

Air flow rate (cfm)

Middle static

pressure tap

High static pressure tap

Low static

pressure tap

2.2

2.4

2.6

2.8

3.2

3.4

3.6

3.8

600 900 1200

Fan motor current (A)

Air flow rate (cfm)

Middle static

pressure tap

High static pressure tap

Low static

pressure tap

<MMD-AP072 type>

(Standard air volume: 989 cfm, Lower limit air volume: 693 cfm, Upper limit air volume: 1088 cfm)

1-2. 230V Fan characteristics 2-2. 208V Fan characteristics

Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to

1-3. 230V cfm-A 1-3. 208V cfm-A

110% against the standard air volume.

–8–

Fan characteristics

7 Fan characteristics

<MMD-AP048 type>

(Standard air volume: 636 cfm, Lower limit air volume: 445 cfm, Upper limit air volume: 700 cfm)

1-2. 230V Fan characteristics 2-2. 208V Fan characteristics

1-3. 230V cfm-A 2-3. 208V cfm-A

– 88 –

Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to

110% against the standard air volume.

15-EN 16-EN

REQUIREMENT

800 1100 1400

External static pressure (in. WG)

Air flow rate (cfm)

Min 866 (cfm) Standard 1237 (cfm)

Max 1360 (cfm)

High static pressure tap

Low static pressure tap

800 1100 1400

External static pressure (in. WG)

Air flow rate (cfm)

Min 866 (cfm) Standard 1237 (cfm)

Max 1360 (cfm)

High static pressure tap

Low static pressure tap

800 1100 1400

Fan motor current (A)

Air flow rate (cfm)

High static pressure tap

Low static pressure tap

Fan motor current (A)

Air flow rate (cfm)

High static pressure tap

Low static pressure tap



REQUIREMENT

Terminal block No. Fan motor wiring Remarks

F1 F2 F3 F4

<MMD-AP048 type>

Black

Blue

Orange

Electrical control box

Fan motor

2P terminal block

4P terminal block

Control

P.C.

board

Lead wire for changing the external static pressure

When changing the external static pressure is

necessary, change connection of this lead wire.

Orange (at shipment of factory)

F1 F2 F3 F4 F1 F2 F3 F4

<MMD-AP072 type, AP096 type>

Black

Blue

Orange

Electrical control box

Fan motor

4P terminal block

2P terminal block

Control

P.C.

board

Lead wire for changing the external static pres sure

When changing the external static pressure is

necessary, change connection of this lead wire.

Orange (at shipment of factory)

Black

Blue

Orange

Fan motor

Terminal block No. Fan motor wiring Remarks

Wire connection change of fan motor

The motor wires for the fan have been connected to at shipment from the factory.

Change the wire connection if change of the external static pressure is required due to the duct resistance.

When the external static pressure was changed, enter the changed static pressure value in the identification plate of

the unit.

F1 (Low static pressure tap) Blue —

F2 (Middle static pressure tap) Orange At shipment from factory

<MMD-AP048, AP072 type>

F3 (High static pressure tap) Black —

F1 (-) Blue Not used.

<MMD-AP096 type>

F2 (Low static pressure tap) Orange At shipment from factory

F3 (High static pressure tap) Black —

–9–

3.6

3.8

2.833.2

3.4

800 1100 1400

2.2

2.4

2.6

<MMD-AP096 type>

(Standard air volume: 1237 cfm, Lower limit air volume: 866 cfm, Upper limit air volume: 1360 cfm)

1-2. 230V Fan characteristics 2-2. 208V Fan characteristics

1-3. 230V cfm-A 2-3. 208V cfm-A

– 89 –

Set a volume damper to the air supply duct, and then adjust the air volume so that it is kept in the range of 70 to

110% against the standard air volume.

17-EN 18-EN

CAUTION

REQUIREMENT



REQUIREMENT

4'11" to 6'7" (1.5 m to 2 m)

As long as possible

Up-down bend

Trap

VP-30

Descending slop of

1/50 to 1/100

Descending slop of

1/50 to 1/100

INCORRECT



REQUIREMENT

Service panel

Pour water into the drain pan using hose, etc.

Check the draining

Check the water drainage is surely performed at the test run. Check also no water leakage is found at the pipe

connecting part.

• Be sure to check draining even if installing the unit in heating season.

• Using a kettle or hose, pour water gradually from the drain pan at the air supply port.

–10–

Following the Installation Manual, perform the drain piping work that water is properly drained, and apply a heat

insulation not to cause a dew condensation.

8 Drain piping

Inappropriate piping work may cause the water leakage in the room and wet of furniture.

1/100 and do not make up-down or trap in the midway.

• The drain piping flows the natural drainage. Make sure to set the drain piping from the unit with descending slope of 1/50 to

• Set the horizontal pulling of the drain pipe to 65.7' (20 m) or less. When drain piping is too long, attach the support bracke t

at intervals of 4'11" to 6'7" (1.5 m to 2 m) to avoid the pipe becomes undulant as shown in figure below.

to prevent dew condensation. Especially a part where drain pipe is connected to the indoor unit must be firmly insulated with

• Be sure to connect the drain pipe to the air conditioner with adhesive to avoid water leakage from the joint portion.

• Condensation may occur on the drain pipes including collective pipes. All drain pipes must be wrapped with heat insulator

– 90 –

the provided heat insulator.

Hard vinyl chloride pipe socket for VP25

Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø1.3" (32 mm))

Pipe material, size and insulator

Pipe material

The following materials for piping work and insulating process are locally procured.

Connecting drain pipe

Insulator Foamed polyethylene foam, thickness: 0.4" (10 mm) or more

force on the connecting section until the adhesive agent dried.

• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.

• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any extra

19-EN 20-EN

CAUTION



Work using double spanner

CAUTION



CAUTION



CAUTION



REQUIREMENT

section of the indoor unit securely up to the root

Turn up pipe heat

insulator

Remove the all

brazed part.

Wet cloth

Remove the cap.

Connection pipe locally

procured Ø7/8" (22.2 mm)

Braze all around

Tie up with a banding band.

Indoor unit

Union

Heat insulation pipe

(Accessory)

Banding band

(Locally procured)

Heat insulator of

the pipe

Flare nut

without exposure of the pipe. (The pipe exposed to the

outside causes water leak.)

banding band.

• Turn back the pipe heat insulator and tie up with a

Airtight test / air purge, etc.

For air tightness test, adding refrigerant, refer to the

Installation Manual attached to the outdoor unit.

Do not supply power to the indoor unit until the airtight

test and vacuuming are completed. (If the indoor unit is

powered on, the pulse motor valve is fully closed, which

extends the time for vacuuming.)

Open the valve fully

Open the valve of the outdoor unit fully.

Heat insulation process

Apply heat insulation for the pipes separately at liquid

side and gas side.

• For the heat insulation to the pipes at gas side, use

the material with heat-resisting temperature 248°F

(120°C) or higher.

heat insulation to the pipe connecting section of the

indoor unit securely without gap.

• To use the attached heat insulation pipe, apply the

• Apply the heat insulation to the pipe connecting

side).

• Wrap heat insulator with its slits facing up (ceiling

• Tightening torque of flare pipe connections.

Pressure of R410A is higher than that of R22.

(Approx. 1.6 times) Therefore, using a torque

wrench, tighten the flare pipe connecting sections

which connect the indoor and outdoor units of the

specified tightening torque.

Incorrect connections may cause not only a gas leak,

but also a trouble of the refrigeration cycle.

Tightening with an excessive torque may crack the nut

depending on installation conditions.

Gas side refrigerant pipe

connection

AP072 and AP096 models.

* The brazing connections on the gas side are

• Turn up the pipe heat insulator to the unit side.

• Wrap the pipe with wet cloth.

brazing machine.

• Remove the cup on the gas side piping by using a

Do not burn the pipe heat insulator.

• Braze the connection piping to the joint part.

–11–

(1.0 - 1.5)

tool used

0.04" - 0.06"

Conventional

Tightening torque

(Unit: ft•lbs (N•m))

–0.4

R410A tool used

(0 - 0.5)

0 - 0.02"

3/8" (9.5) 24 -31 (33 - 42)

1/2" (12.7) 37- 46 (50 - 62)

5/8" (15.9) 46 -57 (63 -77)

3/8" (9.5)

copper pipe

Outer dia. of

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

9 Refrigerant piping

1/2" (12.7), 5/8" (15.9)

When the refrigerant pipe is long, provide support

brackets at intervals of 8'2" to 9'10" (2.5 m to 3 m) to

clamp the refrigerant pipe. Otherwise, abnormal sound

may be generated.

Use the flare nut attached with the indoor unit or R410A

flare nut.

Use general copper pipes with a wall thickness of 0.03"

(0.8 mm) for Ø1/2" (12.7 mm), and with a wall thickness

of 0.04" (1.0 mm) for Ø7/8" (22.2 mm) (half hard).

Do not use any copper pipes with a wall thickness less

than these thicknesses.

Flaring diameter size: A (Unit: in (mm))

3/8" (9.5) 0.52" (13.2)

1/2" (12.7) 0.65" (16.6)

5/8" (15.9) 0.78" (19.7)

copper pipe

Outer dia. of

Permissible piping length and

height difference

They vary depending on the outdoor unit. For details,

refer to the Installation Manual attached to the outdoor

unit.

* In case of flaring for R410A with the conventional

Pipe size

– 91 –

flare tool, pull it out approx. 0.02" (0.5 mm) more than

that for R22 to adjust to the specified flare size. The

copper pipe gauge is useful for adjusting projection

Model MMD- AP048 AP072, AP096

margin size.

Ø7/8"

(22.2 mm)

Ø5/8"

(15.9 mm)

Gas side

Pipe size

• The sealed gas was sealed at the atmospheric

(Unit: in (mm))

pressure so when the flare nut is removed, there will

no “whooshing” sound: This is normal and is not

Ø1/2"

(12.7 mm)

Ø3/8"

(9.5 mm)

Liquid side

indicative of trouble.

• Use two wrenches to connect the indoor unit pipe.

with brazing.

• The pipe (Ø7/8" (22.2 mm)) at gas side is connected

below.

• Use the tightening torque levels as listed in the table

Cut the pipe with a pipe cutter.

Remove burrs completely. (Remaining burrs may

Liquid side refrigerant pipe

connection

Flaring

cause gas leakage.)

Outer dia. of connecting

pipe (mm)

Insert a flare nut into the pipe, and flare the

pipe.

Use the flare nut provided with the unit or the one

used for the R410A refrigerant. The flaring

dimensions for R410A are different from the ones

used for the conventional R22 refrigerant. A new

flare tool manufactured for use with the R410A

refrigerant is recommended, but the conventional

tool can still be used if the projection margin of the

copper pipe is adjusted to be as shown in the

following table.

21-EN 22-EN

WARNING

CAUTION

REQUIREMENT



NOTE

CAUTION

Indoor unit

Remote control inter-unit wiring

Indoor unit Indoor unit Indoor unit

Remote

control

(Max. 8 units)

Remote

control

wiring

MCA : Minimum Circuit Amps

MOCP : Maximum Overcurrent Protection (Amps)

Power supply wire

Select wire size based on the MCA.

▼ Electric characteristics

2.30 15

Voltage Range (V) MCA MOCP

Min Max (A) (A)

Model Power Supply

MMD-AP0481HF2UL

208 / 230 V-1-60 Hz 187 253

MMD-AP0721HF2UL 4.29 15

(Up to 6561’8” (2000 m)) AWG14

(Up to 3280’10” (1000 m)) AWG16

Wire size

MMD-AP0961HF2UL 4.76 15

Control wiring between indoor units, and outdoor unit (2-core

shielded wire)

Control wire

Remote control wiring

In case of wired type only Up to 1640’5” (500 m)

In case of wireless type included Up to 1312’4” (400 m)

Remote control wiring, remote control inter-unit wiring Wire size: AWG20

Total wire length of remote control wiring and remote control

2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.

inter-unit wiring = L + L1 + L2 + … Ln

L2 Ln

• Use copper supply wire.

• Use UL wire rated 600 V for the power supply.

Total wire length of remote control inter-unit wiring = L1 + L2 + … Ln Up to 656’2” (200 m)

• Use UL wire rated 300 V for the remote control wires and control wires.

The remote control wire (Communication line) and AC208 / 230 V wires cannot be parallel to contact each other and

cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or other

factor.

–12–

Power supply wire and

control wires specifications

Power supply wire and control wires are locally

procured.

For the power supply specifications, follow to the right

table. If capacity is little, it is dangerous because

overheat or seizure may be caused.

Indoor unit power supply

For the power supply of the indoor unit, prepare the

exclusive power supply separated from that of the

Power supply 208 / 230-1-60

outdoor unit.

▼ Power supply

Control wiring, Central control wiring

control wiring between indoor unit and outdoor unit

• 2-core with non-polarity wires are used for the

and Central control wiring.

length of the control wire length between indoor and

outdoor units added with the central control wire

• The length of the communication line means the total

length.

• To prevent noise trouble, use 2-core shielded wire.

Keep the connecting terminal free from external

force.

Improper wire connection or clamping may result in

exothermic, fire or malfunction.

Incomplete grounding cause an electric shock.

Do not connect ground wires to gas pipes, water

pipes, lightning rods or ground wires for telephone

wires.

wiring regulations.

10Electrical connection

1. Use predefined wire and connect them certainly.

2. Connect ground wire. (grounding work)

3. Install appliance in accordance with national

Capacity shortage of circuit breaker or incomplete

Code) or CEC (Canadian Electrical Code) for special

requirements.

cause an electrical fire or smoke.

If circuit breaker is not installed, an electric shock may

be caused.

inner insulator of power and control wires when

peeling them.

thickness, type, and protective devices required.

blocks (U1, U2, A, B etc.) for control wiring.

(Otherwise, the system will fail.)

contact with the high-temperature part of the pipe.

The coating may melt resulting in an accident.

installation may cause an electric shock or a fire.

• Consult local building codes, NEC (National Electrical

• If incorrect / incomplete wiring is carried out, it will

• Install circuit breaker is not tripped by shock waves.

• Use the cord clamps attached to the product.

• Do not damage or scratch the conductive core and

• Use the power cord and control wire of specified

• Do not connect 208 / 230 V power to the terminal

until vacuuming of the refrigerant pipes completes.

• Perform the electric wiring so that it does not come to

• Do not turn on the circuit breaker of the indoor unit

– 92 –

Regulation in each country.

the same line.

• For power supply wiring, strictly conform to the Local

• Run the refriger ant piping line and control wiring line in

23-EN 24-EN



CAUTION

NOTE

U1U2

U1U2U3U4L1L2 L3 N U5U6

L1L2 A BU1U2L1L2 A B U1U2L1L2 A B U1U2L1L2 A B

A B

U1U2U3U4L1L2 L3 N U5U6

A B A B

Outdoor Power supply

Ground

terminal

Ground

terminal

Outdoor Power supply

Circuit breaker Circuit breaker

Header outdoor unit

Follower outdoor unit

Control wiring between outdoor units

Control wiring between indoor and outdoor units

Control wiring between indoor units

Outside Air Unit

Other indoor unit Other indoor unit

Other indoor unit

Ground Ground Ground Ground

Remote

control

Remote

control

Remote

control

Indoor

power

supply

Circuit

breaker

208 /

230-1-60

Disconnect

switch per NEC

Disconnect

switch per

NEC

Disconnect

switch per

NEC

Disconnect

switch per

NEC

Group control



REQUIREMENT



Unit: in (mm)

Indoor / Outdoor

control wiring

1, U2 terminals)

Remote control wiring

(A, B terminals)

<MMD-AP048 type> <MMD-AP072 type, AP096 type>

Power supply wire

Power Supply wire

Indoor / Outdoor

control wiring

1, U2 terminals)

Remote control wiring

(A, B terminals)

Conduit pipe

Ground screw

L1 L2

0.8" (20)

1.2" (30)

0.4" (10)

Ground wire

U1 U2 A B

L1 L2

(10 mm)

U1 U2 A B

(20 mm)

Wire connection

–13–

Power supply wires and ground wire

Power supply wire: 0.4

Ground wire: 0.8

(Do not apply tension to the connecting section of the terminal block.)

• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.

• Pass the wires through the bushing of wire connection holes of the indoor unit.

• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing or other purpose.

• The low-voltage circuit is provided for the remote control. (Do not connect the high-voltage circuit)

• Remove the cover of the electrical control box by taking off the mounting screws (2 positions).

• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.

control box cannot be drawn out in service time.

• Mount the cover of the electrical control box without pinching wires.

• Set a loop for the connecting wire of the storing part of the indoor unit electrical control; otherwise the electrical

1. Strip the wire ends.

2. Match the wire colors with the terminal numbers on the indoor units’ and circuit breakers’ terminal blocks and

firmly screw the wires to the corresponding terminals.

3. Secure the ground wire with the ground screw.

4. Fix the wires with a cord clamp.

Wiring between indoor and outdoor units

The Outside Air Unit and indoor unit for air conditioning cannot be controlled as a group.

An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the

header unit.

▼ Wiring example

– 93 –

25-EN 26-EN

CAUTION



0.08” (2) or less

Power supply wires and control

wire

Terminal block

Remote control unit

Terminal block for remote

control wiring of indoor

unit

Remote control wire

(Locally procured)

REQUIREMENT



CAUTION

(* Display content varies with the indoor unit

model.)

Basic procedure for changing

settings

Change the settings while the air conditioner is not

working. (Stop the air conditioner before making

settings.)

is pushed, the indoor unit number

button is pushed.)

clear the display content, and repeat the

procedure from the beginning. (No operation of

the remote control is accepted for a while after

(While air conditioners are operated under the

group control, “ALL” is displayed first. When

Push and hold button and “TEMP.”

button simultaneously for at least 4

seconds. After a while, the display flashes

as shown in the figure. Confirm that the

CODE No. is [01].

Set only the CODE No. shown in the following table: Do

NOT set any other CODE No.

If a CODE No. not listed is set, it may not be possible to

operate the air conditioner or other trouble with the

product may result.

• If the CODE No. is not [01], push button to

displayed following “ALL” is the header unit.)

addresses are set up by performing operations on the

outdoor interface circuit board.)

While the automatic addresses are being set up, no

remote control operations can be performed. Setup

takes up to 10 minutes (usually about 5 minutes).

setup

It takes up to 10 minutes (usually about 3 minutes) for

When the air conditioner is used for the first time, it will

take some moments after the power has been turned on

before the remote control becomes available for

operations: This is normal and is not indicative of trouble.

11Applicable controls

• Concerning the automatic addresses (The automatic

• When the power is turned on after automatic address

the outdoor unit to start operating after the power has

been turned on.

Before the air conditioner was shipped from the factory,

all units are set to [STANDARD] (factory default). If

necessary, change the indoor unit settings.

The settings are changed by operating the wired remote

control.

* The settings cannot be changed using only a wireless

remote control, simple remote control or group control

remote control by itself so install a wired remote control

separately as well.

–14–

Firmly tighten the screws of the terminal block.

Keep the wire length as shown in figure below when it is connected to the terminal block.

Remote control wiring

Strip off approx. 9 mm the wire to be connected.

▼ Wiring diagram

– 94 –

Address setup

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

27-EN 28-EN



1) By using 500 V-megger, check that resistance of 1 MΩ or more exists between the terminal block L to N



CAUTION

2, 4

1,5

Before test run

12Test run

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

and the grounding.

If resistance of less than 1 MΩ is detected, do not run the unit.

2) Check the valve of the outdoor unit being opened fully. protective device does not work.)

• To protect the compressor at activation time, leave power-ON for 12 hours or more before operating.

• Do not press the electromagnetic contactor to forcibly perform a test run. (This is very dangerous because the

• Before starting a test run, set addresses by following the Installation Manual supplied with the outdoor unit.

Execute a test run

board, and then turn the power back on. (First set the operating mode to “fan,” and then operate.) When the test

run has been performed using this method, do NOT forget to release the shorting of CN72 after the test run is

completed.

• When a fan operation is to be performed for an individual indoor unit, turn off the power, short CN72 on the circuit

Operate the unit with the wired remote control as usual.

For the procedure of the operation, refer to the attached Owner’s Manual to the outdoor unit.

A forced test run can be executed in the following procedure even if the operation stops by thermostat-OFF.

In order to prevent a serial operation, the forced test run is released after 60 minutes have passed and returns to

the usual operation.

Do not use the forced test run for cases other than the test run because it applies an excessive load to the devices.

Push button for 4 seconds or more. [TEST] is displayed on the display part and the selection

of mode in the test mode is permitted.

Push button.

–15–

4, select the SET

Filter sign setting

According to the installation condition, the filter sign

term (Notification of filter cleaning) can be changed.

Follow to the basic operation procedure

3, specify [01].

2500 H

(Factory default)

0003 5000 H

0002

0004 10000 H

Setting the level of dirtiness

for the filter

The time when the filter indicator lights can be changed

to half depending on the level of dirtiness.

0000 None

DATA of filter sign term from the following table.

1 → 2 → 3 → 4 → 5 → 6).

(

• For the [SET DATA] in Procedure

• For the CODE No. in Procedure

0001 150 H

SET DATA Filter sign term

Follow to the basic operation procedure

1 → 2 → 3 → 4 → 5 → 6). Perform the operation.

(

• Specify [02] for the CODE No. in Procedure

4 is [0001].

SET DATA 0000 0001

• The SET DATA in Procedure

Group control

Filter sign term Normal Half

In a group control, a remote control can control up to

maximum 8 units.

The Outside Air Unit and indoor unit for air conditioning

(Identical refrigerant line) system, refer to “Electrical

connection” in this Manual.

in the following procedure.

control wires from the remote control terminal blocks

(A, B) of the indoor unit connected with a remote

control to the remote control terminal blocks (A, B) of

the other indoor unit. (Non-polarity)

cannot be controlled as a group.

• For wiring procedure and wires of the individual line

• Wiring between indoor units in a group is performed

• Connect the indoor units by connecting the remote

attached to the outdoor unit.

• For address setup, refer to the Installation Manual

buttons.

Each time button is pushed, indoor

unit numbers in the control group change

cyclically. Select the indoor unit to change

settings for.

The fan of the selected unit runs and the louvers

start swinging. The indoor unit for change settings

can be confirmed.

buttons.

Specify CODE No. [ ] with “TEMP.” /

Select SET DATA [ ] with “TIME” /

Push button. When the display changes

from flashing to lit, the setup is completed.

unit, repeat from Procedure

repeat from Procedure

• To change other settings of the selected indoor

Use button to clear the settings. To make

• To change settings of another indoor unit,

settings after button was pushed, repeat from

– 95 –

button to determine the settings.

Procedure

When settings have been completed, push

When button is pushed, flashes and

then the display content disappears and the air

conditioner enters the normal stop mode.

(While is flashing, no operation of the

remote control is accepted.)

29-EN 30-EN



REQUIREMENT

Check code Indoor UNIT No. in which

a problem occurred

Confirmation and check

13Troubleshooting

When a problem occurred in the air conditioner, check code and indoor UNIT No. appear on the display part of the

remote control.

The check code is only displayed during the operation.

If the display disappears, operate the air conditioner according to the following “Confirmation of check code log” for

confirmation.

Confirmation of check code log

When a problem occurred on the air conditioner, the check code log can be confirmed with the following procedure.

(The check code log is stored in memory up to 4 check code.)

The log can be confirmed from both operating status and stop status.

When and buttons are pushed simultaneously for 4 seconds or more, the following display

appears.

If is displayed, the mode enters in the check code log mode.

•[01: Order of check code log] is displayed in CODE No.

• [Check code] is displayed in CHECK.

• [Indoor unit address in which a problem occurred] is displayed in Unit No.

Every pushing of button used to set temperature, the check code log stored in memory is

displayed in order.

The numbers in CODE No. indicate CODE No. [01] (latest) → [04] (oldest).

After confirmation, push button to return to the usual display.

Do not push button because all the check code log of the indoor unit will be deleted.

–16–

Select the operation mode with button, [ Cool] or [ Heat].

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

• The temperature controlling function does not work during test run.

• The detection of trouble is performed as usual.

After the test run, push button to stop a test run.

(Display part is same as procedure 1.)

Push button to cancel (release from) the test run mode.

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

◆ Requirements for turning thermostat OFF

Cooling operation

• When the outside air temperature is lower than or equal to 66.2 °F (19 °C).

– 96 –

• When the outside air temperature is lower than or equal to 37 °F (3 °C) above the set temperature.

Heating operation

• When the outside air temperature is lower than or equal to 23 °F (-5 °C).

• When the outside air temperature is higher than or equal to 59 °F (15 °C).

• When the outside air temperature is higher than or equal to 37 °F (3 °C) above the set temperature.

31-EN 32-EN



I/F

Sub-

code

A3-IPDU

Fan-

IPDU

Sub-

code

A3-IPDU

Fan-

IPDU

12312 12312

01 c 0D ccc

02 c 0E ccc

03 cc 0F cccc

04 c 11 cc

05 cc 12 cc

06 cc 13 cc c

07 ccc 18 cc

08 c 19 ccc

09 cc1A ccc

0A cc 1B cc c c

0B cc c

Circle (

): IPDU trouble

0C cc

ALT

I/F

TE2 sensor trouble

TG1 sensor trouble

TG2 sensor trouble

TE2 sensor

01: TG1

02: TG2

01: TS1 sensor

device

Judging

Check code name

TE1 sensor trouble

Flash

Ready

Timer

receiving unit

Sensor block display of

Operation

Check code Wireless remote control

Outdoor 7-segment display

Auxiliary code

TE1 sensor

ALT TS1 sensor trouble, TS3 sensor trouble I/F

ALT TH sensor trouble IPDU

03: TS3 sensor

01: Comp. 1 side

02: Comp. 2 side

I/F

Outdoor temp. sensor miswiring (TE1, TL)

Outdoor pressure sensor miswiring (Pd, Ps)

03: Comp. 3 side

Compressor break down IPDU

Compressor trouble (lock) IPDU

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

Current detect circuit system trouble IPDU

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

F01 — — ALT Indoor TCJ sensor trouble Indoor

F02 — — ALT Indoor TC2 sensor trouble Indoor

F03 — — ALT Indoor TC1 sensor trouble Indoor

F04 F04 — ALT TD1 sensor trouble I/F

F05 F05 — ALT TD2 sensor trouble I/F

F06 F06

F07 F07 — ALT TL sensor trouble I/F

F08 F08 — ALT TO sensor trouble I/F

F09 F09

F10 — — ALT Indoor TA sensor trouble Indoor

F11 — TF sensor ALT TF sensor trouble Indoor

F12 F12

F13 F13

F15 F15 — ALT

F16 F16 — ALT

F22 F22 — ALT TD3 trouble I/F

F23 F23 — ALT Ps sensor trouble I/F

F24 F24 — ALT Pd sensor trouble I/F

F29 — — SIM Indoor other trouble Indoor

Wired remote

control display

E31 E31 IPDU communication trouble I/F

F31 F31 — SIM Indoor EEPROM trouble I/F

H01 H01

H02 H02

H03 H03

H05 H05 — TD 1 miswiring I/F

H06 H06 — Low pressure protective operation I/F

H07 H07 — Oil level down detective protection I/F

–17–

I/F

Capacity over / No. of connected indoor units

Combined capacity of indoor units

Indoor is nothing during automatic

addressing

I/F

Indoor

exceeds 120% of combined capacity of

outdoor units. (SMMS-i only)

Communication trouble between indoor units

Outdoor header units quantity trouble I/F

Other line connected during automatic

address

I/F

Decrease of No. of connected outdoor un its

Sending trouble in communication

between outdoor units

side)

Decrease of No. of indoor units I/F

Communication circuit trouble between

I/F

indoor / outdoor (Detected at outdoor

side)

control

Remote

Indoor

Communication trouble between indoor

MCU

Automatic address start trouble I/F

Indoor

Communication trouble between indoor

and remote control (Detected at indoor

Indoor

side)

Communication circuit trouble between

indoor / outdoor (Detected at indoor

control

Remote

Communication trouble between indoor

and remote control

(Detected at remote control side)

control

Remote

device

Judging

Check code name

Flash

Ready

: Lighting, : Fla shing, : Goes off

IPDU : Intelligent Power Drive Unit

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

SIM : Simultaneous flashing when there are two flashing LED.

Timer

receiving unit

Sensor block display of

Operation

Check codes and parts to be checked

Check method

On the remote control (Wired remote control, Central control remote control) and the interface P.C. board of the

outdoor unit (I/F), a check display LCD (Remote control) or 7-segment display (on the outdoor interface P.C. board)

to display the operation is provided. Therefore the operation status can be known. With this self-diagnosis function,

a trouble or position with trouble of the air conditioner can be found as shown in the table below.

Check code list

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

• To check from indoor remote control: See “Wired remote control display” in the list.

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

• To check from indoor unit with a wireless remote control: See “Sensor block display of receiving unit” in the list.

Check code Wireless remote control

Outdoor 7-segment display

Auxiliary code

E01 — —

E02 — — Remote control transmission trouble

Wired remote

control display

E03 — —

– 97 –

No. of indoor units in which sensor has been normally

received

E06 E06

—E07 —

E08 E08 Duplicated indoor addresses Duplicated indoor addresses Indoor / I/F

E04 — —

01: Indoor / Outdoor communication

02: Communication between outdoor units

00: Capacity over

01 ~:No. of connected units

00: Header is nothing

02: Two or more header units

01: Outdoor of other line connected

02: Indoor of other line connected

E09 — — Duplicated header remote controls

E10 — —

E12 E12

E15 E15 —

E16 E16

E18 — —

E19 E19

E20 E20

E28 E28 Detected outdoor unit number Follower outdoor unit trouble I/F

E23 E23 —

E25 E25 — Duplicated follower outdoor addresses I/F

E26 E26 No. of outdoor units which received signal normally

33-EN 34-EN

IPDU

device

Judging

Indoor

device

Judging

purpose

General-

TCC-LINK

equipment I/F

Trouble detected by TCC-LINK central control device

Check code name

Sending trouble in TCC-LINK central

control device

Receiving trouble in TCC-LINK central

control device

Batch alarm of general-purpose

equipment control interface

Flash

Ready

Timer

receiving unit

Sensor block display of

Operation

Check code Wireless remote control

Outdoor 7-segment display

Auxiliary code

C05 — — —

Wired remote

control display

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

— — (L20 is displayed) Duplicated central control addresses

C06 — — —

P30

C12 — — —

TCC-LINK : TOSHIBA Carrier Communication Link.

Check code name

Comp position detective circuit system

trouble

Other indoor unit trouble

(Group follower unit trouble)

ALT

Flash

Ready

Timer

receiving unit

Sensor block display of

Operation

Check code Wireless remote control

Outdoor 7-segment display

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

Auxiliary code

P31 P31 — ALT

P29 P29

Wired remote

control display

–18–

I/F

device

Judging

Check code name

Oil level detective temp sensor trouble I/F

Flash

Ready

Timer

receiving unit

Sensor block display of

Operation

Check code Wireless remote control

Outdoor 7-segment display

01: TK1 sensor trouble

02: TK2 sensor trouble

03: TK3 sensor trouble

04: TK4 sensor trouble

Auxiliary code

05: TK5 sensor trouble

Oil level detective circuit trouble I/F

01: TK1 oil circuit system trouble

02: TK2 oil circuit system trouble

03: TK3 oil circuit system trouble

04: TK4 oil circuit system trouble

05: TK5 oil circuit system trouble

I/F

Duplicated indoor units with priority

(Displayed in indoor unit with priority)

Duplicated indoor units with priority

(Displayed in unit other than indoor unit

with priority)

Phase loss trouble / interruption of

power supply

ALT High-pressure SW system operation IPDU

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

00: Detected phase loss

I/F

Inverter DC voltage (Vdc) trouble

ALT

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

Indoor

Indoor fan motor trouble o r duct setting miss

ALT Heat sink overheat trouble IPDU, I/F

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

ALT Gas leak detection I/F

01: TS condition

02: TD condition

0 : IGBT circuit

1 : Location detection circuit trouble

3 : Motor lock-up trouble

ALT Outdoor fan IPDU trouble IPDU

sensor.

4 : Motor current was detected.

C : Abnormal temperature was detected by the TH

D : TH sensor trouble

E :Inverter DC voltage trouble (outdoor unit fan)

Caution)

Although letters 0 to F appear at locations indicated

by “ ”, please ignore them.

ALT G-TR short protection trouble IPDU

01: Comp. 1 side

02: Comp. 2 side

03: Comp. 3 side

L03 — — SIM Indoor center unit duplicated Indoor

L04 L04 — SIM Outdoor line address duplicated I/F

L05 — — SIM

L06 L06 No. of indoor units with priority SIM

L07 — — SIM Group line in individual indoor unit Indoor

L08 L08 — SIM Indoor group / Address unset Indoor, I/F

L09 — — SIM Indoor capacity unset Indoor

L10 L10 — SIM Outdoor capacity unset I/F

L17 L17 — SIM Outdoor unit model unmatch trouble I/F

H08 H08

H15 H15 — TD2 miswiring I/F

H16 H16

Wired remote

control display

H25 H25 — TD3 miswiring I/F

L20 — — SIM Duplicated central control addresses Indoor

L28 L28 — SIM Over No. of connected outdoor units I/F

L29 L29 The same as E31 SIM No. of IPDU trouble I/F

– 98 –

— L31 — — Extended I/C trouble I/F

L30 L30 Detected indoor address SIM Indoor outside interlock Indoor

P01 — — ALT Indoor fan motor trouble Indoor

P03 P03 — ALT Discharge temp. TD1 trouble I/F

P04 P04

P05 P05

P07 P07

P10 P10 Detected indoor address ALT Indoor overflow trouble Indoor

P12 — — ALT

P13 P13 — ALT O utdoor liquid back detection trouble I/F

P15 P15

P17 P17 — ALT Discharge temp. TD2 trouble I/F

P18 P18 — ALT Discharge temp. TD3 trouble I/F

P19 P19 Detected outdoor unit number ALT 4-way valve inverse trouble I/F

P20 P20 — ALT High-pressure protective operation I/F

P22 P22

P26 P26

35-EN 36-EN

13. DETACHMENTS

WARNING

Before replacement of the parts, be sure to stop operation of the air conditioner and turn off switch of the breaker.

1 Remove the electric parts box cover.

Remove the M4 screws.

Electric parts box cover

Fan assembly

1) The model in the left photo is AP0721, AP0961 types.

2) The one fan is provided to AP0481 type, two are provided to AP0721, AP0961 types, respectively. AP0481 type has the same configuration as AP0721, AP0961 types.

CAUTION

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

Remove the electric parts box cover.

2 Remove lead wires of the fan motor connected to the terminal block inside of the

electric parts box.

One fan motor to AP0481 type, two fan motors to AP0721 / AP0961 type are provided. (Photo: AP0961 type)

Cut binding tie.

Remove Faston terminals of which wire color are blue (1), orange (2), black (3) in the fan motor lead wires.

Remove the white and blue connectors.

– 99 –

Status which tie wrap biuding wire removed.

Remove the M5 screws from the cabinet and then put them on the electric parts box.

Rmove the M5 screws (8 positions).

Remove the cover plate.

Cover plate

Take off the self tapping M4 screws (3 positions).

Removed status

Pull out the fan toward you.

Rmove the self tapping M4 screws (3 positions).

Status which all the fan assembly are pulled out.

Pull out the fan toward you.

– 100 –

Toshiba MMD-AP0721HF2UL, MMD-AP0481HF2UL, MMD-AP0961HF2UL User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual