Toshiba MMU-AP0074YH-TR, MMU-AP0094YH-TR, MMU-AP0124YH-TR, MMU-AP0154SH-TR, MMU-AP0184SH-TR SERVICE MANUAL

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FILE No. A10-033

AIR CONDITIONER (MULTI TYPE)

SERVICE MANUAL

This service manual provides relevant explanations about new indoor unit (4 series). Please refer to the following service manuals for each indoor units.

Indoor unit

Model name: 4-way Cassette Type

(MMU-AP∗∗∗2H) 2-way Cassette Type (2 series)

(MMU-AP∗∗∗2WH) Fresh Air Intake Indoor Unit Type

(MMD-AP∗∗∗1HFE) High-wall Type (2 series)

(MMK-AP∗∗∗2H) High-wall Type (3 series)

(MMK-AP∗∗∗3H) Other indoor units (1 series) A03-009, A03-010, A05-006, A05-007, A06-002

A08-004

A10-007

A06-016

SVM-05052-1

SVM-09059

Indoor unit

<1-way Cassette Type (YH, SH)> MMU-AP0074YH-E(-TR) MMU-AP0094YH-E(-TR) MMU-AP0124YH-E(-TR) MMU-AP0154SH-E(-TR) MMU-AP0184SH-E(-TR) MMU-AP0244SH-E(-TR)

<Compact 4-way Cassette Type> MMU-AP0074MH-E(-TR) MMU-AP0094MH-E(-TR) MMU-AP0124MH-E(-TR) MMU-AP0154MH-E(-TR) MMU-AP0184MH-E(-TR)

<Slim Duct Type> MMD-AP0074SPH-E(-TR) MMD-AP0094SPH-E(-TR) MMD-AP0124SPH-E(-TR) MMD-AP0154SPH-E(-TR) MMD-AP0184SPH-E(-TR)

<Concealed Duct High Static Pressure Type> MMD-AP0184H-E(-TR) MMD-AP0244H-E(-TR) MMD-AP0274H-E(-TR) MMD-AP0364H-E(-TR) MMD-AP0484H-E(-TR) MMD-AP0724H-E(-TR) MMD-AP0964H-E(-TR)

<Ceiling Type> MMC-AP0154H-E(-TR) MMC-AP0184H-E(-TR) MMC-AP0244H-E(-TR) MMC-AP0274H-E(-TR) MMC-AP0364H-E(-TR) MMC-AP0484H-E(-TR)

<Floor Standing Type> MMF-AP0154H-E(-TR) MMF-AP0184H-E(-TR) MMF-AP0244H-E(-TR) MMF-AP0274H-E(-TR) MMF-AP0364H-E(-TR) MMF-AP0484H-E(-TR) MMF-AP0564H-E(-TR)

<Floor Standing Concealed Type> MML-AP0074BH-E(-TR) MML-AP0094BH-E(-TR) MML-AP0124BH-E(-TR) MML-AP0154BH-E(-TR) MML-AP0184BH-E(-TR) MML-AP0244BH-E(-TR)

<Floor Standing Cabinet Type> MML-AP0074H-E(-TR) MML-AP0094H-E(-TR) MML-AP0124H-E(-TR) MML-AP0154H-E(-TR) MML-AP0184H-E(-TR) MML-AP0244H-E(-TR)

<Concealed Duct Standard Type> MMD-AP0074BH-E(-TR), MMD-AP0094BH-E(-TR), MMD-AP0124BH-E(-TR), MMD-AP0154BH-E(-TR) MMD-AP0184BH-E(-TR), MMD-AP0244BH-E(-TR), MMD-AP0274BH-E(-TR), MMD-AP0304BH-E(-TR) MMD-AP0364BH-E(-TR), MMD-AP0484BH-E(-TR), MMD-AP0564BH-E(-TR)

PRINTED IN JAPAN, Apr, 2011, TDOC

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Precautions for Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1-1. Compact 4-way cassette type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1-2. 1-way cassette type (compact type YH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1-3. 1-way cassette type (SH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

1-4. Concealed duct standard type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1-5. Concealed duct high static pressure type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1-6. Slim duct type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

1-7. Ceiling type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1-8. Floor standing cabinet type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1-9. Floor standing concealed type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

1-10. Floor standing type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2 Parts Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2-1. Indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3 Refrigerant Cycle Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 Control Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5 Applied Control and Functions (Including Circuit Configuration) . . . . . . . . . . . . . 37

5-1. Indoor controller block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5-1-1. When main (sub) remote controller connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5-1-2. When wireless remote controller kit connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5-1-3. When both main (sub) remote controller and wireless remote controller kit connected. 41

5-2. Indoor printed circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

5-3. Optional connector specifications of indoor P.C. board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5-4. Test operation of indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

5-5. Method to set indoor unit function DN code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

5-6. Applied control of indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6-1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

6-2. Troubleshooting method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

6-3. Troubleshooting based on information displayed on remote controller. . . . . . . . . . . . . . . . . . . . 74

6-4. Check codes displayed on remote controller and SMMS outdoor unit (7-segment display on I/F

board) and locations to be checked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6-5. Sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

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7 P.C. Board Exchange Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

7-1. Replacement of indoor P.C. boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

8 Detachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

8-1. 1-way cassette (SH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

8-2. Compact 4-way cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

8-3. Slim duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

8-4. Concealed duct standard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

8-5. Concealed duct high static pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

8-6. Ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

8-7. Floor standing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

8-8. Floor standing cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

9 Exploded Diagram / Service Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

9-1. 1-way cassette type (YH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

9-2. 1-Way cassette type (SH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

9-3. Compact 4-way cassette type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

9-4. Slim duct type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

9-5. Concealed duct standard type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

9-6. Concealed duct high static pressure type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

9-7. Ceiling type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

9-8. Floor standing type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

9-9. Floor standing concealed type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

9-10. Floor standing cabinet type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

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Original instruction

Please read carefully through these instructions that contain important information which complies with the “Machinery” Directive (Directive 2006/42/EC), and ensure that you understand them.

Generic Denomination: Air Conditioner

Definition of Qualified Installer or Qualified Service Person

The air conditioner must be installed, maintained, repaired a nd removed by a qualified installer or qualified service person. When any of these jobs is to be done, ask a qualified installer or qualified service pe rson to do them for you. A qualified installer or qualified service person is an agent who has the qualifications an d knowledg e descri bed in the table below.

Agent Qualifications and knowledge which the agent must have

• The qualified installer is a person who installs, maintains, relocates and removes the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations.

• The qualified installer who is allowed to do the electrical work involved in installation, relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to electrical work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly

Qualified installer

Qualified service person

acquainted with the knowledge related to this work.

• The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation, relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to refrigerant handling and piping work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.

• The qualified installer who is allowed to work at heights has been trained in matters relating to working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.

• The qualified service person is a person who installs, repairs, maintains, relocates and removes the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations.

• The qualified service person who is allowed to do the electrical work involved in installation, repair, relocation and removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to electrical work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.

• The qualified service person who is allowed to do the refrigerant handling and piping work involved in installation, repair, relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to refrigerant handling and piping work on the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.

• The qualified service person who is allowed to work at heights has been trained in matters relating to working at heights with the air conditioners made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to this work.

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Definition of Protective Gear

When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing. In addition to such normal protective gear, wear the protective gear described below when un dertaking the special work detailed in the table below. Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns, electric shocks and other injuries.

Work undertaken Protective gear worn

All types of work

Electrical-related work

Work done at heights (50 cm or more)

Transportation of heavy objects Shoes with additional protective toe cap Repair of outdoor unit Gloves to provide protection for electricians and from heat

Protective gloves ‘Safety’ working clothing

Gloves to provide protection for electricians and from heat Insulating shoes Clothing to provide protection from electric shock

Helmets for use in industry

The important contents concerned to the safety are described on the product itself and on this Service Manual. Please read this Service Manual after understanding the described items thoroughly in the following contents (Indications / Illustrated marks), and keep them .

[Explanation of indications]

Indication Explanation

DANGER

WARNING

CAUTION

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

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

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

* Property damage: Enlarged damage concerned to property, furniture, and domestic animal / pet

[Explanation of illustrated marks]

Mark Explanation

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

Indicates mandatory items (Compulsory items 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.

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Warning Indications on the Air Conditioner Unit [Confirmation of warning label on the main unit]

Confirm that labels are indicated on the specified positions If removing the label during parts replace, stick it as the original.

Warning indication Description

WARNING ELECTRICAL SHOCK HAZARD

Disconnect all remote electric power supplies before servicing.

WARNING

Moving parts. Do not operate unit with grille removed. Stop the unit before the servicing.

CAUTION

High temperature parts. You might get burned when removing this panel.

CAUTION

Do not touch the aluminium fins of the unit. Doing so may result in injury.

CAUTION BURST HAZARD

Open the service valves before the operation, otherwise t here might be the burst.

CAUTION Do not climb onto the fan guard.

Doing so may result in injury.

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Precautions for Safety

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

DANGER

Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker for both the indoor and outdoor units to the OFF position. Otherwise, electric shocks may result.

Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the OFF position.

Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with the interior parts.

Only a qualified installer (*1) or qualified service person (*1) is allowed to remove the intake grille of the indoor unit or service panel of the outdoor unit and do the work required.

Before starting to repair the outdoor unit fan or fan guard, be absolutely sure to set the circuit breaker to the OFF position, and place a “Work in progress” sign on the circuit breaker.

Turn off breaker.

When cleaning the filter or other parts of the indoor unit, set the circuit breaker to OFF without fail, and place a “Work in progress” sign near the circuit breaker before proceeding with the work.

When you have noticed that some kind of trouble (such as when an error display has appeared, there is a smell of burning, abnormal sounds are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not touch the air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person. Take steps to ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until qualified service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to escalate or result in electric shocks or other failure.

Electric shock

hazard

Prohibition

Stay on

protection

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.

Place a “Work in progress” sign near the circuit breaker while the installation, maintenance, repair or removal work is being carried out.

There is a danger of electric shocks if the circuit breaker is set to ON by mistake. Before operating the air conditioner after having completed the work, check that the electrical parts box cover

of the indoor unit and service panel of the outdoor unit are closed, and set the circuit breaker to the ON position. You may receive an electric shock if the power is turned on without first conducting these checks.

If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in order to find out exactly where the trouble lies, wear insulated heat-resistant gloves, insulated boots and insulated work overalls, and take care to avoid touching any live parts.

You may receive an electric shock if you fail to heed this warning. Only qualified service person (*1) is allowed to do this kind of work.

Page 8

WARNING

General

Check earth

wires.

Before starting to repair the air conditioner, read carefully through the Service Manual, and repair the air conditioner by following its instructions.

Only qualified service person (*1) is allowed to repair the air conditioner. Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury, water leaks and

/ or other problems. 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.

Only a qualified installer (*1) or qualified service person (*1) is allowed to carry out the electrical work of the air conditioner.

Under no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may result in electric shocks and / or electrical leaks.

When transporting the air conditioner, wear shoes with protective toe caps, protective gloves and other protective clothing.

When connecting the electrical wires, repairing the electrical parts or undertaking other electrical jobs, wear gloves to provide protection for electricians and from heat, insulating shoes and clothing to provide protection from electric shocks.

Failure to wear this protective gear may result in electric shocks. Electrical wiring work shall be conducted according to law and regulation in the community and installation

manual. Failure to do so may result in electrocution or short circuit. Only a qualified installer (*1) or qualified service person (*1) is allowed to undertake work at heights using a

stand of 50 cm or more or to remove the intake grille of the indoor unit to undertake work. When working at heights, use a ladder which complies with the ISO 14122 standard, and follow the procedure

in the ladder’s instructions. Also wear a helmet for use in industry as protective gear to undertake the work.

When working at heights, put a sign in place so that no-one will approach the work location, before proceeding with the work.

Parts and other objects may fall from above, possibly injuring a person below. When executing address setting, test run, or troubleshooting through the checking window on the electric parts

box, put on insulated gloves to provide protection from electric shock. Otherwise you may receive an electric shock.

Do not touch the aluminum fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched for some reason, first put on protective gloves

and safety work clothing, and then proceed. 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 unit and resul t in injury. When transporting the air conditioner, wear shoes with additional protective toe caps. When transporting the air conditioner, do not take hold of the bands around the packing carton.

You may injure yourself if the bands should break. Be sure that a heavy unit (10 kg or heavier) such as a compressor is carried by two persons. This air conditioner has passed the pressure test as specified in IEC 60335-2-40 Annex EE. Before troubleshooting or repair work, check the earth wire is connected to the earth terminals of the main unit,

otherwise an electric shock is caused when a leak occurs.If the earth wire is not correctly connected, contact an electric engineer for rework.

After completing the repair or relocation work, check that the ground wires are connected properly. Be sure to connect earth wire. (Grounding work) Incomplete grounding causes an electric shock.

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

Prohibition of

modification.

Use specified

parts.

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

When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the specifications given in the Service Manual (or use the parts contained on the parts list in the Service Manual).

Use of any parts which do not satisfy the require d specifications may give rise to electric shocks, smoking and / or a fire.

Page 9

Do not bring a

child close to

the

equipment.

Insulating measures

No fire

Refrigerant

If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical parts box cover of one or more of the indoor units and the service panel of the outdoor unit removed in order to find out exactly where the trouble lies, put a sign in place so that no-one will approach the work location before proceeding with the work. Third-party individuals may enter the work site and receive electric shocks if this warning is not heeded.

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

When performing repairs using a gas burner, replace the refrigerant with nitrogen gas because the oil that coats the pipes may otherwise burn.

When repairing the refrigerating cycle, take the following measures.

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

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

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

The refrigerant used by this air conditioner is the R410A. Check the used refrigerant name and use tools and materials of the parts which match with it.

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

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

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

When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and purge the air completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air completely may cause the air conditioner to malfunction.

Do not charge refrigerant additionally. If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition in the refrigerating cycle changes resulted in change of air conditioner characteristics or refrigerant over the specified standard amount is charged and an abnormal high pressure is applied to the inside of the refrigerating cycle resulted in cause of breakage or injury. Therefore if the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming, and then newly recharge the specified amount of liquid refrigerant.

In this time, never charge the refrigerant over the specified amount. When recharging the refrigerant in the refrigerating cycle, do not mix the 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 to fire such as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.

Never recover the refrigerant into the outdoor unit. When the equipment is moved or repaired, be sure to recover the refrigerant with recovering device.

The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accident such as breakage or injury is caused.

Assembly /

Wiring

Insulator

check

Ventilation

After repair work, surely 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.

After the work has finished, be sure to use an insulation tester set (500 V Megger) to check the resistance is 1 MΩ or more between the charge section and the non-charge metal section (Earth position).

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

When the refrigerant gas leaks during work, execute ventilation. If the refrigerant gas touches to a fire, poisonous gas generates. A case of leakage of the refrigerant and the

closed room full with gas is dangerous because a shortage of oxygen occurs. Be sure to execute ventilation.

Page 10

Compulsion

Check after

repair

Do not

operate the

unit with the

valve closed.

Check after

reinstallation

Cooling check

When the refrigerant gas leaks, find up the leaked position and repair it surely. If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the service

valve, otherwise the refrigerant gas may leak into the room. The poisonous gas generates when gas touches to fire such as fan heater, stove or cocking stove though the

refrigerant gas itself is innocuous. When installing equipment which includes a large amount of charged refrigerant such as a multi air conditioner

in a sub-room, it is necessary that the density does not the limit even if the refrigerant leaks. If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.

Tighten the flare nut with a torque wrench in the specified manner. Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result in

refrigerant leakage. Nitrogen gas must be used for the airtight test. The charge hose must be connected in such a way that it is not slack. For the installation / moving / reinstallation work, follow to the Installation Manual.

If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused. Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance and

water drainage. Then perform a trial run to check that the air conditioner is running properly.

After repair work has finished, check t here is no troub le. 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. Be sure to fix the screws back which have been removed for installation or other purposes.

Check the following matters before a test run after repairing piping.

• Connect the pipes surely and there is no leak of refrigerant.

• The valve is opened.

Running the compressor under condition that the valve closes causes an abnormal high pressure resulted in damage of the parts of the compressor and etc. and moreover if there is leak of refrigerant at connecting section of pipes, the air is sucked and causes further abnormal high pressure resulted in burst or injury.

Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the air conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage, noise and / or vibration may result.

Check the following items after reinstallation.

1) The earth wire is correctly connected.

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

3) There is no inclination or unsteadiness and the installation is stable.

If check is not executed, a fire, an electric shock or an injury is caused. When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.

Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in reputing, injury, etc.

When the service panel of the outdoor unit is to be opened in order for the compressor or the area around this part to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel.

If you fail to heed this warning, you will run the risk of burning yourself because the compressor pipes and other parts will be very hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to protect electricians.

Take care not to get burned by compressor pipes or other parts when checking the cooling cycle while running the unit as they get heated while running. Be sure to put on gloves providing protection for electric shock and heat.

When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor, inverter or the areas around these parts to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel.

If you fail to heed this warning, you will run the risk of burning yourself because the fan motor, reactor, inverter heat sink and other parts will be very hot to the touch.

In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to protect electricians.

Page 11

Only a qualified installer (*1) or qualified service person (*1) is allowed to insta ll the air conditioner. If the air conditioner is installed by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and / or vibration may result.

Before starting to install the air conditioner, read carefully through the Installation Manual, and follow its instructions to install the air conditioner.

Be sure to use the company-specified products for the separately purchased parts. Use of non-specified products may result in fire, electric shock, water leakage or other failure. Have the installation performed by a qualified installer.

Do not supply power from the power terminal block equipped on the outdoor unit to another ou tdoor unit. Capacity overflow may occur on the terminal block and may result in fire.

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

Installation

Install the indoor unit at least 2.5 m above the floor level since otherwise the users may injure themselves or receive electric shocks if they poke their fingers or other objects into the indoor unit while the air conditioner is running.

Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local regulations and laws.

Install the circuit breaker where it can be easily accessed by the qualified service person (*1). If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the

limit 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 place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise it may cause imperfect combustion.

Explanations given to user

If you have discovered that the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a qualified service person to have the repairs done. Do not set the circuit breaker to the ON position until the repairs are completed.

Relocation

• Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the air conditioner. It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage, noise and / or vibration may result.

• When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe. Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and possibly resulting in reputing, injury, etc.

(*1) Refer to the “Definition of Qualified Installer or Qualified Service Person”

Page 12

Declaration of Conformity

Manufacturer: Toshiba Carrier Corporation

Authorized Representative / TCF holder:

Hereby declares that the machinery described below:

Generic Denomination: Air Conditioner

Model / type: Indoor unit

336 Tadehara, Fuji-shi, Shizuoka-ken 416-8521 JAPAN

Nick Ball Toshiba EMEA Engineering Director Toshiba Carrier UK Ltd. Porsham Close, Belliver Industrial Estate, PLYMOUTH, Devon, PL6 7DB. United Kingdom

<1-way Cassette Type (YH, SH)> MMU-AP0074YH-E(TR), MMU-AP0094YH-E(TR), MMU-AP0124YH-E(TR), MMU-AP0154SH-E(TR), MMU-AP0184SH-E(TR), MMU-AP0244SH-E(TR)

<Compact 4-way Cassette Type> MMU-AP0074MH-E(TR), MMU-AP0094MH-E(TR), MMU-AP0124MH-E(TR), MMU-AP0154MH-E(TR), MMU-AP0184MH-E(TR)

<Slim Duct Type> MMD-AP0074SPH-E(TR), MMD-AP0094SPH-E(TR), MMD-AP0124SPH-E(TR), MMD-AP0154SPH-E(TR), MMD-AP0184SPH-E(TR)

<Concealed Duct Standard Type> MMD-AP0074BH-E(TR), MMD-AP0094BH-E(TR), MMD-AP0124BH-E(TR), MMD-AP0154BH-E(TR), MMD-AP0184BH-E(TR), MMD-AP0244BH-E(TR), MMD-AP0274BH-E(TR), MMD-AP0304BH-E(TR), MMD-AP0364BH-E(TR), MMD-AP0484BH-E(TR), MMD-AP0564BH-E(TR)

<Concealed Duct High Static Pressure Type> MMD-AP0184H-E(TR), MMD-AP0244H-E(TR), MMD-AP0274H-E(TR), MMD-AP0364H-E(TR), MMD-AP0484H-E(TR), MMD-AP0724H-E(TR), MMD-AP0964H-E(TR)

<Ceiling Type> MMC-AP0154H-E(TR), MMC-AP0184H-E(TR), MMC-AP0244H-E(TR), MMC-AP0274H-E(TR), MMC-AP0364H-E(TR), MMC-AP0484H-E(TR)

<Floor Standing Type> MMF-AP0154H-E(TR), MMF-AP0184H-E(TR), MMF-AP0244H-E(TR), MMF-AP0274H-E(TR), MMF-AP0364H-E(TR), MMF-AP0484H-E(TR), MMF-AP0564H-E(TR)

<Floor Standing Concealed Type> MML-AP0074BH-E(TR), MML-AP0094BH-E(TR), MML-AP0124BH-E(TR), MML-AP0154BH-E(TR), MML-AP0184BH-E(TR), MML-AP0244BH-E(TR)

<Floor Standing Cabinet Type> MML-AP0074H-E(TR), MML-AP0094H-E(TR), MML-AP0124H-E(TR), MML-AP0154H-E(TR), MML-AP0184H-E(TR), MML-AP0244H-E(TR)

Commercial name: Super Modular Multi System Air Conditioner

Complies with the provisions of the “Machinery” Directive (Directive 2006/42/EC) and the regulations transposing into national law

Complies with the provisions of the following harmonized standard:

Super Heat Recovery Multi System Air Conditioner MiNi-Super Modular Multi System Air Conditioner (MiNi-SMMS series)

EN 378-2: 2008+A1:2009

NOTE

This declaration becomes invalid if technical or operational modifications are introduced without the manufactur er’s consent.

Page 13

Specifications

Model

MMU-AP0074MH-E * * 17 (3) MMU-AP0094MH-E * * 17 (3) MMU-AP0124MH-E * * 17 (3) MMU-AP0154MH-E * * 17 (3) MMU-AP0184MH-E * * 17 (3) MMU-AP0074YH-E * * 22 (3.5) MMU-AP0094YH-E * * 22 (3.5) MMU-AP0124YH-E * * 22 (3.5) MMU-AP0154SH-E * * 21 (5.5) MMU-AP0184SH-E * * 21 (5.5) MMU-AP0244SH-E * * 22 (5.5) MMD-AP0074BH-E * * 28 MMD-AP0094BH-E * * 28 MMD-AP0124BH-E * * 28 MMD-AP0154BH-E * * 32 MMD-AP0184BH-E * * 32 MMD-AP0244BH-E * * 43 MMD-AP0274BH-E * * 43 MMD-AP0304BH-E * * 43 MMD-AP0364BH-E * * 55 MMD-AP0484BH-E * * 55 MMD-AP0564BH-E * * 55 MMD-AP0184H-E * * 50 MMD-AP0244H-E * * 52 MMD-AP0274H-E * * 52 MMD-AP0364H-E * * 56 MMD-AP0484H-E * * 67 MMD-AP0724H-E * * 160 MMD-AP0964H-E 70 70 160 MMD-AP0074SPH-E * * 22 MMD-AP0094SPH-E * * 22 MMD-AP0124SPH-E * * 22 MMD-AP0154SPH-E * * 23 MMD-AP0184SPH-E * * 23 MMC-AP0154H-E * * 22 MMC-AP0184H-E * * 22 MMC-AP0244H-E * * 26 MMC-AP0274H-E * * 26 MMC-AP0364H-E * * 34 MMC-AP0484H-E * * 34 MML-AP0074H-E * * 37 MML-AP0094H-E * * 37 MML-AP0124H-E * * 37 MML-AP0154H-E * * 37 MML-AP0184H-E * * 40 MML-AP0244H-E * * 40 MML-AP0074BH-E * * 21 MML-AP0094BH-E * * 21 MML-AP0124BH-E * * 21 MML-AP0154BH-E * * 29 MML-AP0184BH-E * * 29 MML-AP0244BH-E * * 29 MMF-AP0154H-E * * 48 MMF-AP0184H-E * * 48 MMF-AP0244H-E * * 49 MMF-AP0274H-E * * 49 MMF-AP0364H-E * * 65 MMF-AP0484H-E 72 72 65 MMF-AP0564H-E 72 72 65

Sound power level (dBA) Weight (kg)

Cooling Heating Main unit (Ceiling panel)

Page 14

Model

MMU-AP0074MH-TR * * 17 (3) MMU-AP0094MH-TR * * 17 (3) MMU-AP0124MH-TR * * 17 (3) MMU-AP0154MH-TR * * 17 (3) MMU-AP0184MH-TR * * 17 (3) MMU-AP0074YH-TR * * 22 (3.5) MMU-AP0094YH-TR * * 22 (3.5) MMU-AP0124YH-TR * * 22 (3.5) MMU-AP0154SH-TR * * 21 (5.5) MMU-AP0184SH-TR * * 21 (5.5) MMU-AP0244SH-TR * * 22 (5.5) MMD-AP0074BH-TR * * 28 MMD-AP0094BH-TR * * 28 MMD-AP0124BH-TR * * 28 MMD-AP0154BH-TR * * 32 MMD-AP0184BH-TR * * 32 MMD-AP0244BH-TR * * 43 MMD-AP0274BH-TR * * 43 MMD-AP0304BH-TR * * 43 MMD-AP0364BH-TR * * 55 MMD-AP0484BH-TR * * 55 MMD-AP0564BH-TR * * 55 MMD-AP0184H-TR * * 50 MMD-AP0244H-TR * * 52 MMD-AP0274H-TR * * 52 MMD-AP0364H-TR * * 56 MMD-AP0484H-TR * * 67 MMD-AP0724H-TR * * 160 MMD-AP0964H-TR 70 70 160 MMD-AP0074SPH-TR * * 22 MMD-AP0094SPH-TR * * 22 MMD-AP0124SPH-TR * * 22 MMD-AP0154SPH-TR * * 23 MMD-AP0184SPH-TR * * 23 MMC-AP0154H-TR * * 22 MMC-AP0184H-TR * * 22 MMC-AP0244H-TR * * 26 MMC-AP0274H-TR * * 26 MMC-AP0364H-TR * * 34 MMC-AP0484H-TR * * 34 MML-AP0074H-TR * * 37 MML-AP0094H-TR * * 37 MML-AP0124H-TR * * 37 MML-AP0154H-TR * * 37 MML-AP0184H-TR * * 40 MML-AP0244H-TR * * 40 MML-AP0074BH-TR * * 21 MML-AP0094BH-TR * * 21 MML-AP0124BH-TR * * 21 MML-AP0154BH-TR * * 29 MML-AP0184BH-TR * * 29 MML-AP0244BH-TR * * 29 MMF-AP0154H-TR * * 48 MMF-AP0184H-TR * * 48 MMF-AP0244H-TR * * 49 MMF-AP0274H-TR * * 49 MMF-AP0364H-TR * * 65 MMF-AP0484H-TR 72 72 65 MMF-AP0564H-TR 72 72 65

Sound power level (dBA) Weigh t (kg)

Cooling Heating Main un it (Ce iling panel)

Page 15

1 Wiring Diagrams

1-1. Compact 4-way cassette type

Models: MMU-AP0074MH-E(TR), AP0094MH-E(TR), AP0124MH-E(TR), AP0154MH-E(TR), AP0184MH-E(TR)

Remote

Wireless

Controller

Adapter for

Controller

Wired Remote

Outdoor unit

(High ceiling

Indoor unit

Earth screw

reshuffling)

for Indoor Unit

Control P.C. Board

Power supply

1~50Hz 220-240V

indicates the connection terminal.

circuit

Power

supply

indicates the connector on the control P.C. board.

Long dashed short dashed line indicate the accessories.

3. indicates the protection ground.

BLU : BLUE

BLK : BLACK

FM Fan Motor

4. indicates the contro l P.C. board.

GRY : GRAY

PNK : PINK

ORN : ORANGE

FS Float Switch

LM1,2 Louver Motor

BRW : BROWN

GRN : GREEN

PMV Pulse Motor Valve

RY302 Drain Control Relay

TA Indoor temp sensor

TB01,02 Terminal Block

TC1,2,TCJ Temp sensor

1~60Hz 220V

1.Broken line indicate the wiring at site.

2. indicates the terminal block.

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

DM Drain Pump Motor

CN** Connector

Symbol Parts Name

Earth screw

Flow selector unit

F301,302 Fuse

Page 16

1-2. 1-way cassette type (compact type YH)

Models: MMU-AP0074YH-E(TR), AP0094YH-E(TR), AP0124YH-E(TR)

for Indoor Unit

Control P.C. Board

circuit

Power

supply

Sub P.C. Board

1.Broken line indicate the wiring at site.

Long dashed short dashed line indicate the accessories.

indicates the connection terminal.

2. indicates the terminal block.

indicates the connector on the control P.C. board.

3. indicates the protection ground.

4. indicates the control P.C. board.

Earth screw

Flow selector unit

Remote Controller

Line Filter

Power supply

1~50Hz 220-240V

1~60Hz 220V

Indoor unit

Earth screw

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

DM Drain Pump Motor

CN** Connector

Symbol Parts Name

FS Float Switch

FM Fan Motor

F301,302 Fuse

Outdoor unit

Fan Motor Control Relay

LM Louver Motor

PMV Pulse Motor Valve

TA Indoor temp sensor

RY001 Louver Control Relay

RY002 Drain Control Relay

RY005,006,007

TR Transformer

TC,TCJ Temp sensor

TB01,02 Terminal Block

Page 17

1-3. 1-way cassette type (SH)

Models: MMU-AP0154SH-E(TR), AP0184SH-E(TR), AP0244SH-E(TR)

for Indoor Unit

Control P.C. Board

circuit

Power

supply

(High ceiling

reshuffling)

1.Broken line indicate the wiring at site.

indicates the connection terminal.

Long dashed short dashed line indicate the accessories.

2. indicates the terminal block.

indicates the connector on the control P.C. board.

3. indicates the protection ground.

4. indicates the control P.C. board.

CN** Connector

Symbol Parts Name

Flow selector unit

FS Float Switch

FM Fan Motor

DM Drain Pump Motor

F301,302 Fuse

Earth screw

LM Louver Motor

PMV Pulse Motor Valve

RY302 Drain Control Relay

TA Indoor temp sensor

TB01,02 Terminal Block

Controller

Adapter for

Wireless Remote

Controller

Wired Remote

Power supply

Indoor unit

1~50Hz 220-240V

1~60Hz 220V

Earth screw

COLOR

TC1,2,TCJ Temp sensor

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Outdoor unit

Page 18

1-4. Concealed duct standard type

Models: MMD-AP0074BH-E(TR), AP0094BH-E(TR), AP0124BH-E(TR), AP0154BH-E(TR), AP0184BH-E(TR), AP0244BH-E(TR), AP0274BH-E(TR), AP0304BH-E(TR), AP0364BH-E(TR), AP0484BH-E(TR), AP0564BH-E(TR)

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

for Indoor Unit

Control P.C. Board

FS Float Switch

TA Indoor temp sensor

PMV Pulse Motor Valve

RY302 Drain Control Relay

TB01,02 Terminal Block

TC1,2,TCJ Temp sensor

(High ceiling

reshuffling)

Power

supply

circuit

Symbol Parts Name

CN** Connector

FM Fan Motor

DM Drain Pump Motor

F301,302 Fuse

1.Broken line indicate the wiring at site.

Long dashed short dashed line indicate the accessories.

2. indicates the terminal block.

indicates the connection terminal.

indicates the connector on the control P.C. board.

3. indicates the protection ground.

4. indicates the control P.C. board.

Controller

Adapter for

Wireless Remote

Controller

Wired Remote

Reactor

Outdoor unit

Power supply

1~50Hz 220-240V

1~60Hz 220V

Earth screw

Flow selector unit

Indoor unit

Earth screw

Page 19

1-5. Concealed duct high static pressure type

Models: MMD-AP0184H-E(TR), AP0244H-E(TR), AP0274H-E(TR), AP0364H-E(TR), AP0484H-E(TR)

Static

pressure tap

Motor over heating

protection switch

When drain

pump is installed

circuit

Power

supply

Fan motor wiring(MMD-)

Terminal

Sub P.C. Board

No.

AP0484 AP0184~AP0364

Wired for MMD-AP0484H-E only

Brown color wire.

F1 BLU(50/60Hz) Low tap

F2 ORN(50/60Hz) Middle tap

F3 BLK(60Hz) BLK(50/60Hz) High tap

F4 BRW(50Hz) — High tap

Fan motor inside wiring diagram (exp.)

(Refer tha static pressure specifications for each tap.)

for Indoor Unit

Control P.C. Board

Remote

Controller

unit

Line Filter

Outdoor

Fan motor Control Relay

Symbol Parts Name

43F1,F2

FFuse

CN** Connector

FM Fan Motor

F301 Fuse

Power supply

1~50Hz 220-240V

1~60Hz 220V

Indoor unit

Earth screw

Flow selector unit

Fan Motor Control Relay

RC Running Capacitor

PMV Pulse Motor Valve

TA Indoor temp sensor

RY002 Drain Control Relay

RY005,006,007

TC1,2,TCJ Temp sensor

TB01,02,03 Terminal Block

TR Transformer

FS Float Switch

DM Drain Pump Motor

indicates the connection terminal.

indicates the connector on the

Sold

Separately

1.Broken line indicate the wiring at site.

Long dashed short dashed line indicate

the accessories.

2. indicates the terminal block.

control P.C. board.

3. indicates the protection ground.

4. indicates the control P.C. board.

5.When installing the drain pump connect

the froat switch connector to CN30

connector.

block when change to static pressure.

Exchange the lead wire of arrow ( )

6. position is connected to terminal

COLOR

position after check the terminal

number as figure and lead wire's color

of fan motor.

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

pressure, the static pressure of high tap

is different by 50Hz or 60Hz.

7.Be careful when modify the static

Page 20

Models: MMD-AP0724H-E(TR), AP0964H-E(TR)

When drain

pump is installed

Fan motor inside wiring diagram

circuit

Power

supply

Sub P.C. Board

for Indoor Unit

Control P.C. Board

Motor over heating

protection switch

Fan motor Control Relay

Fan Motor Control Relay

Terminal Block

Remote

Controller

unit

Line Filter

Outdoor

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Power supply

1~50Hz 220-240V

1~60Hz 220V

Earth screw

Flow selector unit

Indoor unit

Earth screw

Note

Symbol Parts Name

43F1,F2

Pa (mmAq)

RC Running Capacitor

RY002 Drain Control Relay

TA Indoor temp sensor

04,05,06

TC1,2,TCJ Temp sensor

TB01,02,03,

RY005,006,007

FM Fan Motor

CN** Connector

F1,2,3 Fuse for Fan Motor

PMV Pulse Motor Valve

F301 Fuse

FS Float Switch

TR Transformer

DM Drain Pump Motor

indicates the connection terminal.

indicates the connector on the

Sold

Separately

Long dashed short dashed line indicate

the accessories.

1.Broken line indicate the wiring at site.

2. indicates the terminal block.

control P.C. board.

the froat switch connector to CN30

connector.

block when change to static pressure.

Exchange the lead wire of arrow ( )

position after check the terminal

number as figure and lead wire's color

of fan motor.

pressure, the static pressure of high tap

3. indicates the protection ground.

4. indicates the control P.C. board.

5.When installing the drain pump connect

6. position is connected to terminal

is different by 50Hz or 60Hz.

7.Be careful when modify the static

Static pressure

wiring

Fan motor

F1 YEL 69(7)

F2 BLU 137(14) Setting from factory

F3 ORN 196(20)

No.

Terminal

Page 21

1-6. Slim duct type

Models: MMD-AP0074SPH-E(TR), AP0094SPH-E(TR), AP0124SPH-E(TR), AP0154SPH-E(TR), AP0184SPH-E(TR)

(High ceiling

reshuffling)

circuit

Power

supply

Long dashed short dashed line indicate the

1.Broken line indicate the wiring at site.

indicates the connection terminal.

indicates the connector on the control P.C.

accessories.

board.

2. indicates the terminal block.

3. indicates the protection ground.

4. indicates the control P.C. board.

Earth screw

Flow selector unit

Control P.C. Board for

Power supply

1~50Hz 220-240V

1~60Hz 220V

Indoor Unit

Indoor unit

Earth screw

COLOR

IDENTIFICATION

Symbol Parts Name

RED : RED

WHI : WHITE

DM Drain Pump Motor

CN** Connector

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

FM Fan Motor

F301,302 Fuse

Outdoor unit

PNK : PINK

ORN : ORANGE

FS Float Switch

RY302 Drain Control Relay

Wired Remote

BRW : BROWN

GRN : GREEN

Terminal Block

TA Indoor temp sensor

TB01,02

Controller

Temp sensor

TC1,2,TCJ

Page 22

1-7. Ceiling type

Models: MMC-AP0154H-E(TR), AP0184H-E(TR), AP0244H-E(TR), AP0274H-E(TR), AP0364H-E(TR), AP0484H-E(TR)

When drain

pump is installed

Indoor Unit

Control P.C. Board for

(High ceiling

reshuffling)

Earth screw

Flow selector unit

Indoor unit

Earth screw

circuit

Power

supply

indicates the connection terminal.

indicates the connector on the control P.C.

Long dashed short dashed line indicate the

accessories.

1.Broken line indicate the wiring at site.

2. indicates the terminal block.

board.

3. indicates the protection ground.

Adapter for Wireless

Remote Controller

4. indicates the control P.C. board.

5.When installing the drain pump connect the froat

switch connector to CN34 connector.

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Terminal Block

Power supply

1~50Hz 220-240V

1~60Hz 220V

Outdoor unit

CN** Connector

Symbol Parts Name

F301,302 Fuse

LM Louver Motor

FM Fan Motor

PMV Pulse Motor Valve

RY302 Drain Control Relay

TA Indoor temp sensor

TB01,02

TC1,2,TCJ Temp sensor

FS Float Switch

DM Drain Pump Motor

Sold

Separately

Page 23

1-8. Floor standing cabinet type

Models: MML-AP0074H-E(TR), AP0094H-E(TR), AP0124H-E(TR), AP0154H-E(TR), AP0184H-E(TR), AP0244H-E(TR)

Indoor Unit

Control P.C. Board for

circuit

Power

supply

1.Broken line indicate the wiring at site.

Sub P.C. Board

Long dashed short dashed line indicate the

accessories.

indicates the connection terminal.

2. indicates the terminal block.

indicates the connector on the control P.C.

board.

3. indicates the protection ground.

4. indicates the control P.C. board.

Remote Controller

Earth screw

Flow selector unit

Indoor unit

Earth screw

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Power supply

1~50Hz 220-240V

1~60Hz 220V

Symbol Parts Name

CN** Connector

F301 Fuse

Line Filter

Fan Motor Control Relay

TA Indoor temp sensor

FM Fan Motor

RC Running Capacitor

PMV Pulse Motor Valve

RY005,006,007

TB01,02 Terminal Block

TC1,2,TCJ Temp sensor

TR Transformer

Outdoor unit

Page 24

1-9. Floor standing concealed type

Models: MML-AP0074BH-E(TR), AP0094BH-E(TR), AP0124BH-E(TR), AP0154BH-E(TR), AP0184BH-E(TR), AP0244BH-E(TR)

Indoor Unit

Control P.C. Board for

indicates the connection terminal.

indicates the connector on the control P.C.

Long dashed short dashed line indicate the

accessories.

1.Broken line indicate the wiring at site.

2. indicates the terminal block.

board.

3. indicates the protection ground.

4. indicates the control P.C. board.

Flow selector unit

Power

Earth screw

circuit

supply

Power supply

1~50Hz 220-240V

1~60Hz 220V

Sub P.C. Board

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Remote Controller

RC Running Capacitor

PMV Pulse Motor Valve

Fan Motor Control Relay

TA Indoor temp sensor

RY005,006,007

TR Transformer

TC1,2,TCJ Temp sensor

TB01,02,03 Terminal Block

Line Filter

Outdoor unit

FM Fan Motor

CN** Connector

F301 Fuse

Symbol Parts Name

Indoor unit

Earth screw

Page 25

1-10.Floor standing type

Models: MMF-AP0154H-E(TR), AP0184H-E(TR), AP0244H-E(TR), AP0274H-E(TR), AP0364H-E(TR), AP0484H-E(TR), AP0564H-E(TR)

Indoor Unit

Control P.C. Board for

indicates the connection terminal.

indicates the connector on the control P.C.

Long dashed short dashed line indicate the

accessories.

1.Broken line indicate the wiring at site.

2. indicates the terminal block.

board.

3. indicates the protection ground.

4. indicates the control P.C. board.

circuit

Power

supply

screw

unit Earth

Flow selector

Power supply

1~50Hz 220-240V

Line Filter

1~60Hz 220V

Sub P.C. Board

COLOR

IDENTIFICATION

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRW : BROWN

GRN : GREEN

Remote Controller

Outdoor unit

Fan Motor Control Relay

TA Indoor temp sensor

TB01,02,03 Terminal Block

TR Transformer

TC1,2,TCJ Temp sensor

CN** Connector

Symbol Parts Name

LM Louver Motor

FM Fan Motor

F301 Fuse

RC Running Capacitor

PMV Pulse Motor Valve

RY001 Louver Control Relay

RY005,006,007

Indoor unit

Earth screw

Page 26

2 Parts Rating

2-1. Indoor unit

Compact 4-way cassette type

Model MMU-AP 0074MH 0094MH 0124MH 0154MH 0184MH

Fan motor SWF-230-60-1R Motor for horizontal grille MP24Z3N Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF-3 EDM-B 40Y GT F-3 TA sensor Lead wire length: 155 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1400 mm Vinyl tube TC2 sensor Ø6 size lead wire length: 1500 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1400 mm Vinyl tube (Red) Float switch FS-0218-103 Drain pump motor ADP-1409

1-way cassette type

Model MMU-AP 0074YH 0094YH 0124YH

Fan motor AF-200-22-4N-1 Running capacitor for fan motor AC 400 V, 1 µF Drain pump motor PJD-05230TF-1 Float switch FS-0208-602 Control P.C. board transformer TT-13 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF TA sensor Lead wire length: 818 mm TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Model MMU-AP 0154SH 0184SH 0244SH

Fan motor SWF-280-60-1 Driving motor for horizontal grille MP24GA1 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B40YGTF-3 TA sensor Lead wire length: 155 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1100 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1100 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1100 mm Vinyl tube (Red) Float switch FS-0218-103 Drain pump motor ADP-1409

Page 27

Concealed duct standard type

Model MMD-AP 0074BH 0094BH 0124BH 0154BH 0184BH

Fan motor ICF-280-120-2 Drain pump motor ADP-1409 Float switch FS-0218-102 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF EDM-B40YGTF TA sensor Lead wire length: 618 mm TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Model MMD-AP 0244BH 0274BH 0304BH 0364BH 0484BH 0564BH

Fan motor ICF-280-120-1 ICF-280-120-2 Drain pump motor ADP-1409 Float switch FS-0218-102 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B40YGTF EDM-B60YGTF-1 TA sensor Lead wire length: 618 mm TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Concealed duct high static pressure type

Model MMD-AP 0184H 0244H 0274H 0364H 0484H

Fan motor STF-200-160-4B STF-200-160-4A STF-200-260-4C STF-200-260-4B Running condenser for fan motor AC 500 V, 4 µF AC 400 V, 8 µF AC 450 V, 6 µF AC 400 V, 8 µF Drain pump motor ADP-1409 Float switch FS-0218-102-6 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B40YGTF EDM-B60YGTF-1 TA sensor Lead wire length: 1200 mm TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Model MMD-AP 0724H 0964H

Fan motor STF-200-370-4A Running condenser for fan motor AC 450 V, 12 µF Drain pump motor ADP-1409 Float switch FS-0218-102-6 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-BAOYGTF-1 TA sensor Lead wire length: 818 mm TC1 sensor Ø4 size lead wire length: 2000 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 2000 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 2000 mm Vinyl tube (Red)

Page 28

Slim duct type

Model MMD-AP 0074SPH 0094SPH 0124SPH 0154SPH 0184SPH

Fan motor SWF-280-60-1 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF EDM-B40YGTF Drain pump motor ADP-1409 Float switch FS-0218-102 TA sensor Lead wire length: 1558 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Ceiling type

Model MMC-AP 0154H 0184H 0244H 0274H 0364H 0484H

Fan motor SWF-280-60-1 SWF-280-60-2 SWF-280-120-2 Driving motor for horizontal grille MP24GA1 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B40YGTF EDM-B60YGTF-1 TA sensor Lead wire length: 155 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Floor standing cabinet type

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

Fan motor AF-200-19-4F AF-200-45-4F AF200-70-4K Running condenser for fan motor AC450 V, 1.2 µF AC400 V, 1.8 µF AC450 V, 2 µF Transformer TT13 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF EDM-B40YGTF TA sensor Lead wire length: 818 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Floor standing concealed type

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

Fan motor AF-200-19-4G AF-200-70-4K Running condenser for fan motor AC450 V, 1.5 µF AC450 V, 1 µF AC450 V, 2 µF Transformer TT-13 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B25YGTF EDM-B40YGTF TA sensor Lead wire length: 818 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 2000 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 2000 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 2000 mm Vinyl tube (Red)

Page 29

Floor standing type

Model MMF-AP 0154H 0184H 0244H 0274H 0364H 0484H 0564H

Fan motor AF-200-37R AF-200-63T AF-200-110M-1 AF-200-160H-1 Running condenser for fan motor AC500 V, 3 µF AC500 V, 3.5 µF AC500 V, 4 µF Transformer TT-13 Pulse motor EDM-MD12TF-3 Pulse motor valve EDM-B40YGTF EDM-B60YGTF-1 Driving motor for vertical louver MT8-3-9 TA sensor Lead wire length: 1200 mm Vinyl tube TC1 sensor Ø4 size lead wire length: 1200 mm Vinyl tube (Blue) TC2 sensor Ø6 size lead wire length: 2000 mm Vinyl tube (Black) TCJ sensor Ø6 size lead wire length: 1200 mm Vinyl tube (Red)

Page 30

3 Refrigerant Cycle Diagram

Indoor unit

Liquid

side

Strainer

Pulse Motor

Valve (PMV)

Gas side

Sensor

(TC2)

Capillary tube

Sensor

(TCJ)

Heat exchanger at

indoor side

Fan

Sensor

(TA)

Sensor

(TC1)

Fan motor

CAUTION

MMU-AP0074YH, AP0094YH, AP0124YH type air conditioners have no TC2 sensor.

Explanation of functional parts in indoor unit

Functional part name Functional outline

Pulse Motor Valve

Temp. Sensor

PMV

1.TA

2.TC1

3.TC2

4.TCJ

(Connector CN082 (6P): Blue)

1) Controls super heat in cooling operation

2) Controls under cool in heating operation

3) Recovers refrigerant oil in cooling operation

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

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

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

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

1) Controls PMV super heat in cooling operation

2) [MMU-AP0074YH to AP0124YH only] Controls PMV under cool in heating operation

Page 31

4 Control Outline

 Indoor unit

Control specifications

NO. Item Specification outline Remarks

Upon power supply reset

Operation selection

1.Identification of outdoor unit When the power supply is reset, the outdoor unit is identified, and control is redirected according to the identification result.

2.Indoor fan speed and air flow direction control availability settings Settings such as indoor fan speed and air flow direction control availability are replaced on the basis of EEPROM data.

3.If power supply reset is performed in the wake of a fault, the check code is cleared. If the abnormality persists after the Start / Stop b utton on the remo te c ont ro ller is pressed to resume operation, the check code is redisplayed on the remot e controller.

1.The operation mode changes in response to an operation selection command issued via the remote controller.

Remote controller command Control outline

STOP Air conditioner shutdown

FAN Fan operation

COOL Cooling operation

DRY Drying operation

HEAT Heating operation

Ts: Temperature setting Ta: Room temperature

Room temp. control

Automatic capacity control

1.Adjustment range - remote controller temperature setting (°C)

COOL / DRY HEAT

Wired type 18~29 18~29

Wireless type 18~30 16~30

2.In heating operation, the temperature setting may be fine-tuned via the DN code “06”.

SET DATA 0 2 4 6 Temperature setting adjustment +0 °C +2 °C +4 °C +6 °C

Factory default

Model type SET DATA

Floor standing (standard, concealed, cabinet) 0

Other model 2

1.The outdoor unit determines the operational capacities of indoor units according to the difference between Ta and Ts.

Cooling Heating

Shift in heating suction temperature (not applicable to remote controller thermo operation)

Ts: Temperature setting Ta: Room temperature

Page 32

NO. Item Specification outline Remarks

Fan speed control

1.The fan operates in one of the four speed modes of “HIGH (HH)”, “MED (H)”, “LOW (L)” and “AUTO” on the basis of a command issued via the remote controller. (Concealed duct high static pressure type: HH only)

2.In AUTO fan speed mode, the air speed changes according to the difference between Ta and Ts.

HH > H+ > H > L+ > L > UL or LL

• Control is identical in remote controller thermo and body thermo operation.

Speed modes shown in < > apply to cooling operation under AUTO air conditioner operation mode.

• In AUTO fan speed mode, the fan speed remains the same for 3 minu te s each

time a speed change occurs. However, a speed change command issued via the remote controller can override this, and the fan speed changes accordingly.

• At the beginning of cooling operation, a higher speed (ste eper downward

temperature gradient) is c ho s e n.

• As long as the temperature difference remains on a boundary line, the f an speed

stays the same.

Figures inside ( ) applies to remote controller thermo operation. Figures outside ( ) applies to body thermo operation. Speed modes shown in < > apply to heating operation under AUTO air conditioner operation mode.

• In AUTO fan speed mode, the fan speed remains the same for 1 minute each

time a speed change occurs. However, a speed change command issued via the remote controller can override this, and the fan speed changes accordingly.

• At the beginning of heating operation, a higher speed (steeper upward

temperature gradient) is c ho s e n.

• As long as the temperature difference remains on a boundary line, the f an speed

stays the same.

• When TC2 60 °C, the fan speed is raised by one step.

3.If the air conditioner goes thermo OFF during heating operation, the fan speed drops down to LL (breeze).

DN code “32” “0000”: Body thermo “0001”: Remote controller thermo

TC2: Indoor heat exchanger sensor temperature

“HEATING STANDBY ” displayed

Page 33

NO. Item Specification outline Remarks

TCJ: Indoor heat exchanger sensor temperature

• In zones D and E, priority is given to the remote controller fan speed setting.

• In zone A, “HEATING STANDBY ” is displayed.

Cold air discharge prevention control

1.In heating operation, the upper limit of the fan tap is set according to t he lower o f whichever is the higher between TC2 sensor and TCJ sensor temperatures, on the one hand, and TC1 sensor temperature, on the other.

• If the fan continuously operates in zone B for 6 minutes, it aut omatical ly moves

into zone C.

• During defrosting, the control point is shifted by +6 °C.

Zone A:OFF Zone B:26 °C or above and

below 28 °C Breeze

Zone C:28 °C or above and

below 30 °C Low

Zone D:30 °C or above and

below 32 °C Medium

Zone E:High

Freeze prevention control (low temp. release)

1.During cooling, the air conditioner is operated in the manner described below according to the temperature readings of the TC1, TC2 and TCJ sensors.

• If zone J operation is detected for 5 minutes, the air conditioner is forced into

thermo OFF.

• In zone K, the timer is put on pause, with the current timer count retained.

• If zone I operation is detected, the timer count is cl eared, and the air conditioner

returns to normal operation.

• If continuous zone J operation forces the air conditioner into thermo OFF, the

indoor fan is operated in breeze mode until it moves into zone I. The control is terminated under the following conditions:

Termination conditions

1)TC1 12 °C, TC2 12 °C, and TCJ 12 °C

2)Passage of 20 minutes after stoppage

TC1 TC2, TCJ P1 10 °C (5 °C) -10 °C Q1 0 °C -14 °C

Temperature in ( ): If the temperature is below this value when the power is turned on, the air conditioner is forced into thermo OFF.

2.During cooling, the air conditioner is operated in the manner described below according to the temperature readings of the TC2 and TCJ sensors.

• If zone M operation is detected for 45 minutes, the air conditioner is forced into

thermo OFF.

• In zone N, the timer is put on pause, with the current timer count retained.

• When the air conditioner goes back into zone M, timer count is resumed from

the retained value.

• If zone L operation is detected, the timer count is cleared, a nd the air conditioner

returns to normal operation.

TC1: Indoor heat exchanger sensor temperature

Reset conditions

1)TC1 12 °C, TC2 12 °C and TCJ 12 °C

2)Passage of 20 minutes after stoppage

TC2, TCJ P2 5 Q2 -2.0

* With models without

TC2, TC2 is not part of the control parameters.

Page 34

NO. Item Specification outline Remarks

Cooling oil (refrigerant) recovery control

While the outdoor unit is recovering cooling oil (refrigerant ), the indoor units perform the following control tasks: [common for operational (cooling thermo ON / thermo OFF / FAN), as well as nonoperational indoor units]

1)Open the indoor PMV to a certain degree.

2)Engage in recovery control for a specified period of time and return to normal cooling operation at the end of this period upon terminating the control.

• Recovery operation normally takes place roughly every 2 hours.

• The opening position of the indoor PMV depending on the type and capacity of the indoor unit.

3)Operate the drain pump throughout the recovery control period and for about 1 minute after it.

Heating refrigerant (oil) recovery control

While the outdoor unit is recovering heating refr igerant (oil), the indoor units perform the following control tasks:

1)Open the indoor PMV to a certain degree.

2)Control the indoor fan according to the operation mode.

[Indoor units operating in heating thermo ON / OFF state]

Let the indoor fan continue operating, but turn it off if the te mperature of the indoor heat exchanger drops.

• Recovery operation normally takes place roughly every hour.

• The opening position of the indoor PMV depending on the type and capacity of the indoor unit.

[Indoor units operating in FAN mode]

Turn off the indoor fan and display “HEATING STANDBY ” on the remote controller.

[Non-operational indoor units]

Keep the indoor fan turned off.

3)Terminate the recovery operation depending on the TC2 temperature re ading. The timing of termination is determined by each indoor unit.

4)Operate the indoor fan and drain pump for about 1 minute after t he terminati on of the recovery operation. (Applicable to compact 4-way cassette type and 1way cassette type)

• For defrosting commencement conditions, see 5 Control Outline “

Defrosting control (reverse defrosting method)” in SMMS-i

Outdoor Unit Service Manual A10-005 above.

• The opening position of the indoor PMV depending on the type and capacity of the indoor unit.

Defrosting control

While the outdoor unit is engaged in defrosti ng control, the i ndoor units perform th e following control tasks:

1)Open the indoor PMV to a certain degree.

2)Control the indoor fan according to the operation mode.

[Indoor units operating in heating thermo ON / OFF state]

Let the indoor fan continue operating for a while, but turn i t off as the temperature of the indoor heat exchanger drops.

[Indoor units operating in FAN mode]

Let the indoor fan continue operating.

[Non-operational indoor units]

Keep the indoor fan turned off.

3)As defrosting control comes to an end, it gives way to heating refrigerant (oil) recovery control. (For control details, see “9. Heating refrigerant (oil) recovery control” above.)

Short intermittent operation

compensation

1.For 5 minutes after startup, the system is forced to continue operating even if it reaches the thermo OFF region.

2.However, priority is given to cooling / heating selection, operation standby, and protective control, so that there is no overriding of thermo OFF in these cases.

control Drain pump

control

1.During cooling (including DRY operation), the drain pump is operated at all times.

2.If the float switch is activated while the drain pump is in operation, the drain pump

Check code [P10]

continues operating, with the relevant check code displayed.

3.If the float switch is activated while the drain pump is turned off, thermo OFF is forced on the air conditioner, with the drain pump put into operation. If the float switch continues to be activated for ab out 5 minutes, the drain pump is turned o ff, with the relevant check code displayed.

Elimination of

residual heat

1.When the air conditioner is turned off after engaging in heating operation, the indoor fan is operated for about 30 seconds in “breeze” mode.

Page 35

NO. Item Specification outline Remarks

Filter sign display (not applicable to wireless type) * Provided in

the separately mounted type,

1.The indoor fan’s cumulative hours of operation are counted, and when these exceed the prescribed value (150H / 2500H), a filter replacement signal is sent to the remote controller to display a filter sign on it.

2.When a filter reset signal is received from the remote controller, the timer measuring cumulative hours is cleared. If the prescribed hours have been exceeded, the hours count is reset, with the sig n on th e remote controller di splay erased.

“FILTER ” displayed

TCB-AX21E.

Filter service life 2500H 150H

Type

4-way cassette type 1-way cassette type (SH, YH) 2-way cassette type Ceiling type Concealed duct standard type Concealed duct high static pressure type Slim duct type

High wall type Floor standing type Floor standing concealed type Floor standing cabinet type

Operation standby Heating standby

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

1.When any of the DN codes listed below is displayed

• “P05” - Detection of an open phase in the power supply wiring

• “P10” - Detection of indoor flooding in at least one indoor unit

• “L30” - Detection of an interlock alarm in at least one indoor unit

2.Forced thermo OFF

• “COOL / DRY” operation is unavailable because at least one indoor unit is

operating in “HEAT” mode.

• “HEAT” operation is unavailable because at least one indoor unit is operating in

“COOL / DRY” mode under priority cooling setting (bit 1 of SW11 on outdoor I/ F P.C. board ON).

3.All indoor units not able to engage in any of the above operations stand by in thermo OFF state.

4.The indoor fan has been turned off because the system is engaged in a heat refrigerant (oil) recovery operation.

<Heating standby> .......... Displayed on remote controller

1.Normal thermo OFF

• During heating, the indoor unit goes thermo OFF as the heating temperature

setting is reached.

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

3.Forced thermo OFF

• “HEAT” operation is unavailable because at least one indoor unit is operating in

“COOL / DRY” mode under priority cooling setting (bit 1 of SW11 on outdoor I/ F P.C. board ON).

• “OPERATION STANDBY ” displayed

No display provided on wireless remote controller

• “HEATING STANDBY ” displayed

Page 36

NO. Item Specification outline Remarks

Selection of central control mode

1.The range of operations that can be performed via an indoor unit remote controller can be determined through the setting of the central controller.

2.Setting details

TCC-Link central contro l

Operation

via TCC-

Link central

control

IndividualOOOOOO Central 1 Central 2 Central 3 O Central 4 O

(O: Accessible ×: Inaccessible)

Start / stop

selection

Operation

××××

Operation via RBC-AMT32E

mode

selection

Timer

Temperature

setting

O OOOO

Fan speed

setting

OOO

Air flow

direction

setting

OO OO

RBC-

AMT32E

display

“CENTRAL CONTROL

PROGRESS”

• In the case of a wired remote controller, “CENTRAL CONTROL IN PROGRESS ” is displayed (lit up) while in central control mode.

• The display blinks when a control function inaccessible to a remote controller is chosen.

• A wireless remote controller has the same set of control functions, although there is no display. When a control operation is performed via a wireless remote controller while in central control mode, a peep sound alert (5 times) is provided.

Louver control 1.Louver position setting

• When the louver position is changed, the louver turns all the way down before settling in the set position.

• Louver position is adjustable in the range shown in the diagrams below.

During cooling / drying During heating / fan-only operation

• During group operation, position setting can be performed individually or collectively.

2.Swing setting

• The “SWING” sign is displayed, along with alterna ting images as shown below.

In all operation modes

(alternating)

• During group operation, swing setting can be performed individually or collectively.

3.Set louver positions

4-way 1-way (SH) Ceiling

Normal stop Downward Closed Horizontal

Abnormal stop Downward No change Horizontal

Heating standby Upward Upward Horizontal

Oil / refrigerant recovery Upward Upward Horizontal

DC motor 1.When the fan is turned on, the positions of the stator and rotor are determined.

(The motor turns in incremental steps.)

2.The fan operates in accordance with commands issued by the indoor controller. Note:

If the fan is rotating while the air condit ioner is turned off due to an inflow of outs ide air or some other reason, the indoor unit may operate without turning on the fan motor.

Note:

If fan motor lock is detected, the indoor unit is turned off, with an error display provided.

Check code “P12”

Page 37

NO. Item Specification outline Remarks

Power saving mode

1.Push the button on the remote controller

2.The " " segment lights up on the wire d remote controller display.

3.The requirement capacity ratio is limited to approximately 75 %.

4.If the power saving operation is enabled, the settings are retained when the operation is stopped, when the mode is cha nged, or when the power is reset . The power saving operation will be enabled the next time the operation starts.

The power saving operation cannot be set by the wireless remote controller or wired remote controller of AMT31E or older.

Page 38

5 Applied Control and Functions

(Including Circuit Configuration)

5-1. Indoor controller block diagram

5-1-1. When main (sub) remote controller connected

adaptor is installed with 2

main (sub) remote controllers

connected.

be installed in one unit.

connected to a sub remote

controller.

*3 A weekly time r cann ot be

unit

Outdoor

Sameas left

Power

source

unit

Outdoor

Power

source

LCD

Schedule Timer (Weekly timer mode)

Up to 8 units can be connected. *1*1 Only up to 7 units if a network

Key switch

Function setting

driver

LCD

Display

Rechargeable

battery

circuit

Power

supply

*2 The net work adaptor ca n only

Main (sub) remote controller (up to 2 units)

Display

circuit

Power

Key switch

Function setting

CPU

LED

LCD

Display

EEPROM

Main remote controller

:RBC-AMT32E

Sub remote controller

supply

Remote controller

communication circuit

:RBC-AS21E2

Indoor unit

EEPROM

Remote

Indoor control P.C. board (MCC-1402)

Remote controller

Network

adaptor P.C.

Network adaptor (optional)

controller

communication

TA sensor

TCI sensor

TC2 sensor

circuit

communication

circuit

board

(MCC-1401)

Switch setting

circuit

Power supply circuit

AI-NET

communication

Driver

TCJ sensor

Transformer

Float input

BUS

circuit

communication

synchronization

signal input circuit

FAN

Alarm

HEAT

COOL

In operation

Getting ready

Thermostat ON

External output

Fan motor

control circuit

Power supply circuit

motor

Louver

standard type Slim Duct Type

*Not applicable to conceale d duct

fan

Drain

motor

pump

Indoor

Indoor / outdoor communication

unit

Outdoor

Power source

1Ø 220 V, 60 Hz

1Ø 220-240 V, 50 Hz

TCB-PCNT30TLE2

Network adaptor : "1:1 model" connection interface

of 1:1

remote

Central

controller

model)

(In case

(optional)

Page 39

<1-way cassette (YH) type, floor standing type, concealed duct high static pressure type, floor standing concealed type, floor standing cabinet type>

network adaptor is

installed with 2 main

(sub) remote controllers

connected.

only be installed in one

unit.

connected to a sub

Up to 8 units can be

connected. *1

*1 Only up to 7 units if a

Key switch

Function setting

LCD

driver

LCD

Display

Schedule Timer (Weekly timer mode)

Rechargeable

battery

circuit

Power

supply

*2 The network adaptor can

remote controller.

*3 A weekly timer cannot be

unit

Outdoor

Sameas left

Power

source

unit

Outdoor

Power

source

circuit

Power

Key switch

Function setting

supply

EEPROM

Remote

LED

LCD

Display

Main (sub) remote controller (up to 2 units)

EEPROM

Remote controller

communication circuit

TA sensor

TCI sensor

TC2 sensor

circuit

controller

communication

Float input

TCJ sensor

air discharge cassette

type (compact)

*Not applicable to 1-way

Driver

duct high static pressure type

*Not applicable to concealed

BUS

circuit

communication

synchronization

signal input circuit

FAN

Alarm

HEAT

COOL

Getting ready

Thermostat ON

In operation

External

output

Fan motor

relay circuit

Indoor / outdoor communication

unit

Outdoor

Power source

1Ø 220 V, 60 Hz

1Ø 220-240 V, 50 Hz

Transformer

Main remote controller

:RBC-AMT32E

Sub remote controller

:RBC-AS21E2

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

circuit

communication

Remote controller

board

Network

Network adaptor (optional)

Indoor unit

AI-NET

(MCC-1401)

adaptor P.C.

Power supply circuit

motor

Drain

Switch setting

circuit

Power supply circuit

communication

Transformer

Louver

only

*1-way Type

fan

pump

motor

Indoor

concealed duct high

static pressure type

*Not applicable to

TCB-PCNT30TLE2

Network adaptor : "1:1 model" connection interface

of 1:1

remote

Central

controller

model)

(In case

(optional)

Page 40

5-1-2. When wireless remote controller kit connected

network adaptor is

installed with 2

wireless remote

controller kits

connected.

can only be installed in

Up to 8 units can be

connected. *1

*1 Only up to 7 units if a

one unit.

*2 The network adaptor

unit

Outdoor

Sameas left

Power

source

unit

Outdoor

Power

source

communication

Function

operation SW

setting SW

Display LED

circuit

Buzzer

circuit

Sensor circuit

Emergency

Sensor P.C. board

Wireless remote c o nt roller kit

Remote controller

Power supply

EEPROM

Remote

controller

communication

TA sensor

TCI sensor

circuit

Float input

TCJ sensor

TC2 sensor

duct high static pressure type

*Not applicable to concealed

Driver

BUS

circuit

communication

synchronization

signal input circuit

FAN

Alarm

HEAT

COOL

Getting ready

Thermostat ON

In operation

External

output

Fan motor

relay circuit

Indoor / outdoor communication

unit

Outdoor

Power source

1Ø 220 V, 60 Hz

1Ø 220-240 V, 50 Hz

Network adaptor (optional)

Indoor unit

Indoor control P.C. board (MCC-1402)

Network

Power supply circuit

motor

circuit

communication

Remote controller

board

(MCC-1401)

adaptor P.C.

Central

Switch setting

Power supply circuit

circuit

AI-NET

communication

remote

controller

(optional)

Transformer

of 1:1

model)

(In case

Louver

standard type Slim Duct Type

*Not applicable to concealed duct

fan

Drain

motor

pump

Indoor

TCB-PCNT30TLE2

Network adaptor : "1:1 model" connection interface

Page 41

<1-way cassette (YH) type, floor standing type, concealed duct high static pressure type, floor standing concealed type, floor standing cabinet type>

network adaptor is

installed with 2

wireless remote

controller kits

connected.

can only be installed in

Up to 8 units can be

connected. *1

*1 Only up to 7 units if a

one unit.

*2 The network adaptor

unit

Outdoor

Sameas left

section

Wireless remote controller kit

Display

Power

source

unit

Outdoor

Power

source

circuit

communication

Remote controller

circuit

Sensor

Indoor unit

EEPROM

Remote

controller

TA sensor

TCI sensor

circuit

Float input

TCJ sensor

TC2 sensor

duct high static pressure type

*Not applicable to concealed

BUS

circuit

communication

Indoor / outdoor communication

unit

Outdoor

communication

Driver

synchronization

signal input circuit

Power source

1Ø 220 V, 60 Hz

FAN

HEAT

Alarm

COOL

Thermostat ON

Getting ready

External

output

In operation

Fan motor

relay circuit

1Ø 220-240 V, 50 Hz

Transformer

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

circuit

communication

Remote controller

board

Network

(MCC-1401)

adaptor P.C.

Power supply circuit

fan

motor

Drain

Switch setting

Power supply circuit

circuit

AI-NET

communication

Transformer

Louver

*1-way Type only

motor

Indoor

pump

TCB-PCNT30TLE2

concealed duct

high static

pressure type

*Not applicable to

Network adaptor : "1:1 model" connection interface

Network adaptor (optional)

of 1:1

remote

Central

controller

model)

(In case

(optional)

Page 42

5-1-3. When both main (sub) remote controller and wireless

remote controller kit connected

if a network

adaptor is

installed.

adaptor can only

be installed in

one unit.

cannot be

connected to a

sub remote

controller.

*3 A weekly timer

unit

Outdoor

Sameas left

Power

source

Outdoor

source

unit

Schedule Timer (Weekly timer mode)

LCD

Display

driver

LCD

Up to 8 units can be

connected. *1

*1 Only up to 7 uni ts

Key switch

Function setting

Sensor P.C. board

Rechargeable

battery

circuit

Power

supply

Wireless remote c ontroller kit

Remote controller

Emergency

communication

operation SW

circuit

Power supply

*2 The networ k

Function

setting SW

Buzzer

Display LED

Sensor circuit

circuit

Power

:RBC-AS21E2

supply

Remote controller

communication circuit

Indoor unit

Key switch

Function setting

LED

LCD

Display

Main (sub) remote controller (up to 2 units)

EEPROM

Main remote controller

:RBC-AMT32E

Sub remote controller

EEPROM

Remote

Indoor control P.C. board (MCC-1402)

Remote controller

Network

adaptor P.C.

Network adaptor (optional)

TA sensor

TCI sensor

circuit

controller

communication

circuit

communication

board

(MCC-1401)

Switch setting

circuit

Power supply circuit

AI-NET

communication

Float input

TCJ sensor

TC2 sensor

Driver

duct high static pressure type

*Not applicable to concealed

Transformer

BUS

circuit

communication

synchronization

signal input circuit

FAN

Alarm

HEAT

COOL

In operation

Getting ready

Thermostat ON

External output

Fan motor

control circuit

Power supply circuit

fan

Drain

motor

Louver

standard type Slim Duct Type

*Not applicable to concealed duct

motor

pump

Indoor

Network adaptor : "1:1 model" connection interface

Indoor / outdoor communication

TCB-PCNT30TLE2

Outdoor

unit

Power source

1Ø 220 V, 60 Hz

1Ø 220-240 V, 50 Hz

of 1:1

remote

Central

controller

model)

(In case

(optional)

Page 43

<1-way cassette (YH) type, floor standing type, concealed duct high static pressure type, floor standing concealed type, floor standing cabinet type>

if a network

adaptor is

installed.

adaptor can only

be installed in

one unit.

cannot be

connected to a

sub remote

*3 A weekly timer

Sameas left

circuit

Display

Sensor

controller.

section

circuit

unit

Outdoor

Power

source

unit

Outdoor

Power

source

Schedule Timer (Weekly timer mode)

Up to 8 units can be

connected. *1

*1 Only up to 7 units

Key switch

Function setting

LCD

driver

LCD

Display

Rechargeable

battery

circuit

Power

supply

*2 The network

Wireless remote controller kit

communication

Remote controller

Main (sub) remote controller (up to 2 units)

circuit

Power

Key switch

Function setting

LED

LCD

Display

EEPROM

supply

Remote controller

communication circuit

EEPROM

Remote

controller

communication

TA sensor

TCI sensor

circuit

Float input

TCJ sensor

TC2 sensor

duct high static pressure type

*Not applicable to concealed

Driver

BUS

circuit

communication

synchronization

signal input circuit

FAN

Alarm

HEAT

COOL

Thermostat ON

In operation

Getting ready

External

output

Fan motor

control circuit

Indoor / outdoor communication

unit

Outdoor

Power source

1Ø 220 V, 60 Hz

1Ø 220-240 V, 50 Hz

Transformer

Main remote controller

:RBC-AMT32E

Sub remote controller

:RBC-AS21E2

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

circuit

communicat ion

Remote contro ller

board

AI-NET

communication

(MCC-1401)

adaptor P.C.

Network adaptor (optional)

Indoor unit

Network

Power supply circuit

fan

Drain

motor

pump

Switch setting

Louver

motor

Indoor

TCB-PCNT30TLE2

concealed duct

high static

circuit

Power supply circuit

Transformer

*1-way Type only

pressure type

*Not applicable to

Network adaptor : "1:1 model" connection interface

of 1:1

remote

Central

controller

model)

(In case

(optional)

Page 44

5-2. Indoor printed circuit board

MCC-1402 <compact 4-way cassette type, 1-way cassette (SH) type, ceiling type, concealed duct standard type, slim duct type>

High-ceiling adjustment input

EEPROM

Power supply

Optional power supply

Remote controller

power source LED

Drain pump output

Remote controller jumper

TCI sensor

Indoor / outdoor communication

(doubling as central control communication)

Indoor / outdoor communication (backup)

TC2 sensor

External error input

Filter / optional error input

Microcomputer operation LED

TCJ sensor

EXCT

DISP

(Used for servicing)

TA sensor

HA (T10)

CHK

(Used for servicing)

Optional output

Fan output

PMV output

DC fan output

DC fan return

Float SW

Louver

Page 45

MCC-1403 <1-way cassette (YH) type, floor standing type, concealed duct high static pressure type, floor standing concealed type, floor standing cabinet type>

Used for

DISP

servicing

CHK

TCI sensor

Indoor / outdoor communication

Remote

controller power

source LED

(doubling as central

control communication)

Indoor / outdoor communication

(backup)

HA (T10)

Optional output

Remote

controller jumper

EEPROM

PMV output

Microcomputer

operation LED

TC2 sensor

External error

input

Float SW

EXCT

Filter / optional error input

TCJ sensor

in concealed duct

* Short plug inserted

TA sensor

Power supply transformer (secondary side)

(AC 11, 14, 20 V)

AC fan output

Power supply

Power

supply

transformer

(primary

side)

Louver

Drain pump

output

Optional

power supply

Page 46

5-3. Optional connector specifications of indoor P.C.

board

Function Connector No. Pin No. Specification Remarks

Fan output

CN32

CN61

Optional output

CN60

External error input

CHK Operation check

DISP Display mode CN72

EXCT Demand

CN80

CN71

CN73

1 DC12 V Factory default setting: ON when indoor unit in

Output

Start / stop input Start / stop input for HA (J01: In place / Removed =

1 20 V (COM)

Remote controller disabling

input 4 In-operation output ON during operation (HA answerback signal) 5 DC12 V (COM) 6 Alarm output ON while alarm ON 1 DC12 V (COM) 2 Defrosting output ON while outdoor unit defrosted 3 Thermostat ON output ON while real thermostat ON (compressor ON)

Cooling output ON while air conditioner in cooling or re lated operation 4

Heating output ON while air condi tioner i n he ati ng operat io n (HEAT or 5

Fan output ON while indoor fan ON (air cleaner in use or via 6

1 DC12 V (COM) Generates test code L30 and automatically shu ts down 2 DC12 V (COM) 3 External error input 1 Check mode input Used for indoor operation check (prescribed operational

0 V 2

1 Display mode input Product display mode - Communication just between

0 V

2 1 Demand input Imposes thermostat OFF on indoor unit

20 V

operation and OFF when indoor unit at rest * Fan can be operated on its own by pressing FAN

button on remote controller (DN = 31)

Pulse input (factory default) / Step input)

Enables / disables start / stop control via remote controller

(COOL, DRY or cooling under AUTO mode)

heating under AUTO mode)

interlock wiring)

air conditioner (only if condition persists for 1 minute)

status output, such as indoor fan "H" or drain pump ON, to be generated without communication with outdoor unit or remote controller)

indoor unit and remote controller enabled (upon turning on of power) Timer short-circuited out (always)

Page 47

5-4. Test operation of indoor unit

▼ 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 controller or the outdoor unit. This functio n 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 (CN71 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 (CN72 on the indoor P.C. board) in addition to short-circuit of CHK pin (CN71 on the indoor P.C. board), the minimum opening degree (30 pls) can be set to the indoor PMV only. When open DISP pin, the maximum opening degree (1500 pls) 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

Normal time

DISP pin open DISP pin short circuit

Fan motor (H) (H) Stop Indoor PMV (*) Max . opening degree (1500 pls ) Min. opening degree (30 pls) Min. opening degree (30 pls) Louver Horizontal Horizontal Immediate stop Drain pump ON ON ON Communication All ignored All ignored All ignored P.C. board LED Lights Lights Flashes

Abnormal time

• To exchange the indoor PMV coil, set the indoor PMV to Max. opening degree.

• For the detailed positions of CHK pin (CN71 on indoor P.C. board) and DISP pin (CN72 on indoor P.C. board), refer to the indoor P.C. board MCC-1570.

Page 48

5-5. Method to set indoor unit function DN code

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

<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 gr oup control.

Then the fan and louver of the selected indoor unit move.

2 Each time the “Select unit” side of the button is pressed,

one of the indoor unit Nos. under group control is displayed in turn. Then the fan and louver of the selected indoor unit move.

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

desired function.

4 Use the button to select the desired SET DATA associated

with the selected function.

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

steady.)

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

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

6 When the button is pushed, the system returns to norma l of f state.

Page 49

Function CODE No. (DN Code) table (includes all functions needed to perform applied control on site)

DN Item Description At shipment

Filter display delay timer 0000: None

Dirty state of filter 0000: Standard

Central control address 0001: No.1 unit

Specific indoor unit

priority Heating temp shift 0000: No shift

Existence of [AUTO]

mode Cooling only 0000: Heat pump

Type 0001: 4-way Cassette etc.

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

11 12 Line address 0001: No.1 unit to 0030: No.30 unit 0099: Unfixed

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

Group address 0000: Individual

Louver type (Air direction

adjustment)

Temp difference of [AUTO] mode selection

COOL → HEAT, HEAT → COOL

Automatic restart of

power failure Selection of option / error

input (CN70) HA terminal (CN61)

select 31 Ventilating fan control 0000: Unavailable 0001: Available 0000: Unavailable 32 TA sensor selection 0000: Body TA sensor 0001: Remote controller sensor 0000: Body TA sensor 33 Temperature unit select 0000: °C (at factory shipment) 0001: °F 0000: °C

0002: 2500H 0004: 10000H

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

to 0064: No.64 unit 0099: Unfixed

0099: Unfixed 0000: No priority 0001: Priority 0000: No priority

0002: +2 °C to

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

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

* refer to 50 page Type CODE No. [10]

0002: Follower unit of group 0000: No louver 0001: Swing only According to type 0002: (1-way Cassette type, Ceiling type)

0003: (2-way Cassette type) 0004: (4-way Cassette type)

0000: 0 deg to 0010: 10 deg 0003: 3 deg (For setup temperature, reversal of COOL / HEAT by ± (Data value) / 2)

0000: None 0001: Restart 0000: None

0000: Filter input 0002: None

0000: Usual 0002: Fire alarm input

0001: 150H 0003: 5000H

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

0001: Header unit of group 0099: Unfixed

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

0001: Leaving-ON prevention control 0000: Usual

According to type

0000: Standard

0002: +2 °C (Floor type 0000: 0 °C)

0001: Not provided

0000: Heat pump

Depending on model type

type

(Ts±1.5)

(HA terminal)

Page 50

DN Item Description At shipment

High-ceiling adjustment

(Air flow selection)

1-way cassette (SH)

Value Type AP015, AP018 AP024

0000 Standard (factory default) 3.5 m or less 3.8 m or less 0001 High-ceiling (1) 4.0 m or less 4.0 m or less 0003 High-ceiling (3) 4.2 m or less 4.2 m or less

0000: Standard

Compact 4-way cassette

SET

DATA

0000 Standard (factory default) 2.7 m or less 2.9 m or less 3.2 m or less 0002 High-ceiling (2) — 3.2 m or less 3.4 m or less 0003 High-ceiling (3) — 3.5 m or less 3.5 m or less

Type

AP007 to

AP012

AP015 AP018

Ceiling

Value Type AP015 to AP056

0000 Standard (factory default) 3.5 m or less 0001 High-ceiling (1) 4.0 m or less

Built-in filter 4-way cassette

0000: Standard filter (factory default) Ceiling 0000: Standard filter (factory default) Concealed duct standard 0000: Standard filter (factory default) 0001: High-performance filter (65 %, 90 %)

Static pressure selection Concealed duct standard

0000: Standard (factory default) 0001: High static pressure 1 0003: High static pressure 2 0006: Low static pressure

Timer setting 60

(wired remote controller)

External interlock 92

release condition

Whether the power

saving mode can be set

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

0000: Operation stopped 0001: Release signal received 0000: Operation

0000: Invalid 0001: Valid 0001: Valid

Slim Duct 0000: Standard (factory default) 0001: High static pressure 1 0003: High static pressure 2 0006: High static pressure 3

0000: Available

performed)

stopped

by the remote controller

Page 51

Type DN code “10”

Value Type Model

0000 1-way Cassette MMU-AP∗∗∗SH

0001*14-way Cassette MMU-AP∗∗∗H

0002 2-way Cassette MMU-AP∗∗∗WH 0003 1-way Cassette (Compact) MMU-AP∗∗∗YH 0004 Concealed Duct Standard MMD-AP∗∗∗BH 0005 Slim Duct MMD-AP∗∗∗SPH (SH) 0006 Concealed Duct High Static Pressure MMD-AP∗∗∗H 0007 Ceiling MMC-AP∗∗∗H 0008 High Wall MMK-AP∗∗∗H 0010 Floor Standing Cabinet MML-AP∗∗∗H 0011 Floor Standing Concealed MML-AP∗∗∗BH 0013 Floor Standing MMF-AP∗∗∗H 0014 Compact 4-way Cassette MMU-AP∗∗∗MH 0016 Fresh Air Intake indoor unit (Duct type) MMD-AP∗∗∗HFE

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

Indoor Unit Capacity DN code “11”

Value Capacity

0000* Invalid

0001 007 type 0003 009 type 0005 012 type 0007 015 type 0009 018 type 0011 024 type 0012 027 type 0013 030 type 0015 036 type 0017 048 type 0018 056 type 0021 072 type 0023 096 type

~–

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

Page 52

5-6. Applied control of indoor unit

Control system using remote controller interface (TCB-IFCB4E2)

Wiring and setting

• In the case of group control, the control system functions as long as it is connected to one of the indoor units (control P.C. board) in the group. If it is desired to access the operation and error statuses of other units, relevant signals must be brought to it from those units individually.

▼ Control items

(1)Start / Stop input signal Start / stop of unit (2)In-operation signal Output present while unit in normal operation (3)Error signal Output present while alarm (e.g. seri al communication error or operation of pr otective

device for indoor / outdoor unit) being activated

▼ Wiring diagram of control system using remote controller interface (TCB-IFCB4E2)

Input IFCB4E2: No-voltage ON / OFF serial signal Output No-voltage contact (in-operation and error indication)

Contact capacity: Max. AC 240 V, 0.5 A

Indoor control P.C. board

Start / stop input

COM (GND)

Remote controller disabling / enabling input

In-operation signal output

COM (+12V)

Error signal output

ON side Start signal input

OFF side Stop signal input

COM

(yellow)

In-operation signal output

Error signal output

Power source 220-240 V

Page 53

▼ Ventilating fan control from remote controller

[Function]

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

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

are simultaneously operable.

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 button, the indoor unit numbers in group control are displayed

successively.

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

3 Using the setup temp or button, specify the CODE No. 31. 4 Using the timer time or button, select the SET DATA. (At shipment: )

The setup data are as follows:

SET DATA 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 (DC12 V, procured locally) Corresponds to the relay up to one that the rated current of the operation coil is approx. 75 mA

Outside control input of fan

To terminal

Indoor control P.C. board

Note) Determine the cable length between the indoor

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

Compact 4-way Cassette type 1-way Cassette type (SH) Concealed Duct Standard type Slim Duct type Ceiling type Corresponds up to a relay in which rated current of the operation coil is approx. 75 mA Other type models: Correspond up to a relay in which rated current of the operation coil is approx. 16 mA (Does not correspond to a terminal block type relay on the market.)

model :

Page 54

▼ 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 forgotten-OFF of the indoor unit can be protected.

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

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

1. Control items

1) Outside contact ON: The start / stop operation from the remote controller is allowed.

(Status that card is inserted in the card switch box)

2) Outside contact OFF: If the indoor unit is operating, it is stopped forcedly.

(Start / Stop prohibited to remote controller) (Status that card is taken out from the card switch box)

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

contact.

2. Operation

Handle the wired remote controller switch in the following procedure.

* Use the wired remote controller switch during stop of the system.

1 Push concurrently + + buttons for 4 seconds or more. 2 Using the setup temp or button, specify the CODE No. . 3 Using the timer time or button, set to the SET DATA. 4 Push button. 5 Push button. (The status returns to the usual stop status.)

3. Wiring

Relay (procured locally)

* In the figure, the contact

Indoor control P.C. board

Note) Determine the cable length between the indoor control P.C. board an d the relay wit hin 2 m.

▼ Power peak-cut from indoor unit

When the relay is turned on, a forced thermo st at -O FF op er a tion s ta rts .

• Wiring example

(2P plug: RED)

Relay (procured locally)

Relay coil signal

Power supply

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

Note) Determine the cable length between the indoor

or outdoor control P.C. board and the relay wi thin 2 m.

indicates a status that the card is taken out.

Indoor control P.C. board

Page 55

Manual address setting using the remote controller

Procedure when setting indoor units’ addresses first under the condition that indoor wiring has bee n completed and outdoor wiring has not been started (manual setting using the remote controller)

▼ Wiring example of 2 refrigerant lines

Refrigerant line 1

Outdoor

unit

Indoor unit 1

Remote

controller

Line (system) address 1 1 1 2 2 Indoor unit address 1 2 3 1 2

Group address

Header unit2Follower unit2Follower unit

Indoor unit 2

Indoor unit 3

Refrigerant line 2

Outdoor

unit

Indoor unit 1

Follower unit2Follower unit

Indoor unit 2

In the example above, disconnect the remote con troller connections between the indoor units and connect a wired remote controller to the target unit directly before address setting.

SET DATA

CODE No.

Pair the indoor unit to set and the remote controller one-to-one.

Turn on the power.

1 Push and hold the , , and buttons at the same time for more than 4 seconds.

LCD starts flashing.

Page 56

2 Push the TEMP. / buttons repeatedly to set the CODE No. to . 3 Push the TIME / buttons repeatedly to set a system address.

(Match the address with the address on the interface P.C. board of the header outdoor unit in the same refrigerant line.)

4 Push button.

(It is OK if the display turns on.)

5 Push the TEMP. / buttons repeatedly to set the CODE No. to . 6 Push the TIME / buttons repeatedly to set an indoor unit address. 7 Push the button.

(It is OK if the display turns on.)

8 Push the TEMP. / buttons repeatedly to set the CODE No. to . 9 Push the TIME / buttons repeatedly to set a group address. If the indoor unit is individual,

set the address to ; header unit, ; follower unit, .

Individual : 0000 Header unit : 0001 In case of group Follower unit : 0002

Push the button.

(It is OK if the display turns on.)

Push the button.

The address setting is complete. ( fla she s. You ca n con tr ol the un it aft er has disappeared.)

NOTE

1. Do not use address numbers 29 or 30 when setting system addresses using the remote controller. These 2 address numbers cannot be used on outdoor units and the CODE No. [E04] (Indoor / outdoor communication error) will appear if they are mistakenly used.

2. If you set addresses to indoor units in 2 or more refrigerate lines manually using the remote controller and will control them centrally, set the header outdoor unit of each line as below.

• Set a system address for the header outdoor unit of each line with SW13 and 14 of their interface P.C. boards.

• Turn off dip switch 2 of SW30 on the interface P.C. boards of all the header outdoor units connected to the

same central control, except the unit that has th e lo we st address. (For unifying the termination of the wiring for the central control of indoor and outdoor units)

• Connect the relay connectors between the [U1, U2] and [U3, U4] terminals on the header outdoor unit of each

refrigerate line.

• After finishing all the settings above, set the address of the central control devices. (For the setting of the

central control address, refer to the installation manuals of the central control devices.)

control

Page 57

Confirming the indoor unit addresses and the position of an indoor unit using the remote controller

◆ Confirming the numbers and positions of indoor units

To see the indoor unit address of an indoor unit which you know the position of

▼ When the unit is individual (the indoor unit is paired with a wired remote controller one-to-one), or

it is a group-controlled one.

Starts running

(Execute it while the units are running.)

1 Push the button if the units stop. 2 Push the button (left side of the button).

A unit numbers is indicated on the LCD (it will disappear after a few seconds). The indicated number shows the system address and indoor unit address of the unit. When 2 or more indoor units are connected to the remote controller (group-controlled units) , a number of other connected units appears each time you push the button (left side of the button).

Page 58

To find an indoor unit’s position from its address

▼ When checking unit numbers controlled as a group

Stop

(Execute it while the units are stopped.)

The indoor unit numbers in a group are indicated one after anoth er. The fan and lou vers of the indicated units ar e activated.

1 Push and hold the and buttons at the same time for more than 4 seconds.

• appears on UNIT No. on the LCD display.

• The fans and louvers of all the indoor units in the group are activated.

2 Push the button (left side of the button). Each time you push the button, the indoor unit

numbers are indicated one after another.

• The first-indicated unit number is the address of the header unit.

• Only the fan and louvers of the indicated indoor unit are activated.

3 Push the button to finish the procedure.

All the indoor units in the group stop.

Page 59

▼ To check all the indoor unit addresses using an arbitrary wired remote controller.

(When communication wirings of 2 or more refrigerant lines are interconnected for central control)

(Execute it while the units are stopped.)

You can check indoor unit addresses and positions of the indoor units in a single refrigerant line. When an outdoor unit is selected, the indoor unit numbers of the refrigerant line of the selected unit ar e ind ica te d

one after another and the fan and louvers of the indicated indoor units are activated.

1 Push and hold the TIME and buttons at the same time for more than 4 seconds.

At first, the line 1 and CODE No. (Address Change) are indicated on the LCD display. (Select an outdoor unit.)

2 Push the (left side of the button) and buttons repeatedly to select a system

address.

3 Push the button to confirm the system address selection.

• The address of an indoor unit connected to the selected refrigeran t line is indica ted on the LCD di splay and its fan and louvers are activated.

4 Push the button (left side of the button). Each time you push the button, the indoor unit

numbers of the selected refrigerant line are indicated one after another.

• Only the fan and louvers of the indicated indoor unit are activated.

◆ To select another system address

5 Push the CL button to return to step 2.

• After returning to step 2, select another system address and check the indoor unit addresses of the line.

6 Push the button to finish the procedure.

Page 60

◆ Changing the indoor unit address using a remote controller

To change an indoor unit address using a wired remote controller.

▼ The method to change the address of an individual indoor unit (the indoor unit is paired with a wired

remote controller one-to-one), or an indoor unit in a group. (The method is available when the addresses have already been set automatically.)

Finish

(Execute it while the units are stopped.)

1 Push and hold the , , and buttons at the same time for more than 4 seconds.

(If 2 or more indoor units are controlled in a group, the first indicated UNIT No. is that of the head unit.)

2 Push the button (left side of the button) repeatedly to select an indoor unit number to

change if 2 or more units are controlled in a group. (The fan and louvers of the selected indoor unit are activated.)

(The fan of the selected indoor unit is turned on.)

3 Push the TEMP. / buttons repeatedly to select for CODE No.. 4 Push the TIME / buttons repeatedly to change the value indicated in the SET DATA section

to that you want.

5 Push the button. 6 Push the button (left side of the button) repeatedly to select another indoor UNIT No. to

change.

Repeat steps 4 to 6 to change the indoor unit addresses so as to make each of them unique.

7 Push the button (left side of the button) to check the changed addresses. 8 If the addresses have been changed correctly, push the button to finish the procedure.

Page 61

▼ To change all the indoor unit addresses using an arbitrary wired remote controller.

(The method is available when the addresses have already been set automatically.) (When communication wirings of 2 or more refrigerant lines are interconnected for central control)

NOTE

You can change the addresses of indoor units in each refrigerant line using an arbitrary wired remote controller. * Enter the address check / change mode and change the addresses.

Cancels the line selection

If no number appears on UNIT No., no outdoor unit exists on the line. Push button and select another line following step 2.

(Execute it while the units are stopped.)

1 Push and hold the TIME / buttons at the same time for more than 4 seconds.

At first, the line 1 and CODE No. (Address Change) are indicated on the LCD display.

2 Push (left side of the button) and buttons repeatedly to select a system address. 3 Push the button.

• The address of one of the indoor units connected to the selected refrigerant line is indicated on the LCD display and the fan and louvers of the unit are activated. At first, the current indoor unit address is displayed in SET DATA. (No system address is indicated.)

Finish

Press to finish setting.

Page 62

4 Push the TIME / buttons repeatedly to change the value of the indoor unit address in SET

DATA. Change the value in SET DATA to that of a new address.

5 Push the button to confirm the new address on SET DATA. 6 Push the button (left side of the button) repeatedly to select another address to change.

Each time you push the button, the indoor unit numbers in a refrigerant line are indicated one after another. Only the fan and louvers of the selected indoor unit are activated.

Repeat steps 4 to 6 to change the indoor unit addresses so as to make each of them unique.

7 Push the button.

(All the segments on the LCD display light up.)

8 Push the button to finish the procedure.

Page 63

◆ Error clearing function

How to clear the error using the wired remote controller

▼ Clearing an error of the outdoor unit

Clear the currently detected outdoor unit for each refrigerant line to which the indoor unit controlled by the remote controller is connected. (The indoor unit error is not cleared.) Use the service monitoring function of the remote controller.

1 Push and hold the , and for 4 seconds or longer to enter the service monitoring mode. 2 Push the button to set CODE No. to “ ”. 3 The display in A of the following figure counts down as follows at 5-second intervals: “ ”

“”

The error is cleared when “ ” appears. However, the display counts down from “” again.

Æ “” Æ “” Æ “” Æ “”.

4 Push the to return the display to normal.

▼ Clearing an error of the indoor unit

Push the button on the remote controller. (Only the error of the indoor unit controlled by the remote controller will be cleared.)

Page 64

◆ Monitoring function of wired remote controller

The following monitoring function is available if the remote controller of RBC-ATM32E is used.

▼ Content

Enter the service monitoring mode using the remote controller to check the sensor temperature or operation status of the remote controller, indoor unit, and outdoor unit.

1 Push and hold the , and for 4 seconds or longer to enter the service monitoring mode. The

service monitor lights up. The temperature of CODE No. appears at first.

2 Push the button to change to CODE No. of the item to monitor. Refer to the following table

for CODE No.

3 Push the left part of the button to change to the item to monitor. Monitor the sensor

temperature or operation status of the indoor unit and outdoor unit in the refrigerant line

4 Push the to return the display to normal.

Page 65

◆ Target outdoor unit (SMMS, SHRM, Mini-SMMS – Series 1 – 2)

CODE No. Data Format Unit Remote controller display example

Indoor unit data

System data

00 Room temperature (in control) *1 ×1 °C 01 Room temperature (Remote controller) ×1 °C 02 Air Temperature (TA) ×1 °C 03 Coil Temperature (TCJ) ×1 °C 04 Coil Temperature (TC2) ×1 °C 05 Coil Temperature (TC1) ×1 °C

08 PMV ×1 pls [0050]=500 pls 0A Number of connected indoor units ×1 – [0048]=48 0B Total horse power of connected indoor units ×1 HP [0415]=41.5 HP 0C Number of connected outdoor units ×1 – [0004]=4 0D Total horse power of outdoor units ×1 HP [0420]=42 HP

[0024]=24 °C

CODE No.

U1 U2 U3 U4

Individual data 1 of outdoor unit *3

*1 In the case of group connection, only the header indoor unit data can be displayed. *2 01 ... Only compressor 1 is on

10 ... Only compressor 2 is on 11 ... Both compressor 1 and 2 are on

*3 The upper digit of CODE No. indicates the outdoor unit No.

U1 outdoor unit (Header unit) U2 outdoor unit (follower unit 1) U3 outdoor unit (follower unit 2) U4 outdoor unit (follower unit 3)

10 20 30 40

11 21 31 41

12 22 32 42

13 23 33 43 14 24 34 44 Suction Temperature (TS) ×1 °C

15 25 35 45 Coil Temperature 1 (TE) ×1 °C 16 26 36 46 Liquid Temperature (TL) ×1 °C 17 27 37 47 Outdoor Temperature (TO) ×1 °C 18 28 38 48 Low-pressure saturation temperature (TU) ×1 °C 19 29 39 49 Current of compressor 1 (I1) ×1 A 1A 2A 3A 4A Current of compressor 2 (I2) ×1 A 1B 2B 3B 4B PMV1 + 2 ×1 pls [0050]=500 pls 1C 2C 3C 4C PMV3 ×1 pls [0050]=500 pls 1D 2D 3D 4D Compressor 1, 2 ON/OFF *2 – 1E 2E 3E 4E Outdoor fan mode ×1 – [0031]=Mode 31 1F 2F 3F 4F Horse power of outdoor unit ×1 HP [0016]=16HP

Discharge temperature of compressor 1 (Td1)

Discharge temperature of compressor 2 (Td2)

Detection pressure of high-pressure sensor (Pd)

Detection pressure of low-pressure sensor (Ps)

Data Format Unit Remote controller display example

×1 °C

×1 MPa

[0024]=24 °C

[0123]=1.23 MPa

[0024]=24 °C

[0135]=13.5 A

Page 66

◆ Target outdoor unit (SMMS-i – Series 4)

CODE No. Data Format Unit Remote controller display example

Indoor unit data *2

System data

00 Room temperature (in control) ×1 °C

01 Room temperature (Remote controller) ×1 °C

02 Air Temperature (TA) ×1 °C

03 Coil Temperature (TCJ) ×1 °C

04 Coil Temperature (TC2) ×1 °C

05 Coil Temperature (TC1) ×1 °C

06 Discharge temperature (TF) *1 ×1 °C

08 PMV ×1/10 pls [0150]=1500 pls

F9 FA Outdoor Air Temperature (TOA) *1 ×1 °C

0A Number of connected indoor units ×1 – [0048]=48

0B Total horse power of connected indoor units ×10 HP [0415]=41.5HP 0C Number of connected outdoor units ×1 – [0004]=4 0D Total horse power of outdoor units ×10 HP [0420]=42HP

Air Suction Temperature of direct expansion coil (TSA) *1

×1 °C

[0024]=24 °C

CODE No.

U1 U2 U3 U4

Individual data 1 of outdoor unit *3

*1 The TF/TSA/TOA sensors are equipped only with some types of indoor units. The data does not appear for other types. *2 In the case of group connection, only the header indoor unit data can be displayed. *3 The upper digit of CODE No. indicates the outdoor unit No. *4 [(The upper digit of CODE No.) – 4] indicates the outdoor unit No.

1✽, 5✽ ... U1 outdoor unit (Header unit) 2✽, 6✽ ... U2 outdoor unit (follower unit 1) 3✽, 7✽ ... U3 outdoor unit (follower unit 2) 4✽, 8✽ ... U4 outdoor unit (follower unit 3)

*5 Only CODE No. 5✽ of U1 outdoor unit (Header unit) is displayed.

10 20 30 40

11 21 31 41

12 22 32 42

13 23 33 43

14 24 34 – 15 25 35 45 Suction Temperature (TS) ×1 °C

16 26 36 46 Coil Temperature 1 (TE1) ×1 °C 17 27 37 – Coil Temperature 2 (TE2) ×1 °C 18 28 38 48 Liquid Temperature (TL) ×1 °C

19 29 39 49 Outdoor Temperature (TO) ×1 °C 1A 2A 3A 4A PMV1 + 2 ×1 pls 1B 2B 3B – PMV4 ×1 pls 1C 2C 3C 4C Current of compressor 1 (I1) ×10 A 1D 2D 3D 4D Current of compressor 2 (I2) ×10 A 1E 2E 3E – Current of compressor 3 (I3) ×10 A

1F 2F 3F 4F Outdoor fan current (IFan) ×10 A

Detection pressure of high-pressure sensor (Pd)

Detection pressure of low-pressure sensor (Ps)

Discharge temperature of compressor 1 (Td1)

Discharge temperature of compressor 2 (Td2)

Discharge temperature of compressor 3 (Td3)

Data Format Unit Remote controller display example

×100 MPa

[0123]=1.23 MPa

×100 MPa

×1 °C

[0024]=24 °C

[0050]=500 pls

[0135]=13.5 A

Page 67

CODE No.

U1 U2 U3 U4

Individual data 2 of outdoor unit *4

*1 The TF / TSA / TOA sensors are equipped only with some types of indoor units. The data does not appear for other types. *2 In the case of group connection, only the header indoor unit data can be displayed. *3 The upper digit of CODE No. indicates the outdoor unit No. *4 [(The upper digit of CODE No.) – 4] indicates the outdoor unit No.

1✽, 5✽ ... U1 outdoor unit (Center unit) 2✽, 6✽ ... U2 outdoor unit (terminal unit 1) 3✽, 7✽ ... U3 outdoor unit (terminal unit 2) 4✽, 8✽ ... U4 outdoor unit (terminal unit 3)

*5 Only CODE No. 5✽ of U1 outdoor unit (Center unit) is displayed.

50 60 70 80 Rotation of compressor 1 ×10 rps

52 62 72 – Rotation of compressor 3 ×10 rps

53 63 73 83 Outdoor fan mode ×1 Mode [0058]=Mode 58

54 64 74 84

55 65 75 85

56 66 76 –

57 67 77 87 Heat sink temperature of outdoor fan IPDU ×1 °C

58 – – –

59 – – – Pressure release *5 5A – – –

5B – – –

5F 6F 7F 8F Horse power of outdoor unit ×1 HP [0016]=16HP

Heat sink temperature of compressor IPDU1

Heat sink temperature of compressor IPDU2

Heat sink temperature of compressor IPDU3

In heat/cool collecting control *5 0: Normal

Discharge temperature release *5 [0001] = In discharge temperature

Terminal unit release (U2 / U3 / U4 outdoor unit) *5

Data Format Unit Remote controller display example

[0642]=64.2 rps51 61 71 81 Rotation of compressor 2 ×10 rps

×1 °C

1: In collecting control

0: Normal 1: In release control

[0024]=24 °C

[0010] = In heat collecting control [0001] = In cool collecting control

[0010] = In pressure release control

release control [0100] = In U2 outdoor unit release

control [0010] = In U3 outdoor unit release control [0001] = In U4 outdoor unit release control

◆ LED display of circuit board

1.D501 (Red)

• Lights up when the power is turned on (Microcomputer works)

• Blinks at 1-second intervals (0.5-second): No EEPROM, or writing error

• Blinks at 10-second intervals (5-second): No DISP mode

• Blinks at 2-second intervals (1-second): Function change being set (EEPROM)

2.D403 (Red)

• Lights up (on hardware) when the power is supplied to the remote controller

3.D503 (Yellow): Indoor/Outdoor central control

• Lights up for the first half 5 seconds while communicating with a central control device

• Blinks for the second half 5 seconds at 0.2-second intervals (0.1-second) while communicating with the outdoor unit

4.D504 (Green): Remote controller communication

• The group header unit lights up for the first half 5 seconds while communicating with the remote controller

• Blinks for the second half 5 seconds at 0.2-second intervals (0.1-second) during communication between group indoor header and follower

Page 68

6 Troubleshooting

6-1. Overview

(1)Before engaging in troubleshooting

(a) Applicable models

All Super Module Multi (SMMS, SHRM, Mini-SMMS, SMMS-i) models. (Indoor units: MMO-APOOO, Outdoor units: MMY-MAPOOOO∗, MCY-MAPOOOHT∗)

(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 • Could it just be cold air discharge prevention control, which is part of

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 controller

shutdown)?

• Could it just be the air conditioner having gone thermo 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?

heating?

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

• Could it just be defrosting operation?

the air conditioner shutdown process after heating operation?

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

(2)Troubleshooting procedure

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

"E28" error

Fault

Investigate check code displayed on interface P.C. board of header unit

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

Any other fault

Check fault site or faulty part

NOTE

Rather than a genuine fault (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 controller wiring and signal wires as necessary.

Page 69

6-2. Troubleshooting method

The remote controllers (main remote controller and central control remote controller) and the interface P.C. board of an outdoor unit are provided with an LCD display (remote controller) or a 7-segment display (outdoor interface P.C. board) to display operational status. Using this self-diagnosis feature, the fault site / faulty part may be identified in the event of a fault 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 fault in consultation with the list.

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

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

• When investigating a fault on the basis of a display provided on the AI-NET central control remote controller - See the “AI-NET central control display” section of the list.

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

List of check codes (indoor unit)

(Error detected by indoor unit)

Check code

TCC-LINK

central control

or main remote

controller

display

Outdoor 7-segment display Indicator light block

Sub-code

E03 – –

E04 – – E08 E08 E10 – –

E18 – –

F01 – – ALT

F02 – – ALT

F03 – – ALT

F10 – – ALT

F11 – – ALT F29 – – SIM L03 – – SIM

L07 – – SIM

L08 L08 – SIM L09 – – SIM

L20 – – SIM L30 L30

P01 – – ALT P10 P10

P12 – – ALT P31 – – ALT

Duplicated indoor address Duplicated indoor address Indoor unit detects address identical to its own.

Detected indoor unit No.

Display of receiving unit

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 fault site Description of error

Flash

Indoor-remote controller periodic communication error

Indoor-outdoor periodic communication error

Indoor inter-MCU communication error

Error in periodic communication between indoor header and follower unit

Indoor heat exchanger temperature sensor (TCJ) error

Indoor heat exchanger temperature sensor (TC2) error

Indoor heat exchanger temperature sensor (TC1) error

Ambient temperature sensor (TA) error

Discharge temperature sensor (TF) error

P.C. board or other indoor error Indoor EEPROM is abnormal (some other error may be detected). Duplicated indoor group header

unit Connection of group control cable

to stand-alone indoor unit Indoor group address not set Indoor capacity not set Capacity setting has not been performed for indoor unit.

Duplicated central control address There is duplication in central control address setting. Indoor external error input

SIM

(interlock) Indoor AC fan error

ALT

Indoor overflow error Float switch has been activated. Indoor DC fan error Indoor DC fan error (e.g. overcurrent or lock-up) is detected.

Other indoor unit error

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

Signals are not being received from outdoor unit.

MCU communication between main controlle r and motor microcontroller is faulty.

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

Heat exchanger temperature sensor (TCJ) has been open / shortcircuited.

Heat exchanger temperature sensor (TC2) has been open / shortcircuited.

Heat exchanger temperature sensor (TC1) has been open / shortcircuited.

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

circuited.

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).

Unit shutdown has been caused by external error input (CN80). Indoor AC fan error is detected (activation of fan motor thermal

relay).

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

Page 70

(Error detected by main remote controller)

Check code

Outdoor 7-segment display Indicator light block

Main

remote

controller

E01 – –

E02 – –

E09 – –

Sub-code

Display of receiving unit

Flash

Typical fault site Description of error

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

Faulty remote controller communication (transmission)

Duplicated master remote controller

(Error detected by central control device)

Check code

TCC-LINK

central control

Outdoor 7-segment display Indicator light block

Sub-code

C05 – –

C06 – –

– – – Multiple network adapters

C12 – – –

P30 – –

Display of receiving unit

Flash

No indication (when main remote control l er also in use)

As per alarm unit (see above)

Typical fault site Description of error

Faulty central control communication (transmission)

Faulty central control communication (reception)

Blanket alarm for generalpurpose device control interface

Group control follower unit error

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

Signals cannot be transmitted to indoor unit. Both remote controllers have been set as master remote

controller in two remote controller control (alarm and shutdown for header unit and continued operation for follower unit)

Central control device is unable to transmit signal due to duplication of central control device (AI-NET).

Central control device is unable to receive signal. Multiple network adapters are connected to remote

controller communication line (AI-NET). Device connected to general-purpose device control

interface for TCC-LINK / AI-NET is faulty. Group follower unit is faulty (unit No. and above detail [∗∗∗]

displayed on main remote controller)

Note: The same error, e.g. a communication error, may result in the display of different check codes depending on the device that detects it.

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

Page 71

List of check codes (outdoor unit)

(Errors detected by SMMS outdoor interface - typical examples)

Check code

Outdoor 7-segment display

Sub-code

Number of indoor units from which

E06

signal is received normally

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

E28 Detected outdoor unit No. E28 Outdoor follower unit error

TCC-LINK

central control

or main remote

controller

Display of receiving unit

Indicator light block

display

E06 Dropping out of indoor unit

(E08)

E12

E16

E19

E20

E26

Flash

Typical fault site Description of error

Indoor-outdoor communication circuit error

Duplicated indoor address

Automatic address starting error

Indoor unit not found during automatic address setting

Too many indoor units connected / overloading

Error in number of outdoor header units

Connection to other refrigerant line found during automatic address setting

Outdoor-outdoor communication transmission error

Duplicated follower outdoor address

Dropping out of outdoor unit

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

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 is 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).

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

E31 E31 IPDU communication error

F04 – F04 ALT

F05 –

01: TE1

F06

02: TE2

F07 – F07 ALT

F08 – F08 ALT

F11 – F11

F05

F06 ALT

Outdoor discharge temperature sensor (TD1) error

Outdoor discharge

ALT

temperature sensor (TD2) error

Outdoor heat exchanger temperature sensor (TE1, TE2) error

Outdoor liquid temperature sensor (TL) error

Outdoor outside air temperature sensor (TO) error

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

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

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

Outdoor heat exchanger temperature sensors (TE1, TE2) have been open / short-circuited.

Outdoor liquid temperature sensor (TL) has been open / short-circuited.

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

Page 72

Check code

Outdoor 7-segment display

Sub-code

TCC-LINK

central control

or main remote

controller

Display of receiving unit

Indicator light block

display

Typical fault site Description of error

Flash

Outdoor suction

F12 – F12 ALT

01: Compressor 1

F13

02: Compressor 2 03: Compressor 3

F13 ALT

temperature sensor (TS1) error

Outdoor IGBT built-in temperature sensor (TH) error

Outdoor temperature

F15 – F15 ALT

F16 – F16 ALT

F22 – F22 ALT

sensor (TE1, TL) wiring error

Outdoor pressure sensor (Pd, Ps) wiring error

Outdoor discharge temperature sensor (TD3) error

F23 – F23 ALT

F24 – F24 ALT

Low pressure sensor (Ps) error

High pressure sensor (Pd) error

F31 – F31 SIM Outdoor EEPROM error

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

H04 – H04

H01 Compressor breakdown

H02 Compressor error (Lock) Compressor lock was detected.

H03

Current detection circuit error

Compressor 1 case thermo activation

Outdoor discharge

H05 – H05

H06 – H06

temperature sensor (TD1) wiring error

Activation of low-pressure protection

H07 – H07 Low oil level protection

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

H08

04: TK4 sensor error 05: TK5 sensor error

H08

H14 – H14

H15 – H15

Error in temperature sensor for oil level detection (TK1-5)

Compressor 2 case thermo activation

Outdoor discharge temperature sensor (TD2) wiring error

01: TK1 oil circuit error 02: TK2 oil circuit error

H16

03: TK3 oil circuit error 04: TK4 oil circuit error

H16

Oil level detection circuit error

05: TK5 oil circuit error

H25 – H25

Outdoor discharge temperature sensor (TD3) wiring error

L04 – L04 SIM

L05 SIM

Number of priority indoor units

L06

(check code L05 or L06 depending on individual unit)

L06 SIM

Duplicated outdoor refrigerant line address

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

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

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

Open-circuit or short-circuit of the outdoor IGBT built-in temperature sensor (TH) was detected.

Wiring error in outdoor temperature sensors (TE1, TL) has been detected.

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

Outdoor discharge temperature sensor (TD3) has been open / short-circuited.

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.

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

Overcurrent of the inverter current (Idc) detection circuit was detected.

Current error was detected while the compressor was stopped.

Compressor 1 case thermo was activated for protection.

Wiring / installation error 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 (TK1-5) detects abnormally low oil level.

Temperature sensor for oil level detection (TK1-5) has been open / short-circuited.

Compressor 2 case thermo was activated for protection.

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

No temperature change is detected by temperature sensor for oil level detection (TK1-5) despite compressor having been started.

Wiring / installation error 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 has been set up as priority indoor unit.

Page 73

Check code

Outdoor 7-segment display

Sub-code

L08 – (L08) SIM

L10 – L10 SIM Outdoor capacity not set

L17 – L17 SIM

L18 – L18 SIM

L28 – L28 SIM

SMMS (Series 1)

01: A3-IPDU1 error 02: A3-IPDU2 error 03: A3-IPDU1/A3-IPDU2 error 04: Fan IPDU error 05: A3-IPDU1

+ Fan IPDU error

06: A3-IPDU2

+ Fan IPDU error

07: All IPDU error

SMMS-i (Series 4)

L29

TCC-LINK

central control

or main remote

controller

Display of receiving unit

Indicator light block

display

L29 SIM Error in number of IPDUs

Flash

Typical fault site Description of error

Indoor group address not set

Outdoor model incompatibility error

FS (Flow Selector) unit error

Too many outdoor units connected

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

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

Old model outdoor unit (prior to 3 series) has been connected.

Cooling / heating cycle error resulting from piping error is detected.

More than four outdoor units have been connected.

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

L30 Detected indoor unit No. (L30) SIM

P03 – P03 ALT

01: Compressor 1

P04

02: Compressor 2 03: Compressor 3

00: Open phase detected 01: Compressor 1

P05

02: Compressor 2 03: Compressor 3

01: Compressor 1

P07

02: Compressor 2 03: Compressor 3

P10 Indoor unit No. detected (P10) ALT Indoor unit overflow

P13 – P13 ALT

01: TS condition

P15

02: TD condition

P17 – P17 ALT

P18 – P18 ALT

P19 Outdoor unit No. detected P19 ALT

P20 – P20 ALT

P04 ALT

P05 ALT

P07 ALT

P15 ALT Gas leak detection

Indoor external error input (interlock)

Outdoor discharge (TD1) temperature error

High-pressure SW activation

Open phase / power failure Inverter DC voltage (Vdc)

error MG-CTT error

Heat sink overheating error

Outdoor liquid backflow detection error

Outdoor discharge (TD2) temperature error

Outdoor discharge (TD3) temperature error

4-way valve reversing error

Activation of high-pressure protection

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

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

High-pressure SW was activated.

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

Temperature sensor built into IGBT (TH) detects overheating.

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

Page 74

(Errors detected by IPDU featuring in SMMS standard outdoor unit - typical examples)

Check code

Outdoor 7-segment display

Sub-code

01: Compressor 1

F13

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 02: Compressor 2

H03

03: Compressor 3 01: Compressor 1

P04

02: Compressor 2 03: Compressor 3

01: Compressor 1

P07

02: Compressor 2 03: Compressor 3

P20 – P20 ALT

SMMS (Series 1)

04: Rotation difference error 06: Maximum rotation exceeded 08: Out of step 0A: Idc activation 0C: Fan lock 0d: Lock 0E: Sync error 0F: Control error

SMMS-i (Series 4)

P22

0∗: IGBT circuit 1∗: Position detection circuit error 3∗: Motor lockup error 4∗: Motor current detection C∗: TH sensor error D∗: TH sensor error E∗: Inverter DC voltage error (outdoor fan)

Note: Although letters 0 to F appear

at locations indicated by “∗”, please ignore them.

01: Compressor 1

P26

02: Compressor 2 03: Compressor 3

01: Compressor 1

P29

02: Compressor 2 03: Compressor 3

TCC-LINK

central control

or main remote

controller

Display of receiving unit

Indicator light block

display

F13 ALT

H01 Compressor breakdown

H02

H03

P04 ALT

P07 ALT

P22 ALT Outdoor fan IPDU error Outdoor fan IPDU detects error.

P26 ALT

P29 ALT

Flash

Typical fault site Description of error

Error in temperature sensor built into indoor IGBT (TH)

Compressor error (lockup) Compressor lockup is detected

Current detection circuit error

Activation of high-pressure SW

Heat sink overheating error

High-pressure protection activation

Activation of G-Tr (IGBT) short-circuit protection

Compressor position detection circuit error

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

Inverter current (Idc) detection circuit detects overcurrent.

Abnormal current is detected while inverter compressor is turned off.

High-pressure SW is activated.

Temperature sensor built into IGBT (TH) detects overheating.

High-pressure (Pd) sensor detected a value over the criteria.

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

Compressor motor position detection error is detected.

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

(e.g. a Super heat recovery multi system). For details, see the service manual for the outdoor unit.

Page 75

6-3. Troubleshooting based on information displayed on

remote controller

Using main remote controller (RBC-AMT32E)

(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 controller. Check codes are only displayed while the air conditioner is in operation.

If the display has already disappeared, access error history by following the procedure described below.

(2)Error history The error history access procedure is described below (up to four errors stored in memory). Error history can be accessed regardless of whether the air conditioner is in operation or shut down.

<Procedure> To be performed when system at rest

1 Invoke the SERVICE CHECK mode by pressing 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 error history. This is accompanied by the indoor unit No. to wh ich the error history is related and a check code.

Check code

Indoor unit No. in which fault has occurred

2 To check other error history items, press the

button to select another check code.

Check code “01” (latest) ➝ Check code “04” (oldest) Note: Error history contains four items.

3 When the button is pushed, normal display is

restored.

REQUIREMENT

Do not push the button as it would erase the whole error history of the indoor unit.

How to read displayed information

<7-segment display symbols>

Normal display is restored.

Steps to follow

Page 76

Using TCC-LINK central control remote controller (TCB-SC642TLE2)

(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 controller.

Check codes are only displayed while the air conditioner is in operation.

If the display has already disappeared, access error history by following the procedure described below.

Alternate blinking

Display of check codeDisplay of Unit No.

1 Push the + buttons simultaneously and hold for at least 4 seconds. 2 The letters “ SERVICE CHECK” light up, and the check code “01” is displayed. 3 When a group No. is selected (blinking), if there is an error history, the UNIT No. and the latest

error history information are displayed alternately.

*During this procedure, the temperature setting featur e is unavailable.

Display of check codeDisplay of Unit No.

Alternate blinking

4 To check other error history items, push the button to select another check code (01-04.). 5 To check check code relating to another group, push (ZONE) and (GROUP) buttons to select

a group No. Do not push the button as it would erase the whole error history of the selected group.

6 To finish off the service check, push the button.

Page 77

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 “6-2. Troubleshooting method”.

: Goes off : Lighting : Blinking (0.5 seconds)

Light block Check code Cause of fault

Operation Timer Ready

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

All lights out

Operation Timer Ready

Blinking

Operation Timer Ready

Blinking

Operation Timer Ready

E01 Faulty reception E02 Faulty transmission E03 Loss of communication E08 Duplicated indoor unit No. (address) E09 Duplicated master remote controller E10 Indoor unit inter-MCU communication error E12 Automatic address starting error E18 Error or poor contact in wiring between indoor units, indoor power turned off

E04 E06 Faulty reception in indoor-outdoor communication (dropping out of indoor unit)

E07 Faulty transmission in indoor-outdoor communication E15 Indoor unit not found during automatic address setting E16 Too many indoor units connected / overloading E19 Error in number of outdoor header units E20 Detection of refrigerant piping communication error during automatic address setting E23 Faulty transmission in outdoor-outdoor communication E25 Duplicated follower outdoor address E26 Faulty reception in outdoor-outdoor communication, dropping out of outdoor unit E28 Outdoor follower unit error E31 IPDU communication error P01 Indoor AC fan error P10 Indoor overflow error P12 Indoor DC fan error

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

Receiving unit

Error or poor contact in wiring between receiving and indoor units

Setting error

Alternate blinking

Operation Timer Ready

Alternate blinking

P13 Outdoor liquid backflow detection error P03 Outdoor discharge (TD1) temperature error

P04 Activation of outdoor high-pressure SW

P05

P07 Outdoor heat sink overheating error - Poor cooling of electrical component (IGBT) of outdoor unit P15 Gas leak detection - insufficient refrigerant charging P17 Outdoor discharge (TD2) temperature error P18 Outdoor discharge (TD3) temperature error P19 Outdoor 4-way valve reversing error P20 Activation of high-pressure protection P22 Outdoor fan IPDU error P26 Outdoor G-Tr short-circuit error P29 Compressor position detection circuit error P31 Shutdown of other indoor unit in group due to fault (group follower unit error)

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

MG-CTT: Magnet contactor

Page 78

Light block Check code Cause of fault

Operation Timer Ready

Alternate blinking

Operation Timer Ready

Alternate blinking

Operation Timer Ready

F01 Heat exchanger temperature sensor (TCJ) error F02 Heat exchanger temperature sensor (TC2) error F03 Heat exchanger temperature sensor (TC1) error F10 Ambient temperature sensor (TA) error F11 Discharge temperature sensor (TF) error F04 Discharge temperature sensor (TD1) error F05 Discharge temperature sensor (TD2) error F06 Heat exchanger temperature sensor (TE1, TE2) error F07 Liquid temperature sensor (TL) error F08 Outside air temperature sensor (TO) error F12 Suction temperature sensor (TS1) error F13 Heat sink sensor (TH) error

F15

F16

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

Wiring error in outdoor high pressure sensor (Pd) and low pressure sensor (Ps)

Outdoor pressure sensor wiring error F22 Outdoor discharge temperature sensor (TD3) error F23 Low pressure sensor (Ps) error F24 High pressure sensor (Pd) error

Indoor unit temperature sensor errors

Outdoor unit temperature sensor errors

Outdoor unit pressure sensor errors

Synchronized blinking

Operation Timer Ready

Blinking

Operation Timer Ready

Synchronized blinking

Operation Timer Ready

Synchronized blinking

F29 Fault in indoor EEPROM

H01 Compressor breakdown H02 Compressor lockup

Outdoor unit compressorrelated errors

H03 Current detection circuit error H05 Wiring / installation error or detachment of outdoor discharge temperature sensor (TD1) H06 Abnormal drop in low-pressure sensor (Ps) rea d ing H07 Abnormal drop in oil level

Protective shutdown of outdoor unit

H08 Error in temperature sensor for oil level detection circuit (TK1, TK2, TK3, TK4 or TK5) H15 Wiring / installation error or detachment of outdoor discharge temperature sensor (TD2) H16 Oil level detection circuit error - Error in outdoor unit TK1, TK2, TK3, TK4 or TK5 circuit H25 Wiring / installation error or detachment of outdoor discharge temperature sensor (TD3) 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 L17 Outdoor model incompatibility error L18 Flow selector units error L20 Duplicated central control address L28 Too many outdoor units connected L29 Error in number of IPDUs L30 Indoor external interlock error

Page 79

Light block Check code Cause of fault

Operation Timer Ready

F31 Outdoor EEPROM error

Synchronized blinking

Other (indications not involving check code)

Light block Check code Cause of fault

Operation Timer Ready

– Test run in progress

Synchronized blinking

Operation Timer Ready

–

Alternate blinking

Setting incompatibility

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

model)

Page 80

6-4. Check codes displayed on remote controller and

SMMS 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.

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

E01 – – –

E02 – – –

E03 – – 97

E04 – – 04

E06 E06

–E07 – –

Sub-code

No. of indoor units from which signal is received normally

AI-NET central

control

remote

controller

Location

detection

Remote controller

Indoor unit

I/F Dropping out of

I/F Indoor-outdoor

Description System status

Indoor-remote controller communication error (detected at remote controller end)

Remote controller transmission error

Indoor-remote controller communication error (detected at indoor end)

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

indoor unit

communication circuit error (detected at outdoor end)

Stop of corresponding unit

All stop Indoor unit initially

All stop Signal cannot be transmitted

Error detection

condition(s)

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

Signal cannot be transmitted from remote controller to indoor unit.

There is no communication from remote controller (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.

from outdoor to indoor units for 30 seconds continuously.

Check items (locations)

• Check remote controller 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 controller address settings (when two remote controllers are in use).

• Check remote controller P.C. board.

• Check internal transmission circuit of remote controller.

--- Replace remote controller as necessary.

• Check remote controller 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 termination resistance setting (SW30, Bit 2).

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

• Check connection of indoor-outdoor 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 termination resistance setting (SW30, Bit 2).

• Check connection of indoor-outdoor communication circuit.

Page 81

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

Duplicated indoor address

AI-NET central

E08 E08

E09 – – 99

E10 – – CF

01: Indoor-outdoor communication 02:

E12 E12

Outdooroutdoor communication

E15 E15 – 42

00: Overloading 01-: No. of units connected

E16 E16

control

remote

controller

Location

detection

Indoor unit

Description System status

Duplicated indoor address

I/F

Remote controller

Indoor unit

I/F Automatic

I/F Indoor unit not

Duplicated master remote controller

Indoor interMCU communication error

address starting error

found during automatic address setting

I/F Too many

indoor units connected

Error detection

condition(s)

All stop More than one indoor unit is

Stop of corresponding unit

All stop • Indoor automatic address

All stop Indoor unit cannot be

assigned same address.

In two remote controller configuration (including wireless), both controllers 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.

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.

detected after indoor automatic address setting is started.

All stop • Combined capacity of

indoor units exceeds 135 % of combined capacity of outdoor units.

Note:

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

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

• More than 48 indoor units are connected.

Check items (locations)

• Check indoor addresses.

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

• Check remote controller settings.

• Check remote controller 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 indoor-outdoor communication line.

• Check for error in indoor power supply system.

• Check for noise from other devices.

• Check for power failure.

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

• 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).

Page 82

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

AI-NET central

controller

E18 – – 97·99

00: No header unit 02: Two or more

E19 E19

E20 E20

header units 96

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

E23 E23 – 15

E25 E25 – 15

Address of outdoor unit from which signal is not received normally

E26 E26

Detected outdoor unit No.

E28 E28

control

remote

Location

detection

Indoor unit

Description System status

Error in communication between indoor header and follower units

I/F Error in number

of outdoor header units

I/F Connection to

I/F Outdoor-

other line found during automatic address setting

outdoor communication transmission error

I/F Duplicated

follower outdoor address

I/F Dropping out of

I/F Outdoor

outdoor unit

follower unit error

Error detection

condition(s)

Stop of corresponding unit

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

All stop • There is more than one

outdoor header unit in one line.

• There is no outdoor header unit in one line.

All stop Equipment from other line is

All stop Signal cannot be transmitted

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

to other outdoor units for at least 30 seconds continuously.

All stop There is duplication in

outdoor addresses set manually.

All stop Outdoor unit initially

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

All stop Outdoor header unit receives

error code from outdoor follower unit.

Check items (locations)

• Check remote controller 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 indoor-outdoor 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 7segmentdisplay of outdoor header unit, the fan of the outdoor unit that has been shut down due to an error 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.

Page 83

Main

remote

controller

E31 E31

Check code

Outdoor 7-segment display

Check

code

Sub-code

SMMS (Series 1) 01: A3-IPDU1 error 02: A3-IPDU2 error 03: A3-IPDU1/A3IPDU2 error 04: Fan IPDU error 05: A3-IPDU1 + Fan IPDU error 06: A3-IPDU2 + Fan IPDU error 07: All IPDU error or Communication error between IPDU and I/F circuit board or Outdoor I/F circuit board error

SMMS-i (Series 4)

AI-NET central

control remote

controller

Location

detection

I/F IPDU

Description System status

communication error

Error detection

condition(s)

All stop Communication is disrupted

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

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.

Symbol O signifies site of IPDU error.

F01 – – 0F

F02 – – 0d

F03 – – 93

F04 F04 – 19

F05 F05 – A1

01: TE1 sensor error

F06 F06

02: TE2 sensor error 18

Indoor unit

Indoor TCJ sensor error

Indoor TC2 sensor error

Indoor TC1 sensor error

I/F TD1 sensor

error

I/F TD2 sensor

I/F TE1/TE2

error

sensor error

Stop of corresponding

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

unit

Stop of corresponding unit

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

All stop Sensor resistance is infinity

or zero (open / short circuit).

All stop Sensor resistance is infinity

or zero (open / short circuit).

Check connection of TCJ

• sensor connector and wiring.

•

Check resistance characteristics of TCJ sensor.

•

Check for defect in indoor P.C. board.

•

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).

Page 84

Check code

Main

remote

controller

Outdoor 7-segment display

Check

code

Sub-code

AI-NET central

F07 F07 – 18

F08 F08 – 1b

F10 – – 0C

F11 – –

F12 F12 – A2

01: Compressor 1 side

F13 F13

02: Compressor 2 side 03: Compressor 3 side

F15 F15 – 18

F16 F16 – 43

F22 F22 –

F23 F23 – 43

control remote

controller

Location

detection

I/F TL sensor

Description

error

I/F TO sensor

error

Indoor unit

Indoor TA sensor error

Indoor TF sensor error

I/F TS1 sensor

error

IPDU TH sensor

I/F Outdoor

error

temperature sensor wiring error (TE1, TL)

pressure sensor wiring error (Pd, Ps)

I/F TD3 sensor

error

I/F Ps sensor

error

System

status

All stop Sensor resistance is infinity

Error detection

condition(s)

or zero (open / short circuit).

All stop Sensor resistance is infinity

or zero (open / short circuit).

Stop of corresponding unit

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

All stop Sensor resistance is infinity

or zero (open / short circuit).

All stop Sensor resistance is infinity

All stop During compressor

All stop Readings of high-pressure

All stop Sensor resistance is infinity

or zero (open / short circuit).

operation in HEAT mode, TE1 continuously provides temperature reading higher than indicated by TL by at least specified margin for 3 minutes or more.

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

or zero. (open / short circuit)

All stop Output voltage of Ps

sensor is zero.

Check items (locations)

• Check connection of TL sensor connector.

• Check resistance characteristics of TL 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 TA sensor connector and wiring.

• Check resistance characteristics of TA sensor.

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

• 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 sensor connector.

• Check resistance characteristics of TS1 sensor.

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

• Defect in IGBT built-in temperature sensor ➝ Replace A3-IPDU P.C. board.

• Check installation of TE1 and TL sensors.

• Check resistance characteristics of TE1 and TL sensors.

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

• 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 error in outdoor P.C. board (I/F).

• Check for deficiency in compressive output of compressor.

• Check connection of TD3 sensor connector.

• Check resistance characteristics of TD3 sensor .

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

• Check for connection error 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.

Page 85

Check code

Outdoor 7-segment display

Main

remote

controller

H01 H01

H02 H02

H03 H03

H05 H05 –

H06 H06 – 20

F24 –

F24 F24 – 43

F29 – – 12

F31 F31 – 1C

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

AI-NET central

control remote

controller

*1 Total shutdown in case of header unit

Continued operation in case of follower unit

Location

detection

I/F Pd sensor

Indoor unit

I/F Outdoor

IPDU Compressor

IPDU Current

I/F TD1 sensor

I/F Activation of

Description

error

Other indoor error

EEPROM error

breakdown

error (lockup) MG-CTT error

detection circuit error

miswiring (incomplete insertion)

low-pressure protection

System

status

All stop Output voltage of Pd

Stop of corresponding unit

All stop *1 Outdoor P.C. board (I/F)

All stop Inverter current detection

All stop Overcurrent is detected

All stop Current flow of at least

All stop Discharge temperature of

All stop Low-pressure Ps sensor

Error detection

condition(s)

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

Indoor P.C. board does not operate normally.

does not operate normally.

circuit detects overcurrent and shuts system down.

several seconds after startup of inverter compressor.

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

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

detects operating pressure lower than 0.02 MPa.

Check items (locations)

• 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. (AC200 V ± 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. (AC200 V ± 10 %).

• Check compressor system wiring, particularly for open phase.

• Check connection of connectors / terminals on A3IPDU P.C. board.

• Check conductivity of case heater. (Check for refrigerant entrapment 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).

• 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, 2).

• 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.

MG-CTT: Magnet contactor

Page 86

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

AI-NET central

H07 H07 – d7

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

H08 H08

control

remote

controller

Location

detection

I/F Low oil level

I/F Error in

Description System status

protection

temperature sensor for oil level detection

Error detection

condition(s)

All stop Operating compressor

detects continuous state of low oil level for about 2 hours.

All stop Sensor resistance is infinity

or zero (open / short circuit).

All stop Sensor resistance is infinity

or zero (open / short circuit).

All stop Sensor resistance is infinity

or zero (open / short circuit).

Check items (locations)

• 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 entrapment inside compressor casing.

• Check SV3A, SV3B, SV3C, SV3D, SV3E, and SV3F 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).

Page 87

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

H14 H14 –

H15 H15 –

AI-NET central

control

remote

controller

Location

detection

I/F Compressor 2

Description

case thermo activation

I/F TD2 sensor

miswiring (incomplete insertion)

System

status

All stop Compressor 2 case

Error detection

condition(s)

thermo was activated.

All stop Air discharge

temperature of (TD2) does not increase despite compressor 2 being in operation.

Check items (locations)

• Check Compressor 2 case thermo circuit. (Connector, Wiring, Circuit board)

• Open and check the service valve. (Gas side, Liquid side)

• Check the outdoor PMV clogging (PMV1, 2).

• Check the SV42 circuit.

• Check the SV4 circuit (SV41 / 42 miswiring).

• Check the opening status of indoor PMV.

• Check the four-way valve error.

• Check the refrigerant shortage. 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).

Page 88

Outdoor 7-segment display

Main

remote

controller

Check

code

H16 H16

Check code

Sub-code

SMMS (1 series) 01: TK1 oil circuit error 02: TK2 oil circuit error 03: TK3 oil circuit error 04: TK4 oil circuit error

SMMS-i (4 series) 01: TK1 oil circuit error 02: TK2 oil circuit error 03: TK3 oil circuit error 04: TK4 oil circuit error 05: TK5 oil circuit error

AI-NET central

control

remote

controller

Location

detection

I/F Oil detection

I/F Oil level

Description

circuit error

detection circuit error

System

status

All stop The temperature

Error detection

condition(s)

change of TK1 cannot be detected even after Compressor 1 starts operating.

All stop The temperature

change of TK2 cannot be detected even after Compressor 2 starts operating.

The temperature change of TK3 cannot be detected even after Compressor 3 starts operating.

The temperature change of TK4 cannot be detected even after Compressor 4 starts operating, or the temperature difference from that of the other TK sensor changes only in the specified range for a given time or longer.

All stop No temperature

change is detected 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 3 having been started.

Check items (locations)

• Check the TK1 sensor installation.

• Check the TK1 sensor resistant characteristics.

• Check the misconnection of TK1, TK2, TK3, or TK4.

• Check the SV3E valve error.

• Check the oil circuit capillary clogging and non-return valve error.

• Check the hibernating refrigerant in compressor.

• Check the TK2 sensor installation.

• Check the TK2 sensor resistant characteristics.

• Check the misconnection of TK1, TK2, TK3, or TK4.

• Check the SV3E valve error.

• Check the oil circuit capillary clogging and non-return valve error.

• Check the hibernating refrigerant in compressor.

• Check the TK3 sensor installation.

• Check the TK3 sensor resistant characteristics.

• Check the misconnection of TK1, TK2, TK3, or TK4.

• Check the SV3E valve error.

• Check the oil circuit capillary clogging and non-return valve error.

• Check the hibernating refrigerant in compressor.

• Check the TK4 sensor installation.

• Check the TK4 sensor resistant characteristics.

• Check the misconnection of TK1, TK2, TK3, or TK4.

• Check the SV3E valve error.

• Check the oil circuit capillary clogging and non-return valve error.

• Check the hibernating refrigerant in compressor.

• Check for disconnection of TK1 sensor.

• Check resistance characteristics of TK1 sensor.

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

• Check for faulty operation in SV3E or SV3F valve.

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

• Check for refrigerant entrapment i nside compressor.

• Check for disconnection of TK2 sensor.

• Check resistance characteristics of TK2 sensor.

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

• Check for faulty operation in SV3E or SV3F valve.

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

• Check for refrigerant entrapment i nside compressor.

• Check for disconnection of TK3 sensor.

• Check resistance characteristics of TK3 sensor.

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

• Check for faulty operation in SV3E or SV3F valve.

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

• Check for refrigerant entrapment i nside compressor.

Page 89

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

H16 H16

Sub-code

SMMS-i (4 series) 01: TK1 oil circuit error 02: TK2 oil circuit error 03: TK3 oil circuit error 04: TK4 oil circuit error 05: TK5 oil circuit error

AI-NET central

H25 H25 –

L02 L02 –

L03 – – 96

L04 L04 – 96

L05 – – 96

No. of priority indoor units

L06 L06

L07 – – 99

L08 L08 – 99

L09 – – 46

control

remote

controller

Location

detection

I/F Oil level

Description

detection circuit error

I/F TD3 sensor

miswiring (incomplete insertion)

Indoor unit

Outdoor unit model mismatch error

Duplicated indoor header unit

I/F Duplicated

outdoor line address

I/F Duplicated

priority indoor unit (as displayed on priority indoor unit)

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

Indoor unit

Connection of group control cable to standalone indoor unit

Indoor unit

Indoor group / addresses not set

Indoor capacity not set

System

status

All stop No temperature

Error detection

condition(s)

change is detected by TK4 despite compressor having been started.

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

All stop Air discharge

Only the target unit stopped

Stop of corresponding unit

temperature (TD3) does not increase despite compressor 3 being in operation.

An error was found on the outdoor unit model.

There is more than one header unit in group.

All stop There is duplication

in line address setting for outdoor units belonging to different refrigerant piping systems.

All stop More than one

indoor unit has been set up as priority indoor unit.

All stop More than one

Stop of corresponding unit

indoor unit have been set up as priority indoor unit.

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

Stop of corresponding unit

Address setting has not been performed for indoor units.

Capacity setting has not been performed for indoor unit.

Check items (locations)

• Check for disconnection of TK4 sensor.

• Check resistance characteristics of TK4 sensor.

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

• Check for faulty operation in SV3E or SV3F valve.

• 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 error involving TK1, TK2, TK3, TK4, and TK5 sensors

• Check for faulty operation in SV3E valve.

• 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 the model name of the outdoor unit.

• Check the miswiring of the communication line between indoor and outdoor.

• Check indoor addresses.

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

• Check line addresses.

• Check display on priority indoor unit.

• 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)

Page 90

Check code

Main

remote

controller

Outdoor 7-segment display

Check

code

Sub-code

AI-NET central

L10 L10 – 88

L17 L17

Target indoor address

L18 L18 –

L20 – – 98

L28 L28 – 46

L29 L29

SMMS-i (Series 4)

control remote

controller

Location

detection

I/F Outdoor

I/F Outdoor unit

I/F Cool / heat

AI-NET Indoor unit

I/F Too many

I/F Error in No. of

Description System status

capacity not set

model mismatch error

switch unit error

Duplicated central control address

outdoor units connected

IPDUs

Error detection

condition(s)

All stop Jumper wire provided on P.C.

Only the target unit stopped

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

The outdoor unit model is duplicate. The Cool/Heat Flex series 1/2 are duplicate.

The heating operation was performed without the coolonly setting configured in a cool-only room where a cool/ heat switch unit is not connected.

All stop There is duplication in central

All stop There are more than four

All stop Insufficient number of IPDUs

control address setting.

outdoor units.

are detected when power is turned on.

Check items (locations)

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

• Check the outdoor unit model.

•

Check the remote controller setting. (DN="0F")

•

Check the cool / heat switching unit. Check the piping connection of the switching unit. (Miswiring of discharge gas / suction gas) Check the SVS / SVD valve miswiring / misinstallation.

• Check central control addresses.

• Check network adaptor P.C. board (applicable to AI-NET).

• Check No. of outdoor units connected (Only up to 4 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.

Symbol O signifies site of IPDU error.

Page 91

Check code

Main

remote

controller

Outdoor 7-segment display

Check

code

Sub-code

Detected indoor address

AI-NET central

L30 L30

– L31 – –

P01 – – 11

P03 P03 – 1E

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

P04 P04

control remote

controller

Location

detection

Indoor unit

Description System status

External interlock of indoor unit

I/F Extended IC

error

Indoor unit

I/F Discharge

IPDU Activation of

Indoor fan motor error

temperature TD1 error

high-pressure SW

Error detection

condition(s)

Stop of corresponding unit

Continued operation

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

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

Stop of corresponding unit

All stop Discharge temperature (TD1)

All stop High-pressure SW is

exceeds 115 °C.

activated.

Check items (locations)

When external device is connected to CN80 connector:

1) Check for defect in external device.

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

When external device is not connected to CN80 connector:

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

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

• Check the lock of fan motor

(AC fan).

• Check wiring.

• Check outdoor service

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

• Check outdoor PMVs

(PMV1, 2, 4) 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 error in SV41, SV42 or SV43).

• Check connection of high-

pressure 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) 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 error in indoor

fan system (possible cause of air flow reduction).

• Check opening status of

indoor PMV.

• Check indoor-outdoor

communication line for wiring error.

• 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.

Page 92

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

P05 P05

Sub-code

SMMS (Series 1) 01: Open phase detected 02: Phase sequence error

SMMS-i (Series 4)

AI-NET central

00: 01: Compressor

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

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

P07 P07

Detected indoor address

P10 P10

P12 – – 11

control remote

controller

Location

detection

I/F Open phase detected,

I/F Detection of open

Description

Phase sequence error

phase / phase sequence

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

IPDU I/F

Indoor

Heat sink overheating error

Indoor overflow error All stop • Float switch

unit

Indoor unit

Indoor fan motor error Stop of

System

status

All stop • Phase sequence

All stop • Open phase is

Error detection

condition(s)

error was detected when the power is turned on.

• Open phase error was detected when the power is turned on.

detected when power is turned on.

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

All stop Temperature sensor

corresponding unit

built into IGBT (TH) is overheated.

operates.

• Float switch circuit is open-circuited or disconnected at connector.

• Motor speed measurements continuously deviate from target value.

• Overcurrent protection is activated.

Check items (locations)

• Check the phase sequence of outdoor power wiring.

• Check the outdoor PC board (I/F) error.

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

• Check power supply voltage.

• Check outdoor fan system error.

• Check heat sink cooling duct for clogging.

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

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

• Check float switch connector.

• Check operation of drain pump.

• Check drain pump circuit.

• Check drain pipe for clogging.

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

• Check connection of fan connector and wiring.

• Check for defect in fan motor.

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

• Check impact of outside air treatment (OA).

MG-CTT: Magnet contactor

Page 93

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

AI-NET central

P13 P13 – 47

01: TS condition

P15 P15

02: TD condition

P17 P17 – bb

P18 P18 –

control

remote

controller

Location

detection

I/F Outdoor liquid

Description System status

backflow detection error

I/F Gas

leakdetection (TS1 condition)

I/F Gas leak

detection (TD condition)

I/F Discharge

temperature TD2 error

I/F Discharge

temperature TD3 error

Error detection

condition(s)

All stop <During cooling operation>

All stop Protective shutdown due to

When system is in cooling operation, high pressure is detected in follower unit that has been turned off. <During heating operation> When system is in heating operation, outdoor PMV 1 or 2 continuously registers opening of 100p or less while under SH control.

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

All stop Protective shutdown due to

sustained discharge temperature (TD1, TD2 or TD3) at or above 108 °C for at least 10 minutes is repeated four times or more.

All stop Discharge temperature (TD2)

exceeds 115 °C.

All stop Discharge temperature (TD3)

exceeds 115 °C.

Check items (locations)

• Check full-close operation of outdoor PMV (1, 2, 4).

• Check for defect in Pd or Ps sensor.

• Check gas balancing circuit (SV2) for clogging.

• Check balance pipe.

• Check SV3B circuit for clogging.

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

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

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

• Check for insufficiency in refrigerant quantity.

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

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

• Check resistance characteristics of TD1, TD2 and TD3 sensors.

• Check indoor filter for clogging.

• Check piping for clogging.

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

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

• Check outdoor PMVs (PMV1, 2, 4) for clogging.

• Check resistance characteristics of TD2 sensor.

• Check for defect in 4-way valve.

• Check SV4 circuit for leakage.

• Check SV4 circuit (for wiring or installation error 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 SV43 circuit for leakage.

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

Page 94

Check code

Outdoor 7-segment display

Main

remote

controller

Check

code

Sub-code

Detected outdoor unit

AI-NET central

No.

P19 P19

P20 P20 – 22

control

remote

controller

Location

detection

I/F 4-way valve

Description System status

reversing error

I/F Activation of

high-pressure protection

Error detection

condition(s)

All stop Abnormal refrigerating cycle

data is collected during heating operation.

All stop Pd sensor detects pressure

equal to or greater than

3.6 MPa.

Check items (locations)

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

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

• Check resistance characteristics of TS1 and TE1 sensors.

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

• Check for wiring error involving TE1 and TL 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 PMVs (PMV1, 2, 4) for clogging.

• Check indoor / outdoor heat exchangers for clogging.

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

• Check SV2 circuit for clogging.

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

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

• Check opening status of indoor PMV.

• Check indoor-outdoor communication line for wiring error.

• 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.

Page 95

Main

remote

controller

P22 P22

Check code

Outdoor 7-segment display

Check

code

Sub-code

SMMS (Series 1) 08: Out of step 0A: IDC activation 0E: Sync error 0F: Control error 06: Maximum rotation exceeded 04: Rotation difference error 0D: Lock 0C: Fan lock

AI-NET central

control

remote

controller

Location

detection

IPDU Outdoor fan

Description System status

IPDU error

Error detection

condition(s)

All stop (Sub code: 08)

All stop (Sub code: 0A)

FAN IPDU position detection circuit Position detection is not performed properly.

FAN IPDU overcurrent protection circuit Overcurrent was detected when the fan started running or during operation.

All stop (Sub code: 0E)

FAN IPDU position detection circuit Position detection is not performed properly.

All stop (Sub code: 0F)

FAN IPDU position detection circuit Position detection is not performed properly.

All stop (Sub code: 06)

External factors such as blast Position detection is not performed properly. (Restarted in 6 seconds)

All stop (Sub code: 04)

External factors such as blast The difference between targeted rotation and actual rotation is 25% or more. (Restarted in 6 seconds)

All stop (Sub code: 0D)

FAN IPDU position detection circuit Position detection is not performed properly. (No wind)

All stop (Sub code: 0C)

External factors such as blast Position detection is not performed properly. (Wind blows) (Restarted in 6 seconds)

Check items (locations)

• Check the fan motor.

• Check the connector connection for fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the connector connection for fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the connector connection for fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the connector connection for fan motor.

• Check the error of IPDU board for fan.

• Check the fan motor.

• Check the error of IPDU board for fan.

Page 96

Check code

Main

remote

controller

Outdoor 7-segment display

Check

code

Sub-code

SMMS-i (Series 4) 0∗: IGBT circuit 1∗: Position detection circuit error 3∗: Motor lockup error 4∗: Motor current detection C∗: TH sensor temperature error D∗: TH sensor error E∗: Inverter DC voltage error

AI-NET central

(outdoor fan)

Note:

Although

P22 P22

P26 P26

letters 0 to F appear at locations indicated by “∗”, please ignore them.

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

01: Compressor 1 side

P29 P29

02: Compressor 2 side 03: Compressor 3 side

P31 – – 47

control

remote

controller

Location

detection

IPDU Outdoor fan

IPDU G-TR short-

Description System status

IPDU error

circuit protection error

IPDU Compressor

position detection circuit error

Indoor unit

Other indoor error (group follower unit error)

Error detection

condition(s)

All stop (Sub code: 0∗)

All stop (Sub code: 1∗)

All stop (Sub code: 3∗)

All stop (Sub code: 4∗)

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

All stop (Sub code: C∗)

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

All stop (Sub code: D∗)

All stop (Sub code: E∗)

All stop Overcurrent is momentarily

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.

All stop Position detection is not

going on normally.

Stop of corresponding unit

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

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 (A3IPDU).

• Check wiring and connector connection.

• Check for compressor layer short-circuit.

• Check for defect in A3IPDU P.C. board.

• Check indoor P.C. board.

Page 97

Errors detected by TCC-LINK central control device

Check code

Outdoor 7-segment display

Main

remote

controller

C05 – –

C06 – –

C12 – –

P30

Sub-code

Differs according to nature of alarm-causing error

(L20 displayed.)

AI-NET central

control

remote

controller

Location

detection

TCC-LINK TCC-LINK

Generalpurpose device I/F

TCC-LINK Group control

Description System status

central control device transmission error

TCC-LINK central control device reception error

Blanket alarm for generalpurpose device control interface

follower unit error

Duplicated central control address

Continued operation

Error detection

condition(s)

Central control device is unable to transmit signal.

Central control device is unable to receive signal.

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

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

There is duplication in central control addresses.

Check items (locations)

• 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 termination resistance 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 error input.

• Check check code of unit that has generated alarm.

• Check address settings.

Page 98

6-5. Sensor characteristics

Indoor unit

▼ Temperature sensor characteristics

Indoor TA sensor

Resistance

[kΩ]

Temperature [°C]

Indoor TC1 sensor

Temperature [°C] Resistance [kΩ]

Resistance [kΩ]

(10 °C or below)

Indoor TC2 and TCJ sensors

Resistance [kΩ]

(10 °C or below)

Temperature [°C]

Resistance [kΩ]

(10 °C or above)

Resistance [kΩ]

(10 °C or above)

Temperature [°C] Resistance [kΩ]

Temperature [°C]

Page 99

7 P.C. Board Exchange Procedures

 Indoor unit

7-1. Replacement of indoor P.C. boards

Part code Model type P.C. board type

MMU-AP∗∗4MH series

431-6V-437

431-6V-438 MMD-AP∗∗4BH series MCC-1402

431-6V-444

431-6V-469 MML-AP∗∗4H series MCC-1403

MMU-AP∗∗4SH series MMC-AP∗∗4H series MMD-AP∗∗4SPH series

MMU-AP∗∗4YH series MMD-AP∗∗4H series MMF-AP∗∗4H series MML-AP∗∗4BH series

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

The electrically erasable programmable read-only memory (hereinafter EEPROM, IC10) mounted on an indoor P.C. board holds important setting data, including the type and capacity codes intrinsic to the model (set at the factory), as well as the line / indoor / group addresses, high ceiling adjustment setting and the like (during installation, either automatically or manually). Proceed with the replacement of an indoor P.C. board assembly in accordance with the procedure described below.

After completion of the work, check the settings again, including the indoor unit No. and group header / follower designation, and confirm the integrity of the refrigerating cycle by conducting a test operation, etc.

MCC-1402

MCC-1403

Method 1

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

Reading EEPROM data: Procedure 1

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

Writing EEPROM data in new EEPROM: Procedure 3

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

Page 100

Method 2

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

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

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

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

Reading EEPROM data: Procedure 1

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

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

• The old EEPROM, supplied with the P.C. board to be replaced and now mounted on the service P.C. board, needs to be replaced with the new EEPROM, supplied with the service P.C. board.

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

Writing EEPROM data in new EEPROM: Procedure 3

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

Method 3

If it is not possible to read the setting data due to the failure of the EEPROM itself Replacing P.C. board and turning on power: Procedure 2

Writing EEPROM data on basis of information supplied by customer (e.g. high ceiling adjustment setting and optional connection setting): Procedure 3

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

Toshiba MMU-AP0074YH-TR, MMU-AP0094YH-TR, MMU-AP0124YH-TR, MMU-AP0154SH-TR, MMU-AP0184SH-TR SERVICE MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Original instruction

1 Wiring Diagrams

1-1. Compact 4-way cassette type

1-2. 1-way cassette type (compact type YH)

1-3. 1-way cassette type (SH)

1-4. Concealed duct standard type

1-5. Concealed duct high static pressure type

1-6. Slim duct type

1-7. Ceiling type

1-8. Floor standing cabinet type

1-9. Floor standing concealed type

1-10.Floor standing type

2 Parts Rating

2-1. Indoor unit

3 Refrigerant Cycle Diagram

4 Control Outline

5-1. Indoor controller block diagram

5-1-1. When main (sub) remote controller connected

5-1-2. When wireless remote controller kit connected

5-2. Indoor printed circuit board

5-4. Test operation of indoor unit

5-5. Method to set indoor unit function DN code

5-6. Applied control of indoor unit

6 Troubleshooting

6-1. Overview

6-2. Troubleshooting method

6-5. Sensor characteristics

7 P.C. Board Exchange Procedures

7-1. Replacement of indoor P.C. boards