Toshiba MMY-MAP0724HT6UL, MMY-MAP0964HT6UL, MMY-MAP1144HT6UL Service Manual

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AIR CONDITIONER (MULTI TYPE)

SERVICE MANUAL

FILE No. A11-019

Outdoor Unit

Model name:

MMY-MAP0724HT6UL MMY-MAP0964HT6UL MMY-MAP1144HT6UL

PRINTED IN JAPAN, Feb, 2012, TDOC

Contents

Generic Denomination: Air Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

New Refrigerant (R410A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2 Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2-1. Outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3 Parts Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3-1. Outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3-2. Outdoor inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3-3. Parts layout in outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3-4. Parts layout in inverter assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3-5. Outdoor (inverter) print circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3-5-1. Interface P.C. board (MCC-1606) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3-5-2. Inverter P.C. board for compressor (MCC-1595) A3-IPDU . . . . . . . . . . . . . . . . . . . . . . 27

3-5-3. Inverter P.C. board for fan (MCC-1610) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4 Refrigerant Piping Systematic Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5 Combined Refrigerant Piping System Schematic Diagrams. . . . . . . . . . . . . . . . . . 33

5-1. Normal operation (COOL mode / DEFROST mode) - high outside air temperature (roughly 68 °F

(20 °C) or above) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5-2. Normal operation (COOL mode) - low outside air temperature (roughly below 68 °F (20 °C)) . . 34

5-3. Normal operation (HEAT mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

5-4. Emergency operation (cooling operation under header outdoor unit backup scenario) . . . . . . . 36

5-5. Emergency operation (heating operation under header outdoor unit backup scenario) . . . . . . . 37

5-6. Refrigerant recovery from failed outdoor unit (pump-down operation under follower outdoor unit

backup scenario) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6 Control Outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7 Applied Control and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7-1. Applied control for outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7-1-1. Outdoor fan high static pressure shift. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7-1-2. Priority operation mode setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7-2. Applied control of outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

7-2-1. Power peak-cut control (standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7-2-2. Power peak-cut control (extended) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

7-2-3. Snowfall fan control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7-2-4. External master ON/OFF control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

7-2-5. Night operation (sound reduction) control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

7-2-6. Operation mode selection control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

7-2-7. Error/operation output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

7-2-8. Compressor operation output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7-2-9. Operating rate output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

8 Test Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8-1. Procedure and summary of test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8-2. Check items before test operation (before powering-on). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

8-3. Check at main power-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

8-4. Address setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8-4-1. Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8-4-2. Address setup and check procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8-4-3. Address setup procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8-4-4. Check after address setup when central control system is connected. . . . . . . . . . . . . . 79

8-5. Troubleshooting in test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8-5-1. A check code is displayed on the remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8-5-2. Operation from the indoor remote control is not accepted, and a check code is displayed

on the 7-segment display of the interface PC board of the header unit. . . . . . . . . . . . . 81

8-5-3. There is no display of a check code on the 7-segment display on the interface PC board of

the header unit, although there is indoor unit that is not accepting operation from the indoor

remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

8-5-4. In checking the number of connected outdoor units and connected indoor units after ad-

dress setup, a lower number of connected units is displayed. (There are outdoor/indoor

units that do not operate in a test operation.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

8-6. Test operation check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

8-6-1. Fan check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

8-6-2. Cooling/heating test operation check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

8-7. Service support function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

8-7-1. Check function for connecting of refrigerant and control lines . . . . . . . . . . . . . . . . . . . . 89

8-7-2. Function to start/stop (ON/OFF) indoor unit from outdoor unit. . . . . . . . . . . . . . . . . . . . 91

8-7-3. Error clearing function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

8-7-4. Remote control distinction function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

8-7-5. Pulse motor valve (PMV) forced open/close function in indoor unit. . . . . . . . . . . . . . . . 99

8-7-6. Pulse motor valve (PMV) forced open fully/close fully function in outdoor unit . . . . . . . 99

8-7-7. Solenoid valve forced open/close function in outdoor unit . . . . . . . . . . . . . . . . . . . . . . 100

8-7-8. Fan operation check in outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

8-7-9. Abnormal outdoor unit discrimination method by fan operating function . . . . . . . . . . . 102

8-7-10. Manual adjustment function of outside temperature (TO) sensor . . . . . . . . . . . . . . . . 103

8-7-11. Monitor function of remote control switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

9-1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

9-2. Troubleshooting method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

9-3. Troubleshooting based on information displayed on remote control . . . . . . . . . . . . . . . . . . . . . 114

9-4. Check codes displayed on remote control and SMMS-i outdoor unit (7-segment display on I/F

board) and locations to be checked. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

9-5. Diagnosis procedure for each check code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

9-6. 7-segment display function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

9-7. Oil level judgment display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

9-8. Leakage/clogging of refrigerating cycle circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

9-9. Sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

9-10. Pressure sensor output check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

10 Backup Operation (Emergency Operation). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

10-1. Note for backup operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

10-2. Compressor backup operation setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

10-3. Outdoor unit backup operation setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

10-3-1. Follower outdoor unit backup operation setting (failure of follower outdoor unit) . . . . . 181

10-3-2. Header outdoor unit backup operation setting (failure of header outdoor unit) . . . . . . 183

10-4. Cooling-season outdoor unit backup operation setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

11 Outdoor Unit Refrigerant Recovery Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

11-1. Refrigerant recovery from failed outdoor unit (pump-down) . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

11-1-1. Note for refrigerant recovery operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

11-1-2. Refrigerant recovery procedure A (case of no outdoor unit backup operation setting) 186

11-1-3. Refrigerant recovery procedure B (case of outdoor unit backup operation setting). . . 189

11-2. How to operate system while failed outdoor unit being repaired . . . . . . . . . . . . . . . . . . . . . . . . 191

11-3. Work procedure after repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

12 Replacing Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

12-1. Compressor replacement procedure (outline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

12-2. Replacement of compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

12-3. Check procedure to search cause of compressor oil shortage . . . . . . . . . . . . . . . . . . . . . . . . . 198

13 Outdoor Unit Parts Replacement Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

14 P.C. Board Exchange Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

14-1. Replacement of outdoor P.C.board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

14-1-1. List of service P.C. boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

14-1-2. Configuration of inverter assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

14-1-3. Interface board replacement procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

14-1-4. Inverter P.C. board for compressor replacement procedure . . . . . . . . . . . . . . . . . . . . 222

14-1-5. Fan IPDU P.C. board (MCC-1610) replacement procedure. . . . . . . . . . . . . . . . . . . . . 224

14-1-6. Noise filter P.C. board (MCC-1625 A, B, C) replacement procedure . . . . . . . . . . . . . . 225

15 Exploded Diagram / Parts Price List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

Generic Denomination: Air Conditioner

Definition of Qualified Installer or Qualified Service Person

The air conditioner must be installed, maintained, repaired and 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 person to do them for you.

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 undertaking 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.

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]

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

[Explanation of illustrated marks]

Work undertaken Protective gear worn

All types of work

Protective gloves ‘Safety’ working clothing

Electrical-related work

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

Work done at heights (50 cm or more)

Helmets for use in industry

Transportation of heavy objects Shoes with additional protective toe cap

Repair of outdoor unit Gloves to provide protection for electricians and from heat

Indication Explanation

DANGER

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.

WARNING

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.

CAUTION

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.

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.

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.

CAUTION

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

Precautions for Safety

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

DANGER

Turn off breaker.

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.

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

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.

Prohibition

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 control 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.

Stay on

protection

If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical control 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.

WARNING

General

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 19.7 in (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 electrical control 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 result 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 (10kg or heavier) such as a compressor is carried by two persons.

Check earth

wires.

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.

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

Use specified

parts.

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 required specifications may give rise to electric shocks, smoking and/ or a fire.

Do not bring a

child close to

the

equipment.

If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical control 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.

Insulating measures

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.

No fire

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.

Refrigerant

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

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.

Insulator

check

After the work has finished, be sure to use an insulation tester set (500V Megger) to check the resistance is 1MΩ 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.

Ventilation

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.

Compulsion

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.

Check after

repair

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 there is no trouble. If check is not executed, a fire, electric shock or injury may be caused. For a check, turn off the power breaker.

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

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

Be sure to fix the screws back which have been removed for installation or other purposes.

Do not

operate the

unit with the

valve closed.

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.

Check after

reinstallation

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.

Cooling check

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.

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.”

Installation

Only a qualified installer (*1) or qualified service person (*1) is allowed to install 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 outdoor 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.

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.

Carrying in the Outdoor Unit

CAUTION

Handle the outdoor unit carefully, observing the following items.

• To use a forklift or other machinery for loading / unloading in transportation, insert the prongs of the forklift into the rectangular holes for handling as shown below.

• To lift up the unit, insert a rope capable of bearing the weight of the unit into the rectangular holes shown below. Tie the unit from 4 sides. (Apply padding in positions where the rope comes in contact with the outdoor unit so that no damage is caused to the outer surface of the outdoor unit.) (There are reinforcing plates on the side surfaces, so the rope cannot be passed through.)

Front / Back

Correct Incorrect Incorrect

Plaster

Rope

Plaster

Rectangular holes for lifting

Reinforcing plate

Prongs of the forklift

Rectangular

holes for handling

Correct

Incorrect

Side

 Weight centre and weight

◆ Weight centre of an outdoor unit

Unit: in (mm)

 Screw size and tightening torque

Model type

(in (mm))Y (in (mm))Z (in (mm))

Weight (lb (kg))

(A) MAP0724HT6UL 21.3” (540) 15.8” (400) 24.4” (620) 621 (281)

(B)

MAP0964HT6UL

25.8” (655) 15.4” (390) 25.6” (650) 817 (370)

MAP1144HT6UL

Screw size

Tightening torque

(ft•lbs (N•m))

Power supply terminal M8 4.1 to 4.8 (5.5 to 6.6)

Ground screw M8 4.1 to 4.8 (5.5 to 6.6)

Control wire terminal M3.5 0.6 to 0.7 (0.80 to 0.96)

Anchor bolt position

27.6” (700)

Anchor bolt position

36.2” (920)

Anchor bolt position

29.7” (755)

Anchor bolt position

29.7” (755)

 Adding refrigerant

After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of refrigerant.

 Calculation of additional refrigerant charge amount

Table 3

Table 4

Example: (114 type)

Additional refrigerant charge amount

(lb)

Actual length of liquid

pipe

Additional refrigerant charge

amount per liquid pipe 1ft

[Table 3]

Adjustment amount of

refrigerant

[Table 4]

Liquid pipe outer dia. Ø1/4 Ø3/8 Ø1/2 Ø5/8 Ø3/4

Additional refrigerant amount / 1 ft (lb) 0.017 0.037 0.071 0.108 0.168

Outdoor unit capacity type

Adjustment amount of refrigerant

(lb)

Combined outdoor units

072 type 3.31 072 type –

096 type 13.23 096 type –

114 type 15.43 114 type –

144 type 0.00 072 type 072 type

168 type 16.53 096 type 072 type

192 type 27.56 096 type 096 type

228 type 27.56 114 type 114 type

L1 Ø1/2: 30 ft L2 Ø1/2: 15 ft L3 Ø3/8: 10 ft

a Ø1/4: 10 ft b Ø3/8: 15 ft c Ø1/4: 10 ft d Ø1/4: 10 ft

Additional charge amount (lb)

(Lx × 0.017 lb/ft) + (Ly × 0.037 lb/ft) + (Lz X 0.071 lb/ft) + (15.43 lb)

((a+c+d)×0.017 lb)+((L3+b)× 0.037 lb)+((L1+L2)× 0.017 lb+(15.43 lb)

(30 × 0.017 lb) + (25 × 0.037 lb) + (45 × 0.071 lb) + (15.43 lb)

20.06 lb

Lx : Actual total length of liquid pipe Ø1/4 (ft)

Ly : Actual total length of liquid pipe Ø3/8 (ft)

Lz : Actual total length of liquid pipe Ø1/2 (ft)

abcd

New Refrigerant (R410A)

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

1. Safety Caution Concerned to New Refrigerant

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

2. Cautions on Installation/Service

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

For the tools exclusive to R410A, shapes of all the joints including the service port differ from those of the former refrigerant in order to prevent mixture of them.

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

specified for R410A.

(3) In the installation time, use clean pipe materials and work with great attention so that water and others do not

mix in because pipes are affected by impurities such as water, oxide scales, oil, etc. Use the clean pipes.

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

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

change.)

3. Pipe Materials

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

(1) Copper pipe

(2) Joint

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

of the air conditioner. However clear impurities when using them.

The pipe thickness, flare finishing size, flare nut and others differ according to a refrigerant type. When using a long copper pipe for R410A, it is recommended to select “Copper or copper-base pipe without seam” and one with bonded oil amount 40mg/10m or less. Also do not use crushed, deformed, discolored (especially inside) pipes. (Impurities cause clogging of expansion valves and capillary tubes.)

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

4. Tools

(1) Required Tools for R410A

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

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

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

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

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

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

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

Explanation of symbols

: Newly prepared (It is necessary to use it exclusively with R410A, separately from those for R22 or R407C.) : Former tool is available.

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

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

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

Used tools Usage Proper use of tools/parts

Gauge manifold

Vacuuming, charging refrigerant and operation check

Exclusive to R410A

Charging hose Exclusive to R410A

Charging cylinder Charging refrigerant Unusable (Use the Refrigerant charging balance.)

Gas leak detector Checking gas leak Exclusive to R410A

Vacuum pump Vacuum drying Usable if a counter-flow preventive adapter is attached

Vacuum pump with counterflow Vacuum drying R22 (Existing article)

Flare tool Flare processing of pipes Usable by adjusting size

Bender Bending processing of pipes R22 (Existing article)

Refrigerant recovery device Recovering refrigerant Exclusive to R410A

Torque wrench Tightening flare nut Exclusive to Ø1/4” (6.4 mm) to Ø5/8” (15.9 mm)

Pipe cutter Cutting pipes R22 (Existing article)

Refrigerant canister Charging refrigerant

Exclusive to R410A Enter the refrigerate name for identification

Welding machine/Nitrogen gas cylinder

Welding of pipes R22 (Existing article)

Refrigerant charging balance Charging refrigerant R22 (Existing article)

General tools (Conventional tools can be used.)

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

(1) Vacuum pump

Use vacuum pump by attaching vacuum pump

adapter. (2) Torque wrench (3) Pipe cutter (4) Reamer (5) Pipe bender (6) Level vial

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

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

(3) Insulation resistance tester (4) Electroscope

1 Specifications

(System with Non ducted indoor units)

460 V / 3 Ph / 60 Hz

(Heat pump model)

TOSHIBA Carrier VRF Air conditioner

Outdoor unit model name MMY- MAP0724HT6UL MAP0964HT6UL MAP1144HT6UL

Cooling Capacity (*1) kBtu/h 72 96 114

Heating Capacity (*1) kBtu/h 81 108 128

Power supply (*2) 460 V 3 phase 60 Hz

Starting Current A Soft Start

Dimension

Unit

Height In 72.8 72.8 72.8

Width In 39.0 47.6 47.6

Depth In 30.7 30.7 30.7

Packing

Height In 76.3 76.3 76.3

Width In 41.8 50.5 50.5

Depth In 32.6 32.6 32.6

Total Weight Unit lb 621 817 817

Packed unit lb 654 855 855

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

Compressor Type Hermetic twin rotary compressor

Motor output kW 2.3 x 2 2.1 x 3 2.5 x 3

Fan unit Fan Propeller fan

Motor output W 1,000 1,000 1,000

Air volume cfm 5,800 6,600 7,060

Heat exchanger Finned tube

Refrigerant R410A (Charged refrigerant amount(lb)) (*3) 25.4 25.4 25.4

High-pressure switch psi OFF: 420 ON: 540

Protective devices High-pressure switch / High-pressure sensor /

Low-pressure sensor / Fusible plug / PC board fuse /

Inverter overload protector

Electrical specifications

Unit

MCA (*4) A 18 23 24

MOCP (*5) A 20 25 25

Refrigerant piping

Connecting port dia

Gas side (main pipe) In 7/8” 7/8” 1-1/8”

Liquid side (main pipe) In 1/2” 1/2” 1/2”

Balance pipe In 3/8” 3/8” 3/8”

System interconnection wiring (Up to 3280 ft) Shielded wire AWG16 x 2 cores

(Up to 6560 ft) Shielded wire AWG14 x 2 cores

Operation temperature range Cooling FDB 23 to 109

Heating FWB 5 to 60

Max external static pressure In WG 0.20 0.20 0.20

Max. No. of connected indoor units 12 16 19

Sound pressure level Cooling/Heating dB(A) 56/57 60/62 62/63

(*1) Rated conditions Cooling : Indoor 80 degF Dry Bulb / 67 degF Wet Bulb, Outdoor 95 degF Dry Bulb.

Heating : Indoor 70 degF Dry Bulb, Outdoor 47 degF Dry Bulb / 43 degF WetBulb. (*2) The source voltage must not fluctuate more than ±10 % (*3) The amount dose not consider extra piping length. Refrigerant must be added on site in accordance with the actual

piping length.

(*4) Select wire size base on the larger value of MCA.

MCA : Minimum Circuit Amps (minimum circuit Amps required for power supply design.)

(*5) MOCP : Maximum Overcurrent Protection (Amps)

460 V / 3 Ph / 60 Hz

(Heat pump model)

TOSHIBA Carrier VRF Air conditioner

Outdoor unit set model name MMY-

AP1444HT6UL AP1684HT6UL AP1924HT6UL AP2284HT6UL

Outdoor unit model name

MMY-MAP

0724HT6UL 0724HT6UL 0964HT6UL 0724HT6UL 0964HT6UL 0964HT6UL 1144HT6UL 1144HT6UL

Cooling Capacity (*1) kBtu/h 144 168 192 220

Heating Capacity (*1) kBtu/h 162 189 212 247

Power supply (*2) 460 V 3 phase 60 Hz

Starting Current A Soft Start

Dimension

Unit

Height In 72.8 72.8 72.8 72.8 72.8 72.8 72.8 72.8

Width In 39.0 39.0 47.6 39.0 47.6 47.6 47.6 47.6

Depth In 30.7 30.7 30.7 30.7 30.7 30.7 30.7 30.7

Packing

Height In 76.3 76.3 76.3 76.3 76.3 76.3 76.3 76.3

Width In 41.8 41.8 50.5 41.8 50.5 50.5 50.5 50.5

Depth In 32.6 32.6 32.6 32.6 32.6 32.6 32.6 32.6

Total Weight Unit lb 621 621 817 817 817 817 817 817

Packed unit lb 654 654 855 855 855 855 855 855

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

Compressor Type Hermetic twin rotary compressor

Motor output kW 2.3 x 2 2.3 x 2 2.1 x 3 2.3 x 2 2.1 x 3 2.1 x 3 2.5 x 3 2.5 x 3

Fan unit Fan Propeller fan

Motor output W 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000

Air volume cfm 5,800 5,800 6,600 5,800 6,600 6,600 7,060 7,060

Heat exchanger Finned tube

Refrigerant R410A(Charged refrigerant amount(lb))

(*3) 25.4 25.4 25.4 25.4 25.4 25.4 25.4 25.4

High-pressure switch psi OFF: 420 ON: 540

Protective devices High-pressure switch / High-pressure sensor / Low-pressure sensor /

Fusible plug / PC board fuse / Inverter overload protector

Electrical specifications

Unit

MCA (*4) A 18 18 23 18 23 23 24 24

MOCP (*5)A 2020252025252525

Refrigerant piping

Connecting port dia

Gas side (main pipe) In 1-1/8" 1-1/8" 1-1/8" 1-3/8"

Liquid side (main pipe)

In 5/8" 5/8" 5/8" 3/4"

Balance pipe In 3/8” 3/8” 3/8” 3/8”

System interconnection wiring (Up to 3280 ft) Shielded wire AWG16 x 2 cores

(Up to 6560 ft) Shielded wire AWG14 x 2 cores

Operation temperature range

Cooling FDB 23 to 109

Heating FWB 5 to 60

Max external static pressure In WG 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20

Max. No. of connected indoor units 24 28 32 38

Sound pressure level Cooling/Heating dB(A) 59/60 61.5/63.5 63/65 65/66

(*1) Rated conditions Cooling : Indoor 80 degF Dry Bulb / 67 degF Wet Bulb, Outdoor 95 degF Dry Bulb.

Heating : Indoor 70 degF Dry Bulb, Outdoor 47 degF Dry Bulb / 43 degC WetBulb. (*2) The source voltage must not fluctuate more than ±10 % (*3) The amount dose not consider extra piping length. Refrigerant must be added on site in accordance with the actual

piping length.

(*4) Select wire size base on the larger value of MCA.

MCA : Minimum Circuit Amps (minimum circuit Amps required for power supply design.)

(*5) MOCP : Maximum Overcurrent Protection (Amps)

2 Wiring Diagrams

2-1. Outdoor unit

Models: MMY-MAP0724HT6UL

POWER SUPPLY

3~60Hz 460V

Connector for optional P.C.Board

SWRT

(Service)

Compressor terminal

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRN : BROWN

GRN : GREEN

PUR : PURPLE

Color indication

P.C.Board

Symbol Parts name

MCC-1596 Inverter P.C.Board (Compressor)

MCC-1606 Interface Control P.C.Board

MCC-1610 Inverter P.C.Board (Fan)

MCC-1625A Noise filter P.C.Board A

MCC-1625B Noise filter P.C.Board B

MCC-1625C Connection P.C.Board

Symbol Parts name

4WV1 4-way valve coil

63H1, 63H2 High pressure switch

CM1, CM2 Compressor

CN-R Relay connector

CN*** Connect or

(MCC-1596)

F01,F02

Fuse (Compressor)

31.5A 500V~

(MCC-1606)

F01, F02

Fuse (Interface)

T6.3A 250V~

(MCC-1610)

F500

Fuse (Fan)

15A 250V~

(MCC-1625A)

F01, F02, F03

Fuse (Noise filter)

T6.3A 250V~

(MCC-1625C)

F70, F71

Fuse (Transformer)

T8A 600V~

FM Fan motor

HEATER1, HEATER2

Compressor case heater

A.HEATER Accumulator case heater

L-CM1, L-CM2 Reactor for compress or

L-FM Reactor for fan

Mg-CTT Magnet contactor

PD Pressure sensor (High)

PS Pressure sensor ( Low)

PMV1, PMV2 Pulse motor valve ( main)

RB Rush current protect resistor

SV2, SV3A, SV3B, SV3C

SV3D, SV3E, SV41, SV42

SV51

2-way valve coil

SW01, SW02, SW03

Rotary switch

SW04, SW05, SW15

Push button switch

SW06, SW07, SW09, SW10

SW11, SW12, SW13, SW14

SW16, SW17, SW30

Dip switch

TD1, TD2 Pipe temp. sensor ( discharge)

TE1 Heat excha nge temp. sensor

TK1, TK2, TK4, TK5 Oil temp. sensor

TL1 Liquid temp. sensor

TO Air temp. sensor

TS1 Pipe temp. sensor (suction)

TB1 Termin al block (power supply)

TB2 Terminal b lock (controll wiring)

TR Transformer

Field wiring

Protective earth

Terminal block

Terminal

Connector

P.C.board

*Noise filter P.C. boards are installe d

on a back of terminal block.

Parts layout

TO INDOOR TO CENTRAL TO OUTDOOR

UNIT CONTROLLER UNIT

Models: MMY-MAP0964HT6UL and MAP1144HT6UL

POWER SUPPLY

3~60Hz 460V

TO INDOOR TO CENTRAL TO OUTDOOR

UNIT CONTROLLER UNIT

Connector for optional P.C.Board

SWRT

(Service)

Compressor terminal

RED : RED

WHI : WHITE

YEL : YELLOW

BLU : BLUE

BLK : BLACK

GRY : GRAY

PNK : PINK

ORN : ORANGE

BRN : BROWN

GRN : GREEN

PUR : PURPLE

Color indication

P.C.Board

Symbol Parts name

MCC-1596 Inverter P.C.Board (Compressor)

MCC-1606 Interface Control P.C.Board

MCC-1610 Inverter P.C.Board (Fan)

MCC-1625A Noise filter P.C.Board A

MCC-1625B Noise filter P.C.Board B

MCC-1625C Connection P.C.Board

Symbol Parts name

4WV1 4-way valve coil

63H1, 63H2, 63H3 High pressure switch

CM1, CM2, CM3 Compressor

CN-R Relay connector

CN*** Connector

(MCC-1596)

F01, F02

Fuse (Compressor)

31.5A 500V~

(MCC-1606)

F01, F02

Fuse (Interface)

T6.3A 250V~

(MCC-1610)

F500

Fuse (Fan)

15A 250V~

(MCC-1625A)

F01, F02, F03

Fuse (Noise filter)

T6.3A 250V~

(MCC-1625C)

F70, F71

Fuse (Transformer)

T8A 600V~

FM Fan motor

HEATER1, HEATER2

HEATER3

Compressor case heater

A.HEATER Accumulator case heater

L-CM1, L-CM2, L-CM3

Reactor for compressor

L-FM Reactor for fan

Mg-CTT Magnet contactor

PD Pressure sensor (High)

PS Pressure sensor (Low)

PMV1, PMV2 Pulse motor valve (main)

PMV4 Pulse motor valve (sub)

RB Rush current protect resistor

SV2, SV3A, SV3B, SV3C

SV3D, SV3E, SV3F, SV41

SV42, SV43, SV61

2-way valve coil

SW01, SW02, SW03 Rotar y switch

SW04, SW05, SW15 Pus h button switch

SW06, SW07, SW09, SW10

SW11, SW12, SW13, SW14

SW16, SW17, SW30

Dip switch

TD1, TD2, TD3 Pipe temp. sensor (discharge)

TE1, TE2 Heat exchange temp. sensor

TK1, TK2, TK3, TK4, TK5

Oil temp. sensor

TL1 Liquid temp. sensor

TO Air temp. sensor

TS1 Pipe temp. s ensor (suction)

TB1 Terminal bl ock (power supply)

TB2 Terminal bloc k (controll wiring)

TB3

Terminal block

(internal wiring connector)

TR Transformer

Field wiring

Protective earth

Terminal block

Terminal

Connector

P.C.board

*Noise filter P.C. boards are installed on

a back of terminal block (TB1,TB2).

Parts layout

3 Parts Rating

3-1. Outdoor unit

Name Model Specification

MMY-MAP0724∗

MMY-MAP0964∗

MMY-MAP1144∗

1 Compressor DA421A3FB-29M1 Output: 2.3 kW×2 O

1 Compressor DA421A3FB-29M1 Output: 2.1 kW×3 O

2 4-way valve coil STF AC208-230 V 60 Hz O O O

3 Pulse motor valve coil HAM-BD28TF-2 DC12 V O O O

2-way valve coil VPV AC208-230 V 60 Hz

SV2,SV3A,SV3B,SV3C,SV3D,SV3E

AC208-230 V 60 Hz SV2,SV3A,SV3B,SV3C,SV3D,SV3E,SV3F,SV6

2-way valve coil FQ-D640 AC208-230 V 60 Hz

SV41,SV42,SV5

AC208-230 V 60 Hz SV41,SV42,SV43

6 High-pressure SW ACB-4UB OFF:3.73 MPa ON:2.9 MPa O O O

7 Pressure sensor (For high pressure) NSK-BC038F-U220 0.5~4.3 V / 0~3.73 MPa O O O

8 Pressure sensor (For low pressure) NSK-BC010F-U220 0.5~3.5 V / 0~0.98 MPa O O O

9 Fan motor STF-340A1000-1 DC280 V / 1 kW O O O

10 Case heater (For comp.) AC240 V / 29 W O O O

11 Case heater (For accum.) AC240 V / 55 W O O O

12 Fusible plug 73 °C O O O

3-2. Outdoor inverter

Name Model Specification

MMY-MAP0724*

MMY-MAP0964*

MMY-MAP1144*

1 Power supply terminal block HP-T3015-31-3P-L3S AC600 V / 100 A, 3 P O O O

4 Relay terminal block for reactor JXO-6B AC300 V / 20 A, 6 P O O

5 Communication terminal block JXO-B2H AC30 V (or no more than DC42 V) / 1 A, 6 P O O O

6 Reactor (For comp.) CH-79 5.8 mH / 16 A O O O

7 Reactor (For fan) CH-55 5.8 mH / 14 A O O O

8 Noise Filter P.C. board (MCC-1625) MCC-1625 — O O O

9 Line Filter — 2.7 mH / 35 A O O O

Interface P.C. board [Outdoor control P.C. board] (MCC-1606)

MCC-1606

—OOO

Inverter P.C. board for Compressor [A3 IPDU] (MCC-1596)

MCC-1596

—OOO

12 Fuse (MCC-1596) GAC1 31.5A 31.5 A / AC500 V (P.C. board) O O O

13 Comp. Motor drive IPM (MCC-1596) PS22A76 25 A / DC1200 V (P.C. board) O O O

Inverter P.C. board for fan [FAN IPDU] (MCC-1610)

MCC-1610

—OOO

15 Fuse (MCC-1610) CES15 15AF924 15 A / AC250 V (P.C. board) O O O

16 Fan motor drive IPM (MCC-1610) FSBB20CH60C 20 A / DC600 V (P.C. board) O O O

17 Pipe temp. sensor (TD) — -30 °C – 135 °C (Ambient temp. range) O O O

18 Pipe temp. sensor (TS) — -20 °C – 80 °C (Ambient temp. range) O O O

19 Heat exchanger temp. sensor (TE) — -20 °C – 80 °C (Ambient temp. range) O O O

20 Outside temp. sensor (TO) — -20 °C – 80 °C (Ambient temp. range) O O O

21 Oil temp. sensor (TK) — -30 °C – 135 °C (Ambient temp. range) O O O

22 Liquid temp. sensor (TL) — -20 °C – 80 °C (Ambient temp. range) O O O

3-3. Parts layout in outdoor unit

Model: MMY-MAP0724HT6UL

Front side Rear side

SV42 valve

SV41 valve

TD2 sensor

Accumulator

Compressor1

Compressor2

High pressure

SW2

High pressure

SW1

Check joint

(Liqid pipe)

TL sensor

Check joint

(High pressure)

High pressure

sensor

4-way valve

PMV

(Pulse Motor Valve)

Check joint

(Low pressure)

TS sensor

Low pressure

sensor

TE1 sensor

TO sensor

SV3D valve

SV2 valve

SV3E valve

SV3C valve

SV5 valve

SV3B valve

TK5 sensor

TK4 sensor

SV3A valve

TK1 sensor

TK2 sensor

Liqid tank

Fusible plug

Accumulator

TD1 sensor

Transfomer

Model: MMY-MAP0964HT6UL, MAP1144HT6UL

Front side Rear side

SV42 valve

SV41 valve

TD2 sensor

TD1 sensor

Accumulator

Compressor1

Compressor2

High pressure

SW2

High pressure

SW1

Check joint

(Liqid pipe)

TL sensor

Check joint

(High pressure)

High pressure

sensor

4-way valve

PMV

(Pulse Motor Valve)

Check joint

(Low pressure)

TS sensor

Low pressure

sensor

TE1 sensor

TO sensor

SV3D valve

SV2 valve

SV3E valve

SV3C valve

SV6 valve

SV3B valve

TK5 sensor

TK4 sensor

SV3A valve

TK1 sensor

TK2 sensor

Liqid tank

Fusible plug

Accumulator

SV3F valve

TK3 sensor

TE2 sensor

High pressure

SW3

SV43 valve

Compressor3

Transformer

3-4. Parts layout in inverter assembly

Outdoor Unit (6ton) Model: MMY-MAP0724HT6UL

Noise Filter P.C. board (MCC-1625)

Interface P.C. board [Outdoor control P.C. board] (MCC-1606)

Inverter P.C. board for fan

[FAN IPDU]

(MCC-1610)

Power supply terminal block

Relay connector for central control

Communication terminal block

Magnet Contactor

Inverter P.C. board for Compressor 2 [A3 IPDU] (MCC-1596)

Inverter P.C. board for Compressor 1 [A3 IPDU] (MCC-1596)

Thermistor

Outdoor Unit (8, 10ton) Model: MMY-MAP0964HT6UL, MAP1144HT6UL

Thermistor

Interface P.C. board [Outdoor control P.C. board] (MCC-1606)

Inverter P.C. board for fan [FAN IPDU] (MCC-1610)

Noise Filter P.C. board (MCC-1625)

Power supply terminal block

Relay connector for central control

Communication terminal block

Inverter P.C. board for Compressor 3 [A3 IPDU] (MCC-1596)

Inverter P.C. board for Compressor 2 [A3 IPDU] (MCC-1596)

Inverter P.C. board for Compressor 1 [A3 IPDU] (MCC-1596)

Relay terminal block for reactor

Magnet Contactor

3-5. Outdoor (inverter) print circuit board

3-5-1. Interface P.C. board (MCC-1606)

Sensor input

Option input/output

PMV1 output

PMV2 output

PMV4 output

UART communication

Jumper select

For inter-unit cable between indoor and outdoor units

For inter-unit cable between outdoor units

B. Heater

High pressure SW

7-segment LED

PD sensor

PS sensor

Dyna-doctor connecting terminal

4-way valve output

Accumulator heater

Comp. case heater 3

Comp. case heater 2

Comp. case heater 1

3-5-2. Inverter P.C. board for compressor (MCC-1595) A3-IPDU

SW800 For inverter address setting

Compressor output W-phase CN203

Compressor output V-phase CN202

Compressor output U-phase CN201

Reactor connecting terminal CN10

Reactor connecting terminal CN09

Power supply input L1 CN01

Power supply input L2 CN02

Power supply input L3 CN03

CN851 UART communication

CN852 UART communication

3-5-3. Inverter P.C. board for fan (MCC-1610)

UART communication between interface

Fan motor output U-phase

Fan motor output V-phase

Fan motor output W-phase

UART communication between A3-IPDU

Reactor connecting terminal

Power supply input

3-5-4. Noise Filter PC board (MCC-1625 -A, -B, -C)

Power supply input L3 CN13

Power supply input L2 CN12

Power supply input L1 CN11

Power supply output to FAN CN24

Power supply output to I/F CN22

Power supply output to FAN CN23

Power supply input L3 CN33

Power supply input L2 CN32

CN51 To Noise Filter C

MCC-1625-A

Power supply input L1 CN31

MCC-1625-B

MCC-1625-C

220 V output to N/F-B CN72

460 V input from N/F-A CN73

220 V input from Transformer CN70

220 V input from Transformer CN71

460 V output to Transformer CN74

Power supply output L1 CN41

Power supply output L2 CN42

Power supply output L3 CN43

CN52

To Noise Filter C

4 Refrigerant Piping Systematic Drawing

Model: MMY-MAP0724HT6UL

Fan

4-way valve

Right side

Heat exchanger

Left side

Heat exchanger

Fusible

plug

Check valve

Liquid side

packed valve

Gas side

service valve

Balance pipe

packed valve

Liquid tank

Reducer

Low-pressure sensor

Fusible plug

Accumulator

Check valve

High-pressure switch

Check valve

Oil header

Check

valve

High-pressure

switch

Oil separator

Compressor

(Inverter)

Compressor

(Inverter)

Solenoid

valve

Capillary

tube

Check

valve

Check joint

Strainer

Temperature

sensor

Distributor

Symbol

High-pressure sensor

Check valve

Fan motor

Check valve

Model: MMY-MAP0964HT6UL, MMY-MAP1144HT6UL

Fan

4-way valve

Right side

Main heat exchanger

Left side

Main heat exchanger

Fusible

plug

Check valve

Liquid side

packed valve

Gas side

service valve

Balance pipe packed valve

Liquid tank

Low-pressure sensor

Fusible plug

Accumulator

High-pressure switch

Oil header

High-pressure

switch

Oil separator

Solenoid

valve

Capillary

tube

Check

valve

Check joint

Strainer

Temperature

sensor

Distributor

Symbol

High-pressure sensor

Fan motor

Sub heat exchanger at right side

Sub heat exchanger at left side

Check valve

Highpressure switch

Compressor

(Inverter)

Compressor

(Inverter)

Compressor

(Inverter)

Explanation of Functional Parts

Functional part name Fun c t io na l outline

Solenoid valve

SV3A

(Connector CN321: White)

1) Supplies oil reserved in the oil header during ON time.

SV3B

(Connector CN321: White)

1) Returns oil supplied in the balance pipe to the compressor.

SV3C

(Connector CN321: White)

1) Pressurizes oil reserved in the oil header during ON time.

SV3D

(Connector CN322: White)

1) Reserves oil in the oil separator during OFF time.

2) Returns oil reserved in the oil separator to the compressor during ON time.

SV3E

(Connector CN322: White)

1) Turns on during operation and balances oil between compressors.

SV3F

(Connector CN323: White)

1) Controls oil level balances between compressors.

SV2

(Hot gas bypass) (Connector CN311: White)

1) Low pressure release function

2) High pressure release function

3) Gas balance function during stop time

SV41 SV42 SV43

(Start compensation valve of compressor) (SV41 Connector CN312: Blue, SV42 Connector CN312: Blue, SV43 Connector CN313: Red)

1) For gas balance start

2) High pressure release function

3) Low pressure release function

SV5

(Connector CN314: White)

1) Preventive function for high-pressure rising in heating operation

SV6

(Connector CN315: White)

1) Liquid bypass function for discharge temperature release (cooling bypass function)

4-way valve

(Connector CN317:Blue)

1) Cooling/heating exchange

2) Reverse defrost

Pulse motor valve

PMV1, 2

(Connector CN300, 301: White)

1) Super heat control function in heating operation

2) Liquid line shut-down function while follower unit stops

3) Under cool adjustment function in cooling operation

4) Exchange function between main and sub exchangers in cooling operation

PMV4

(Connector CN303: Red)

1) Exchange function between main and sub exchangers in cooling operation

2) Preventive function for high-pressure rising in heating operation

Oil separator

1) Prevention for rapid decreasing of oil (Decreases oil flowing to the cycle)

2) Reserve function of surplus oil

Temp. Sensor

TD1 TD2 TD3

(TD1 Connector CN502: White, TD2 Connector CN503: Pink, TD3 Connector CN504: Blue)

1) Protection of compressor discharge temp.

2) Used for discharge temperature release

TS1

(Connector CN505: White)

1) Controls PMV super heat in heating operation

TE1

(Connector CN520: Green)

1) Controls defrost in heating operation

2) Controls outdoor fan in heating operation

TE2

(Connector CN521: Red)

1) Controls exchange function between main and sub exchangers

TK1, TK2 TK3, TK4 TK5

(TK1 Connector CN531: Black, TK2 Connector CN532: Green, TK3 Connector CN533: Red, TK4 Connector CN534: Yellow, TK5 Connector CN535: Red)

1) Judges oil level of the compressor

(Connector CN523: White)

1) Detects under cool in cooling operation

(Connector CN507: Yellow)

1) Detects outside temperature

Pressure sensor

High pressure sensor

(Connector CN501: Red)

1) Detects high pressure and controls compressor capacity

2) Detects high pressure in cooling operation, and controls the fan in low ambient cooling operation

3) Detects under cool in indoor unit in heating operation

Low pressure sensor

(Connector CN500: White)

1) Detects low pressure in cooling operation and controls compressor capacity

2) Detects low pressure in heating operation, and controls the super heat

Heater

Compressor case heater

(Compressor 1 Connector CN331: White, Compressor 2 Connector CN332: Blue, Compressor 3 Connector CN333: Black)

1) Prevents liquid accumulation to compressor

Accumulator case heater

(Connector CN334: Red)

1) Prevents liquid accumulation to accumulator

Balance pipe 1) Oil balancing in each outdoor unit

5 Combined Refrigerant Piping System

Schematic Diagrams

5-1. Normal operation (COOL mode / DEFROST mode) -

high outside air temperature (roughly 68 °F (20 °C) or above)

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0724HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Pressure sensor

(high pressure)

Pressure sensor

(low pressure)

Accumulator

4-Way valve

Indoor unit

Note: In DEFROST mode, PMV4 also opens.

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refriger ant

Evaporative gas refrigerant (low-pressure g as)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication line is connected. All other

outdoor units are called "follower units". (The diagram shows a 168 type as an example.)

5-2. Normal operation (COOL mode) - low outside air

temperature (roughly below 68 °F (20 °C))

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0724HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Pressure sensor

(high pressure)

Pressure sensor

(low pressure)

Accumulator

4-Way valve

Indoor unit

Note: With a 096 type or 114 type outdoor unit, the main heat exchanger and subheat

exchanger may be switched over depending on the outside temperature and air conditioning loads.

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refrigerant

Evaporative gas refrigerant (low-pressure gas)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication line is connected. All other

outdoor units are called "follower units" (The diagram shows a 168 type as an example.).

5-3. Normal operation (HEAT mode)

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0724HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Pressure sensor

(high pressure)

Pressure sensor

(low pressure)

Accumulator

4-Way valve

Indoor unit

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refrigerant

Evaporative gas refrigerant (low-pressure gas)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication line is connected. All other

outdoor units are called "follower units" (The diagram shows a 168 type as an example.) .

5-4. Emergency operation (cooling operation under

header outdoor unit backup scenario)

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0964HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Pressure sensor

(high pressure)

Accumulator

4-Way valve

Indoor unit

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refrige rant

Evaporative gas refrigerant (low-pressure ga s)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication li ne is connected.

All other outdoor units are called "follower uni ts".

Leakage from PMV: Liquid-side service valve = Full closure

Set Up as Temporary Header Unit during Emergency Operation

Failure

Pressure sensor (low pressure)

Gas-side service valve = Full closure

Balance pipe packed valve = Full opening

Refrigerant recovery line

(The diagram shows a 192 type as an example.)

Gas pipe

5-5. Emergency operation (heating operation under

header outdoor unit backup scenario)

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0964HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Accumulator

4-Way valve

Indoor unit

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refrigerant

Evaporative gas refrigerant (low-pressure gas)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communicatio n line is connected.

All other outdoor units are called "follower units ".

Failure

Pressure sensor (low pressure)

Gas-side service valve = Full closure

Balance pipe packed valve = Full opening

Refrigerant recovery line

(The diagram shows a 192 type as an example.)

Leakage from PMV: Liquid-side service valve = Full closure

Set Up as Temporary Header Unit during Emergency Operation

Gas pipe

Pressure sensor (high pressure)

5-6. Refrigerant recovery from failed outdoor unit (pump-

down operation under follower outdoor unit backup scenario)

Header unit (MMY-MAP0964HT6UL)

Pressure sensor

(high pressure)

Follower unit (MMY-MAP0724HT6UL)

4-Way valve

Liquid tank

Accumulator

Balance pipe

Liquid pipe

Gas pipe

Liquid pipe

Liquid tank

Accumulator

4-Way valve

Indoor unit

Pressure sensor (low pressure)

High-pressure gas or condensate liquid refrige rant

Evaporative gas refrigerant (low-pressure gas)

Normal refrigerant line

Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication line is connected. All other

outdoor units are called "follower units".

Failure

Pressure sensor (low pressure)

Gas-side service valve = Full openin g ⇒ Full closure 10 minutes after system startup

Balance pipe packed valve = Full opening

(The diagram shows a 168 type as an example.)

Liquid-side service valve = Full closure

Gas pipe

Refrigerant recovery line

Liquid line bypass

Pressure sensor (high pressure)

6 Control Outline

 Outdoor unit

Item Description of operation, numerical data, and other information Remarks

1. Pulse motor valve (PMV) control

1. PMV1, 2 control (PMV1 and 2)

1)During air conditioner operation, the pulse count of a PMV (pulse motor valve) is controlled between 90 and 1000.

2)During cooling, the PMV opening is controlled on the basis of measurements provided by the TL temperature sensor and the Pd pressure sensor (under cool control).

3)During heating, the PMV opening is controlled on the basis of measurements provided by the TS and TD temperature sensors and the PS pressure sensor (super heat control).

4)PMVs are fully closed when the air conditioner is in thermo OFF state or upon being turned off normally or shut down due to an abnormality.

2. PMV4 control (applicable only to MMY-MAP0964HT6UL, MMY-MAP1144HT6UL)

1)When using a small-capacity split-type heat exchanger (mainly a sub-heat exchanger to a combination of a sub-heat exchanger and main heat exchanger) during cooling, the pulse count of the PMV (pulse motor valve) is controlled between 45 and 500. The PMV4 opening is controlled on the basis of measurements provided by the TE1 and TE2 temperature sensors.

2)During heating, the PMV4 may be used as a pressure-relief bypass valve by opening it to a certain degree.

• During heating, PMV control may be provided with PMV1 alone, operated at 45 pulses (minimum), with PMV2 turned off.

Opening of PMV1, 2

Minimum

Maximum

Minimum

Maximum

Opening of PMV4

2. Outdoor fan control

1. Cooling fan control

1)Outdoor fan speed (mode) is controlled on the basis of measurements provided by the Pd pressure sensor.

2)For a specified period after the start of cooling operation, the header outdoor unit controls outdoor fan speed (mode) on the basis of measurements provided by the Pd pressure sensor. Follower units, on the other hand, control outdoor fan speed (mode) on the basis of measurements provided by the TE1 temperature sensor.

* Available control modes are 0 (at rest) to 63.

• The fan speed corresponding to the highest mode varies with the HP capacity of the outdoor unit.

2. Heating fan control

1)Outdoor fan speed (mode) is controlled on the basis of measurements provided by the TE1 temperature sensor.

2)If TE1 > 77°F (25°C) is continuously detected for 8 minutes, the fan may be turned off. However, this condition is the same as normal thermo OFF, so that fan operation will be restarted.

3)For a specified period after air conditioner startup and during defrosting, this control is disabled.

4)When refrigerant is in extremely short supply, this control may cause the air conditioner to be repeatedly turned on and off.

• The fan speed corresponding to the highest mode varies with the HP capacity of the outdoor unit.

3. Control while follower unit at rest The fan is operated at mode 1 to prevent the accumulation of refrigerant inside the outdoor heat exchanger.

3. Capacity control

1)The compressors of the header and follower units are controlled on the basis of

capacity demand issued by indoor controllers.

2)The two or three compressors featured in an outdoor unit operate on a rotational

basis, so that, every time they come to a stop, their order of startup changes.

3)Where two or more follower units are connected, every time the system goes

thermo OFF or all the compressors featured in the follower units come to a stop, the priority startup order of the follower units changes, as they are also subject to rotational operation.

Item Description of operation, numerical data, and other information Remarks

pressure

[Highest mode]

[Current mode + 1] (Mode raised as rapidly as every second)

[Current mode + 1]/50 seconds

[Hold]

[Current mode + 1]/75 seconds (Mode raised up to 13)

(Mode 1 to highest)

Mode being raised: mode 0 → 1

[Current mode - 1]/50 seconds Mode being lowered: Highest mode - 1 → 1

Interval control [Mode [0]: 180 seconds Mode [1]: 30 seconds]

[Current mode - 1] (Mode lowered as rapidly as every two seconds) (down to mode 0)

TE1 temperature

°F (°C)

Zone A: Lowest mode, timer count for forced compressor shutdown

Zone B: -2/15 seconds (down to lowest mode)

Zone C: -1/15 seconds (down to lowest mode)

Zone D: Hold (staying at current mode)

Zone E: +1/15 seconds (up to highest mode)

Zone F: Highest mode

4. Oil level detection control

1)Judgment as to whether an optimum amount of oil is present in the compressor

cases is made on the basis of the temperature readings of sensors TK1 to TK5. This control function is performed by the header unit and each follower unit individually.

2)In concrete terms, judgment is based on the relationship between the temperature

measurements provided by TK1, TK2 or TK3, on the one hand, and those provided by TK4 or TK5, on the other. If there is depletion, oil equalization control takes over.

3)This control function is performed whenever at least one compressor is in

operation.

• Oil level detection takes place regardless of the number of compressors, whether it be one, two or three.

• Rough guide for oil level judgment

1) If TK1 - TK4 57.2 °F (14 °C), oil level of compressor 1 is optimum.

2) If TK2 - TK4 57.2 °F (14 °C), oil level of compressor 2 is optimum.

3) If TK3 - TK4 57.2 °F (14 °C), oil level of compressor 3 is optimum.

Item Description of operation, numerical data, and other information Remarks

Oil separator

High pressure SW

High

pressure

High pressure SW

Oil separator

Check valve

Balance pipe Packed valve

5. Oil equation control

This control function is aimed at preventing compressors from running out of oil by evening out the oil supply to outdoor units, and is basically performed by opening/ closing solenoid valves SV3A, SV3B, SV3C, SV3D, and SV3F. There are three control patterns as described below. (For a schematic diagram of oil equalization control, see page 47.)

1. Preparatory control If the oil level judgment result in the memory continues to be “low” for 30 seconds, SV3B is turned on, with SV3D turned on and off intermittently.

• Oil accumulated in the oil separator is returned to the compressor.

2. Oil equation control This control function is performed to transfer oil to the outdoor unit whose oil level is low from other outdoor units. It takes place whenever the header unit registers a low oil level result while at least one of its compressors is turned on or at least one of the follower units issues an oil level equation request. This control function does not apply to a header unit-only system (no follower units connected).

• This is normal oil equalization control.

3. Oil depletion protection control This control function is performed if oil equation control fails to achieve an optimum oil level. In concrete terms, if a low oil level situation continues for 30 minutes, the unit is brought to a protective shutdown, followed by a restart 2 minutes and 30 seconds later. If protective shutdown is repeated three times, the error is confirmed as final. (There will be no more restarts.) The error code is “H07”.

• This protective control is performed when a prolonged low oil level is detected.

6. Refrigerant/ oil recovery control

1. Cooling oil (refrigerant) recovery control Performed during cooling, this control function aims to: periodically collect any refrigerating oil condensate that has built up in inter-unit gas pipes and indoor units and return it to outdoor units when the compressor operation command is inadequate; and prevent the accumulation of refrigerant in outdoor heat exchangers while cooling operation is in progress under low outside air temperature conditions. It is managed by the header outdoor unit.

1)Control commencement conditions

• When cooling operation has continued for at least 2 hours

• When cooling operation has started (compressors have just been turned on, though this does not always happen depending on outside air temperature conditions).

2)Control details

• All compressors currently in operation are operated at the minimum speed, with those currently not in operation turned on.

• Indoor units are set to the cooling oil (refrigerant) recovery control mode, with their indoor PMVs opened to a certain degree.

• Compressors are operated at the target speed.

• After recovery control is performed for a specified period of time, it is terminated, and normal cooling operation resumes.

• Cooling oil recovery control takes place approximately every 2 hours.

• Control duration is about 2 to 5 minutes, though it varies according to the operating conditions of the system.

2. Heating refrigerant (oil) recovery control Performed during heating, this control function aims to recover any liquid refrigerant trapped inside indoor units that have been turned off. It also serves the additional purposes of recovering indoor/outdoor refrigerant after defrosting and recovering oil present in outdoor heat exchangers during heating overload operation. This control function is managed by the header outdoor unit.

1)Control commencement conditions

• When heating operation has started (compressors have just been turned on)

• When heating takes over upon completion of defrosting

• When heating operation has continued for 60 minutes

2)Control details

• All compressors currently in operation are operated at the minimum speed, with those currently not in operation turned on.

• Indoor units are set to the heating refrigerant (oil) recovery control mode, with their indoor PMVs opened to a certain degree.

• Compressors are operated at the target speed.

• Upon completion of refrigerant recovery for all the indoor units, normal cooling operation resumes.

• Heating oil recovery control takes place approximately every hour.

• Control duration is about 2 to 10 minutes, though it varies according to loading conditions.

• Compressor rotational speed varies with control conditions, indoor unit capacity, and outdoor unit specification.

Item Description of operation, numerical data, and other information Remarks

7. Defrosting control (reverse defrosting method)

1. Defrosting commencement conditions

• During heating operation, the cumulative duration of operation in which TE1 sensor temperature falls below frost formation temperature is measured, and when this reaches 55 minutes, defrosting control is introduced. (Just after startup or upon changeover from cooling to heating, the target cumulative duration is 25 minutes.)

* If the outdoor units are a combination of different models, all the units begin engaging

in defrosting control as soon as one of them satisfies defrosting commencement conditions.

• Frost formation temperature is 29.3 °F (-1.5 °C).

• If the outdoor units are a combination of different models, defrosting operation, once started, cannot be manually terminated for about 2 minutes.

2. Details of defrosting control

1)All compressors currently in operation are operated at the minimum speed.

2)When a specified amount of time passes from the time the compressors reached the minimum speed, the outdoor fans are turned off by closing the 4-way valves.

3)All compressors currently not in operation are turned on and operated at the target rotational speed for defrosting control.

• To protect the refrigerating cycle circuit, the fan mode may be controlled during defrosting.

3. Defrosting termination conditions

• Defrosting termination conditions are met when the TE1 temperature sensor measurement reaches a specified value (roughly 53.6 °F (12 °C)) a certain period of time after the commencement of defrosting control. In that event, defrosting termination control takes over.

* If the outdoor units are a combination of different models, defrosting termination

control commences when all the units satisfy the defrosting termination conditions. As long as one or more outdoor units are yet to satisfy the defrosting termination conditions, those that have engage in standby operation.

• During defrosting control, compressors are controlled so that their speeds do not exceed 76.6 rps.

4. Details of defrosting termination control

1)Compressors are operated at the standby operation speed.

2)When a specified amount of time passes, the 4-way valves are opened.

3)Indoor heating refrigerant recovery control is performed. For control details, see “ 6. Refrigerant/oil recovery control”.

• During standby operation, compressor speed is in the 24-33.5 rps range. (It varies from outdoor unit to outdoor unit.)

Item Description of operation, numerical data, and other information Remarks

8. Release valve control

1. SV2 gas balance control This control function is aimed at achieving gas balance by opening SV2 while compressors are turned off so as to reduce their startup load the next time they are turned on. It is individually performed by the header outdoor unit and each follower outdoor unit.

1)Control conditions

• In cooling, compressors have been turned off.

• In heating, the header unit has been shut down.

2)Control details

• The control point is changed according to ΔP (Pd pressure - Ps pressure) registered

just before the compressors were turned off.

• When ΔP P1, SV2 is opened. When this results in ΔP < P2, SV2 is closed.

• When ΔP < P1, SV2 is closed.

2. SV2 high pressure release control This control function is aimed at mitigating pressure rise while a compressor is in operation at low speeds.

1)Control conditions

• Heating operation is in progress (except periods of defrosting control).

• A lone compressor from the header unit is in operation at low speeds of up to 36 rps.

2)Control details

• When Pd pressure becomes 493 psi (3.4 MPa), SV2 is opened.

• When Pd pressure becomes 406 psi (2.8 MPa), SV2 is closed.

3)Termination conditions

• Shutdown, thermo OFF, defrosting operation, or cooling operation.

• The number of header unit compressors in operation increases to two or more.

• At least one follower unit compressor is turned on.

• The speed of the compressor rises to 40 rps or more.

3. SV2 low pressure release control This control function is aimed at preventing a rapid fall in pressure during transient operation. It is individually performed by the header outdoor unit and each follower outdoor unit. The control is always provided except during periods of stoppage or thermo OFF.

1)Control details

• When Ps pressure becomes 23.2 psi (0.16 MPa), SV2 is opened.

• When Ps pressure becomes > 29 psi (0.20 MPa), SV2 is closed.

Item Description of operation, numerical data, and other information Remarks

(Unit: psi (MPa))

Control points

for Pd

pressure

P1, P2

Heating Cooling

Header unit compressors Header unit compressors Header unit compressors

OFF OFF ON

P1 P2 P1 P2 P1 P2

Header unit 188.5 (1.3) 159.5 (1.1) 188.5 (1.3) 159.5 (1.1) — —

Follower unit 188.5 (1.3) 159.5 (1.1) 188.5 (1.3) 159.5 (1.1) 72.5 (0.5) 58.0 (0.4)

8. Release valve control (cont’d)

4. SV41, 42, 43 low pressure release control This control function is aimed at providing low pressure protection, and is individually performed by the header unit and each follower unit. The control takes place during defrost operation, heating startup pattern control operation, and cooling operation.

1)Control details (heating)

When Ps pressure becomes 14.5 psi (0.1 MPa), SV41, 42 and 43 are opened; when Ps pressure becomes 21.8 psi (0.15 MPa), SV41, 42 and 43 are closed.

2)Control details (cooling)

When Ps pressure and Pd pressure become 20.3 psi (0.14 MPa) and 261 psi (1.8 MPa), respectively, SV41 and 42 are opened; when Ps pressure and Pd pressure become 27.6 psi (0.19 MPa) and 319 psi (2.2 MPa), respectively, SV41 and 42 are closed.

5. SV5 high pressure release control This control function is aimed at mitigating pressure rise and is only performed by the header unit.

1)Control details (heating)

When Pd pressure and compressor speed become 493 psi (3.4 MPa) and 38 rps, respectively, during heating, with a single compressor in operation, SV5 is opened; when Pd pressure becomes 391.5 psi (2.7 MPa), or compressor speed

64 rps, SV5 is closed.

9. High pressure release compressor shutdown control

This control function is aimed at automatically shutting down a compressor in an outdoor unit depending on Pd pressure. It is individually performed by the header unit and each follower unit.

1)Control details

• Compressors are shut down when Pd pressure reaches or exceeds P0.

• The compressor restart prevention timer (2 minutes 30 seconds) is set, and the control terminated.

• When Pd P0 = 500.3 psi (3.45 MPa), compressor No. 2 or No. 3 (the last one of three compressors in terms of startup order in a three compressor configuration) is shut down.

• When Pd P0 = 507.5 psi (3.5 MPa), compressor No. 1 (the first compressor in terms of startup order) is shut down.

10. Case heater control

There are two types of case heaters: a compressor case heater and an accumulator case heater. This control function is aimed at preventing the accumulation of refrigerant in those cases, and is performed by all outdoor units. If the power supply has not been turned on for a specified period before a postinstallation test run, compressor failure may occur. Similarly, when starting compressors after a long period of no power supply, it is recommended that the power supply be turned on for a while before operation is resumed, just like a post-installation test run. This control function is sometimes used alongside an electrical charging of the compressor motor windings. In this case, a charging sound may be heard, but this is normal.

1)Control details

• The heaters are turned on while the compressors are turned off.

• The heaters are turned off when T0 sensor temperature becomes 82.4 °F (28 °C), and are turned back on when T0 sensor temperature becomes 77 °F (25 °C).

• When the compressors are turned on, the heaters are kept on for 10 minutes.

Item Description of operation, numerical data, and other information Remarks

11. A3-IPDU control

IPDU controls inverter compressors by issuing commands relating to compressor speeds, speed increases/decreases, and current release control values via the interface P.C. board. The main control functions of the IPDU P.C. board are described below.

1. Current release control To prevent inverter input current from exceeding the specified value, output frequency is controlled with AC input current as detected by T02 mounted on the control P.C. board.

Current control values for various outdoor units are shown below.

2. Heat sink temperature detection control

1)This control function is aimed at protecting IGBT from overheating via a thermistor

(TH sensor) mounted in the compressor drive module (Q201) of A3-IPDU.

2)When TH 185 °F (85 °C) is detected, the fan operation mode is raised by one

step, followed by a series of additional step-ups right up to the highest mode at a rate of one step/5 seconds.

3)After step 2), the normal fan mode is restored when TH falls to < 185 °F (85 °C).

4)When TH 221 °F (105 °C), compressors are shut down.

5)Compressors are restarted 2 minutes and 30 seconds later, with an error count of

1 recorded. If this is repeated four times (error count reaches 4), the error is confirmed as final. The error [P07] is displayed. (There will be no more restarts.)

* Possible causes of the confirmed error include a heat buildup in the outdoor unit, fan

abnormality, blockage of the cooling duct, and IPDU P.C. board fault.

* The TH temperature used in this control function is the highest registered by A3-

IPDU1, A3-IPDU2, and A3-IPDU3.

3. Overcurrent protection control

1)When the overcurrent protection circuit on an IPDU P.C. board detects an

abnormal current, the compressor is shut down.

2)The compressor is restarted 2 minutes and 30 seconds later, with an error count

of 1 recorded. If the compressor successfully operates for at least 10 minutes after a restart, the error count is cleared.

3)If the error count reaches 8, the error is confirmed as final.

• A3-IPDU1, 2 and 3 are each provided with a TH sensor.

4. High pressure SW control

1)When the high pressure SW of an inverter compressor is activated, the compressor is shut down with an error count of 1 recorded.

2)The compressor is restarted 2 minutes 30 seconds later, and, if it successfully operates for at least 10 minutes, the error count is cleared.

3)If the error count reaches 4, the error is confirmed as final. The error “P04” is displayed.

• Connected to A3-IPDU, the high-pressure SW is normally closed.

Item Description of operation, numerical data, and other information Remarks

Zone A:Compressors are operated normally. Zone D:The current operating frequency is maintained. Zone B:Operating frequency is lowered. Zone C:The lowering of operating frequency is halted

to maintain the current frequency.

Zone B

Zone D

Zone A

Zone C

Current

Outdoor unit capacity type

I1 I2

114 6.2 5.7

096 5.9 5.4

072 6.4 5.9

1 Cooling operation under low outside temperature conditions

1) If pressure falls to extremely low levels, indoor units may be shut down via freeze prevention control based on the indoor TC sensor.

2) If pressure falls to extremely low levels, frequency may be reduced via cooling capacity control.

3) When the discharge temperature sensor reading falls below 140 °F (60 °C), the frequency may be increased above the level called for by the command received from the indoor unit.

2 PMV (Pulse Motor Valve)

1) When the power is turned on, PMVs generate a tapping sound as they are initialized. If this sound is not heard, there is a possibility of faulty PMV operation. However, in a noisy environment, it may simply be drowned out by ambient noise.

2) Do not separate the actuator (head section) from any PMV during operation. It may result in an inaccurate opening.

3) When transporting (relocating) the set, do not, under any circumstances, keep the actuator separated. It may damage the valve by causing it to close and exposing it to pressure from sealed liquid.

4) When reattaching the actuator after its removal, push it in firmly until a click sound is heard. Then, turn the power off and back on again.

Unit receiving oil

Unit transferring oil

Header unit (MMY-MAP0964HT6UL)

High pressure sensor

4-way valve

Low pressure sensor

Accumulator

Liquid tank

Balance pipe

Liquid pipe

Gas pipe

Follower unit (MMY-MAP0724HT6UL)

4-way valve

High pressure sensor

Low pressure sensor

Accumulator

Liquid tank

7 Applied Control and Functions

7-1. Applied control for outdoor unit

The outdoor fan high static pressure support and priority operation mode setting (cooling / heating / number of units / or priority indoor unit) functions are made available by setting relevant switches provided on the interface P.C. board of the outdoor unit.

7-1-1. Outdoor fan high static pressure shift

Purpose / characteristics

This function is used when connecting a duct to the discharge port of an outdoor unit (as part of, for example, unit installation on the floor by floor installation.)

Setup

Turn ON the DIP switch [SW10, Bit 2] provided on the interface P.C. board of the outdoor unit. This function must be enabled with every discharge duct connected outdoor unit for both of the header and follower units.

Specification

Increase the speed of the propeller fan units on the outdoor fan to allow the installation of a duct with a maximum external static pressure not greater than specified in the table below. If a discharge duct with a resistance greater than 0.06 InWG (15 Pa) is to be used, enable this function. The maximum external static pressures of base units are shown below (Table 1).

Table 1: Maximum External Static Pressures of Base Outdoor Units

(*) Calculate duct resistance from outdoor unit air flow.

7-1-2. Priority operation mode setting

Purpose / characteristics

This function allows switching between priority cooling and priority heating. Four patterns of priority operation mode setting are available as shown in the table below. Select a suitable priority mode according to the needs of the customer.

Setup

CAUTION

In the case of the priority indoor unit mode, it is necessary to set up the specific indoor unit chosen for priority operation (a single unit only).

(1) Outdoor unit setup method (header unit)

Model MMY- MAP0724HT6UL MAP0964HT6UL MAP1144HT6UL

Maximum external static pressure 0.2 InGW (50 Pa) 0.2 InGW (50 Pa) 0.2 InGW (50 Pa)

(*) Outdoor unit air flow (CFM) 5800 6600 7060

SW11

Operation

Bit 1 Bit 2

OFF OFF Priority heating (factory default)

ON OFF Priority cooling

OFF ON

Priority operation based on No. of units in operation (priority given to the operation mode with the largest share of units in operation)

ON ON

Priority indoor unit (priority given to the operation mode of the specific indoor unit set up for priority operation)

(2) Indoor unit setup method for priority indoor unit mode

The setting can be changed only when the system is at rest. (Be sure to turn off the system prior to this operation.)

1 Push the + + buttons simultaneously and hold for at

least 4 seconds. The display window will start flashing in a little while.

Verify that the displayed CODE No. is 10.

• If the displayed CODE No. is not 10, press the button to erase the

display and repeat the procedure from the beginning.

(Note that the system does not respond to remote control operation for about 1 minute after the button is pushed.) (In the case of group control, the indoor unit No. displayed first indicates the header unit.)

2 Each time the button is pushed, one of the indoor

unit Nos. under group control is displayed in turn. Select the indoor unit whose setting is to be changed.

The fan and louver of the selected indoor unit then come on, so that the position of this unit can be confirmed.

3 Use the button to select the CODE No. 04. 4 Use the button to select the SET DATA 0001.

Priority set 0001 No priority set 0000

5 Push the button.

The setup is finished when the display changes from flashing to steady.

6 Upon finishing the setup, push the button. (This

finalizes the setting.)

When the button is pushed, the display goes blank, and the system returns to normal off state. (Note that the system does not respond to remote control operation for about 1 minute after the button is pushed.)

NOTE

Priority can be given to only one indoor unit. If more than one indoor unit is accidentally set to priority, an error code (L5 or L6: Duplicated indoor unit priority setting) will be displayed. All units displaying L5 have been set to 0001 (priority). Keep the unit to which priority should be given as it is, and change the value back to 0000 (no priority) for all the rest.

Error code Description

Duplicated indoor unit priority setting (The unit is set to 0001.)

Duplicated indoor unit priority setting (The unit is set to 0000.)

7-2. Applied control of outdoor unit

Optional control P.C. boards provide access to a range of functions as listed below.

Layout of Outdoor Unit Interface P.C. Board

* DIP switch settings and jumper wire statuses vary from function to function.

No. Function

Outdoor unit

for control P.C. board connection

Control P.C. board to be used Outdoor unit interface P.C. board setting*

PCDM4UL PCMO4UL PCIN4UL Connector No. DIP SW No. Bit

Jumper to be

removed

Power peak-cut Control (Standard) Header unit ✓ – – CN513(blue) SW07 1 –

Power peak-cut Control (For one input function)

Header unit ✓ – – CN513(blue) SW07 1 J16

Power peak-cut Control (Enhanced Functions)

Header unit ✓ – – CN513(blue) SW07 1.2 –

3 Snowfall Fan Control Header unit – ✓ – CN509(black) – – –

4 External master ON / OFF Control Header unit – ✓ – CN512(blue) – – –

Night operation (sound reduction) Control

Header unit – ✓ – CN508(red) – – –

Operation Mode Selection Control Header unit – ✓ – CN510(white) – – –

Operation Mode Selection Control (forced choice)

Header unit – ✓ – CN510(white) – – J01

7 Error / Operation output Header unit – – ✓ CN511(green) – – –

8 Compressor Operation Output

Individual

outdoor unit

––✓ CN514(green) – – –

9 Operating Rate Output Header unit – – ✓ CN514(green) SW16 1 –

Connector layout

Jumper wire layout

DIP switch layout

Interface P.C. Board

7-2-1. Power peak-cut control (standard)

Operation

An external power peak-cut control signal limits the peak capacity of the outdoor unit. L1: Power peak-cut control indication lamp SW1: Power peak-cut control ON switch (ON as long as target power peak-cut control has been reached or exceeded, normally OFF)*1 SW2: Power peak-cut control OFF switch (OFF as long as target power peak-cut control has not been reached or exceeded, normally ON)*1

*1 The inputs of SW1 and SW2 can be either pulse (100 msec or wider) or step signals.

Do not turn on SW1 and SW2 simultaneously.

* Be sure to provide a contact for each terminal.

Power peak-cut control settings

Two-core cable support

SMMS-i models allows ON/OFF power peak-cut control to be implemented using a power peak-cut control ON input (SW1) alone, provided that the J16 jumper wire on the interface P.C. board of the header outdoor unit has been removed.

Power peak-cut control P.C.

board

SW1 SW2 L1

Interface P.C. board of header outdoor unit

SW07 Bit 1 OFF SW07 Bit 1 ON

Power peak-cut control ON signal received

ON OFF ON 0% (forced stop) 60% capacity (upper limit regulated)

Power peak-cut control OFF signal received

OFF ON OFF 100% (normal operation) 100% (normal operation)

Header outdoor unit

L1: Display lamp suring power peak cut cont rol

Locally procured

Outdoor unit interface PCB

Connection cable

Shield wire

Display relay

Optional PCB

[OPERATION]

Power supply

For SW1 and SW2, be sure to provide novoltage contacts for each terminal. The input signals of SW1 and SW2 may be pulse input (100 msec or more) or continuous make.

Header outdoor unit

L1: Display lamp suring power peak cut control

Locally procured

Outdoor unit interface PCB

Connection cable

Shield wire

Display relay

Optional PCB

[OPERATION]

Power supply

Power peak-cut control is enabled as long as SW1, as shown on the wiring diagram, is ON (continuously).

Note 1: Specifications of display relay contact

• The terminal for display output ([Operation] terminal) must satisfy the following electrical rating.

When connecting a conductive load (e.g. relay coil) to the display relay load, insert a surge killer CR (for an AC power supply) or a diode for preventing back electromotive force (for a DC power supply) on the bypass circuit. The optional P.C. board should be connected to the header outdoor unit (U1).

7-2-2. Power peak-cut control (extended)

Operation

An external power peak-cut control signal limits the peak capacity of the outdoor unit. L1: Power peak-cut control indication lamp SW1: Power peak-cut control ON switch*1 SW2: Power peak-cut control OFF switch*1

*1 The inputs of SW1 and SW2 can be either pulse (100 msec or wider) or step signals.

* Be sure to provide a contact for each terminal.

Extended power peak-cut control settings

Specifications of display relay contact

Note 1: Specifications of display relay contact

• The terminal for display output ([Operation] terminal) must satisfy the following electrical rating.

Jumper wire

J16

Input

SW1

SW07 Bit 1 Indicator relay

Bit 1 OFF Bit 1 ON (L1)

Cut

ON 0% (forced stop) 60% capacity (upper limit regulated) OFF

OFF 100% (normal operation) 100% (normal operation) ON

<Electrical Rating> 24 V or less (AC / DC), 10 mA or more, 1 A or less (non-conductive load)

Indication lamp

External power peak-cut control

signals

Peak capacity

I/F SW07 Bit 1

L1 SW1 SW2 OFF ON

OFF OFF OFF 100% (normal operation) 100% (normal operation)

ON ON OFF 80% (upper limit regulated) 85% (upper limit regulated)

ON OFF ON 60% (upper limit regulated) 75% (upper limit regulated)

ON ON ON 0% (forced stop) 60% (upper limit regulated)

<Electrical Rating> 24 V or less (AC / DC), 10 mA or more, 1 A or less (non-conductive load)

Header outdoor unit

L1: Display lamp suring power peak cut control

Locally procured

Outdoor unit interface PCB

Connection cable

Shield wire

Display relay

Optional PCB

[OPERATION]

Power supply

For SW1 and SW2, be sure to provide no-voltage contacts for each terminal.

7-2-3. Snowfall fan control

Operation

An external snowfall signal turns on the outdoor unit fan.

The input signal is recognized during its rising/falling phase. (After reaching the top/bottom of the rising/falling edge, the signal must remain there for at least 100 ms.) The optional P.C. board should be connected to the header outdoor unit (U1).

7-2-4. External master ON/OFF control

Operation

The system is started/stopped from the outdoor unit.

The input signal is recognized during its falling phase. (After reaching the bottom of the falling edge, the signal must remain there for at least 100 ms.)

CAUTION

(1) Do not turn on the COOL (SW1) and HEAT (SW2) terminals simultaneously. (2) Be sure to provide a contact for each terminal.

External signal: No-voltage pulse contact

The optional P.C. board should be connected to the header outdoor unit (U1).

Terminal Input signal Operation

COOL (SW1)

Snowfall fan control (Turns on outdoor unit fan)

Normal operation (Cancels control)

Terminal Input signal Operation

COOL (SW1)

Turns on all indoor units

HEAT

(SW2)

Turns off all indoor units

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

Connection cable

Snowfall senior

SW1: Snowfall detection switch (snowfall sensor)

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

Connection cable

SW1: Operation input switch SW2: Stop input switch)

7-2-5. Night operation (sound reduction) control

Operation

This function decreases noise at night or other times as necessary.

The system's capacity is reduced during low-noise operation. The table below provides a rough guide to this capacity reduction.

* Position of noise measuring device: 3.3 ft (1 m) from the front face of the set and 4.9 ft (1.5 m) above ground

(anechoic sound)

Terminal Input signal Operation

COOL (SW1)

Night time control

Normal operation

Outdoor unit

(base unit)

During low-noise mode*

dB(A)

Capacity

Relative to maximum capacity

Cooling Heating

Model 072 type 50 approx. 85% approx. 80%

Model 096 type 53 approx. 85% approx. 85%

Model 114 type 53 approx. 80% approx. 80%

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

Connection cable

SW1: Night time signal switch

7-2-6. Operation mode selection control

NOTE

SW1: COOL mode selection switch SW2: HEAT mode selection switch

*The display “ (Operation mode selection control in progress)” appears on the remote control.

Indoor unit operation intervention function

The statuses of indoor units operating in a mode different from the selected operation mode can be changed by changing the status of a jumper wire (J01) provided on the interface P.C. board of the header outdoor unit.

The optional P.C. board should be connected to the header outdoor unit (U1).

Input signal

Operation Remarks

COOL (SW1) HEAT (SW2)

ON OFF

Only cooling

operation allowed

OFF ON

Only heating

operation allowed

OFF OFF Normal operation

Jumper wire Description of intervention

J01 connected

(factory default)

All indoor units operating in a mode different from the selected operation mode (prohibited-mode indoor units) become non-priority units (thermostat OFF). Prohibited-mode indoor units

J01 cut

The selected operation mode is imposed on all indoor units operating in a different mode.

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

Connection cable

SW1: Cooling mode specified input switch SW2: Heating mode specified input switch

Operation mode Operation status

Remote control

display

COOL Fan operation at air flow rate set via remote control “ ” operation ready

HEAT Fan operation at extremely low air flow rate

FAN

Fan operation at air flow rate set via remote control as normal

Mode selected at P.C. board Remote control operation / display

Normal

All modes (COOL, DRY, HEAT and FAN) available

COOL Only COOL, DRY and FAN available “ operation mode control”

(turned on during remote controller operation)

HEAT

Only HEAT and FAN available

7-2-7. Error/operation output

Operation

In-operation output: An in-operation indication signal is output as long as at least one indoor unit is in operation in the line. Error output: An error indication signal is output if an error occurs in at least one indoor/outdoor unit in the line.

Note 1: Output Relay (K1, K2, K3) Contact Specifications

• Output terminals (OUTPUT1, 2, 3) must satisfy the following electrical rating.

• When connecting a conductive load (e.g. relay coil) to loads K1, K2 and K3, insert a surge killer CR (for an AC power supply) or a diode for preventing back electromotive force (for a DC power supply) on the bypass circuit.

The optional P.C. board should be connected to the header outdoor unit (U1).

<Electrical Rating> 24 V or less (AC / DC), 10 mA or more, 1 A or less (non-conductive load)

C1 Connector cable 1

CN511 Connector on Interface side (green)

K1,K2 Relays

L1 Error indication Lamp

L2 Operation indication Lamp

OUTPUT1 Error output

OUTPUT2 Operation output

PJ20 Connector on optional PCB side

TB1 Terminal block

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

(See “NOTE”)

7-2-8. Compressor operation output

Operation

When a compressor is in operation, a relay connected to the output terminal assigned to it is turned on (closed). When it is at rest, the relay is turned off (open). The output terminals are named OUTPUT1, OUTPUT2 and OUTPUT3 from left to right when facing the front of the outdoor unit, as shown in the diagram.

Note 1: Output Relay (K1, K2, K3) Contact Specifications

• Output terminals (OUTPUT1, 2, 3) must satisfy the following electrical rating.

<Electrical Rating> 24 V or less (AC / DC), 10 mA or more, 1 A or less (non-conductive load)

Connection cable 2

CN514

Interface-side connector (green)

CTR1

Elapsed operation counter 1

CTR2

Elapsed operation counter 2

CTR3

Elapsed operation counter 3

K1,K2,K3

Relay

L1,L2,L3

Operation indication lamp

OUTPUT1

Compressor 1 in-operation output terminal

OUTPUT2

Compressor 2 in-operation output terminal

OUTPUT3

Compressor 3 in-operation output terminal

PJ20

Optional P.C. board-side connector

Power supply unit

TB1

Terminal block

Outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

(See “NOTE”)

Model featuring three compressors

Model featuring two compressors

7-2-9. Operating rate output

Operation

At the output terminals, a signal is present (relay closed) or absent (relay open) in various combinations according to the system operation factor, as shown in the diagram. The operation rate (FA) is the percentage ratio of the current output of the system to the maximum output (100%).

off = Relay open on = Relay closed

* Connect the optional P.C. board to the header outdoor unit.

Note 1: Output Relay (K1, K2, K3) Contact Specifications

• Output terminals (OUTPUT1, 2, 3) must satisfy the following electrical rating.

Function SW16 OUTPUT1 OUTPUT2 OUTPUT3 Operation factor (FA)

System operation rate output

Bit 1: ON Bit 2: OFF

off off off FA=0%

on off off

0%<FA<20%

off on off 20% FA<35%

on on off 35% FA<50%

off off on 50% FA<65%

on off on 65% FA<80%

off on on 80% FA<95%

on on on 95% FA

Connection cable 2

CN514

Interface-side connector (green)

MONITOR

Monitoring device

OUTPUT1

Output terminal for each function

OUTPUT2

Output terminal for each function

OUTPUT3

Output terminal for each function

PJ20

Connector on optional PCB side

TB1

Terminal block

<Electrical Rating> 24 V or less (AC / DC), 10 mA or more, 1 A or less (non-conductive load)

Header outdoor unit

Locally procured

Outdoor unit interface PCB

Shield wire

Optional PCB

(See “NOTE”)

MONITOR

8 Test Operation

8-1. Procedure and summary of test operation

A test operation is executed with the following procedure. When problems or an error occurs at any step, remove the causes of the problem or error referring to “9 Troubleshooting.”

Checks before test operation

Check that the main power supply is turned on.

Set up the addresses.

Test operation

END

Check basic items, mainly the installation work. Be sure to enter the check results in checklist 1 and 2.

This check is done after the power has been turned on. Check that the refrigerant circuit system is turned on normally.

Start the address setup in the outdoor/indoor units. Note: Operation does not start simply by powering-on.

Carry out a test operation. Check air blowing and cooling/heating operation in the indoor unit.

8-2. Check items before test operation (before powering-

on)

Prior to the test operation, check the following items to verify there are no problems with the installation work.

(1) In the case that a central control system is not connected:

NOTE

The figure above does not show all the electric wires. For details, refer to the installation manuals for the outdoor unit, indoor unit, remote control, or optional devices.

Main check items Check

(1)Are the indoor and outdoor communication lines of the header unit connected to the U1/U2 terminals?

(2)Is the relay connector between the U1/U2 terminal and the U3/U4 terminal removed? (Set up factory

default)

(3)Is the communication line between outdoor units connected to the U5/U6 terminal?

(4)Is the terminal resistance (SW30-bit 2) on the interface PC board of the header unit turned on? (Set

up factory default)

(5)Is the end terminal of the shield wire open?

(6)Is the end terminal of the shield wire earthed at the header unit side?

Outdoor unit

Indoor unit

Header unit (A)

Follower unit (B)

Remote control

(2) In the case that a central control system is connected (before address setup)

NOTE

The figure above does not show all the electric wires. For details, refer to the installation manuals for the outdoor unit, indoor unit, remote control, or optional devices.

Main check items Check

(1)Are the indoor and outdoor communication lines of the header unit connected to the U1/U2 terminals?

(2)Is the relay connector between the U1/U2 terminal and the U3/U4 terminal removed? (Set up factory

default) (Keep the relay connector disconnected before address setup.)

(3)Is the communication line between outdoor units connected to the U5/U6 terminal?

(4)Is the communication line of the central control system connected to the header unit U3/U4 terminals

of each refrigerant line? (The communication line of the central control system may be connected to the communication lines of the indoor/outdoor communication lines.)

(5)Is the terminal resistance (SW30-bit 2) on the interface PC board of the header unit turned on? (Set

up factory default) * After address setup and test operation check, turn on the SW30-bit 2 of the header unit for the

smallest line address, and turn off SW30-bit 2 of the header unit for other refrigerant lines. (See “84-3. Address setup procedure”)

(6)Is the end terminal of the shield wire open?

(7)Is the end terminal of the shield wire earthed at the header unit side?

(8)When the refrigerant line and the central control system of the SDI series are connected:

➝ Are “1:1 model” Connection Interface (TCB-PCNT31TLUL) correctly connected? ➝ When the SDI series operates with group, twin, or triple operation, are the interfaces connected to

the header unit of the indoor unit?

Outdoor unit

Indoor unit

Header unit (A)

Follower unit (B)

Remote control

To other refrigerant line

Other refrigerant line

To indoor unit

Central remote control

Checklist 1

• Using Checklist 1, check that there are no problems with the installation work.

Is the capacity of the circuit breaker (Earth leakage breaker) appropriate?

Outdoor total capacity A Header unit (A) A Indoor unit A

Follower unit (B) A

Is the gauge of the power cable correct?

Header unit (A) AWG Indoor unit AWG

Follower unit (B) AWG

Is the control communication line correct?

Indoor-outdoor connection terminals (U1, U2)

Outdoor-outdoor connection terminals (U5, U6)

Central control system connection terminals (U3, U4)

Is the power of indoor units supplied collectively?

Is it grounded to earth? Is the resistance sufficient? (10 MΩ or higher) MΩ or higher

Is the main power voltage sufficient? (within 460 V ±10%) V

Is the diameter of connecting pipe correct?

Is the branch kit correct?

Is the water drain of the indoor unit arranged so that it flows without accumulation?

Is the heat insulation of pipes sufficient? (connecting pipes, branch kit)

Is there no short circuit of discharge air in the indoor / outdoor units?

After an airtightness test of the pipes, are vacuuming and adding of refrigerant executed?

Are the valves of all the outdoor units fully opened?

Gas side Liquid side Balance side

Header unit (A)

Follower unit (B)

Checklist 2

Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diameter on the liquid side, the pipe length to be connected, and the corrective amount of refrigerant (C) according to system horsepower.

First, enter the total length for each liquid pipe diameter in the following table, and then calculate the additional amount of refrigerant by pipe length.

<(A) : Additional amount of refrigerant by pipe length>

Next, refer to the following table for the Adjustment amount of refrigerant according to system capacity (B).

<(B) : Adjustment amount of refrigerant according to system capacity>

Lastly, add the additional amount of refrigerant by pipe length (A) to the Adjustment amount of refrigerant according to system capacity(B). This is the final additional amount of refrigerant.

Pipe diameter on

the liquid side

Additional

refrigerant amount /

1ft

(lb)

Total pipe length on each liquid

side

(ft)

Additional amount of refrigerant

pipe diameter on each liquid side

(lb)

Ø1/4” 0.017 × = Ø3/8” 0.037 × = Ø1/2” 0.071 × = Ø5/8” 0.108 × = Ø3/4” 0.168 × =

Additional amount of refrigerant by pipe length

total

Outdoor unit

capacity type

Adjustment amount

of refrigerant

(lb)

Combined outdoor units

072 type 3.31 072 type – 096 type 13.23 096 type – 114 type 15.43 114 type – 144 type 0.00 072 type 072 type 168 type 16.53 096 type 072 type 192 type 27.56 096 type 096 type 228 type 27.56 114 type 114 type

(A) : Additional amount of refrigerant by pipe length (lb) (B) : Adjustment amount of refrigerant according to system capacity (lb) (A) + (B) : Additional amount of refrigerant (lb)

Additional refrigerant

charge amount (lb)

Actual length of liquid pipe

Additional refrigerant charge amount per liquid pipe 1ft

Adjustment amount of refrigerant according to system capacity

8-3. Check at main power-on

After turning on the main power of the indoor units and outdoor unit in the refrigerant line to conduct a test operation, check the following items in each outdoor and indoor unit. (After turning on the main power, be sure to check in order: indoor unit ➝ outdoor unit.)

(1) Check that all the rotary switches, SW01, SW02, and SW03, on the interface PC board of the header unit are

set to “1.”

(2) If another check code is displayed on the 7-segment display [B], remove the cause of the problem referring to

Section, “9 Troubleshooting”.

(3) Check that “L08” is displayed on the 7-segment display [B] on the interface PC board of the header unit. (L08:

Indoor address not set up) (If the address setup operation has already been completed during servicing, etc., the above check code is not

displayed, and only “U1” is displayed on the 7-segment display [A].)

(1) Display check on the remote control (in the case of a wired remote control)

Check that a frame, as shown in the following figure at left, is displayed on the LC display section of the remote control.

If no frame is displayed, as shown in the above figure at right, the remote control does not have a normal supply of power; check the following items.

• Check the power supply of the indoor unit.

• Check the cabling between the indoor unit and the remote control.

• Check whether there is a cutoff of wire around the indoor control PC board or not, and check for connection failures of the connectors.

• Check for failure of the transformer for the indoor electrical control box.

• Check for failure of the indoor control PC board.

Interface PC board

Push switches

7-segment display

[A]

7-segment display

[B]

Rotary switches

Normal status (power supplied and operation stopped)

When power is not supplied normally

Good No good

8-4. Address setup

This product requires address setup before operation. Follow this procedure for address setup.

8-4-1. Precautions

(1) Address setup is not performed simply by turning on the power supply. (2) For indoor units, address setup can be done either by manual address setup or by automatic address setup:

Automatic address setup: Setup from SW15 on the interface PC board of the header unit Manual address setup: Setup from the wired remote control. (For details, refer to “8-4-3. Address setup

procedure.”) (3) Automatic setup usually takes about 5 minutes per line. In some cases, however, it may take up to 10 minutes. (4) It is unnecessary to operate the air conditioner to achieve address setup.

8-4-2. Address setup and check procedure

Procedure Item Operation and check contents

1 Indoor unit power-on Turn on the power of the indoor unit for the refrigerant line for which the address is to be set up.

Outdoor unit power-on Turn on the power of all the outdoor units for the refrigerant line for which the address is to be

set up.

7-segment display check

Check that “L08” is displayed on the 7-segment display [B] on the interface PC board of the header unit in the system where the address is to be set up.

Address setup start Confirm the items in “8-4-3. Address setup procedure,” and then set up the address according

to the operation procedure. (Be careful to note that the setup operation may differ in group control and central control systems.)

Note:

The address cannot be set up if switches are not operated.

Display check after setup

• After address setup, “U1” “ ” is displayed on the 7-segment display.

• For follower outdoor units, “U2” to “U4” are displayed on the 7-segment display [A].

• If an error code is displayed on the 7-segment display [B], remove the cause of the problem referring to “9 Troubleshooting.”

System information check after setup

Using the 7-segment display function, check the system information of the scheduled system. (This check is executed on the interface PC board of the header unit.)

After the above checks, return rotary switches SW01, SW02, and SW03 to 1/1/1.

Rotary switch setup 7-s egment display

SW01 SW02 SW03 [A] [B]

System capacity *1 1 2 3 [Nominal tons] [ton]

Number of connected outdoor units

1 3 3 [Number of units] [ P ]

Number of connected indoor units

143

[Number of

connected units]

Outdoor Unit

capacity type

Nominal tons

072 type 6

096 type 8

114 type 10

144 type 12

168 type 14

192 type 16

228 type 20

Interface PC board

Push switches

7-segment display

[A]

7-segment display

[B]

Rotary switches

8-4-3. Address setup procedure

◆ Address setting procedure 1

Turn on indoor units first, and then turn on outdoor units.

2 About one minute after turning the power on, confirm that the 7-segment display on the interface

P.C. board of the header outdoor unit indicates .

3 Press SW 15 to start the automatic address setting.

(It may take up to 10 minutes (normally about 5 minutes) to complete one line’s setting.)

4 The 7-segment display indicates .

After the indication, starts flashing on the display. When the flashing stops and remain lit on the display, the setting is complete.

Interface P.C. board on the header outdoor unit

REQUIREMENT

• When 2 or more refrigerant lines are controlled as a group, be sure to turn on all the indoor units in the group before setting addresses.

• If you set the unit addresses of each line separately, each line’s header indoor unit is set separately. In that case, the CODE No. “L03” (Indoor header unit overlap) is indicated as running starts. Change the group address to make one unit the header unit using wired remote control.

Without central control or with central control of 1 refrigerant lines (Example 1)

: use Address setting procedure 1

With central control of 2 refrigerant lines (Example 2) : use Address setting procedure 2

Example 1 Example 2

When a single refrigerant line is centrally

cintrolled

When 2 or more refrigerant lines are centrally

controlled

Address setting procedure

See procedure 1 See procedure 2

Control wiring diagram

Outdoor

Indoor

Outdoor

Central

control

Central

control

Remote

control

Remote

control

Remote

control

Outdoor

Indoor

Outdoor

Central

control

Remote

control

Remote

control

Remote

control

U. 1. L08 (U. 1. flash)

Auto 1 → Auto 2 → Auto 3

U. 1. - - - (U. 1. flash)

U. 1. - - - (U. 1. light)

2,4

◆ Address setting procedure 2

Set a system address for each system using SW 13 and 14 on the interface P.C. board on the header outdoor unit of each system. (Factory default: Address 1)

NOTE

Be sure to set a unique address on each system. Do not use a same address as another system (refrigerant line) or a custom side.

Interface P.C. board on the header outdoor unit

Line address switches on the outdoor interface PC board (

{: switch on, ✕: switch off)

(Example) Controlling 2 or more refrigerant lines as a group

System wiring diagram

Outdoor

Indoor

Outdoor

Remote

control

(Group control)

Not used for setup of line address (do not change setup.)

Line address

2 Be sure to disconnect the relay connectors between the [U1U2] and [U3U4] terminals on all the

header outdoor units that will be connected to the central control. (Factory default: disconnected)

3 Turn on indoor units first, and then turn on outdoor units. 4 About 1 minute after turning the power on, confirm that the 7-segment display on the interface

P.C. board of the header outdoor unit indicates .

5 Press SW 15 to start the automatic address setting.

(It may take up to 10 minutes (normally about 5 minutes) to complete one line’s setting.)

6 The 7-segment display indicates .

After the indication, starts flashing on the display. When the flashing stops and , remains lit on the display, the setting is complete.

7 Repeat steps 4 to 6 for other refrigerant lines. 8 After completing address setting of all systems, 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 the lowest address.

(For unifying the termination of the wiring for the central control of indoor and outdoor units)

9 Connect the relay connectors between the [U1, U2] and [U3, U4] terminals of the header outdoor

unit of each refrigerant line.

INDOOR

UNIT

CENTRAL

CONTROL

OUTDOOR

UNIT

U. 1. L08 (U. 1. flash)

Auto 1 → Auto 2 → Auto 3

U. 1. - - - (U. 1. flash)

U. 1. - - - (U. 1. light)

INDOOR

UNIT

CENTRAL

CONTROL

OUTDOOR

UNIT

10 Set the central control address .

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

7-segment

display

Header unit interface P.C. board

SW30 * Header units are connected to the same

central control, except the header unit with the smallest line address number.

Switch setting (setting example when controlling 2 or more refrigerant lines centrally)

Outdoor units (setting manually)

*The items in bold font must be set manually.

CAUTION

Relay connector connection

Never connect relay connectors between the [U1, U2] and [U3, U4] terminals before completing address setting of all the refrigerant lines. Otherwise, the addresses cannot be set correctly.

Outdoor unit’s interface

P.C. board

Header unit Follower unit Header unit Follower unit Header unit Factory default

SW13, 14 (Line (system) address)

(No setting

required)

(No setting

required)

Dip switch 2 of SW30 (Terminator of indoor/ outdoor communication line and central control line)

(No setting

required)

Set to OFF

after setting

addresses.

(No setting

required)

Set to OFF

after setting

addresses.

Relay connector

Connect after

setting

addresses.

Open

Connect after

setting

addresses.

Open

Connect after

setting

addresses.

Open

Line (system) address 1 1 2 2 3

Indoor unit address 1 2 1 2 1

Group address 0 0 1 2 0

Central remote control

Relay

connector

Relay

connector

Relay

connector

Header unit

Follower unit

Remote

control

Remote

control

Remote

control

Remote

control

Individual

Group

Indoor units (automatic setting)

Manual address setup from the remote control

With indoor wiring work completed and outdoor wiring work not done—in cases where indoor unit addresses are decided in advance from the wired remote control, or in cases where addresses are change after address setup.

1 Arrange one indoor unit and one remote control set

to 1 by 1.

2 Turn on the power. 3 Push the + + buttons simultaneously for 4

seconds or more.

LCD begins blinking.

▼ (Refrigerant line address)

4 Using the buttons, set the DN code to 12. 5 Using the buttons, set up the line address

(match it with the line address on the interface PC board of the header unit on the same refrigerant line).

6 Push the button (OK when the display goes on).

▼ (Indoor address)

7 Using the buttons, set the DN code to 13. 8 Using the buttons, set up the indoor address.

(0001~0048)

9 Push the button (OK when the display goes on).

▼ (Group address)

10 Using the buttons, set the DN code to 14. 11 Using the buttons, set Individual = 0000,

Header unit = 0001, Follower unit = 0002.

12 Push the button (OK when the display goes on).

▼ (Central control address)

13 Using the buttons, set DN code to 03. 14 Using the buttons, set up the central control

address. (0001~0064)

15 Push button. (OK when display goes on). 16 Push the button.

Setup is finished (“Setting up” blinks; when “Setting up” goes off, operation is possible).

17 Return to the original wiring over remote controls.

(Wiring example for 2 refrigerant lines)

Line 1

Line 2

Outdoor

Indoor 1

Indoor 2

Indoor 3

Indoor 1

Indoor 2

Remote control

Line address

Indoor address

Group address

Header

Follower

Follower Follower

(Remote control group control)

In the above example, where remote controls are not yet wired, set the address manually after individually connecting the wired remote control.

(Wiring during manual address setup)

Outdoor

Indoor 1

Indoor 2

Indoor 3

Indoor 1

Indoor 2

Remote control

After address setup, return to the original wiring over remote controls.

Group address

Individual: 0000

Header unit: 0001 Follower unit: 0002

In cases of remote control group control

Set

data

DN code (CODE No.)

Line 1

Line 2

NOTE

(1) When setting the line address from the remote control, do not use addresses 29 and 30.

Addresses 29 and 30 cannot be set up on the outdoor unit. If they are incorrectly used, the code “E04” (indoor/outdoor communication circuit error) is output.

(2) When manual address setup has been done from a remote control, and central control over refrigerant lines is to be done,

setup the header unit of each line as follows:

• Using SW13 and SW14 on the interface PC board of the header unit of each line, setup the line address for each

line.

• Except for the line with the smallest line address number, set SW03-bit 2 to “off” for the interface PC board of the

header unit of lines connected to the same central control (put the resistance of the end terminals of the central control line, indoors and outdoors, into one).

• Connect the relay connector between U1/U2 and U3/U4 of the header unit for each refrigerant line.

• After that, set up the central control address. (For central control address setup, refer to the installation manual of

the central control devices.)

 Confirming the indoor unit addresses and the position of an

indoor unit using the remote control

◆ 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 control one-to-one), or it

is a group-controlled one.

(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 control (group-controlled units), a number of other connected units appears each time you push the button (left side of the button).

Starts running

To find an indoor unit’s position from its address

▼ When checking unit numbers controlled as a group

(Execute it while the units are stopped.)

The indoor unit numbers in a group are indicated one after another. The fan and louvers of the indicated units are 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.

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

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

Stop

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. (Sel ect 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 refrigerant line is indicated on the LCD display 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

Push the 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.

 Changing the indoor unit address using a remote control

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

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

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

(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..

Finish

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.

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

(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 control.

* Enter the address check/change mode and change the addresses.

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

(Execute it while the units are stopped.)

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.

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

Cancels the line selection

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.)

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.

 Resetting the address

(Resetting to the factory default (address undecided))

Method 1

Clearing each address separately using a wired remote control. Set the system address, indoor unit address and group address to “0099” using a wired remote control. (For the setting procedure, refer to the address setting procedures using the wired remote control on the previous pages.)

Method 2

Clearing all the indoor unit addresses on a refrigerate line at once from the outdoor unit.

1 Turn off the refrigerant line to reset to the factory default and set the header outdoor unit of the

line as below.

1) Disconnect the relay connectors between the [U1, U2] and [U3, U4] terminals.

(Leave them as they are if they have already been disconnected.)

Press to finish setting.

Finish

2) Turn on dip switch 2 of SW30 on the interface P.C. board of the header outdoor unit if the switch is OFF.

(Leave it as it is if it has already been set to ON.)

2 Turn on the indoor and outdoor units of the refrigerant line for which you want to initialize the

addresses. About one minute after turning on the power, confirm that the 7-segment display on the header outdoor unit indicates “U.1. - - -” and operate the interface P.C. board on the header outdoor unit of the refrigerant line as follows.

3 Confirm that the 7-segment display indicates “A.d. c.L.” and set SW01, SW02 and SW03 to 1, 1, 1

respectively.

4 After a time “U.1.L08” appears on the 7-segment display if the address clearing has been

completed successfully. If the 7-segment display indicates “A.d. n.G.”, the outdoor unit may still connected with other refrigerant lines. Check the connection of the relay connectors between [U1, U2] and [U3, U4].

NOTE

Take care to carry out the procedure above correctly; otherwise, addresses in other refrigerate lines may also be cleared.

5 Set the addresses again after finishing the clearance.

SW01 SW02 SW03 SW04 Clearable addresses

212

Confirm that the 7-segment display indicates “A.d.buS” and turn SW04 ON for more than five seconds.

System/indoor unit/group address

222

Confirm that the 7-segment display indicates “A.d.nEt” and turn SW04 ON for more than five seconds.

Central control address

Central remote control

Header unit

Follower unit

Remote control

Indoor units to have their addresses initialized

Header unit

 In the case of an increase in address-undefined indoor units

(extension, etc.)

To set up the indoor address of a unit with an address that is undefined due to the extension of indoor units or replacement of PC board, etc., follow the methods below.

Method 1

Set up an address individually from a wired remote control. (Line address, Indoor address, Group address, Central address) For the setup method, refer to “Manual address setup from the remote control.” above.

Method 2

Set up an address from the outdoor unit. * Leave the addresses of the units for which addresses have already been set up as they are. Set up an address

only for the unit where the address is undefined. Addresses are allocated from lower numbers.

Setup procedure

Set up the outdoor header units in the refrigerant line to which indoor units have been added, as follows.

1 Remove the relay connector between U1/U2 and U3/U4. 2 If it is off, turn on SW30-bit 2 on the interface PC board at outdoor header unit side.

*Turn off the power, and then execute the operation.

3 Turn on the indoor/outdoor power for the refrigerant line for which an address is to be set up.

After approximately 1 minute, check that “U.1. - - -” is displayed on the 7-segment display.

4 Execute the following operation on the interface PC board of the header unit.

“AUTO1” ➝ “AUTO2” ➝ “AUTO3” ➝ ... ➝ “AUTO9” ... is counted and displayed on the 7-segment display.

5 When “U.1. - - -” is displayed on the 7-segment display, the setup operation finished.

Turn off the indoor/outdoor power.

6 Return to the following setup as before.

• Relay connector

• SW30-bit 2

• SW01, SW02, SW03

SW01 SW02 SW03 SW04

2 14 2 After checking that “In.At” is displayed on the 7-segment display, push SW04 for 5 seconds or more.

Header unit

Follower unit

Remote control

Central control device

Header unit Header unit

Added indoor unit

8-4-4. Check after address setup when central control system is

connected

When the central control system is connected, check that the following setup has finished after address setup.

NOTE

The figure above does not show all the electric wires. For details, refer to the installation manuals for the outdoor unit, indoor unit, remote control, or optional devices.

Main check items Check

Relay connector

(1)Is the relay connector of the header unit connected after address setup?

(2)Is the relay connector of the follower unit removed?

Terminal resistance

(3)Is the end resistance (SW30-bit 2) of the header unit with the smallest line address number

in the central control turned on? (Setup is unnecessary for follower units.)

(4)Is the terminal resistance (SW30-bit 2) of the header units, except for the line with the

smallest central control line address, turned off? (Setup is unnecessary for follower units.)

Line address (5) Are addresses in the line address (SW13, SW14) not duplicated in each refrigerant line?

Central remote control

Other refrigerant line

Header unit (A)

Outdoor unit

Indoor unit

Header unit (A)

Follower unit (B) Follower unit (C)

Remote control

Line address = 2

Line address = 1

To other refrigerant line

8-5. Troubleshooting in test operation

If there are phenomena such as the output of a check code or the remote control is not accepted when poweredon after wiring work or during address setup operation, the following causes are considered.

8-5-1. A check code is displayed on the remote control

* “L05”: Displayed on the indoor unit set up with priority

“L06”: Displayed on the indoor units except the one set up with priority

Check the code

displayed on the

indoor remote

control

Header

unit 7-

segment

display

Cause Countermeasures

E04

– When outdoor power is off Check that the header outdoor unit power is on

L08

Address setup error

• Only line addresses of the connected indoor units are undefined.

• The outdoor line address and the line addresses of all the indoor units do not match.

• The indoor addresses are duplicated. (Units except those displaying E04 are duplicated.)

• A header unit is not set up in group control (except groups displaying E04).

Set up the address again.

E08 ⇔ -XX

Alternate

blinking

Duplication of indoor addresses (address number in the subcode of the check code are duplicated).

Set up the address again.

E07

There is no outdoor terminal resistance, or there are two or more resistances. (After address setup, when terminal resistance setup is changed after poweringon)

Check SW30 bit 2 of the header unit. No connection between multiple refrigerant lines: SW30 bit 2 is on. Connection between multiple refrigerant lines: SW30 bit 2 of the connected header unit is turned on only for one line.

Transmission circuit error at the interface side (PC board failure)

Replace the interface PC board.

E06

After address setup, communication from all the indoor units is interrupted under the condition that a normal operation can be performed.

Check and correct disconnection of the indoor/ outdoor communication line (the communication line between the header unit and the leading indoor unit). Check for the influence of communication noise.

E16

E16 ⇔ -XX

Alternate

blinking

Exceeded the number or capacity of connected indoor units

Adjust the number or capacity of connected indoor units.

E23 E23

Communication between outdoor units has stopped. Check the number of connected outdoor units.

Check that outdoor unit power is on.

E25 E25

Duplication of outdoor addresses (only when an outdoor address was manually set up)

Do not use manual setup for outdoor addresses.

E26

E26 ⇔ -XX

Alternate

blinking

Number of connected outdoor units has decreased.

• When installing an outdoor backup

• The power of a follower unit is not turned on.

Correction of the cause of error occurrence

• If it occurs when installing a backup, clear the error after setup finishes.

• If the power of a follower unit is not turned on, turn on the power.

L04 L04

Duplication of outdoor line addresses

• Line address setup error (occurred after connection between U1/U2 and U3/U4 connectors)

Modify the line address setup of the header unit between lines. (Set up SW13 and SW14 on the interface PC board.)

L05(*) L06 Duplication of indoor units with priority Set up priority only for one indoor unit.

L06(*)

There are two or more indoor units set up with priority.

Among indoor units indicating “L05,” set one unit with priority.

L08 L08

Address setup error

• Only indoor addresses of all the connected indoor units are undefined.

Set up the addresses again. Modify the setup.

8-5-2. Operation from the indoor remote control is not accepted,

and a check code is displayed on the 7-segment display of the interface PC board of the header unit.

8-5-3. There is no display of a check code on the 7-segment

display on the interface PC board of the header unit, although there is indoor unit that is not accepting operation from the indoor remote control.

Indoor remote control status

Header unit

7-segment

display

Cause Countermeasures

No response

L08

Line addresses and indoor addresses of all the connected indoor units are not set.

Set up addresses.

There is no header unit of group control. Set up a group address.

E19 ⇔ -00

Alternate

blinking

Indoor unit power is not turned on. Turn on the power again. (In the order:

indoor ➝ outdoor)

Indoor/outdoor communication line is not correctly connected to the U1/U2 terminal of the header unit ( Fig. 1). (Indoor/ outdoor cannot communicate before address setup.)

Correct wiring

There is no of outdoor terminal resistance, or there are two or more resistances (before address setup).

E19 ⇔ -02

Alternate

blinking

When connecting an indoor/outdoor communication line between outdoor units under the condition of a connected communication line between outdoor units ( Fig. 2).

Correct wiring

SW08 setup error Turn all SW08 switches to “off.”

E20 ⇔ -01

Alternate

blinking

Address setup is performed with connecting an indoor/ outdoor communication line between outdoor units ( Fig. 3).

Correct wiring

Address setup is performed under the condition of connecting multiple refrigerant lines ( Fig. 3).

Correct wiring

Indoor remote control status

Header unit

7-segment

display

Cause Countermeasures

No response None

The communication line is not connected between indoor and outdoor (the unit that does not respond to the indoor remote control).

Modify the wiring.

Line address and indoor address are not set (the unit that does not respond to the indoor remote control).

Set up the address.

The power of the header unit of the group is not turned on in indoor group control (the unit that does not respond to the indoor remote control).

Turn on the power.

Group address is set to the follower unit for individual control (the unit that does not respond to the indoor remote control).

Set the group address to “0” in the case of individual control.

No display on the

indoor remote

control (no line is

output.)

None

The power is not turned on (the unit that is not displayed on the indoor remote control).

Turn on the power.

The indoor remote control is not connected with a wire (the unit that is not displayed on the indoor remote control).

Modify the wiring.

Miswiring of the indoor remote control (the unit that is not displayed on the indoor remote control)

Modify the wiring.

Indoor remote control communication circuit error (the unit that is not displayed on the indoor remote control) If 460 V is incorrectly applied to the indoor remote control terminal, the remote control communication circuit fails.

Remove the fast-on terminal connected to indoor remote control terminals A/B, and check the voltage. If voltage is not applied (normally 15 to 18 V), replace the PC board.

8-5-4. In checking the number of connected outdoor units and

connected indoor units after address setup, a lower number of connected units is displayed. (There are outdoor/indoor units that do not operate in a test operation.)

Status Cause Countermeasures

The number of

connected

outdoor units is

too few.

Miswiring of communication lines between outdoor units or an unconnected wire ( Fig. 4). (Address setup operation finished without recognizing a miswired follower unit.)

After modification of wiring, set up the addresses again and check the number of connected outdoor units.

The number of

connected indoor

units is too few.

Miswiring of communication lines between indoor units or an unconnected wire ( Fig. 5). (Address setup operation finished without recognizing a miswired indoor unit.)

After modification of wiring, set up the addresses again and check the number of connected indoor units.

The number of

outdoor units

connected to a

group is too few in

group operation

from an indoor

remote control.

The indoor remote control is not connected with wire. Miswiring of the indoor remote control

Using the main indoor remote control connected to a group, start a test operation, specify the unit that is not operating (the unit not connected to the group), and then check the wiring.

Indoor remote control communication circuit error If 460 V is incorrectly applied to the remote control terminal, the remote control communication circuit fails.

Using the main indoor remote control connected to a group, start a test operation and then specify the unit that is not operating (the unit not connected to the group). Remove the fast-on terminal connected to remote control terminals A/B, and check the voltage. If voltage is not applied (normally 15 to18 V), replace the PC board.

Miswiring example

Figure

Remote

control

status

Header unit

7-segment

display

Miswiring example

Fig. 1

response

E19-00

Fig. 2

response

E19-02

Fig. 3

response

E20-01

Figure Status Miswiring example

Fig. 4

The number of connected outdoor units is too few.

Fig. 5

The number of connected indoor units is too few.

Header unit

Follower unit

Header unit

Follower unit

Header unit

Follower unit

Header unit

[Line 1]

Follower unit

[Line 2]

Header unit

Follower unit

Header unit

Follower unit

Header unit

Follower unit

Header unit

Follower unit

Wiring forgotten

8-6. Test operation check

8-6-1. Fan check

START

Push the Start/Stop button on the remote control.

Select the " Fan" operating mode.

Is air discharged from the discharge port of the indoor unit?

Is the sound normal?

Normal

Check every indoor unit in turn.

Check code appears

When a check code has been displayed on the remote control, remove the cause of the error, referring to "Check code and check position displayed on remote control and outdoor unit."

Check the indoor fan, fan motor, and fan circuit.

Check positions around the fan.

8-6-2. Cooling/heating test operation check

The cooling/heating test operation check can be performed on both the indoor remote control and the outdoor header unit interface PC board.

(1) Test operation start/stop operation Test operation from the indoor remote control

• Wired remote control: Refer to the items below in “Test operation” of the wired remote control.

• Wireless remote control: Refer to the items below in “Test operation” of the wireless remote control.

▼ Wired remote control ▼ Wireless remote control (Except the 4-way

Cassette type and the Ceiling type)

Procedure Operation content

When the Test button is pushed for 4 seconds or more, “TEST” is displayed in the display section, and the unit enters test operating mode.

Push the button.

Using the Select Mode button, select the “ COOL” or “ HEAT” operating mode.

• Do not use an operating mode other than “ COOL” or “ HEAT”.

• Temperature adjustment is unavailable during test operation.

• Error is detected as usual.

When the test operation has finished, push the

button to stop the operation.

(The same display as in procedure 1 appears in the display section.)

Push the Test button to clear the test operating mode. (“TEST” disappears from the display section, and the status returns to the normal stopped status.)

Procedure Operation content

Remove the nameplate of the receiver section by inserting a screwdriver or similar tool into the notch at the bottom of the plate, and set the DIP switch to “TEST RUN ON.”

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

• The “ ”, “ ” and “ ” LEDs blink during test operation.

• Under “TEST RUN ON” status, temperature adjustment from the wireless remote control is invalid.

Do not use this method of operation other than for test operation because the equipment will be damaged.

Use either the “ COOL” or “ HEAT” operation mode for a test operation. * The outdoor unit does not operate for

approximately 3 minutes after powering-on or stopping operation.

After the test operation is finished, stop the air conditioner from the wireless remote control, and return the DIP switch of the sensor section to its original position. (A 60-minute timer clearing function is attached to the sensor section in order to prevent continuous test operation.)

M4 × 25 screw (2 pieces)

Receiver unit

Spacer

Nameplate

Notch

Small screw

Test operation from the outdoor unit

• Refer to “8-7-2. Function to start/stop (ON/OFF) indoor unit from outdoor unit” in “8-7. Service support function.” Note: The test operation returns to normal operating mode after 60 minutes.

▼ Wireless remote control (4-way Cassette type) ▼ Wireless remote control (Ceiling type)

Outline of test operation from the wireless remote control Test cooling operation: Start

➝ 64.4 °F (18 °C) ➝ 66.2 °F (19 °C) ➝ 64.4 °F (18 °C)

➝ 66.2 °F (19 °C) ➝ 64.4 °F (18 °C) ➝ 66.2 °F (19 °C) ➝

64.4 °F (18 °C) ➝ (Test operation) ➝ Stop Test heating operation: Start

➝ 86 °F (30 °C) ➝ 84.2 °F (29 °C) ➝ 86 °F (30 °C) ➝

84.2 °F (29 °C) ➝ 86 °F (30 °C) ➝ 84.2 °F (29 °C) ➝ 86 °F (30 °C)

➝ (Test operation) ➝ Stop

Procedure Operation content

Turn off the air conditioner’s power. Remove the adjustment corner cap attached to the sensor section from the ceiling panel. For removing method, follow the installation manual attached to the ceiling panel. (Be careful when handling the sensor section because it has cables connected to it.) Remove the sensor cover from the adjustment corner cap (held with 1 screw).

Change Bit 1, “TEST,” of switch S003 on the sensor PC board from “off” to “on.” Replace the sensor cover and attach the adjustment corner cap with the sensors to the ceiling panel. Turn on the air conditioner’s power.

Push the button of the wireless remote control, and select the “ COOL” or “ HEAT” operating mode with the Mode button. (All display lamps on the wireless remote control sensor section blink during the test operation.)

• Do not use any operating mode other than “ COOL” or “ HEAT”.

• Error is detected as usual.

When the test operation has finished, push the button to stop the operation.

Turn off the air conditioner’s power. Change Bit 1 of switch S003 on the sensor PC board from “on” to “off.” Attach the adjustment corner cap with the sensors to the ceiling panel.

Sensor cover

Adjustment corner cap

Sensor PC board

Bit 1

Procedure Operation content

Turn on the air conditioner’s power.

Push the button and change the operating mode to “ COOL” or “ HEAT” with the Mode button. Then change the fan speed to “ High” using the “Fan” button.

Test cooling operation Test heating operation

Set the temperature to

64.4 °F (18 °C) using the Temperature setting button.

Set the temperature to 86 °F (30 °C) using the Temperature setting button.

After checking for the receiving “beep” tone, immediately push the Temperature setting button to set it to 66.2 °F (19 °C).

After checking for the receiving “beep” tone, immediately push the Temperature setting button to set it to 84.2 °F (29 °C).

After checking for the receiving “beep” tone, immediately push the Temperature setting button to set it to 64.4 °F (18 °C).

After checking for the receiving “beep” tone, immediately push the Temperature setting button to set it to 86 °F (30 °C).

Then repeat steps 4 ➝ 5➝ 4 ➝ 5. After approximately 10 seconds, the “OPERATION” (green) and “READY” (yellow) display lamps on the sensor part of the wireless remote control blink, and the air conditioner starts operating. If the lamps do not blink, repeat step

2 and the

subsequent steps.

After the test operation, push the Start/Stop button to stop the operation.

This operation is not accepted for 5 minutes when power has been turned on for the first time after installation, and for 1 minute when power has been turned on the second and subsequent times after that. After the specified time has passed, perform the test operation.

Always select [ HIGH] fan speed.

(2) Test operation

START

Test operation for one indoor unit

Operation starts

Is cold air or hot air discharged?

Is air circulation sufficient?

Operate all the indoor units at once.

Is there adequate temperature difference

between suction and discharge?

Is the operating voltage correct?

460 V ±10 %)

Is the operating current normal?

Is the operating pressure normal?

Normal

Note 1

Note 2

Note 3

Notes 1-3 are on the next page.

Refer to "Test operation procedure" of the indoor remote control.

The operation does not start for approximately 3 minutes after powering-on or stopping operation.

Note: After powering-on, it may require up to 10 minutes to start the operation due to the initial communications of the system.

Check the operating status of the compressor.

Check the direction of the louver.

Execute a test operation using "Start/Stop Function of the Indoor Unit from Outdoor Unit" in the "Service Support Function" section.

• Check power voltage of the main power supply.

• Check the cable size of the power supply.

• Check the temperature load of the indoor/outdoor units.

• Check the pipe length and refrigerant amount.

• Check the operating Hz of the compressor.

• Check the operation of the outdoor fans.

• Check for abnormal sound in the outdoor unit.

(Abnormal sound, etc. of the

compressor and other components)

Test operation for every indoor unit in turn

Note 1: Criteria for the difference between suction and discharge temperatures

(1) Cooling operation

After operating for a minimum of 30 minutes in “COOL” mode, if the ΔT dry bulb temperature difference between suction and discharge air of the indoor unit is 46.4 °F (8 °C) or more, it is normal.

(2) Heating operation

After operating for a minimum of 30 minutes in “HEAT” mode, if the ΔT dry bulb temperature difference between suction and discharge air of the indoor unit is 59 °F (15 °C) or more, it is normal. * If demand from the indoor unit on the outdoor unit is low because the difference between the temperature set

by the remote control and the temperature of the room is small, then the ΔT temperature difference is small.

* Consider that ΔT temperature difference may diminish in cases of a system in which the connected indoor unit

capacity exceeds the outdoor unit capacity, the pipe length is long, or a large difference exists among outdoor units.

Note 2: Criteria for operating power current

The table below shows the maximum current for each outdoor unit. Under standard conditions, operating current is about 80% of the value shown in the table below.

Note 3: Criteria for cycle status

(1) These data are based on operating a 4-way Cassette type air conditioner of 100% connection with standard

piping length. Data may vary depending on temperature conditions, installed pipe length, and room shape combinations, or

indoor unit connection capacity. For pressure criteria in different temperature conditions, refer to (2).

* This compressor is driven with a 4-pole motor. The value of the compressor frequency (rps) measured with a clamp meter at the compressor

lead line is two times the rotation count (rps) of the compressor. * Each compressor may have a different frequency as a measure against resonance. * The temperature of the indoor heat exchanger (TC) indicates TCJ sensor temperature when cooling, and TC2 sensor temperature when

heating, respectively.

(2) Criteria for operating pressure

* Criteria after 15 minutes or more has passed since operating started

(3) On rotations of outdoor fans

Outdoor fans may rotate slowly to control pressure when cooling with low outer air temperature or heating with excessive load. For control content, also refer to items in Section 6, “Control Outline: Outdoor Unit, Outdoor Fan Control.”

Model MMY-MAP 0724HT6UL 0964HT6UL 1144HT6UL

Current value (A) 18 23 24

Model

Operating

mode

Pressure

(psi)

Pipe surface temperature

(°F)

Number of compressor

rotations

(rps)*

Indoor

fan

Air temp.

condition

(DB/WB) (°F)

MMY-MAP Pd Ps

Discharge

(TD)

Suction

(TS)

Indoor

heat

exchanger

(TCJ)

Outdoor

heat

exchanger

(TE)

Liquid

temp.

(TL)

Comp.1 Comp.2 Comp.3 Indoor

Outdo

0724HT6UL

Cooling 410 130 180 60 48 105 105 50 50 – High 80/67 95/-

Heating 420 102 181 40 100 35 90 50 50 – High 70/- 47/43

0964HT6UL

Cooling 415 130 181 60 48 105 105 45 45 45 High 80/67 95/-

Heating 430 102 183 38 100 35 90 50 50 50 High 70/- 47/43

1144HT6UL

Cooling 435 130 183 60 50 105 105 50 50 50 High 80/67 95/-

Heating 420 100 181 39 100 35 90 57 57 57 High 70/- 47/43

Operating mode Cooling Heating

Indoor temp. (°F) 64 – 90 59 – 77

Outdoor temp. (°F) 77

– 95 41 – 50

Pressure

Pd (psi) 290

– 465 365 – 475

Ps (psi) 75

– 135 70 – 110

8-7. Service support function

8-7-1. Check function for connecting of refrigerant and control

lines

This function is provided to check misconnection of the refrigerant pipes and the control transmission line (Wiring over lines) between indoor unit and outdoor unit by using the switch on the interface P.C. board of the header unit. However, be sure to check the following items prior to executing this check function.

1 This check function does not work when a group operation by remote control is performed and it

is used over outdoor units.

2 When using this check system, be sure to check for each 1 line in the unit of outdoor unit. If

checking the multiple lines at the same time, misjudgment may be caused.

(Check procedure)

Power ON

Be sure to turn on the power at indoor

side before power-ON of outdoor unit.

System capacity check Set the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/2/3]. Then the system capacity is displayed on 7-segment display [A]. Check that this display surely matches with the expected system

capacity.

Check No. of outdoor units Set the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/3/3]. Then No. of outdoor units connected to the system is displayed on 7-segment display [A]. Check that this display surely matches with the expected No. of outdoor units.

Check No. of indoor units/No. of units with cooling thermo ON Set the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/4/3]. Then No. of indoor units connected to the system is displayed on 7-segment display [A]. Check that this display surely matches with the expected No. of indoor units.

Check No. of indoor units/No. of units with heating thermo ON Set the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/5/3]. Then No. of indoor units connected to the system is displayed on 7-segment display [A]. Check that this display surely matches with the expected No. of indoor units.

Check incorrect wiring According to the indoor temperature, select one of the following items for setup of the rotary switches on the interface P.C. board of the header unit. Cooling: SW01/SW02/SW03 to [2/1/1] Heating: SW01/SW02/SW03 to [2/2/1]

(7-segment display)

System horsepower

(7-segment display)

No. of

connected

outdoor units

No. of

connected

outdoor

units

No. of units with cooling

thermo ON

No. of

connected

outdoor

units

No. of units with cooling

thermo ON

(7-segment display)

Cooling Heating

Indoor temperature [°F(°C)]

Outdoor temperature [°F(°C)]

SW02 to

[2]

(Heating)

SW02 to

[1]

(Cooling)

(7-segment display)

Cooling Heating

Operation

This check operation requires 15 minutes even if there is no misconnection or there is any misconnection.

No. of misconnected

indoor units

(7-segment display)

Address display

of misconnected

indoor unit

(7-segment display)

Operation start Press the push-switch SW04 on the interface P.C. board of the header unit for 2 seconds or more. The operation starts. Check that 7-segment display [B] shows [ CC] for cooling and [ HH] for heating.

Confirmation of check results (1) Check that No. of misconnected indoor units is displayed on 7-segment display [B] after 15 minutes. (If there is no misconnection, [00P] is displayed.)

Confirmation of check results (2) Press the push-switch SW05 on the interface P.C. board of the header unit for 2 seconds or more. The indoor address in which error is being detected is displayed on 7-segment display [B]. If there are multiple indoor address in which error is being detected, they are successively exchanged and displayed. (When SW05 is turned on again, the display returns to display of No. of units.)

After check, return the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/1/1].

7-segment display [A]

7-segment display [B]

8-7-2.

Function to start/stop (ON/OFF) indoor unit from outdoor unit

The following functions of the indoor unit can start or stop by the switches on the interface P.C. board of the header unit.

NOTE 1) This start/stop function only sends the signals from the outdoor unit to the indoor unit, such as start, stop,

operation mode, etc. It does not resend the signals even if the indoor unit does not follow the sent signals.

NOTE 2) The above controls are not used during abnormal stop.

No Function Outline Setup/Release 7-segment display

Cooling test operation

Changes the mode of all the connected indoor units collectively to cooling test operation.

Note)

Control operation same as usual test operation from remote control is performed.

[Setup] Set SW01/SW02/SW03 to [2/5/1], and press SW04 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1/1/1].

Section A

[C. ]

Section B

[ – C]

Heating test operation

Changes the mode of all the connected indoor units collectively to heating test operation.

Note)

Control operation same as usual test operation from remote control is performed.

[Setup] Set SW01/SW02/SW03 to [2/6/1], and press SW04 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1/1/1].

Section A

[H. ]

Section B

[ – H]

Batch start Starts all the connected indoor

units collectively. Note)

The contents follow to the setup of remote control.

[Setup] Set SW01/SW02/SW03 to [2/7/1], and press SW04 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1].

Section A

[C.H]

Section B

[ 11]

[ 00] is displayed on Section B for 5 seconds.

Batch stop Stops all the connected indoor

units collectively.

[Setup] Set SW01/SW02/SW03 to [2/7/1], and press SW05 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1].

Section A

[C.H]

Section B

[ 00]

[ 00] is displayed on Section B for 5 seconds.

Individual start

Starts the specified indoor unit. Notes)

• The contents follow to the setup of remote control.

• The other indoor units keep the status as they are.

[Setup] Set SW01 to [16], set SW02 and SW03 to address No. (1 to 64) to be started, and press SW04 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1/1/1].

Section A

[ ]

Section B

[ ]

Section A: Displays the corresponding indoor address. Section B: Displays [ 11] for 5 seconds from operation-ON.

Individual stop

Stops the specified indoor unit. Note)

The other indoor units keep the status as they are.

[Setup] Set SW01 to [16], set SW02 and SW03 to address No. (1 to 64) to be stopped, and press SW05 for 2 seconds or more. [Release] Return SW01/SW02/SW03 to [1/1/1].

Section A

[ ]

Section B

[ ]

Section A: Displays the corresponding indoor address. Section B: Displays [ 00] for 5 seconds from operation-OFF.

Individual test operation

Operates the specified indoor unit. Note)

The other indoor units keep the status as they are.

[Setup] Set SW01 to [16], set SW02 and SW03 to address No. to be operated, and press SW04 for 10 seconds or more. [Release] Return SW01/SW02/SW03 to [1/1/1].

Section A

[ ]

Section B

[ ]

Section A: Displays the corresponding indoor address. Section B: Displays [ FF] for 5 seconds from test operation-ON.

7-segment display [A]

7-segment display [B]

(1) Cooling test operation function This function is provided to change collectively the mode of all the indoor units connected to the same system for

the cooling test operation mode, by using switches on the interface board of the header unit. <Operation procedure>

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

Power ON

Set SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/5/1]. ([C. ] is displayed on 7-segment display [A].)

Press SW04 on the same board for 2 seconds or more.

[Test run] is displayed on the remote control of the indoor unit to be operated. Check that [ – C] is displayed on 7-segment display [B] on the interface P.C. board of the header unit.

Return SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/1/1], or press the push-switch SW05 for 2 seconds or more.

Be sure to turn on power at the indoor side before power-ON of outdoor unit.

Start

Operation check

Stop/End

7-segment display [A]

7-segment display [B]

(2) Heating test operation function This function is provided to change collectively the mode of all the indoor units connected to the same system for

the heating test operation mode, by using switches on the interface board of the header unit. <Operation procedure>

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

Power ON

Set SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/6/1]. ([H ] is displayed on 7-segment display [A].)

Press SW04 on the same board for 2 seconds or more.

[Test run] is displayed on the remote control of the indoor unit to be operated. Check that [ – C] is displayed on 7-segment display [B] on the interface P.C. board of the header unit.

Return SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/1/1], or press the push-switch SW05 for 2 seconds or more.

Be sure to turn on power at the indoor side before power-ON of outdoor unit.

Start

Operation check

Stop/End

7-segment display [A]

7-segment display [B]

(3) Batch start/stop (ON/OFF) function This function is provided to start/stop collectively all the indoor units connected to the same system by using

switches on the interface board of the header unit. <Operation procedure>

Power ON

Set up the operation mode of the remote control. (If it is not set up, the operation continues with the current mode.) (FAN/COOL/HEAT)

Set SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/7/1].

([C.H ] is displayed on 7-segment display [A].)

Press SW04 on the same board for 2 seconds or more.

After test operation, return the rotary switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/1/1].

The indoor unit to be started operates.

Press the push-switch SW05 on the interface P.C. board of the header unit for 2 seconds or more.

If the discharge temperature does not change though COOL or HEAT has been set up from the remote control, misconnection is considered.

Be sure to turn on power at the indoor side before power-ON of outdoor unit.

If an error is already displayed with SW01/SW02/SW03 being [1/1/1], return the status to normal one according to troubleshooting and then execute a test operation.

The unit which is not given with priority by heating priority control, cooling priority control, and selection of cooling or heating mode is not operated. In this case, " operation ready" or " operation mode controlled" is displayed on the remote control.

Start

Operation check

Stop

End

7-segment display [A]

7-segment display [B]

(4) Individual start/stop (ON/OFF) individual test operation function This function is provided to start/stop (ON/OFF) individually each indoor unit connected to the same system by

using switches on the interface board of the header unit. Set SW01 [16] and set SW02, SW03 to indoor address No. (1 to 64) to be started (Refer to the following table*) only the setup indoor unit starts operation.

(In the rotary switches of the indoor unit which operates in a group by the remote control, the follower unit cannot be individually started or stopped. In this case, [ - - ] is displayed on 7-segment display [B] on the interface P.C. board of the header unit.) <Operation procedure>

NOTE) The individual test operation returns to the normal operation after 60 minutes.

Power ON

Set up the operation mode of the remote control. (If it is not set up, the operation continues with the current mode.)

Match the rotary switches on the interface P.C. board of the header unit to the following table*.

Be sure to turn on power at the indoor side before power-ON of outdoor unit.

If an error is already displayed with SW01/SW02/SW03 being [1/1/1], return the status to normal one according to troubleshooting and then execute a test operation.

7-segment display [A]

7-segment display [B]

(7-segment display)

Address display

of corresponding

indoor unit

[ 00] is displayed

for 5 seconds after

operation-ON.

Press the push-switch SW04 on the same board for 2 seconds or more. (If pressed continuously for 10 seconds or more, the operation changes to the individual test operation.)

Address display

of corresponding

indoor unit

[ 11] is displayed for 5 seconds after operation-ON. (For individual test operation, [ FF] is displayed.)

The indoor unit to be started operates.

Operation check

If the discharge temperature does not change though COOL or HEAT has been set up from the remote control, misconnection is considered.

(7-segment display)

Address display

of corresponding

indoor unit

[ 00] is displayed

for 5 seconds after

operation-ON.

Press the push-switch SW05 on the interface P.C. board of the header unit for 2 seconds or more.

After test operation, return the display select switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [1/1/1].

End

Units to be operated

Address 1 to Address 16 } individually

Address 17 to Address 32 } individually

Address 33 to Address 48 } individually

Address 49 to Address 64 } individually

In individual start/stop

End

(7-segment display)

8-7-3. Error clearing function

(1)Clearing from the wired remote control

▼ Error clearing in outdoor unit

Error of the outdoor unit currently detected is cleared by the unit of one refrigerant circuit system to which the indoor units operated by the remote control is connected. (Error of the indoor unit is not cleared.) For clearing errors, the service monitor function of the remote control is used.

1 Change the mode to service monitor mode by pushing + buttons simultaneously for 4

seconds or more.

2 Using buttons, set CODE No. to “FF”. 3 The display in Section A in the following figure is counted with interval of 5 seconds as

“0005” --> “0004” --> “0003” --> “0002” --> “0001” --> “0000”.

When the count arrives “0000”, the error is cleared.

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

4 When button is pushed, the status returns to the normal status.

▼ Error clearing in indoor unit

Error in the indoor unit is cleared by button on the remote control. (Only error of the indoor unit connected with operating remote control is cleared.)

Section A

(2)Clearing error by using switches on the interface board of the header unit

Using the switches on the interface P.C. board of the header unit, this function is to clear the currently detected error for each refrigerant circuit system without resetting the power supply. Errors in both outdoor and indoor units are once cleared, and error detection is performed again.

(3)Clearing error by resetting power

This function is provided to clear error in a system by resetting the power of all the outdoor and the indoor units. As same as the clearing method by the interface P.C. board, errors of both the outdoor and the indoor units are once cleared, and error detection is performed again.

(1) Be sure to reset power of both the outdoor and the indoor units. (2) Turn on the power of the indoor unit prior to the power of the outdoor unit.

(If the power is turned on in reverse order, a check code [E19] (No. of header unit error) is output.)

NOTE) After power reset, it requires usually 3 minutes to power-on due to the initial communication of the

system. In some cases, it requires max. 10 minutes.

(7-segment display)

Set the rotary switches on the interface P.C. board of the header unit as follows.

Set SW01/SW02/SW03 to [2/16/1]

Press the push-switch SW04 on the same board for 5 seconds or more.

[ C L] is displayed in 7-segment display [B] on the board (for 5 seconds), and the error is completely cleared.

7-segment display [A]

7-segment display [B]

Interface P.C. board

8-7-4. Remote control distinction function

This function is provided to distinguish the remote control connected to the indoor unit from the outdoor unit for a refrigerant circuit system by using switches on the interface P.C. board of the header unit. <Distinction procedure>

(7-segment display)

Power ON

Be sure to turn on the power of the indoor unit prior to the power of the outdoor unit.

Set the display select switches on the interface P.C. board of the header unit as follows: Set SW01/SW02/SW03 to [2/4/1]

Press the push-switch SW04 on the same board for 2 seconds or more.

"Checking" display of the connected remote control flashes.

Press the push-switch SW05 on the interface P.C. board of the header unit for 2 seconds or more.

Check the connected remote control

End

Other end conditions:

1. 10 minutes has passed

2. SW01, SW02, or SW03 changed to other position.

Operation

7-segment display [A]

7-segment display [B]

Interface P.C. board

8-7-5. Pulse motor valve (PMV) forced open/close function in

indoor unit

This function is provided to open or close forcedly PMV for 2 minutes in all the indoor units by the switch operation on the interface P.C. board of the header unit. This function is also used to open PMV fully when turning off the power and executing an operation.

<Operation> [Open fully]

Set the switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/3/1], and press SW04 for 2 seconds or more. (Display appears on 7-segment display for 2 minutes as follows.) [P ] [ FF]

[Close fully]

Set the switches SW01/SW02/SW03 on the interface P.C. board of the header unit to [2/3/1], and press SW05 for 2 seconds or more. (Display appears on 7-segment display for one minute as follows.) [P ] [ 00]

[Clear]

After 2 minutes (1 minutes for “Close fully”) after setting up, the opening automatically returns to the normal opening.

8-7-6. Pulse motor valve (PMV) forced open fully/close fully

function in outdoor unit

This function is provided to forcedly open or close fully P.M.V. (PMV1/PMV2, PMV4) used in the outdoor unit for 2 minutes.

[PMV1/PMV2 Open fully]

On the interface board of the outdoor unit, set the dip switch [SW12·bit1] to [OFF], [SW12·bit2] to [OFF], and shortcircuit CN30.

[PMV1/PMV2 Close fully]

On the interface board of the outdoor unit, set the dip switch [SW12·bit1] to [OFF], [SW12·bit2] to [OFF], and shortcircuit CN31.

[PMV4 Open fully]

On the interface board of the outdoor unit, set the dip switch [SW12·bit1] to [OFF], [SW12·bit2] to [ON], and shortcircuit CN30.

[PMV4 Close fully]

On the interface board of the outdoor unit, set the dip switch [SW12·bit1] to [OFF], [SW12·bit2] to [ON], and shortcircuit CN31.

[Clear]

For both open fully and close fully, after 2 minutes, the opening returns to the normal opening. Be sure to remove the cord used for short-circuit after confirmation, and set the dip switch [SW12·bit1] to [OFF] and [SW12·bit2] to [OFF].

Toshiba MMY-MAP0724HT6UL, MMY-MAP0964HT6UL, MMY-MAP1144HT6UL Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual