Panasonic Urban Multi MX1R Series User manual

ORDER No. PACD011001C2
Service Manual
Urban Multi
UM Series Using R-407C
Inverter MX1R Series
Heat Recovery ME1R Series
Combination MA1R Series
UM Series Using R-22
Inverter MX1 Series
Heat Recovery ME1 Series
2001 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.
Specifications are subject to change without notice for further improvement.
WARNIING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacture’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacture.

PACD011001C2
Table of Contents i
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1.Introduction...........................................................................................xiii
1.1Safety Cautions......................................................................................xiii
1.2Survey of Possible UM Outdoor Units...................................................xvii
1.3Survey of Possible UM Indoor Units.....................................................xviii
1.4Nomenclature........................................................................................xix
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1.Outline of System....................................................................................4
1.1MX1 Series...............................................................................................4
1.2Changes in “MX1” Series Functions /Parts.............................................5
1.3ME1 Series...............................................................................................7
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1.Function................................................................................................10
1.1Outdoor UnitRefrigerant System Diagram.............................................10
1.2List of SafetyDevicesand Functional Parts Setting Values...................18
1.3Flow of Refrigerant in Each Operation Mode (ME1 Series)...................20
1.4Outline of Control (ME1 Series).............................................................25
1.5Safety for Restart...................................................................................27
1.6Equalized Oil LevelOperation
(Equalized Oil Level between TwinCompressors).................................30
1.7Oil Return Operation..............................................................................31
1.8Defrost....................................................................................................33
1.9Pressure Equalization Control (ME1 Series)..........................................36
1.10Frequency Limit Control by Pressure Equalization (ME1 Series)..........37
1.11HR Changeover Control (ME1 Series)...................................................38
1.12Pump Down Residual Operation............................................................39
1.13StepDown / Safety Control →Standby (ForcedThermostatOFF)
→Stop Due toMalfunction....................................................................42
1.14Control During Low Outdoor Air Temperature Cooling..........................45
1.15Low Noise Control..................................................................................47
1.16Demand Control.....................................................................................48
1.17Compressor Capacity Control................................................................49
1.18Te / Tc Setting........................................................................................50
1.19Gas Depletion Alarm..............................................................................51
1.20Drain PumpControl................................................................................52

PACD011001C2
ii Table of Contents
1.21 Oil Temperature Sensor (8 and 10 Hp only) ..........................................54
1.22 Louver Control for Preventing Ceiling Dirt..............................................55
1.23 Thermostat Sensor in Remote Controller...............................................56
1.24 Freeze Prevention..................................................................................58
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1. Test Operation ......................................................................................60
1.1 Procedure and Outline ...........................................................................60
1.2 When Power is Turned On.....................................................................62
1.3 Outdoor Unit PC Board Ass’y.................................................................63
1.4 Setting Modes (MX1 Series) ..................................................................67
1.5 Setting Modes (ME1 Series) ..................................................................73
1.6 Sequential Start......................................................................................79
1.7 BMS Interface Adaptor for Outdoor Unit (MX1 Series) ..........................80
1.8 BMS Interface Adaptor for Outdoor Unit (ME1 Series) ..........................83
1.9 Cool / Heat Mode Selection (MX1 Series)..............................................87
1.10 Cool / Heat Mode Switching (ME1 Series).............................................92
1.11 Low Noise / Demand Operation (MX1 Series).......................................94
1.12 Low Noise Operation (ME1 Series)........................................................96
1.13 Demand Control (ME1 Series)...............................................................97
1.14 Wiring Check Operation.........................................................................98
1.15 Indoor Unit PCB Ass’y............................................................................99
1.16 Remote Controllers (Wired and Wireless)............................................100
1.17 Control by Remote Controller
(Double Remote Controllers, Group, Remote).....................................106
1.18 Indoor Field Setting..............................................................................108
1.19 Centralised Control Group No. Setting.................................................110
1.20 Setting of Master Remote Controller....................................................112
1.21 Centralised Control Devices.................................................................114
1.22 Central Remote Controller (CZ-01ESM11P)........................................116
1.23 Unified ON/OFF Controller (CZ-01ANA11P)........................................123
1.24 Schedule Timer (CZ-01ESW11P)........................................................126
1.25 Combining Different Types of Centralised Control Devices .................130
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1. Operation Flowcharts..........................................................................137
1.1 Indoor Unit Operation Flowchart ..........................................................137
1.2 Outdoor Unit Operation Flowchart........................................................142
2. Troubleshooting by Remote Controller ...............................................146
2.1 The INSPECTION / TEST Button.........................................................146
2.2 Self-diagnosis by Wired Remote Controller .........................................147
2.3 Self-diagnosis by Wireless Remote Controller.....................................148
2.4 Operation of The Remote Controller’s Inspection /
Test Operation Button ..........................................................................151
2.5 Remote Controller Service Mode .........................................................152
2.6 Remote Controller Self-Diagnosis Function
(Display of Malfunction Code) ..............................................................154
3. Troubleshooting ..................................................................................156
3.1 Indoor Unit: Error of External Protection Device ..................................156
3.2 Indoor Unit: PC Board Defect...............................................................157
3.3 Indoor Unit: Malfunction of Drain Level Control System (33H).............158

PACD011001C2
Table of Contents iii
3.4 Indoor Unit: Fan Motor (M1F) Lock, Overload......................................159
3.5 Indoor Unit: Malfunction of Swing Flap Motor (M1S)............................160
3.6 Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................161
3.7 Indoor Unit: Drain Level above Limit....................................................162
3.8 Indoor Unit: Malfunction of Capacity Determination Device.................163
3.9 Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe...............164
3.10 Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes................165
3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet.....................166
3.12 Indoor Unit: Malfunction of Thermostat Sensor
in Remote Controller ............................................................................167
3.13 Outdoor Unit: Actuation of Safety Device.............................................168
3.14 Outdoor Unit: PC Board Defect............................................................169
3.15 Outdoor Unit: Actuation of High Pressure Switch.................................170
3.16 Outdoor Unit: Actuation of Low Pressure Switch .................................171
3.17 Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................172
3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature.........................173
3.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air............174
3.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)...........175
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe..........176
3.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger....177
3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor ...........178
3.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor................179
3.25 Outdoor Unit: Malfunction of Oil Temperature Thermistor (R5T).........180
3.26 Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................181
3.27 Negative Phase, Open Phase..............................................................182
3.28 Malfunction of Transmission between Indoor Units..............................183
3.29 Malfunction of Transmission
between Remote Controller and Indoor Unit........................................184
3.30 Malfunction of Transmission between Outdoor Units...........................185
3.31 Malfunction of Transmission
between Master and Slave Remote Controllers...................................186
3.32 Malfunction of Transmission
between Indoor and Outdoor Units in the Same System.....................187
3.33 Excessive Number of Indoor Units.......................................................188
3.34 Address Duplication of Central Remote Controller...............................189
3.35 Refrigerant System not set, Incompatible Wiring/Piping......................190
3.36 Malfunction of System, Refrigerant System Address Undefined..........191
4. Failure Diagnosis for Inverter System.................................................192
4.1 Points of Diagnosis...............................................................................192
4.2 How to use the Monitor Switch on the Inverter PC Board....................193
5. Troubleshooting (Inverter)...................................................................194
5.1 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise...........................................................................194
5.2 Outdoor Unit: Inverter Instantaneous Over-Current.............................195
5.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload......196
5.4 Outdoor Unit: Inverter Stall Prevention, Compressor Lock ..................197
5.5 Outdoor Unit: Malfunction of Transmission
between Inverter and Control PC Board ..............................................198
5.6 Power Supply Insufficient or Instantaneous Failure.............................199

PACD011001C2
iv Table of Contents
5.7 Outdoor Unit: Inverter Over-Ripple Protection .....................................200
5.8 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise Sensor..............................................................201
6. Troubleshooting (OP: Central Remote Controller)..............................202
6.1 Malfunction of Transmission
between Central Remote Controller and Indoor Unit ...........................202
6.2 PC Board Defect ..................................................................................203
6.3 Malfunction of Transmission between Optional Controllers
for Centralised Control .........................................................................204
6.4 Improper Combination of Optional Controllers
for Centralised Control .........................................................................205
6.5 Address Duplication, Improper Setting.................................................206
7. Troubleshooting (OP: Schedule Timer)...............................................207
7.1 Malfunction of Transmission
between Central Remote Controller and Indoor Unit ...........................207
7.2 PC Board Defect ..................................................................................208
7.3 Malfunction of Transmission
between Optional Controllers for Centralised Control..........................209
7.4 Improper Combination of Optional Controllers
for Centralised Control .........................................................................210
7.5 Address Duplication, Improper Setting.................................................211
8. Troubleshooting (OP: Unified ON/OFF Controller) .............................212
8.1 Operation Lamp Blinks.........................................................................212
8.2 Display “Under Host Computer Integrate Control” Blinks
(Repeats Single Blink)..........................................................................213
8.3 Display “Under Host Computer Integrate Control” Blinks
(Repeats Double Blink) ........................................................................215
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1. Introduction .........................................................................................220
1.1 Introduction of the Series .....................................................................220
2. Outline.................................................................................................221
2.1 MX1R Series........................................................................................221
2.2 ME1R Series (Heat Recovery).............................................................222
2.3 Allowed Range of Indoor Unit and HR Box Connection.......................223
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1. Function ..............................................................................................226
1.1 Outdoor Unit Refrigerant System Diagram...........................................226
1.2 List of Safety Devices and Functional Parts Setting Values.................234
1.3 Flow of Refrigerant in Each Operation Mode (ME1R Series)...............236
1.4 Outline of Control (ME1R Series).........................................................241
1.5 Safety for Restart .................................................................................243

PACD011001C2
Table of Contents v
1.6 Equalized Oil Level Operation
(Equalized Oil Level between Twin Compressors)...............................245
1.7 Oil Return Operation ............................................................................246
1.8 Defrost..................................................................................................248
1.9 Pressure Equalization Control (ME1R Series) .....................................251
1.10 Frequency Limit Control by Pressure Equalization (ME1R Series)......252
1.11 HR Changeover Control (ME1R Series) ..............................................253
1.12 Pump Down Residual Operation..........................................................254
1.13 Step Down / Safety Control →Standby (Forced Thermostat OFF)
→Stop Due to Malfunction ..................................................................255
1.14 Control During Low Outdoor Air Temperature Cooling ........................258
1.15 Low Noise Control................................................................................260
1.16 Demand Control...................................................................................261
1.17 Compressor Capacity Control..............................................................262
1.18 Te / Tc Setting......................................................................................263
1.19 Gas Depletion Alarm............................................................................264
1.20 Drain Pump Control..............................................................................265
1.21 Oil Temperature Sensor (8 and 10 Hp only) ........................................267
1.22 Louver Control for Preventing Ceiling Dirt............................................268
1.23 Thermostat Sensor in Remote Controller.............................................269
1.24 Freeze Prevention................................................................................271
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1. Test Operation ....................................................................................274
1.1 Procedure and Outline .........................................................................274
1.2 When Power is Turned On...................................................................276
1.3 Outdoor Unit PC Board Ass’y...............................................................277
1.4 Setting Modes (MX1R Series)..............................................................281
1.5 Setting Modes (ME1R Series)..............................................................288
1.6 Sequential Start....................................................................................294
1.7 BMS Interface Adaptor for Outdoor Unit (MX1R Series)......................295
1.8 BMS Interface Adaptor for Outdoor Unit (ME1R Series)......................298
1.9 Cool / Heat Mode Selection (MX1R Series).........................................302
1.10 Cool / Heat Mode Switching (ME1R Series) ........................................309
1.11 Low Noise / Demand Operation (MX1R Series)...................................311
1.12 Low Noise Operation (ME1R Series) ...................................................313
1.13 Demand Control (ME1R Series)...........................................................314
1.14 Wiring Check Operation.......................................................................315
1.15 Indoor Field Setting..............................................................................316
1.16 Centralised Control Group No. Setting.................................................318
1.17 Setting of Master Remote Controller....................................................320
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1. Operation Flowcharts..........................................................................325
1.1 Indoor Unit Operation Flowchart ..........................................................325
1.2 Outdoor Unit Operation Flowchart........................................................330
2. Troubleshooting by Remote Controller ...............................................334
2.1 The INSPECTION / TEST Button.........................................................334
2.2 Self-diagnosis by Wired Remote Controller .........................................335
2.3 Self-diagnosis by Wireless Remote Controller.....................................336

PACD011001C2
vi Table of Contents
2.4 Operation of The Remote Controller’s Inspection /
Test Operation Button ..........................................................................339
2.5 Remote Controller Service Mode .........................................................340
2.6 Remote Controller Self-Diagnosis Function
(Display of Malfunction Code) ..............................................................342
3. Troubleshooting ..................................................................................344
3.1 Indoor Unit: Error of External Protection Device ..................................344
3.2 Indoor Unit: PC Board Defect...............................................................345
3.3 Indoor Unit: Malfunction of Drain Level Control System (33H).............346
3.4 Indoor Unit: Fan Motor (M1F) Lock, Overload......................................347
3.5 Indoor Unit: Malfunction of Swing Flap Motor (M1S)............................348
3.6 Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................349
3.7 Indoor Unit: Drain Level above Limit....................................................350
3.8 Indoor Unit: Malfunction of Capacity Determination Device.................351
3.9 Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe...............352
3.10 Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes................353
3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet.....................354
3.12 Indoor Unit: Malfunction of Thermostat Sensor
in Remote Controller ............................................................................355
3.13 Outdoor Unit: Actuation of Safety Device.............................................356
3.14 Outdoor Unit: PC Board Defect............................................................357
3.15 Outdoor Unit: Actuation of High Pressure Switch.................................358
3.16 Outdoor Unit: Actuation of Low Pressure Switch .................................359
3.17 Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................360
3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature.........................361
3.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air............362
3.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)...........363
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe..........364
3.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger....365
3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor ...........366
3.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor................367
3.25 Outdoor Unit: Malfunction of Oil Temperature Thermistor (R5T).........368
3.26 Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................369
3.27 Negative Phase, Open Phase..............................................................370
3.28 Malfunction of Transmission Between Indoor Units.............................371
3.29 Malfunction of Transmission
Between Remote Controller and Indoor Unit........................................372
3.30 Malfunction of Transmission Between Outdoor Units ..........................373
3.31 Malfunction of Transmission
Between Master and Slave Remote Controllers ..................................374
3.32 Malfunction of Transmission
Between Indoor and Outdoor Units in the Same System.....................375
3.33 Excessive Number of Indoor Units.......................................................376
3.34 Address Duplication of Central Remote Controller...............................377
3.35 Refrigerant System not set, Incompatible Wiring/Piping......................378
3.36 Malfunction of System, Refrigerant System Address Undefined..........379
4. Failure Diagnosis for Inverter System.................................................380
4.1 Points of Diagnosis...............................................................................380
4.2 How to use the Monitor Switch on the Inverter PC Board....................381

PACD011001C2
Table of Contents vii
5. Troubleshooting (Inverter)...................................................................382
5.1 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise...........................................................................382
5.2 Outdoor Unit: Inverter Instantaneous Over-Current.............................383
5.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload......384
5.4 Outdoor Unit : Inverter Stall Prevention, Compressor Lock ................385
5.5 Outdoor Unit: Malfunction of Transmission
between Inverter and Control PC Board ..............................................386
5.6 Power Supply Insufficient or Instantaneous Failure.............................387
5.7 Outdoor Unit: Inverter Over-Ripple Protection .....................................388
5.8 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise Sensor..............................................................389
6. Troubleshooting (OP: Central Remote Controller)..............................390
6.1 Malfunction of Transmission
between Central Remote Controller and Indoor Unit ...........................390
6.2 PC Board Defect ..................................................................................391
6.3 Malfunction of Transmission between Optional Controllers
for Centralised Control .........................................................................392
6.4 Improper Combination of Optional Controllers
for Centralised Control .........................................................................393
6.5 Address Duplication, Improper Setting.................................................394
7. Troubleshooting (OP: Schedule Timer)...............................................395
7.1 Malfunction of Transmission
between Central Remote Controller and Indoor Unit ...........................395
7.2 PC Board Defect ..................................................................................396
7.3 Malfunction of Transmission between Optional Controllers
for Centralised Control .........................................................................397
7.4 Improper Combination of Optional Controllers
for Centralised Control .........................................................................398
7.5 Address Duplication, Improper Setting.................................................399
8. Troubleshooting (OP: Unified ON/OFF Controller) .............................400
8.1 Operation Lamp Blinks.........................................................................400
8.2 Display “Under Host Computer Integrate Control” Blinks
(Repeats Single Blink)..........................................................................401
8.3 Display “Under Host Computer Integrate Control” Blinks
(Repeats Double Blink) ........................................................................403
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1. Product Outline ...................................................................................408
1.1 Year 2001 Models Using New Refrigerant...........................................408
1.2 Outline of New Series Products ...........................................................409
1.3 Model Configuration and Combination.................................................411
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1. Outdoor Unit Refrigerant System Diagram .........................................414

PACD011001C2
viii Table of Contents
1.1 Outdoor Unit Refrigerant System Diagram...........................................414
1.2 Flow of Refrigerant in Each Operating Mode .......................................417
2. List of Safety Device and Function Parts Setting Value......................421
2.1 Outdoor Unit.........................................................................................421
2.2 Indoor Unit............................................................................................422
3. Outline of Control................................................................................425
3.1 Outdoor Unit.........................................................................................425
3.2 Indoor Unit............................................................................................445
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1. Test Operation ....................................................................................452
1.1 Procedure and Outline .........................................................................452
1.2 Operation When Power is Turned On..................................................454
1.3 Outdoor Unit PC Board Ass’y...............................................................455
1.4 Setting Modes ......................................................................................457
1.5 Cool / Heat Mode Selection..................................................................464
1.6 Low Noise Operation............................................................................469
1.7 Demand Control...................................................................................470
1.8 Sequential Start....................................................................................471
1.9 Wiring Check Operation.......................................................................472
1.10 Additional Refrigerant Charge Operation.............................................473
1.11 Refrigerant Recovery Mode .................................................................474
1.12 Indoor Field Setting..............................................................................475
1.13 Centralised Control Group No. Setting.................................................477
1.14 Contents of Control Modes...................................................................479
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1. Operation Flowcharts..........................................................................483
1.1 Indoor Unit Operation Flowchart ..........................................................483
2. Troubleshooting by Remote Controller ...............................................488
2.1 The INSPECTION / TEST Button.........................................................488
2.2 Self-diagnosis by Wired Remote Controller .........................................489
2.3 Self-diagnosis by Wireless Remote Controller.....................................490
2.4 Operation of The Remote Controller’s Inspection /
Test Operation Button ..........................................................................493
2.5 Remote Controller Service Mode .........................................................494
2.6 Remote Controller Self-Diagnosis Function
(Display of Malfunction Code) ..............................................................496
3. Troubleshooting ..................................................................................498
3.1 Indoor Unit: Error of External Protection Device ..................................498
3.2 Indoor Unit: PC Board Defect...............................................................499
3.3 Indoor Unit: Malfunction of Drain Level Control System (33H).............500
3.4 Indoor Unit: Fan Motor (M1F) Lock, Overload......................................501
3.5 Indoor Unit: Malfunction of Swing Flap Motor (M1S)............................502
3.6 Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................503
3.7 Indoor Unit: Drain Level above Limit....................................................504
3.8 Indoor Unit: Malfunction of Capacity Determination Device.................505
3.9 Indoor Unit: Malfunction of Thermistor (R2T) for Liquid Pipe...............506
3.10 Indoor Unit: Malfunction of Thermistor (R3T) for Gas Pipes................507

PACD011001C2
Table of Contents ix
3.11 Indoor Unit: Malfunction of Thermistor (R1T) for Air Inlet.....................508
3.12 Indoor Unit: Malfunction of Thermostat Sensor
in Remote Controller ............................................................................509
3.13 Outdoor Unit: Actuation of Safety Device.............................................510
3.14 Outdoor Unit: PC Board Defect............................................................511
3.15 Outdoor Unit: Actuation of High Pressure Switch.................................512
3.16 Outdoor Unit: Actuation of Low Pressure Switch .................................513
3.17 Outdoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (Y1E)........................................................514
3.18 Outdoor Unit: Abnormal Discharge Pipe Temperature.........................515
3.19 Outdoor Unit: Malfunction of Thermistor (R1T) for Outdoor Air............516
3.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T)...........517
3.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe..........518
3.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger....519
3.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor ...........520
3.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor................521
3.25 Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................522
3.26 Negative Phase, Open Phase..............................................................523
3.27 Malfunction of Transmission Between Indoor Units.............................524
3.28 Malfunction of Transmission
Between Remote Controller and Indoor Unit........................................525
3.29 Malfunction of Transmission Between Outdoor Units ..........................526
3.30 Malfunction of Transmission
Between Master and Slave Remote Controllers ..................................527
3.31 Malfunction of Transmission
Between Indoor and Outdoor Units in the Same System.....................528
3.32 Excessive Number of Indoor Units.......................................................529
3.33 Address Duplication of Central Remote Controller...............................530
3.34 Refrigerant System not Set, Incompatible Wiring/Piping......................531
3.35 Malfunction of System, Refrigerant System Address Undefined..........532
4. Failure Diagnosis for Inverter System.................................................533
4.1 Points of Diagnosis...............................................................................533
4.2 How to Use The Monitor Switch on The Inverter PC Board.................534
5. Troubleshooting (Inverter)...................................................................535
5.1 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise...........................................................................535
5.2 Outdoor Unit: Inverter Instantaneous Over-Current.............................536
5.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload......537
5.4 Outdoor Unit: Inverter Stall Prevention, Compressor Lock ..................538
5.5 Outdoor Unit: Malfunction of Transmission
Between Inverter and Control PC Board..............................................539
5.6 Power Supply Insufficient or Instantaneous Failure.............................540
5.7 Outdoor Unit: Inverter Over-Ripple Protection .....................................541
5.8 Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise Sensor..............................................................542
6. Troubleshooting (OP: Central Remote Controller)..............................543
6.1 Malfunction of Transmission
Between Central Remote Controller and Indoor Unit...........................543
6.2 PC Board Defect ..................................................................................544
6.3 Malfunction of Transmission
Between Optional Controllers for Centralised Control..........................545

PACD011001C2
xTable of Contents
6.4 Improper Combination of Optional Controllers
for Centralised Control ........................................................................546
6.5 Address Duplication, Improper Setting.................................................547
7. Troubleshooting (OP: Schedule Timer)...............................................548
7.1 Malfunction of Transmission Between Central
Remote Controller and Indoor Unit.......................................................548
7.2 PC Board Defect ..................................................................................549
7.3 Malfunction of Transmission
Between Optional Controllers for Centralised Control..........................550
7.4 Improper Combination of Optional Controllers
for Centralised Control .........................................................................551
7.5 Address Duplication, Improper Setting.................................................552
8. Troubleshooting (OP: Unified ON/OFF Controller) .............................553
8.1 Operation Lamp Blinks.........................................................................553
8.2 Display “Under Host Computer Integrate Control” Blinks
(Repeats Single Blink)..........................................................................554
8.3 Display “Under Host Computer Integrate Control” Blinks
(Repeats Double Blink) ........................................................................556
3DUW#8 6SHFLDO#6HUYLFH#0RGH11111111111111111111111111111111111111111111111111111 88:
1. Backup and Emergency Operation.....................................................558
1.1 Backup and Emergency Operation ......................................................558
2. Pump Down Operation........................................................................560
2.1 Pump Down Operation.........................................................................560
$SSHQGL[1111111111111111111111111111111111111111111111111111111111111111111111111111111111111 894
1. Wiring Diagrams (Outdoor Unit)..........................................................562
1.1 MX1 Series...........................................................................................562
1.2 ME1 Series (Heat Recovery)................................................................564
1.3 MX1R Series........................................................................................566
1.4 ME1R Series (Heat Recovery).............................................................568
1.5 MA1R Series (Combination).................................................................570
2. Wiring Diagrams (Indoor Unit).............................................................572
2.1 2-Way Cassette Type...........................................................................572
2.2 4-Way Cassette Type...........................................................................574
2.3 Corner Type .........................................................................................575
2.4 Built-In Type .........................................................................................576
2.5 Ducted Type.........................................................................................578
2.6 Ceiling Type .........................................................................................580
2.7 Wall Type .............................................................................................581
2.8 Floor Standing Type / Concealed Floor Standing Type .......................582
2.9 Small Duct Type...................................................................................583
3. Characteristics ....................................................................................584
3.1 R407C Characteristics .........................................................................584
3.2 Thermistor Resistance / Temperature Characteristics.........................585
3.3 Pressure Sensor...................................................................................587
3.4 Method of Replacing The Inverter’s Power Transistors and
Diode Modules .....................................................................................588
4. Precaution...........................................................................................590
4.1 PC Boards and Remote Controller’s Mode No.....................................590

PACD011001C2
Table of Contents xi
5. Typical Wiring Mistakes ......................................................................591
5.1 Typical Wiring Mistakes........................................................................591
6. Interface Adaptor.................................................................................598
6.1 BMS Interface Adaptor for Unified Group (KRP2A51·52) ....................598
6.2 BMS Interface Adaptor for Individual and Unified Control
(KRP4A51 / KRP4A52 / KRP4A53)......................................................603
6.3 Signal Output Adaptor PCB for Optional Accessory
(KRP1B61 / KRP1B2 / KRP1B3)..........................................................606
6.4 Interface Adaptor for Urban Split Series (CZ-102AP11P)....................608
6.5 Interface Adaptor for Other Air Conditioners (CZ-103AP11P) .............610
6.6 BMS Interface Adaptor for Outdoor Units
(DTA104A51 · DTA104A52).................................................................613
6.7 BMS Interface Adaptor (DCS302A52)..................................................616
7. Precautions in Servicing The Models with New-type Refrigerant .......620
7.1 Tools Required.....................................................................................620
7.2 Notes for Work Procedures..................................................................621

PACD011001C2
xii Table of Contents

PACD011001C2 Introduction
xiii
1. Introduction
1.1 Safety Cautions
Cautions and
Warnings
„Be sure to read the following safety cautions before conducting repair work.
„The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are
especially important since they can lead to death or serious injury if they are not followed closely. The
“Caution” items can also lead to serious accidents under some conditions if they are not followed.
Therefore, be sure to observe all the safety caution items described below.
„About the pictograms
This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
This symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
This symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
„After the repair work is complete, be sure to conduct a test operation to ensure that the equipment
operates normally, and explain the cautions for operating the product to the customer
1.1.1 Cautions in Repair Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling
the equipment for a repair.
Working on the equipment that is connected to a power supply can cause an electrical
shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the
circuits, do not touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging
refrigerant gas.
The refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the welded
section, release the refrigerant gas completely at a well-ventilated place first.
If there is a gas remaining inside the compressor, the refrigerant gas or refrigerating
machine oil discharges when the pipe is disconnected, and it can cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas
can generate toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to theelectrical components of the
outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work.
A charged capacitor can cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the power
cable plug.
Plugging or unplugging the power cable plug to operate the equipment can cause an
electrical shock or fire.

Introduction PACD011001C2
xiv
1.1.2 Cautions Regarding Products after Repair
Caution
Do not repair the electrical components with wet hands.
Working on the equipment with wet hands can cause an electrical shock.
Do not clean the air conditioner by splashing water.
Washing the unit with water can cause an electrical shock.
Be sure to provide the grounding when repairing the equipment in a humid or wet place,
to avoid electrical shocks.
Be sure to turn off the power switch and unplug the power cable when cleaning the
equipment.
The internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it.
The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down sufficiently before
conducting repair work.
Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place.
Using the welder in an enclosed room can cause oxygen deficiency.
Warning
Be sure to use parts listed in the service parts list ofthe applicable model and appropriate
tools to conduct repair work. Never attempt to modify the equipment.
The use of inappropriate parts or tools can cause an electrical shock, excessive heat
generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient
strength to withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not
conducted securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.
Incorrect use of the installation frame and improper installation can cause the equipment
to fall, resulting in injury.
For integral units only
Be sure to install the product securely in the installation frame mounted on a window
frame.
If the unit is not securely mounted, it can fall and cause injury.
For integral units only
Be sure to use an exclusive power circuit for the equipment, and follow the technical
standards related to the electrical equipment, the internal wiring regulations and the
instruction manual for installation when conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical
shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units.
Make the connections securely and route the cable properly so that there is no force
pulling the cable at the connection terminals.
Improper connections can cause excessive heat generation or fire.

PACD011001C2 Introduction
xv
1.1.3 Inspection after Repair
When connecting the cable between the indoor and outdoor units, make sure that the
terminal cover does not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an
electrical shock, excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire.
Placing heavy items on the power cable, and heating or pulling the power cable can
damage the cable.
Do not mix air or gas other than the specified refrigerant (R22) in the refrigerant system.
If air enters the refrigerating system, an excessively high pressure results, causing
equipment damage and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the
refrigerant. After charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform
pump-down and close the service valve, to prevent the refrigerant gas from leaking into
the room. The refrigerant gas itself is harmless, but it can generate toxic gases when it
contacts flames, such as fan and other heaters, stoves and ranges.
When replacing the coin battery in the remote controller, be sure to disposed of the old
battery to prevent children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
Warning
Caution
Installation ofa leakage breaker is necessary insome cases depending onthe conditions
of the installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of combustible gas
leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly.
If the packing and seal are not installed properly, water can enter the room and wet the
furniture and floor.
For integral units only
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert the plug
into a power outlet all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to replace
them.
Damaged cable and wires can cause an electrical shock, excessive heat generation or
fire.
Do not use a joined power cable or extension cable, or share the same power outlet with
other electrical appliances, since it can cause an electrical shock, excessive heat
generation or fire.
Caution
Check to see if the parts and wires are mounted and connected properly, and if the
connections at the soldered or crimped terminals are secure.
Improper installation and connections can cause excessive heat generation, fire or an
electrical shock.

Introduction PACD011001C2
xvi
If the installation platform or frame has corroded, replace it.
Corroded installation platform or frame can cause the unit to fall, resulting in injury.
Check the grounding, and repair it if the equipment is not properly grounded.
Improper grounding can cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure that the
resistance is 1 Mohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture and floor.
Caution

PACD011001C2 Introduction
xvii
1.2 Survey of Possible UM Outdoor Units
UM outdoor units are available in 5 to 30HP format to precisely meet the needs of any building size.
Modular design enables UM outdoor units to be joined together in rows with an outstanding degree of
uniformity. The design of the UM Inverter & heat recovery series is sufficiently compact to be taken to the
top of building in a commercial elevator, overcoming site transportation problems.
Refrigerant Type Outdoor Unit Maximum n° of Connectable indoor units Range of Total
Capacity Index
813 16 20 30 32
R-407C
Inverter CU-5MX1SPP {62.5~162.5 CU-8MX1SPP {100~260
CU-10MX1SPP {125~325
Heat Recovery CU-8ME1XPK {100~260
CU-10ME1XPK {125~325
Combination Inverter
PA-16MA1XPK {200~520
PA-18MA1XPK {225~585
PA-20MA1XPK {250~650
PA-24MA1XPK {300~780
PA-26MA1XPK {325~845
PA-28MA1XPK {350~910
PA-30MA1XPK {375~975
R-22 Inverter CU-5MX1SPE {62.5~162.5
CU-8MX1SPE {100~260
CU-10MX1SPE {125~325
Heat Recovery CU-8ME1XNA {100~260
CU-10ME1XNA {125~325

Introduction PACD011001C2
xviii
1.3 Survey of Possible UM Indoor Units
Refrigerant Type Model Name Size
20 25 32 40 50 63 80 100 125 200 250
R-407C
R-22
2-Way Cassette Type CS-LMHPP {{{{{{{—{——
4-Way Cassette Type CS-UMHPP {{{{{{{{{——
Corner Type CS-DM1HPK — {{{—{—————
Built-in Type CS-FMHPP {{{{{{{{{——
Small Duct Type CS-NM1HPP {{—————————
Ducted Type CS-EMHPK — — — {{{{{{{{
Ceiling Type CS-TMJPL — — {——{—{———
Wall Type CS-KM1HPK {{{{{{—————
Floor Standing Type CS-PM1HPK {{{{{{—————
Cancealed Floor
Standing Type CS-RM1HPK {{{{{{—————
Capacity Index 20 25 31.25 40 50 62.5 80 100 125 200 250
eg. Selected indoor units: CS-25LMHPP + CS-100LMHPP + CS-200EMHPK+ CS-40FMHPP
Connection ratio: 25 + 100 + 200 + 40 = 365
Possible outdoor unit: PA-16MA1XPK

PACD011001C2 Introduction
xix
1.4 Nomenclature
1.4.1 Outdoor Unit
CU 8 XM 1 S P P
Refrigerant etc.
K~P : R-407C
A~E : R-22
Destination
P : Europe
Power supply
S, X : 3φ, 400V, 50Hz
M : Urban Multi (UM)
Type
X : Inverter heat pump
E : Heat recovery inverter
A : Combination inverter : main unit
B : Combination inverter : sub unit
Capacity
5 : 5HP
8 : 8HP
10 : 10HP
16 : 16HP
20 : 20HP
24 : 24HP
26 : 26HP
28 : 28HP
30 : 30HP
CU : Outdoor Unit
CS : Indoor Unit
CZ : Accessories
PA : Combinationed Outdoor Unit (M201)
( )