Daikin AC VRV III R-410A Heat Pump / Heat Recovery 60Hz – Service Manual

This Service Manual is for R-410A Heat Pump/Heat Recovery 60Hz

 

Indoor Units

Ceiling mounted cassette type (Multi flow)
FXFQ12MVJU ; FXFQ18MVJU ; FXFQ24MVJU ; FXFQ30MVJU ; FXFQ36MVJU
4 way ceiling-mounted cassette unit (2’×2’)
FXZQ07M7 ; FXZQ09M7 ; FXZQ12M7 ; FXZQ18M7
Slim ceiling mounted duct type
FXDQ07MVJU ; FXDQ09MVJU ; FXDQ12MVJU ; FXDQ18MVJU ; FXDQ24MVJU
Ceiling mounted built-in type
FXSQ12MVJU ; FXSQ18MVJU ; FXSQ24MVJU ; FXSQ30MVJU ; FXSQ36MVJU ; FXSQ48MVJU
Ceiling mounted duct type
FXMQ30MVJU ; FXMQ36MVJU ; FXMQ48MVJU
Ceiling suspended type
FXHQ12MVJU ; FXHQ24MVJU ; FXHQ36MVJU
Wall mounted type
FXAQ07MVJU ; FXAQ09MVJU ; FXAQ12MVJU ; FXAQ18MVJU ; FXAQ24MVJU
Floor standing type
FXLQ12MVJU ; FXLQ18MVJU ; FXLQ24MVJU
Concealed floor standing type
FXNQ12MVJU ; FXNQ18MVJU ; FXNQ24MVJU
BS Units
BSVQ36PVJU ; BSVQ60PVJU

 

Outdoor Units

RXYQ72PYDN ; RXYQ96PYDN ; RXYQ120PYDN ; RXYQ144PYDN ; RXYQ240PYDN ; REYQ72PYDN ; REYQ96PYDN ; REYQ120PYDN ; REYQ144PYDN ; REYQ1240PYDN ; RXYQ72PTJU ; RXYQ96PTJU ; RXYQ120PTJU ; RXYQ168PTJ ; RXYQ240PTJ ; REYQ72PTJU ; REYQ96PTJU ; REYQ120PTJU ; REYQ144PTJU ; REYQ168PTJU ; REYQ240PTJU ; RXYQ144PTJU

 

CONTENTS:

  • 1. Introduction … vii
  • 1.1 Safety Considerations …vii
  • 1.2 PREFACE …xiii
  • General Information1

  • 1. Model Names of Indoor/O
    utdoor Units … page 2
  • 2. External Appearance … page 3
  • 2.1 Indoor Units … page 3
  • 2.2 Outdoor Units … page 4
  • 3. Combination of Outdoor Units … page 5
  • 4. Model Selection … page 6
  • VRVIII R-410A Heat Pump 60Hz9

  • 1. Specifications … page 11
  • 1.1 Outdoor Units … page 11
  • 2. Refrigerant Circuit … page 17
  • 2.1 RXYQ72P, 96P, 120P … page 17
  • 2.2 RXYQ144PTJU … page 18
  • 3. Functional Parts Layout RXYQ72P,
    96P, 120P … page 21
  • 3.1 RXYQ144PTJU … page 21
  • 4. Refrigerant Flow for Each
    Operation Mode … page 23
  • 5. Function General … page 41
  • 5.1 Symbol … page 41
  • 5.2 Operation Mode … page 42
  • 6. Basic Control … page 43
  • 6.1 Normal Operation … page 43
  • 6.2 Compressor PI Control … page 44
  • 6.3 Electronic Expansion Valve
    PI Control … page 47
  • 6.4 Step Control of Outdoor Unit
    Fans … page 47
  • 6.5 Outdoor Unit Fan Control in
    Cooling Operation … page 48
  • 6.6 Heat Exchanger Control … page 49
  • 7. Special Control … page 50
  • 7.1 Startup Control … page 50
  • 7.2 Large Capacity Start Up Control
    (Heating) … page 51
  • 7.3 Oil Return Operation … page 52
  • 7.4 Defrost Operation … page 56
  • 7.5 Pump-down Residual Operation … page 58
  • 7.6 Standby … page 60
  • 7.7 Stopping Operation … page 61
  • 8. Protection Contro … page 63
  • 8.1 High Pressure Protection Control … page 63
  • 8.2 Low Pressure Protection Control … page 65
  • 8.3 Discharge Pipe Protection Control … page 67
  • 8.4 Inverter Protection Control … page 68
  • 8.5 STD Compressor Overload Protection … page 70
  • 9. Other Control … page 71
  • 9.1 Backup Operation … page 71
  • 9.2 Demand Operation … page 71
  • 9.3 Heating Operation Prohibition … page 71
  • 10.Test Operation … page 72
  • 10.1 Installation Process … page 72
  • 10.2 Procedure and Outline … page 73
  • 10.3 Operation when Power is Turned On … page 91
  • 11.Outdoor Unit PC Board Layout … page 93
  • 12.Field Settings … page 94
  • 12.1 Field Settings on the
    Outdoor Unit … page 94
  • VRVIII R-410A Heat Recovery 60Hz119

  • 1. Specifications … page 121
  • 1.1 Outdoor Units … page 121
  • 1.2 BS Units … page 126
  • 2. Refrigerant Circuit … page 128
  • 2.1 REYQ72, 96, 120PYDN, PTJU … page 128
  • 2.2 REYQ144PTJU … page 130
  • 2.3 REMQ72PYDN, PTJU (Multi 6ton) … page 132
  • 2.4 REMQ96, 120PYDN, PTJU (Multi
    8, 10ton) … page 134
  • 2.5 BS Unit Functional Parts … page 136
  • 3. Functional Parts Layout … page 137
  • 3.1 REYQ72P, 96P, 120P … page 137
  • 3.2 REYQ144PTJU … page 138
  • 3.3 REMQ72P … page 139
  • 3.4 REMQ96P, 120P … page 140
  • 4. Refrigerant Flow for Each
    Operation Mode … page 141
  • 5. Function General … page 185
  • 5.1 Symbol … page 185
  • 5.2 Operation Mode … page 187
  • 6. Basic Control … page 188
  • 6.1 Normal Operation … page 188
  • 6.2 Compressor PI Control … page 189
  • 6.3 Electronic Expansion Valve
    PI Control … page 193
  • 6.4 Step Control of Outdoor
    Unit Fans … page 194
  • 6.5 Outdoor Unit Fan Control in
    Cooling Operation … page 194
  • 6.6 Heat Exchanger Control … page 195
  • 7. Special Control … page 197
  • 7.2 Large Capacity Start Up Control
    (Heating) … page 198
  • 7.3 Oil Return Operation … page 199
  • 7.4 Defrost Operation … page 203
  • 7.5 Pump-down Residual Operation … page 205
  • 7.6 Standby … page 207
  • 7.7 Stopping Operation … page 208
  • 8. Protection Control … page 210
  • 8.1 High Pressure Protection Control … page 210
  • 8.2 Low Pressure Protection Control … page 211
  • 8.3 Discharge Pipe Protection Control … page 213
  • 8.4 Inverter Protection Control … page 214
  • 8.5 STD Compressor Overload
    Protection … page 216
  • 9. Other Control … page 218
  • 9.1 Backup Operation … page 218
  • 9.2 Demand Operation … page 218
  • 9.3 Heating Operation Prohibition … page 218
  • 10.Test Operation … page 219
  • 10.1 Installation Process … page 219
  • 10.2 Procedure and Outline … page 219
  • 10.3 Operation when Power is
    Turned On … page 238
  • 11.Outdoor Unit PC Board Layout … page 240
  • 12.Field Setting … page 241
  • 12.1 Field Setting from Outdoor
    Unit … page 241
  • Indoor Unit … page 269

  • 1. Specifications … page 270
  • 2. Refrigerant Circuit … page 284
  • 3. Operation Flow Chart … page 285
  • 4. Thermostat Sensor in Remote
    Controller … page 287
  • 4.1 Thermostat Control While in Normal
    Operation … page 289
  • 4.2 Thermostat Control in Dry Operation … page 289
  • 4.3 Thermostat Control with Operation
    Mode Set to AUTO … page 290
  • 5. Drain Pump Control … page 291
  • 5.1 When the Float Switch is Tripped
    while the Cooling Thermostat is ON: … page 291
  • 5.2 When the Float Switch is Tripped
    while the Cooling Thermostat is OFF: … page 291
  • 5.3 When the Float Switch is Tripped
    During Heating Operation: … page 292
  • 5.4 When the Float Switch is Tripped and “AF”
    is Displayed on the Remote Controller: … page 292
  • 6. Control of Electronic
    Expansion Valve … page 293
  • 7. Freeze Prevention … page 294
  • 8. Heater Control (Optional PC Board
    KRP1B … is required.) … page 295
  • 9. List of Louver Operations … page 296
  • 10.Hot Start Control (In Heating
    Operation Only) … page 297
  • 11.Louver Control for Preventing
    Ceiling Dirt … page 298
  • 12.Field Setting … page 299
  • 12.1 Field Setting from
    Remote Controller … page 299
  • Troubleshooting … page 315

  • 1. Symptom-based Troubleshooting … page 318
  • 2. 2. Troubleshooting by Remote
    Controller … page 321
  • 2.1 The INSPECTION / TEST Button … page 321
  • 2.2 Self-diagnosis by Wired R
    emote Controller … page 322
  • Controller … page 321
  • 2.3 Self-diagnosis by Wireless
    Remote Controller … page 323
  • 2.4 Inspection Mode … page 326
  • 2.5 Remote Controller Service Mode … page 327
  • 2.6 Test Run Mode … page 329
  • 2.7 Remote Controller Self-
    Diagnosis Function … page 329
  • 3. Troubleshooting by Indication on
    the Remote Controller … page 336
  • 3.1 A0 Indoor Unit: Error of External
    Protection Device … page 336
  • 3.2 A1 Indoor Unit: PC Board Defect … page 337
  • 3.3 A3 Indoor Unit: Malfunction of
    Drain Level Control System (S1L) … page 338
  • 3.4 A6 Indoor Unit: Fan Motor (M1F)
    Lock, Overload … page 340
  • 3.5 A7 Indoor Unit: Malfunction of
    Louver Motor (M1S) … page 344
  • 3.6 A9 Indoor Unit: Electronic Expansion
    Valve Malfunction / Dust Clogging … page 346
  • 3.7 AF Indoor Unit: Drain Level
    above Limit … page 350
  • 3.8 AJ Indoor Unit: Malfunction of
    Capacity Determination Device … page 351
  • 3.9 C4 Indoor Unit: Malfunction of
    Thermistor (R2T) for Heat Exchanger … page 352
  • 3.10 C5 Indoor Unit: Malfunction of
    Thermistor (R3T) for Gas Pipes … page 353
  • 3.11 C9 Indoor Unit: Malfunction of
    Thermistor (R1T) for Suction Air … page 354
  • 3.12 CJ Indoor Unit: Malfunction of
    Thermostat Sensor in Remote Controller … page 355
  • 3.13 E1 Outdoor Unit:
    PC Board Defect … page 356
  • 3.14 E2 Outdoor Unit: Detection of
    ground leakage by leak detection PC board ass’y … page 357
  • 3.15 E3 Outdoor Unit: Actuation of
    High Pressure Switch … page 359
  • 3.16 E4 Outdoor Unit: Actuation of
    Low Pressure Sensor … page 361
  • 3.17 E5 Outdoor Unit: Inverter
    Compressor Motor Lock … page 363
  • 3.18 E6 Outdoor Unit: STD Compressor
    Motor Overcurrent/Lock … page 365
  • 3.19 E7 Outdoor Unit: Malfunction of
    Outdoor Unit Fan Motor … page 367
  • 3.20 E9 Outdoor Unit: Malfunction of
    Moving Part of Electronic Expansion Valve
    (Y1E~Y5E) … page 370
  • 3.21 F3 Outdoor Unit: Abnormal
    Discharge Pipe Temperature … page 372
  • 3.22 F6 Outdoor Unit: Refrigerant
    Overcharged … page 374
  • 3.23 H7 Outdoor Unit: Abnormal Outdoor
    Fan Motor Signal … page 375
  • 3.24 H9 Outdoor Unit: Malfunction of
    Thermistor (R1T) for Outdoor Air … page 377
  • 3.25 J2 Outdoor Unit: Current Sensor
    Malfunction … page 378
  • 3.26 J3 Outdoor Unit: Malfunction of
    Discharge Pipe Thermistor (R31, 32T) … page 380
  • 3.27 J4 Outdoor Unit: Malfunction of
    Temperature Sensor for Heat Exchanger Gas
    (R2T or R11T) … page 381
  • 3.28 J5 Outdoor Unit: Malfunction of
    Thermistor (R8T or R10T) Suction Pipe … page 382
  • 3.29 J6 Outdoor Unit: Malfunction of
    Thermistor (R4T or R12T) for Outdoor Unit
    Heat Exchanger … page 383
  • 3.30 J7 Outdoor Unit: Malfunction of
    Liquid Pipe Thermistor 1 (R6T), (R9T) or (R14T) … page 384
  • 3.31 J8 Outdoor Unit: Malfunction
    of Liquid Pipe Thermistor 2 (R7T or R15T) … page 385
  • 3.32 J9 Outdoor Unit: Malfunction
    of Subcooling Heat Exchanger Gas Pipe Thermistor
    (R5T or R13T) … page 386
  • 3.33 JA Outdoor Unit: Malfunction
    of High Pressure Sensor … page 387
  • 3.34 JC Outdoor Unit: Malfunction
    of Low Pressure Sensor … page 389
  • 3.35 L1 Outdoor Unit: Defective
    Inverter PC Board … page 391
  • 3.36 L4 Outdoor Unit: Malfunction of
    Inverter Radiating Fin Temperature Rise … page 393
  • 3.37 L5 Outdoor Unit: Momentary Overcurrent
    of Inverter Compressor … page 396
  • 3.38 L8 Outdoor Unit: Momentary Overcurrent
    of Inverter Compressor … page 398
  • 3.39 L9 Outdoor Unit: Inverter Compressor
    Starting Failure … page 400
  • 3.40 LC Outdoor Unit: Malfunction of
    Transmission between Inverter and Control
    PC Board … page 403
  • 3.41 P1 Outdoor Unit: Inverter Over-
    Ripple Protection … page 406
  • 3.42 P4 Outdoor Unit: Malfunction of
    Inverter Radiating Fin Temperature Rise Sensor … page 408
  • 3.43 PJ Outdoor Unit: Faulty Field
    Setting after Replacing Main PC Board or Faulty
    Combination of PC Board … page 410
  • 3.44 U0 Outdoor Unit: Gas
    Shortage Alert … page 412
  • 3.45 U1 Reverse Phase, Open Phase … page 414
  • 3.46 U2 Outdoor Unit: Power Supply
    Insufficient or Instantaneous Failure … page 415
  • 3.47 U3 Outdoor Unit: Check Operation
    not Executed … page 418
  • 3.48 U4 Malfunction of Transmission
    between Indoor Units … page 419
  • 3.49 U5 Indoor Unit: Malfunction of
    Transmission between Remote Controller and
    Indoor Unit … page 424
  • 3.50 U7 Outdoor Unit: Transmission
    Failure (Across Outdoor Units) … page 425
  • 3.51 U8 Indoor Unit: Malfunction of
    Transmission between Main and Sub Remote
    Controllers … page 431
  • 3.52 U9 Indoor Unit: Malfunction of
    Transmission between Indoor and Outdoor
    Units in the Same System … page 432
  • 3.53 UA Improper Combination of Indoor
    and Outdoor Units, Indoor Units and Remote
    Controller … page 433
  • 3.54 UC Address Duplication of Centralized
    Controller … page 439Unit … page 440
  • 3.55 UE Malfunction of Transmission between
    Centralized Controller and Indoor Unit … page 440
  • 3.56 UF System is not Set yet … page 443
  • 3.57 UH Malfunction of System, Refrigerant
    System Address Undefined … page 444
  • 4. Troubleshooting (OP: Central Remote
    Controller) … page 446
  • 4.1 M1 PC Board Defect … page 446
  • 4.2 M8 Malfunction of Transmission between
    Optional Controllers for Centralized Control … page 447
  • 4.3 MA Improper Combination of Optional
    Controllers for Centralized Control … page 449
  • 4.4 MC Address Duplication, Improper
    Setting … page 451
  • 5. Troubleshooting (OP: Unified ON/OFF
    Controller) … page 453
  • 5.1 Operation Lamp Blinks … page 453
  • 5.2 Display [Under Centralized Control]
    Blinks (Repeats Single Blink) … page 455
  • 5.3 Display [Under Centralized Control]
    Blinks (Repeats Double Blink) … page 458
  • Appendix … page 473

  • 1. Piping Diagrams … page 474
  • 1.1 Outdoor Unit … page 474
  • 1.2 Indoor Unit … page 484
  • 1.3 BS Unit … page 486
  • 2. Wiring Diagrams for Reference … page 487
  • 2.1 Outdoor Unit … page 487
  • 2.2 Field Wiring … page 497
  • 2.3 Indoor Unit … page 505
  • 2.4 BS Unit BSVQ36P/60PVJU … page 509
  • 3. List of Electrical and Functional
    Parts … page 510
  • 3.1 Outdoor Unit … page 510
  • 3.2 Indoor Side … page 514
  • 4. Option List … page 518
  • 4.1 Option List of Controllers … page 518
  • 4.2 Option Lists (Outdoor Unit) … page 519
  • 5. Piping Installation Point … page 520
  • 5.1 Piping between Outside Units … page 520
  • 6. Thermistor Resistance / Temperature
    Characteristics … page 523
  • 7. Pressure Sensor … page 525
  • 8. Method of Checking Inverter’s Power
    Transistors & Diode Modules … page 526
  • 9. Example of Connection … page 529
  • Precautions for New Refrigerant (R-410A) … page 535

  • 1. Precautions for New Refrigerant
    (R-410A) … page 536
  • 1.1 Service Tools … page 538
  • Index …i
  • Drawings & Flow Charts … iv