Daikin AC VRV-WII-SYSTEM Water Cooled Inverter Series — Heat Pump / Heat Recovery-60Hz – Service Manual

This Service Manual is for Water Cooled Inverter Series

 

Indoor Units:

Ceiling mounted cassette type (Multi flow): FXFQ12MVJU ; FXFQ18MVJU ; FXFQ24MVJU ; FXFQ30MVJU ; FXFQ36MVJU
Ceiling suspended type: FXHQ12MVJU ; FXHQ24MVJU ; FXHQ36MVJU
Slim ceiling mounted duct type: FXDQ07MVJU ; FXDQ09MVJU ; FXDQ12MVJU ; FXDQ18MVJU ; FXDQ24MVJU
Wall mounted type: FXAQ07MVJU ; FXAQ09MVJU ; FXAQ12MVJU ; FXAQ18MVJU ; FXAQ24MVJU
Ceiling mounted built-in type: FXSQ12MVJU ; FXSQ18MVJU ; FXSQ24MVJU ; FXSQ30MVJU ; FXSQ36MVJU ; FXSQ48MVJU
Floor standing type: FXLQ12MVJU ; FXLQ18MVJU ; FXLQ24MVJU
Ceiling mounted duct type: FXMQ30MVJU ; FXMQ36MVJU ; FXMQ48MVJU
Concealed floor standing type: FXNQ12MVJU ; FXNQ18MVJU ; FXNQ24MVJU
BS Units: BSVQ36MVJU ; BSVQ60MVJU

 

Outside Units:

RWEYQ60MTJU ; RWEYQ72MTJU ; RWEYQ84MTJU ; RWEYQ144MTJU ; RWEYQ168MTJU ; RWEYQ216MTJU ; RWEYQ252MTJU

 

CONTENTS:

  • 1. Introduction … vii
  • 1.1 Safety Cautions … vii
  • 1.2 PREFACE … xi
  • General Information … page 1

  • 1. Features … page 2
  • 1.1 Design flexibility … page 3
  • 1.2 Easy installation … page 5
  • 1.3 Energy saving … page 6
  • 1.4 Enhanced usability … page 7
  • 1.5 Outside unit lineup … page 8
  • 2. Model Names … page 9
  • 2.1 Water Cooled System … page 9
  • 3. External Appearance … page 10
  • 3.1 Indoor Units … page 10
  • 3.2 Outside Units … page 11
  • 4. Combination of Outside
    Units … page 12
  • 5. Capacity Range … page 13
  • Specifications … page 15

  • 1. Specifications … page 16
  • 1.1 Outside Units … page 16
  • 1.2 BS Units … page 23
  • 1.3 Indoor Units … page 24
  • Refrigerant Circuit … page 37

  • 1. Refrigerant Circuit … page 38
  • 1.1 RWEYQ60MTJU / RWEYQ72MTJU /
    RWEYQ84MTJU … page 38
  • 1.2 BSVQ36, 60M … page 40
  • 2. Functional Parts Layout … page 41
  • 2.1 RWEYQ60MTJU / RWEYQ72MTJU /
    RWEYQ84MTJU … page 41
  • 3. Refrigerant Flow for Each
    Operation Mode … page 43
  • 3.1 In Case of Heat Pump
    Connection … page 43
  • 3.2 In Case of Heat Recovery Connection
    (One Outside Unit Installation) … page 45
  • 3.3 In Case of Heat Recovery Connection
    (3 Outside units Connection.) … page 49
  • Function … page 53

  • 1. Function General … page 55
  • 1.1 Symbol … page 55[/list_item
  • 1.2 Operation Mode … page 56
  • 1.3 Normal Operation … page 57
  • 1.4 BS unit & Indoor unit
    operation mode detail … page 58
  • 2. Stop … page 59
  • 2.1 Stopping Operation … page 59
  • 3. Standby … page 61
  • 3.1 Restart Standby … page 61
  • 3.2 Crankcase Heater Control … page 61
  • 4. Startup Control … page 62
  • 4.1 Cooling Start-up Control … page 62
  • 4.2 Heating Start-up Control … page 63
  • 4.3 Pressure Equalizing Control … page 64
  • 5. Normal Control … page 65
  • 5.1 Compressor Control … page 65
  • 5.2 Electronic Expansion Valve
    Control … page 67
  • 5.3 Heat Exchange Mode in Heating
    Operation or Simultaneous Cooling / Heating
    Operation … page 68
  • 6. Protection Control … page 70
  • 6.1 High Pressure Protection Control … page 70
  • 6.2 Low Pressure Protection Control … page 71
  • 6.3 Discharge Pipe Protection Control … page 73
  • 6.4 Inverter Protection Control … page 74
  • 6.5 Cooling Fan Control … page 75
  • 7. Special Operation … page 76
  • 7.1 Oil Return Operation … page 76
  • 7.2 Oil Return Operation of Water Heat
    Exchanger … page 78
  • 7.3 Pump-down Residual Operation
    Control … page 79
  • 7.4 Refrigerant Drift Prevention … page 81
  • 8. Other Control … page 82
  • 8.1 Outside Unit Rotation … page 82
  • 9. Outline of Control (Indoor Unit) … page 83
  • 9.1 Drain Pump Control … page 83
  • 9.2 Louver Control for Preventing
    Ceiling Dirt … page 85
  • 9.3 Thermostat Sensor in Remote
    Controller … page 86
  • 9.4 Thermostat Control While in
    Normal Operation … page 88
  • 9.5 Thermostat Control in Dry
    Operation … page 88
  • 9.6 Electronic expansion Valve
    Control … page 89
  • 9.7 Hot Start Control (In Heating
    Operation Only) … page 89
  • 9.8 Heater Control … page 90
  • 9.9 List of Swing Flap Operations … page 91
  • 9.10 Freeze Prevention … page 92
  • Test Operation … page 93

  • 1. Test Operation … page 94
  • 1.1 Procedure and Outline … page 94
  • 2. Outside Unit PC Board Layout … page 98
  • 3. Field Setting … page 99
  • 3.1 Field Setting from Remote
    Controller … page 99
  • 3.2 Field Setting from Outside
  • Unit … page 110

    Troubleshootinga da popitam … page 137

  • 1. Troubleshooting by Remote
    Controller … page 140
  • 1.1 The INSPECTION / TEST Button … page 140
  • 1.2 Self-diagnosis by Wired Remote
    Controller … page 141
  • 1.3 Self-diagnosis by Wireless Remote
    Controller … page 142
  • 1.4 Operation of the Remote Controller’s
    Inspection / Test Operation Button … page 144
  • 1.5 Remote Controller Service Mode … page 145
  • 1.6 Remote Controller Self-Diagnosis
    Function … page 147
  • 2. Troubleshooting by Indication on the
    Remote Controller … page 154
  • 2.1 “A0” Indoor Unit: Error of External
    Protection Device … page 154
  • 2.2 “A1” Indoor Unit: PC Board Defect … page 155
  • 2.3 “A3” Indoor Unit: Malfunction of
    Drain Level Control System (S1L) … page 156
  • 2.4 “A6” Indoor Unit: Fan Motor (M1F)
    Lock, Overload … page 158
  • 2.5 “A7” Indoor Unit: Malfunction of
    Swing Flap Motor (MA) … page 162
  • 2.6 “A9” Indoor Unit: Malfunction of
    Moving Part of
    Electronic Expansion Valve (Y1E) … page 164
  • 2.7 “AF” Indoor Unit: Drain Level
    above Limit … page 166
  • 2.8 “AJ” Indoor Unit: Malfunction of
    Capacity Determination Device … page 167
  • 2.9 “C4” Indoor Unit: Malfunction of
    Thermistor (R2T) for Heat Exchanger … page 168
  • 2.10 “C5” Indoor Unit: Malfunction of
    Thermistor (R3T) for Gas Pipes … page 169
  • 2.11 “C9” Indoor Unit: Malfunction of
    Thermistor (R1T) for Suction Air … page 170[/list_item]

  • 2.12 “CJ” Indoor Unit: Malfunction of
    Thermostat Sensor in Remote Controller … page 171
  • 2.13 “E1” Outside Unit: PC
    Board Defect … page 172
  • 2.14 “E3” Outside Unit: Actuation of High
    Pressure Switch … page 173
  • 2.15 “E4” Outside Unit: Actuation of Low
    Pressure Sensor … page 175
  • 2.16 “E5” Compressor Motor Lock … page 177
  • 2.17 “E9” Outside Unit: Malfunction
    of Moving Part of Electronic
    Expansion Valve (Y1E,Y3E) … page 179
  • 2.18 “F3” Outside Unit: Abnormal Discharge
    Pipe Temperature … page 181
  • 2.19 “F6” Refrigerant Overcharged … page 182
  • 2.20 “HJ” Malfunction of Water system … page 184
  • 2.21 “J3” Outside Unit: Malfunction of
    Discharge Pipe Thermistor (R3T) … page 186
  • 2.22 “J4” Malfunction of Heat Exchanger
    Gas Pipe Thermistor (R4T) … page 187
  • 2.23 “J5” Outside Unit: Malfunction of
    Thermistor (R2T) for Suction Pipe … page 188
  • 2.24 “J7” Malfunction of Liquid Pipe
    Thermistor (R6T) … page 189
  • 2.25 “J9” Malfunction of Sub Cooling Heat
    Exchanger Outlet Thermistor (R5T) … page 190
  • 2.26 “JA” Outside Unit: Malfunction of
    Discharge Pipe Pressure Sensor … page 191
  • 2.27 “JC” Outside Unit: Malfunction of
    Suction Pipe Pressure Sensor … page 193
  • 2.28 “L1” Outdoor Unit: Malfunction of
    PC Board … page 195
  • 2.29 “L4” Outside Unit: Malfunction of
    Inverter Radiating Fin
    Temperature Rise (R1T) … page 196
  • 2.30 “L5” Outside Unit: Inverter Compressor
    Abnormal … page 197
  • 2.31 “L8” Outside Unit: Inverter Current
    Abnormal … page 198
  • 2.32 “L9” Outside Unit: Inverter Start
    up Error … page 200
  • 2.33 “LC” Outside Unit: Malfunction of
    Transmission between Inverter and
    Control PC Board … page 201
  • 2.34 “P1” Outside Unit: Inverter Over-
    Ripple Protection … page 203
  • 2.35 “P4” Outside Unit: Malfunction of
    Inverter Radiating Fin
    Temperature Sensor … page 205
  • 2.36 “PJ” Outdoor Unit: Faulty Field
    Setting after Replacing Main PC Board or
    Faulty Combination of PC Board … page 206
  • 2.37 “UO” Low Pressure Drop Due to
    Refrigerant Shortage or
    Electronic Expansion Valve Failure … page 207
  • 2.38 “U1” Reverse Phase, Open Phase … page 209
  • 2.39 “U2” Power Supply Insufficient or
    Instantaneous Failure … page 210
  • 2.40 “U3” Check Operation not Executed … page 212
  • 2.41 “U4” Malfunction of Transmission
    between Indoor Units … page 213
  • 2.42 “U5” Malfunction of Transmission
    between Remote Controller and
    Indoor Unit … page 215
  • 2.43 “U7” Malfunction of Transmission
    between Outside Units … page 216
  • 2.44 “U8” Malfunction of Transmission
    between Master and
    Slave Remote Controllers … page 218
  • 2.45 “U9” Malfunction of Transmission
    between Indoor and
    Outside Units in the Same System … page 219
  • 2.46 “UA” Indoor & Outside Units
    and Remote Controller
    Combination Failure … page 221
  • 2.47 “UC” Address Duplication of Centralized
    Controller … page 223
  • 2.48 “UE” Malfunction of Transmission
    between Centralized Controller and
    Indoor Unit … page 224
  • 2.49 “UF” Refrigerant System not Set,
    Incompatible Wiring/Piping … page 226
  • 2.50 “UH” Malfunction of System, Refrigerant
    System Address Undefined … page 227
  • 3. Troubleshooting (OP: Central Remote
    Controller) … page 229
  • 3.1 “M1” PC Board Defect … page 229
  • 3.2 “M8” Malfunction of Transmission between
    Optional Controllers for
    Centralized Control … page 230
  • 3.3 “MA” Improper Combination of Optional
    Controllers for
    Centralized Control … page 232
  • 3.4 “MC” Address Duplication, Improper
    Setting … page 234
  • 4. Troubleshooting (OP: Schedule Timer) … page 235
  • 4.1 “UE” Malfunction of Transmission between
    Centralized Controller and
    Indoor Unit … page 235
  • 4.2 “M1” PC Board Defect … page 237
  • 4.3 “M8” Malfunction of Transmission
    between Optional Controllers for
    Centralized Control … page 238
  • 4.4 “MA” Improper Combination of
    Optional Controllers for
    Centralized Control … page 240
  • 4.5 “MC” Address Duplication,
    Improper Setting … page 242
  • 5. Troubleshooting (OP: Unified
    ON/OFF Controller) … page 243
  • 5.1 Operation Lamp Blinks … page 243
  • 5.2 Display “Under Host Computer
    Integrate Control” Blinks
    (Repeats Single Blink) … page 245
  • 5.3 Display “Under Host Computer
    Integrate Control” Blinks
    (Repeats Double Blink) … page 248
  • Procedure for Mounting /
    Dismounting of Switch Box … page 255

  • 1. Procedure for Mounting /
    Dismounting of Switch Box … page 256
  • 1.1 Procedure for Dismounting … page 256
  • 1.2 Procedure for Mounting … page 256
  • Appendix … page 259

  • 1. Piping Diagrams … page 260
  • 1.1 Outside Units … page 260
  • 1.2 Indoor Unit … page 261
  • 1.3 BS Unit … page 263
  • 2. Wiring Diagrams … page 264
  • 2.1 Outside Unit … page 264
  • 2.2 Outside Unit Field Wiring … page 265
  • 2.3 Indoor Unit … page 267
  • 2.4 BS Unit … page 271
  • 3. List of Electrical and
    Functional Parts … page 272
  • 3.1 Outside Unit … page 272
  • 3.2 Indoor Side … page 273
  • 4. Option List … page 276
  • 4.1 Optional Accessories … page 276
  • 5. Thermistor Resistance / Temperature
    Characteristics … page 278
  • 6. Pressure Sensor … page 280
  • 7. Method of Replacing the Inverter’s Power
    Transistors and
    Diode Modules … page 281
  • 7.1 Method of Replacing the Inverter’s Power
    Transistors and
    Diode Modules … page 281
  • Precautions for New Refrigerant (R-410A) … page 283

  • 1. Precautions for New Refrigerant (R-410A) … page 284
  • 1.1 Outline … page 284
  • 1.2 Service Tools … page 286
  • Index … i
  • Drawings & Flow Charts … v