VRV R-410A Heat Pump 60Hz: RXYQ72MTJU ; RXYQ96MTJU ; RXYQ144MTJU ; RXYQ168MTJU ; RXYQ192MTJU

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

 

Indoor Units

Ceiling mounted cassette type (Multi flow)
FXFQ12MVJU ; FXFQ18MVJU ; FXFQ24MVJU ; FXFQ30MVJU ; FXFQ36MVJU
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
BSVQ36MVJU ; BSVQ60MVJU

 

Outdoor Units

RXYQ72MTJU ; RXYQ96MTJU ; RXYQ144MTJU ; RXYQ168MTJU ; RXYQ192MTJU

 

CONTENTS:

  • 1. Introduction … vi
  • 1.1 Safety Cautions … vi
  • 1.2 PREFACE … x
  • 1. Model Names of Indoor/Outdoor Units … page 2
  • 2. External Appearance … page 3
  • 2.1 Indoor Units … page 3
  • 2.2 Outdoor Units … page 3
  • 3. Model Selection … page 4
  • Specifications … page 5

  • 1. Specifications … page 6
  • 1.1 Outdoor Units … page 6
  • 1.2 Indoor Units … page 11
  • Refrigerant Circuit … page 23

  • 1. Refrigerant Circuit … page 24
  • 1.1 RXYQ72M, 96M … page 24
  • 2. Functional Parts Layout … page 26
  • 2.1 RXYQ72M, 96M … page 26
  • 3. Refrigerant Flow for Each
    Operation Mode … page 27
  • Function … page 31

  • 1. Operation Mode … page 32
  • 2. Basic Control … page 33
  • 2.1 Normal Operation … page 33
  • 2.2 Compressor PI Control … page 34
  • 2.3 Electronic Expansion Valve
    PI Control … page 38
  • 2.4 Cooling Operation Fan Control … page 39
  • 3. Special Control … page 40
  • 3.1 Startup Contro … page 40
  • 3.2 Oil Return Operatio … page 41
  • 3.3 Defrosting Operation … page 43
  • 3.4 Pump-down Residual Operation … page 44
  • 3.5 Restart Standby … page 45
  • 3.6 Stopping Operation … page 46
  • 3.7 Pressure Equalization prior to
    Startup … page 48
  • 4. Protection Control … page 49
  • 4.1 High Pressure Protection Control … page 49
  • 4.2 Low Pressure Protection Control … page 50
  • 4.3 Discharge Pipe Protection Control … page 51
  • 4.4 Inverter Protection Control … page 52
  • 4.5 STD Compressor Overload
    Protection … page 53
  • 5. Other Control … page 54
  • 5.1 Outdoor Unit Rotation … page 54
  • 5.2 Emergency Operation … page 55
  • 5.3 Demand Operation … page 57
  • 5.4 Heating Operation Prohibition … page 57
  • 6. Outline of Control (Indoor Unit) … page 58
  • 6.1 Drain Pump Control … page 58
  • 6.2 Thermostat Sensor in Remote
    Controller … page 60
  • 6.3 Freeze Prevention … page 62
  • Test Operation … page 63

  • 1. Test Operation … page 64
  • 1.1 Procedure and Outline … page 64
  • 1.2 Operation When Power is Turned On … page 67
  • 2. Outdoor Unit PC Board Layout … page 68
  • 3. Field Setting … page 69
  • 3.1 Field Setting from Remote
    Controller … page 69
  • 3.2 Field Setting from Outdoor
    Unit … page 81
  • Troubleshooting … page 105

  • 1. Troubleshooting by Remote
    Controller … page 108
  • 1.1 The INSPECTION / TEST Button … page 108
  • 1.2 Self-diagnosis by Wired Remote
    Controller … page 109
  • 1.3 Self-diagnosis by Wireless Remote
    Controller … page 110
  • 1.4 Operation of The Remote Controller’
    s Inspection / Test Operation Button … page 112
  • 5 Remote Controller Service Mode … page 113
  • 6 Remote Controller Self-Diagnosis
    Function … page 115
  • 2. Troubleshooting by Indication on
    the Remote Controller … page 120
  • 2.1 “A0” Indoor Unit: Error of External
    Protection Device … page 120
  • 2.2 “A1” Indoor Unit: PC Board Defect … page 121
  • 2.3 “A3” Indoor Unit: Malfunction of
    Drain Level Control System (S1L) … page 122
  • 2.4 “A6” Indoor Unit: Fan Motor (M1F)
    Lock, Overload … page 124
  • 2.5 “A7” Indoor Unit: Malfunction
    of Swing Flap Motor (MA) … page 125
  • 2.6 “A9” Indoor Unit: Malfunction of Moving
    Part of Electronic Expansion Valve (20E) … page 127
  • 2.7 “AF” Indoor Unit: Drain Level
    above Limit … page 129
  • 8 “AJ” Indoor Unit: Malfunction
    of Capacity Determination Device … page 130
  • 2.9 “C4” Indoor Unit: Malfunction of
    Thermistor (R2T) for Heat Exchanger …. 131
  • 2.10 “C5” Indoor Unit: Malfunction
    of Thermistor (R3T) for Gas Pipes … page 132
  • 2.11 “C9” Indoor Unit: Malfunction of
    Thermistor (R1T) for Suction Air … page 133
  • 2.12 “CJ” Indoor Unit: Malfunction of
    Thermostat Sensor in Remote Controller … page 134
  • 2.13 “E1” Outdoor Unit: PC Board Defect … page 135
  • 2.14 “E3” Outdoor Unit: Actuation of
    High Pressure Switch … page 136
  • 2.15 “E4” Outdoor Unit: Actuation of
    Low Pressure Sensor … page 137
  • 2.16 “E5” Compressor Motor Lock … page 139
  • 2.17 “E6” Compressor Motor Overcurrent/
    Lock … page 141
  • 2.18 “E7” Malfunction of Outdoor Unit
    Fan Motor … page 142
  • 2.19 “E9” Outdoor Unit: Malfunction of Moving Part
    of Electronic Expansion Valve (Y1E, Y2E) … page 144
  • 2.20 “F3” Outdoor Unit: Abnormal Discharge
    Pipe Temperature … page 146
  • 2.21 “F6” Refrigerant Overcharged … page 147
  • 2.22 “H7” Abnormal Outdoor
    Fan Motor Signal … page 148
  • 2.23 “H9” Outdoor Unit: Malfunction of
    Thermistor (R1T) for Outdoor Air … page 150
  • 2.24 “J2” Current Sensor Malfunction … page 151
  • 2.25 “J3” Outdoor Unit: Malfunction
    of Discharge Pipe Thermistor (R31~33T) … page 152
  • 2.26 “J5” Outdoor Unit: Malfunction of
    Thermistor (R2T) for Suction Pipe … page 153
  • 2.27 “J6” Outdoor Unit: Malfunction
    of Thermistor (R4T) for Outdoor Unit Heat
    Exchanger Deicer … page 154
  • 2.28 “J7” Malfunction of Receiver Outlet
    Liquid Pipe Thermistor (R6T) … page 155
  • 2.29 “J8”Malfunction of Oil Equalizing
    Pipe Thermistor (R7T) … page 156
  • 2.30 “J9” Malfunction of Sub-Cooling Gas
    Pipe Thermistor (R5T) … page 157
  • 2.31 “JA” Outdoor Unit: Malfunction of
    Discharge Pipe Pressure Sensor … page 158
  • 2.32 “JC” Outdoor Unit: Malfunction of
    Suction Pipe Pressure Sensor … page 160
  • 2.33 “L4” Outdoor Unit: Malfunction of
    Inverter Radiating Fin Temperature Rise … page 161
  • 2.34 “L5” Outdoor Unit: Inverter Compressor
    Abnormal … page 162
  • 2.35 “L8” Outdoor Unit: Inverter Current
    Abnormal … page 163
  • 2.36 “L9” Outdoor Unit: Inverter Start
    up Error … page 165
  • 2.37 “LC” Outdoor Unit: Malfunction
    of Transmission Between Inverter
    and Control PC Board … page 166
  • 2.38 “P1” Outdoor Unit: Inverter
    Over-Ripple Protection … page 168
  • 2.39 “P4” Outdoor Unit: Malfunction
    of Inverter Radiating Fin Temperature
    Rise Sensor … page 170
  • 2.40 “PJ” Outdoor Unit: Faulty Field
    Setting after Replacing Main PC Board or Faulty
    Combination of PC Board … page 171
  • 2.41 “UO” Outdoor Unit: Low Pressure
    Drop Due to Refrigerant Shortage
    or Electronic Expansion Valve Failure … page 172
  • 2.42 “U1” Outdoor Unit: Reverse Phase,
    Open Phase … page 174
  • 2.43 “U2” Outdoor Unit: Power Supply
    Insufficientor Instantaneous Failure … page 175
  • 2.44 “U3” Outdoor Unit: Check Operation
    not executed … page 177
  • 2.45 “U4” Malfunction of Transmission
    Between Indoor Units and Outdoor Units … page 178
  • 2.46 “U5” Indoor Unit: Malfunction of
    Transmission Between Remote Controller
    and Indoor Unit … page 180
  • 2.47 “U7” Indoor Unit: Malfunction of
    Transmission Between Outdoor Units … page 181
  • 2.48 “U8” Indoor Unit: Malfunction of
    Transmission Between Main
    and Sub Remote Controllers … page 183
  • 2.49 “U9” Indoor Unit: Malfunction of
    Transmission Between Indoor Units
    and Outdoor Units in the Same System … page 184
  • 2.50 “UA” Improper Combination of
    Indoor Units and Outdoor Units/Indoor Units
    and Remote Controller … page 186
  • 2.51 “UC” Address Duplication of
    Central Remote Controller … page 188
  • 2.52 “UE” Malfunction of Transmission
    Between Centralized Controller
    and Indoor Unit … page 189
  • 2.53 “UF” System is not Set yet … page 191
  • 2.54 “UH” Malfunction of System,
    Refrigerant System Address Undefined … page 192
  • 3. Troubleshooting (OP: Central
    Remote Controller) … page 194
  • 3.1 “M1” PC Board Defect … page 194
  • 3.2 “M8” Malfunction of Transmission
    Between Optional Controllers
    for Centralized Control … page 195
  • 3.3 “MA” Improper Combination
    of Optional Controllers for Centralized
    Control … page 197
  • 3.4 “MC” Address Duplication,
    Improper Setting … page 199
  • 4. Troubleshooting (OP:
    Schedule Timer) … page 200
  • 4.1 “UE” Malfunction of Transmission
    Between Central Remote Controller
    and Indoor Unit … page 200
  • 4.2 “M1” PC Board Defect … page 202
  • 4.3 “M8” Malfunction of Transmission
    Between Optional Controllers for Centralized
    Control … page 203
  • 4.4 “MA” Improper Combination of
    Optional Controllers for Centralized
    Control … page 205
  • 4.5 “MC” Address Duplication,
    Improper Setting … page 207
  • 5. Troubleshooting (OP:
    Unified ON/OFF Controller) … page 208
  • 5.1 Operation Lamp Blinks … page 208
  • 5.2 Display “Under Centralized
    Control” Blinks (Repeats Single Blink) … page 210
  • 5.3 Display “Under Centralized Control” Blinks
    (Repeats Double Blink) … page 213
  • Replacement Procedure for INV Co
    mpressor, VRV … page 217

  • 1. Replacement Procedure for INV
    Compressor, VRV (RXYQ72M, 96M) … page 218
  • 1.1 Replacement Procedure … page 218
  • Appendix … page 219

  • 1. Piping Diagrams … page 220
  • 1.1 Outdoor Unit … page 220
  • 1.2 Indoor Unit … page 221
  • 2. Wiring Diagrams for
    Reference … page 223
  • 2.1 Outdoor Unit … page 223
  • 2.2 Field Wiring … page 224
  • 2.3 Indoor Unit … page 226
  • 3. List of Electrical and
    Functional Parts … page 230
  • 3.1 Outdoor Unit … page 230
  • 3.2 Indoor Side … page 231
  • 4. Option List … page 235
  • 4.1 Option List of Controllers … page 235
  • 4.2 Option Lists (Outdoor Unit) … page 236
  • 5. Example of Connection … page 237
  • 6. Thermistor Resistance /
    Temperature Characteristics … page 239
  • 7. Pressure Sensor … page 241
  • 8. Method of Replacing The Inverter’s
    Power Transistors and Diode Modules … page 242
  • 8.1 Method of Replacing The Inverter’s
    Power Transistors and Diode Modules … page 242
  • Precautions for New Refrigerant
    (R-410A) … page 245

  • 1. Precautions for New Refrigerant
    (R-410A) … page 246
  • 1.1 Outline … page 246
  • 1.2 Service Tools … page 248
  • Index …i
  • Drawings & Flow Charts …v