VRV R-410A Heat Recovery 60Hz: REYQ72MTJU ; REYQ96MTJU ; REYQ144MTJU ; REYQ168MTJU ; REYQ192MTJU

This Service Manual is for R-410A Heat Recovery 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

REYQ72MTJU ; REYQ96MTJU ; REYQ144MTJU ; REYQ168MTJU ; REYQ192MTJU

 

CONTENTS:

  • 1. Introduction … vi
  • 1.1 Safety Cautions … vi
  • 1.2 PREFACE … x
  • General Information … page 1

  • 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
  • 1.3 BS Units … page 23
  • Refrigerant Circuit … page 25

  • 1. Refrigerant Circuit … page 26
  • 1.1 REYQ72M, 96M … page 26
  • 1.2 BSVQ36, 60M … page 28
  • 2. Functional Parts Layout … page 29
  • 2.1 REYQ72M, 96M … page 29
  • 3. Refrigerant Flow for E
    ach Operation Mode … page 31
  • Function … page 37

  • 1. Function General … page 38
  • 1.1 Symbol … page 38
  • 1.2 Operation Mode … page 39
  • 2. Basic Control … page 40
  • 2.1 Normal Operation … page 40
  • 2.2 Compressor PI Control … page 41
  • 2.3 Electronic Expansion
    Valve PI Control … page 45
  • 2.4 Cooling Operation
    Fan Control … page 46
  • 2.5 Heat Exchange Mode in Heating
    Operation or Simultaneous Cooling / Heating
    Operation … page 47
  • 3. Special Control … page 48
  • 3.1 Startup Control … page 48
  • 3.2 Oil Return Operation … page 50
  • 3.3 Defrosting Operation … page 52
  • 3.4 Pressure Equalizing
    Control … page 53
  • 3.5 Pump-down Residual
    Operation … page 54
  • 3.6 Restart Standby … page 56
  • 3.7 Stopping Operation … page 57
  • 4. Protection Control … page 59
  • 4.1 High Pressure Protection
    Control … page 59
  • 4.2 Low Pressure Protection
    Control … page 60
  • 4.3 Discharge Pipe Protection
    Control … page 61
  • 4.4 Inverter Protection Control … page 62
  • 4.5 STD Compressor Overload
    Protection … page 63
  • 5. Other Control … page 64
  • 5.1 Outdoor Unit Rotation … page 64
  • 5.2 Emergency Operation … page 65
  • 5.3 Demand Operation … page 67
  • 5.4 Heating Operation
    Prohibition … page 67
  • 6. Outline of Control (
    Indoor Unit) … page 68
  • 6.1 Drain Pump Control … page 68
  • 6.2 Thermostat Sensor
    in Remote Controller … page 70
  • 6.3 Freeze Prevention … page 72
  • Test Operation … page 73

  • 1. Test Operation … page 74
  • 1.1 Procedure and Outline … page 74
  • 1.2 Operation When Power is
    Turned On … page 77
  • 2. Outdoor Unit PC Board Layout … page 78
  • 3. Field Setting … page 79
  • 3.1 Field Setting from Remote
    Controller … page 79
  • 3.2 Field Setting from
    Outdoor Unit … page 91
  • Troubleshooting … page 111

  • 1. Troubleshooting by Remote
    Controller … page 114
  • 1.1 The INSPECTION / TEST Button … page 114
  • 1.2 Self-diagnosis by Wired
    Remote Controller … page 115
  • 1.3 Self-diagnosis by Wireless
    Remote Controller … page 116
  • 1.4 Operation of the Remote
    Controller’s Inspection / Test Operation
    Button … page 119
  • 1.5 Remote Controller Service
    Mode … page 120
  • 1.6 Remote Controller Self-Diagnosis
    Function … page 122
  • 2. Troubleshooting by Indication
    on the Remote Controller … page 127
  • 2.1 “A0” Indoor Unit: Error of
    External Protection Device … page 127
  • 2.2 “A1” Indoor Unit: PC Board
    Defect … page 128
  • 2.3 “A3” Indoor Unit: Malfunction
    of Drain Level Control System (S1L) … page 129
  • 2.4 “A6” Indoor Unit: Fan Motor
    (M1F) Lock, Overload … page 131
  • 2.5 “A7” Indoor Unit: Malfunction
    of Swing Flap Motor (MA) … page 132
  • 2.6 “A9” Indoor Unit: Malfunction
    of Moving Part of Electronic Expansion
    Valve (20E) … page 134
  • 2.7 “AF” Indoor Unit: Drain Level
    above Limit … page 136
  • 2.8 “AJ” Indoor Unit: Malfunction
    of Capacity Determination Device … page 137
  • 2.9 “C4” Indoor Unit: Malfunction
    of Thermistor (R2T)
    for Heat Exchanger … page 138
  • 2.10 “C5” Indoor Unit: Malfunction
    of Thermistor (R31T, R32T)
    for Gas Pipes … page 139
  • 2.11 “C9” Indoor Unit: Malfunction
    of Thermistor (R1T) for Suction Air … page 140
  • 2.12 “CJ” Indoor Unit: Malfunction
    of Thermostat Sensor in Remote
    Controller … page 141
  • 2.13 “E1” Outdoor Unit: PC Board
    Defect … page 142
  • 2.14 “E3” Outdoor Unit: Actuation
    of High Pressure Switch … page 143
  • 2.15 “E4” Outdoor Unit: Actuation
    of Low Pressure Sensor … page 144
  • 2.16 “E5” Compressor Motor Lock
    (INV Compressor) … page 145
  • 2.17 “E6” Compressor Motor Overcurrent/
    Lock (STD Compressor) … page 146
  • 2.18 “E7” Malfunction of Outdoor
    Unit Fan Motor … page 147
  • 2.19 “E9” Outdoor Unit: Malfunction
    of Moving Part of Electronic Expansion Valve
    (Y1E, Y2E, Y3E) … page 149
  • 2.20 “F3” Outdoor Unit: Abnormal
    Discharge Pipe Temperature … page 151
  • 2.21 “F6” Refrigerant Overcharged … page 152
  • 2.22 “H7” Abnormal Outdoor Fan
    Motor Signal … page 153
  • 2.23 “H9” Outdoor Unit: Malfunction of
    Thermistor for Outdoor Air (R1T) … page 154
  • 2.24 “J2” Current Sensor Malfunction … page 155
  • 2.25 “J3” Outdoor Unit: Malfunction of
    Discharge Pipe Thermistor (R31~32T) … page 156
  • 2.26 “J4” Malfunction of Heat Exchanger
    Gas Pipe Thermistor (R81, 82T) …page 157
  • 2.27 “J5” Outdoor Unit: Malfunction of
    Thermistor (R2T) for Suction Pipe … page 158
  • 2.28 “J6” Outdoor Unit: Malfunction of
    Thermistor (R4T) for Outdoor Unit Heat Exchanger … page 159
  • 2.29 “J7” Malfunction of Receiver Outlet
    Liquid Pipe Thermistor (R6T) … page 160
  • 2.30 “J8” Malfunction of Oil Equalizing
    Pipe Thermistor (R7T) … page 161
  • 2.31 “J9” Malfunction of Sub-cooling
    Heat Exchanger Gas Pipe Thermistor (R5T) … page 162
  • 2.32 “JA” Outdoor Unit: Malfunction of
    Discharge Pipe Pressure Sensor … page 163
  • 2.33 “JC” Outdoor Unit: Malfunction of
    Suction Pipe Pressure Sensor … page 164
  • 2.34 “L4” Outdoor Unit: Malfunction of
    Inverter Radiating Fin Temperature
    Rise … page 165
  • 2.35 “L5” Outdoor Unit: Inverter
    Compressor Abnormal … page 166
  • 2.36 “L8” Outdoor Unit: Inverter Current
    Abnormal … page 167
  • 2.37 “L9” Outdoor Unit: Inverter Start
    up Error … page 168
  • 2.38 “LC” Outdoor Unit: Malfunction of
    Transmission between Inverter and Control PC Board … page 169
  • 2.39 “P1” Outdoor Unit: Inverter Over-
    Ripple Protection … page 171
  • 2.40 “P4” Outdoor Unit: Malfunction of
    Inverter Radiating Fin Temperature Rise Sensor … page 172
  • 2.41 “PJ” Outdoor Unit: Faulty Field
    Setting after Replacing Main PC Board or
    Faulty Combination of PC Board … page 173
  • 2.42 “UO” Outdoor Unit: Low Pressure
    Drop due to Refrigerant Shortage or Electronic
    Expansion Valve Failure … page 174
  • 2.43 “U1” Outdoor Unit: Reverse Phase,
    Open Phase … page 175
  • 2.44 “U2” Outdoor Unit: Power Supply
    Insufficient or Instantaneous Failure … page 176
  • 2.45 “U3” Outdoor Unit: Check
    Operation not Executed … page 178
  • 2.46 “U4” Malfunction of Transmission
    between Indoor Units … page 179
  • 2.47 “U5” Indoor Unit: Malfunction of
    Transmission between Remote Controller and
    Indoor Unit … page 181
  • 2.48 “U7” Indoor Unit: Malfunction of
    Transmission between Outdoor Units …page 182
  • 2.49 “U8” Indoor Unit: Malfunction
    of Transmission between MAIN and SUB Remote
    Controllers … page 184
  • 2.50 “U9” Indoor Units: Malfunction of
    Transmission between Indoor Units and Outdoor Units
    in the Same System … page 185
  • 2.51 “UA” Improper Combination of
    Indoor Units and Outdoor Units/Indoor Units
    and Remote Controller … page 187
  • 2.52 “UC” Address Duplication of Centralized
    Remote Controller … page 188
  • 2.53 “UE” Malfunction of Transmission
    between Centralized Controller and Indoor Unit … page 189
  • 2.54 “UF” System is not Set yet … page 191
  • 2.55 “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 196
  • 3.4 “MC” Address Duplication, Improper
    Setting … page 198
  • 4. Troubleshooting (OP: Schedule Timer) … page 199
  • 4.1 “UE” Malfunction of Transmission
    Between Centralized Controller and Indoor Unit … page 199
  • 4.2 “M1” PC Board Defect … page 201
  • 4.3 “M8” Malfunction of Transmission
    Between Optional Controllers for Centralized Control … page 202
  • 4.4 “MA” Improper Combination of Optional
    Controllers for Centralized Control … page 203
  • 4.5 “MC” Address Duplication, Improper
    Setting … page 205
  • 5. Troubleshooting (OP: Unified ON/OFF
    Controller) … page 206
  • 5.1 Operation Lamp Blinks …page 206
  • 5.2 Display “Under Centralized Control”
    Blinks (Repeats Single Blink) … page 208
  • 5.3 Display “Under Centralized Control”
    Blinks (Repeats Double Blink) … page 211
  • Replacement Procedure for INV Compressor,
    VRV (REYQ72M, 96M) … page 215

  • 1. Replacement Procedure for INV
    Compressor,VRV (REYQ72M, 96M) … page 216
  • 1.1 Replacement Procedure … page 216
  • Appendix … page 217

  • 1. Piping Diagrams … page 218
  • 1.1 Outdoor Unit … page 218
  • 1.2 Indoor Unit … page 219
  • 1.3 BS Unit … page 221
  • 2. Wiring Diagrams for Reference … page 222
  • 2.1 Outdoor Unit … page 222
  • 2.2 Field Wiring … page 223
  • 2.4 BS Unit … page 229
  • 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 234
  • 4.1 Option List of Controllers … page 234
  • 4.2 Option Lists (Outdoor Unit) … page 235
  • 5. Example of Connection (R-410A Type) … page 236
  • 5.1 Heat Recovery System … page 236
  • 5.2 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
  • 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