Daikin VRV III-S RXYMQ36 48PVJU Service Manual page 4

4. Troubleshooting (OP: Centralized Remote Controller) ...........................197
Table of Contents
3.11 "C9" Malfunction of Thermistor (R1T) for Suction Air ................................ 127
3.12 "CJ" Malfunction of Thermostat Sensor in Remote Controller................... 128
3.13 "E1" PCB Defect........................................................................................ 129
3.14 "E3" Actuation of High Pressure Switch .................................................... 130
3.15 "E4" Actuation of Low Pressure Sensor .................................................... 133
3.16 "E5" Inverter Compressor Motor Lock ....................................................... 135
3.17 "E7" Malfunction of Outdoor Unit Fan Motor ............................................. 138
3.18 "E9" Malfunction of Moving Part of
Electronic Expansion Valve (Y1E, Y3E)................................................... 141
3.19 "F3" Abnormal Discharge Pipe Temperature (R2T) .................................. 143
3.20 "F6" Refrigerant Overcharged ................................................................... 145
3.21 "H9" Malfunction of Thermistor (R1T) for Outdoor Air ............................... 146
3.22 "J3" Malfunction of Discharge Pipe Thermistor (R2T) .............................. 147
3.23 "J5" Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2.............. 148
3.24 "J6" Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger .................................................................. 149
3.25 "J7" Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe .......... 150
3.26 "J9" Malfunction of Subcooling Heat Exchanger Gas Pipe
Thermistor (R6T) ...................................................................................... 151
3.27 "JA" Malfunction of High Pressure Sensor ................................................ 152
3.28 "JC" Malfunction of Low Pressure Sensor................................................. 154
3.29 "L1" Malfunction of PCB............................................................................ 157
3.30 "L4" Malfunction of Inverter Radiation Fin Temperature Rise ................... 159
3.31 "L5" Inverter Compressor Abnormal ......................................................... 162
3.32 "L8" Inverter Current Abnormal ................................................................. 164
3.33 "L9" Inverter Compressor Start up Error ................................................... 166
3.34 "P1" High Voltage of Capacitor in Main Inverter Circuit............................. 169
3.35 "P4" Malfunction of Inverter Radiating Fin Temperature Rise Sensor....... 171
3.36 "U0" Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure.......................................................... 173
3.37 "U2" Power Supply Insufficient or Instantaneous Failure .......................... 175
3.38 "U3" Check Operation is not Executed ...................................................... 178
3.39 "U4" Malfunction of Transmission between
Indoor Units and Outdoor Units................................................................ 179
3.40 "U5" Malfunction of Transmission between
Remote Controller and Indoor Unit........................................................... 183
3.41 "U8" Malfunction of Transmission between
Main and Sub Remote Controllers ........................................................... 185
3.42 "U9" Malfunction of Transmission between
Indoor Units and Outdoor Units in the Same System............................... 186
3.43 "UA" Improper Combination of Indoor and Outdoor Units etc.................... 187
3.44 "UC" Address Duplication of Centralized Remote Controller ..................... 190
3.45 "UE" Malfunction of Transmission between
Centralized Remote Controller and Indoor Unit ....................................... 191
3.46 "UF" System is not Set yet......................................................................... 194
3.47 "UH" Malfunction of System, Refrigerant System Address Undefined....... 195
4.1 "M1" PCB Defect ....................................................................................... 197
SiUS34-907
iii