Daikin RXYQ5-48MAY1 Service Manual page 175

4. Troubleshooting (OP: Central Remote Controller) ..............................245
5. Troubleshooting (OP: Schedule Timer)...............................................251
164
3.28 "J8" Malfunction of Oil Equalizing Pipe Thermistor (R7T).....................214
3.29 "J9" Malfunction of Receiver Gas Pipe Thermistor (R5T).....................215
3.30 "JA" Outdoor Unit: Malfunction of Discharge
Pipe Pressure Sensor ..........................................................................216
3.31 "JC" Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor .........217
3.32 "L4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise.................................................................................218
3.33 "L5" Outdoor Unit: Inverter Compressor Abnormal ...............................219
3.34 "L8" Outdoor Unit: Inverter Current Abnormal.......................................220
3.35 "L9" Outdoor Unit: Inverter Start up Error..............................................221
3.36 "LC" Outdoor Unit: Malfunction of Transmission Between
Inverter and Control PC Board .............................................................222
3.37 "P1" Outdoor Unit: Inverter Over-Ripple Protection ...............................224
3.38 "P4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor ....................................................................225
3.39 "UO" Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure......................................................226
3.40 "U1" Reverse Phase, Open Phase.........................................................227
3.41 "U2" Power Supply Insufficient or Instantaneous Failure ......................228
3.42 "U3" Check Operation not executed ......................................................230
3.43 "U4" Malfunction of Transmission Between Indoor Units ......................231
3.44 "U5" Malfunction of Transmission Between Remote
Controller and Indoor Unit ....................................................................233
3.45 "U7" Malfunction of Transmission Between Outdoor Units....................234
3.46 "U8" Malfunction of Transmission Between Master and
Slave Remote Controllers ....................................................................236
3.47 "U9" Malfunction of Transmission Between Indoor and
Outdoor Units in the Same System ......................................................237
3.48 "UA" Excessive Number of Indoor Units ................................................239
3.49 "UC" Address Duplication of Central Remote Controller ........................240
3.50 "UE" Malfunction of Transmission Between Central
Remote Controller and Indoor Unit.......................................................241
3.51 "UF" Refrigerant System not Set, Incompatible Wiring/Piping ...............243
3.52 "UH" Malfunction of System, Refrigerant System Address Undefined...244
4.1 "UE" Malfunction of Transmission Between Central
Remote Controller and Indoor Unit.......................................................245
4.2 "M1" PC Board Defect ............................................................................246
4.3 "M8" Malfunction of Transmission Between Optional
Controllers for Centralized Control .......................................................247
4.4 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................248
4.5 "MC" Address Duplication, Improper Setting ..........................................250
5.1 "UE" Malfunction of Transmission Between Central
Remote Controller and Indoor Unit.......................................................251
5.2 "M1" PC Board Defect ............................................................................253
5.3 "M8" Malfunction of Transmission Between Optional
Controllers for Centralized Control .......................................................254
5.4 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................255
5.5 "MC" Address Duplication, Improper Setting ..........................................257
Si39-407
Troubleshooting