Daikin RXYQ72 Serivce Manual page 117

3. Troubleshooting (OP: Central Remote Controller) ..................................194
106
2.28 "J7" Malfunction of Receiver Outlet Liquid Pipe
Thermistor (R6T) ...................................................................................... 155
2.29 "J8"Malfunction of Oil Equalizing Pipe Thermistor (R7T).......................... 156
2.30 "J9" Malfunction of Sub-Cooling Gas Pipe Thermistor (R5T) ................... 157
2.31 "JA" Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor......... 158
2.32 "JC" Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor ............. 160
2.33 "L4" Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise............................................................................... 161
2.34 "L5" Outdoor Unit: Inverter Compressor Abnormal ................................... 162
2.35 "L8" Outdoor Unit: Inverter Current Abnormal........................................... 163
2.36 "L9" Outdoor Unit: Inverter Start up Error.................................................. 165
2.37 "LC" Outdoor Unit: Malfunction of Transmission Between Inverter
and Control PC Board .............................................................................. 166
2.38 "P1" Outdoor Unit: Inverter Over-Ripple Protection ................................... 168
2.39 "P4" Outdoor Unit: Malfunction of Inverter Radiating
Fin Temperature Rise Sensor .................................................................. 170
2.40 "PJ" Outdoor Unit: Faulty Field Setting after Replacing Main
PC Board or Faulty Combination of PC Board ......................................... 171
2.41 "UO" Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage or
Electronic Expansion Valve Failure.......................................................... 172
2.42 "U1" Outdoor Unit: Reverse Phase, Open Phase ...................................... 174
2.43 "U2" Outdoor Unit: Power Supply Insufficient or Instantaneous Failure .... 175
2.44 "U3" Outdoor Unit: Check Operation not executed.................................... 177
2.45 "U4" Malfunction of Transmission Between Indoor Units
and Outdoor Units .................................................................................... 178
2.46 "U5" Indoor Unit: Malfunction of Transmission Between
Remote Controller and Indoor Unit........................................................... 180
2.47 "U7" Indoor Unit: Malfunction of Transmission Between Outdoor Units .... 181
2.48 "U8" Indoor Unit: Malfunction of Transmission Between Main
and Sub Remote Controllers .................................................................... 183
2.49 "U9" Indoor Unit: Malfunction of Transmission Between Indoor Units
and Outdoor Units in the Same System ................................................... 184
2.50 "UA" Improper Combination of Indoor Units and
Outdoor Units/Indoor Units and Remote Controller.................................. 186
2.51 "UC" Address Duplication of Central Remote Controller ............................ 188
2.52 "UE" Malfunction of Transmission Between Centralized Controller
and Indoor Unit......................................................................................... 189
2.53 "UF" System is not Set yet ......................................................................... 191
2.54 "UH" Malfunction of System, Refrigerant System Address Undefined....... 192
3.1 "M1" PC Board Defect ................................................................................ 194
3.2 "M8" Malfunction of Transmission Between Optional Controllers
for Centralized Control ............................................................................. 195
3.3 "MA" Improper Combination of Optional Controllers
for Centralized Control ............................................................................. 197
3.4 "MC" Address Duplication, Improper Setting .............................................. 199
SiUS39-601
Troubleshooting