Daikin VRV III RXYQ5-54PY1 Service Manual page 211

4. Troubleshooting (OP: Central Remote Controller) ..............................297
5. Troubleshooting (OP: Unified ON/OFF Controller) .............................305
200
3.29 "J9" Outdoor Unit: Malfunction of Subcooling Heat Exchanger
Gas Pipe Thermistor (R5T) ..................................................................257
3.30 "JA" Outdoor Unit: Malfunction of High Pressure Sensor......................258
3.31 "JC" Outdoor Unit: Malfunction of Low Pressure Sensor.......................259
3.32 "L4" Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise .............................................260
3.33 "L5" Outdoor Unit: Inverter Compressor Abnormal ...............................262
3.34 "L8" Outdoor Unit: Inverter Current Abnormal.......................................264
3.35 "L9" Outdoor Unit: Inverter Start up Error..............................................266
3.36 "LC" Outdoor Unit: Malfunction of Transmission Between Inverter
and Control PC Board ..........................................................................268
3.37 "P1" Outdoor Unit: Inverter Over-Ripple Protection ...............................271
3.38 "P4" Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor ....................................................................272
3.39 "PJ" Outdoor Unit: Faulty Field Setting after Replacing Main PC Board
or Faulty Combination of PC Board......................................................274
3.40 "UO" Outdoor Unit: Low Pressure Drop Due to Refrigerant Shortage
or Electronic Expansion Valve Failure..................................................275
3.41 "U1" Reverse Phase, Open Phase.........................................................276
3.42 "U2" Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure...........................................................................277
3.43 "U3" Outdoor Unit: Check Operation not Executed ...............................280
3.44 "U4" Malfunction of Transmission Between Indoor Units ......................281
3.45 "U5" Indoor Unit: Malfunction of Transmission Between
Remote Controller and Indoor Unit.......................................................283
3.46 "U7" Indoor Unit: Malfunction of Transmission Between
Outdoor Units .......................................................................................284
3.47 "U8" Indoor Unit: Malfunction of Transmission Between Main and
Sub Remote Controllers .......................................................................286
3.48 "U9" Indoor Unit: Malfunction of Transmission Between Indoor and
Outdoor Units in the Same System ......................................................287
3.49 "UA" Improper Combination of Indoor and Outdoor Units,
Indoor Units and Remote Controller.....................................................288
3.50 "UC" Address Duplication of Centralized Controller ...............................290
3.51 "UE" Malfunction of Transmission Between Centralized Controller
and Indoor Unit.....................................................................................291
3.52 "UF" System is not Set yet .....................................................................294
3.53 "UH" Malfunction of System, Refrigerant System Address Undefined...295
4.1 "M1" PC Board Defect ............................................................................297
4.2 "M8" Malfunction of Transmission Between Optional Controllers
for Centralized Control .........................................................................298
4.3 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................300
4.4 "MC" Address Duplication, Improper Setting ..........................................302
5.1 Operation Lamp Blinks .........................................................................305
5.2 Display "Under Centralized Control" Blinks (Repeats Single Blink) .....307
5.3 Display "Under Centralized Control" Blinks (Repeats Double Blink) ....310
Si34-601A
Troubleshooting