Daikin VRV II RXYQ8MY1K Service Manual page 145

4. Troubleshooting (OP: Central Remote Controller) ..............................215
5. Troubleshooting (OP: Schedule Timer)...............................................220
134
3.28 "J7" Outdoor Unit: Malfunction of
Receiver Outlet Liquid Pipe Thermistor (R6T) .....................................184
3.29 "J9" Outdoor Unit: Malfunction of
Subcooling Heat Exchanger Gas Pipe Thermistor (R5T).....................185
3.30 "JA" Outdoor Unit: Malfunction of High Pressure Sensor......................186
3.31 "JC" Outdoor Unit: Malfunction of Low Pressure Sensor.......................187
3.32 "L4" Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise .............................................188
3.33 "L5" Outdoor Unit: Inverter Compressor Abnormal ...............................189
3.34 "L8" Outdoor Unit: Inverter Current Abnormal.......................................190
3.35 "L9" Outdoor Unit: Inverter Start up Error..............................................191
3.36 "LC" Outdoor Unit: Malfunction of
Transmission Between Inverter and Control PC Board........................192
3.37 "P1" Outdoor Unit: Inverter Over-Ripple Protection ...............................194
3.38 "P4" Outdoor Unit: Malfunction of
Inverter Radiating Fin Temperature Rise Sensor.................................195
3.39 "UO" Outdoor Unit: Low Pressure Drop Due to
Refrigerant Shortage or Electronic Expansion Valve Failure ...............196
3.40 "U1" Reverse Phase, Open Phase.........................................................197
3.41 "U2" Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure...........................................................................198
3.42 "U3" Outdoor Unit: Check Operation not executed................................200
3.43 "U4" Malfunction of Transmission Between Indoor Units ......................201
3.44 "U5" Indoor Unit: Malfunction of Transmission Between
Remote Controller and Indoor Unit.......................................................203
3.45 "U7" Indoor Unit: Malfunction of Transmission Between
Outdoor Units .......................................................................................204
3.46 "U8" Indoor Unit: Malfunction of Transmission Between
Main and Sub Remote Controllers .......................................................206
3.47 "U9" Indoor Unit: Malfunction of Transmission Between
Indoor and Outdoor Units in the Same System....................................207
3.48 "UA" Improper Combination of Indoor and Outdoor Units,
Indoor Unit and Remote Controller.......................................................209
3.49 "UC" Address Duplication of Centralized Controller ...............................210
3.50 "UE" Malfunction of Transmission Between
Centralized Controller and Indoor Unit .................................................211
3.51 "UF" System is not Set yet .....................................................................213
3.52 "UH" Malfunction of System,
Refrigerant System Address Undefined ...............................................214
4.1 "M1" PC Board Defect ............................................................................215
4.2 "M8" Malfunction of Transmission Between
Optional Controllers for Centralized Control.........................................216
4.3 "MA" Improper Combination of Optional Controllers for
Centralized Control...............................................................................217
4.4 "MC" Address Duplication, Improper Setting ..........................................219
5.1 "UE" Malfunction of Transmission Between
Centralized Controller and Indoor Unit .................................................220
5.2 "M1" PC Board Defect ............................................................................222
5.3 "M8" Malfunction of Transmission Between
Optional Controllers for Centralized Control.........................................223
Si39-502A
Troubleshooting