Part 6 Service Diagnosis - Daikin CTXU25G2V1B Service Manual

1. Service Check Function ......................................................................103
2. Troubleshooting ..................................................................................107
101
Service Diagnosis
1.1 Failure Diagnosis with Multi-Colored Indicator Lamp ...........................103
1.2 Failure Diagnosis by LED Indication ....................................................103
1.3 Failure Diagnosis by Remote Controller...............................................104
2.1 Error Code Indication by Remote Controller ........................................107
2.2 Air conditioner does not run. ................................................................109
2.3 Air conditioner runs but does not cool (heat)........................................112
2.4 When operation starts, safety breaker works. ......................................114
2.5 Air conditioner makes big noise and vibration......................................116
2.6 Air is not humidified enough. ................................................................117
2.7 Indoor Unit PCB Abnormality ...............................................................120
2.8 Freeze-up Protection Control or Heating Peak-cut Control..................121
2.9 Fan Motor (DC Motor) or Related Abnormality.....................................123
2.10 Thermistor or Related Abnormality (Indoor Unit)..................................125
2.11 Humidity Sensor Abnormality ...............................................................126
2.12 Signal Transmission Error (Indoor Unit - Outdoor Unit) .......................127
2.13 Incompatible Power Supply between Indoor Unit and Outdoor Unit ....129
2.14 Incomplete Setting for Hose Length .....................................................130
2.15 Freeze-up Protection in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units) ....................................................131
2.16 Outdoor Unit PCB Abnormality.............................................................132
2.17 OL Activation (Compressor Overload) .................................................133
2.18 Compressor Lock .................................................................................134
2.19 DC Fan Lock ........................................................................................135
2.20 Input Overcurrent Detection .................................................................136
2.21 Discharge Pipe Temperature Control...................................................138
2.22 High Pressure Control in Cooling .........................................................139
2.23 Compressor Sensor System Abnormality ............................................141
2.24 Damper Abnormality.............................................................................142
2.25 Position Sensor Abnormality ................................................................143
2.26 DC Voltage / DC Current Sensor Abnormality .....................................145
2.27 Thermistor or Related Abnormality (Outdoor Unit)...............................146
2.28 Abnormal Temperature in Electrical Box..............................................148
2.29 Temperature Rise in Radiation Fin.......................................................150
2.30 Output Overcurrent...............................................................................152
2.31 Refrigerant Shortage ............................................................................154
2.32 Over Voltage Protection / Low Voltage Protection ...............................156
2.33 Outdoor Unit PCB Abnormality or
Communication Circuit Abnormality .....................................................157
2.34 Signal Transmission Error on Outdoor Unit PCB .................................160
2.35 Fan Motor System Abnormality / Fan Lock ..........................................162
2.36 Heater Wire Abnormality ......................................................................163
2.37 Humidifying Fan Outlet Thermistor Abnormality / Heater
Temperature Abnormality.....................................................................165
SiBE12-908
Part 6
Service Diagnosis