Abnormal Temperature In Electrical Box - Daikin CTXU25G2V1B Service Manual

SiBE12-908

2.28 Abnormal Temperature in Electrical Box

L3
Remote
Controller Display
Method of Temperature rise in the electrical box is identified based on the temperature of the radiation fin
detected by the fin thermistor with the compressor off.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
With the compressor off, the radiation fin temperature is above 80°C.
The error is cleared when the temperature drops below 70°C.
Fin temperature rise due to defective outdoor fan
Fin temperature rise due to short circuit
Detection error due to defective fin thermistor
Detection error due to improper connection of connector
Detection error due to defective outdoor unit PCB
Troubleshooting
148