SiBE12-908 Troubleshooting
Service Diagnosis 148
2.28 Abnormal Temperature in Electrical Box
Remote
Controller Display
L3
Method of
Malfunction
Detection
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
Decision
Conditions
With the compressor off, the radiation fin temperature is above 80°C.
The error is cleared when the temperature drops below 70°C.
Supposed
Causes
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
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