Daikin SiEN04-306D - Electrical Box Temperature Rise

Troubleshooting SiEN04-306D
130 Service Diagnosis
4.17 Electrical Box Temperature Rise
remote control
Display
L3
Method of
Malfunction
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Malfunction
Decision
Conditions
With the compressor off, the radiation fin temperature is above 80°C (above 75°C in the case of
7.1kW class). (Reset is made when the temperature drops below 70°C.)
Supposed
Causes
 Fin temperature rise due to defective outdoor unit fan
 Fin temperature rise due to short-circuit
 Fin thermistor defective
 Connector in poor contact
 Outdoor unit PCB defective