Daikin FTKS20D2VMWL, Service Manual

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SiENBE04-507A Troubleshooting
Service Diagnosis 135
4.20 Electrical Box Temperature Rise
Remote
Controller
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. 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