Electrical Box Temperature Rise - Daikin Super Multi NX B series Service Manual

Si12-308
5.20

Electrical Box Temperature Rise

L3
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Malfunction
Detection
Malfunction With the compressor off, the radiation fin temperature is above 80°C (above 75°C in the case of
8.0 · 9.0kW class). (Reset is made when the temperature drops below 70°C.)
Decision
Conditions
Supposed
Causes
Service Diagnosis
5 1 4 2 4 3 1 4
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
4
Troubleshooting
197