Service manual

SiEBE12-625 Troubleshooting
Service Diagnosis 229
5.22 Electrical Box Temperature Rise
Remote
Controller
Display
L3
Outdoor Unit LED
Display
A 5 1 4 2 4 3 1 4 4
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 for 80 · 90
class).
 The error is cleared when the temperature drops below 70°C (below 65°C for 80 · 90 class).
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