Troubleshooting
Si12-714
208
Service Diagnosis
5.21
Radiation Fin Temperature Rise
Remote
Controller
Display
L4
Outdoor Unit LED
Display
A
5
1
1
2
1
3
1
4
4
Method of
Malfunction
Detection
A radiation fin temperature rise is detected by checking the radiation fin temperature being
detected by the fin thermistor with the compressor on.
Malfunction
Decision
Conditions
The radiation fin temperature with the compressor on is above
°C.
The error is cleared when the temperature drops below
°C.
If a radiation fin temperature rise takes place 255 times successively, the system will be shut
down.
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
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
Silicon grease is not applied properly on the heat radiation fin after replacing outdoor unit
PCB
~80 class
90
85
80·90 class
85
80
100 class
90
85
