SiBE121123_A
Troubleshooting for Outdoor Unit
Service Diagnosis
202
7.17 Radiation Fin Temperature Rise
Error Code
L4
Method of Error
Detection
A radiation fin temperature rise is detected by checking the radiation fin temperature with the
compressor on.
Error Decision
Conditions
The radiation fin temperature with the compressor on is above
A
°C.
The error is cleared when the temperature drops below
B
°C
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
Defective outdoor fan motor
Short circuit
Defective radiation fin thermistor
Disconnection of connector
Defective outdoor unit PCB
Silicon grease is not applied properly on the radiation fin after replacing the outdoor unit
PCB.
A
(°C)
B
(°C)
40 class
95
85
50 class
92.5
85
