Daikin FTXG20LV1BW, Service Manual

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Troubleshooting SiBE041401E
89 Service Diagnosis
4.24 Radiation Fin Temperature Rise
Error Code
L4
Method of Error
Detection A radiation fin temperature rise is detected by checking the radiation fin thermistor with the
compressor on.
Error Decision
Conditions
„
If the radiation fin temperature with the compressor on is above A °C.
„
The error is cleared when the radiation fin 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)
20/25/35 class 98 78
50 class 85 56