Radiation Fin Temperature Rise - Daikin FTX20JV1B Service Manual

Troubleshooting

4.23 Radiation Fin Temperature Rise

L4
Error Code
Method of Error A radiation fin temperature rise is detected by checking the radiation fin thermistor with the
compressor on.
Detection
Error Decision
Conditions
Supposed
Causes
81
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
A (°C) B (°C)
93 78
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.
SiBE041010EA
Service Diagnosis