Daikin FTXS09HVJU - Radiation Fin Temperature Rise

SiUS04-904 Troubleshooting
132 Service Diagnosis
4.19 Radiation Fin Temperature Rise
Remote
Controller
Display
L4
Method of
Malfunction
Detection
A radiation fin temperature rise is detected by checking the radiation fin thermistor with the
compressor on.
Malfunction
Decision
Conditions
If the radiation fin temperature with the compressor on is above 194°F (90°C).
 If a radiation fin temperature rise takes place 4 times successively, the system is shut down.
 The error counter is reset 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