Inverter Radiation Fin Temperature Abnormality - Daikin RXQ12AHR Service Manual

SiAF341904E

5.45 Inverter Radiation Fin Temperature Abnormality

Applicable All outdoor unit models
Models
P4
Error Code
Method of Error Detect the resistance of the following thermistors during the compressor stops running:
Detection (1) Radiation fin thermistor
(2) Thermistor located in PCB circuit
Error Decision
When the resistance of the thermistor comes to a value equivalent to open or short circuit.
Conditions
Error is not decided while the unit operation is continued.
P4 will be displayed by pressing the inspection button.
Supposed
 Defective radiation fin temperature thermistor
Causes  Defective inverter PCB
 Defective fan PCB
 Defective inverter compressor
 Defective fan motor
Part 6 Service Diagnosis
Troubleshooting by Error Code
257