Daikin VRV S RXQ4/5ARV1 - Radiation Fin Temperature Abnormality

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 289
5.52 Radiation Fin Temperature Abnormality
Applicable
Models
RXQ4/5AR, RXMQ6/8AR
Error Code P4
Method of Error
Detection
Detect the resistance of the following thermistors during the compressor stops running:
(1) Radiation fin thermistor
(2) Thermistor located in PCB circuit
Error Decision
Conditions
When the resistance of the thermistor comes to a value equivalent to open or short circuit.
Error is not decided while the unit operation is continued.
P4 will be displayed by pressing the inspection button.
Supposed
Causes
 Defective radiation fin temperature thermistor
 Defective outdoor unit main PCB (RXQ4/5AR, RXMQ6AR)
 Defective inverter PCB (RXMQ8AR)
 Defective fan PCB (RXMQ8AR)
 Defective compressor
 Defective fan motor