Inverter Radiation Fin Temperature Abnormality - Daikin VRV RXYMQ-A Series Service Manual

SiME332106E

5.50 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 outdoor unit main PCB (RXYMQ4AVMK)
 Defective inverter PCB (RXYMQ4-6AYFK)
 Defective fan PCB (RXYMQ4-6AYFK)
 Defective compressor
 Defective fan motor
Part 6 Service Diagnosis
Troubleshooting by Error Code
237