Daikin Aurora Series Service Manual page 264

Troubleshooting by Error Code
2.54.2 Inverter Radiation Fin Temperature Abnormality (Fan PCB)
P4
Error Code
Sub code: 02, 03, 15-18
Applicable All outdoor unit models
Models
Method of Error
Detects the resistance of the thermistor located inside the fan PCB circuit while the fan motor is not
Detection in operation:
Error Decision
The resistance of the thermistor comes to a value equivalent to open or short circuit.
Conditions
Supposed
Causes
Troubleshooting
251
Defective fan PCB
Defective fan motor
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check for fan PCB applicable to the error code P4 while in
monitor mode.
P4-02/15/17: Fan PCB Master / Slave 1 / Slave 2
P4-03/16/18: Fan PCB Master / Slave 1 / Slave 2
resistance of the relevant
fan motor is not more
the power supply.
The insulation
YES
than 1 MΩ.
NO
Turn ON
YES
Does the error
recur?
NO
SiUS341802E
Replace the fan motor.
Replace the fan PCB.
RXLQ-TATJU,
RXLQ-TAYDU: A4P, A5P
RXLQ-TAYCU,
RXYQ-TAYCU: A5P, A6P
Continue operation.
Service Diagnosis