Daikin VRV RXYQ72-384XAYCA Service Manual page 329

SiUS342004EB
3.56.2 Inverter Radiation Fin Temperature Abnormality (Fan PCB)
Applicable
All outdoor unit models
Models
P4
Error Code
Sub code: 02, 03, 15-18
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
 Defective fan PCB
Causes
 Defective fan motor
Troubleshooting
Part 6 Service Diagnosis
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 for M1F Master / Slave 1 / Slave 2
P4-03/16/18: Fan PCB for M2F Master / Slave 1 / Slave 2
The insulation
resistance of the relevant
fan motor is less than
1 M.
NO
Turn ON
the power supply.
Does the error
recur?
NO
Troubleshooting by Error Code
YES
Replace the fan motor
(M1F, M2F).
YES
Replace the fan PCB (A5P,
A6P).
Continue operation.
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