Daikin RXYQ-TA Series Service Manual page 271

SiUS341615E
Troubleshooting
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
12/14 ton classes are
equipped with 2 compressors.
Check for the compressor 1 or
2 applicable to the error code
P4 while in monitor mode of
the outdoor unit PCB.
Make measurement of
resistance of the radiation
fin thermistor.
Is the
resistance of the
relevant thermistor
normal?
YES
The
insulation
resistance of the
relevant inverter compressor
is not more than
100 kΩ.
NO
The insulation
resistance of the relevant
fan motor is not more
than 1 MΩ.
NO
Turn ON the
power supply.
Does the error
recur?
NO
NO
YES
YES
YES
Troubleshooting by Error Code
Replace the inverter PCB.
( 1)
1
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
Replace the compressor.
RXYQ72-120TA: M1C
RXYQ144/168TA: M1C, M2C
Replace the fan motor.
Replace the inverter PCB.
( 1)
Continue operation.
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