Daikin RXYQ-TA Series Service Manual page 233

SiUS341615E
Service Diagnosis
resistance of the relevant
compressor is low
Power OFF
compressor has a
wiring disconnection
compressor, and
then check for the
operation. Does the
Power ON
compressor started
up at high differential
pressure (0.5 MPa
Power OFF
The error recurs at
Power ON
Replace the inverter
Power OFF
PCB. ( 2)
The error recurs
Power ON
CHECK 4 Refer to page 295.
A
The insulation
YES
(< 100 kΩ)
NO
The relevant
YES
in it.
NO
Restart the
NO
error recur?
YES YES
Has the
YES
(72.5 psi) or
more)?
NO
CHECK 4
NO
Is the power
transistor
normal?
YES
NO
startup.
YES
NO
at startup.
YES
Troubleshooting by Error Code
Replace the compressor. ( 1)
( 1)
RXYQ72-120TA: M1C
RXYQ144/168TA: M1C, M2C
Quit work.
Pressure equalization failure
may have occurred. Check for
the refrigerant system.
Pressure equalization failure.
Check for the refrigerant
system.
Replace the inverter PCB. ( 2)
2
RXYQ72-120TA: A3P
RXYQ144/168TA: A3P, A6P
Continue operation.
The error could have
resulted from instantaneous
power failure.
Continue operation.
Replace the compressor. ( 1)
This is not a failure of the
inverter PCB. Reinstall the
PCB.
220