Daikin R71FUV1 Service Manual page 306

Troubleshooting by Remote Controller
Check the power
transistor on the inverter
Power
PCB using a multiple
OFF
tester.
Connect the compressor
cable, and then restart the
operation.
Power
ON
A
Does
the power
transistor have any
abnormalities?
NO
Is a
difference
between high
pressure and low
pressure prior to
startup
0.2MPa?
YES
The error
is displayed again.
YES
YES
Replace the
inverter PCB.
∗The inverter is
likely to have
got defective
due to the error
of the
compressor.
After the
completion of
replacement,
be sure to
check the
compressor.
NO
Defective
pressure
equalization:
Check the
refrigerant
system.
NO
End of
It can take a
measures:
maximum of
Check the
60 minutes to
refrigerant
determine the
system.
error.
Check of
compressor:
Check the
compressor for
abnormal
sounds,
vibration,
operating
conditions, and
others according
to the
Compressor
Diagnosis
Procedure.
Si20-701_B
299