Daikin R71FUV1 Service Manual page 319

Si20-701_B
Troubleshooting
Caution
Power
OFF
312
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Is the stop
valve open?
YES
Are wire
connections
properly made
(according to the
Wiring
Diagram)?
YES
Disconnect the cable from
the compressor, and then
check the compressor for
the insulation resistance.
The
insulation
resistance is low (i.e.,
not more than
100kΩ.)
NO
Check the power
transistor on the inverter
PCB using a multiple
tester.
Does
the power
transistor have any
abnormalities?
NO
Connect the compressor
cable, and then restart
the operation.
A
Troubleshooting by Remote Controller
NO
NO
Check the
compressor
cable for any
disconnection
or flaws.
YES
YES
Open the stop
valve.
Rectify the wire
connections.
Replace the
compressor.
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.