Daikin R71FUV1 Service Manual page 184

Troubleshooting by Remote Controller
Troubleshooting
Caution
Check the installation
conditions.
RZQ-C
RZQ-C/K, RZR-KU/HU
RZQG
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
Is the stop
valve open?
YES
Is the
UVWN wiring
normal?
YES
Is high
differential
pressure at
starting?
NO
Check and
see whether
compressor is short-
circuited or
ground.
NO
RZQ-H, RZQ(S)-B/C
Are
inverter output
voltages the same for
3 phases?
YES
Does
low or high
pressure vary
even instantaneously
when restarting
compressor?
NO
NO
Open the stop
valve.
NO
Connect
correctly.
YES
Remedy the
cause.
YES
Replace the
compressor.
NO
Replace the
inverter PCB.
YES
Replace the
compressor.
Si20-701_B
177