Daikin VRVII Manual page 206

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Turn OFF the power
supply once, and turn ON
again.
Does
the power
supply normally
come back
ON?
CHECK 4
Check if the power
transistor is
normal.
CHECK 4
Check if the power
transistor of the fan
driver is
normal.
CHECK 4
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
NO
NO
YES
resistance of the
compressor 100kΩ
NO
YES
Refer to P.354.
Is the
insulation
or more?
YES
It is supposed
that the error
results from
external causes
other than
failures (e.g.
exogenous
noises or
thunder).
NO
Replace the
compressor and
compressor
inverter PCB at
the same time.
Replace the
inverter PCB.
Replace the
compressor
inverter PCB and
fan inverter PCB.
Replace the
inverter PCB.
201