Daikin R71FUV1 Service Manual page 311

Si20-701_B
Troubleshooting
Caution
Is the
secondary
current of the
inverter higher than A
(*1) for each
phase?
NO
Turn OFF the power
supply.
CHECK 6
Continuity
check in the
power transistor
(IGBT). Is the
continuity
normal?
304
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
CHECK 4
High pressure is high.
NO
YES
Troubleshooting by Remote Controller
Is the
stop valve
opened?
YES
NO
NO
Open the stop
valve.
YES
Remedy the
cause.
Check for
excessive
refrigerant
charging.
CHECK 10
Replace the
outdoor unit
PCB.
Replace the
outdoor unit
PCB.
Compressor
inspection.
Inspect
according to the
diagnosis
procedure for
abnormal noises,
vibration,
operating status,
etc. of the
compressor.