SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
203
Troubleshooting
Compressor inspection
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Failure
occurs again after
restarting the unit.
Failure
occurs again after
restarting the unit.
Compressor
coils are disconnected.
Is the
insulation resistance
of the compressor 100 k
Ω
or less?
Are the wiring
and connection to the
compressor
normal?
Are the
compressor lead
wires normal?
Open the stop valve.
NO
NO
NO
YES
YES
NO
NO
YES
YES
YES
NO
NO
Power OFF
Power ON
Is the stop valve open?
YES
YES
YES
Continue the operation.
NO
Power OFF
Power ON
Replace the inverter PCB.
CHECK 4
Is the power transistor
normal?
Replace the compressor
lead wires.
Correct the wiring and
connection.
Replace the inverter
compressor.
Replace the inverter
compressor.
Replace the inverter
PCB.
Continue the operation.
Momentary power
failure is possible.
Replace the inverter
compressor.
CHECK 4