SiENBE04-808_A Troubleshooting
Service Diagnosis 128
Troubleshooting 50 class
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
Check the power supply voltage.
Check the connection.
Turn off the power.
Correct the power supply.
Voltage as rated?
(R11471)
NO
NO
YES
NO
YES
YES
Check with the inverter checker (∗).
Turn off the power. Disconnect the
harnesses U, V, and W.
Turn on the power.
Check the electrolytic capacitor
voltage.
Electrical
components or
compressor harnesses
connected as
specified?
Replace the outdoor unit
PCB.
Replace the compressor.
Correct the power supply or
replace the outdoor unit
PCB.
Reconnect them as
specified.
∗ Inverter checker
Part No.: 1225477
320 ± 50 VDC?
Any LED OFF?
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