Troubleshooting SiENBE04-808_A
127 Service Diagnosis
Troubleshooting 20/25/35/42 class
Check No.29
Refer to P.153
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
NO
YES
Turn off the power.
Check the connection.
Check the power supply voltage.
Correct the power supply.
Voltage as rated?
(R11380)
NO
NO
NO
YES
YES
NO
YES
YES
Check No. 29
Check the short circuit of the diode
bridge.
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.
Replace the outdoor unit
PCB or the outdoor fan.
∗ Inverter checker
Part No.: 1225477
Normal?
320 ± 50 VDC?
Any LED OFF?
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