Service Manual

SiUS091133 Troubleshooting
Service Diagnosis 130
Troubleshooting 24/30/36 class
Check No.15
Refer to P.146
Check No.18
Refer to P.150
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?
(R15892)
NO
NO
YES
NO
YES
YES
Check No. 15
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 the electrical
components or compressor
harnesses as specified.
∗ Inverter checker
Part No.: 1225477
320 ± 50 VDC?
Any LED OFF?
NO
YES
Check No. 18
Check the discharge pressure.
Replace the stop valve.
OK?