Daikin SUPER MULTI NX G Series Service Manual page 139

SiUS12-928_A
Troubleshooting
24/32 class
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power.
Check the power supply voltage.
Voltage as rated?
YES
Check the connection.
Electrical
components or
compressor harnesses
connected as
specified?
YES
Turn on the power.
Check the electrolytic capacitor
voltage.
320 ± 50 VDC?
YES
Turn off the power. Disconnect the
harnesses U, V, and W.
Check with the inverter checker (∗).
Any LED OFF?
NO
NO
NO
NO
∗ Inverter checker
Part No.: 1225477
YES
Troubleshooting
Correct the power supply.
Reconnect them as
specified.
Replace the outdoor unit
PCB.
Correct the power supply or
replace the outdoor unit
PCB.
Replace the compressor.
(R11471)
130