Daikin SUPER MULTI NX G Series Service Manual

Troubleshooting for Outdoor Unit SiUS12-928_B
177 Service Diagnosis
Troubleshooting 18 class
Check No.15
Refer to P.196
Check No.18
Refer to P.198
Check No.20
Refer to P.199
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?
(R15300)
NO
NO
NO
YES
YES
NO
YES
YES
Check No. 20
Check the short circuit of the diode
bridge.
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.
Replace the outdoor unit
PCB.
∗ Inverter checker
Part No.: 1225477
Normal?
NO
YES
Check No. 18
Check the discharge pressure.
Replace the stop valve.
OK?
320 ± 50 VDC?
Any LED OFF?

Daikin SUPER MULTI NX G Series Specifications

General

Brand	Daikin
Model	SUPER MULTI NX G Series
Category	Air Conditioner
Language	English