Daikin SUPER MULTI NX CTXS07JVJU Service Manual page 185

Troubleshooting for Outdoor Unit
Troubleshooting
18 class
Check No.15
Refer to P.196
Check No.18
Refer to P.198
Check No.20
Refer to P.199
177
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 No. 18
Check the discharge pressure.
OK?
YES
Check No. 20
Check the short circuit of the diode
bridge.
Normal?
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 No.15
Check with the inverter checker (∗).
Any LED OFF?
NO
NO
NO
NO
NO
NO
∗ Inverter checker
Part No.: 1225477
YES
SiUS12-928_B
Correct the power supply.
Replace the stop valve.
Replace the outdoor unit
PCB.
Reconnect the electrical
components or compressor
harnesses as specified.
Replace the outdoor unit
PCB.
Correct the power supply
or replace the outdoor unit
PCB.
Replace the compressor.
(R15300)
Service Diagnosis