Daikin SUPER MULTI NX CTXS07JVJU Service Manual page 188

SiUS12-928_B
Troubleshooting
Check No.15
Refer to P.196
Check No.21
Refer to P.200
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 and turn it on
again.
Start operation.
∗ Running current
as shown at right
with relay cable 1
or 2?
NO
Check No. 21
Check the capacitor voltage.
320 ± 50 VDC?
NO
Measure the rectifier input voltage.
Voltage within the
allowable range
(Supply voltage ±
15%)?
NO
YES
Current
Capacitor charged when
(guideline) the indoor unit or outdoor
unit main relay turns on
Rising with increasing
frequency
Time
2 sec
YES
Turn off the power. Disconnect the
harnesses U, V, and W.
Check No. 15
Check with the inverter checker (∗).
Any LED OFF?
NO
Turn off the power and reconnect
the harnesses. Then turn on the
power again and restart operation.
Compressor running?
NO
YES
Troubleshooting for Outdoor Unit
Replace the outdoor unit
PCB.
∗ Inverter checker
Part No.: 1225477
YES
Correct the power supply or
replace the outdoor unit PCB.
YES
Replace the outdoor unit
PCB.
Replace the compressor.
Replace the outdoor unit
PCB.
Check the supply voltage.
(R15326)
180