Daikin Super multi NX E Series Service Manual page 232

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.15
Refer to P.236
Check No.21
Refer to P.239
221
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 (Power 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 analyzer.
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
SiBE121135_A
Replace the outdoor unit
PCB.
∗ Inverter analyzer:
RSUK0917C
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 power supply
voltage.
(R18335)
Service Diagnosis