Service Manual

SiUS121502E Troubleshooting for Outdoor Unit
Service Diagnosis 159
Troubleshooting
Check No.15
Refer to P.171
Check No.21
Refer to P.175
(R22271)
Caution
YES
2 sec
Time
NO
YES
YES
NO
NO
NO
YES
YES
NO
Current
(guideline)
Turn off the power. Then, turn on
the power to restart the system.
Start operation.
Check No. 21
Check the capacitor voltage.
Measure the rectifier input voltage.
Turn off the power. Disconnect the
harnesses U, V, and W.
Turn off the power and reconnect
the harnesses. Then turn on the
power again and restart operation.
Check No.15
Check with the inverter analyzer.
∗ Inverter analyzer:
RSUK0917C
+ 100
- 50
Voltage
within the allowable
range (Power supply
voltage ± 15%)?
Replace the outdoor unit
PCB (main PCB).
Check the power supply
voltage.
Replace the outdoor unit
PCB (main PCB).
Replace the outdoor unit
PCB (main PCB).
Replace the compressor.
Capacitor charged when
the indoor unit or outdoor
unit main relay turns on
Rising with increasing
frequency
Correct the power supply or
replace the outdoor unit PCB
(main PCB).
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
∗ Running current
as shown at right
with relay cable 1
or 2?
Within 320 VDC?
Any LED OFF?
Compressor running?