Service Manual

Troubleshooting SiUS041829E
92 Part 6 Service Diagnosis
Reference
Reference
Reference
Troubleshooting
Check No.15 Refer to P.116
Check No.17 Refer to P.118
Check No.18 Refer to P.119
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
∗ An input overcurrent may result from wrong internal wiring. If the system is interrupted by an input
overcurrent after the wires have been disconnected and reconnected for part replacement, check the
(R21863)
NO
YES
YES
NO
Start operation and measure the
input current.
Check No. 18
Check the discharge pressure.
Check No. 17
Check the installation condition.
Check No.15
Check with the inverter analyzer.
Turn off the power and disconnect
the harnesses U, V, and W.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Replace the outdoor unit
PCB (main PCB).
Correct the power supply or
replace the outdoor unit
PCB (main PCB).
Any LED off?
Input current
flowing above its stop level?
∗ Inverter analyzer:
RSUK0917C