Trouble shooting
Si04-115
82
Service Diagnosis
Troubleshooting
∗
Internal wiring errors can cause an input over current. If the equipment stops due to an input
over current after the wires are disconnected and connected again for parts replacement, etc.,
check for wiring errors.
Check No.3
Refer to P.85
Check No.4
Refer to P.87
Check No.12
Refer to P.90
Check No.6
Refer to P.89
Re-start the equipment, and
measure the input current.
Check the conductivity of the
electrolytic capacitor of the main
inverter circuit.
YES
YES
Replace the outdoor unit PCB.
Replace the outdoor unit PCB.
Replace the outdoor unit PCB.
Replace the electrolytic
capacitor.
Is
the measured
value higher than the input
current stop setting?
NO
YES
Is there conductivity?
NO
YES
Are the U, V
and W phases output in good
balance?
NO
NO
(R1959)
Is it normal?
Check No. 4
Power transistor output check
Check No. 12
Discharge pressure check
Check No. 6
Installation condition check
Check No. 3
Power transistor check
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
