Troubleshooting
SiMT041311E
175
Service Diagnosis
Check No.11
Refer to P.183
NO
(R19687)
Disturbance?
YES
YES
Check the connecting wires
between the indoor unit and the
outdoor unit.
Check wrong wiring, insulation
among wiring, insulation to the earth
OK?
NO
Check No.11
Check the power supply
waveform.
(
)
From the previous page
Locate the cause of the
disturbance of the power
supply waveform, and
correct it.
YES
Does the outdoor fan
rotate smoothly?
NO
Rotate the outdoor fan by hand.
Replace the outdoor fan
motor and outdoor unit
PCB.
Reconnect the connecting
wires.
YES
Check the fuse on the indoor unit
PCB (A1P).
Does the fuse have
continuity?
NO
NO
Does the indoor fan
rotate smoothly?
YES
Replace the indoor fan
motor.
Replace the indoor unit
PCB (A1P).
Replace the indoor unit
PCB (A1P).