Troubleshooting SiUS04-904
Service Diagnosis 107
Troubleshooting
Check No.10
Refer to P.148
Check the voltage of the indoor
unit-outdoor unit connection wires
between No. 1 and No. 3, and
between No 2 and No. 3.
Check No.10
Check power supply waveform.
YES
YES
Replace indoor unit control
PCB .
Locate the cause of the
disturbance of the power supply
waveform, and correct it.
NO
(R8300)
NO
YES
YES
NO
NO
Caution
Be sure to turn off the power switch before connecting or disconnecting
the connector, or parts damage may occur.
YES
NO
Correct the indoor unit-outdoor
unit connection wires.
Diagnose the outdoor unit.
Replace the connection wires
between the indoor and
Replace fan motor and outdoor
unit PCB .
Does fan rotate
smoothly?
Is LED A flashing?
Is the voltage 0 V?
Is there any
disturbance?
Is there any wiring
error?
Check the indoor unit-outdoor unit
connection wires.
Check the outdoor unit's LED A.
Rotate fan by hand.
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