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Troubleshooting
SiBE12-933_A
180
Service Diagnosis
ATX20-35G
Check No.18
Refer to P.222
Check No.19
Refer to P.223
Check No.20
Refer to P.224
(R8276)
)
(
Turn off the power.
(Unplug the power cable or turn
the breaker OFF.)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Correct?
NO
Check the connector for connection.
YES
YES
Foreign matters in or
around the fan?
NO
Check No. 20
Check the fan motor for breakdown
or short-circuit.
Resistance is
between 10
Ω
and
20
Ω
?
Turn the power on again.
Check No. 18
Check output of the indoor unit PCB.
Is motor control
power voltage DC
15V generated?
Try to rotate the fan.
Fan rotates smoothly?
Check No. 19
Check the indoor unit PCB for
pulse input.
Is rotation pulse
input DC 5V or
higher generated?
NO
YES
YES
YES
YES
NO
NO
NO
∗
To secure the connection,
once disconnect the connector
and then reconnect it.
Correct the connection.
Remove
Replace the fan motor.
Note: If the connector is
disconnected while the
power is supplied, the motor
becomes broken.
Turn off the power before
connecting the connector.
Replace the indoor unit PCB (2)
Replace the indoor unit PCB (2)
Replace the indoor unit PCB (2)
Replace the fan motor.