SiMT041311E
Troubleshooting
Service Diagnosis
138
Troubleshooting
Check No.02
Refer to P.182
Caution
OK?
NO
YES
YES
NO
Check No. 02
NO
YES
NO
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check the connector for
connection.
Note: The motor may break when the
motor connector is disconnected
while the power is turned on.
(Be sure to turn off the power
before reconnecting the connector.)
∗
To secure the connection,
once disconnect the connector
and then reconnect it.
Foreign matters in or
around the fan?
Rotate the fan by hand.
Check the fan motor for
breakdown or short circuit.
Fan rotates smoothly?
Resistance OK?
Correct the connection.
NO
Correct the power supply.
Remove the foreign matters.
Replace the indoor fan motor.
Turn off the power. (Unplug the
power cable or turn the breaker
off.)
(R19724)
YES
NO
YES
Abnormal
sound occurs?
Is the bearing
rubber cushion
properly fitted?
NO
YES
Correct the position of bearing
rubber cushion or replace the
bearing rubber cushion.
Replace the bearing rubber
cushion.
Replace the indoor unit PCB
(A1P).
Bearing rubber
cushion
Check the power supply voltage.
YES
Is the
power supply voltage
fluctuation within ±10% from
the rated value?