Daikin 2MXS40H2V1B Service Manual page 174

Troubleshooting for RA Indoor Unit
Troubleshooting CTXS, FTXS20/25K, FTX, ATX Series
Check No.03
Turn off the power supply.
Refer to P.207
(Unplug the power cable or turn
the breaker off.)
Check the connector for
connection.
Rotate the fan by hand.
Check No. 03
Check the fan motor for
breakdown or short circuit.
Turn the power on again.
Check No. 03
Check the motor control voltage.
Check No. 03
Check the indoor unit PCB for
rotation pulse.
163
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
NO
OK?
YES
YES
Foreign matters in or
around the fan?
NO
NO
Fan rotates smoothly?
YES
NO
Resistance OK?
YES
Is the motor control
NO
voltage 15 VDC
generated?
YES
NO
Is the rotation pulse
generated?
YES
Note: The motor may break when the
motor connector is disconnected
with the power supply on.
(Turn off the power supply before
connecting the connector also.)
∗ To secure the connection,
once disconnect the connector
and then reconnect it.
Abnormal
sound occurs?
YES
Is the rubber cushion
properly fitted?
NO
SiBE121123_A
Correct the connection.
Remove the foreign matters.
NO
Rubber
cushion
Bearing
rubber
cushion
YES
Replace the bearing rubber
cushion.
Correct the position of
rubber cushion or replace
the rubber cushion.
Replace the indoor fan motor.
Replace the indoor unit PCB (1).
Replace the indoor fan motor.
Replace the indoor unit PCB (1).
Service Diagnosis
(R18153)