Daikin Super multi NX E Series Service Manual page 186

Troubleshooting for RA Indoor Unit
Troubleshooting
CTXS, FTXS20/25K Series
Check No.03
Refer to P.231
175
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn off the power supply.
(Unplug the power cable or turn
the breaker off.)
Check the connector for
connection.
OK?
YES
Foreign matters in or
around the fan?
NO
Rotate the fan by hand.
Fan rotates smoothly?
YES
Check No. 03
Check the fan motor for
breakdown or short circuit.
Resistance OK?
YES
Turn the power on again.
Check No. 03
Check the motor control voltage.
Is the motor control
voltage 15 VDC
generated?
YES
Check No. 03
Check the indoor unit PCB for
rotation pulse.
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.
NO
YES
NO
Abnormal
sound occurs?
YES
Is the rubber cushion
properly fitted?
NO
NO
NO
NO
SiBE121135_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)