Daikin Super multi NX E Series Service Manual page 200

Troubleshooting for SA Indoor Unit
6.3.2 DC Motor (FCQG Series, FBQ35/50C8VEB)
A6
Error Code
Method of Error The signal from the fan motor detects abnormal fan speed.
Detection
Error Decision
The fan rotation does not increase.
Conditions
Supposed
Causes
Troubleshooting
189
Foreign matters stuck in the fan
Disconnection of connector
Defective fan motor
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power supply and
wait for 10 minutes.
Is there any
foreign matter around
the fan?
NO
Is the
connector from the
fan motor properly
connected to the
indoor unit
PCB?
YES
Disconnect
the fan motor
connector. Can you rotate
the fan smoothly by
hand?
YES
Check the fan motor
connector. (See the Note.)
Is the
resistance
between each pin
higher than
1Ω?
YES
YES
NO
NO
NO
SiBE121135_A
Remove the foreign matter.
Connect the connector properly.
FCQG: X20A, relay connector
FBQ35/50C8VEB: X8A
Replace the indoor fan motor.
Replace the indoor fan motor
and the indoor unit PCB.
FCQG: A1P
FBQ35/50C8VEB: A2P
Replace the indoor unit PCB.
(R19168)
Service Diagnosis