Fan Motor Or Related Abnormality - Daikin Super multi NX E Series Service Manual

Troubleshooting for SA Indoor Unit
6.3

Fan Motor or Related Abnormality

6.3.1 AC Motor (FFQ, FHQ, FDBQ Series)
A6
Error Code
Method of Error The signal from the fan motor detects abnormal fan speed.
Detection
Error Decision
The fan rotations are not detected while the output voltage to the fan is at its maximum
Conditions
Supposed
Causes
Troubleshooting
187
Disconnection, short circuit or disengagement of connector in fan motor harness
Defective fan motor (disconnection, poor insulation)
Abnormal signal from fan motor (faulty circuit)
Defective indoor unit PCB
Momentary fluctuation of power supply voltage
Fan motor lock
(Caused by motor or other external factors)
Fan does not rotate due to tangled foreign matters.
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn off the power supply.
Is there any
foreign matter around
the fan?
NO
Is the
harness from the
fan motor correctly
connected to the
indoor unit
PCB?
YES
Check the fan motor
connector. (See the Note.)
Is there
short circuit between
the terminals?
YES
YES
NO
NO
SiBE121135_A
Remove the foreign matter.
Connect the connector correctly.
FFQ series: X20A
FHQ series: X20A, X26A
FDBQ series: X21A
Replace the fan motor.
Replace the indoor unit PCB.
(R18391)
Service Diagnosis