Blower Motor Not Running - Daikin RXYQ-TA Series Service Manual

Troubleshooting by Error Code
3.7

Blower Motor Not Running

A6
Error Code
Applicable
FXTQ-TA
Models
Outline
Error is issued if the indoor unit determines that the indoor fan motor cannot rotate, regardless of
the rotation command from indoor unit.
Error Decision
Conditions
Error Reset Reset by remote controller
Conditions
Supposed
Causes
Corrective
Actions
187
Determining successive abnormalities
Checks the rotation speed at 5-second intervals using the feedback of the fan motor.
If that figure falls below 50 rpm 5 times successively, it is deemed abnormal operation.
If, during operation, the rotation command is stopped, the 5-second interval check is halted and
the counted number will be cleared.
Determining long-term abnormalities
Checks the rotation speed at 5-second intervals using the feedback of the fan motor.
Performs rotation sampling 720 times (takes approx. one hour), and if the rotation speed falls
below 50 rpm over 100 times, it is deemed abnormal operation.
When the sampling reaches 720 times, the counted number will be cleared and the 720 times
sampling restarts.
If, during this, the rotation command is stopped, the 5-second interval check is halted, but the
counted number will be kept.
When the rotation command is restarted, the checks will resume.
Fan or motor obstruction
Power interruption (low voltage)
Incorrect or loose wiring
Check for obstruction on the fan or motor.
Verify the input voltage at the motor.
Check wiring or tighten wiring connections if needed.
Replace the indoor unit PCB or motor.
SiUS341615E
Service Diagnosis