Indoor Fan Motor (Dc Motor) Or Related Abnormality - Daikin FTX-N Series Service Manual

SiUS091601EA
5.3

Indoor Fan Motor (DC Motor) or Related Abnormality

A6
Error Code
Method of Error
The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal
Detection fan motor operation.
Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and is
Conditions less than 50% of the maximum fan motor rotation speed.
Supposed  Remarkable decrease in power supply voltage
Causes  Layer short inside the fan motor winding
 Breaking of wire inside the fan motor
 Breaking of the fan motor lead wires
 Defective capacitor of the fan motor
 Defective indoor unit PCB
Troubleshooting
FTX09/12/15NMVJU
Part 6 Service Diagnosis
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.
A Go to the next page
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
Troubleshooting for FTX, FVXS Series
Correct the connection.
Remove the foreign matters.
(R23939)
128