Toshiba RAS-24UKX - Indoor fan motor automatically starts to rotate.; Compressor does not operate.

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FILE NO. SVM-01010
DC
P.C. board
CN10
6 (Blue)
5 (Yellow)
4 (White)
3 (Black)
2 –
1 (Red)
Black
Yellow
9-6-3. Indoor fan motor automatically starts to rotate by turning on power supply.
<Cause>
The IC is built in the indoor fan motor. Therefore the P.C. board is also mounted to the inside of the motor.
If the P.C. board is soldered imperfectly or the IC is defective, the fan motor may automatically rotate by turning
on power supply.
<Inspection procedure>
(1) Remove the front panel. (Remove 4 screws.)
(2) Remove the cover of the fan motor lead wires.
(3) Check DC voltage with CN10 connector while the fan motor is rotating.
NOTE:
• Do not disconnect the connector while the fan motor is rotating.
• Use a thin test rod.
Indoor fan starts rotating when power supply is turned on.
Measure voltage between 2
(GND:BLACK) and 3 (V line:YELLOW) of motor connector
(CN10) while indoor fan motor is rotating.
DC 1.0V or more
Under DC 1.0V
Replace P.C. board.
Replace motor.
(Check output DC voltage of fan motor on P.C. board.)
Motor is defective.
P.C. board is defective.