Toshiba RAS-B10J2FVG-E Service Manual page 95

(4) 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 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 indoor unit controller. (remove 1 screw.)
3. Check DC voltage with CN36 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.
(Check output DC voltage of fan motor on P.C. board.)
Measure voltage between 3 (GND : BLACK)
and 5 (V line : YELLOW) of motor connector (CN36)
while indoor fan motor is rotating.
DC 1.0V or more
P.C. board is defective.
Replace P.C. board.
Under DC 1.0V
Motor is defective.
Replace motor.
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P.C. board
CN36
6 (Blue)
5 (Yellow)
Yellow
4 (White)
Black 3 (Black)
2
1 (Red)
DC
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