Toshiba RAS-25PAVPG-ND Service Manual page 94

(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. Turn on breaker.
2. After Fan motor operate, off A/C by remote controller.
3. Turn off breaker for a while, then turn it ON.
3.1. If fan motor not operate, it means an unit in Auto-restart operation. (see more detail in P. 45-46)
3.2. If Fan motor still operate, follow the below.
3.2.1. Remove the grille.
3.2.2. Remove the cover terminal by release one screw.
3.2.3. Remove right panel and remove E-box coner.
3.2.4. Check DC voltage with CN301 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 (CN301)
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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FILE NO. SVM-17050
P.C. board
CN301
6 (Blue)
5 (Yellow)
Yellow
4 (White)
3 (Black)
Black
2
1 (Red)
DC
–