Hitachi RAS-10JH4 - Main Circuit Operation Details; 7. Fan Motor Drive Circuit

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Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pin 15 - 22 of
microcomputer.
As the microcomputer’s outputs change as shown in Fig.4-2, the coils of the auto sweep motor is excite to turn the
Micro computer pins
Step width : 10ms
Horizontal air deflectors
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22
123456 78
15
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Table 4-1 Auto sweep Motor Rotation
Rotation angle per step ( ˚ ) Time per step (ms.)
0.0882 10
Horizontal air deflectors
Ventilation Damper
Fig.4-2 Microcomputer Output Signals
Fig.4-1
rotor. Table 4-1 shows the rotation angle of Horizontal Air Deflector, Ventilation Damper.
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4. Snap Motor Circuit (Horizontal Air Deflector, Ventilation Damper)
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