– 63 –
4. Auto Sweep Motor Circuit
●
Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pins
15
–
18
of microcomputer.
●
As the microcomputer’s outputs change as shown in Fig.4-2, the core of the auto sweep motor is excited
to turn the rotor. Table 4-1 shows the rotation angle of horizontal air deflectors.
Table 4-1 Auto sweep Motor Rotation
Rotation angle per step (˚ )
Time per step (ms.)
0.0882
10
Horizontal air deflectors
Microcomputer pins
Step width
Horizontal air
deflectors: 10ms.
Horizontal air deflectors
15
16
17
18
1
2
3
4
5
6
7
8
Fig.4-2 Microcomputer Output Signals
10
11
8
9
12
0V
7
6
5
4
18
17
16
Microcomputer
IC711
C711
12V
Rotor
Auto sweep motor for
horizontal air defectors
15
13
Fig.4-1
Summary of Contents for RAC-65NH5
Page 36: ...CIRCUIT DIAGRAM 37 ...
Page 37: ...CIRCUIT DIAGRAM MODEL RAC 65NH5 39 ...
Page 87: ... 99 SELF DIAGNOSIS LIGHTING MODE ...
Page 89: ... 101 2 Outdoor unit does not operate but receives remote infrared signal ...
Page 91: ... 103 6 Check the main P W B power circuit ...
Page 92: ... 104 CHECKING THE REMOTE CONTROLLER ...
Page 97: ... 109 ...
Page 107: ...HITACHI PM NO 0000E Printed in Malaysia RAK 65NH5 RAC 65NH5 ...
