– 60 –
11. Wired remote control receiver circuit
1
2
3
+
—
13
0V
0V
5V
R611
Wired input
Micro computer
C611
R770R771C550C551L550
CN18
L551
C771
GRN2
Wired remote control
C770
PC101
The signal from wired remote control is send to micro computer pin no 13 by using photo coupler (PC101).
L550, L551, C770 and C771 act as a filter to reduce the noise from the wired remote control.
12. Static-pressure switch
Fuse
Operate LED
Timer LED
Temporary sw2
High
LowNormal
Normal Test
Static pressure sw
Drain pump test drive sw
Micro computer
Buzzer
Static pressure switch
When set to High, the revolution per minute will increase 100 min
–1
and when set to Low, the revolution per
minute will decrease 200 min
–1
.
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