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EXPLATION FOR MICOM CIRCUIT
3. Door opening sensing circuit
<GR-L207ERA,
GR-L247ERA>
<GR-B207ERA,
GR-B247ERA>
,,
,"._r .....
7
h,,
I
L -- -
R63
"1.;
120
G0
I
I
R47
Ih .....
I
IK
_CONDtTIONS
Bell sounds when button on
Beep sounds when warning
OFF
M_qURING_-.._
dosplay
is pressed,
door opening.
POINTS
5V
IC1 (No. 48 Pin)
IC1 (No. 51 Pin)
,0053, 0.2s >,0.1s,. 04 s
5V
r_
-r --Z-
,
0 v ._i,
L
I
0 v
_.63 kz(DING)_ .21_ (BONG
0V
mD
0.5s
,
O,5s
,
r
_
r
_
€
5V
0V
<GR-L207ERA,
GR-L247ERA>
<GR-B207ERA,
GR-B247ERA>
Measuring part
Door of Freezing/Cold Storage Room
Closing
Opening
IC1 (MICOM) No. 47, 46 Pin
5 V (_) - _), (_) - _).
S/W at both ends are at Off status)
5 V (_) - _), (_)- (_.
S/W at both ends are at On status)
Since door switch sensing switch (A), (B) are a separate switch even if the door switch of the freezing room normally
operates, they may fail to sense door opening in the failure of switch at both ends of (A) and (B) or in failure of the L/wire.
Lamp does at the cold storage room not turn on if the door switch of the cold storage room fails to sense the door open
switch (c), (d) or the home bar switch.
- 36 -
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