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Samsung SR-S20DTC - Load Operation Circuit

Samsung SR-S20DTC
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8-7)
Load
Operation
Circuit
Part
oz
L
waldo
¢
RED
fax
OE:
EATER
£
GAN
BLK
GRY
RO,
—
aa
[ARSENE
|
er
—
ee
BLK
[ICE
WAKER
PIPE
HEATER)
<a
es
o)
:
[oseecnenta”H
DISPENSER
HEATER
S/W
BLK:
Ga
WRK
®
PRP
ICE
SOLENOD-VALYE
Faw
AUCER
MOTOR
aes
L
On®
‘CUBE
SOLENOID
When
“HIGH”
signal
is
applied
to
INPUT
terminal
of
ICO3(KID65003AP)
from
MICOM
PIN
NO
#16(P07),
IC
is
turned
on.
At
this
time,
V12(DC12V)
which
is
applied
to
the
one
terminal
of
coil
of
COMP
relay
flows
to
ground
through
output
of
ICO3.
Then
core
generates
magnetic
field
to
turn
on
the
connection
point,
and
it
applies
voltage
of
230V
to
COMP
foad
to
turn
on
COMP.
When
MICOM
PIN
NO
#16
changes
to
“LOW”
state,
electricity
cannot
flow
to
COMP
relay
coil
because
IC
is
turned
off.
So
relay
connection
point
becomes
to
OFF
state
and
stops
COMP.
@
COMP
&
F,R
Defrost
Heater
Inter-operation
Explanation
COMP
RELAY
Like
the
above
block
diagram,
operation
of
F,
R
defrost
heater
is
determined
according
to
the
operation
of
relay
for
COMP.
When
COMP
relay
is
connected
to
NO
terminal,
COMP
operates.
However,
in
case
of
F,
R
defrost
heater,
electricity
does
not
pass
through
the
heater
though
relay
works.
But,
if
COMP
relay
is
connected
to
MC
terminal,
COMP
does
not
operate
and
heater
gets
electricity
according
to
operation
of
F,
R
defrost
relay.
*
Purpose
of
application
of
above
circuit:
It
aims
to
interrupt
electricity
passage
through
F,
R
defrost
heater
even
though
F,
R
defrost
relay
is
bad
while
COMP
is
operating.

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