Icemaker Circuit Part - LG GR-B197GVQ Service Manual

4. Icemaker circuit
part
The above icemaker circuit is
applied to
the
GR-P(L)207ERA(EQA), GR-P(L)247ERA(EQA)
and consists of the icemaker
unit
part
installed at the freezing
room
and the icemaker driving
part
of the main PWB.
Water
supply to
the icemaker container is done
by opening
the valve for the established
water supply
time
by operating
the
container via
a
solenoid
relay
for the ice valve of the solenoid valve
placed at
the Compressor
area.
If the water
supply
time
is elapsed, water supply is automatically
stop.
This circuit is
a
circuit for implementing function such
as
ice removal, ice-full
detection,
horizontal
balancing
and
sense
of
icemaking
temperature
for the icemaker container. Since
icemaking
temperature sense
is
same as
in the
temperature sense
circuit
part
of the main
PWB,
refer
to
it.
Test switch input detection of the icemaker is
same as
in the door switch
input
detection circuit of the main PWB.
1. This function is used in
operation test,
service execution and
cleaning etc
and
performed
if
pressing
the
test
switch
installed at the automatic icemaker itself for
more
than 0.5 second.
2. The
test
switch
operates
in the horizontal status and test function is not
input
in the water
supply operation.
Ice removal
control and water supply control is not performed if full-ice is arrived during the operation of test function.
3. If
pressing
the
test
switch for 0.5 second
or more
in the horizontal
status,
ice removal
operation
is
immediately performed
irrespective
of the
generation
conditions of ice
at
the
icemaking
tray. Therefore,
care
is
required
since
water
may overflow
if operating test function in the water state that icemaking is not done. A cycle of water supply is performed in the
horizontal
balancing operation
after ice removal
operation. Therefore,
you can
check any
problem
of ice removal
operation,
horizontal
operation
and
water supply.
In this
case,
if test function is
normally performed, Ding~
buzzer sound
rings
and
water supply
control is
performed.
Thus,
no
ringing
of
Ding~
buzzer sound
means
failure and
repair
check
must
be
performed.
4. If water
supply
is
completed, operation
in the normal
cycle
of
icemaking
ice removal
returning to
horizontal
status
water supply.
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD
-63-
SWITCH
SWITCH