Function Of Icemaker - LG GR-B197GVQ Service Manual

2. Function of Icemaker
2-1. Initial Control Function
1. When power is
initially applied
or
reapplied
after power
cut,
it detects level of icemaker cube mould after
completion
of
MICOM initialization. The
detecting
lever
moves
up and down.
2.
The level of icemaker cube mould is
judged by
output
signal, high
and low
signal,
of Hall IC. Make the cube mould
to
be
horizontal
by rotating
ice
ejection motor
in normal
or reverse
direction
so
that
High/Low signal
can
be
applied to
MICOM
Pin No. 44.
3. If there is
no
change
in
signals
one
minute after the
geared motor starts to
operate,
it
stops
icemaker
operation
and check
the
signal
every hour. It
resets
initialization of icemaker when it becomes normal.
4.
It
judges
that the initial control is
completed
when it
judges
the icemaker cube mould is horizontal.
5. Ice ejection conducts for 1 cycle irrespect of ice in the ice bin when power is initially applied.
2-2. Water
Supply
Control Function
1. This is
to supply water
into the icemaker cube mould
by operating water
valve in the machine
room
when ice
ejection
control is
completed
and icemaker mould is
even.
2.
The
quantity
of
water supplied
is determined
by
DIP switch and time.
Water
Supply Quantity
Table
3. If
water supply quantity setting
is
changed
while power is
on, water supplies
for the amended time. If DIP switch is
changed during water supply, water
shall be
supplied
for the
previous setting
time. But it will
supply
for the amended time
from the
next supply.
4. When
water supply signal
is
applied to water
and ice valves
at
the
same
time
during water supply, water
shall be
supplied
to water
valve. If
water supply signal
is
applied to
ice valve
during water supply, water
shall be
supplied to
both
water
and
ice valves.
2-3.
Icemaking
Control Function
1.
Icemaking
control is carried
out
from the
completion
of
water supply to
the
completion
of
icemaking
in the cube mould.
Icemaking
sensor
detects the
temperature
of cube mould and
completes icemaking. (icemaking
sensor
is fixed below
icemaker cube
mould)
2.
Icemaking
control starts after
completion
of water
supply
control
or
initial control.
3. It is
judged
that
icemaking
is
completed
when
icemaking
sensor temperature
reaches
at
-8°C after 100 minutes when
water
is
supplied to
icemaker cube mould.
4. It is
judged
that
icemaking
is
completed
when icemaker
sensor
temperature
reaches below -12 °C after 20 minutes in
condition 3.
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD
-59-
DIP SWITCH SETTING
No
S/W 1 S/W 2 S/W 3
WATER SUPPLY TIME REMARKS
1 OFF OFF OFF 6.5 Sec.
2 ON OFF OFF 5.5 Sec.
3 OFF ON OFF 6 Sec.
4 ON ON OFF 7 Sec.
5
OFF OFF ON 7.5 Sec.
6
ON OFF ON 8 Sec.
7
OFF ON ON 9 Sec.
8
ON ON ON 10 Sec.
*
The quantity of water supplied
depends
on
DIP switch
setting
conditions and
water
pressure as
it is
a
direct
tap
water
connection
type.
(the water supplied
is
generally
80
cc
to 120 cc)
*
DIP switch is
on
the main PWB.