LG GR-B197GVQ Service Manual page 24

2-4. Control of variable
type
of freezer
compartment
fan
1. To increase
cooling speed
and load response
speed,
the MICOM varies the freezer fan
speed.
2. The MICOM increases the fan
speed only at
initial power-up,
special freezing operation,
or
in response to load
sensors.
In other
cases.
the MICOM
runs
the fan
at
its standard
speed.
3. The freezer fan
runs
at
the normal
speed
when you open the
refrigerator
door
or
the home bar door. If it
was
running at
high speed,
it is reduced
to
the normal
speed.
If you open the freezer door. the freezer fan
stops.
4. The MICOM monitors the fan condition
at
all times. If the fan is restricted
(something
gets
into the blade
or
blocks the
airflow),
the MICOM
turns
the fan off and transmits
an error
code
to
the
display.
2-5. Control of M/C
room
fan
motor
1. The M/C
room
fan motor performs ON/OFF control by linking with the COMP.
2. It controls
at
the
single
RPM without
varying
RPM.
3. Failure
sensing
method is
same as
freezing
fan
motor (refer to
failure
diagnosis
function table for failure
display).
2-6. Door
opening
alarm
1. The alarm sounds if any door is left open for
more
than
a
minute.
2. Buzzer
rings
three times in the interval of half second after the first one-minute has
passed
after doors
are
opened
and
then
repeats
three times of On/Off alarm in the
cycle
of every 30 seconds.
3. If the doors of the freezer
or
home bar
are
closed.
2-7. Ringing of button selection buzzer
1. If you press the front
display button,
the
Ding
sounds.
2-8.
Ringing
of
compulsory operation, compulsory
frost removal buzzer
1. If you press the
test
button
on
the Main PCB, the Phi sounds.
2. In
selecting compulsory operation,
the alarm sounds
a
short
ding
3 times every
thirty
seconds.
3. In
setting compulsory frost removal, the alarm sounds 2 short dings 3 times every thirty seconds.
MICOM FUNCTION
-24-
BUZZER
Any Door
Closing Opening
Within
a
minute
A minute 30
seconds
30
seconds
30
seconds
Opening Closing Closing
3 Times 3 Times 3 Times 3 Times