LG LRSC21934SW, Service Manual

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2-1-2. LCD Back Light Control
1. In order to easily view display status on the LCD, LCD Back Light is turned on for a minute in application of initial power,
for a minute in button manipulation and for a minute after closing time from opening time of door.
2. If pressing any display button once with the backlight turned off, buzzer rings and button function is not performed but
only backlight is turned on (If pressing the first button with the back light turned off, only back light ON function is
performed).
3. If pressing the special freezing button and the freezing temperature adjustment button for more than a second, the back
light is turned on and all the graphics of LCD are turned on. If releasing the button, the LCD graphic is displayed in the
previous status and the back light is turned off (check LCD graphic and back light ON/OFF status).
2-1-3. Outside temperature display function
1. Outside temperature sensor at the left U of refrigerator senses ambient temperature and displays the outside temperature
in the left side of “Outside temperature” text on the LCD of the display part.
2. Ambient temperature is displayed up to -9°C ~ 49°C and displayed as “Lo” for less than -10°C and as “HI” for more than
50°C. If the ambient temperature sensor fails, it is displayed as “Er”.
3. Since display temperature of outside temperature is temperature sensed by the ambient sensor in the hinge U of the
freezing room, it may differ from the outside temperature display of other household electrical appliances.
2-1-4. Lock function (display button lock)
1. In power application of refrigerator, the only “Release” text is turned on at the right side of lock graphic of LCD with the
lock release status.
2. If desiring to lock the display status and pressing the lock/release button once, “Release” text is turned off at the right side
of lock graphic of LCD and “Lock” text is turned on with lock status.
3. The buzzer sound and function is not performed even if pressing display button other than lock/release key in the lock
status.
4. If desiring to release the lock status and pressing the lock/release button once, “Lock” text is turned off at the right side of
lock graphic of LCD and “Release” text is turned on with lock release status.
2-1-5. Filter condition display function
1. As demonstrated below, it displays the months left in units of 30 days until the filter replacement is required, starting from
when the refrigerator power usage is authorized.
2. After 6 months, the following sentence and will appear on the filter condition part of the LCD. "Press for 3
seconds after replacing filter"
3. After 6 months have passed, and if the filter has been replaced or you want to reset the filter condition display, press the
filter replacement button for more than 3 seconds and it will reset to the initial Power On state.
MICOM FUNCTION
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FILTER RESET
PUSH 3 SEC.
FILTER STATUS
6
5
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2
1 6
5
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1 6
5
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2
1 6
5
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1 6
5
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1 6
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1 6
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1
In initial
Power On
Classification
Filter Status
Display
Pass of
a month
Pass of
2 months
Pass of
3 months
Pass of
4 months
Pass of
5 months
Pass of
6 months
FILTER STATUS FILTER STATUS FILTER STATUS FILTER STATUS FILTER STATUS FILTER STATUS
FILTER RESET
PUSH 3 SEC.