LG LRSC21934SW, Service Manual

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Note1) Freezer room notch temperature display and refrigerator room notch temperature display(Failure code indication
part) are normally indicated in abnormal ambient sensor, and “Er” indicated on the amvient temperature
display(except for the ambient temperature display, other LCDs are indicated normally)
Note2) R2-sensor, Ice-maker sensor miracle zone sensor and Ice-maker kit is not indicated on the failure indicating part but
indicated in checking LCD(When pressing for more than the button of freezing temperature and super freezer button
for more than 1 second).
R2-sensor(middle room)
Normal: LCD graphic on the (C) part turns on
Abnormal: LCD graphic on the (C) part turns off
Ice-making sensor
Normal: LCD graphic on the (D) part turns on
Abnormal: LCD graphic on the (D) part turns off
Ice-maker unit
Normal: LCD graphic on the (E) part turns on
Abnormal : LCD graphic on the (E) part turns off
Miracle zone sensor
Normal: LCD graphic on the (F) part turns on
Abnormal : LCD graphic on the (F) part turns off
2-17. Test Function
1. The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure
status.
2. Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2
hours irrespective of test mode and then is reset to the normal status.
3. Function adjustment button is not perceived during performance of test mode.
4. In finishing test mode, always pull the power cord out and then plug-in it again for the normal state.
5. If nonconforming contents such as sensor failure are found during performance of test mode, release the test mode and
display the failure code.
6. Even if pressing the test button during failure code display, test mode will not be performed.
MICOM FUNCTION
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The other LCD Graphics Turn On.
Test 1
Test 2
Normal
Status
Mode Operation Contents Remarks
Press test button once
(strong cold mode)
Press test button once at
the test mode 1 status
(forced defrost mode)
Press test button once at
the test mode 2 status
1. Continuous operation of compressor
2. Continuous operation of freezing bldc motor
(high-speed RPM) and cooling bldc motor
3. Defrost heater turns off
4. Stepping motor damper is completely
opened (open of baffle)
5. Miracle zone stepping motor damper is
completely closed.
6. All display LCD graphics turns on.
1. Compressor OFF
2. Freezing bldc motor and cooling bldc motor
turn off
3. Defrost heater turns on
4. Stepping motor damper is completely
closed (closing of baffle)
5. Miracle zone stepping motor damper is
completely closed.
6. All display LCD graphics turns off (only LCD
turns on for(A) “MIDIUM” status, (B)
“MIDIUM” status)
Return to the initial status.
Freezing fan turns off in
door opening
Return to the normal mode
when the defrost sensor is
above +5°C
Compressor will operate
after delay for 7 minutes