LG GR-B197DVCA Service Manual page 31

MICOM FUNCTION
Note1) The abnormality of RT-Sensor, R2-Sensor Icemaker Unit, and Icemaker-Sensor is not indicated in trouble code but it
is indicated when checking LED (when pressing both freezer temperature control button and refrigerator temperature
control button for more than 1 second at the same time).
RT-Sensor
R2-Sensor
Icemaker Unit
Icemaker Sensor
2-16. Test Function
1. The purpose of test function is to check function of the PCB 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 but only warning sounds ring.
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.
MODE HANDLING
Test 1 Press TEST s/w once.
Test 2 Press TEST s/w once at
TEST1 conditions.
Normal Press TEST s/w once at
Conditions TEST2 conditions.
Normal : A LED on,
Normal : B LED on,
Normal : C LED on,
Normal : D LED on,
1. Compressor continuously operates.
2. Freezer fan (high speed RPM), Cooling fan
continuously operates.
3. Defrost heater is off.
4. All display LEDs are on.
5. Stepping motor damper is in open
conditions. (baffle is open)
1. Compressor is off
2. Freezer fan, Cooling fan are off.
3. Defrost heater is on.
4. All display LEDs are off. (Freezer room "2"
LED and Refrigerator room "2" LED are
only ON.)
5. Stepping motor damper is in closed. (baffle
is closed).
Returns to the initial conditions.
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Abnormal : A LED Off.
Abnormal : B LED Off.
Abnormal : C LED Off.
Abnormal : D LED Off.
CONTENTS
The rest of LEDs
are all on.
REMARKS
- Forced operate.
- Freezer fan is off when
door is opened.
- It returns to normal
conditions when the
temperature of defrost
sensor is above 5°C.
- Forced defrost.
Compressor starts after
seven minutes delay.