LG GR-K192UF Service Manual page 15

MICOM function and circuit description
5-1-11. Test function
1. The test function checks the functions of the PCB and the refrigerator, searching for errors in parts.
2. The test switch on the PCB operates the test mode. The refrigerator reverts to the normal mode after 2 hours if you forget
to end it manually.
3. When the test mode is active, the buttons on the control panel are disabled but the buzzer still sounds a ding if one is pressed.
4. When the test mode is completed, unplug the refrigerator briefly and plug it in again to reset it and allow normal
operation.
5. If a sensor failure or other failure is detected during the test mode, release the test mode to display the failure code.
6. During the display of the error code, test mode does not work even if you press the Test switch.
Mode Operation
TEST1
TEST S/W
Press once
TEST2
During TEST1
Press once
TEST3 During TEST2
Press once
TEST4 During TEST3
Press once
Recover
During TEST4
Press once
to initial
status
LED CHECK function
All LEDs are turned ON by pressing and holding "Kimchi store" button on the left chamber and "Kimchi store" button on the
right chamber together for one second or longer. When these buttons are released, the LED returns to the previous state.
Comp, Valve
Fan motor
ON
Left valve25
min/Right valve25
min
Right valve open
ON
ON
Left valve open
-
OFF
The compressor will operate after a delay of 7 min.
- 15 -
Display LED
L/R ferment
(At the L/R remaining
heater
fermentation time
display )
OFF
Error code
display "1", "1"
OFF Error code
display "2", "2"
OFF
Error code
display "3", "3"
ON
Error code
display "4", "4"
Remarks
Check the left &
right compartment
cooling system
Check right
compartment
cooling system
Check left
compartment
cooling system
Check heater
* After a max. of 30
minutes or when the
temperature of the
each compartment
is higher then
40°C,the storage will
recover to its initial
status