LG LTCS20020 Series Service Manual page 30

8-1-12 TEST MODE
1. The test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of
an error.
2. The test button is on the main PCB of the refrigerator (Test S/W). The test mode will be cleared in 5 minutes on test
mode 1 and in 2 hours on test mode 2 and then reset.
3. While in the test mode, the function control button is not recognized though the recognition tone (beep~) sounds.
4. After exiting the test mode, be sure reset by unplugging and then plugging in the appliance.
5. If an error, such as a sensor failure, is detected while in the test mode, the test mode is cleared and the error code is
displayed.
6. While an error is detected, the test mode will not be activated even if the test button is pushed.
e d o M
TEST 1 Push the test button
once.
TEST 2 Push the test button
once while in the TEST
MODE 1.
Reset Push the test button
once while in the TEST
MODE 2.
* LED Check Mode: When the ADJUST TEMP button is pushed and held together for 1 sec or longer, every LED on the
display turns on simultaneously or error code is shown if any error is detected. When the buttons are released, the previous
mode is restored.
<TEST MODE1 STATUS LED>
Demonstration MODE (OFF)
1. Press the temperature Adjust button until the OFF LED turns ON to activate this mode. (After selecting the Demonstration
Mode it takes 10 seconds to be enable).
2. In this status all loads are OFF (Compressor, Fans, Heaters), only LED lamp will be in normal function.
3. To exit of the Demonstration Mode press the Temperature Adjust button and set the desired temperature level. The device
will reset after 10 seconds and the display will blink one time.
Note: If door is opened within the first 5 minutes from power on the demonstration mode, it will be released and set at middle
level automatically.
n o i t a l u p i n
1. Continuous operation of the comp
2. Continuous operation of the freezer fan
3. Defrosting heater OFF
4. Every display LED ON
5. Room lighting LEDs can be switch on/off by
door open
1. Comp OFF
2. Freezer fan OFF
3. Defrosting heater ON
4. Temperature display part show as bellows.
Reset to the default setting
<TEST MODE2 STATUS LED>
30
a M s t n e t n o
Copyright © 2020 LG Electronics Inc.All right s reserved.
Only training and service purposes.
C k r a m
Reset if the temp of
the defrosting sensor
is 10°C or above.
The compressor will
start in 7 minute-delay.
The freezer fan will start
in 12 minute-delay.
e R