LG LSC27931SB Service Manual page 20

1-17. 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. T est 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.
MODE OPERATION
Press test button once
TEST 1
(freezing force mode)
Press test button once
at the test mode 1
TEST 2
(compulsory frost
removal mode)
Press test switch
NORMAL STATUS button once at the test
mode 2 status
1-18. Function of dispenser and water dispenser built-in
1)While the refrigerator Door is opened, Dispenser function can't be used.
2) There are 2 dispenser pads: first pad is for get water and second is for get ice.
3) In order to get ice after select ICE/CRUSH option then press the dispenser ICE pad.
4) When pressing Ice Pad, duct door is opened by Motor DC (Duct Door Motor), the duct door will remain opened 5s
after release dispenser pad.
5) When pressing WATER PAD the WATER solenoid is opened allowing water dispensing the water Pad switch is
connected to main PCB directly, main PCB get this signal as input to control pilot valve and water valve. When water
pad is released the pilot valve and water valve is closed and water dispensing will stop.
CONTENTS
1. COMP ON
2. Drive FAN high-speed RPM
3. Defrost and H/bar, TP Heater OFF
4. R-stepping motor damper
All the BAFFLE opened
5. All the Display ON
1. COMP OFF, Cooling FAN OFF
2. Defrost Heater ON
3. H/bar. TP HEATER OFF
4. R-stepping motor damper
All the BAFFLE closed
5. Only F/R room NOTCH ON ("22" "22")
BETTER 1 (Only F/R "normal" LED)
F/R Notch normal LED
Return to the initial status (Comp is operated after 7 minutes)
Ice Pad
- 19 -
REMARKS
Under the TEST 1, if the
test circuit is shorted
continuosly, stay to keep
the Test 1
Defrosting Sensor= -5°C
Defrosting Heater ON
Defrostin Sensor= +5°C:
Return to the original
status (COMP is operated
after 7 minutes).
Only
Water Pad