LG LSC27931SW User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
PUSHPUSH
MODELS:
LSC27931SW
LSC27931SB
LSC27931ST

CONTENTS
WARNINGS AND SAFETY PRECAUTIONS ..........................................................................
1. SPECIFICATIONS ...............................................................................................................
2. PARTS IDENTIFICATION ...................................................................................................
3. HOW TO INSTALL REFRIGERATOR .................................................................................
4. HOW TO DISASSEMBLE AND ASSEMBLE......................................................................
5. MICOM FUNCTION .............................................................................................................
6. EXPLANATION FOR MICOM CIRCUIT ..............................................................................
7. ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR............................
8. CIRCUIT ..............................................................................................................................
9. TROUBLE DIAGNOSIS ......................................................................................................
10. EXPLODED VIEW .............................................................................................................
3
4
5
6
9
12
20
36
39
40
78
- 2 -

Please observe the following safety precautions to use the
refrigerator safely and correctly and to prevent accident or
injury when servicing.
1. Be careful of an electric shock. Disconnect power cord
from wall outlet and wait for more than three minutes
before replacing PWB parts. Shut off the power
whenever replacing and repairing electric components.
2. When connecting power cord, please wait for more than
five minutes after power cord was disconnected from the
wall outlet.
3. Please check if the power plug is pressed by the
refrigerator against the wall. If the power plug was
damaged, it could cause fire or electric shock.
4. If the wall outlet is overloaded, it may cause a fire.
Please use a dedicated circuit for the refrigerator.
5. Please make sure the outlet is properly grounded.
Particularly in a wet or damp area.
6. Use standard electrical components.
7. Make sure hooks are correctly engaged.
Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, run over, kink, bend, pull out, or
twist the power cord.
9. Please check for evidence of moisture intrusion in the
electrical components. Replace the parts or mask with
insulation tape if moisture intrusion was confirmed.
10. Do not touch the icemaker with hands or tools to
confirm the operation of geared motor.
11. Do not suggest that customers repair their refrigerator
themselves. This work requires special tools and
knowledge. Non-professionals could cause fire, injury,
or damage to the product.
12. Do not store flammable materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put anything on top of the refrigerator,
especially something containing water, like a vase.
14. Do not put glass bottles with full of water into the
freezer. The contents will freeze and break the glass
bottles.
15. When you scrap or discard the refrigerator, remove the
doors and dispose of it where children are not likely to
play in or around it.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

1. SPECIFICATIONS
- 4 -
724 mm (281/2
912 mm (35 in.)
779 mm (305/8 in.)
830 mm (325/8 in.)
891 mm (355/16 in.)
1261 mm (495/8 in.)
1741.5 mm (681/2 in.)
1746.5 mm (683/4 in.)
1771 mm (6911/16 in.) 1771 mm (6911/16 in.)
Front View Top View
LSC27931SW
LSC27931ST
LSC27931SB
MODELS
LSC27931SW
LSC27931ST
LSC27931SB
Super White Stainless Black
PCM Stainless VCM
MODELS
SPECIFICATIONS
Capacity
Refrigerant
Net Weight
Dimensions
Water Tank Heater
Insulation
Compressor
Temperature Control
Heater Defrost
Cyclo, Pentane
MOLECULAR SIEVE XH-7
MICOM control
EGX90HLC COMBO Starting Type
Wire Condenser
Cooling System
328.5 lbs
27 cuft
R134a
Fan Cooling
115 V~ / 60HzRated Rating
Temperate (N)Climate class
Defrost Cycle
Defrosting Device
Evaporator
ID Ø0.85
4 Hours
Capillary Tube
ESTER / ISO10 280ml
Defrosting System
First Defrost
Condenser
Lubricanting Oil
13 - 70 Hours
Fin Tube Type
Lamp
Shelf
Tray meat
Egg Bank
Basket, Quantity
Full Automatic
REFRIGERATOR
Embo (normal)
Vista
ICE PLUS
3 full + 1half
Yes (4) 40W/Blue
1 (Fix) + 2 (S/Out)
AUTO ICE MAKER+ SPACE PLUS
2 Wire + 1 plastic
Yes (1) 40W/Blue
5 EA (Wire)
Yes
No
SPECIFICATIONS
Case Material
Door Material
GENERAL FEATURES
Color
FREEZER
Anti-freezing Heater
Drier
Heater, Sheath
Lamp
Shelf
Handle Type
Display Graphic
Basket, Quantity
Ice Tray & Bank
36 x 33 x 70 in
29
/32
908 mm (35 in.)
11/16

2. PARTS IDENTIFICATION
PWB Cover
PUSHPUSH
- 5 -
Use this page to become more familiar with the parts and features. Page references are included for your
convenience.
Note: This guide covers several different models.The refrigerator you have purchased may have some or
all of the items listed below. The locations of the features shown below may not match your model.
Refrigerator Door Rack
Dairy Corner
J
L
M
KRefrigerator Shelf
Freezer Door Rack
Freezer Shelf
Drawer
B
C
D
A
E
Vegetable Drawer
F
G
I
Automatic Ice Maker
For storage of dairy products
such as butter and cheese.
Freezer Lamp
Base Grille
Snack Pan
For storage of meat or fresh food.
Water Filter
H
Refrigerator Lamp
A
B
C
B
D
D
E
F
N
G
H
I
J
N
M
K
I
N
L
Bottle Guide **
** On some models
The ice is produced in the icemaker
and sent to the dispenser.
P
Wine holder **
P

3. HOW TO INSTALL REFRIGERATOR
- 6 -
1. DOOR ALIGNMENT
Before adjust the doors, remove the Base Grille.
If the freezer compartment door is lower than
the refrigerator compartment door, make them
level by inserting flat blade screwdriver into the
groove of the left leveling leg and rotating it
clockwise.
Left leveling
leg Height
If the freezer compartment door is higher than the
refrigerator compartment door, make them level by
inserting flat blade screwdriver into the groove of
the right leveling leg and rotating it clockwise.
Left leveling leg
Height
difference
Adjust the level when the refrigerator door is lower than
the freezer door during the installation of the refrigerator.
Tools you need
• Wrench 5/16 in (8 mm)
• Wrench 3/4 in (19 mm)
AFTER LEVELING THE DOOR HEIGHT
Make sure the front leveling legs are completely
touching the floor.
difference
Height
difference
Height
difference
Height
difference
Height
difference
Using a ¾” (19 mm) wrench, turn the keeper nut clockwise
to lossen the keeper nut.
Keeper nut
Adjustment
hinge pin
Wrench
Up
Down
Using a 5/16” (8 mm) wrench, turn the adjustment hinge pin
clockwise or counterclockwise to level the refrigerator and
After setting the level door, turn the keeper nut
counterclockwise to tighten.
Do not over tightening the door adjustment screw. The
hinge pin can be pulled out. (Adjustable range of height is a
maximum of ½” (1.27 cm)).
freezer door.

- 7 -
2. WATER FILTER
It is recommended that you replace the filter when the
water filter indicator light turns on or your water
dispenser or ice maker decreases noticeably.
After changing the water filter cartridge, reset the water
filter status display and indicator light by pressing and
holding the BUTTON for 3 seconds.
1) Remove the old cartridge.
Rotate the knob of the cartridge counter clockwise.
When the cartridge is removed, you will feel it click
out of place. Pull of the cartridge.
NOTE: Replacing filter causes small amount of water
(around 25cc) to flow out. Please put up a cup under the
hole to prevent it.
2) Replace with a new cartridge.
Take the new cartridge out of it’s packaging and
remove protective cover from the o-rings. With
cartridge knob in the vertical position, push the new
filter cartridge into the cover until it stops.
If you can turn the filter from side to side, it isn’t fully
inserted. Push it in firmly and twist it into place. You
will hear the snap when it clicks into place. Using it’s
handle, twist the cartridge clockwise about 1/4 turn.
You will hear the snap when it clicks into place.
3) Flushing the water system after replacing filter.
To clean the system dispense 2.5 gallons (9.46 L) of
water through filter before use (dispense for
approximately 5 minutes).

3-1. Confirm the amount of water supplied to the icemaker.
1) Confirm the amount of water supplied to the icemaker
(1) Press the button (Figure 1) to selsct the level of water (Optimum level →Large → Small.)
2) Icemaker Operation Test (Test mode)
(1) Press the button (Figure 1) for more than 3 seconds and It will start the Test mode.
(2) Test the operation of the operating part of the icemaker.
(3) If there is no problem with the operation, water is supplied through the water tube (up to the
selected lebel of water).
(4) The test mode is completed after the water is supplied.
Note : When using the test mode more than twice consecutively, water can overflow.
When the water overflows, wipe the ice storage bin.
* It is acceptable if the adjusted level of water is a bit smaller than optimum level.
Water Amount
Indicator Light
Power
Switch
Water Amount
Selection Button
Feeler
Arm
Check water level
Figure 1.
- 8 -
3. HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO ICEMAKER

4. HOW TO DISASSEMBLE AND ASSEMBLE
1. REMOVING AND REPLACING
REFRIGERATOR DOORS
Before remove the doors, remove the Base Grille.
To remove the right (refrigerator) door:
CAUTION: When lifting the hinge free of the latch,
be careful that the door does not fall forward.
(1)
(2)
(3
)(4)
(5)
1. Open the door. Remove the top hinge cover screw
3. Rotate the hinge lever (3) clockwise. Lift the top hinge
2. Use a flat blade screwdriver to pry back the hooks
(not shown) on the cabinet underside of the cover (2).
Lift up the cover.
4. Lift the door from the lower hinge pin.
5. Place the door, inside facing up, on a nonscratching
surface.
(1).
Type 2
Type 1
(4) free of the hinge lever latch (5).
(3
)
(4) (5)
Rivet
NOTE: Regardless the type of hinge lever (3);
type1: without rivet or type 2: with rivet the
removal process is the same.
Removing the left (freezer) door with water line
connection.
• Pull up the water feed tube while pressing area
(Figure 1) as shown in the figure below.
If a tube end is deformed or abraded, trim the
part away. Disconnecting the tube under the door
causes about 0.5 liters water to flow out. Put a large
container at end of tube to prevent water from draining
onto the floor.
• NOTE:
Figure 1
1. Open the door. Remove the top hinge cover screw (1).
2. Use a flat blade screwdriver to pry back the hooks
(not shown) on the cabinet underside of the cover (2).
Lift up the cover.
3. Disconnect all the wire harnesses (3).
4. Remove the grounding screw (4).
5. Rotate hinge lever (5) counterclockwise. Lift the top
CAUTION: When lifting the hinge free of the latch,
be careful that the door does not fall forward.
7. Place the door, inside facing up, on a nonscratching
surface.
6. Lift the door from the lower hinge pin being careful to
pull the water lines through the lower hinge pin.
hinge (6) free of the hinge lever latch (7).
(1)
(2)
(3)
(5)
(6)
(7)
(4)
Type 2
Type 1
(6)
(5)
Rivet
NOTE: Regardless the type of hinge lever (5);
type1: without rivet or type 2: with rivet the
removal process is the same.
(7)
- 9 -

Reinstalling the rigth (Refrigerator) door
(1)
(2)
(3) (4)
(5)
Type 2
Type 1
(3
)
(4) (5)
Rivet
2. Fit top hinge (4) over hinge lever latch (5) into
place. Rotate lever (3) counterclockwise to secure
3. Hook tab on switch side of corner under edge of wire
opening in cabinet top. Position cover (2) into place.
Insert and tighten cover screw (1).
hinge.
1. Place the door onto the lower hinge pin.
NOTE: Regardless the type of hinge lever (3);
type1: without rivet or type 2: with rivet the
removal process is the same.
Reinstalling the left (Freezer) door
(1)
(2)
(3)
(5)
(6)
(7)
(4)
Type 2
Type 1
(5)
(6)
(7)
Rivet
2. Fit top hinge (6) over hinge lever latch (7) and into
place. Rotate lever (5) clockwise to secure hinge
3. Install the grounding screw (4) and connect all the
wire harnesses (3).
4. Hook tab on door switch side of cover (2) under edge
of wire opening in cabinet top. Position cover into
place. Insert and tighten cover screw (1).
1. Feed the water tubes through the lower hinge pin and
place the door onto the lower hinge pin.
5. Reconnect the water tubes by inserting the tubes into
the connectors.
NOTE: Regardless the type of hinge lever (5);
type1: without rivet or type 2: with rivet the
removal process is the same.
2. HANDLE REMOVAL
- 10 -
•
NOTE: If
Loosen the set screws with a 3/32” (2.38 mm) Allen
wrench and remove the handle.
the handle mounting fasteners need to be
tightened or moved, use a 1/4” (6.35 mm) Allen wrench.
Mounting
fasteners
Set screw
Allen Wrench

4. DISPENSER
1)Disconnect funnel and button assembly by pulling down
and forward.
2) Pull out the Drain
3) Grasp the lower part of the dispenser
firmly, pull it out.
12
4) Hold the inner side of Cover Dispenser with both
hands at the handle side to pull it out forward.
1. Loose one screw with a screwdriver blade.
2. Disassembly of an upper grille fan: Hold upper part of an
upper grille fan (U) and pull forward carefully.
3. Disassembly of a lower grille fan: Hold upper part of a
lower grille fan and pull forward carefully.
4. Disassembly of an upper freezer shroud: Hold lower part,
oull forward and disconnect housing A and B.
5. Check foam sticking conditions around a shroud, upper
freezer and lower freezer during assembling. If damaged
torn, or badly stuck, assemble with a new one afer sealing
well.
3. FAN SHROUD GRILLE
- 11 -

1. Monitor Panel
5. MICOM FUNCTION
Ice option dispenser selection
button
Temperature adjustment
button for refrigerator
compartment
Lamp On/Off button / Filter
status display RESET button
Temperature adjustment
button for freezer
compartment
Ice Plus function selection
button
Alarm button and Lock
button
- 12 -

1-1. Display Function
1-2. Display OFF Mode
1-4. Demonstration Mode (OFF Mode)
It places display in standby mode until door is opened.
Press “Freezer” and ICE PLUS buttons simultaneously to turn all leds become ON and then OFF with the recognition sound
of “Ding~” after 5 seconds. (Be sure not to press only one button to work.)
Once the mode activates, the display is always OFF. Until door is opened or display button is pressed. When 30 seconds
has elapsed after closing door or pressing button, the display turns OFF. To desactivate this mode is same as the activation
methods. The mode inactivates when resetting the power.
1) Any Door must be opened to enter in this mode.
2) To activate this mode press and hold ICE PLUS and REFRIGERATOR button over 5 seconds.
3) The display will show the word “OFF”
4) In this mode all loads are turn off(Compressor, Heater, Fans, etc)
5) Lamps and Dispenser Functions works normally (even in demonstration mode the refrigerator Lamp automatic off
function works normally)
6) To exit Demonstration mode open any Door then press and hold ICE PLUS and REFRIGERATOR button over 5
seconds (Display return to normal mode).
1) When the appliance is plugged in, it is set to 37°F for refrigerator and 0°F for freezer. You can adjust the Refrigerator
and the Freezer control temperature by pressing the ADJUST button.
2) When the power initially applied or restored after a power failure, it is set to Control temperature previously.
Toggle between °C / °F
Display OFF Mode
Demonstration Mode
1-3. How to Toggle the Display between °F & °C
The initial setting is °F and the display temperature mode can be changed from °F to °C or °C to °F by pressing and
holding the FREEZER and the REFRIGERATOR keys at the same time for over 5 seconds.
- 13 -

1-5. Lock function (dispenser and display button lock)
1-6. Filter condition display function
Ex) “LOCK”
Function ON
Ex) “LOCK”
Function OFF
1) When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock unlocked icon.
2) To lock the display, the dispenser, and the control panel, press, and hold the ALARM/LOCK button for 3 seconds. The
locked pad lock icon is displayed.
3) The ALARM/LOCK button is the only control feature that remains active in the locked state. The buzzer sound, other
control buttons, and the dispenser are desactivated.
4) To release from the locked state, press and hold the ALARM/LOCK button again for 3 seconds.
1) There is a replacement indicator for the filter cartridge on the dispenser.
2) Water filter needs replacement once six months or of using water filter.
3) Water filter icon turn on to tell you need to replace the filter soon.
4) After replacing the filter, press and hold the FILTER RESET button more than 3 seconds. HOLD 3 SECS icon turn off
with reset status.
- 14 -
1-7. ICE PLUS selection
1-8. Dispenser Light
Dispenser light ON/ OFF
LED
Please select this function for quick freezing.
> Function is repeat ICE PLUS icon whenever pressing ICE PLUS button
> ICE PLUS function automatically turns off after a fixed time passes.
Please select this function for DISPENSER LIGHT MODE.
1) Normal status (LIGHT icon is OFF): When dispenser is operated, DISPENSER LIGHT is ON.
2) ON status (LIGHT icon is ON): DISPENSER LIGHT is on continuously.
In initial Power On
/ Filter RESET
Replace indicator
light on

1-9. ICE PLUS
1) The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.
2) Whenever selection switch is pressed, selection/ release, the icon will turn ON or OFF.
3) If there es a power outage and the refrigerator is powered on again, ICE PLUS will be canceled.
4) To activate this function, press the Ice Plus key and the icon will turn ON. This function will remain activated for 24 hrs.
The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled at the lowest
temperature. After 24 hours or if the Ice Plus key is pressed again, the freezer will return to its previous temperature.
5) During the first 3 hours:
(1) Compressor and freezer fan (HIGH RPM) run continuously.
(2) If a defrost cycle begins during the first 90 minutes of Ice Plus, the Ice Plus cycle will complete its cycle after defrosting
has ended. If the defrost cycle begins when Ice Plus has run for more than 90 minutes, Ice Plus will run for two hours after the
defrost is completed.
(3) If Ice Plus is pressed during defrost, Ice Plus icon is on but this function will start seven minutes after defrost is completed
and it shall operate for three hours
(4) If Ice Plus is selected within seven minutes after compressor has stopped, the compressor (compressor delays seven
minutes) shall start after the balance of the delay time
(5) The fan motor in the freezer compartment runs at high speed during Ice Plus.
6) For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.
- 15 -
1-10. Control of variable type of freezing fan
1) To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed
of RPM and standard RPM.
2)
MICOM only operates in the input of initial power or ICE PLUS operation or load response operation for the high
speed of RPM and operates in the standard RPM in other general operation.
3) If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing
room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard
RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops.
4) As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining
that the BLDC fan motor is locked or poor if there would be position signal for more than 115 seconds at the BLDC motor.
Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, the BLDC motor doesn’t
operate more. If you want to operate the BLDC motor, turn off and on power resource.
1-11. Control of cooling fan motor
1) The cooling fan motor performs ON/OFF control by linking with the COMP.
2) It controls at the single RPM without varying RPM.
3) Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure
display).
1-12. Door opening alarm
1) Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with
doors of freezing / cold storage room or home bar opened.
2) Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and
then repeats three times of On/Off alarm in the cycle of every 30 seconds.
3) If all the doors of freezing / cold storage room or refrigerator room are closed during door open alarm, alarm is immediately
released.
Doors of freezing /
cold storage room
or refrigerator room
BUZZER
Closing
Opening
Within
a minute
A minute
30
seconds
30
seconds
30
seconds
Closing Opening Closing
3 Times 3 Times 3 Times 3 Times

1-13. Ringing of compulsory operation, compulsory frost removal buzzer
1) If pressing the test button in the main PCB, “Phi ~” sound rings.
2) In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for
1.8 second three times.
3) In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second , Off for
0.2 second, On for 0.2 second and Off for 1.4 second three times.
1-14. Defrost Function
1-15. Refrigerator room lamp automatically off
1) Refrigerator room lamp turn on and off by refrigerator door switch.
2) If refrigerator room lamp continuously turns on more than 7 minutes, the refrigerator room lamp turns off automatically by
compulsion.
1) Defrost is cycled whenever the compressor’s runtime reaches at least 7 - 7 ½ hours.
2) In providing initial power (or returning power failure), defrost starts whenever total operation time of compressor becomes 4-
6 hours.
3) Defrost is completed if temperature of a drost removal sensor becomes more than 5°C after starting frost removal. Poor frost
removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal.
4) No defrost cycle is run if the defrost fails.
- 16 -

1-16. Sequential operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
Function Load Operation Sequence Remark
INITIAL POWER ON
TEST MODE
Def sensor
Above 45°C
If error occurs
during operation,
initial operation is
not done.
•
If pressing sw
once more in the
test mode 2 or
temperature of
defrost sensor is
more than 5°c
it returns to the
test mode for
initial operation
(comp operates
after 7 minutes).
Def sensor
TEST MODE 1
TEST MODE 2
POWER
ON COMP
ON
F-FAN
&
C-FAN
ON
STEPPING
MOTOR
ON
DEF HTR
OFF
DEF HTR
ON
DISP
HTR ON
DISP
HTR OFF
0.3
sec.
0.3 0.3
sec. sec.
10
sec.
5
sec.
POWER
ON
5
sec. PIPE
ON
0.3
sec. COMP
ON
0.3
sec. F-FAN
&
C-FAN
ON
0.3
sec. STEPPING
MOTOR
ON
DUCT
HTR ON
TEST SW
(PRESS
Once)
OTHER
LOADS
OFF
COMP
ON
F-FAN
&
C-FAN
ON
STEPPING
MOTOR
OPEN
TEST SW
(PRESS
2 Times)
COMP
OFF
F-FAN
&
C-FAN
OFF
DEF
HEATER
ON
STEPPING
MOTOR
CLOSE
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
lower than
45°C (in
service)
PIPE HTR
ON
DUCT
HEATER
ON
0.3
sec.
: In case of the defrost sensor
Temperature: +5°C↓
It is a load
movement
sequence in
case of the F/R
room closed
- 17 -

The following figures illustrate the errors described in the above table the figures 3, 9 and 10, only are visible on LED check function.
- 18 -
1
NOTE 1:
Press FREEZER and ICE PLUS buttons at the same time for more than 1 second to activate the LED check function.
R2 Sensor Error: ICE PLUS LED turns OFF (Fig. 3).
Ambient Sensor Error; LOCK LED turns OFF (Fig. 9).
Water-Tank Sensor Error: Display show “Er rt” (Fig. 10).
FULL OPENING FOR 10MIN/
FULL CLOSING FOR 15MIN.
Error1 Error2 Error3 Error4 Error5 Error6 Error7 Error8 Error9 Error10

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. 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.
- 19 -
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, this will remain opened 5 second after release dispenser pad
5) While using dispenser Ice or Water function and the door is opened the operation will be stoped.
6)If the water or ice Pad exceeds 3 minutes this will turn OFF automatically but the duct door will remain opened 5
seconds after this interruption.
7) While pressing a water pad the water will be dispensed and then water pad is released the water dispensing will stop.
MODE OPERATION CONTENTS REMARKS
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) Only
F/R Notch normal LED
NORMAL STATUS
Press test switch
button once at the test
mode 2 status
Return to the initial status (Comp is operated after 7 minutes)
TEST 1 Press test button once
(freezing force mode)
Under the TEST 1, if the
test circuit is shorted
continuosly, stay to keep
the Test 1
TEST 2
Press test button once
at the test mode 1
(compulsory frost
removal mode)
Defrosting Sensor= -5°C
Defrosting Heater ON
Defrosting Sensor= +5°C:
Return to the original
status (COMP is operated
after 7 minutes).

1. Explanation for PWB circuit
1-1. Power circuit
The power circuit includes a Switched Mode Power Supply (SMPS). It consists of a rectifier (BD1 and CE1) converting AC
to DC, a switch (IC2) switching the DC voltage, a transformer, and a feedback circuit (IC3 and IC4).
Caution : Since high voltage (160 Vdc) is maintained at the power terminal, wait at least 3 minutes after unplugging the
appliance to check the voltages to allow the current to dissipate.
Voltage of every part is as follows:
6. EXPLANATION FOR MICOM CIRCUIT
Part VA1 CE1 CE2 CE3 CE4 CE5
Voltage 120 Vac 160 Vdc 14 Vdc 12 Vdc 15.5 Vdc 5 Vdc
The part highlighted in green, are the
components of the Switched Mode
Power Supply
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