LG LRSC26980TT, LRSC26944SW, LRSC26944TT, LRSC26980SB, LRSC26930TT User Manual

...

CAUTION

PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

REFRIGERATOR

SERVICE MANUAL

LRSC26944SW, LRSC26944TT LRSC26930SW, LRSC26930TT LRSC26922SW, LRSC26922TT LRSC26920SW, LRSC26920TT

LRSC26911SW, LRSC26911TT LRSC26910SW, LRSC26910TT

LRSC26980SB, LRSC26980TT

http://biz.lgservice.com

CONTENTS

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3

SPECIFICATIONS................................................................................................................................................................... 4

PARTS IDENTIFICATION ....................................................................................................................................................... 9

HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 14

HOW TO ADJUST DOOR HEIGHT.................................................................................................................................... 14

FILTER ............................................................................................................................................................................... 15

HOW TO CONTROL THE ICEMAKER WATER SUPPLY.................................................................................................. 16

MICOM FUNCTION .............................................................................................................................................................. 18

EXPLANATION OF MICOM CIRCUIT.................................................................................................................................. 32

EXPLANATION OF PWB CIRCUIT .....................................................................................................................................32

PWB PARTS DIAGRAM AND LIST .....................................................................................................................................47

PWB CIRCUIT DIAGRAM ...................................................................................................................................................54

OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER ................................................................................... 56

OPERATION PRINCIPLE ................................................................................................................................................... 56

CONTROL METHOD ACCORDING TO FUNCTIONS....................................................................................................... 57

DEFECT DIAGNOSIS FUNCTION..................................................................................................................................... 59

CIRCUIT................................................................................................................................................................................ 60

TROUBLE DIAGNOSIS........................................................................................................................................................ 63

TROUBLESHOOTING ....................................................................................................................................................... 63

FAULTS .............................................................................................................................................................................. 73

COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 90

HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 97

HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................... 103

DOOR............................................................................................................................................................................... 103

HANDLE ........................................................................................................................................................................... 104

FAN SHROUD GRILLE .................................................................................................................................................... 105

ICEMAKER ASSEMBLY................................................................................................................................................... 105

DISPENSER..................................................................................................................................................................... 106

TV-RADIO ............................................................................................................................................................................107

EXPLODED VIEW............................................................................................................................................................... 113

REPLACEMENT PARTS LIST ........................................................................................................................................... 131

- 2 -

WARNINGS AND PRECAUTIONS FOR SAFETY

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. Disconnect the power whenever replacing and repairing electric components.

2. If disconnecting the power, wait at least 5 minutes before plugging the unit back in.

3. Before touching the power cord, make sure the cord is not damaged. If the power cord is damaged, it can cause a fire or an electrical shock.

4. Make sure the unit has a dedicated circuit breaker. Overloading the circuit can cause a fire.

5. Please make sure the outlet is properly grounded. Particularly in a wet or damp area.

6. Use standard electrical components.

7. 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 is confirmed.

10. Stay clear of the icemaker with hands or tools if the unit has power. Do not try to manually turn the ice maker even when turned off.

11. Customers should not repair the 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, or gas 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 of water into the freezer. The contents will freeze and break the bottles.

15. If you scrap or discard the refrigerator, remove the doors and dispose of it where children are not likely to play in or around it.

- 3 -

SPECIFICATIONS

Ref No. : LRSC26944**

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

D X H (35

/16

in.)

NET WEIGHT 149 kg (328.5 lbs.)

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @10G (320 cc)

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

CAPILLARY TUBE ID Ø0.83

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater

FREEZER LAMP 40W (2 EA)

REFRIGERATOR LAMP 40W (4 EA)

DISPENSER LAMP 15W (1 EA)

in.)

1771 mm (69

1004 mm (391/2 in.)

908 mm (35

in.)

1741.5 mm (68

Front View Top View

in.)

1771 mm (69

1746.5 mm (68

/4 in.)

in.)

724 mm (28

779 mm (30

829 mm (32

in.)

897 mm (35

1261 mm (49

- 4 -

SPECIFICATIONS

724 mm (28

in.)

1004 mm (391/2 in.)

908 mm (35

/4 in.)

779 mm (30

in.)

829 mm (32

in.)

897 mm (35

in.)

1261 mm (49

in.)

1741.5 mm (68

in.)

1746.5 mm (68

in.)

1771 mm (69

in.)

1771 mm (69

in.)

Ref No. : LRSC26930**

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

X D X

H (35

NET WEIGHT 149 kg (328.5 lbs.)

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

INSULATION Cyclo-Pentane

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (185g) (6

LUBRICATING OIL FREOL @10G (320 cc)

/16X355/16X6911/16 in.)

Heater Defrost

/2 oz.)

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

CAPILLARY TUBE ID Ø0.83

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (4 EA)

DISPENSER LAMP 15W (1 EA)

Front View Top View

- 5 -

SPECIFICATIONS

Ref No. : LRSC26920**, LRSC26922**

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

X D X

H (35

NET WEIGHT 149 kg (328.5 lbs.)

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

INSULATION Cyclo-Pentane

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (185g) (6

LUBRICATING OIL FREOL @10G (320 cc)

/16X355/16X6911/16 in.)

Heater Defrost

/2 oz.)

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

CAPILLARY TUBE ID Ø0.83

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (4 EA)

DISPENSER LAMP 15W (1 EA)

in.)

1771 mm (69

1004 mm (391/2 in.)

908 mm (35

in.)

1741.5 mm (68

Front View Top View

in.)

1771 mm (69

1746.5 mm (68

/4 in.)

in.)

724 mm (28

779 mm (30

829 mm (32

in.)

897 mm (35

1261 mm (49

- 6 -

SPECIFICATIONS

Ref No. : LRSC26910**, LRSC26911**

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

D X H (35

/16

in.)

NET WEIGHT 149 kg (328.5 lbs.)

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @10G (320 cc)

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

CAPILLARY TUBE ID Ø0.83

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater

FREEZER LAMP 40W (1 EA)

REFRIGERATOR LAMP 40W (3 EA)

DISPENSER LAMP 15W (1 EA)

in.)

1771 mm (69

1004 mm (391/2 in.)

908 mm (35

in.)

1741.5 mm (68

Front View Top View

in.)

1771 mm (69

1746.5 mm (68

/4 in.)

in.)

724 mm (28

779 mm (30

829 mm (32

in.)

892 mm (35

1261 mm (49

- 7 -

SPECIFICATIONS

Ref No. : LRSC26980TT

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

D X H (35

/16

in.)

NET WEIGHT 154 kg (339.5 lbs.)

COOLING SYSTEM Fan Cooling

TEMPERATURE CONTROL Micom Control

DEFROSTING SYSTEM Full Automatic

Heater Defrost

INSULATION Cyclo-Pentane

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER Wire Condenser

REFRIGERANT R134a (185g) (6

/2 oz.)

LUBRICATING OIL FREOL @10G (320 cc)

ITEMS SPECIFICATIONS

DRIER MOLECULAR SIEVE XH-7

CAPILLARY TUBE ID Ø0.83

FIRST DEFROST 4 - 5 Hours

DEFROST CYCLE 13 - 15 Hours

DEFROSTING DEVICE Heater, Sheath

ANTI-SWEAT HEATER Dispenser Duct Door Heater

Dispenser Heater

ANTI-FREEZING HEATER Water Tank Heater

Damper Heater

FREEZER LAMP 40W (2 EA)

REFRIGERATOR LAMP 40W (4 EA)

DISPENSER LAMP 15W (1 EA)

in.)

1771 mm (69

1004 mm (391/2 in.)

908 mm (35

in.)

1741.5 mm (68

Front View Top View

in.)

1771 mm (69

1746.5 mm (68

/4 in.)

in.)

724 mm (28

779 mm (30

829 mm (32

in.)

897 mm (35

1261 mm (49

- 8 -

PARTS IDENTIFICATION

Humidity SwitchOptiChill Display

Lamp

Shelf

Egg Box

Snack Drawer

Vegetable Drawer

OptiChill

Door Rack

Shelf

Grab and Go

Can Server

Lamp

Lower Cover

Dairy Products Corner

Water Filter

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Door Rack

Bottle Guide

Display Panel

Dispenser Lamp

Ice & Water

Dispenser Button

PCB Cover

Water Tubes

Ref No. : LRSC26944**

- 9 -

PARTS IDENTIFICATION

Humidity Switch

Lamp

Shelf

Egg Box

Snack Drawer

Vegetable Drawer

OptiChill

Door Rack

Shelf

Grab and Go

Wine Holder

Lamp

Lower Cover

Dairy Products Corner

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Bottle Guide

Display Panel

Dispenser Lamp

Ice & Water

Dispenser Button

OptiChill Display

Door Rack

Water Filter

PCB Cover

Water Tubes

Ref No. : LRSC26930**

- 10 -

PARTS IDENTIFICATION

Humidity Switch

Lamp

Shelf

Egg Box

Snack Drawer

Vegetable Drawer

Vegetable Drawer /Meat Drawer

Door Rack

Shelf

Door Rack

Wine Holder

Lamp

Lower Cover

Dairy Products Corner

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Bottle Guide

Display Panel

Dispenser Lamp

Ice & Water

Dispenser Button

PCB Cover

Water Tubes

Door Rack

Water Filter

Ref No. : LRSC26920**, LRSC26922**

- 11 -

PARTS IDENTIFICATION

Lamp

Shelf

Egg Box

Snack Drawer

Vegetable Drawer

Vegetable Drawer /Meat Drawer

Door Rack

Shelf

Door Rack

Wine Holder

Lamp

Lower Cover

Dairy Products Corner

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

PCB Cover

Water Tubes

Door Rack

Water Filter

Humidity Switch

Bottle Guide

Display Panel

Dispenser Lamp

Ice & Water

Dispenser Button

Ref No. : LRSC26910**, LRSC26911**

- 12 -

PARTS IDENTIFICATION

Humidity SwitchOptiChill Display

Lamp

Shelf

Egg Box

Snack Drawer

Vegetable Drawer

OptiChill

Door Rack

Shelf

Grab and Go

Can Server

Lamp

Lower Cover

Dairy Products Corner

Water Filter

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Door Rack

Bottle Guide

Display Panel

Dispenser Lamp

Ice & Water

Dispenser Button

PCB Cover

Water Tubes

Ref No. : LRSC26980TT

- 13 -

HOW TO INSTALL REFRIGERATOR

Adjusting Screw

Driver

Height

Difference

Height Difference

How to Adjust Door Height of Refrigerator

■ Level the refrigerator first. (If the refrigerator is not installed on a flat floor, the height of freezer and refrigerator doors may not be the same.)

If the freezer door is lower than the refrigerator door: If the freezer door is higher than the refrigerator door:

Insert a driver  into the groove  of the adjusting screw and turn in the direction of the arrow (clockwise) until the refrigerator is level.

- 14 -

Insert a driver  into the groove  of the adjusting screw and turn in the direction of the arrow (clockwise) until the refrigerator is level.

HOW TO INSTALL REFRIGERATOR

Filter

Replace the filter when the indicator light comes on or the performance of the icemaker or water dispenser 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.(page 18)

1. Remove the old cartridge.

Twist the knob of the cartridge counter clockwise.

2. Replace with a new cartridge.

Take the new cartridge out of its packaging and remove the protective cover from the o-rings.

With the cartridge knob in the vertical position, push the new filter cartridge into the cover until it stops.

If you can’t 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 the handle, twist the cartridge clockwise about 1/4 turn.

When the cartridge is removed, you will feel it click .

Pull out the cartridge.

NOTE: There will be some water(25cc) in the filter

cartridge. Some spilling may occur. Catch it in a bowl or towel.

3. After replacing filter, dispense water through the water

dispenser for 3 minutes to purge the system. There may be a little air in the line, causing noise or hissing. Run the water at the dispenser until the hissing stops.

NOTE: - To purchase replacement water filter cartridges,

visit your local appliance dealer or part distributor, or call 1-877-714-7486.

- You can also visit our website : www.lgappliances.com

- 15 -

HOW TO INSTALL REFRIGERATOR

Ice Maker

1) How to Control the Amount of Water Supplied to Icemaker.

Caution : • Do not put hands or tools into the chute to confirm the operation of geared motor.

It may damage the refrigerator or hurt your hands.

To gain access to the ice maker, remove the ice bin in the upper part of the freezer compartment. Then use the water control switch to change the amount of water supplied to the ice maker.

Water supply amount TABLE

STAGE TIME TO SUPPLY INDICATIONS REMARKS

4 sec.

4.5 sec.

5 sec.

5.5 sec.

6 sec.

The water amount will vary depending

on the Water Control Switch setting as

well as the water pressure of the

connected water line.

- 16 -

HOW TO INSTALL REFRIGERATOR

WARNING

Personal Injury Hazard

Avoid contact with the moving parts of the ejector mechanism or with the heating element that releases the cubes. DO NOT place fingers or hands on the automatic icemaking mechanism while the refrigerator is plugged in.

2) Operating instructions

A newly-installed refrigerator may take up to 24 hours to begin making ice.

Icemaker

Feeler Arm

Cube Size Indicator Light

The icemaker will produce eight cubes per cycle—approximately 120–150 cubes in a 24-hour period, depending on freezer compartment temperature, room temperature, number of door openings and other operating conditions.

If the refrigerator is used before the water connection is made to the icemaker, set the power switch to O (off).

When the refrigerator has been connected to the water supply, set the power switch to I (on).

The icemaker will fill with water when it cools to freezing. A newly-installed refrigerator may take up to 24 hours to begin making ice cubes.

Throw away the first few batches of ice to allow the water line to clear.

Be sure nothing interferes with the sweep of the feeler arm.

When the bin fills to the level of the feeler arm, the icemaker will stop producing ice.

It is normal for several cubes to be stuck together.

If ice is not used frequently, old ice cubes will become cloudy, taste stale, and shrink.

Water Supply Control Switch

Power Switch

NOTE: If the cube size is smaller or larger than you expected, you can regulate the size with the cube size button. (normally caused by variations in water pressure.)

Every time you press the cube size button, the indicator light goes up. The higher the position indicated, the larger the cubes will be. (1st step is the next after the 5th step.)

3) When you should set the icemaker power switch to O (off)

• When the water supply will be shut off for several hours.

• When the ice storage bin is removed for more than a

minute or two.

• When the refrigerator will not be used for several days.

4) Normal sounds you may hear

• The icemaker water valve will buzz as the icemaker fills

with water. If the power switch is in the I (on) position, it will buzz even if it has not yet been hooked up to water. To stop the buzzing, move the power switch to O (off).

NOTE: Keeping the power switch in the I (on) position before the water line is connected can damage the icemaker.

• You will hear the sound of cubes dropping into the bin

and water running in the pipes as the icemaker refills.

5) Preparing for Vacation

Set the icemaker power switch to O (off) and shut off the water supply to the refrigerator.

If the ambient temperature will drop below freezing, have a qualified servicer drain the water supply system (on some models) to prevent serious property damage due to flooding from ruptured water lines or connections.

- 17 -

MICOM FUNCTION

ICEBEAM COOLING

OFF

CUBE

FILTER MONTH

EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOOK

ROOM TEMP

DISPENSER & KEY

WATER

5 4 3 2 1

CRUSH

F F

3 SECS

Dispenser selection button

Express Freezer/Jet Freezer function selection button

Dispenser and Button

Lock button

Filter Timer Reset & Dispenser

Light Toggle

Refrigerator Compartment

Temperature Setting

Freezer Compartment Temperature Setting

EXPRESS

DIGITAL CONTROL

FRZ TEMP REF TEMP

JET

CUBE

FILTER RESET HOLD 3SECS

EXPRESS/JET FRZ DISPENSER FREEZER

REFRIGERATOR

FILTER RESET/LIGHT

LOOK

ROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH

3 SECS

FILTER

DIGITAL CONTROL

FRZ TEMP REF TEMP

OFF

CUBE

FILTER RESET HOLD 3SECS

EXPRESS FRZ DISPENSER FREEZER

REFRIGERATOR

FILTER RESET/LIGHT

LOOK

ROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH

3 SECS

FILTER

1. Monitor Panel

1-1. LRSC26944**, LRSC26980TT

1-2. LRSC26930**

1-3. LRSC26910**, LRSC26911**, LRSC26920**, LRSC26922**

- 18 -

MICOM FUNCTION

2. Refrigerator Functions

2-1-1. Temperature Selection (LRSC26944**, LRSC26980TT)

Division Power Initially On 1st Press 2st Press 3th Press 4th Press

Setting temperature

Temperature Control

Freezer Control

Refrigeration Control

* The temperature can vary ±3 °C depending on the load condition.

5 4 3 2 1

Medium Medium Cold Coldest Warmest Medium Warm

-2 °F -5 °F -8 °F 7 °F 4 °F

37 °F 34 °F 32 °F 46 °F 41 °F

5 4 3 2 1

❉ Whenever pressing the button, setting is repeated in the order of (Medium) ➝ (Medium Cold) ➝ (Coldest) ➝ (Warmest) ➝

(Medium Warm).

• The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target temperature, not the actual temperature within the refrigerator.

• A newly installed refrigerator will take 24 hours minimum for temperatures to stabilize. The temperature should be checked and adjusted as necessary after 2 or 3 days.

2-1-2. LCD Back Light Control (LRSC26944**, LRSC26980TT)

1. In order to see the LCD display more easily, the backlight is turned on for one minute at the initial application of power, for 20 seconds when buttons are pressed, when a door is opened, and for 20 seconds after the door is closed.

2. When any display button is pressed while the backlight is off, the bell sounds and the backlight is turned on, but the button function is not performed. In other words, pressing any button turns on the backlight but does not cause any function to be initiated.

3. To check the LCD graphic and back light ON/OFF status, press and hold the EXPRESS/JET FRZ and FREEZER buttons. This will turn the back light on and illuminate all of the graphics. When the buttons are released, the graphic display returns to its previous setting and the back light is turned off.

2-1-3. Room temperature display function

1. The sensor for the ROOM TEMP display is located under the upper right hinge cover. Factors such as air flow, lighting, and other appliances operating within the room, may cause the display to differ from other temperature displays in the same room.

2. Ambient temperature is displayed between 16°F and 120°F. Temperatures 15°F and below are displayed as Lo and temperatures 121°F and above are displayed as Hi. If the ambient temperature sensor fails, Er will be displayed.

- 19 -

MICOM FUNCTION

DISPENSER & KEY

3 SECS

LOCK

DISPENSER & KEY

3 SECS

LOCK CONTROL

DISPENSER & KEY

3 SECS

LOCK

DISPENSER & KEY

3 SECS

LOCK CONTROL

Ex) Select

LOCK

Ex) Select

LOCK again

Ex) Select

LOCK

Ex) Select

LOCK again

In initial

Power On

Classification

Filter Status

Display

Pass of a month

Pass of

2 months

Pass of

3 months

Pass of

4 months

Pass of

5 months

Pass of

6 months

3 SECS

FILTER MONTH

FILTER

MONTH

FILTER MONTH

FILTER

MONTH

FILTER MONTH

FILTER

MONTH

FILTER

MONTH

FILTER LIGHT

In initial Power On

/ Filter RESET

Replace indicator

light on

Classification

Filter Status

Display

FILTER

FILTER RESET HOLD 3SECS

FILTER

3 SECS

FILTER LIGHT

2-1-4. Lock function (dispenser and display button lock)

1. When the refrigerator is first powered up, the Lock function is turned off.

2. To lock the display, the dispenser, and the control panel, press and hold the LOCK button for more than 3 seconds. The LOCK text on the display will be turned on.

3. To unlock the controls, press and hold the lock button for more than 3 seconds. The LOCK text on the display will be turned off.

LCD (LRSC26944**, LRSC26980TT) LED (All models except LRSC26944**, LRSC26980TT)

2-1-5. Filter condition display function

LCD (LRSC26944**, LRSC26980TT)

1. This units displays the months left before the water filter needs to be changed. It starts when the unit is first plugged in.

2. After 6 months have passed the filter change will appear on the display. It will show FILTER LIGHT 3 SECS.

3. Press and hold the filter button for 3 seconds to reset the filter timer.

LED (All models except LRSC26944**, LRSC26980TT)

1. There is a replacement indicator light for the water filter cartridge on the dispenser.

2. The water filter should be replaced every six months or about 28,000 seconds' filtering time.

3. The water filter light and FILTER RESET HOLD 3 SECS will show in the display to remind you to change the filter soon.

4. After replacing the filter, press and hold the lock button for more than 3 seconds. The FILTER RESET HOLD 3 SECS will turn off.

- 20 -

MICOM FUNCTION

DISPENSER

LCD LED

CUBE

WATER

CRUSH

CUBE

WATER

CRUSH

Pressing

Switch

LCD (LRSC26944**, LRSC26980TT)

LED (LRSC26930**)

LED (LRSC26910**, LRSC26911**, LRSC26920**, LRSC26922**)

EXPRESS/JET FRZ

OFF

EXPRESS FRZ

JET FRZ

EXPRESS/JET FRZ

EXPRESS

JET

EXPRESS FRZ

OFF

Dispenser Iight OFF

LCD

Dispenser Iight ON

LCD

Dispenser Iight ON/OFF

LED

2-2. Dispenser use selection

You can select water or ice. ❉ Select water, crushed ice, or ice cubes by cycling through the selections when

pressing the DISPENSER button.

❉ Hold your cup in the dispenser for a few seconds after dispensing ice or water to

allow the last pieces of ice or drops of water to fall into the cup.

2-3. Express freezing/JET freezing selection

Please select this function for prompt freezing.

• The functions are cycled in the order shown below when the EXPRESS/JET FRZ button is pressed.

• The arrow mark graphic remains at the On status after flickering 4 times when selecting Special Refrigeration EXPRESS

FRZ or JET FRZ.

• EXPRESS FREEZE and JET FREEZE operate for a set time and then default to normal freezer operation.

2-4. Dispenser Light

• Dispenser switch or dispenser light button turns the dispenser light in the dispenser on and off.

• The dispenser light turns off automatically after 7 minutes.

- 21 -

MICOM FUNCTION

2-5. Express freezing

1. EXPRESS FREEZING improves the cooling speed of the freezer by running the compressor and the freezer fan.

2. In the event of power failure, EXPRESS FREEZING is cancelled and the freezer defaults to normal operation.

3. The temperature setting is not changed when EXPRESS FREEZING is selected.

4. The freezer compartment and refrigerator temperature settings can be changed even when EXPRESS FREEZING is selected and the cycle is underway.

5. The refrigerator compartment will operate at its usual setting even when EXPRESS FREEZING is selected or in progress.

6. If you select EXPRESS FREEZING, the refrigerator will default to its original setting at the end of the cycle.

7. If the defrost cycle is scheduled to come on while EXPRESS FREEZING is selected, EXPRESS FREEZING will operate only for the time that is not used by the defrost setting.

8. If you press EXPRESS FREEZING during the defrost cycle, the EXPRESS FREEZING indicator will turn on but the cycle will not run until the defrost cycle is completed.

9. If you press EXPRESS FREEZING within 7 minutes of the compressor’s last run cycle, the EXPRESS FREEZING cycle will not begin until the 7 minute delay is complete.

10. The freezer fan runs at high speed when Express Freezing is selected.

2-6. Jet Freezing

1. Jet Freezing improves the cooling speed of the Jet Freezing Compartment by running the compressor and the Jet Freezing Compartment fan.

2. If there is a power failure, the Jet Freezing cycle is released and the freezer defaults to its original setting.

3. If Jet Freezing is selected, the compressor (after the compressor delay time has passed) and the freezer fan will be turned on. The temperature in the freezer will drop and the fan motor will be turned off for a set time, but the Jet Freezing fan will run for no more than two hours. After that, the Jet Freezing function is terminated and the freezer defaults to its original setting.

4. To keep the fan motor from freezing, it is switched on for 10 seconds once an hour.

5. The fan motor of jet freezing box will not be detected as a failure. (dc 12v operation)

6. When checking the Jet Freezing function, the Jet Freezing Compartment fan motor is switched on for 1 minute if the freezer adjustment button or the Express Freeze button is pressed for more than one second.

- 22 -

MICOM FUNCTION

°F / SET TEMP

/ TIME REMAINING

MIN

WINE

3.0

1.5

0.5

EXPRESS

CHILL

THAW(lbs)

FRUIT VEGE

CHILED

ROOM

PARTIAL

FREEZING

SELECT SELECT

2-7. OptiChill Function

LRSC26944**, LRSC26980TT

2-7-1. OptiChill Temperature Control

1. The Optichill is positioned at the bottom of the refrigerator compartment. It allows the user to select a more specific temperature based on the foods being stored, such as meat, fish, fruits and vegetables, etc.

2. The Optichill system consists of a sensor at the rear of the drawer, a damper, a fan motor between the Optichill compartment and the freezer, a heater at the bottom of the Optichill compartment, and a temperature adjustment display at the top.

3. The initial setting of the Optichill will be FRUIT VEGE.

4. Each time you press the SELECT button, the selection cycles through the settings in the order of FRUIT VEGE (39°F)→CHILLED ROOM (30°F)→PARTIAL FREEZING (27°F)→WINE(50°F)→FRUIT VEGE (39°F). The display will show the target temperature. If EXPRESS CHILL or THAW is selected, the selected temperature and NOTCH LED are not shown, and the temperature can be adjusted.

5. The Optichill sensor detects the temperature and relays this information to the MICOM. Based on the temperature and setting, The damper is opened or closed and the heater is on or off, as the conditions warrant.

6. If the Optichill damper hasn’t moved within an hour, it is automatically opened or closed and then returned to its previous setting to keep it from freezing in one position.

7. In Display Check mode, the Optichill fan motor is turned on for one minute. To enter the Display Check mode, press and hold both the Freezer Adjust button and the Express Freezing button for three seconds.

8. If the Optichill fan motor hasn’t run within an hour, it is automatically run for ten seconds once every hour to keep it from freezing in one position.

NOTCH

Partial

Freezing

Display 27°F30°F39°F50°F

Chilled

Room

Fruit

VEGE

Wine

- 23 -

3.0lbs 1.5lbs

12Hr 8Hr 4Hr 90Min 50°F

THAW

0.5lbs

Express

Chill

Function

MICOM FUNCTION

2-7-2. OptiChill Thawing & Express Chill Control

1. When you press the SELECT button on the right, the THAW LED will light. The time for the selected function will be shown. You can cycle through the options in this order: EXPRESS CHILL/THAW OFF→EXPRESS CHILL (90 Min.)→ THAW 0.5 lbs. (4 hours)→THAW 1.5 lbs. (8 hours)→THAW 3.5 lbs. (12 hours)→EXPRESS CHILL/THAW OFF. If EXPRESS CHILL/THAW is selected, the NOTCH temperature in the Optichill will not be displayed.

2. If EXPRESS Chill is selected, the Optichill damper is opened and the fan motor is turned on. If the Optichill does not reach the set temperature after no more than ninety minutes, the setting is released.

3. The Optichill will count down from 90 minutes and show the remaining time in minutes.

4. When the EXPRESS CHILL cycle ends (or is released), the setting defaults to FRUIT VEGE (39°F).

5. If THAW is selected, the Optichill damper is closed and the time and temperature will be set according to the thawing function selected. The thawing function will be automatically terminated at the end of the set time.

6. When in THAW mode, the sensor controls the heater to keep the set temperature.

7. When in THAW mode, the display counts down the remaining time in minutes.

8. When the THAW mode is released, the Optichill automatically defaults to CHILLED ROOM (30°F).

LRSC26930**

2-7-3. OptiChill Temperature Control

1. The Optichill is in the bottom of the refrigerator compartment and allows the user to select and adjust the temperature based on the type food stored there. Selections include meat, fish, fruits and vegetables, etc. Storing foods at the proper temperature allows them to be stored for longer periods.

2. The Optichill consists of a temperature sensor, a damper between the Optichill and the freezer, and a temperature control/display at the top.

3. At initial power-up, the Optichill defaults to FRUIT VEGE. If the refrigerator door is opened, the Optichill LED will be on.

4. When you press the SELECT button on the left, the LED will light and indicate the setting. The time for the selected function will be shown. You can cycle through the options in this order: FRUIT VEGE (39°F)→CHILLED ROOM→PARTIAL FREEZING→FRUIT VEGE. The display will indicate the temperature for the selected setting.

5. The Optichill sensor detects the temperature and relays that information to the MICOM. When the set temperature is reached, the Optichill damper is closed. If the temperature rises, the damper is opened to allow the temperature to fall again.

6. If the Optichill damper hasn’t moved within an hour, it is automatically moved and returned to its original setting once every hour to keep it from freezing in one position.

- 24 -

MICOM FUNCTION

Doors of freezing / cold storage room

or home bar

BUZZER

Closing

Opening

Within

a minute

A minute

seconds30seconds30seconds

Opening

Closing Closing

3 Times 3 Times 3 Times 3 Times

2-8. Variable freezing fan

1. To increase the cooling speed and load response speed, the MICOM will switches the freezer compartment fan motor between high and regular speeds.

2. The MICOM runs the freezer fan at high speed only at initial power-up, Express Freezing operation, or in response to a high load. The fan runs at the regular speed in all other circumstances.

3. When you open the refrigerator door while the fan is running at high speed, the MICOM will switch the fan to regular speed. If you open the freezer door or the home bar door, the fan is switched off.

4. If the MICOM determines the fan is obstructed (the blade cannot turn) it switches the fan off. When there is no fan rotation signal for 115 seconds, the MICOM displays an error on the display. To restart the fan, clear the obstruction and turn the power off and back on.

2-9. Cooling fan motor

1. The cooling fan is switched ON and OFF in conjunction with the compressor.

2. The cooling fan runs at a single speed.

3. The Failure sensing method is the same as in the fan motor of the freezing fan motor (refer to failure diagnosis function table for failure display).

2-10. Door alarm

1. If the doors are left open for more than one minute, the buzzer sounds three 1/2-second tones at thirty second intervals for four times.

2. If all the doors of freezing/cold storage room or home bar are closed during door open alarm, alarm is immediately turns off.

2-11. Button selection buzzer bell

1. The DING sounds if you press any button on the front display.

- 25 -

MICOM FUNCTION

2-12. Automatic Defrost Signal

1. The beep will sound if you press the test button on the main PCB.

2. The regular cycle sounds three short beeps one second apart.

3. When you select the automatic defrost cycle, the alarm sounds three series of three short beeps one minute apart.

2-13. Defrost Function

1. Automatic defrost is performed whenever the compressor run time totals 71/2 hours.

2. At initial power-up, the defrost cycle will run when the total compressor runtime is 4

3. Defrost is completed when the defrost sensor temperature rises above 41°F (5°C) during the defrost cycle. The defrost cycle will terminate if the defrost sensor temperature does not achieve 41°F (5°C) within two hours.

4. The defrost cycle will not operate if the defrost sensor fails.

2-14. Refrigerator compartment lamp automatically off

1. The refrigerator light is turned ON and OFF by the refrigerator door switch.

2. If the refrigerator light is on for more than 7 minutes, it will be turned off automatically. It will operate normally if you close the door and re-open it.

hours.

- 26 -

MICOM FUNCTION

POWER

COMP

F-FAN

C-FAN

R-STEP

MOTOR

DAMPER

OPTICHILL

STEP

DAMPER

MOTOR

DEFROST

HEATER

OFF

DEFROST

HEATER

DAMPER

DUCT DOOR

OPTICHILL

HEATER ON

DAMPER

DUCT DOOR

OPTICHILL

HEATER OFF

0.3

sec.

6.0

sec.

0.3

sec.

0.3

sec.

0.3

sec.

POWER

0.3

sec.

PIPE

DISP'

HEATER

OFF

0.3

sec.

COMP

0.3

sec.

F-FAN

C-FAN

0.3

sec.

R-STEP MOTOR

DAMPER

0.3

sec.

OPTICHILL

STEP

DAMPER

MOTOR

PIPE

DISP'

HEATER

TEST

SWITCH

(PRESS

Once)

OTHER

LOAD

OFF

COMP

F-FAN

C-FAN

R-STEP MOTOR

DAMPER

OPTICHILL

STEP

DAMPER

MOTOR

TEST

SWITCH

(PRESS

2 Times)

COMP

OFF

F-FAN

C-FAN

OFF

FROST

REMOVAL

HEATER

R-STEP MOTOR

DAMPER

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.

0.3

sec.

0.3

sec.

2-15. Sequential operation of components

Electromechanical parts of the appliance, such as the compressor, defrost heater, freezer fan, cooling fan, and damper motor, are operated sequentially as shown in the chart below to prevent noise and circuit overload from everything starting at once.

Function Load Operation Sequence Remark

When temperature of a defrost sensor becomes more than 45°C (initial setup, movement)

In applying Initial power TEST MODE

When temperature of a defrost sensor becomes less than 45°C (power failure, service)

Test mode 1 (Compulsory function)

Test mode 2 (Compulsory defrost)

If error occurs during operation, initial operation is not done.

Sequence of load operation when closing freezer and refrigerator.

The refrigerator will return to normal operation if you press the test switch once again while in Test Mode 2 or if the temperature of the defrost sensor surpasses 41°F (5°C). The compressor will run after the 7minute delay.

- 27 -

MICOM FUNCTION

ICEBEAM COOLING

OFF

CUBE

FILTER MONTH

ROOM TEMP

DISPENSER & KEY

WATER 5

4 3 2 1

CRUSH

F F

3 SECS

EXPRESS

(On)

DIGITAL CONTROL

FRZ TEMP REF TEMP

(Off) JET

CUBE

FILTER RESET HOLD 3SECS

ROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH

3 SECS

FILTER

A B D C

FAILURE CODE

INDICATION PART

A B D

FAILURE CODE

INDICATION PART

2-16. Failure Diagnosis

1. The failure diagnosis function indicates the area of a failure while the product is in operation.

2. When the appliance enters the failure mode, pressing buttons has no effect on the operation of the appliance.

3. If the error clears itself, the MICOM will reset and the appliance will operate as usual.

4. The failure code will be displayed as indicated in the drawings below. All other graphics and displays will be turned off.

LRSC26944**, LRSC26980TT All models except LRSC26944**, LRSC26980TT

●●

Failure code indication part

No. Item

Abnormal freezer sensor

Abnormal refrigerator

Freezer notch

temperature

Refrigerator notch

temperature

display

Er FS

Er rS

display

Contents of failure

Freezer sensor short circuit

Refrigerator sensor1 short circuit

Compressor

ON for 15minutes / OFF for 15minutes

sensor 1 (R1) (Upper part in the refrigerator compartment)

Abnormal refrigerator sensor 2 (R2)

Normal display

(Note 2)

Refrigerator sensor2 short circuit

(Middle part in the refrigerator compartment)

Abnormal defrost

Er dS

Abnormal short circuit

sensor

Failed defrosting

Er dH

Defrost heater, temperature fuse short circuit, unplugged connector(indicated 4 hour later after trouble)

Abnormal freezing

BLDC motor

Er FF

Motor defect, hooked of lead wire to fan, contact of structures with fan, short or open of lead

Abnormal cooling

BLDC motor

Er CF

wire(there is no signal of BLDC motor more than 115 seconds in operation of fan motor)

Communication

Errors.

Er CO

Short or open of lead wire connecting between main PCB and display PCB, transmission tr and receiving part

Abnormal

ambient sensor

Abnormal

Optichill sensor

✽ All displays turn off other than freezer room notch temperature display and refrigerator room notch temperature

display(failure code indication part) when indicating failure modes(except for Note1, Note2).

Normal display

(Note 1)

Normal display

(Note 2)

Ambient sensor short circuit

Optichill sensor short circuit

Product operation status in failure

Freezing

BLDC motor

Standard

Cooling

BLDC motor

●●

RPM

Standard

●●

RPM

Standard

●●

RPM

Standard

●●

RPM

Standard

●●

RPM

●●

OFF

Standard

●●

OFF

RPM

Standard

●●

RPM

●●

Defrost

Heater

●●

No defrost

●●

: Proper operation

Stepping

motor damper

●●

Full opening for

10 minutes/

Full closing for

15 minutes

●●

- 28 -

MICOM FUNCTION

Note1) The freezer and refrigerator temperature displays are also used to display error codes. The exception is that when

the ambient temperature sensor fails, it shows Er in the ambient temperature display. All other display elements will function normally.

Note2) The R2 sensor, Optichill sensor, and water tank sensor are not indicated in the error codes, but you can see these

errors by entering the test mode by pressing and holding the Freezer Temperature and Express/Jet Freezer buttons simultaneously.

R2-sensor (middle room)

Optichill sensor

Water tank sensor

✻ LCD (LED) check function: LCD (LED) Press and hold the Express Freeze button and the Freezer Temperature

adjustment button to check the display. This will turn on the backlight and all display elements. Release the buttons and the display will return to its usual state.

Normal: LED or LCD graphic on the (C) part turns on Abnormal: LED or LCD graphic on the (C) part turns off

Normal: LED or LCD graphic on the (D) part turns on Abnormal: LED or LCD graphic on the (D) part turns off

Normal: LEDs or LCDs graphic on the (E) part turns on Abnormal: LEDs or LCDs graphic on the (E) part turns off

The other LED or LCD Graphics Turn On.

- 29 -

MICOM FUNCTION

EXPRESS

DIGITAL CONTROL

FRZ TEMP REF TEMP

JET

CUBE

FILTER RESET

HOLD 3SECS

ROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH

3 SECS

FILTER

5 4 3 2 1

ICEBEAM COOLING

CUBE

FILTER MONTH

ROOM TEMP

DISPENSER & KEY

WATER 5

4 3 2 1

CRUSH

3 SECS

EXPRESS FRZ

LOCK

JET

3 SECS

FILTER LIGHT

2-17. Test Function

1. The test function is a self-diagnostic system designed to detect problems early and to make diagnosis and repair easier and quicker.

2. The test button is on the main PCB. Test mode can run for up to 2 hours and will then default to the normal operation mode if not reset manually.

3. The function buttons are inoperable when the refrigerator is in test mode.

4. When you have finished using the test mode, reset the appliance manually by unplugging it for several seconds.

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. The test button is inoperable if the display is showing failure codes. Reset the appliance manually to use the test button.

Mode Operation Contents Remarks

Test 1

Test 2

Normal

Status

Press test button once (strong cold mode)

Press test button once at the test mode 1 status (forced defrost mode)

Press test button once at the test mode 2 status

1. Continuous operation of compressor

2. Continuous operation of freezing BLDC motor (high-speed RPM) and cooling BLDC motor

3. Defrost heater turns off

4. Stepping motor damper is completely opened (baffle open)

5. Optichill stepping motor damper is completely closed.

6. All display LEDs or LCD graphics turn on.

1. Compressor OFF

2. Freezing BLDC motor and cooling BLDC motor turn off

3. Defrost heater turns on

4. Stepping motor damper is completely closed (baffle close)

5. Optichill stepping motor damper is completely closed.

6. All display LEDs or LCD graphics turn off. Except for (A), (B) LCD graphic. Except for (A): 22 (B): 22 LEDs.

Return to the initial status.

TEST MODE1 STATUS DISPLAY

Freezer fan is off when door is open.

Return to the normal mode when the defrost sensor is above +5°C

Compressor will operate after delay for 7 minutes

TEST MODE2 STATUS DISPLAY

- 30 -

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