LG LRSC26925SW, LRSC26941xx, LRSC26925TT, LRSC26923SW, LRSC26923TT Service Manual

CAUTION

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

REFRIGERATOR

SERVICE MANUAL

LRSC26925SW
LRSC26925TT
LRSC26923SW
LRSC26923TT

LRSC26915SW
LRSC26915TT
LRSC26912SW
LRSC26912TT
LRSC26940SW
LRSC26940SB
LRSC26940TT
LRSC26940ST
LRSC26941SW
LRSC26941SB
LRSC26941ST

http://biz.lgservice.com

CONTENTS

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

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

PARTS IDENTIFICATION ....................................................................................................................................................... 7

HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 10

HOW TO ADJUST DOOR HEIGHT.................................................................................................................................... 10

FILTER ................................................................................................................................................................................ 11

HOW TO CONTROL THE ICEMAKER WATER SUPPLY.................................................................................................. 12

MICOM FUNCTION .............................................................................................................................................................. 14

EXPLANATION OF MICOM CIRCUIT.................................................................................................................................. 29

EXPLANATION OF PWB CIRCUIT .....................................................................................................................................29

PWB PARTS DIAGRAM AND LIST .....................................................................................................................................54

PWB CIRCUIT DIAGRAM ...................................................................................................................................................67

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR...........................................................................73

WORKING PRINCIPLES.................................................................................................................................................... 73

FUNCTION OF ICE MAKER .............................................................................................................................................. 74

ICE MAKER TROUBLESHOOTING................................................................................................................................... 77

ICE MAKER CIRCUIT .........................................................................................................................................................79

CIRCUIT................................................................................................................................................................................ 80

TROUBLE DIAGNOSIS........................................................................................................................................................ 83

TROUBLESHOOTING ....................................................................................................................................................... 83

FAULTS .............................................................................................................................................................................. 93

COOLING CYCLE HEAVY REPAIR ................................................................................................................................. 110

HOW TO DEAL WITH CLAIMS ........................................................................................................................................ 117

HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................... 122

DOOR............................................................................................................................................................................... 122

HANDLE ........................................................................................................................................................................... 123

FAN SHROUD GRILLE .................................................................................................................................................... 124

ICEMAKER ASSEMBLY................................................................................................................................................... 124

DISPENSER..................................................................................................................................................................... 125

EXPLODED VIEW .............................................................................................................................................................. 127

REPLACEMENT PARTS LIST ........................................................................................................................................... 143

- 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. 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.

- 3 -

SPECIFICATIONS

724 mm (28

1

/

2

in.)

1004 mm (391/2 in.)

908 mm (39

11

/16 in.)

779 mm (30

5

/

8

in.)

829 mm (32

5

/

8

in.)

897 mm (35

5

/

16

in.)

1261 mm (49

5

/

8

in.)

1741.5 mm (68

1

/

2

in.)

1746.5 mm (68

3

/

4

in.)

1771 mm (69

11

/

16

in.)

1771 mm (69

11

/

16

in.)

1. Ref No. : GR-L267BV(T,S)PA

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

W

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)

11

/16X355/16X6911/16 in.)

Heater Defrost

1

/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

- 4 -

SPECIFICATIONS

2. Ref No. : GR-L267BV(T)RA

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

W

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)

11

/16X355/16X6911/16 in.)

Heater Defrost

1

/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.)

16

/

11

1771 mm (69

1004 mm (391/2 in.)

11

908 mm (39

in.)

in.)

2

/

1

1741.5 mm (68

Front View Top View

in.)

4

/

16

3

/

11

1771 mm (69

1746.5 mm (68

/16 in.)

in.)

in.)

in.)

2

8

8

/

/

1

/

5

5

724 mm (28

779 mm (30

829 mm (32

in.)

in.)

8

/

16

5

/

5

897 mm (35

1261 mm (49

- 5 -

SPECIFICATIONS

3. Ref No. : GR-L267BV(T)R

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

11

5

W

X

D X H (35

/16

X

35

/16

11

/16

X

69

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

1

/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.)

16

/

11

1771 mm (69

1004 mm (391/2 in.)

11

908 mm (39

in.)

in.)

2

/

1

1741.5 mm (68

Front View Top View

in.)

4

/

16

3

/

11

1771 mm (69

1746.5 mm (68

/16 in.)

in.)

in.)

in.)

2

8

8

/

/

1

/

5

5

724 mm (28

779 mm (30

829 mm (32

in.)

in.)

8

8

/

/

5

1

892 mm (35

1261 mm (49

- 6 -

PARTS IDENTIFICATION

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

PWB Cover

Water Tubes

Humidity Switch

Lamp

Shelf

Snack Drawer

Vegetable Drawer

OptiChill

Door Rack

Shelf

Grab and Go

Wine Holder

Lamp

Lower Cover

Dairy Product Corner

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Bottle Guide

OptiChill Display

Water Filter

Door Rack

Egg Box

1. Ref No. : GR-L267BV(T,S)PA

- 7 -

PARTS IDENTIFICATION

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

PWB Cover

Water Tubes

Freezer

Compartment

Refrigerator

Compartment

Humidity Switch

Lamp

Shelf

Snack Drawer

Vegetable Drawer

Vegetable Drawer
/Meat Drawer

Door Rack

Shelf

Door Rack

Wine Holder

Lamp

Lower Cover

Dairy Product Corner

Door Rack

Drawer

(Wire/Plastic)

Automatic

Icemaker

Door Rack

Shelf

Bottle Guide

Door Rack

Water Filter

Egg Box

2. Ref No. : GR-L267BV(T)RA

- 8 -

PARTS IDENTIFICATION

Frame Display

Dispenser Lamp

Ice & Water

Dispenser Button

PWB Cover

Water Tubes

Lamp

Shelf

Snack Drawer

Vegetable Drawer

Vegetable Drawer
/Meat Drawer

Door Rack

Shelf

Door Rack

Lamp

Lower Cover

Dairy Product Corner

Door Rack

Drawer

(Wire/Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Door Rack

Water Filter

Humidity Switch

Bottle Guide

Egg Box

3. Ref No. : GR-L267BV(T)R

- 9 -

HOW TO INSTALL REFRIGERATOR

Adjusting
Screw

Driver

Height

Difference

Height
Difference

Height
Difference

Height
Difference

1

2

1. How to Adjust Door Height of Refrigerator

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

1. If the freezer door is lower than the refrigerator
door:

2. If the freezer door is higher than the refrigerator
door:

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

- 10 -

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

HOW TO INSTALL REFRIGERATOR

2. Filter

Replace the filter when the indicator light comes on or the
performance of the icemker 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
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’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. Flush the Water System 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 to purge the air from the system.

NOTE: - To purchase replacement water filter cartridges,

visit your local appliance dealer or part distributor.

- You can also visit our website :
www.lgappliances.com or call 1-877-714-7481.

- 11 -

HOW TO INSTALL REFRIGERATOR

2

1

Test Switch

Confirm the amount

of water

Ice maker

Too much

Too little

Optimum level

3. How to Control the Amount of Water Supplied to Icemaker.

3-1. Confirm the amount of water supplied to the icemaker.

1. Pull out the ice bin shelf in the upper part of the freezer compartment.

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.

2. Apply electricity after connecting water pipe.

1) Press test switch under the icemaker for two seconds as shown below.

2) The bell rings(ding~dong) and ice tray rotates and water comes out from the icemaker water tube.

3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small.
Put a water container under the ice tray and press test switch.

4) When ice tray rotates, the water in it will spill. Collect the spilt water and throw away into the sink.

5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray.
(refer to fig. The optimum amount of water is 110cc)

* It is acceptable if the adjusted level of water is a bit smaller than optimum level.

- 12 -

HOW TO INSTALL REFRIGERATOR

(+) Driver

1

ON

Switch ON

Switch OFF

23

Confirm the amount

of water

Optimum level

3-2. Control the amount of water supplied to the icemaker.

Caution : • Please unplug the power cord from the wall outlet and wait for more than three minutes before disconnecting

PWB cover as 310V is applied in the control panel.

1. Disconnect PWB cover from the upper part of the refrigerator.

2. Adjust the amount of water supplied by using DIP switch.

■ Water Supplying Time Control Option

REMARKS

supplied depends on DIP
switch setting conditions
and water pressure as it
is a direct tap water
connection type. (the
water supplied is
generally 80 cc to 120 cc)

PWB.

No

1

2

3

4

5

6

7

8

GR-L267BV(T)R GR-L267BV(T)RA, GR-L267BV(T,S)PA

DIP SWITCH SETTING

S1 S2

OFF OFF 6.5 SEC

ON OFF 5.5 SEC

OFF ON 7.5 SEC

ON ON 8.5 SEC

WATER

SUPPLY TIME

DIP SWITCH SETTING

S1 S2 S3

OFF OFF OFF 6.5 SEC

ON OFF OFF 5.5 SEC

OFF ON OFF 6 SEC

ON ON OFF 7 SEC

OFF OFF ON 7.5 SEC

ON OFF ON 8 SEC

OFF ON ON 9 SEC

ON ON ON 10 SEC

WATER

SUPPLY TIME

* The quantity of water

* DIP switch is on the main

1) The water supplying time is set at five seconds when the refrigerator is delivered.

2) The amount of water supplied depends on the setting time and water pressure (city water pressure).

3) If ice cube is too small, increase the water supplying time. This happens when too small water is supplied into the ice tray.

4) If ice cube sticks together, decrease the water supplying time. This happens when too much water is supplied into the ice tray.

Caution : When adjusting the amount of water supplied, adjust step by step. Otherwise the water may spill over.

3. When adjustment of control switch for the amount of water supplied is complete, check the level of water in the ice tray.

- 13 -

MICOM FUNCTION

EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOCK

Dispenser selection
button

Express Freezer/Jet Freezer
function selection button

Dispenser and button

Lock button

Dispenser Lamp On/Off button/

Filter status display RESET button

Temperature adjustment button

for refrigerator compartment

Temperature adjustment button
for freezer compartment

EXPRESS

FRZ

(EXPRESS)

ON

(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

F

WATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESET
HOLD 3SECS

FILTER

EXPRESS DISPENSER FREEZER

REFRIGERATOR

FILTER RESET/LIGHT

LOCK

EXPRESS

FRZ

ON

CUBE

LOCK

DISPENSER

BUTTON

WATER

CRUSH

3 SECS

DIGITAL CONTROL

FRZ TEMP REF TEMP

COLDEST

COLD

FILTER RESET
HOLD 3SECS

FILTER

1. Monitor Panel

1-1. GR-L267BV(T)RA, GR-L267BV(T, S)PA

1-2. GR-L267BV(T)R

- 14 -

MICOM FUNCTION

EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR FILTER/LIGHT LOCK

Display Power
saving Mode

Exhibition Mode

EXPRESS

FRZ

(EXPRESS)

ON

(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

F

WATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESET
HOLD 3SECS

FILTER

Change Display Degree from
Fahrenheit to Centigrade Mode

Buzzer sound
mute Mode

1-3. Display Second Function

1. Buzzer sound mute Mode

The buzzer sound is set to OFF.
It activates by sounding the recognition sound of “Ding~” after pressing and holding “Express FRZ” button more than 5
seconds. It inactivates when resetting the mode power.

2. Display Power saving Mode

It places display in standby mode until door is opened.
Press “Freezer” and “Express FRZ” 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 deactivate this mode is same as the
activation methods. The mode inactivates when resetting the power.

3. Change Display Degree to Centigrade Mode from Fahrenheit Mode

To change temperature display from Fahrenheit to Celsius press and hold “FREEZER” and “REFRIGERATOR” buttons
simultaneously for more than 5 seconds. Do the same to convert back to Celsius.

4. Exhibition Mode

This function is available when exhibiting a refrigerator in the shopping moll.
Function is inserted with recognition sound “Ding ~” if pressing both the “Freezer” button and the “REFRIGERATOR”
button at the same time for more than 5 seconds. If function is inserted, all basic refreezing functions at the R/F room and
the Storage room (COMP, F-FAN, C-FAN) turns off and the display normally operates. However, the dispenser function
normally operates.
The DEMO stops if pressing the button during DISPLAY DEMO, DEMO stops and the display normally operates but
performs DEMO operation again if not pressing the button again for more than 30 seconds (DEMO: Display scenario
when using the display).
Release method is same as input method.
The mode is released if power is reset.

- 15 -

MICOM FUNCTION

2. Description of Function

2-1-1. Function of Temperature Selection

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 Max Max Min Medium Min

-2 °F -5 °F -8 °F7 °F1 °F

37 °F 34 °F 32 °F 46 °F 41 °F

5
4
3
2
1

5
4
3
2
1

5
4
3
2
1

5
4
3
2
1

❉ Whenever pressing button, setting is repeated in the order of (Medium) ➝ (Medium Max) ➝ (Max) ➝ (Min) ➝

(Medium Min).

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

• Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator for minimum
2~3 days.

• Freezer Notch is fixed “Medium Max” unconcerned with display Notch during ICE Making Control Mode and Ice Maker
Stop switch is selected with “ON”.

2-1-2. Outside temperature display function

1. Outside temperature sensor at the right Hinge Cover - U of refrigerator senses ambient temperature and displays the
outside temperature in the upper of “ROOM TEMP” text on the display part.

2. Ambient temperature is displayed up to 16°F ~ 120°F and displayed as “Lo” for less than 15°F and as “HI” for more than
121°F. If the ambient temperature sensor fails, it is displayed as “Er”.

3. Since display temperature of outside temperature is temperature sensed by the ambient sensor in the hinge U of the
refrigerator room, it may differ from the outside temperature display of other household electrical appliances.

- 16 -

MICOM FUNCTION

LOCK

DISPENSER & BUTTON

3 SECS

LOCK

DISPENSER & BUTTON

3 SECS

LOCK CONTROL

Ex) Select

LOCK

Ex) Select

LOCK again

In initial Power On

/ Filter RESET

Replace indicator

light on

Classification

Filter Status

Display

FILTER RESET
HOLD 3SECS

FILTER

FILTER RESET
HOLD 3SECS

FILTER

2-1-3. Lock function (dispenser and display button lock)

1. In power application of refrigerator, the “LOCK” text is turned off at the right side of lock graphic of display with the lock
replease status.

2. If desiring to lock the dislay the dispenser and control panel, push on the LOCK button more than 3 seconds. LOCK text
is turned on at the right side of lock graphic of display with lock status.

3. The buzzer sound and control panel and dispenser function is not performed even if pressing display button other than
lock key in the lock status.

4. If desiring to release the lock status and pressing the lock button more than 3 seconds. “LOCK” text is turned off at the
right side of lock graphic of display with the lock release status.

LED

2-1-4. Filter condition display function

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

2. Water filter needs replacement once six months.

3. Water filter light and “FILTER RESET HOLD 3SECS” text turn on to tell you need to replace the filter soon.

4. After replace the filter, press and hold the lock button more than 3seconds.
Then water filter light and “FILTER RESET HOLD 3SECS” text turn off with reset status.

- 17 -

MICOM FUNCTION

DISPENSER

LED

CUBE

WATER

CRUSH

Pressing

Switch

LED (GR-L267BV(T,S)PA)

LED (GR-L267BV(T)R, GR-L267BV(T)RA)

EXPRESS/JET FRZ

EXPRESS/JET FRZ

EXPRESS

FRZ

EXPRESS EXPRESS EXPRESS

ON

EXPRESS

FRZ

ON

JET JET JET

Dispenser Iight ON/OFF

LED

DISPENSER

2-2. Dispenser use selection

You can select water or ice.

❉ Please select water, slice ice and square ice by pressing button as you

desire.

❉ Please press the push button lightly by catching and pushing in cup.

• Each graphic is indicated for the selected function.

• “Tak!” sounds if 5 seconds pass after ice comes out.

It is sound that the outlet of ice is closed.

REFERENCE : Please wait for 2-3 seconds in order to take final ice slices or drops

of water when taking out cup from the pressing switches after
taking ice or water.

2-3. Express freezing/JET freezing selection

Please select this function for prompt freezer.

• Function is repeated following below whenever pressing EXPRESS/JET FRZ button.

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

FRZ” or “JET FRZ”.

• Expressing freezer or jet freezer function automatically turns off if a fixed time passes.

2-4. Dispenser Light

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

• The dispenser light Function is repeated following below whenever pressing “FILTER RESET/LIGHT” button.

• If dispenser light continuously turns on more than 7 minutes with dispenser light button, the dispenser light turns off

automatically by compulsion.

- 18 -

MICOM FUNCTION

2-5. Express freezing

1. Express freezing is function to improve cooling speed of the freezing room by consecutively operating compressors and
freezing room fan.

2. Express freezing is released if power failure occurs and then returns to the original status.

3. Temperature setting is not changed even if selecting the express freezing.

4. The change of temperature setting at the freezing room or the cold storage room is allowed with express freezing
selected and prrocessed.

5. The cold storage room operates the status currently set with Express freezing selected and procesed.

6. If selecting the Express freezing, the Express freezing function is released after continuously operating compressor and
freezing room fan.

7. If frost removal starting time is arrived during Express freezing, Express freezing operation is done only for the remaining
time after completion of frost removal when the Express freezing operation time passes 90 minutes. If passing 90
minutes, Express freezing operation is done only for 2 hours after completion of frost removal.

8. If pressing Express freezing button during frost removal, the Express freezing LCD or LED is turned on but if pressing the
Express freezing, compressor operates after the remaining time has passed.

9. If selection Express freezing within 7 minutes (delay for 7 minutes of compressor) after the compressor stops,
compressor operates after the remaining time has passed.

10. The freezing room fan motor operates at the high speed of RPM during operation of Express freezing.

2-6. Jet Freezing (GR-L267BV(T,S)PA Model)

1. Jet freezing is function to improve cooling speed of the Jet Freezing Room in the freezer room by consecutively operating
compressor and Jet freezing box fan motor.

2. Jet freezing is released if power failure occurs and then returns to the original status.

3. Display temperature setting is not changed even if selectig the jet freezing.

4. If Jet Freezing is selected, comp (after comp delay time passes) and fan motor in freezer room will be on. The
temperature in refrigerator room will be drop and fan motor will be off for certain time, and then the fan motor in Jet
Freezing box will be on for maximum 2 hours.
After that, terminate the Jet Freezing function and display as off status.

5. To prevent from being frozen, the fan motor of jet freezing box will be on for 10 sec. by every 1hour when it doesn’t
operate.

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

7. When checking the jet freezing function, the fan motor of jet freezing box to be for 1 min. In case of pressing the freezer
adjust button and express freezing button over 1 sec.

- 19 -

MICOM FUNCTION

°F / SET TEMP

/ TIME REMAINING

MIN

FRUIT
VEGE

CHILED

ROOM

PARTIAL

FREEZING

SELECT

HR

2-7. OptiChill Function (GR-L267BV(T,S)PA Model)

1. The OptiChill is positioned at the bottom of fresh food room separately and allow a user to select and adjust a desired
temperature according to kinds of food such as meat, fish, vegetables and fruits and so on. The selected temperature to
any kinds of food let user to keep their food longer.

2. OptiChill comprises of OptiChill sensor at the rear of OptiChill and a damper between OptiChill and freezer room and a
temperature adjusting display at the top of it.

3. When powered on, the initial NOTCH of OptiChill display will be on “FRUIT VEGE”.
If only R-DOOR is OPENED, OptiChill LED will be ON.

4. Every time pressing the button, the LED shows “FRUIT VEGE”(39°F) → “CHILED ROOM”(30°F) → “PARTIAL FREEZING
(27°F)” → “FRUIT VEGE”(39°F) in orders and also shows a target temperature to be controlled at the same time, then the
NOTCH will be changed relatively.

5. The OptiChill sensor detects a desired temperature at micom, and if the temperature is satisfied, the OptiChill damper will
be closed and if the temperature is unsatisfied, the OptiChill damper will be opened and then the temperature will be
cooled.

6. If the OptiChill damper doesn’t operate for 1 hour, it will be physically operated for seconds to prevent from being frozen.

NOTCH

Partial

Freezing

Chilled

Room

Fruit

VEGE

Display 27°F30°F39°F

- 20 -

MICOM FUNCTION

Doors of freezing /
cold storage room

or home bar

BUZZER

Closing

Opening

Within

a minute

A minute

30

seconds30seconds30seconds

Opening

Closing Closing

3 Times 3 Times 3 Times 3 Times

2-8. 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 express freezing 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.

2-9. 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).

2-10. 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 home bar are closed during door open alarm, alarm is immediately
released.

2-11. Ringing of button selection buzzer

1. If pressing the front display button, “Ding ~ “ sound rings.

- 21 -

MICOM FUNCTION

2-12. 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.

2-13. Frost removal function

1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.

2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 ~ 4.5 hour.

3. Frost removal is completed if temperature of a frost 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 removal is done if frost removal sensor becomes poor (snapping or short-circuit).

2-14. Refrigerator room lamp automatically off

• Refrigerator room lamp turn on and off by refrigerator door switch.

• If refrigerator room lamp continuously turns on more than 7 minutes, the refrigerator room lamp turns off automatically by

compulsion.

- 22 -

MICOM FUNCTION

POWER

ON

COMP

ON

F-FAN

&

C-FAN

ON

R-STEP
MOTOR

DAMPER

ON

OPTICHILL

STEP

DAMPER

MOTOR

ON

FROST

REMOVAL

HEATER

OFF

FROST

REMOVAL

HEATER

ON

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

ON

0.3

sec.

PIPE

&

DISP'

HEATER

OFF

0.3

sec.

COMP

ON

0.3

sec.

F-FAN

&

C-FAN

ON

0.3

sec.

R-STEP
MOTOR

DAMPER

ON

0.3

sec.

OPTICHILL

STEP

DAMPER

MOTOR

ON

PIPE

&

DISP'

HEATER

ON

TEST

SWITCH

(PRESS

Once)

OTHER

LOAD

OFF

COMP

ON

F-FAN

&

C-FAN

ON

R-STEP
MOTOR

DAMPER

ON

OPTICHILL

STEP

DAMPER

MOTOR

CLOSE

TEST

SWITCH

(PRESS

2 Times)

COMP

OFF

F-FAN

&

C-FAN

OFF

FROST

REMOVAL

HEATER

ON

R-STEP

MOTOR

DAMPER

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.

0.3

sec.

0.3

sec.

2-15. 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

In applying Initial power TEST MODE

When temperature
of a frost removal

sensor becomes
more than 45°C
(In purchase,

movement)

When
temperature of a

frost removal
sensor becomes
less than 45°C
(In power failure,

service)

Test mode 1
(Compulsory
function)

Test mode 2
(Compulsory frost

removal)

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

■

Sequence of
load operation
when closing
F-room and
R-room.

If pressing switch
once more in the
test mode 2 or
temperature of a
frost removal
sensor is more
than 5°C, it
immediately
returns to the test
mode for initial
operation
(COMP operates
after 7 minutes).

- 23 -

MICOM FUNCTION

EXPRESS

FRZ

ON

CUBE

LOCK

DISPENSER

BUTTON

WATER

CRUSH

3 SECS

DIGITAL CONTROL

FRZ TEMP REF TEMP

COLDEST

COLD

FILTER RESET
HOLD 3SECS

FILTER

C E F DG

FRZ

TEMP

Trouble Code

Index

Trouble Code

F4
F3

F2
F1

2-16. Failure Diagnosis Function

1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product
during use of product.

2. In occurrence of failure, pressing the function adjustment button does not perform function.

3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset).

4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting
temperature for the cold storage room of display, which are placed at the display part of a refrigerator. All the display
graphics other than a failure code are turned off.

(1) GR-L267BV(T)R Model

 : On l : Off ˇ : Normal

No. Item

1

Abnormal
freezer sensor

2

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

3

Abnormal refrigerator
sensor 2 (R2)
(Upper part in the
refrigerator
compartment)

Abnormal defrost

4

sensor

Failed defrosting

5

Abnormal freezing

6

BLDC motor

Abnormal cooling

7

BLDC motor

Abnormal

8

ambient sensor

Abnormal

9

ice-maker sensor

Abnormal

10

ice-maker unit

Abnormal W/T

11

sensor

Trouble Code Index

F1 F2 F3 F4

Normal display

(Note 1)

Normal display

(Note 1)

Normal display

(Note 1)

Normal display

(Note 1)

Normal display

(Note 1)

Contents of failure

Compressor

Freezer sensor short circuit

ON for 15minutes /

OFF for 15minutes

Refrigerator sensor1 short circuit

Refrigerator sensor2 short circuit

Abnormal short circuit

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

Motor defect, hooked of lead wire
to fan, contact of structures with
fan, short or open of lead
wire(there is no signal of BLDC
motor more than 115 seconds in
operation of fan motor)

Ambient sensor short circuit

Ice-maker sensor short circuit

Faulty ice-maker unit morot or hall
ic, lead wire short circuit, faulty
motor driving circuit

Water Tank 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

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

Defrost

Heater

●●

●●

●●

No defrost

●●

●●

●●

●●

●●

●●

●●

Stepping

motor damper

●●

Full opening for

10 minutes/

Full closing for

15 minutes

●●

●●

●●

●●

●●

●●

●●

●●

●●

- 24 -

MICOM FUNCTION

Failure Code Indication Part

EXPRESS

FRZ

(EXPRESS)

ON

(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

F

WATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESET
HOLD 3SECS

FILTER

C F A B

E

D

(2) GR-L267BV(T)RA, GR-L267BV(T,S)PA Model

Failure code indication part

No. Item

1

Abnormal
freezer sensor

2

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

3

Abnormal refrigerator
sensor 2 (R2)
(Middle part in the
refrigerator
compartment)

Abnormal defrost

4

sensor

Failed defrosting

5

Abnormal freezing

6

BLDC motor

Abnormal cooling

7

BLDC motor

Abnormal

8

communication

Abnormal

9

ambient sensor

Abnormal

10

Optichill sensor

Abnormal

11

ice-maker sensor

Abnormal

12

ice-maker unit

Abnormal

13

W/T sensor

Abnormal

14

Drive Micom
Communication

Freezer room

notch temperature

display

Er FS

Er rS

Normal display

Er dS

Er dH

Er FF

Er CF

Er CO

Normal display

Normal display

Normal display

Normal display

Normal display

Normal display

Refrigerator room

notch temperature

display

(Note 2)

(Note 2)

(Note 1)

(Note 1)

(Note 1)

(Note 1)

(Note 1)

Contents of failure

Freezer sensor short circuit

Refrigerator sensor1 short circuit

Refrigerator sensor2 short circuit

Abnormal short circuit

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

Motor defect, hooked of lead wire
to fan, contact of structures with
fan, short or open of lead
wire(there is no signal of BLDC
motor more than 115 seconds in
operation of fan motor)

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

Ambient sensor short circuit

Optichill sensor short circuit

Ice-maker sensor short circuit

Faulty ice-maker unit motor or hall
ic, lead wire short circuit, faulty
motor dirving circuit.

Water Tank Sensor short circuit

Abnormal of TR, Micom between
Set Micom and Drive Micom
(OptiChill Display)in MAIN PCB

Product operation status in failure

Compressor

ON for 15minutes /
OFF for 15minutes

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

Freezing

BLDC motor

BLDC motor

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

Standard

RPM

OFF

Standard

RPM

Standard

RPM

●●

●●

●●

●●

●●

●●

Cooling

●●

●●

●●

●●

●●

●●

OFF

●●

●●

●●

●●

●●

●●

●●

: Proper operation

●●

Defrost

Heater

motor damper

●●

●●

Full opening for

Full closing for

●●

No defrost

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

Stepping

●●

10 minutes/

15 minutes

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

●●

- 25 -

MICOM FUNCTION

Note1) R2-sensor, OptiChill sensor and water tank sensor, Ice maker-sensor, Ice maker Unit are not indicated on the failure

indicating part but indicated in checking Display(When pressing for more than the button of freezing temperature and
super freezer button for more than 1 second).

R2-sensor (middle room)
or Abnormal Drive Micom
Communication

OptChill sensor or
Water tank sensor

Ice-maing sensor

Ice-maker unit

Ambient sensor
(Better1 Model Only)

Note2) Freezer room notch temperature display and refrigerator room notch temperature display(Failure code indication

part) are normally indicated in abnormal ambient sensor, and “Er” indicated on the amvient temperature
display(except for the ambient temperature display, other LEDs or LCDs are indicated normally)

✻ LCD(LED) check function: If simultaneously pressing express freezer button and freezing temperature adjustment button

for a second, a back light is turned on and all display LCD(LED) graphics on. If releasing the
button, the LCD(LED) graphic displays the previous status, the back light is turned off (LCD
graphic and back light ON/OFF check).

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

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

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

The other LED or
LCD Graphics
Turn On.

- 26 -

MICOM FUNCTION

EXPRESS

DIGITAL CONTROL

FRZ TEMP REF TEMP

JET

CUBE

FILTER RESET
HOLD 3SECS

ROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH

3 SECS

F

C

F

C

F

C

FILTER

2-17. 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.

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
(open of baffle)

5. Optichil 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
(closing of baffle)

5. OptiChil stepping motor damper is completely
closed.

6. All display LEDs or LCD graphics turn off.
GR-L267BV(T)RA, GR-L267BV(T,S)PA :
Except for (A)22 (B)22 LEDs
GR-L267BV(T)R : Except for only middle
Notch Bar Graphics

Return to the initial status.

Freezing fan turns off in
door opening.

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

Compressor will operate
after delay for 7 minutes

TEST MODE1 STATUS DISPLAY

TEST MODE2 STATUS DISPLAY

- 27 -

MICOM FUNCTION

2-18. Function of dispenser and water dispenser built-in

1. This is function allowing ice and water to come outside without opening door.

2. If pressing the dispenser switch (rubber button) after selecting ice (cube ice, crushed ice) or water, ice and water
equivalent to each come out. However, the duct doors are opened by electrical solenoid valve (Duct Door Solenoid) if
pressing the press switch in case of selecting ICE. If pressing the dispenser press switch and then detaching the hands,
the duct door is closed after it is opened for 5 seconds.

3. Function allowing ice and water to come stops if freezing room doors are opened.

4. If there is no Off signal even when 3 minutes have passed while pressing the dispenser press switch after selecting ice
(cube ice, crushed ice) or water, geared motor and solenoid (Cube, Water) is automatically turned off. However, the
solenoid (duct door) is stop 5 seconds after Off (to prevent short-circuit of a coil due to overheat of solenoid).

5. Dispenser Lamp On/Off function
Lamp on the dispenser part is turned on if pressing the dispenser press switch after selecting ice (cube ice, crushed ice)
or water. If detaching the hands, it is turned off.

6. Selection function of water/crushed/ cube ice

1) This is function to allow selection of water/crushed/ cube ice function depending on user’s selection. Display and
selection is done if pressing the dispenser selection button.

2) In the initial Power On, cube ice is automatically selected.

3) In selecting cube ice, geared motor is operated so that crushed ice can be supplied outside if pressing the press switch
when ice is formed in the ice storage container (Bank, Ice).

4) In selecting cube ice, geared motor is operated so that cube ice can be supplied outside if pressing the press switch
when ice is formed in the ice storage container (Bank, Ice).

7. Water dispenser function

1) It is displayed for selection if user selects water at the function adjustment part.

2) Water dispenser function is a type directly connected to a water pipe. The water solenoid valve built-in at the right side
of the Back plate is opened so that water can be supplied if selecting Water from the function adjustment part and then
pressing the press switch.

- 28 -

EXPLANATION FOR MICOM CIRCUIT

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:

Part VA1 CE1 CE2 CE3 CE4 CE5

Voltage 120 Vac 160 Vdc 14 Vdc 12 Vdc 15.5 Vdc 5 Vdc

(1) GR-L267BV(T)R

- 29 -

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 30 -

EXPLANATION FOR MICOM CIRCUIT

1-2. Oscillation circuit

The oscillation circuit generates a basic clock signal for synchronization and time calculation related to the transmission of
data and calculations made by the MICOM (IC1). The oscillator (OSC1) must always be replaced with an exact rated part,
because if this spec is changes, the time calculations of the MICOM will be affected and it might not work at all.

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 31 -

1-3. Reset circuit

The RESET circuit allows various parts of the MICOM, such as RAM, defrosting, etc., to be restarted from the initial state
when power is interrupted or restored. A LOW signal applied to the reset terminal for 10 ms causes the MICOM to reset
itself. During normal operation, the voltage at the reset terminal is 5 Vdc. If the reset fails, the MICOM will not operate.

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 32 -

EXPLANATION FOR MICOM CIRCUIT

1-4. Load/dispenser operation, door opening circuit

1. LOAD DRIVING CIRCUIT

✽ The fan operates at the regular speed even if the door of the refrigerator or freezer is opened. When the doors are closed,

the fan reverts to its original speed.

✽ (A), (B), (C), and (D) of door switch for the freezer or refrigerator are connected to the door open sensing circuit in parallel

toward both ends of switch to determine door open at MICOM.

✽ In the TEST mode, the fan will stop if any door is opened. It will resume operation when the door is closed.

Type of Load Compressor

Measuring part (IC6) IC6-16 IC6-13 IC6-12 IC6-15 IC6-14

Status

ON Within 1 V

OFF 12 V

Frost Removal

Heater

AC Converting

Relay

Refrigerator

LAMP

Dispensor

Heater

(1) GR-L267BV(T)R

- 33 -

EXPLANATION FOR MICOM CIRCUIT

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

Type of Load Compressor

Measuring part (IC6) IC6-15 IC6-11 IC6-10 IC6-14 IC6-12

Status

ON Within 1 V

OFF 12 V

Frost Removal

Heater

AC Converting

Relay

Refrigerator

LAMP

Dispensor

Heater

- 34 -

EXPLANATION FOR MICOM CIRCUIT

2. Dispenser operation circuit

(1) GR-L267BV(T)R

1) Check load driving status

Type of Load

Measuring part IC6-11 IC6-10 IC7-15 IC7-13

Status

2) Lever Switch sensing circuit

Measuring part

Lever S/W

On(Press)

OFF 5V

ON Within 1 V

OFF 12 V

GEARED

MOTOR

5 V

0 V

SOLENOID

CUBE

IC1(Micom) (No. 16)

WATER VALVE

WATER

(60 Hz)

SOLENOID

DISPENSER

- 35 -

EXPLANATION FOR MICOM CIRCUIT

(2) GR-L267BV(T)RA

1) Check load driving status

Type of Load

Measuring part IC6-11 IC6-10 IC7-15 IC7-13

Status

2) Lever Switch sensing circuit

Measuring part

Lever S/W

On(Press)

OFF 5V

ON Within 1 V

OFF 12 V

GEARED

MOTOR

5 V

0 V

SOLENOID

CUBE

IC1(Micom) (No. 16)

WATER VALVE

WATER

(60 Hz)

SOLENOID

DISPENSER

- 36 -

EXPLANATION FOR MICOM CIRCUIT

(3) GR-L267BV(T,S)PA

1) Check load driving status

Type of Load

Measuring part IC7-20 IC7-19 IC7-17 IC7-15

Status

2) Lever Switch sensing circuit

Measuring part

Lever S/W

On(Press)

OFF 5V

ON Within 1 V

OFF 12 V

GEARED

MOTOR

5 V

0 V

SOLENOID

CUBE

IC1(Micom) (No. 16)

WATER VALVE

WATER

(60 Hz)

DISPENSER

- 37 -

SOLENOID

EXPLANATION FOR MICOM CIRCUIT

3. Door opening sensing circuit

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

Measuring part

Door of Freezer / Refrigerator

Closing 5 V ( A - B , C - D . Switch at both ends are at Off status)

Opening 0 V ( A - B , C - D . Switch at both ends are at On status)

✽ Since door switches (A) and (B) are interconnected, if either fails, the other will not respond properly.
✽ If either switch fails, the light will not come on.

IC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin

- 38 -

EXPLANATION FOR MICOM CIRCUIT

E

F

A

B

D

C

A

B

C

D

F

E

RW1
10KF

CE18

R73

CC32

1-5. Temperature sensing circuit

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

- 39 -

EXPLANATION FOR MICOM CIRCUIT

E

F

B

A

D

G

C

(3) GR-L267BV(T,S)PA

The circuits involving the freezer and refrigerator sensors controls the temperature in both the freezer and the refrigerator.
The Icemaker sensor detects when ice is made. The defrost sensor determines both the need for defrosting and the
efficiency of the defrost operation. See the table below for voltages and checkpoints.

SENSOR CHECK POINT

Freezing sensor POINT A Voltage

Defrost sensor POINT B Voltage

Refrigerator sensor 1 POINT C Voltage

Refrigerator sensor 2 POINT D Voltage 0.5 V~4.5 V 0 V 5 V

Room temperature sensor POINT E Voltage

Water tank sensor POINT F Voltage

Optichill sensor POINT G Voltage

NORMAL(-30 °C ~ 50 °C) IN

SHORT IN OPEN

- 40 -

EXPLANATION FOR MICOM CIRCUIT

1-6. Switch entry circuit

The following circuits are sensing signal form the test switch, damper motor reed switch for testing and diagnosing the
refrigerator.

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 41 -

EXPLANATION FOR MICOM CIRCUIT

1-7. Option designation circuit (model separation function)

(1) GR-L267BV(T)RA

(2) GR-L267BV(T,S)PA

The circuits shown above vary according to which features are included on your particular model.

uThese circuits are preset at the factory and cannot be altered.

NOTE: The chart makes absolutely no sense. You have Optichill no matter which way the connection is set.

Separation Connection Status Application Standard

OP1

Connection OptiChill exist

OUT OptiChill don’t exist

- 42 -

EXPLANATION FOR MICOM CIRCUIT

1-8. Stepping motor operation circuit

(1) GR-L267BV(T)R

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 43 -

EXPLANATION FOR MICOM CIRCUIT

INA

INB

A

B

A

B

CCW (Reverse rotation) (Positive rotation) CW

The motor is driven by magnetism formed in the areas of the coils and the stator. Rotation begins when a HIGH signal is
applied to MICOM Pin 33 of IC10 (TA7774F). This causes an output of HIGH and LOW signals on MICOM pins 34 and 35.

Explanation) The stepping motor is driven by sending signals of 3.33 mSEC via MICOM pins 33, 34, and 35, as shown in

the chart below. These signals are output via terminals 10, 11, 14, and 15 via input terminals 3, 6, and 8 of
IC10 (TA7774F), the motor drive chip. The output signals allow the coils wound on each phase of the stator to
form a magnetic field, which causes rotation. Input to the terminals INA and INB of IC10 as shown in the chart
below drives the motor.

- 44 -

EXPLANATION FOR MICOM CIRCUIT

1-9. Fan motor driving circuit (freezer, mechanical area)

1. The circuit cuts all power to the fan drive IC, resulting in a standby mode.

2. This circuit changes the speed of the fan motor by varying the DC voltage between 7.5 Vdc and 16 Vdc.

3. This circuit stops the fan motor by cutting off power to the fan when it senses a lock-up condition.

a , d part b part e part

Motor OFF 5V 2V or less 2V or less

Motor ON 2 ~ 3V 12 ~ 14V 8 ~ 16V

(1) GR-L267BV(T)R

b

a

e

d

- 45 -

EXPLANATION FOR MICOM CIRCUIT

a

b

d

e

b

a

d

e

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 46 -

EXPLANATION FOR MICOM CIRCUIT

Temperature compensation at refrigerator

Temperature compensation at freezer

Temperature compensation at refrigerator

Temperature compensation at freezer

1-10. Temperature compensation and temperature compensation circuit

1. Temperature compensation in freezer and refrigerator

(1) GR-L267BV(T)R (2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

Freezer Refrigerator

Resistance value Temperature Resistance value Temperature Remarks

(RCF1) compensation (RCR1) compensation

180 kΩ +5 °C [+9°F] 180 kΩ +2.5 °C [+4.5°F] Warmer

56 kΩ +4 °C [+7.2°F] 56 kΩ +2.0 °C [+3.6°F]

33 kΩ +3 °C [+5.4°F] 33 kΩ +1.5 °C [+2.7°F]

18 kΩ +2 °C [+3.6°F] 18 kΩ +1.0 °C [+1.8°F]

12 kΩ +1 °C [+1.8°F] 12 kΩ +0.5 °C [+0.9°F]

10 kΩ 0 °C [0°F] 10 kΩ 0 °C [0°F]

8.2 kΩ -1 °C [-1.8°F] 8.2 kΩ -0.5 °C [-0.9°F]

5.6 kΩ -2 °C [-3.6°F] 5.6 kΩ -1.0 °C [-1.8°F]

3.3 kΩ -3 °C [-5.4°F] 3.3 kΩ -1.5 °C [-2.7°F]

2 kΩ -4 °C [-7.2°F] 2 kΩ -2.0 °C [-3.6°F]

470 Ω -5 °C [-9°F] 470 Ω -2.5 °C [-4.5°F] Cooler

u Temperature compensation table by adjustment value (difference value against current temperature)

Ex) If you change compensation resistance at a refrigerator (RCR1) from 10 kΩ (current resistance) to 18 kΩ (modified

resistance), the temperature at the cold storage will increase by +1°C[+1.8°F].

Reference temperature

- 47 -

EXPLANATION FOR MICOM CIRCUIT

u Temperature compensation table at the refrigerator is as follows:

Modification

resistance

Current
resistance

470Ω [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F] [9 °F]

2 kΩ [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F] [8.1 °F]

3.3 kΩ [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F] [7.2 °F]

5.6 kΩ [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F] [6.3 °F]

8.2 kΩ [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F] [5.4 °F]

Refrigerator

470 Ω 2 kΩ 3.3 kΩ 5.6 kΩ 8.2 kΩ 10 kΩ 12 kΩ 18 kΩ 33 kΩ 56 kΩ 180 kΩ

No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C5 °C

change

0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C 4.5 °C

Down change

1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C4 °C

Down

1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C 3.5 °C

Down Down Down

2 °C 1.5 °C1 °C 0.5 ° No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C3 °C

Down Down Down

Up Up Up Up Up Up Up Up Up Up

Up Up Up Up Up Up Up Up Up

Down

change

Up Up Up Up Up Up Up Up

change

Drop

Up Up Up Up Up Up Up

change

Up Up Up Up Up Up

(RCR1) 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C 2.5 °C

10 kΩ [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F] [4.5 °F]

Down Down Down Down Down

3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C2 °C

12 kΩ [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F] [3.6 °F]

Down Down Down Down Down Down

3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C 1.5 °C

18 kΩ [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F] [2.7 °F]

Down Down Down Down Down Down Down

4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C1 °C

33 kΩ [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F] [1.8 °F]

Down Down Down Down Down Down Down Down

4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °C No 0.5 °C

56 kΩ [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down

5 °C 4.5 °C4 °C 3.5 °C3 °C 2.5 °C2 °C 1.5 °C1 °C 0.5 °CNo

180 kΩ [9 °F] [8.1 °F] [7.2 °F] [6.3 °F] [5.4 °F] [4.5 °F] [3.6 °F] [2.7 °F] [1.8 °F] [0.9 °F]

Down Down Down Down Down Down Down Down Down Down

u Temperature compensation at the freezer is performed the same as at the refrigerator. The value for the freezer is twice

that of the refrigerator.

u This circuit enters the necessary level of temperature compensation for adjusting the appliance. The method is the same

for every model in this appliance family.

change

Up Up Up Up Up

change

Up Up Up Up

change

Up Up Up

change

Up Up

change

Up

change

- 48 -

EXPLANATION FOR MICOM CIRCUIT

2. Compensation circuit for temperature at freezer

(1) GR-L267BV(T)RA (2) GR-L267BV(T,S)PA

Temperature compensation in CUT

JCR1 +1 °C [+1.8 °F]

JCR2 +1 °C [+1.8 °F]

JCR3 -1 °C [-1.8 °F]

JCR4 -1 °C [-1.8 °F]

+2 °C [+3.6 °F]

-2 °C [-3.6 °F]

Compensation Compensation

for weak-cold for over-cold

JCR3 JCR4 JCR1 JCR2

CUT -1 °C [-1.8 °F]

CUT -1 °C [-1.8 °F]

CUT +1 °C [+1.8 °F]

CUT +1 °C [+1.8 °F]

CUT CUT -2 °C [-3.6 °F]

CUT CUT +2 °C [+3.6 °F]

CUT CUT 0 °C [0 °F]

CUT CUT 0 °C [0 °F]

CUT CUT 0 °C [0 °F]

CUT CUT 0 °C [0 °F]

CUT CUT CUT -1 °C [-1.8 °F]

CUT CUT CUT +1 °C [+1.8 °F]

CUT CUT CUT CUT 0 °C [0 °F]

Temperature compensation value

at refrigerator

0 °C (In shipment from factory)

Remarks

u This circuit allows adjustment of the set temperature for compensation by changing jumpers at locations JCR1~JCR4.

- 49 -

EXPLANATION FOR MICOM CIRCUIT

EXPRESS

FRZ

ON

CUBE

LOCK

DISPENSER

BUTTON

WATER

CRUSH

3 SECS

DIGITAL CONTROL

FRZ TEMP REF TEMP

COLDEST

COLD

FILTER RESET
HOLD 3SECS

FILTER

Main MICOM LCD(LED) dedicated MICOM

DC 12V

GND

Transmission (error status)

Reception (notch status)

Main PCB L/Wire FD/H(4-wires) Display PCB

1-11. Communication circuit and connection L/Wire between main PCB and display PCB

The following communication circuit is used for exchanging information between the main MICOM of the Main PCB and the
dedicated MICOM of the LED (LCD) Display PCB.

A bi-directional lead wire assembly between the two boards is required for the display to function properly.

Poor communication occurs if a continuous information exchange fail to continue for more than 2 minutes between main
MICOM of main PCB and LCD (LED) dedicated MICOM for LCD (LED) control of display PCB.

(1) GR-L267BV(T)R

- 50 -

EXPLANATION FOR MICOM CIRCUIT

EXPRESS

FRZ

ON

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

F

WATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESET
HOLD 3SECS

FILTER

EXPRESS

JET

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

F

WATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESET
HOLD 3SECS

FILTER

(2) GR-L267BV(T)RA

(3) GR-L267BV(T,S)PA

- 51 -

EXPLANATION FOR MICOM CIRCUIT

2) Sensor resistance characteristics table

Measuring Temperature (°C) Freezing Sensor

-20 °C 22.3 kΩ 77 kΩ

-15 °C 16.9 kΩ 60 kΩ

-15 °C 13.0 kΩ 47.3 kΩ

-5 °C 10.1 kΩ 38.4 kΩ

0 °C 7.8 kΩ 30 kΩ

+5 °C 6.2 kΩ 24.1 kΩ

+10 °C 4.9 kΩ 19.5 kΩ

+15 °C 3.9 kΩ 15.9 kΩ

+20 °C 3.1 kΩ 13 kΩ

+25 °C 2.5 kΩ 11 kΩ

+30 °C 2.0 kΩ 8.9 kΩ

+40 °C 1.4 kΩ 6.2 kΩ

+50 °C 0.8 kΩ 4.3 kΩ

Cold storage sensor 1&2

Frost removal sensor, Outside sensor

u Resistance value allowance of sensor is ±5%.
u When measuring the resistance value of the sensor, allow the temperature of that sensor to stabilize for at least 3 minutes

before measuring. This delay is necessary because of the sense speed relationship.

u Use a digital tester to measure the resistance. An analog tester has to great a margin of error.
u Resistance of the cold storage sensor 1 and 2 shall be measured with a digital tester after separating CON8 of the PWB

ASSEMBLY and the MAIN part.

u Resistance of the freezing sensor shall be measured with a digital tester after separating CON7 of the PWB ASSEMBLY

and the MAIN part.

- 52 -

EXPLANATION FOR MICOM CIRCUIT

1-12. OptiChill stepping MOTOR/Display

(1) GR-L267BV(T,S)PA

1-13. Jet freezing

(1) GR-L267BV(T,S)PA

- 53 -

EXPLANATION FOR MICOM CIRCUIT

2. PWB parts diagram and list

2-1. PWB Assembly, main part diagram

(1) GR-L267BV(T)R

- 54 -

EXPLANATION FOR MICOM CIRCUIT

(2) GR-L267BV(T)RA

- 55 -

EXPLANATION FOR MICOM CIRCUIT

(3) GR-L267BV(T,S)PA

- 56 -

EXPLANATION FOR MICOM CIRCUIT

2-2. Parts list

(1) GR-L267BV(T)R

- 57 -

EXPLANATION FOR MICOM CIRCUIT

- 58 -

EXPLANATION FOR MICOM CIRCUIT

(2) GR-L267BV(T)RA

- 59 -

EXPLANATION FOR MICOM CIRCUIT

- 60 -

EXPLANATION FOR MICOM CIRCUIT

(3) GR-L267BV(T,S)PA

- 61 -

EXPLANATION FOR MICOM CIRCUIT

- 62 -

EXPLANATION FOR MICOM CIRCUIT

4

APPLICATION

No

P/NO

-

-
1

1

2
3

-

-

1

-

6870JB8189A

DESCRIPTION

REFLECTOR

PWB(PCB)

A WORK

CHD-PJT BETTER HIPS

SPEC

BETTER1

IL SAN

DAEDUCK

MAKER REMARK

-

FR1(STH)

CONNECTOR (CIRC),WAFER

NAME PLATE,P(H)

13

616

15

14

6600RRT002J SWITCH,TACT

6630JB8004J

4140JB1045A

-

-

-

-

44

11

12

10

9

1

-

-

1

8

7

6

5

JPT1138A JEIL 12VDC 50MA SMD

SMAW250-10

03 CH-PJT QF/JET MODULE USA

6

-

0DSRM00068A DIODE,SWITCHING

0DLLE0048AA LED ULTRA YELLOW GREEN

JEIL SW101..106

YEON HO

SEOUL

CON101

-

-

-

-

-

-

-

-

ROHM D101..106

LEDTECH L101..144

CHD-PJT BETTER1 MODULE DISPLAY

RLS4148 ROHM R/TP LLDS(LL-34) 75V 200MA

CHD-PJT

Qty

SW101(QF) SW102(S) SW105(FC)SW104(R) SW106(LOCK)SW103(F)

2-3. DISPLAY ASSEMBLY part diagram

(1) GR-L267BV(T)R

- 63 -

(2) GR-L267BV(T)RA, GR-L267BV(T,S)PA

- 64 -

2-4. DISPLAY circuit diagram

SW102 SW105

L115,116

( )

D105

L117,118 L119,120

( )

SW104

D104D101

(Lamp)

SW103

L139..142L125..128

SW101 SW106

(?ON)

L113,114

(})

L121..124

( )

(D0)(<)

L133,134

1N4148X6

L111,112

L135..138

D102

(

}/ )

(

/)

D106D103

(})

L101,102

(

)

L103,104

( }/ )

L107,108

( /

)

L143,144

(?ON)

( )

L109,110L105,106

10

9

8
7

6

5

4

3

2

1

L129..132

(p )

(1) GR-L267BV(T)R

- 65 -

EXPLANATION FOR MICOM CIRCUIT

(2) GR-L267BV(T)RA, GR-L267BV(T,S)PA

- 66 -

EXPLANATION FOR MICOM CIRCUIT

3. PWB Circuit Diagram may vary according to model.

(1) GR-L267BV(T)R

- 67 -

EXPLANATION FOR MICOM CIRCUIT

- 68 -

(2) GR-L267BV(T)RA

- 69 -

- 70 -

(3) GR-L267BV(T,S)PA

- 71 -

- 72 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

• Level Ice Maker Cube Mould for “Initial Control”
after power is input.

Power Input

Initial Control

Ice Making Control

Ice Ejection Control

Water Supply Control

Test Control

• Wait until the water in the cube mould is frozen
after ice maker starts operation.

• Check ice bank is full of ice by rotating ice ejection
motor in normal and reverse direction and eject ice into
the ice bank if ice bank is not full.

• This is for refrigerator assembly line and service. When “ice making test switch” is pressed,
it operates in the following steps: initial ice ejection water supply control steps.

• Conduct “Ice Making Control” after supplying water into the ice maker
cube mould by operating water valve.

1. Working Principles

1-1. Ice Maker Working Principles

1-2. Dispenser Working Principles

1. This function is available in Model GR-L267BV(T)R, GR-L267BV(T)RA, GR-L267BV(T,S)PA where water and ice are
available without opening freezer compartment door.

2. “Crushed Ice” is automatically selected when power is initially applied or reapplied after power cut.

3. When dispenser selection switch is continuously pressed, light is on in the following sequence:
“Water” → “Cube Ice” → “Crushed Ice”.

4. Lamp is on when dispenser rubber button is pressed and vice versa.

5. When dispenser crushed ice rubber button is pressed, dispenser solenoid and geared motor work so that crushed ice can
be dispensed if there is ice in the ice bank.

6. When dispenser cube ice rubber button is pressed, dispenser solenoid, cube ice solenoid and geared motor work so that
cube ice can be dispensed if there is ice in the ice bank.

7. When dispenser water rubber button is pressed, water valve opens and water is supplied if water valve is normally
installed on the right side of the machine room.

8. Ice and water are not available when freezer door is open.

- 73 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

2. Function of Ice Maker

2-1. Initial Control Function

1. When power is initially applied or reapplied after power cut, it detects level of ice maker cube mould after completion of
MICOM initialization. The detecting lever moves up and down.

2. The level of ice maker cube mould is judged by output signal, high and low signal, of Hall IC. Make the cube mould to be
horizontal by rotating ice ejection motor in normal or reverse direction so that High/Low signal can be applied to MICOM
Pin No. 42.

3. If there is no change in signals one minute after the geared motor starts to operate, it stops icemaker operation and check
the signal every hour. It resets initialization of icemaker when it becomes normal.

4. It judges that the initial control is completed when it judges the ice maker cube mould is horizontal.

5. Ice ejection conducts for 1 cycle irrespect of ice in the ice bank when power is initially applied.

2-2. Water Supply Control Function

1. This is to supply water into the ice maker cube mould by operating water valve in the machine room when ice ejection
control is completed and ice maker mould is even.

2. The quantity of water supplied is determined by DIP switch and time.

<Water Supply Quantity Table>

REMARKS

supplied depends on DIP
switch setting conditions
and water pressure as it
is a direct tap water
connection type. (the
water supplied is
generally 80 cc to 120 cc)

PWB.

No

1

2

3

4

5

6

7

8

GR-L267BV(T)R GR-L267BV(T)RA, GR-L267BV(T,S)PA

DIP SWITCH SETTING

S1 S2

OFF OFF 6.5 SEC

ON OFF 5.5 SEC

OFF ON 7.5 SEC

ON ON 8.5 SEC

WATER

SUPPLY TIME

DIP SWITCH SETTING

S1 S2 S3

OFF OFF OFF 6.5 SEC

ON OFF OFF 5.5 SEC

OFF ON OFF 6 SEC

ON ON OFF 7 SEC

OFF OFF ON 7.5 SEC

ON OFF ON 8 SEC

OFF ON ON 9 SEC

ON ON ON 10 SEC

WATER

SUPPLY TIME

* The quantity of water

* DIP switch is on the main

3. If water supply quantity setting is changed while power is on, water supplies for the amended time. If DIP switch is
changed during water supply, water shall be supplied for the previous setting time. But it will supply for the amended time
from the next supply.

4. When water supply signal is applied to water and ice valves at the same time during water supply, water shall be supplied
to water valve. If water supply signal is applied to ice valve during water supply, water shall be supplied to both water and
ice valves.

2-3. Ice Making Control Function

1. Ice making control is carried out from the completion of water supply to the completion of ice making in the cube mould.
Ice making sensor detects the temperature of cube mould and completes ice making. (ice making sensor is fixed below
ice maker cube mould)

2. Ice making control starts after completion of water supply control or initial control.

3. It is judged that ice making is completed when ice making sensor temperature reaches at -8°C after 100 minutes when
water is supplied to ice maker cube mould.

4. It is judged that ice making is completed when ice maker sensor temperature reaches below -12 °C after 20 minutes in
condition 3.

- 74 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

Bank is

not full

HALL IC
OUTPUT
SIGNALS

Bank is

full

HALL IC
OUTPUT
SIGNALS

ICE CHECKING

AXIS

ICE CHECKING LEVEL 30°

Maximum tilting

point

Ice making

(Original point)

Lock

2±1 sec

9±3 sec

8±3 sec

Ice Checking Ice Ejection

Lock

Horizontal

Conditions

Level Retrun

Conditions

2-4. Ice Ejection Control Function

1. This is to eject ice from ice maker cube mould after ice making is completed.

2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed ice
ejection but waits. If the ice bank is full, ice ejection motor rotates in normal direction in every hour to check the condition
of ice bank. If the ice bank is not full, the water supply control starts after completion of ice ejection control. If the ice bank
is full, ice ejection motor rotates in reverse direction and sops under ice making or waiting conditions.

3. If ice bank is not full, ice ejection starts. The cube mould tilts to the maximum and ice is separated from the mould and ice
checking lever raises.

4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3.6 seconds when ice
ejection motor rotates in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection motor
operates, ice ejection motor stops as ice ejection motor or hall IC is out of order.

5. If ice ejection motor or Hall IC is abnormal, ice ejection motor rotates in normal direction to exercise initial operation. It
resets the ice maker if ice ejection motor or Hall IC is normal.

6. The mould stops for 1 second at maximum tilted conditions.

7. The mould returns to horizontal conditions as ice ejection motor rotates in reverse direction.

8. When the mould becomes horizontal, the cycle starts to repeat:
Water Supply → Ice Making → Ice Ejection → Mould Returns to Horizontal

- 75 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

2-5 Test Function

1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic
ice maker. The test function starts when the test switch is pressed for more than 0.5 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If mould is
full of ice during test function operation, ice ejection control and water supply control do not work.

3. When test switch is pressed for more than 0.5 second in the horizontal conditions, ice ejection starts irrespect of the
mould conditions. Water shall be splashed if test switch is pressed before the water in the mould freezes. Water shall be
supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection,
returning to the horizontal conditions, and water supply can be checked by test switch. When test function performs
normally, buzzer sounds and water supply shall carry out. Check it for repair if buzzer does not sound.

4. When water supply is completed, the cycle operates normally as follows: Ice making → Ice ejection → Returning to
horizontal conditions → Water supply

5. Remove ice from the ice maker cube mould and press test switch when ice maker cube mould is full of ice as ice ejection
and water supply control do not work when cube mould is full of ice.

2-6. Other functions relating to freezer compartment door opening

1. When freezer door is open, ice dispenser stops in order to reduce noise and ice drop.

2. When freezer door is open during ice ejection and cube mould returning to horizontal condition, ice ejection and cube
mould level return proceed.

3. When freezer door is open, geared motor and cube ice solenoid immediately stop and duct door solenoid stops after 5
seconds.

4. Water dispenser stops in order to protect water drop when freezer door is open.

5. Test function operates normally irrespect of refrigearator compartment door opening.

- 76 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

No

Yes

Yes

Yes

No

No

No

No

Yes

Yes

Is DC Power (5V and 12V)

output normal?

Failed DC Power

• Check DC power (5V, 12V).

Change main PWB

Is cube ice LCD off during

troubleshooting check?

Failed ice making sensor

• Check the resistance of
both ends (1,2) of ice making
sensor of CON9.

• Defects between ice making
sensor and board
(Pin No. 60 of IC1)

Replace Ice making
Sensor

Is Crushed Ice LCD off during

troubleshooting check?

Failed Ice Maker Unit

• Is the resistance of both ends
(9,10) of ice ejection motor of
CON9 between 18 and 22Ω?

• Is ice ejection motor drive circuit
(IC11 and peripheral circuits)
normal?

• Defects between Hall IC and
Board (Pin No. 42 of IC1).

• Confirm ice ejection and level
return when pressing
test switch.

Replace Ice Maker Unit

Replace Main PWB

Are ice

ejection and level return

normal when test switch is

pressed for more than 0.5 second?

Does the bell

sound once?

Failed ice maker unit test switch

• Are both ends (5,6) of CON9
test switch open?

• Defects between test switch
and board (Pin No. 38 of IC1).

• Are both ends (3,4) of CON9
ice maker stop switch short?

Replace Ice maker Unit

Replace water
supply valve

• Is power applied to water
supply valve?

• Does the water supply
valve work normally?

• Is the water supply line
normally connected?

Poor water supply

Is water suppy normal

after Ice ejection and level return

by ice ejection motor?

Normal

3. Ice Maker Troubleshooting

* Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more

than 1 second. (ice maker is normal if all leds are on): refer to trouble diagnposis function in MICOM
function 2-8 (page 21)

- 77 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

4. Ice Maker Circuits

(1) GR-L267BV(T)R

2) GR-L267BV(T)RA

- 78 -

ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

(3) GR-L267BV(T,S)PA

The above ice maker circuits are applied to GR-L267BV(T)R, GR-L267BV(T)RA, GR-L267BV(T,S)PA and composed of ice

maker unit in the freezer and ice maker driving part of main PWB. Water is supplied to the ice maker cube mould through

the solenoid relay for ice valve of solenoid valve in the machine room by opening valve for the set time. Water supply

automatically stops when water supply time is elapsed. This circuit is to realize the functions such as ice ejection of ice

maker cube mould, ice full detection, leveling, ice making temperature detection, etc. Refer to the temperature detecting

circuits of Main PWB for ice making temperature detection. Ice maker test switch input detection is the same as the door

switch input detection circuit of main PWB.

1. It is to force to operate during operation test, service, and cleaning. The test switch is mounted under the automatic ice
maker. The test function starts when the test switch is pressed for more than 0.5 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If cube
mould is full of ice during test function operation, ice ejection control and water supply control do not work.

3. Ice ejection carries out irrespect of ice formation in the ice making tray if test switch is pressed for more than 0.5 second.
Water shall be splashed if test switch is pressed before the water in the mould is completely frozen. Water shall be
supplied while the mould returns to the horizontal conditions after ice ejection. Therefore the problems of ice ejection,
leveling, and water supply can be checked by test switch. When test function performs normally, buzzer sounds and
water supply shall carry out. Check it for repair if buzzer does not sound.

4. When water supply is completed, normal cycle works: Ice Making → Ice Ejection → Level Return → Water Supply.

5. If ice maker stop switch is set to ON, normal cycle operates: Ice Making → Ice Ejection → Level Return → Water Supply.
If it is set to OFF, ice making conducts but ice ejection, level return, and water supply do not work.

- 79 -

CIRCUIT

3854JD1125A

(1) GR-L267BV(T)R

- 80 -

CIRCUIT

3854JD1125B

(2) GR-L267BV(T)RA

- 81 -

CIRCUIT

3854JD1125C

(3) GR-L267BV(T,S)PA

- 82 -

TROUBLE DIAGNOSIS

1. TroubleShooting

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start

1) No power at outlet.

2) No power on cord.

Bad connection between adapter and outlet. (faulty adapter)

The Inner diameter of adapter.
The distance between holes.
The distance between terminals.
The thickness of terminal.

Bad connection between plug and adapter (faulty plug).

The distance between pins.
Pin outer diameter.

3) Shorted start circuit.
No power on

power cord.

Disconnected copper wire.

Internal electrical short.

Faulty terminal contact.

Disconnected.

Weak connection.
Short inserted cord length.
Worn out tool blade.

Power cord is disconnected.

Faulty soldering.

Loose contact.

- Large distance between
male terminal.

- Thin female terminal.

Terminal disconnected.

Bad sleeve assembly.

* Measuring instrument:

Multi tester

■ Check the voltage.
If the voltage is within ±85%
of the rated voltage, it is OK.

■ Check the terminal
movement.

■

Check both terminals of
power cord.
Power conducts:OK.
No power conducts:NG

OLP is off.

No electric power on compressor. - Faulty compressor.

Faulty PTC.

4) During defrost.

Capacity of OLP is small.

Characteristics of OLP is bad.

Bad connection.

Power is
disconnected.

Power does not conduct. - Damage.

Bad characteristics. - Initial resistance is big.

Bad connection with
compressor.

Bad terminal connection.

Start automatic defrost.
Cycle was set at defrost when the refrigerator

was produced.

Inner Ni-Cr wire blows out.
Bad internal connection.
Faulty terminal caulking (Cu wire is cut).
Bad soldering.

Too loose.
Assembly is not possible.

■ Check both terminals of
OLP
If power conducts:OK.
If not:NG.

■ Check the resistance of both

terminals.
At normal temperature 6:
OK.
If disconnected:∞.

- 83 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

2. No cooling.

2) Refrigeration system is clogged.

Moisture
clogged.

No electric
power on
thermo­stat.

Weld joint
clogged.

Drier clogging.

Residual moisture

in the evaporator.

Residual moisture.

Insufficient drier
capacity.

Residual moisture
in pipes.

Moisture penetration - Leave it in the air. - Moisture penetration.
into the refrigeration oil.

Short pipe insert.

Pipe gaps.

Too much solder.

The capillary tube inserted depth. - Too much.

Capillary tube melts. - Over heat.

Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Too large.
Damaged pipes.

Air Blowing.

Leave it in the air.

Caps are missed.

Not dried in the compressor.
Elapsed more than 6 months after drying
Caps are missed.
No pressure when it is open.

Dry drier - Drier temperature.

Leave it in the air.

Caps are missed.

Air blowing.

Not performed.
Too short.
Impossible moisture

confirmation.
Low air pressure.

During rest time.

After work.

Check on package
condition.

Good storage after
finishing.

During transportation.
During work.

Not performed.
Performed.

Too short time.
Low air pressure.
Less dry air.

Desiccant powder.
Weld oxides.
Drier angle.

■ Heat a clogged evaporator to
check it. As soon as the
cracking sound starts, the
evaporator will begin to
freeze.

■ The evaporator does not cool

from the beginning
(no evidence of moisture
attached).
The evaporator is the same
as before even heat is
applied.

Foreign material clogging.

Compressor cap is disconnected.
Foreign materials are in the pipe.

- 84 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration
is weak.

1) Refrigerant Partly leaked.

2) Poor defrosting capacity.

Drain path (pipe) clogged.

Defrost heater does not
generate heat.

Weld joint leak.
Parts leak.

Inject adiabatics into drain
hose.

Foreign materials
penetration.

Cap drain is not disconnected.

Parts
disconnected.

Adiabatics lump input.
Damage by a screw or

clamp.
Other foreign materials input.

Plate
heater

Cord
heater

Inject through the
hole.

Seal with drain.

Wire is cut.

- Heating wire.

- Contact point
between heating
and electric wire.

Dent by fin evaporator.
Poor terminal contacts.

Wire is cut.

- Lead wire.

- Heating wire.

- Contact point
between heating and
electric wire.

Heating wire is corroded

- Water penetration.

Bad terminal connection.

■ Check visually.

■ Check terminal

Conduction: OK.
No conduction: NG.
If wire is not cut, refer to
resistance.
P=Power
V=Voltage
R=Resistance

2

V

P= —

R

2

V

R= —

P

- 85 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration
is weak.

Residual
frost.

No automatic defrosting.

Defrost does not return.

Weak heat from heater.

Too short defrosting time. Defrost Sensor.

Structural fault. Gasket gap.

Sheath Heater - rated.

Heater plate

Heater cord-L

- Faulty characteristics.

Seat-D (missing, location. thickness).

Air inflow through the fan motor.

Bad insulation of case door.

No contact to drain.
Loosened stopper cord.

Not touching the
evaporator pipe.

Location of assembly
(top and middle).

3) Cooling air leak.
Bad gasket adhestion

Door sag.

4) No cooling air circulation.

Faulty fan motor.

Bad adhesion.
Weak binding force at hinge.

Gap.
Bad attachment.
Contraction.

Fan motor.

Door switch.

Self locked.
Wire is cut.
Bad terminal contact.

Faults.

Refrigerator and freezer switch reversed.
Button is not pressed.

Contact distance.
Button pressure.
Melted contact.
Contact.

Poor door
attachment.
Door liner
(dimension).
Contraction inner
liner.
Misalignment.
Bad terminal
connection.
Adiabatics liquid
leak.

■ Check the fan motor
conduction: OK.
No conduction: NG.

- 86 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

3. Refrigeration
is weak.

4) No cooling air circulation.

Faulty fan motor.

Small cooling air
discharge.

5) Compressor capacity.

Fan is
constrained.

Insufficient
motor RPM

Faulty fan.

Shorud. Bent.

Ice and foreign materials on rotating parts.

Fan shroud contact. - Clearance.
Damping evaporator contact.
Accumulated residual frost.

Fan overload. - Fan misuse.
Bad low termperature RPM characteristics.
Rated power misuse.
Low voltage.

Fan misuse.
Bad shape.
Loose connection. - Not tightly connected.
Insert depth.

Rating misuse.
Small capacity.
Low valtage.

6) Refrigerant
too much or too little.

7) Continuous operation

- No contact of temperature controller. - Foreign materials.

8) Damper opens continuously.

Foreign materials
jammed.

Failed sensor. - Position of sensor.

Characteristics
of damper.

9) Food storing place. - Near the outlet of cooling air.

Malfunction of charging cylinder.
Wrong setting of refrigerant.
Insufficient compressor. - Faulty compressor.

Adiabatics liquid dump.
The EPS (styrofoam) drip tray has sediment in it.
A screw or other foreign material has fallen into the drip
tray or damper.

Bad characteristics of its own temperatue.
Parts misuse.
Charge of temperature - Impact.

characteristics.

■ Check visually after
disassembly.

■ Check visually after
disassembly.

- 87 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

4. Warm
refrigerator
compartment
temperature.

5. No automatic
operation.
(faulty

contacts)

1) Colgged cooling path.

Adiabatics liquid leak.
Foreign materials. –– Adiabatics dump liquid.

2) Food storate.

1) Faulty temperature sensor in freezer or refrigerator compartment.

Faulty contact.
Faulty temperature characteristics.

2) Refrigeration load is too much.

3) Poor insulation.

4) Bad radiation.

5) Refrigerant leak.

6) Inadequate of refrigerant.

7) Weak compressor discharging power.

8) Fan does not work.

9) Button is set at strong.

Store hot food.
Store too much at once.
Door open.
Packages block air flow.

Food.

Frequent opening and closing.
Cool air leak.
Poor door close. – Partly opens.

High ambient temperature.
Space is secluded.

Too much food.
Hot food.

Different rating.
Small capacity.

■ Inspect parts measurements
and check visually.

6. Condensation
and ice
formation.

1) Ice in freeezer compartment.
External air inflow. ––Bushing installed incorrectly.

Door opens
but not closes.

Gap around gasket. –– Contraction, distortion, loose, door twisted, corner not

Food vapor. –– Storing hot food. –– Unsealed food.

2) Condensation in the refrigerator compartment.
Door opens
but not closes.

Gasket gap.

3) Condensation on liner foam.
Cool air leak

and transmitted.

Weak door closing power.
Stopper malfunction.
Door sag.
Food hinders door closing.

fully inserted.

Insufficient closing.
Door sag.
Food hinders door closing.

Not fully filled.

Flange gap. –– Not sealed.
Gasket gap.

Top table part.
Out plate Ref/Lower part.

- 88 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

6. Condensation
and ice
formation.

4) Condensation on door.
Condensation on the duct door. - Duct door heater is cut.
Condensation on the

dispense recess.

Condensation on the Not fully filled. Surface.
door surface. Cormer.

Condensation
on the gasket
surface.

5) Water on the floor.
Condensation in the refrigerator compartment.
Defrosted water overflows. Clogged discharging hose.
Discharging hose Evaporation tray located at wrong place.
location.
Tray drip. Damaged.

Position of drain.

Recess Heater is cut.
Duct door is open. / Foreign material clogging.

Adiabatics liquid contraction.

Bad wing adhesion. Wing sag(lower part).

Door liner shape mismatch.

Corner. Too much notch.

Broken.

Home Bar heater is cut.

Breaks, holes.
Small Capacity.

Liquid shortage.
Liquid leak.

7. Sounds

1) Compressor compartment operating sounds.
Compressor sound Sound from machine itself.

inserted. Sound from vibration.

Restrainer.
Bushing Too hard.
seat. Distorted.

Aged.
Burnt.

Stopper. Bad Stopper Not fit

assembly. (inner

diameter

of stopper).
Tilted.
Not

Compressor base not connected.
Bad welding compressor stand(fallen).
Foreign materials in the compressor

compartment.

OLP

sound.

Capacitor noise.
Pipe sound. No vibration damper. Damping Bushing-Q.

Chattering
Insulation paper vibration.
Pipe contacts each other. – Narrow interval.

Capillary tube unattached.

sound.

Damping Bushing-S.

- 89 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

7. Sounds

1) Compressor compartment operating sounds.
Transformer

Drip tray vibration sound.

Back cover machine sound.

Condenser drain sound.

2) Freezer compartment sounds.
Fan motor sound.

Sounds from fan
contact.

Unbalance fan sounds.

sound.

Its own fault. –– Core gap.
Bad connection. –– Correct screw connection.

Bad assembly.
Distortion.
Foreign materials inside.

Bad connection.
Partly damaged.

Not connected.
Bad pipe caulking.

Normal operating sound.
Vibration sound.

Fan guide contact.
Shroud burr contact.
Damping evaporator contact.
Residual frost contact.

Unbalance.

Aged rubber seat.
Bad torque for assembling motor
bracket.

Damaged heater cord.
Narrow evaporator interval.

Surface machining conditions.
Fan distortion.
Misshappen.
Burr.

Ice on the fan. –– Air intake (opposite to motor

bushing assembly.)

Motor shaft
contact sounds.

Resonance.
Evaporator noise.

3) Bowls and bottles make contact on top shelf.

4) Refrigerator roof contact.

5) Refrigerator side contact.

6) Insufficient lubricants on door hinge.

Supporter disorted.
Tilted during motor assembly.

Evaporator pipe contact. –– No damping evaporator.
Sound from refrigerant. –– Stainless steel pipe shape in

Sound from fin evaporator and pipe during expansion
and contraction.

accumulator.

- 90 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

8. Faulty lamp
(freezer and

refrigerator
compartment).

9. Faulty internal
voltage (short).

1) Lamp problem. Filament blows out.
Glass is broken.

2) Bad lamp assembly. Not inserted.
Loosened by vibration.

3) Bad lamp socket.

Disconnection. Bad soldering.

Bad rivet contact.

Short. Water penetration. Low water

level in tray.

Bad elasticity of contact.
Bad contact(corrosion).

4) Door switch. Defective.

Refrigerator and freezer switches are reversed.
Travlel distance.
Bad connection.
Bad terminal contact.
Adiabatics liquid leak..

1) Lead wire is damaged.

Wire damage when assembling PTC Cover.
Outlet burr in the bottom plate.
Pressed by cord heater. lead wire, evaporator pipe.

2) Exposed terminal.

Compressor Compartment terminal. - Touching other

components.

Freezer compartment terminal. - Touching evaporator pipe.

3) Faulty parts.

Transformer. Coil contacts cover.

Welded terminal parts contact cover.
Compressor. Bad coil insulation.
Plate heater.
Melting fuse. Sealing is broken. Moisture penetration.
Cord heater. Pipe damaged. Moisture penetration.

Bad sealing.
Sheath heater.

■ Connect conduction and
non-conduction parts and
check with tester.
Conduction: NG.
Resistance∞: OK.

- 91 -

TROUBLE DIAGNOSIS

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

10. Structure,
appearance,
and others.

1) Door foam.
Sag.

Hinge loose

Weak gasket
adhesion.
Fixed tape.

Bolt is loosened during
transportation.
Not tightly fastened.
Screw worn out .
Adhesion surface.

Not well fixed.

Noise during
operation.

Malfunction.

2) Odor.
Temperature of

refrigerator
compartment.

Deodorizer.

Food Storage.

Others.

Hinge interference.

Not closed Interference between door liner and inner liner.
Refrigerator
compartment is
opened when freezer
compartment is
closed (faulty stopper).

High. Faulty damper control.

No deodorizer.
Poor capacity.

Seal condition.
Storage of fragrant foods.
Long term storage.

Odors from cleaners or items which shroud not
be stored in a refrigerator.

Bigger door foam.
Hinge-Pin tilted-Poor flatness.
No washer.
No grease.

Stopper worn out.
Bad freezer compartment door
assembly.
No stopper.

Button is set at weak.
Door is open (interference by
food).

- 92 -

-93-

2. Faults

2-1. Power

Problems Causes Checks Measures Remarks

No power on - Power cord cut. - Check the voltage with tester. -Replace the components.

outlet. - Faulty connector insertion. - Check visually. -Reconnect the connecting parts.

- Faulty connection between plug - Check visually. -Reconnect the connecting parts.

and adapter.

Fuse blows out. - Short circuit by wrong connection. - Check the fuse with tester - Find and remove the cause of - Replace with rated

- Low voltage products are or visually. problem (ex. short, high voltage, fuse after confirming

connected to high voltage. - Check the input volt are with tester low voltage). its specification.

- Short circuit by insects. (between power cord and products). - Replace with rated fuse.

- Electricity leakage. - Check the resistance of power cord ■ If fuse blowns out

- High voltage. with tester (if it is 0Ω, it is shorted). frequently, confirm

- Short circuit of components the cause and prevent.

(tracking due to moisture and dust

penetration).

2-2. Compressor

TROUBLE DIAGNOSIS

Problems Causes Checks Measures Remarks

Compressor - Faulty PTC. - Check the resistance. - If resistance is infinite, replace it

does not Vlaue:∞ is defective. with new one.

operate. - If it is not infinite, it is normal.

- Check other parts.

- Compressor is frozen. - If compressor assembly parts are - During forced operation:

normal (capacitor, PTC, OLP), - Operates: Check other parts.

apply power directly to the - Not operate: Replace the frozen

compressor to force operation. compressor with new one, weld,

Auxiliary winding

Main winding

Power

OLP It starts as soon as it is • Refer to weld repair procedures.

contacted.

evacuate, and recharge refrigerant.

-94-

2-3. Temperature

Problems Causes Checks Measures Remarks

High Poor cool air circulation due to faulty - Lock –– Check resistance with a - Replace fan motor.

temperature fan motor. tester.

in the freezer 0Ω: short.

compartment. ∞Ω: cut. - Reconnect and reinsert.

- Rotate rotor manually and check

rotation.

- Wire is cut.

- Bad terminal contact: Check - Maintain clearance and remove ice

terminal visually. (Repair and/or replace shroud if fan

- Fan constraint. – Fan shroud is constrained by shroud

contact: Confirm deformation).

visually.

– Fan icing:

Confirm visually.

Faulty fan motor due to faulty door - Iced button (faulty) operation: - Confirm icing causes and repair.

switch operation. Press button to check - Replace door switch.

- Faulty button pressure and contact:

Press button to check operation.

- Door cannot press door switch - Door sag: fix door.

button: Check visually. - Door liner bent:replace door or

attach sheets.

TROUBLE DIAGNOSIS

Bad radiation conditions in - Check the clearance between the - Keep clearance between - The fan may be

compressor compartment. refrigerator and wall (50 mm in refrigerator and walls (minimum broken if cleaning

minimum). 50mm). performs while the

- Check dust on the grill in - Remove dust and contaminants refrigerator is on.

compressor compartment. from grill for easy heat radiation.

- Check dust on the condenser coils. - Remove the dust with vacuum

cleaner from the coils condenser

while the refrigerator is off.

2-4. Cooling

Problems Causes Checks Measures Remarks

TROUBLE DIAGNOSIS

-95-

High Refrigerant leak. Check sequence

temperature 1. Check the welded parts of the refrigerant.

in the freezer drier inlet and outlet and drier

compartment. auxiliary in the compressor

compartment (high pressure side).

2. Check the end of compressor

sealing pipe (low pressure side).

3. Check silver soldered parts.

(Cu + Fe / Fe + Fe).

4. Check bending area of wire

condenser pipe in compressor

compartment (cracks can

happen during bending).

5. Check other parts (compressor

compartment and evaporators in

freezer compartment).

Shortage of refrigerant. Check frost formation on the surface - Find out the leaking area, repair, Drier must be replaced.

of evaporator in the freezer evacuate, and recharge the

compartment. refrigerant.

- If the frost forms evenly on the - No leaking, remove the remaining

surface, it is OK. refrigerant, and recharge new

- If it does not, it is not good. refrigerant.

Weld the leaking part, recharge the Drier must be replaced.

-96-

TROUBLE DIAGNOSIS

Problems Causes Checks Measures Remarks

High Cycle pipe is clogged. Check sequence. - Heat up compressor discharging Direr must be replaced.

temperature in 1. Check temperature of condenser weld joints with touch, disconnect

the freezer manually. the pipes, and check the clogging.

compartment. If it is warm, OK. Remove the causes of clogging,

If it is not, compressor discharging weld, evacuate, and recharge

joints might be clogged. the refrigerant.

2. Manually check whether hot line - If it's warm, OK. If it's not,

pipe is warm. condenser discharging line weld

If it is warm, OK. joints might be clogged.

If it is not, condenser outlet weld Disconnect with torch, remove the

joints might be colgged. causes, evacuate, and recharge

seal refrigerant.

Leak at loop pipe weld joint Check sequence. Replace the compressor, weld, Drier must be replaced.

(discharge) in compressor. 1. Manually check whether evacuate, and recharge refrigerant.

condenser is warm, It is not warm

and the frost forms partly on the

evaporator in the freezer

compartment.

Faulty cooling fan in the compressor Check sequence. - Replace if motor does not operate.

compartment. 1. Check cooling fan operation. - If fan is disconnected, check fan

2. Check that cooling fan is damage and reassemble it.

disconnected from the motor. ■ Refer to fan motor disassembly

and assembly sequence.

-97-

2-5. Defrosting failure

Problems Causes Checks Measures Remarks

No defrosting. Heater does not generate heat as 1. Check the resistance of heater. Heating wire is short and wire is cut. Seal the lead wire with

the heating wire is cut or the circuit 0Ω: Short. ∞Ω: Cut. • Parts replacement: Refer to parts insulation tape and heat

is shorted. Tens to thousands Ω: OK. explanations. shrink tube if the cut

1) Heating wire is damaged when 2. Check the resistance between lead wire is accessible to

inserting into the evaporator. housing terminal and heater repair.

2) Lead wire of heater is cut. surface.

3) Heating wire at lead wire contacts 0Ω: Short. ∞Ω: Cut.

is cut. Tens to thousands Ω: Short.

Suction tube and discharge orifice: 1. Confirm foreign materials. In case 1) Push out impurities by inserting

1. Impurities. of ice, insert the copper line copper wire. (Turn off more than

2. Ice. through the hole to check. 3 hours and pour in hot water if

2. Put hot water into the drain frost is severe.)

(check drains outside). 2) Put in hot water to melt down frost.

3) Check the water outlet.

4) Push the heater plate to suction

duct manually and assemble the

disconnected parts.

Gap between Suction duct and 1. Confirm in the Suction duct. 1) Turn off the power, confirm

Heater plate (Ice in the gap). impurities and ice in the gap, and

supply hot water until the ice in the

gap melts down.

2) Push the Heater plate to drain

bottom with hand and assemble

the disconnected parts.

Wrong heater rating (or wrong 1. Check heater label. Faults:replace.

assembly). 2. Confirm the capacity after - How to replace :

substituting the resistance value Refer to main parts.

into the formula.

2

V

P= ––

(V: Rated voltage of user country)

R

(R: Resistance of tester[Ω])

Compare P and lavel capacity.

Tolerance: ±7%

TROUBLE DIAGNOSIS

-98-

Problems Causes Checks Measures Remarks

No defrosting Melting fuse blows. - Check melting fuse with tester. - Faullty parts: parts replacement.

1) Lead wire is cut. If 0Ω: OK. - Check wire color when maeasuring

2) Bad soldering. If ∞Ω: wire is cut. resistance with a tester.

Ice in the Suction duct. 1. Check the inner duct with mirror. 1) Turn power off.

1) Icing by foreign materials in the 2) Raise the front side (door side),

duct. support the front side legs, and let

2) Icing by cool air inflow through the ice melt naturally. (If power is

the gap of heater plate. on, melt the frost by forced

3) Icing by the gap of heater plate. defrosting.)

2. Check by inserting soft copper 3) Reassemble the heater plate.

wire into the duct (soft and thin

copper not to impair heating wire).

Bad cool air inflow and discharge, 1. Turn on power, open or close the 1) Check the faulty connector of

and bad defrosting due to faulty door, check that motor fan housing and reassemble wrongly

contact and insertion (bad connector operates (If it operates, motor fan assembled parts.

insertion into housing of heater, is OK). 2) If the parts are damaged,

melting, fuse, and motor fan). 2. Disconnect parts in the refrigerator remove the parts and replace it

compartment, check the connection

around the housing visually,

defrost, and confirm heat generation

on the heater. Do not put hands on

the sheath heater.

3. Check the parts which have faults

described in 1 & 2 (mechanical

model: disconnect thermostat

from the assembly).

with a new one.

TROUBLE DIAGNOSIS

-99-

2-6. Icing

Problems Causes Checks Measures Remarks

Icing in the 1) Bad circulation of cool air. - Check the food is stored properly - Be acquainted with how to use. - Check the defrost

refrigerator - Clogged intake port in the (check discharge and intake port - Sealing on connecting parts. related parts if problem

compartment. refrigerator compartment. are clogged). - Check the damper and replace is caused by faulty

- Damper icing. - Sealing is not good. - Check icing on the surface of it if it has defects. defrosting.

- Pipe icing. - Too much food is stored and clogs baffle and cool air path (pipe) after - Check defrost. (After forced

- Discharging the discharge port. dissembling the container box. defrosting, check ice in the

pipe icing. - Bad defrosting. - Check icing at intake ports of evaporator and pipes.)

freezer and refrigerator

compartment.

2) Faulty door or refrigerator - Check gasket attached conditions. - Correct the gasket attachment - Replacement should

compartment. - Check door assembly conditions. conditions and replace it. be done when it

- Faulty gasket. - Door assembly and replacement. cannot be repaired.

- Faulty assembly.

3) Overcooling in the refrigerator - Check refrigerator compartment - Replace faulty parts.

compartment. is overcooled (when button

- Faulty damper in the refrigerator pressed on weak).

compartment. - Check parts are faulty.

- Faulty MICOM (faulty sensor)

TROUBLE DIAGNOSIS

4) Bad defrosting - Check frost on the evaporator - Check parts related to defrosting. - Moisture does not freeze

- Heater wire is cut. after dissembling shroud and fan - Check defrosting. (Check ice on the on the evaporator but

- Defective defrost sensor. grille. evaporator and pipe.) can be sucked into the

- Defrosing cycle. - Check ice on intake port of freezer refrigerator, where it

and refrigerator compartment. condenses and freezes.

This interferes with cold

air circulation and

sublimation of the ice.

5) Customers are not familiar with - Check food interferes with door - Be acquainted with how to use.

this machine. closing.

- Door opens. - Check ice on the ceilings.

- High temperature, high moisture,

and high load.

Problems Causes Checks Measures Remarks

Ice in the freezer 1) Bad cooling air circulation. - Check food storage conditions - Be acquainted with how to use. - Check the parts related

compartment. - Intake port is clogged in the freezer visually.(Check clogging at intake - Check defrost (Check ice on the to defrosting if the

- Surface of fan compartment. and discharging port of cooling air.) evaporator and pipes after forced problem is caused by

grille. - Discharging port is Clogged. - Check food occupation ratio in defrosting). the faulty defrosting.

- Wall of freezer - Too much food is stored. volume (Less than 75%).

compartment. - Bad defrosting. - Check frost on the evaporator after

- Cool air dissembling shroud and fan grille.

discharging port.

- Basket(rack) refrigerator compartment.

area.

- Food surface. 2) Bad freezer compartment door - Check gasket attachment - Correct the gasket attachement - Replace when it can not

- Icing in the - Faulty gasket conditions. conditions and replace it. be repaired.

shute. - Faulty assembly - Check door assembly conditions. - Door assembly and replacement.

- Check icing at intake port of

TROUBLE DIAGNOSIS

- 100 -

3) Over freezing in the freezer - Refrigerator operates pull down. -Replace defective parts.

compartment. (Check if it is operated

- Faulty MICOM. intermittently)

- The Temperature of freezer

compartment is satisfactory, but

over freezing happens in the

refrigerator compartment even

though the notch is set at weak.

4) Bad defrosting. - Check frost on the evaporator after - Check parts related to defrosting.

- Heater wire is cut. dissembling shroud and grille. - Check defrosting. Check ice on the

- Faulty defrost sensor. - Check ice on the intake port in the evaporator and pipes after forced

- Defrosting cycle refrigerator compartment. defrosting.

5) User is not familiar with how to - Check food holds door open. - Be acquainted with how to use.

use. - Check ice on the ice tray.

- Door opens.

- High moisture food water is stored.