LSC26905xx LG 26 Cu. Ft. Side by Side Refrigerator Service Manual

7/21/2019 LSC26905xx LG 26 Cu. Ft. Side by Side Refrigerator Service Manual

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CAUTIONPLEASE READ THE SAFETY PRECAUTIONS OF THIS MANUAL CAREFULLY

BEFORE REPAIRING OR OPERATING THE REFRIGERATOR

REFRIGERATORSERVICE MANUAL

MODEL: LSC26905TT

COLOR: STAINLESSWESTERN BLACKSTAINLESSTITANIUMNEO TITANIUM

http://biz.lgservice.com



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

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

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

HOW TO INSTALL THE REFRIGERATOR .......................................................................................................................... 11

HOW TO ADJUST THE DOOR HEIGHT............................................................................................................................ 11

FILTER ............................................................................................................................................................................... 12

HOW TO CONTROL THE ICEMAKER WATER SUPPLY.................................................................................................. 14

MICOM FUNCTION .............................................................................................................................................................. 16

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

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

PWB PARTS DIAGRAM AND LIST.....................................................................................................................................59

PWB CIRCUIT DIAGRAM...................................................................................................................................................79

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR ............................................................................ 87

WORKING PRINCIPLES.................................................................................................................................................... 87FUNCTION OF ICEMAKER ............................................................................................................................................... 88

ICEMAKER TROUBLESHOOTING.................................................................................................................................... 91

ICEMAKER CIRCUIT ..........................................................................................................................................................92

CIRCUIT................................................................................................................................................................................ 94

TROUBLE DIAGNOSIS........................................................................................................................................................ 98

TROUBLESHOOTING ....................................................................................................................................................... 98

FAULTS ............................................................................................................................................................................ 108

SEALED SYSTEM REPAIR ............................................................................................................................................. 125

HOW TO DEAL WITH CLAIMS........................................................................................................................................ 132

HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................... 137

DOOR............................................................................................................................................................................... 137

HANDLE ........................................................................................................................................................................... 138

FAN SHROUD GRILLE .................................................................................................................................................... 139

ICEMAKER ASSEMBLY................................................................................................................................................... 139

WATER-VALVE DISASSEMBLY METHOD...................................................................................................................... 140

FAN AND FAN MOTOR DISASSEMBLY METHOD......................................................................................................... 140

DISPENSER..................................................................................................................................................................... 141

EXPLODED VIEW .............................................................................................................................................................. 143

REPLACEMENT PARTS LIST ........................................................................................................................................... 166

CONTENTS

- 2 -



Please observe the following safety precautions to use the

refrigerator safely and correctly and to prevent accident or

injury when servicing.

1. Be careful of an electric shock. Disconnect power cordfrom 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, wait for more than five

minutes after power cord was disconnected from the

wall outlet.

3. Check if the power plug or card is pinched between the

refrigerator and the wall. If the cord is damaged, it could

cause fire or electrie shock.

4. If the wall outlet is overloaded, it may cause a fire. Use a

dedicated circuit for the refrigerator.

5. Be sure the outlet is grounded, This is particularly

important in wet or damp areas.

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 withinsulation 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 therefrigerator.

13. Do not put anything on top of the refrigerator,

especially something containing water, like a vase.

14. Do not put glass bottles full of water into the freezer.

The contents will freeze and break the glass period.

15. When you scrap or discard the refrigerator, remove the

doors and dispose of it where children are not likely to

play in or around it.

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -



SPECIFICATIONS

- 6 -

ITEMS SPECIFICATIONS

DIMENSIONS 908 X 896 X 1771 mm

W X D X H (3511 / 16X355 / 16X6911 / 16 in.)

NET WEIGHT 130 kg (286.6 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) (61 / 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 (2 EA)

DISPENSER LAMP 15W (1 EA)

7 2 4 m m ( 2

8 1 / 2 i n . )

1004 mm (391 / 2 in.)

908 mm (3911 / 16 in.)

7 7 9 m m ( 3

0 5 / 8 i n . )

8 2 9 m m ( 3

2 5 / 8 i n . )

8 9 2 m m ( 3

5 1 / 8 i n . )

1 2 6 1 m m ( 4

9 5 / 8 i n . )

1 7

4 1 . 5 m m ( 6

8 1 / 2 i n . )

1 7

4 6 . 5 m m ( 6

8 3 / 4 i n . )

1 7 7 1 m m ( 6

9 1 1 / 1 6 i n . )

1 7 7 1 m m ( 6

9 1 1 / 1 6 i n . )

Front View Top View

3. Ref No. :LSC26905TT (Refer to appendix)



4. Ref No. : LSC26905TT (Refer to appendix)

PARTS IDENTIFICATION

- 10 -

Display Frame

Dispenser Lamp

Ice & Water

Dispenser Button

PWB Cover

Water Tubes

Lamp

Shelf

Snack Drawer

Vegetable Drawer

Vegetable Drawer

Door Rack

Shelf

Door Rack

Lamp

Lower Cover

Dairy Product Corner

Door Rack

Door Rack

Drawer

(Plastic)

Freezer

Compartment

Refrigerator

Compartment

Automatic

Icemaker

Door Rack

Shelf

Door Rack

Water Filter



1. How to adjust the Refrigerator Door Height

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.

HOW TO INSTALL THE REFRIGERATOR

- 11 -



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.

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.

2. Replace with a new cartridge.

Take the new cartridge out of its packaging and remove the

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

feel and hear the snap when it clicks into place.

Using the handle, twist the cartridge clockwise about 1/4

turn.

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.lgeus.com or call 1-800 -243-000.

FITER ASSEMBLY, WATER


- 12 -

LG MDL PART NO MAKER

GR-L267BV(T)R

GR-L267BV(T)RA 5231JA2006A CUNO

GR-L267BS(T,S)PA

GR-L267BNRY 5231JA2002A CUNO



Install Water Filter (Applicable to some models only)

Before Installing Water Filter

1. Before installing the filter, take out the top shelf of the

refrigerator after tilting it to the direction and lifting it

to the direction and move it to the lower part.2. Remove the lamp cover by pressing the protrusion

under the cover and pulling the cover to the front.

Installing water filter

1. Initial installation of water filter

Remove the filter substitute cap by turning it

counterclockwise by 90 degrees and pulling it down.

Note : Keep the cap safe to use it later when you do not

use the filter.

Remove the red cap from the filter and attach the

sticker. Insert the upper part of the filter after aligning

with the guideline marked on the control box, and fasten

it by turning it clockwise by 90 degrees.

Note : Check that the guideline and the fastening

indication line are aligned.

2. Replacement of water filter

While holding the lower part of the filter, turn it

counterclockwise by 90 degrees and pull it down.

Note : Check that the guideline and the loosening

indication line are aligned.

After installing water filter

Reassemble the lamp cover and the top shelf of the

refrigerator. To place the top shelf of the refrigerator, raise

the front part of the shelf a bit so that the hook of the shelf

is fits into the groove.

To purge the water filter system, let the water run for at

least 3 minutes.

NOTE : Open the refrigerator and check for water droplets

on the shelf under the filter.


Control Box

Aligning with the guide lineand the fastening indication line

Control Box

Aligning with the guide line

and the loosening indication line

Separationof Red Cap

Sticker

SubstituteCap

- 13 -



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. Trun on the electricity after connecting water pipe.

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

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

3) The water is supplied into the tray two or three times. The amount is smal each time.

Put a container under the ice tray and press test switch.

4) When the ice tray rotates, the water in it will spill. Collect the spilled water and discard it.

5) When ice tray has finished rotation, water comes out the water tube. Check the amount that goes into the ice tray. (Refer

to the drawing below. The optimum amount is 110cc.(almost 4 oz.))

* It is acceptable is the adjusted water level is less than the optimum level.


- 14 -

21

Test Switch

Confirm the amount

of water

Icemaker

Too much

Too little

Optimum level



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

Caution : • Unplug the power cord from the wall outlet and wait at least three minutes before removing the main PWB

cover. 310 Volts are present in the control panel.

1. Disconnect PWB cover from the upper part of the refrigerator.2. Adjust the amount of water supplied by using the DIP

switches.

Water Supplying Time Control Option

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 the ice cubes are too small, increase the water supplying time. This happens when too little water is supplied into the ice tray.

4) If the ice cubes stick togther, 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 the adjustment of the control switch for the amount of water supplied is complete, check the level of water in the ice


- 15 -

(+) Driver

1

ONSwitch ON

Switch OFF 2 3

Confirm the amount

of water

Optimum level

* The quantity of water

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)

* DIP switch is on the main

PWB.

GR-L267BV(T)R(Refer to an appendix)

GR-L267BNRY

GR-L267BV(T)RA(Refer to an appendix)

GR-L267BV(T,S)PA

NoDIP SWITCH SETTING

S1 S2

DIP SWITCH SETTING

S1 S2 S3

1

2

3

4

5

6

7

8

OFF OFF 6.5 SEC

ON OFF 5.5 SEC

OFF ON 7.5 SEC

ON ON 8.5 SEC

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

WATERSUPPLY TIME

WATERSUPPLY TIME

REMARKS



1. Monitor Panel

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

1-2. GR-L267BV(T)R (Refer to appendix)

1-3. GR-L267BNRY (Refer to an appendix)

MICOM FUNCTION

- 16 -

EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR F ILTER/LIGHT LOCK

Dispenser SelectionButton

Express Freezer/Jet FreezerFunction Selection Button

Dispenser and ButtonLock Button

Dispenser Lamp On/Off Button/Filter Status Display RESET Button

Temperature Adjustment ButtonFor Refrigerator Compartment

Temperature Adjustment Buttonfor Freezer Compartment

EXPRESSFRZ

(EXPRESS)

ON(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

FWATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP

FILTER RESETHOLD 3SECS

FILTER

EXPRESS DISPENSER FREEZER REFRIGERATOR FILTER RESET/LIGHT LOCK

EXPRESSFRZ

ON

CUBE

LOCK

DISPENSER

BUTTON

WATER

CRUSH

3 SECS

DIGITAL CONTROL

FRZ TEMP REF TEMP

COLDEST

COLD


FILTER



1-4. 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

Power Save Mode puts the display into standby mode until the door is opened.

To put the display into Power Save Mode, press and hold the FREEZER and EXPRESS FRZ buttons simultaneously for 5seconds until the Ding~ sounds. (Use both buttons for this towork.) When Power Save Mode is activated, the display

remains OFF unless a door is opened or a button is pressed. The display will return to the OFF position after 30 seconds'

inactivity.

To remove the display from Power Save Mode, press and hold the FREEZER and EXPRESS FRZ buttons

simultaneously for 5 seconds until the Ding~ sounds. The Power Save Mode default setting is OFF after a power

interruption.

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 with Demo Mode

Demo mode is available for displaying the refrigerator in a sales setting or similar condition.It allows the display, dispenser, lights, and fan to operate without running the compressor.

To enter the DEMO mode, press and hold the REFRIGERATOR and EXPRESS FRZ buttons simultaneously for 5

seconds until the Ding~ sounds.

To exit the DEMO mode and return to normal operation, press and hold the REFRIGERATOR and XPRESS FRZ buttons

simultaneously for 5 seconds until the Ding~ sounds again.

The refrigerator will default to the NORMAL mode (DEMO mode OFF) if the power fails.

MICOM FUNCTION

- 17 -

EXPRESS/JET FRZ DISPENSER FREEZER REFRIGERATOR F ILTER/LIGHT LOCK

Display PowerSaving Mode

Exhibition Mode

EXPRESSFRZ

(EXPRESS)

ON(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

FWATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP


FILTER

Change Display Degree fromFahrenheit to Centigrade Mode

Buzzer muteMode



2. Description of Function

2-1-1. Function of Temperature Selection

* The temperature can vary ±3°C (26.6 °F ~ 37.4 °F) depending on the load condition.

Press the button to cycle through the settings in this order: (Medium) (Medium High) (High) (Low)

(Medium Low).

• The temperature displayed is the SET temperature, NOT the actual temperature inside the refrigerator. The actual

temperature varies, depending upon the temperature of items put into the refrigerator and other variables.

• It takes the refrigerator a while to get down to the set temperature from the initial power- on. Wait at least 24 hours after

initial power- up to put food into the refrigerator. If the temperature is unsatisfactory, adjust it and wait 24 hours. It may

take three or four days to get the adjustment to your satisfaction.• The freezer is automatically set to MEDIUM HIGH if the icemaker is set to ON.

2-1-2. Outside temperature display function

1. The ambient temperature sensor is located under the upper right hinge cover. This sensor reads the temperature of the

room and displays it in the upper right corner of the display.

2. The ambient temperature is displayed between 16 °F and 120 °F.Outside of that range, the display willshow Er.

3. Since the ambient temperature sensor is located at the hinge, its reading may differ from other thermometers in the room.

MICOM FUNCTION

- 18 -

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

Setting

temperature

Temperature

ControlMedium Medium High High Low Medium Low

Freezer Control -2 °F -5 °F -8 °F 7 °F 1 °F

Refrigeration37 °F 34 °F 32 °F 46 °F 41 °F

Control

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1

5

4

3

2

1



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.

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 3 SECONDS 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 3 SECONDS text turn off with reset status.

MICOM FUNCTION

- 19 -

LOCK

DISPENSER & BUTTON

3 SECSLOCK

DISPENSER & BUTTON

3 SECS

LOCK CONTROL

Ex) SelectLOCK

Ex) SelectLOCK again

Ex) Select

LOCK

Ex) Select

LOCK again

In initial Power On / Filter RESET

Replace indicatorlight onClassification

Filter StatusDisplay


FILTER


FILTER

In initial Power On / Filter RESET

Replace indicatorlight onClassification

Filter StatusDisplay

LED LED(GR-L267BNRY)

LED(GR-L267BNRY)



2-2. Dispenser use selection

You can select water or ice.

Please select water, cruched ice, and cubed ice by pressing the button

as you desire.

Use your cup to press lightly on the actuator.• Each graphic is indicated for the selected function.

• You’ll hear a CLICK when the ice door closes 5 seconds after ice is

dispensed.

REFERENCE : Hold your cup in the dispenser for a few seconds after

dispensing ice or water to catch the last few drops or pieces of

ice.

2-3. Express Freezing/JET Freezing Selection

Select this function to expedite freezing.

• Press the button to cycle to toggle between the settings.• 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 turns the dispenser light 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 period.

MICOM FUNCTION

- 20 -

DISPENSER

LED LED(GR-L267BNRY)

CUBE

WATER

CRUSH

PressingSwitch

LED (GR-L267BV(T,S)PA) (Refer to an appendix)

LED (GR-L267BNRY)(Refer to an appendix)

LED (GR-L267BV(T)R, GR-L267BV(T)RA)(Refer to an appendix)

EXPRESS/JET FRZ

EXPRESS/JET FRZ EXPRESSFRZ

EXPRESS EXPRESS EXPRESS

ON

EXPRESSFRZ

ON

JET JET JET

Dispenser IightON/OFF LED

DISPENSER



2-5. Express freezing

1. Express freezing increases the cooling speed in the freezer by running the fan and the compressor simultaneously.

2. Express freezing is released if the power fails and is restored.

3. The temperature setting is not changed when Express Freeze is selected.

4. You can change the temperature in the freezer and the refrigerator even if Express Freeze has been selected and is inprogress.

5. The refrigerator operates independently of the Express Freeze setting and operation.

6. At the end of the Express Freeze cycle, the freezer defaults to its original setting.

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 Freezer fan motor operates at the high speed of RPM during operation of Express freezing.

2-6. Jet Freezing (GR-L267BV(T,S)PA (Refer to appendix)

1. Jet Freeze increases the cooling speed in the Jet Freeze area of the freezer by running both the compressor and the Jet

Freeze Box fan.

2. Jet freezing is released if the power fails and is restored.

3. The set temperature display is not changed by selecting Jet Freeze.

4. If Jet Freeze is selected,the compressor and the freezer fan will both operate.

The refrigerator temperature will drop and the Jet Freeze box motor will run for a maximum of 2 hours

After that, Jet Freeze is released and the freezer defaults to its original setting.

5. To keep the Jet Freeze fan motor from becoming ice- bound, the controller spins it up for 10 seconds every hour.

6. The Jet Freeze fan motor will not be detected as a failure because it is a 12 V DC motor.

7. The Jet Freeze fan motor will run for one minute if the freezer adjust button is pressed and held for over 1 second.

MICOM FUNCTION

- 21 -



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

1. The OptiChill is positioned at the bottom of fresh food room separately and allow the 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 atemperature adjusting display at the top of it.

3. When OptiChill is turned on, it defaults to FRUIT VEGE. If only the refrigerator door is opened, the OptiChill LED will be

ON.

4. Each consecutive press of the SELECT button cycles through the options in this order and shows a target temperature:

FRUIT VEGE (39°F) CHILED ROOM (30°F) PARTIAL FREEZING (27°F) FRUIT VEGE (39°F).

5. The OptiChill temperature is read by the MICOM. The MICOM will close and open the damper based upon the

temperature.

6. To keep the OptiChill damper from becoming ice- bound, the controller opens and/ or closes it every hour.

MICOM FUNCTION

- 22 -

°F / SET TEMP

/ TIME REMAININGMINFRUITVEGE

CHILEDROOM

PARTIALFREEZING

SELECT

HR

Display 27°F 30°F 39°F

NOTCHPartial

Freezing

Chilled

Room

Fruit

VEGE



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 fails 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). (Except GR-L267BNRY)

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 freezer / refrigerator or home bar opened.

2. After the door has been open for one minute, the buzzer sounds for 1/2 second and then sounds three times every 30

seconds.

3. If all doors are closed when the alarm sounds, it is cancelled immediately.

2-11. Ringing of button selection buzzer

1. The ding~ will sound whenever a button is pressed.

MICOM FUNCTION

- 23 -

Doors of freezing/cold storage room

or home bar

BUZZER

Closing Opening

Within1 minute

1 minute 30

seconds

30

seconds

30

seconds

OpeningClosing Closing

3 Times 3 Times 3 Times 3 Times



2-12. Ringing of compulsory operation, compulsory frost removal buzzer

1. If pressing the test button in the Main PCB, a beep will sound.

2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 2/10 second and Off for

1 8/10 second three times.

3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 2/10 second , Off for

2/10 second, On for 2/10 second and Off for 1 4/10 second three times.

2-13. Defrost function

1. Defrost is performed whenever total operation time of compressor becomes 7 ~ 7 1/2 hour.

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

becomes 4 ~ 4 1/2 hour.

3. Defrost is completed if temperature of a defrost sensor becomes more than 5°C after starting defrost. The defrost cycle

will fail if there frigerator does not reach a temperature of 5°C (9 °F)two hours into the defrost cycle.

4. The defrost cycle will not operate of the defrost sensor fails, arcs, or shorts out.

2-14. Refrigerator lamp automatically off• Refrigerator lamp turns on and off by refrigerator door switch.

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

MICOM FUNCTION

- 24 -



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

operated sequentially as follows to prevent noise and part damage due to simultaneous operation of several parts in

applying initial power and completing test.

MICOM FUNCTION

- 25 -

Function Load Operation Sequence Remark

I n a p pl y i n

gI ni t i al p ow er

T E S T M ODE

When temperature

of a frost removalsensor becomesmore than 45°C(113°F) (In purchase,movement)

If error occursduring operation,initial operation isnot done.

Sequence of

load operationwhen closingFreezer andRefrigerator.

If pressing switchonce more in thetest mode 2 ortemperature of afrost removalsensor is morethan 45°C (113°F),it immediatelyreturns to the testmode for initialoperation(COMP operatesafter 7 minutes).

When

temperature of a

frost removal

sensor becomesless than 45°C

(113°F) (In power

failure, service)

Test mode 1

(Compulsory

function)

Test mode 2

(Compulsory frost

removal)

POWER

ON

COMP

ON

F-FAN&

C-FANON

R-STEPMOTOR

DAMPERON

OPTICHILLSTEP

DAMPERMOTOR

ON

FROSTREMOVAL

HEATER

OFF

FROSTREMOVAL

HEATER

ON

DAMPER&

DUCT DOOR&OPTICHILLHEATER ON

DAMPER&

DUCT DOOR&OPTICHILLHEATER OFF

0.3sec.

6.0sec.

0.3sec.

0.3sec.

0.3

sec.

POWER

ON

0.3sec.

PIPE&

DISP'HEATER

OFF

0.3sec. COMP

ON

0.3sec. F-FAN

&C-FAN

ON

0.3sec. R-STEP

MOTORDAMPER

ON

0.3sec.

OPTICHILLSTEP

DAMPERMOTOR

ON

PIPE&

DISP'HEATER

ON

TESTSWITCH(PRESSOnce)

OTHER

LOADOFF

COMP

ON

F-FAN&

C-FANON

R-STEPMOTOR

DAMPERON

OPTICHILL

STEP

DAMPERMOTOR

CLOSE

TESTSWITCH(PRESS2 Times)

COMP

OFF

F-FAN&

C-FANOFF

FROSTREMOVALHEATER

ON

R-STEPMOTOR

DAMPERCLOSE

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.

0.3sec.



2-16. Failure Diagnosis Function

1. Failure diagnosis function is to facilitate service when a failure occurs and produces an error code.

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 displaygraphics other than a failure code are turned off.

(1) GR-L267BV(T)R Model (Refer to appendix)

MICOM FUNCTION

- 26 -

EXPRESSFRZ

ON

CUBE

LOCK

DISPENSER

BUTTON

WATER

CRUSH

3 SECS

DIGITAL CONTROL

FRZ TEMP REF TEMP

COLDEST

COLD


FILTER

C E F DG

FRZTEMP

Trouble Code

Index

Trouble Code

F4

F3

F2

F1

1

2

3

4

5

6

7

8

9

10

11

Normal display(Note 1)




Normal display

(Note 1)

Trouble Code Index

F1 F2 F3 F4

No. Item Contents of failure FreezingBLDC motor

CompressorStepping

motor damperDefrostHeater

CoolingBLDC motor

Product operation status in failure

Abnormalfreezer sensor

Abnormal refrigeratorsensor 1 (R1)(Upper part in therefrigeratorcompartment)


Abnormal defrostsensor

Failed defrosting

Abnormal freezingBLDC motor

Abnormal coolingBLDC motor

Abnormalambient sensor

Abnormalicemaker sensor

Abnormalicemaker unit

Abnormal W/Tsensor

Freezer sensor short circuit

Refrigerator sensor1 short circuit


Abnormal short circuit

Defrost heater, temperature fuse shortcircuit, unplugged connector(indicated4 hour later after trouble)

Motor defect, hooked of lead wireto fan, contact of structures withfan, short or open of leadwire(there is no signal of BLDCmotor more than 115 seconds in

operation of fan motor)Ambient sensor short circuit

Icemaker sensor short circuit

Faulty icemaker unit morot or hallic, lead wire short circuit, faultymotor driving circuit

Water Tank sensor short circuit

StandardRPM

StandardRPM

StandardRPM

StandardRPM

StandardRPM

OFF

StandardRPM

OFF

ON for 15minutes / OFF for 15minutes

No defrost

Full opening for10 minutes/

Full closing for15 minutes

: On l : Off ˇ : Normal



(2) GR-L267BV(T)RA, GR-L267BV(T,S)PA (Refer to appendix)

MICOM FUNCTION

- 27 -

Failure Code Indication Part

EXPRESSFRZ

(EXPRESS)

ON

(JET)

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

FWATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP


FILTER

C F A BE D

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Er FS

Er rS


Er dS

Er dH

Er FF

Er CF

Er CO







Failure code indication part

Freezer room

notch temperaturedisplay

Refrigerator room

notch temperaturedisplay

No. Item Contents of failure Freezing

BLDC motorCompressor

Stepping

motor damper

Defrost

Heater

Cooling

BLDC motor

Product operation status in failure

Abnormalfreezer sensor


Abnormal refrigeratorsensor 2 (R2)(Middle part in therefrigeratorcompartment)

Abnormal defrostsensor

Failed defrosting

Abnormal freezingBLDC motor

Abnormal coolingBLDC motor

Abnormalcommunication

Abnormalambient sensor

AbnormalOptichill sensor

Abnormalicemaker sensor

Abnormalicemaker unit

AbnormalW/T sensor

AbnormalDrive MicomCommunication

Freezer sensor short circuit



Abnormal short circuit

Defrost heater, temperature fuse shortcircuit, unplugged connector(indicated4 hour later after trouble)

Motor defect, hooked of lead wireto fan, contact of structures withfan, short or open of leadwire(there is no signal of BLDCmotor more than 115 seconds inoperation of fan motor)

Short or open of lead wireconnecting between main PCBand display PCB, transmission trand receiving part

Ambient sensor short circuit

Optichill sensor short circuit

Icemaker sensor short circuit

Faulty icemaker unit motor or hallic, lead wire short circuit, faultymotor dirving circuit.

Water Tank Sensor short circuit

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

StandardRPM

StandardRPM

StandardRPM

StandardRPM

StandardRPM

OFF

StandardRPM

StandardRPM

OFF

ON for 15minutes / OFF for 15minutes

No defrost

Full opening for10 minutes/

Full closing for15 minutes

: Proper operation



(3) GR-L267BNRY (Refer to appendix)

MICOM FUNCTION

- 28 -



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).

Note 2) Freezer notch temperature display and refrigerator notch temperature display (Failure code indication part) are

normally indicated in abnormal ambient sensor, and Er indicated on the ambient 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, the 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).

MICOM FUNCTION

- 29 -

The other LED or

LCD Graphics

Turn On.

R2-sensor (middle room)or Abnormal Drive MicomCommunication

OptChill sensor orWater tank sensor

Icemaking sensor

Icemaker unit

Ambient sensor(GR-L267V(T)R (Refer toappendix) Model Only)

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

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

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

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

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



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 regardless 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.

Always wait at least 3 minutes before restarting a compressor to allow the pressures to equalize and to avoid damage.

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. If you press the TEST button while a failure code is displayed, the test mode will not begin.

MICOM FUNCTION

- 30 -

Test 1

Test 2

NormalStatus

Mode Operation Contents Remarks

Press test button once(strong cold mode)

Press test button once atthe test mode 1 status(forced defrost mode)

Press test button once atthe test mode 2 status

1. Continuous operation of compressor2. Continuous operation of freezing bldc motor

(high-speed RPM) and cooling bldc motor3. Defrost heater turns off

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

5. Optichil stepping motor damper is completelyclosed.

6. All display LEDs or LCD graphics turn on.

1. Compressor OFF2. Freezing bldc motor and cooling bldc motor

turn off3. Defrost heater turns on4. Stepping motor damper is completely closed

(closing of baffle)5. OptiChil stepping motor damper is completely

closed.6. GR-L267BV(T)RA, GR-L267BV(T,S)PA (Refer

toappendix)GR-L267BV(T)R (Refer to appendix )

Return to the initial status.

Freezing fan turns off indoor opening.

Return to the normal modewhen the defrost sensor isabove +5°C

Compressor will operateafter delay for 7 minutes

EXPRESS DIGITAL CONTROL

FRZ TEMP REF TEMPJET

CUBE

FILTER RESET

HOLD 3SECSROOM TEMP

LOCK

DISPENSER & KEY

WATER

CRUSH3 SECS

F

CFC

F

C

FILTER

TEST MODE1 STATUS DISPLAY

TEST MODE2 STATUS DISPLAY



2-18. Function of dispenser and water dispenser built-in1. The dispenser allows ice and water to be served without opening the freezer door.

2. Press the dispenser switch (the rubber button) after selecting crushed ice, cubed ice, or water. The dispenser door will

open automatically. It will close automatically 5 seconds after dispensing is completed, and you will hear the CLICK.

3. The dispenser will not operate when the freezer door is open.

4. The ice dispenser will automatically stop after 3 minutes even without an OFF signal. The ice door will close automatically

5 seconds after that, and you will hear the CLICK.

5. Dispenser Lamp ON/ OFF Function.

The dispenser lamp is operated in conjunction with the dispenser switch. It comes on when ice or water is dispensed, and

turns off when dispensing is completed.

6. Selection function of water/crushed/cube ice

1) This allows the selection of water/cubed/crushed ice. Press the button to cycle through WATER→ CRUSHED

→CUBED.

2) At initial power-on, the dispenser defaults to CUBED ICE.

3) When CUBE ICE is selected, the geared motor rotates so CUBED ICE is dispensed.

4) When CRUSHED ICE is selected, the geared motor rotates in the opposite direction so CRUSHED ICE is dispensed.

7. Water dispenser function1) Select WATER to dispense water.

2) The water line is a direct connection to the household water supply. If water is selected at the dispenser, a solenoid

opens and allows water to flow. A similar solenoid is operated in conjunction with the icemaker to fill it at the

appropriate time in its cycle.

MICOM FUNCTION

- 31 -



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:

(1) GR-L267BV(T)R (Refer to appendix)

EXPLANATION FOR MICOM CIRCUIT

- 32 -

Part VA1 CE1 CE2 CE3 CE4 CE5

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



(2) GR-L267BV(T)RA (Refer to appendix)

(3) GR-L267BV(T,S)PA (Refer to appendix)


- 33 -



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, BNRY (Refer to appendix)




- 34 -



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.





- 35 -



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 paralleltoward 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.



- 36 -

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

StatusON Within 1 V

OFF 12 V

Type of Load CompressorFrost Removal

Heater

AC Converting

Relay

Refrigerator

LAMP

Dispensor

Heater





- 37 -






- 38 -

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

StatusON Within 1 V

OFF 12 V

Type of Load CompressorFrost Removal

Heater

AC Converting

Relay

Refrigerator

LAMP

Dispensor

Heater



2. Dispenser operation circuit


1) Check load driving status

2) Lever Switch sensing circuit


- 39 -

Measuring part

Lever S/WIC1(MICOM) (No. 16)

ON (Press)

OFF 5V

0 V(60 Hz)

5 V

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

StatusON Within 1 V

OFF 12 V

Type of LoadGEARED

MOTOR

SOLENOID

CUBE

WATER VALVE

WATER

SOLENOID

DISPENSER







- 40 -

Measuring part


ON (Press)

OFF 5V

0 V(60 Hz)

5 V


StatusON Within 1 V

OFF 12 V

Type of LoadGEARED

MOTOR

SOLENOID

CUBE

WATER VALVE

WATER

SOLENOID

DISPENSER







- 41 -

Measuring part


ON (Press)

OFF 5V

0 V(60 Hz)

5 V


StatusON Within 1 V

OFF 12 V

Type of LoadGEARED

MOTOR

SOLENOID

CUBE

WATER VALVE

WATER

SOLENOID

DISPENSER



3. Door opening sensing circuit




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.


- 42 -

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)

Measuring partIC1 (MICOM) No. (44, 45) / (45, 46) / (47, 48) Pin

Door of Freezer / Refrigerator



1-5. Temperature sensing circuit




- 43 -

E

F

A

B

D

C

A

B

C

D

F

E

RW110KF

CE18

R73

CC32




The circuits involving the freezer and refrigerator sensors control 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.


- 44 -

E

F

B

A

D

G

C

SENSOR CHECK POINT NORMAL(-30 °C ~ 50 °C) IN SHORT IN OPEN

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



1-6. Switch entry circuit

The following circuits are sensing signals from the test switch, damper motor reed switch for testing and diagnosing the

refrigerator.





- 45 -



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



The circuits shown above may vary by model.

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


- 46 -



1-8. Stepping motor operation circuit





- 47 -



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 ofIC10 (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.


- 48 -

INA

INB

A

B

A

B

CCW (Reverse rotation) (Positive rotation) CW



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.



- 49 -

a , d part b part e part

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

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

a

b

e

d





- 50 -






- 51 -

a

b

d

e

b

a

d

e



1-10. Temperature compensation and temperature compensation circuit

1. Temperature compensation in freezer and refrigerator

(1) GR-L267BV(T)R (Refer to appendix) (2) GR-L267BV(T)RA (Refer to appendix)


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

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

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


- 52 -

Temperature compensation at refrigerator

Temperature compensation at freezer

Temperature compensation at refrigerator

Temperature compensation at freezer

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] Reference temperature

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 at the refrigerator is as follows:

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.


- 53 -

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 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C 5 °C

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]

change Up Up Up Up Up Up Up Up Up Up

0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C 4.5 °C

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]

Down change Up Up Up Up Up Up Up Up Up

1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C 4 °C

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]

Down Down change Up Up Up Up Up Up Up Up

1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C 3.5 °C

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]Down Down Down change Up Up Up Up Up Up Up

2 °C 1.5 °C 1 °C 0.5 ° No 0.5 °C 1 °C 1.5 °C 2 °C 2.5 °C 3 °C

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 Down Down Down Drop change Up Up Up Up Up Up

(RCR1) 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °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 change Up Up Up Up Up

3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C 2 °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 change Up Up Up Up

3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °C 1.5 °C18 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 change Up Up Up

4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No 0.5 °C 1 °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 change Up Up

4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °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 change Up

5 °C 4.5 °C 4 °C 3.5 °C 3 °C 2.5 °C 2 °C 1.5 °C 1 °C 0.5 °C No

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 change

Modification

resistance

Current

resistance



2. Compensation circuit for temperature at freezer

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

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


- 54 -

Compensation Compensation

for weak-cold for over-cold Temperature compensation value Remarks

JCR3 JCR4 JCR1 JCR2at refrigerator

0 °C (In shipment from factory)

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 CUT -1 °C [-1.8 °F]

CUT CUT CUT +1 °C [+1.8 °F]

CUT CUT CUT CUT 0 °C [0 °F]

Temperature compensation in CUT

JCR1 +1 °C [+1.8 °F]+2 °C [+3.6 °F]

JCR2 +1 °C [+1.8 °F]

JCR3 -1 °C [-1.8 °F]-2 °C [-3.6 °F]

JCR4 -1 °C [-1.8 °F]



1-11. Communication circuit and connection Lead 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.



- 55 -

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






- 56 -

EXPRESSFRZ

ON

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

FWATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP


FILTER

EXPRESS

JET

CUBE

ROOM TEMPERATURE

LOCK

DISPENSER & BUTTON

FWATER

CRUSH

C

3 SECS

DIGITAL CONTROL

FRZ TEMP

F

C

F

C

REF TEMP


FILTER



2) Sensor resistance characteristics table

u Resistance value allowance of sensor is ±5%.

uWhen 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.


- 57 -

Measuring Temperature Measuring TemperatureFreezing Sensor

Cold storage sensor 1 & 2

(°C) (°F) Frost removal sensor, Outside sensor

-20 °C -4 °F 22.3 kΩ 77 kΩ

-15 °C +5 °F 16.9 kΩ 60 kΩ

-15 °C +14 °F 13.0 kΩ 47.3 kΩ

-5 °C +23 °F 10.1 kΩ 38.4 kΩ

0 °C +32 °F 7.8 kΩ 30 kΩ

+5 °C +41 °F 6.2 kΩ 24.1 kΩ

+10 °C +50 °F 4.9 kΩ 19.5 kΩ

+15 °C +59 °F 3.9 kΩ

15.9 kΩ

+20 °C +68 °F 3.1 kΩ 13 kΩ

+25 °C +77 °F 2.5 kΩ 11 kΩ

+30 °C +86 °F 2.0 kΩ 8.9 kΩ

+40 °C +104 °F 1.4 kΩ 6.2 kΩ

+50 °C +122°F 0.8 kΩ 4.3 kΩ



1-12. OptiChill stepping MOTOR/Display


1-13. Jet Freezing



- 58 -



2. PWB parts diagram and list

2-1. PWB Assembly, main part diagram



- 59 -





- 61 -





- 63 -



2-2. Parts list



- 65 -




- 66 -





- 67 -




- 68 -





- 69 -




- 70 -





- 71 -




- 72 -



2-3. DISPLAY ASSEMBLY part diagram



- 73 -





- 74 -



(3) GR-L267BV(T)RA, GR-L267BV(T,S)PA (Refer to appendix)


- 75 -



2-4. DISPLAY circuit diagram



- 76 -

SW102 SW105

L115,116

D105

L 1 1 7, 1 18 L 1 19 , 12 0

SW104

D104D101

SW103

L139..142L125..128

SW101 SW106

L113,114

L121..124

L133,134

1N4148X6

L111,112

L135..138

D102 D106D103

(Re fr i ge rate l o w) (Re fr i ge rate l ow/

medium)

(Refrigerate

medium)

(Refrigerate

medium/ high)

(Refrigerate

high)

(Lock on)

(Special on)(Freeze high)(Freeze medium/ high)

(Freeze medium)(Freeze low/ medium)

(Freeze low)

(Lamp)(Filter)(Crushed)(Water)(Cube)

L101,102 L103,104 L107,108 L143,144L109,110L105,106

10

9

8

7

6

5

4

3

2

1

L129..132





- 77 -

(Re fr i g era te l o w) (Re fr i g era te l o w/

medium)

(Refrigerate

medium)

(Refrigerate

medium/ high)

(Refrigerate

high)

(Lock on)

(Special on)(Freeze high)(Freeze medium/

high)

(Freeze medium)(Freeze low/

medium)

(Freeze low)

(Lamp)(Filter)(Crushed)(Water)(Cube)



(3)GR-L267BV(T)RA, GR-L267BV(T,S)PA (Refer to appendix)


- 78 -



3. PWB Circuit Diagram may vary by to model.



- 79 -




- 80 -





- 81 -




- 82 -





- 83 -




- 84 -





- 85 -




- 86 -



1. Working Principles

1-1. ICEMaker 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 (Refer to appendix) 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 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 bin.

6. If there is ice in the bin, pushing the dispenser button will dispense it.

7. When dispenser water 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.

ICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR

- 87 -

• Level Icemaker Cube mold for Initial Control after power is input.

Power Input

Initial Control

Icemaking Control

Ice Ejection Control

Water Supply Control

Test Control

• Wait until the water in the cube mold is frozenafter icemaker starts operation.

• Check ice bin is full of ice by rotating the ice ejectionmotor in normal and reverse direction and eject ice intothe ice bin if ice bin is not full.

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

• Conduct Icemaking Control after supplying water into the icemakercube mold by operating water valve.



2. Function of Icemaker

2-1. Initial Control Function

1. When power is initially applied or reapplied after power cut, it detects level of icemaker cube mold after completion of

MICOM initialization. The detecting lever moves up and down.

2. The level of ice maker cube mold is judged by output signal, high and low signal, of Hall IC. Make the cube mold 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 signal 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 icemaker cube mold is horizontal.

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

2-2. Water Supply Control Function

1. This is to supply water into the ice maker cube mold by operating water valve in the mechanical area 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

3. If the water supply quantity setting is changed while the power is on, the change will take effect immediately. If it is

changed while the icemaker is filling the mold, the new setting will take effect the next time the, icemaker cycles.

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. Icemaking Control Function

1. Icemaking control is carried out from the completion of water supply to the completion of ice making in the cube mold.

Icemaking sensor detects the temperature of cube mold and completes ice making. (ice making sensor is fixed below

icemaker cube mold)

2. Icemaking control starts after completion of water supply control or initial control.

3. The icemaker determined it’s cycle is completed when the Icemaking sensor reaches -8 °C (17.6°F) after 100 minutes

have passes since water filled the mold.

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

condition 3.


- 88 -

* The quantity of water

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)

* DIP switch is on the main

PWB.

GR-L267BV(T)R (Refer to appendix)GR-L267BV(T)RA, GR-L267BV(T,S)PA

(Refer to appendix)

NoDIP SWITCH SETTING

S1 S2

DIP SWITCH SETTING

S1 S2 S3

1

2

3

4

5

6

7

8

OFF OFF 6.5 SEC

ON OFF 5.5 SEC

OFF ON 7.5 SEC

ON ON 8.5 SEC

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

WATER

SUPPLY TIME

REMARKS



2-4. Ice Ejection Control Function1. This is to eject ice from ice maker cube mold after icemaking is completed.

2. If Hall IC signal is on within 3 6/10 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 bin is

full, ice ejection motor rotates in reverse direction and sotps under icemaking or waiting conditions.3. If ice bin is not full, ice ejection starts. The cube mold tilts to the maximum and ice is separated from the mold 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 6/10 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 mold stops for 1 second at maximum tilted conditions.

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

8. When the mold becomes horizontal, the cycle starts to repeat:

Water Supply Ice Making Ice Ejection Mold Returns to Horizontal


- 89 -

Bin isnot full

HALL ICOUTPUTSIGNALS

Bin isfull

HALL ICOUTPUTSIGNALS

ICE CHECKINGAXIS

ICE CHECKING LEVEL 30°

Maximum tiltingpoint

Icemaking(Original point)

Lock

2±1 sec

9±3 sec

8±3 sec

Ice Checking Ice Ejection Lock

HorizontalConditions

Level RetrunConditions



2-5 Test Function1. It is to force the operation during operation test, service, and cleaning. The test switch is mounted under the automatic

icemaker. The test function starts when the test switch is pressed for more than 1/2 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If mold is

full of ice during test function operation, ice ejection control and water supply control do not work.

3. If the mold is in the horizontal (normal) position and the TEST switch is pressed for more than1/2 second, ice ejection will begin regardless of how frozen the water might be. When the ejection is completed, the

icemaker will refill the mold with water. Consequently, problems related to filling, ejecting, and returning to the horizontal

position can be checked using the test switch. When this test is performed, the buzzer will sound and water will fill the

mold. Check the icemaker for repair if the buzzer does not sound.

4. When water supply is completed, the cycle operates normally as follows: Icemaking Ice ejection Returning to

horizontal conditions Water supply

5. Remove ice from the icemaker cube mold and press test switch when icemaker cube mold is full of ice as ice ejection and

water supply control do not work when cube mold 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 mold returning to horizontal condition, ice ejection and cube mold

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 regardless of refrigearator compartment door opening.


- 90 -



3. Icemaker Troubleshooting

* Troubleshooting: it is possible to confirm by pressing freezer and refrigerator temperature control buttons for more than 1

second. (icemaker is normal if all LEDs are on): refer to trouble diagnosis function in MICOM function 2-

8 (page 21)


- 91 -

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 icemaking sensor

• Check the resistance ofboth ends (1,2) of icemaking

sensor of CON9.

• Defects between icemaking

sensor and board

(Pin No. 60 of IC1)

Replace Icemaking

Sensor

Is Crushed Ice LCD off during

troubleshooting check?

Failed Icemaker Unit

• Is the resistance of both ends(9,10) of ice ejection motor ofCON9 between 18 and 22Ω?

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

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

• Confirm ice ejection and levelreturn when pressingtest switch.

Replace Icemaker Unit

Replace Main PWB

Are iceejection and level return

normal when test switch ispressed for more than 1/2 second?

Does the bellsound once?

Failed icemaker 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 CON9icemaker stop switch short?

Replace Icemaker 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 supplyIs water suppy normal

after Ice ejection and level return

by ice ejection motor?

Normal



4. Icemaker Circuits


2) GR-L267BV(T)RA (Refer to appendix)


- 92 -




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

icemaker unit in the freezer and icemaker driving part of main PWB. Water is supplied to the icemaker cube mold through

the solenoid relay for ice valve of solenoid valve in the mechanical area 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

icemaker cube mold, ice full detection, leveling, Ice making temperature detection, etc. Refer to the temperature detecting

circuits of Main PWB for Ice making temperature detection. Icemaker 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

icemaker. The test function starts when the test switch is pressed for more than 1/2 second.

2. Test button does not work during ice ejection and water supply. It works when it is in the horizontal conditions. If cube

mold is full of ice during test function operation, ice ejection control and water supply control do not work.

3. Ice ejection carries out regardless of ice formation in the ice making tray if test switch is pressed for more than 1/2

second. Water will be splashed if test switch is pressed before the water in the mold is completely frozen. Water will be

supplied while the mold 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: Icemaking Ice Ejection Level Return Water Supply.

5. If icemaker stop switch is set to ON, normal cycle operates: Icemaking Ice Ejection Level Return Water Supply.

If is set to OFF, ice making conducts but ice ejection, level return, and water supply do not work.


- 93 -




CIRCUIT

- 94 -

3854JD1125A

SENSOR




CIRCUIT

- 95 -




CIRCUIT

- 96 -

3854JD1125B




CIRCUIT

- 97 -

3854JD1125C



1. Troubleshooting

TROUBLE DIAGNOSIS

- 98 -

CLAIMS. CAUSES AND CHECK POINTS. HOW TO CHECK

1. Faulty start1) No power at outlet.

2) No power on cord.

3) Shorted start circuit.

4) During defrost.

* Measuring instrument:

Multi testerCheck 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

Check both terminals ofOLP

If power conducts:OK.

If not:NG.

Check the resistance of both

terminals.

At normal temperature 6:

OK.

If disconnected:∞.

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.

No power on

power cord.

OLP is off.

No electric power on compressor. - Faulty compressor.

Faulty PTC.

Disconnected copper wire.

Internal electrical short.Faulty terminal contact.

Disconnected.

Capacity of OLP is small.

Characteristics of OLP is bad.Bad connection.

Power isdisconnected.

Inner Ni-Cr wire blows out.

Bad internal connection.

Faulty terminal caulking (Cu wire is cut).

Bad soldering.

Weak connection.

Short inserted cord length.

Worn out tool blade.

Loose contact.

- Large distance between

male terminal.

- Thin female terminal.

Terminal disconnected.

Bad sleeve assembly.

Power cord is disconnected.

Faulty soldering.

Start automatic defrost.

Cycle was set at defrost when the refrigerator

was produced.

Power does not conduct. - Damage.

Bad characteristics. - Initial resistance is big.

Bad connection with

compressor.

Bad terminal connection.

Too loose.

Assembly is not possible.



TROUBLE DIAGNOSIS

- 99 -


2. No cooling. 2) Refrigeration system is clogged. 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.

Moisture

clogged.

No electric

power on

thermo-

stat.

Weld joint

clogged.

Drier clogging.

Foreign material 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.

Caps are missed.

Air blowing.

During transportation.

During work.

Not performed.

Performed.

Too short time.

Low air pressure.

Less dry air.

Air Blowing.

Leave it in the air.

Caps are missed.

Short pipe insert.

Pipe gaps.

Too much solder.

Too large.

Damaged pipes.

Not dried in the compressor.

Elapsed more than 6 months after drying

Caps are missed.

No pressure when it is open.

During rest time.

After work.

Compressor cap is disconnected.

Foreign materials are in the pipe.

Not performed.

Too short.Impossible moisture

confirmation.

Low air pressure.

Dry drier - Drier temperature.

Leave it in the air.

The capillary tube inserted depth. - Too much.

Capillary tube melts. - Over heat.

Clogged with foreign materials.

Reduced cross section by cutting. - Squeezed.

Desiccant powder.

Weld oxides.

Drier angle.

Check on package

condition.

Good storage after

finishing.



TROUBLE DIAGNOSIS

- 100 -


3. Poor Cooling

Plateheater

Cord

heater

1) Refrigerant Partly leaked.

2) Poor defrosting capacity.

Drain path (pipe) clogged.

Defrost heater does notgenerate heat.

Weld joint leak.

Parts leak.

Inject adiabatics into drain

hose.

Foreign materials

penetration.

Cap drain is not disconnected.

Inject through the

hole.

Seal with drain.

Adiabatics lump input.

Damage by a screw or

clamp.

Other foreign materials input.

Partsdisconnected.

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

V2P= —

R

V2

R= —P


http://slidepdf.com/reader/full/lsc26905xx-lg-26-cu-ft-side-by-side-refrigerator-service-manual 93/145- 101 -

TROUBLE DIAGNOSIS


3. Poor Cooling

3) Cooling air leak.

4) No cooling air circulation.

Residual

frost.

No automatic defrosting.

Defrost does not return.

Bad gasket adhestion

Door sag.

Faulty fan motor.

Weak heat from heater.

Too short defrosting time. Defrost Sensor.

- Faulty characteristics.

Seat-D (missing, location. thickness).

Structural fault. Gasket gap.Air inflow through the fan motor.

Bad insulation of case door.

Sheath Heater - rated.

Gap.

Bad attachment.

Contraction.

Bad adhesion.

Weak binding force at hinge.

Fan motor.

Door switch.

Self locked.

Wire is cut.

Bad terminal contact.

Contact distance.

Button pressure.

Melted contact.

Contact.

Poor door

attachment.

Door liner

(dimension).

Contraction inner

liner.

Misalignment.

Bad terminal

connection.

Adiabatics liquid

leak.

Faults.

Refrigerator and freezer switch reversed.

Button is not pressed.

Check the fan motor

conduction: OK.

No conduction: NG.



TROUBLE DIAGNOSIS

- 102 -


3. Poor Cooling 4) No cooling air circulation.

5) Compressor capacity.

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.

Faulty fan motor.

Small cooling air

discharge.

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 misuse.

Bad shape.

Loose connection. - Not tightly connected.

Insert depth.

Rating misuse.

Small capacity.

Low valtage.

Malfunction of charging cylinder.

Wrong setting of refrigerant.

Insufficient compressor. - Faulty compressor.

Fan overload. - Fan misuse.

Bad low termperature RPM characteristics.

Rated power misuse.

Low voltage.

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.



TROUBLE DIAGNOSIS

- 103 -


4. Warm

refrigerator

compartment

temperature.

5. No automatic

operation.

(faulty

contacts)

6. Condensation

and ice

formation.

1) Clogged cooling path.

2) Food storage.

1) Faulty temperature sensor in freezer or refrigerator compartment.

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.

1) Ice in freeezer compartment.

2) Condensation in the refrigerator compartment.

3) Condensation on liner foam.

Adiabatics liquid leak ?.

Foreign materials. –– Adiabatics dump liquid

Faulty contact.

Faulty temperature characteristics.

External air inflow. ––Bushing installed incorrectly.

Door opens

but not closes.

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

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

Door opens

but not closes.

Gasket gap.

Cool air leak

and transmitted.

High ambient temperature.

Insufficient space around refrigertor.

Different rating.

Small capacity.

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.

Too much food.

Hot food.

Weak door closing power.

Stopper malfunction.

Door sag.

Food hinders door closing.

Insufficient closing.

Door sag.

Food hinders door closing.

Top table part.

Out plate Ref/Lower part.

Not fully filled.

Flange gap. –– Not sealed.

Gasket gap.

Inspect parts measurements

and check visually.



TROUBLE DIAGNOSIS

- 104 -


6. Condensation

and ice

formation.

7. Sounds

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.

Adiabatics liquid contraction.

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.

Breaks, holes.

Small Capacity.

Position of drain.

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. Chattering sound.

Insulation paper vibration.

Capacitor noise. Pipe contacts each other. – Narrow interval.

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

Damping Bushing-S.

Capillary tube unattached.

Recess Heater is cut.

Duct door is open. / Foreign material clogging.

Bad wing adhesion. Wing sag(lower part).

Door liner shape mismatch.

Corner. Too much notch.

Broken.

Home Bar heater is cut.

Liquid shortage.

Liquid leak.



TROUBLE DIAGNOSIS

- 105 -


7. Sounds 1) Compressor compartment operating sounds.

Transformer sound.

Drip tray vibration sound.

Back cover machine sound.

Condenser drain sound.

2) Freezer compartment sounds.

Fan motor sound.

Sounds from fancontact.

Unbalance fan sounds.

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.

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. Aged rubber seat.

Bad torque for assembling motor

bracket.

Fan guide contact.Shroud burr contact.

Damping evaporator contact.

Residual frost contact.

Unbalance.

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

bushing assembly.)

Supporter disorted.

Tilted during motor assembly.

Evaporator pipe contact. –– No damping evaporator.

Sound from refrigerant. –– Stainless steel pipe shape in

accumulator.

Sound from fin evaporator and pipe during expansion

and contraction.

Damaged heater cord.

Narrow evaporator interval.

Surface machining conditions.

Fan distortion.

Misshappen.

Burr.



TROUBLE DIAGNOSIS

- 106 -


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.



TROUBLE DIAGNOSIS

- 107 -


10. Structure,

appearance,

and others.

1) Door foam.

Sag.

Noise during

operation.

Malfunction.

2) Odor.

Temperature of

refrigerator

compartment.

Deodorizer.

Food Storage.

Others.

Hinge loose

Weak gasket

adhesion.

Fixed tape.

Hinge interference.

Not closed Interference between door liner and inner liner.

Refrigerator

compartment isopened when freezer

compartment is

closed (faulty stopper).

High. Faulty damper control.

Button is set atweak .

Door is open (interference by

food).

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 doorassembly.

No stopper.

Bolt is loosened during

transportation.

Not tightly fastened.

Screw worn out .

Adhesion surface.

Not well fixed.



2 .

F a u l t s

2 - 1 .

P o w e r

2 - 2 .

C o m p r e s s o r

TROUBLE DIAGNOSIS

- 108-

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

N o p o w e r o n

- P o w e r

c o r d c u t .

- C h e c k

t h e v o l t a g e w i t h t e s t e r .

- R e p l a c

e t h e c o m p o n e n t s .

o u t l e t .

- F a u l t y c o n n e c t o r i n s e r t i o n .

- C h e c k

v i s u a l l y .

- R e c o n n e c t t h e c o n n e c t i n g p a r t s .

- F a u l t y c o n n e c t i o n b e t w e e n p l u g

- C h e c k

v i s u a l l y .

- R e c o n n e c t t h e c o n n e c t i n g p a r t s .

a n d a d a p t e r .

F u s e b l o w s o u t . - S h o r t c

i r c u i t b y w r o n g c o n n e c t i o n .

- C h e c k

t h e f u s e w i t h t e s t e r

- F i n d a

n d r e m o v e t h e c a u s e o f

- R e p l a

c e w i t h r a t e d

- L o w

v o

l t a g e p r o d u c t s a r e

o r v i s u

a l l y .

p r o b l e m ( e

x . s h o r t , h i g h v o l t a g e ,

f u s e a

f t e r c o n f i r m i n g

c o n n e c

t e d t o h i g h v o l t a g e .

- C h e c k

t h e i n p u t v o l t a r e w i t h t e s t e r

l o w

v o

l t a g e ) .

i t s s p e c i f i c a t i o n .

- S h o r t c

i r c u i t b y i n s e c t s .

( b e t w e

e n p o w e r c o r d a n d p r o d u c t s ) . - R e p l a c e w i t h r a t e d f u s e .

- E l e c t r i c

i t y l e a k a g e .

- C h e c k

t h e r e s i s t a n c e o f p o w e r c o r d

I f f u s

e b l o w n s o u t

- H i g h v o

l t a g e .

w i t h t e s t e r ( i f i t i s 0 Ω ,

i t i s s h o r t e d ) .

f r e q u e n t l y , c o n f i r m

- S h o r t c

i r c u i t o f c o m p o n e n t s

t h e c

a u s e a n d p r e v e n t .

( t r a c k i n

g d u e t o m o i s t u r e a n d d u s t

p e n e t r a t i o n ) .

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

C o m p r e s s o r

- F a u l t y P T C .

- C h e c k

t h e r e s i s t a n c e .

- I f r e s i s

t a n c e i s i n f i n i t e , r e p l a c e i t

d o e s n o t

V l a u e : ∞

i s d e f e c t i v e .

w i t h n e w

o n e .

o p e r a t e .

- I f i t i s n o t i n f i n i t e ,

i t i s n o r m a l .

- C h e c k

o t h e r p a r t s .

- C o m p r e s s o r i s f r o z e n .

- I f c o m p r e s s o r a s s e m b l y p a r t s a r e

- D u r i n g

f o r c e d o p e r a t i o n :

n o r m a l ( c a p a c i t o r , P T C ,

O L P ) ,

- O p e r a

t e s : C h e c k o t h e r p a r t s .

a p p l y p

o w e r d i r e c t l y t o t h e

- N o t o p e r a t e : R e p l a c e t h e f r o z e n

c o m p r e s s o r t o f o r c e o p e r a t i o n .

c o m p r e s s o r w i t h n e w

o n e , w e l d ,

e v a c u

a t e , a n d r e c h a r g e r e f r i g e r a n t .

O L P

I t s t a r t s a s s o o n a s i t i s

• R e f e r

t o w e l d r e p a i r p r o c e d u r e s .

c o n t a c t e d .

A u x i l i a r y w i n d i n g

M a i n w i n d i n g

P o w e r



2 - 3 .

T e m p e r a t u r e

TROUBLE DIAGNOSIS

- 109 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

H i g h

P o o r c o o

l a i r c i r c u l a t i o n d u e t o f a u l t y

- L o c k – – C h e c k r e s i s t a n c e w i t h a

- R e p l a c e f a n m o t o r .

t e m p e r a t u r e

f a n m o t o r .

t e s t e r .

i n t h e f r e e z e r

0 Ω : s h o r t .

c o m p a r t m e n t .

∞ Ω : c u t .

- R e c o n

n e c t a n d r e i n s e r t .

- R o t a t e

r o t o r m a n u a l l y a n d c h e c k

r o t a t i o n .

- W i r e i s

c u t .

- B a d t e

r m i n a l c o n t a c t : C h e c k

- M a i n t a

i n c l e a r a n c e a n d r e m o v e i c e

t e r m i n a l v i s u a l l y .

( R e p a i r a n d / o r r e p l a c e s h r o u d i f f a n

- F a n c o

n s t r a i n t . – F a n s h r o u d

i s c o n s t r a i n e d b y s h r o u d

c o n t a c t : C o n f i r m

d e f o r m

a t i o n ) .

v i s u a l l y .

– F a n i c i n g :

C o n f i r m v i s u a l l y .

F a u l t y f a

n m o t o r d u e t o f a u l t y d o o r

- I c e d b u t t o n ( f a u l t y ) o p e r a t i o n :

- C o n f i r m i c i n g c a u s e s a n d r e p a i r .

s w i t c h o p e r a t i o n .

P r e s s b u t t o n t o c h e c k

- R e p l a c e d o o r s w i t c h .

- F a u l t y

b u t t o n p r e s s u r e a n d c o n t a c t :

P r e s s b u t t o n t o c h e c k o p e r a t i o n .

- D o o r c

a n n o t p r e s s d o o r s w i t c h

- D o o r s

a g : f i x d o o r .

b u t t o n : C h e c k v i s u a l l y .

- D o o r l i n e r b e n t : r e p l a c e d o o r o r

a t t a c h

s h e e t s .

B a d r a d i a t i o n c o n d i t i o n s i n

- C h e c k

t h e c l e a r a n c e b e t w e e n t h e

- K e e p c l e a r a n c e b e t w e e n

- T h e f a n m a y b e

c o m p r e s

s o r c o m p a r t m e n t .

r e f r i g e r a t o r a n d w a l l ( 5 0 m m i n

r e f r i g e r a t o r a n d w a l l s ( m i n i m u m

b r o k e n o f d a m a g e d

m i n i m u

m ) .

5 0 m m ) .

i f c l e a

n e d w h i l e t h e

- C h e c k

d u s t o n t h e g r i l l i n

- R e m o v e d u s t a n d c o n t a m i n a n t s

r e f r i g e r a t o r i s

c o m p r e s s o r c o m p a r t m e n t .

f r o m g r i l l f o r e a s y h e a t r a d i a t i o n .

r u n n i n

g .

- C h e c k

d u s t o n t h e c o n d e n s e r c o i l s . - R e m o v e t h e d u s t w i t h v a c u u m

c l e a n e

r f r o m t h e c o i l s c o n d e n s e r

w h i l e t h e r e f r i g e r a t o r i s o f f .



2 - 4 .

C o o l i n g

TROUBLE DIAGNOSIS

- 110 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

H i g h

R e f r i g e r a n t l e a k .

C h e c k s

e q u e n c e

W e l d t h e l e a k i n g p a r t , r e c h a r g e t h e

D r i e r m

u s t b e r e p l a c e d .

t e m p e r a t u r e

1 . C h e c k t h e w e l d e d p a r t s o f t h e

r e f r i g e r a n t .

i n t h e f r e e z e r

d r i e r i n l e t a n d o u t l e t a n d d r i e r


a u x i l i a r y i n t h e c o m p r e s s o r

c o m p

a r t m e n t ( h i g h p r e s s u r e s i d e ) .

2 . C h e c k t h e e n d o f c o m p r e s s o r

s e a l i n

g p i p e ( l o w p r e s s u r e s i d e ) .

3 . C h e c k s i l v e r s o l d e r e d p a r t s .

4 . C h e c k b e n d i n g a r e a o f w i r e

c o n d e n s e r p i p e i n c o m p r e s s o r

c o m p

a r t m e n t ( c r a c k s c a n

h a p p e n d u r i n g b e n d i n g ) .

5 . C h e c k o t h e r p a r t s ( c o m p r e s s o r

c o m p

a r t m e n t a n d e v a p o r a t o r s i n

f r e e z e r c o m p a r t m e n t ) .

S h o r t a g e o f r e f r i g e r a n t .

C h e c k f r o s t f o r m a t i o n o n t h e s u r f a c e

- F i n d o u t t h e l e a k i n g a r e a , r e p a i r ,

D r i e r m


o f e v a p o r a t o r i n t h e f r e e z e r

e v a c u a t e , a n d r e c h a r g e t h e



- I f t h e f r o s t f o r m s e v e n l y o n t h e

- N o l e a

k i n g , r e m o v e t h e r e m a i n i n g

s u r f a c e , i t i s O K .

r e f r i g e r a n t , a n d r e c h a r g e n e w

- I f i t d o e s n o t , i t i s n o t g o o d .




TROUBLE DIAGNOSIS

- 111 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

H i g h

C y c l e p i p e i s c l o g g e d .

C h e c k s

e q u e n c e .

- H e a t u

p c o m p r e s s o r d i s c h a r g i n g

D i r e r m


t e m p e r a t u r e i n

1 . C h e c k t e m p e r a t u r e o f c o n d e n s e r

w e l d j o

i n t s w i t h t o u c h , d i s c o n n e c t

t h e f r e e z e r

m a n u

a l l y .

t h e p i p

e s , a n d c h e c k t h e c l o g g i n g .


I f i t i s

w a r m , O K .

R e m o v e t h e c a u s e s o f c l o g g i n g ,

I f i t i s

n o t , c o m p r e s s o r d i s c h a r g i n g

w e l d , e v a c u a t e , a n d r e c h a r g e

j o i n t s

m i g h t b e c l o g g e d .

t h e r e f r i g e r a n t .

2 . M a n u

a l l y c h e c k w h e t h e r h o t l i n e

- I f i t ' s w

a r m , O K . I f i t ' s n o t ,

p i p e i s w a r m .

c o n d e n s e r d i s c h a r g i n g l i n e w e l d

I f i t i s

w a r m , O K .

j o i n t s m i g h t b e c l o g g e d .

I f i t i s

n o t , c o n d e n s e r o u t l e t w e l d

D i s c o n

n e c t w i t h t o r c h , r e m o v e t h e

j o i n t s

m i g h t b e c o l g g e d .

c a u s e s , e v a c u a t e , a n d r e c h a r g e

s e a l r e

f r i g e r a n t .

L e a k a t l o o p p i p e w e l d j o i n t

C h e c k s

e q u e n c e .

R e p l a c e

t h e c o m p r e s s o r , w e l d ,

D r i e r m


( d i s c h a r g e ) i n c o m p r e s s o r .

1 . M a n u

a l l y c h e c k w h e t h e r

e v a c u a t e , a n d r e c h a r g e r e f r i g e r a n t .

c o n d e n s e r i s w a r m , I t i s n o t w a r m

a n d t h e f r o s t f o r m s p a r t l y o n t h e

e v a p o r a t o r i n t h e f r e e z e r

c o m p

a r t m e n t .

F a u l t y c o o l i n g f a n i n t h e c o m p r e s s o r

C h e c k s

e q u e n c e .

- R e p l a c e i f m o t o r d o e s n o t o p e r a t e .


1 . C h e c k c o o l i n g f a n o p e r a t i o n .

- I f f a n i s d i s c o n n e c t e d , c h e c k f a n

2 . C h e c k t h a t c o o l i n g f a n i s

d a m a g

e a n d r e a s s e m b l e i t .

d i s c o n n e c t e d f r o m t h e m o t o r .

R e f e r

t o f a n m o t o r d i s a s s e m b l y

a n d a

s s e m b l y s e q u e n c e .



2 - 5 .

D e f r o s t i n g f a i l u r e

TROUBLE DIAGNOSIS

- 112 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

N o d e f r o s t i n g .

H e a t e r d

o e s n o t g e n e r a t e h e a t a s

1 . C h e c k t h e r e s i s t a n c e o f h e a t e r .

H e a t i n g

w i r e i s s h o r t a n d w i r e i s c u t .

S e a l t h

e l e a d w i r e w i t h

t h e h e a t i n g w i r e i s c u t o r t h e c i r c u i t

0 Ω : S

h o r t . ∞ Ω : C u t .

• P a r t s r e p l a c e m e n t : R e f e r t o p a r t s

i n s u l a t i o n t a p e a n d h e a t

i s s h o r t e

d .

T e n s

t o t h o u s a n d s Ω : O K .

e x p l a n

a t i o n s .

s h r i n k t u b e i f t h e c u t

1 ) H e a t i n g w i r e i s d a m a g e d w h e n

2 . C h e c k t h e r e s i s t a n c e b e t w e e n

l e a d w i r e i s a c c e s s i b l e t o

i n s e r t i n g i n t o t h e e v a p o r a t o r .

h o u s i n g t e r m i n a l a n d h e a t e r

r e p a i r .

2 ) L e a d w i r e o f h e a t e r i s c u t .

s u r f a c e .

3 ) H e a t i n g w i r e a t l e a d w i r e c o n t a c t s

0 Ω : S

h o r t . ∞ Ω : C u t .

i s c u t .

T e n s

t o t h o u s a n d s Ω : S h o r t .

S u c t i o n t u b e a n d d i s c h a r g e o r i f i c e :

1 . C o n f i r m f o r e i g n m a t e r i a l s . I n c a s e

1 ) P u s h

o u t i m p u r i t i e s b y i n s e r t i n g

1 . I m p u r i t i e s .

o f i c e

, i n s e r t t h e c o p p e r l i n e

c o p p e r w i r e . ( T u r n o f f m o r e t h a n

2 . I c e .

t h r o u g h t h e h o l e t o c h e c k .

3 h o u

r s a n d p o u r i n h o t w a t e r i f

2 . P u t h o t w a t e r i n t o t h e d r a i n

f r o s t i s s e v e r e . )

( c h e c

k d r a i n s o u t s i d e ) .

2 ) P u t i n h o t w a t e r t o m e l t d o w n f r o s t .

3 ) C h e c

k t h e w a t e r o u t l e t .

4 ) P u s h

t h e h e a t e r p l a t e t o s u c t i o n

d u c t m a n u a l l y a n d a s s e m b l e t h e

d i s c o

n n e c t e d p a r t s .

G a p b e t w e e n S u c t i o n d u c t a n d

1 . C o n f i r m i n t h e S u c t i o n d u c t .

1 ) T u r n

o f f t h e p o w e r , c o n f i r m

H e a t e r p

l a t e ( I c e i n t h e g a p ) .

i m p u r i t i e s a n d i c e i n t h e g a p , a n d

s u p p l y h o t w a t e r u n t i l t h e i c e i n t h e

g a p m

e l t s d o w n .

2 ) P u s h

t h e H e a t e r p l a t e t o d r a i n

b o t t o m w i t h h a n d a n d a s s e m b l e

t h e d i s c o n n e c t e d p a r t s .

W r o n g h

e a t e r r a t i n g ( o r w r o n g

1 . C h e c k h e a t e r l a b e l .

F a u l t s : R e p l a c e .

a s s e m b l y ) .

2 . C o n f i r m t h e c a p a c i t y a f t e r

- H o w t o r e p l a c e :

s u b s t

i t u t i n g t h e r e s i s t a n c e v a l u e

R e f e r t o m a i n p a r t s .

i n t o t h e f o r m u l a .

( V : R a t e d v o l t a g e o f u s e r c o u n t r y )

( R : R e s i s t a n c e o f t e s t e r [ Ω ] )

C o m p a r e P a n d l a v e l c a p a c i t y .

T o l e r a n c e : ± 7 %

V 2

P = – – R



TROUBLE DIAGNOSIS

- 113 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

N o d e f r o s t i n g

M e l t i n g f u s e b l o w s .

- C h e c k

m e l t i n g f u s e w i t h t e s t e r . -

F a u l l t y p a r t s : p a r t s r e p l a c e m e n t .

1 ) L e a d w i r e i s c u t .

I f 0 Ω : O K .

- C h e c k

w i r e c o l o r w h e n m a e a s u r i n g

2 ) B a d s

o l d e r i n g .

I f ∞ Ω : w i r e i s c u t .

r e s i s t a

n c e w i t h a t e s t e r .

I c e i n t h e S u c t i o n d u c t .

1 . C h e c k t h e i n n e r d u c t w i t h m i r r o r .

1 ) T u r n

p o w e r o f f .

1 ) I c i n g b y f o r e i g n m a t e r i a l s i n t h e

2 ) R a i s e t h e f r o n t s i d e ( d o o r s i d e ) ,

d u c t .

s u p p o r t t h e f r o n t s i d e l e g s , a n d l e t

2 ) I c i n g b y c o o l a i r i n f l o w t h r o u g h

t h e i c

e m e l t n a t u r a l l y . ( I f p o w e r i s

t h e g a

p o f h e a t e r p l a t e .

o n , m

e l t t h e f r o s t b y f o r c e d

3 ) I c i n g b y t h e g a p o f h e a t e r p l a t e .

d e f r o s t i n g . )

2 . C h e c k b y i n s e r t i n g s o f t c o p p e r

3 ) R e a s

s e m b l e t h e h e a t e r p l a t e .

w i r e i n t o t h e d u c t ( s o f t a n d t h i n

c o p p e r n o t t o i m p a i r h e a t i n g w i r e ) .

B a d c o o l a i r i n f l o w a n d d i s c h a r g e ,

1 . T u r n o n p o w e r , o p e n o r c l o s e t h e

1 ) C h e c

k t h e f a u l t y c o n n e c t o r o f

a n d b a d

d e f r o s t i n g d u e t o f a u l t y

d o o r ,

c h e c k t h a t m o t o r f a n

h o u s i n g a n d r e a s s e m b l e w r o n g l y

c o n t a c t a n d i n s e r t i o n ( b a d c o n n e c t o r

o p e r a

t e s ( I f i t o p e r a t e s , m o t o r f a n

a s s e m b l e d p a r t s .

i n s e r t i o n

i n t o h o u s i n g o f h e a t e r ,

i s O K

) .

2 ) I f t h e

p a r t s a r e d a m a g e d ,

m e l t i n g ,

f u s e , a n d m o t o r f a n ) .

2 . D i s c o

n n e c t p a r t s i n t h e r e f r i g e r a t o r

r e m o v e t h e p a r t s a n d r e p l a c e i t

c o m p a r t m e n t , c h e c k t h e c o n n e c t i o n

w i t h a n e w o n e .

a r o u n

d t h e h o u s i n g v i s u a l l y ,

d e f r o s t , a n d c o n f i r m h e a t g e n e r a t i o n

o n t h e h e a t e r . D o n o t p u t h a n d s o n

t h e s h e a t h h e a t e r .

3 . C h e c k t h e p a r t s w h i c h h a v e f a u l t s

d e s c r

i b e d i n 1 & 2 ( m e c h a n i c a l

m o d e

l : d i s c o n n e c t t h e r m o s t a t

f r o m t h e a s s e m b l y ) .



2 - 6 .

I c i n g

TROUBLE DIAGNOSIS

- 114 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

I c i n g i n t h e

1 ) B a d c

i r c u l a t i o n o f c o o l a i r .

- C h e c k

t h e f o o d i s s t o r e d p r o p e r l y

- B e a c q u a i n t e d w i t h h o w t o u s e .

- C h e c k t h e d e f r o s t

r e f r i g e r a t o r

- C l o g g e d i n t a k e p o r t i n t h e

( c h e c k

d i s c h a r g e a n d i n t a k e p o r t

- S e a l i n g o n c o n n e c t i n g p a r t s .

r e l a t e d p a r t s i f p r o b l e m


r e f r i g e r a t o r c o m p a r t m e n t .

a r e c l o g g e d ) .

- C h e c k

t h e d a m p e r a n d r e p l a c e

i s c a u

s e d b y f a u l t y

- D a m p e r i c i n g .

- S e a l i n g i s n o t g o o d .

- C h e c k

i c i n g o n t h e s u r f a c e o f

i t i f i t h

a s d e f e c t s .

d e f r o s t i n g .

- P i p e i c i n g .

- T o o m

u c h f o o d i s s t o r e d a n d c l o g s

b a f f l e a n d c o o l a i r p a t h ( p i p e ) a f t e r

- C h e c k

d e f r o s t . ( A f t e r f o r c e d

- D i s c h a r g i n g

t h e d i s

c h a r g e p o r t .

d i s s e m

b l i n g t h e c o n t a i n e r b o x .

d e f r o s t i n g , c h e c k i c e i n t h e

p i p e i c i n g .

- B a d d e f r o s t i n g .

- C h e c k

i c i n g a t i n t a k e p o r t s o f

e v a p o r a t o r a n d p i p e s . )

f r e e z e r a n d r e f r i g e r a t o r

c o m p a

r t m e n t .

2 ) F a u l t y

d o o r o r r e f r i g e r a t o r

- C h e c k

g a s k e t a t t a c h e d c o n d i t i o n s .

- C o r r e c

t t h e g a s k e t a t t a c h m e n t

- R e p l a

c e m e n t s h o u l d


- C h e c k

d o o r a s s e m b l y c o n d i t i o n s .

c o n d i t i o n s a n d r e p l a c e i t .

b e d o n e w h e n i t

- F a u l t y

g a s k e t .

- D o o r a

s s e m b l y a n d r e p l a c e m e n t .

c a n n o

t b e r e p a i r e d .

- F a u l t y

a s s e m b l y .

3 ) O v e r c

o o l i n g i n t h e r e f r i g e r a t o r

- C h e c k

r e f r i g e r a t o r c o m p a r t m e n t

- R e p l a c e f a u l t y p a r t s .


i s o v e r

c o o l e d ( w h e n b u t t o n

- F a u l t y

d a m p e r i n t h e r e f r i g e r a t o r

p r e s s e

d o n w e a k ) .


- C h e c k

p a r t s a r e f a u l t y .

- F a u l t y

M I C O M ( f a u l t y s e n s o r )

4 ) B a d d

e f r o s t i n g

- C h e c k

f r o s t o n t h e e v a p o r a t o r

- C h e c k

p a r t s r e l a t e d t o d e f r o s t i n g .

- M o i s t u r e d o e s n o t f r e e z e

- H e a t e

r w i r e i s c u t .

a f t e r d i s s e m b l i n g s h r o u d a n d f a n

- C h e c k

d e f r o s t i n g . ( C h e c k i c e o n t h e

o n t h e

e v a p o r a t o r b u t

- D e f e c

t i v e d e f r o s t s e n s o r .

g r i l l e .

e v a p o r a t o r a n d p i p e . )

c a n b e s u c k e d i n t o t h e

- D e f r o s i n g c y c l e .

- C h e c k

i c e o n i n t a k e p o r t o f f r e e z e r

r e f r i g e r a t o r , w h e r e i t

a n d r e f r i g e r a t o r c o m p a r t m e n t .

c o n d e

n s e s a n d f r e e z e s .

T h i s i n t e r f e r e s w i t h c o l d

a i r c i r c u l a t i o n a n d

s u b l i m

a t i o n o f t h e i c e .

5 ) C u s t o

m e r s a r e n o t f a m i l i a r w i t h

- C h e c k

f o o d i n t e r f e r e s w i t h d o o r


t h i s m

a c h i n e .

c l o s i n g

.

- D o o r o p e n s .

- C h e c k

i c e o n t h e c e i l i n g s .

- H i g h t e m p e r a t u r e , h i g h m o i s t u r e ,

a n d h i g h l o a d .



TROUBLE DIAGNOSIS

- 115 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

I c e i n t h e f r e e z e r 1 ) B a d c

o o l i n g a i r c i r c u l a t i o n .

- C h e c k

f o o d s t o r a g e c o n d i t i o n s


- C h e c k t h e p a r t s r e l a t e d


- I n t a k e p o r t i s c l o g g e d i n t h e f r e e z e r

v i s u a l l y . ( C h e c k c l o g g i n g a t i n t a k e

- C h e c k

d e f r o s t ( C h e c k i c e o n t h e

t o d e f r o s t i n g i f t h e

- S u r f a c e o f f a n


a n d d i s c h a r g i n g p o r t o f c o o l i n g a i r . )

e v a p o r a t o r a n d p i p e s a f t e r f o r c e d

p r o b l e

m i s c a u s e d b y

g r i l l e .

- D i s c h a r g i n g p o r t i s C l o g g e d .

- C h e c k

f o o d o c c u p a t i o n r a t i o i n

d e f r o s t i n g ) .

t h e f a u l t y d e f r o s t i n g .

- W a l l o f f r e e z e r - T o o m u

c h f o o d i s s t o r e d .

v o l u m

e ( L e s s t h a n 7 5 % ) .


- B a d d e

f r o s t i n g .

- C h e c k

f r o s t o n t h e e v a p o r a t o r a f t e r

- C o o l a i r

d i s s e m

b l i n g s h r o u d a n d f a n g r i l l e .

d i s c h a r g i n g p o r t .

- C h e c k

i c i n g a t i n t a k e p o r t o f

- B a s k e t ( r a c k )

r e f r i g e

r a t o r c o m p a r t m e n t .

a r e a .

- F o o d s u r f a c e .

2 ) B a d f r e e z e r c o m p a r t m e n t d o o r

- C h e c k

g a s k e t a t t a c h m e n t

- C o r r e c

t t h e g a s k e t a t t a c h e m e n t

- R e p l a

c e w h e n i t c a n n o t

- I c i n g i n t h e

- F a u l t y g a s k e t

c o n d i t

i o n s .

c o n d i t i o n s a n d r e p l a c e i t .

b e r e p a i r e d .

s h u t e .

- F a u l t y a s s e m b l y

- C h e c k

d o o r a s s e m b l y c o n d i t i o n s .

- D o o r a

s s e m b l y a n d r e p l a c e m e n t .

3 ) O v e r

f r e e z i n g i n t h e f r e e z e r

- R e f r i g e r a t o r o p e r a t e s p u l l d o w n .

- R e p l a c

e d e f e c t i v e p a r t s .


( C h e c

k i f i t i s o p e r a t e d

- F a u l t y

M I C O M .

i n t e r m i t t e n t l y )

- T h e T e

m p e r a t u r e o f f r e e z e r

c o m p a

r t m e n t i s s a t i s f a c t o r y , b u t

o v e r f r e e z i n g h a p p e n s i n t h e

r e f r i g e r a t o r c o m p a r t m e n t e v e n

t h o u g h

t h e n o t c h i s s e t a t w e a k .

4 ) B a d d

e f r o s t i n g .

- C h e c k

f r o s t o n t h e e v a p o r a t o r a f t e r

- C h e c k

p a r t s r e l a t e d t o d e f r o s t i n g .

- H e a t e r

w i r e i s c u t .

d i s s e m

b l i n g s h r o u d a n d g r i l l e .

- C h e c k

d e f r o s t i n g . C h e c k i c e o n t h e

- F a u l t y d e f r o s t s e n s o r .

- C h e c k

i c e o n t h e i n t a k e p o r t i n t h e

e v a p o r a t o r a n d p i p e s a f t e r f o r c e d

- D e f r o s t i n g c y c l e

r e f r i g e

r a t o r c o m p a r t m e n t .

d e f r o s t i n g .

5 ) U s e r i s n o t f a m i l i a r w i t h h o w t o

- C h e c k

f o o d h o l d s d o o r o p e n .


u s e .

- C h e c k

i c e o n t h e i c e t r a y .

- D o o r o p e n s .

- H i g h m

o i s t u r e f o o d w a t e r i s s t o r e d .



2 - 7 .

S o u n d

TROUBLE DIAGNOSIS

- 116 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

H i s s s o u n d

1 . L o u d s o u n d o f c o m p r e s s o r

1 . 1 C h e

c k t h e l e v e l o f t h e

1 ) M a i n t a i n h o r i z o n t a l l e v e l .

o p e r a t i o n .

r e f r i g e r a t o r .

2 ) R e p l a c e b u s h i n g a n d s e a t i f t h e y

1 . 2 C h e

c k t h e b u s h i n g s e a t

a r e s a g g e d a n d a g e d .

c o n d i t i o n s ( s a g g i n g a n d a g i n g ) .

3 ) T o u c h t h e p i p i n g a t v a r i o u s p l a c e

a l o n g

i t s r o u t e . I n s t a l l a d a m p e r a t

2 . P i p e s

r e s o n a t e s o u n d w h i c h i s

2 . 1 C h e

c k t h e l e v e l o f p i p e s

t h e p o i n t w h e r e y o u r t u c h r e d u c e s

c o n n e

c t e d t o t h e c o m p r e s s o r .

c o n n e c t e d t o t h e c o m p r e s s o r

t h e n o i s e .

a n d

t h e i r i n t e r f e r e n c e .

4 ) A v o i d

p i p e i n t e r f e r e n c e .

2 . 2 C h e

c k b u s h i n g i n s e r t i n g

5 ) R e p l a c e d e f e c t i v e f a n a n d f a n

c o n d i t i o n s i n p i p e s .

m o t o r .

2 . 3 T o u c h p i p e s w i t h h a n d s o r s c r e w

6 ) A d j u s t f a n t o b e i n t h e c e n t e r o f

- d r i v

e r ( c h e c k t h e c h a n g e o f

t h e f a

n g u i d e .

s o u n d ) .

7 ) L e a v e a c l e a r a n c e b e t w e e n

i n t e r f e r i n g p a r t s a n d s e a l g a p s i n

3 . F a n o p e r a t i o n s o u n d i n t h e f r e e z e r 3 . 1 C h e

c k f a n i n s e r t i o n d e p t h a n d

t h e s t r u c t u r e s .


b l a d

e d a m a g e .

8 ) R e a s

s e m b l e t h e p a r t s w h i c h m a k e

3 . 2 C h e

c k t h e i n t e r f e r e n c e w i t h

s o u n d .

s t r u c t u r e s .

9 ) L e a v e a c l e a r a n c e i f e v a p o r a t o r

3 . 3 C h e

c k f a n m o t o r .

p i p e s

a n d s u c t i o n p i p e t o u c h

3 . 4 C h e

c k f a n m o t o r b u s h i n g

f r e e z e r s h r o u d .

i n s e

r t i o n a n d a g i n g c o n d i t i o n s .

4 . F a n o p e r a t i o n s o u n d i n t h e

4 . 1 S a m

e a s f a n c o n f i r m a t i o n i n t h e

c o m p r e s s o r c o m p a r t m e n t .

r e f r i g e r a t o r .

4 . 2 C h e

c k d r i p t r a y l e g i n s e r t i o n .

4 . 3 C h e

c k t h e s c r e w f a s t e n i n g

c o n d i t i o n s a t c o n d e n s e r a n d

d r i p

t r a y .



TROUBLE DIAGNOSIS

- 117 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

V i b r a t i o n s o u n d . 1 . V i b r a t

i o n o f s h e l v e s a n d f o o d s i n

1 - 1 . R e m o v e a n d r e p l a c e t h e

1 ) R e a s

s e m b l e t h e v i b r a t i n g p a r t s

C l a c k .

t h e r e f r i g e r a t o r .

s h e

l v e s i n t h e r e f r i g e r a t o r

a n d i n s e r t f o a m o r c u s h i o n w h e r e

2 . P i p e s

i n t e r f e r e n c e a n d c a p i l l a r y

1 - 2 . C h e c k l i g h t f o o d a n d c o n t a i n e r

v i b r a t i o n i s s e v e r e .

t u b e t o u c h i n g i n t h e c o m p r e s s o r .

o n t h e s h e l v e s .

2 ) L e a v e a c l e a r a n c e w h e r e p a r t s


2 - 1 . T o u

c h p i p e s i n t h e c o m p r e s s o r

i n t e r f e r e w i t h e a c h o t h e r .

3 . C o m p

r e s s o r s t o p p e r v i b r a t i o n .

c o m

p a r t m e n t w i t h h a n d s .

3 ) R e d u

c e v i b r a t i o n w i t h b u s h i n g

4 . M o v i n

g w h e e l v i b r a t i o n .

2 - 2 . C h e c k c a p i l l a r y t u b e t o u c h e s

a n d r e s t r a i n e r i f i t i s s e v e r e .

5 . O t h e r

s t r u c t u r e a n d p a r t s

c o v

e r b a c k .

( e s p e

c i a l l y c o m p r e s s o r a n d p i p e ) .

v i b r a t i o n .

3 - 1 . C h e c k c o m p r e s s o r s t o p p e r

4 ) R e p l a c e c o m p r e s s o r s t o p p e r i f i t

v i b r

a t i o n .

v i b t a t e s s e v e r e l y .

4 - 1 . C h e c k v i b r a t i o n o f f r o n t a n d r e a r

m o v i n g w h e e l s .

5 - 1 . T o u

c h o t h e r s t r u c t u r e s a n d p a r t s .

I r r e g u l a r s o u n d . 1 . I t i s c a

u s e d b y h e a t e x p a n s i o n

1 - 1 C h e

c k t i m e a n d p l a c e o f s o u n d

1 ) E x p l a

i n t h e p r i n c i p l e s o f r e f r i g e r a t i o n

C l i c k .

a n d c o n t r a c t i o n o f e v a p o r a t o r ,

s o u r c e s .

a n d t h a t t h e t e m p e r a t u r e d i f f e r e n c e

s h e l v e

s , a n d p i p e s i n t h e

b e t w e

e n o p e r a t i o n a n d d e f r o s t i n g

r e f r i g e

r a t o r .

c a n m

a k e s o u n d s .

2 ) I f e v a p o r a t o r p i p e c o n t a c t s w i t h o t h e r

s t r u c t u r e s ,

l e a v e a c l e a r a n c e b e t w e e n

t h e m ( f r e e z e r s h r o u d o r i n n e r c a s e ) .



TROUBLE DIAGNOSIS

- 118 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

S o u n d P o p p i n g

I t h a p p e n s w h e n r e f r i g e r a n t e x p a n d s

- C h e c k t h e s o u n d o f r e f r i g e r a n t a t t h e

- C h e c k t h e r e s t r a i n e r a t t a c h e d o n t h e

( a l m o s t t h e s a m e

a t t h e e n d o f c a p i l l a r y t u b e .

i n i t i a l i n

s t a l l a t i o n .

e v a p o r a t o r a n d c a p i l l a r y t u b e w e l d

a s a n i m a l ’ s c r y i n g

- C h e c k t h e s o u n d w h e n t h e r e f r i g e r a t o r

j o i n t s a n d a t t a c h a n o t h e r r e s t r a i n e r .

s o u n d ) .

s t a r t s o p e r a t i o n a f t e r f o r c e d d e f r o s t i n g .

- I f i t i s c o n t i n u o u s a n d s e r v e r e ,

i n s e r t

- C h e c k t h e r e s t r a i n e r a t t a c h m e n t

c a p i l l a r y t u b e a g a i n ( d e p t h 1 5 ± 3 m m )

c o n d i t i o

n s o n t h e e v a p o r a t o r a n d

- F a s t e n

t h e c a p i l l a r y t u b e t o s u c t i o n

c a p i l l a r y t u b e w e l d j o i n t s .

p i p e s o

r d e t a c h i n t h e c o m p r e s s o r


- E x p l a i n

t h e p r i n c i p l e s o f f r e e z i n g

c y c l e s .

W a t e r b o i l i n g o r

I t h a p p e n

s w h e n r e f r i g e r a n t p a s s e s

- C h e c k t h e s o u n d w h e n c o m p r e s s o r i s

- E x p l a i n

t h e p r i n c i p l e s o f f r e e z i n g c y c l e s

f l o w i n g s o u n d .

o r i f i c e i n a c c u m u l a t o r i n t e r n a l p i p e s b y

t u r n e d o n .

a n d r e f r i g e r a n t f l o w i n g p h e n o m e n o n b y

t h e p r e s s u r e d i f f e r e n c e b e t w e e n

- C h e c k t h e s o u n d w h e n c o m p r e s s o r i s

i n t e r n a l p r e s s u r e d i f f e r e n c e .

c o n d e n s e

r a n d e v a p o r a t o r .

t u r n e d o f f .

- I f s o u n d i s s e r v e r e , w r a p t h e

a c c u m u

l a t o r w i t h f o a m a n d r e s t r a i n e r .

S o u n d o f w h i s t l e

W h e n d o o r c l o s e s ,

t h e i n t e r n a l p r e s s u r e

- C h e c k t h e s o u n d b y o p e n i n g a n d

- B r o a d e

n t h e c a p o f d i s c h a r g e h o s e f o r

w h e n d o o r

o f t h e r e f r i g e r a t o r d e c r e a s e s s h a r p l y

c l o s i n g

t h e r e f r i g e r a t o r o r f r e e z e r d o o r s .

d e f r o s t i n g i n t h e c o m p r e s s o r

c l o s e s .

b e l o w a t o

m o s p h e r e a n d s u c k s a i r i n t o


t h e r e f r i g e r a t o r , m a k i n g t h e w h i s t l e

- S e a l t h e g a p w i t h s e a l a n t b e t w e e n o u t

s o u n d .

a n d i n n

e r c a s e s o f h i n g e i n d o o r .



2 - 8 .

O d o r

TROUBLE DIAGNOSIS

- 119 -

P r o b l e m s

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

F o o d O d o r .

F o o d ( g a

r l i c , k i m c h i , e t c )

- C h e c k

t h e f o o d i s n o t w r a p p e d .

- D r y t h e d e o d o r i z e r i n a s u n n y p l a c e

- C h e c k

t h e s h e l v e s o r i n n e r

w i t h a

d e q u a t e v e n t i l a t i o n .

w a l l a r e s t a i n e d w i t h f o o d j u i c e .

- S t o r e t h e f o o d i n t h e c l o s e d

- B e s u r

e f o o d i s s e c u r e l y c o v e r e d

c o n t a i n e r i n s t e a d o f v i n y l w r a p s .

w i t h p l a s t i c w r a p .

- C l e a n

t h e r e f r i g e r a t o r a n d s e t

- C h e d k

f o o d c l e a n l i n e s s .

b u t t o n

a t s t r o n g .

P l a s t i c O d o r .

O d o r s o f m i x e d f o o d a n d p l a s t i c

- C h e c k

w e t f o o d i s w r a p p e d w i t h

- C l e a n

t h e r e f r i g e r a t o r .

o d o r s .

p l a s t i c

b o w l a n d b a g .

- P e r s u a d e c u s t o m e r s n o t t o u s e

- I t h a p p

e n s i n t h e n e w r e f r i g e r a t o r .

p l a s t i c b a g o r w r a p s w i t h w e t f o o d

o r o d o

r o u s f o o d s .

O d o r f r o m t h e

O d o r f r o m t h e o l d d e o d o r i z e r .

- C h e c k

t h e d e o d o r i z e r o d o r s .

- D r y t h e d e o d o r i z e r w i t h d r y e r a n d

* D e o d o

r i z e r : o p t i o n

d e o d o r i z e r .

t h e n i n t h e s h i n y a n d w i n d y p l a c e .

- R e m o v e a n d r e p l a c e t h e

d e o d o r a n t s .



2 - 9 .

M I C O M

TROUBLE DIAGNOSIS

- 120 -

P r o b l e m s

S y m p t o m

C a u s e s

C h e c

k s

M e a s u r e s

R e m a r k s

B a d P C B

A l l d i s p l a

y

B a d c o n n e c t i o n

B a d c o n n e c t o r

V i s u a l c h e c k o n c o n n e c t o r

R e c o n n e c t

e l e c t r i c p o w e r .

L C D a r e

o f f .

b e t w e e n M a i n P C B

c o n n

e c t i o n f r o m m a i n

c o n n e c t i o n .

c o n n e c t o r .

a n d d i s p l a y c i r c u i t .

P C B

t o d i s p l a y P C B .

D e f e c t i v e P C B

P C B

t r a n s f o r m e r

C h e c k r e s i s t a n c e

o f P C B

R e p l a c e P C B

A p p l i c a b l e t o

t r a n s f o r m e r .

w i n d i n g i s c u t .

t r a n s f o r m e r i n p u t a n d o u t p u t

t r a n s f o r m e r o r P C B .

m o d e l w i t h o u t

P C B

t r a n s f o r m e r

t e r m i n a l s w i t h a t

e s t e r .

d i s p e n s e r .

t e m p

e r a t u r e f u s e i s

( I f r e s i s t a n c e i s i n

f i n i t y , t r a n s

b u r n t o u t .

w i n d i n g i s c u t ) .

D e f e c t i v e P C B e l e c t r i c

D e f e c t i v e r e g u l a t o r I C

C h e c k v o l t a g e a t

i n p u t / o u t p u t

R e p l a c e r e g u l a t o r .

R e f e r t o e l e c t r i c

c i r c u i t p a r t s .

( 7 8 1 2 , 7 8 0 5 ) .

t e r m i n a l s .

c i r c u i t i n c i r c u i t

e x p l a n a t i o n .

P C B

e l e c t r i c t e r m i n a l

C h e c k f u s e i n P C

B e l e c t r i c

R e p l a c e P C B f u s e .

f u s e

i s b u r n e d o u t .

t e r m i n a l w i t h a t e

s t e r .

S T R

P a r t s a r e

C h e c k i f S T R N o . 2 a n d 3 p i n s

R e p l a c e p a r t s .

A p p l i c a b l e t o

d a m a g e d .

a r e c u t w h e n p o w

e r i s o f f .

m o d e l w i t h

d i s p e n s e r .

A b n o r m a

l

B a d c o n n e c t i o n

L e a d

W i r e c o n n e c t i n g

C h e c k L e a d W i r e

t e r m i n a l s

R e c o n n e c t L e a d

d i s p l a y L

C D

b e t w e e n M a i n P C B

m a i n

P C B a n d d i s p l a y

c o n n e c t i n g M a i n

P C B a n d

W i r e a n d d i r e c t l y

o p e r a t i o n

a n d d i s p l a y c i r c u i t .

P C B

i s c u t o r c o n n e c t o r

d i s p l a y P C B w i t h

a t e s t e r .

c o n n e c t d e f e c t i v e

t e r m i n a l c o n n e c t i o n i s

c o n t a c t t e r m i n a l t o

b a d .

L e a d W i r e .

D e f e c t i v e L C D .

D e f e c t i v e L C D .

C h e c k i f a l l L C D a r e o n w h e n

R e p l a c e d i s p l a y

R e f e r t o d i s p l a y

M a i n P C B T e s t s

w i t c h i s

P C B .


p r e s s e d ( o r w h e n

b o t h f r e e z e r


k e y a n d p o w e r f r e e z e r k e y a r e

p r e s s e d a t t h e s a

m e t i m e f o r

m o r e t h a n o n e s e

c o n d . )



TROUBLE DIAGNOSIS

- 121 -

P r o b l e m s

S y m p t o m

C a u s e s

C h e c

k s

M e a s u r e s

R e m a r k s

B a d c o o l i n g .

F r e e z e r

C o m p r e s s o r d o e s

C o m p r e s s o r L e a d W i r e

C h e c k c o m p r e s s o r L e a d W i r e


t e m p e r a t u r e i s

n o t s t a r t .

i s c u

t .

w i t h a t e s t e r .

W i r e .

h i g h .

D e f e c t i v e c o m p r e s s o r

M e a s u r e v o l t a g e

a t P C B C O N 2

R e p l a c e r e l a y R Y 1

R e f e r t o l o a d

d r i v i n

g r e l a y .

( 3 & 9 ) a f t e r p r e s s i n g m a i n P C B

a n d R Y 2 o r P C B .

d r i v i n g c i r c u i t i n

t e s t s w i t c h o n c e .

I t i s O K i f

c i r c u i t

v o l t a g e i s n o r m a l .


D e f e c t i v e f r e e z e r

D e f e c t i v e F r e e z e r

C h e c k r e s i s t a n c e

o f f r e e z e r

R e p l a c e f r e e z e r

R e f e r t o

s e n s o r .

s e n s o r p a r t s .

s e n s o r w i t h a t e s

t e r .

s e n s o r .

r e s i s t a n c e

c h a r a c t e r i s t i c s

t a b l e o f s e n s o r i n

c i r c u i t . R e f e r t o

t a b l e s o n p a g e s

3 9 ~ 4 2

T h e w r o n g s e n s o r

C o n f i r m t h e c o l o r o f s e n s o r i n

R e p a i r m a i n P C B


h a s b

e e n i n s t a l l e d .

c i r c u i t s ( m a i n P C

B s e n s o r

s e n s o r h o u s i n g

O r d e

r b y m o d e l n u m b e r

h o u s i n g ) .

a n d p a r t n u m b e r .

D e f e c t i v e f r e e z e r f a n

F a n m o t o r l e a d w i r e

C h e c k f a n m o t o r

l e a d w i r e

R e c o n n e c t l e a d

m o t o r .

i s c u t .


w i r e .

• D e f

e c t i v e d o o r s w i t c h

M e a s u r e t h e v o l t a g e b e t w e e n

• R e p l a c e d o o r


( f r e e z e r , r e f r i g e r a t o r ,

P C B p o w e r b l u e

l i n e a n d f a n

s w i t c h ( f r e e z e r ,

d r i v i n g c i r c u i t s i n

h o m e b a r ) .

m o t o r a f t e r p r e s s

i n g t e s t s w i t c h

r e f r i g e r a t o r , a n d

c i r c u i t

• D e f

e c t i v e f a n m o t o r .

o f M a i n P C B . I f t h e v o l t a g e i s

h o m e b a r ) .


• D e f

e c t i v e f a n m o t o r

n o r m a l , i t i s O K .

• R e p l a c e f a n m o t o r .

d r i v

i n g r e l a y .

• R e p l a c e r e l a y R Y 5

& R Y 6 o r P C B .

F a u l t y d e f r o s t .

R e f e r t o f a u l t y d e

f r o s t i t e m s i n t r o u b l e d i a g n o s i s

R e f e r t o t r o u b l e

f u n c t i o n s .

d i a g n o s i s

f u n c t i o n .



TROUBLE DIAGNOSIS

- 122 -

P r o b l e m s

S y m p t o m

C a u s e s

C h e c

k s

M e a s u r e s

R e m a r k s

B a d c o o l i n g

W r o n g

D e f e c t i v e S t e p M o t o r

C h e c

k S t e p M o t o r

C h e c k i f S t e p M o

t o r d a m p e r


R e f r i g e r a

t o r

D a m p e r .

d a m p e r m o t o r a n d

m o t o r a n d r e e d s

w i t c h l e a d

w i r e .

t e m p e r a t u r e .

r e e d

s w i t c h a n d l e a d

w i r e a r e c u t w i t h

a t e s t e r .

w i r e a r e c u t . C h e c k

R e f e r t o S t e p M o

t o r d a m p e r

R e p l a c e S t e p M o t o r

S t e p

M o t o r d a m p e r

i n p a r t s r e p a i r g u

i d e .

d a m p e r o r r e f r i g e r a t o r

p a r t .

c o n t r o l b o x A s s e m b l y .

C h e c

k S t e p M o t o r

R e f e r t o S t e p M o

t o r d a m p e r

R e p l a c e r e l a y o r

R e f e r t o s i n g l e

d a m p e r M o t o r d r i v i n g

i n p a r t s r e p a i r g u

i d e .

P C B .

m o t o r d a m p e r

r e l a y

i n P C B .

d r i v i n g c i r c u i t s

i n c i r c u i t


F o r e i g n m a t e r i a l s i n S t e p

C h e c k S t e p M o t o

r d a m p e r

R e m o v e f o r e i g n

M o t o

r d a m p e r b a f f l e s .

b a f f l e v i s u a l l y .

m a t e r i a l s .

I c e f o

r m a t i o n o n

C h e c k i f S t e p M o

t o r d a m p e r

R e p l a c e S t e p M o t o r

S t e p

M o t o r d a m p e r

H e a t e r w i r e i s c u t w i t h a

d a m p e r o r r e f r i g e r a t o r

b a f f l e

s .

t e s t e r .

c o n t r o l B o x A s s e m b l y .

D e f e c t i v e r e f r i g e r a t o r


C h e c k t h e r e s i s t a

n c e o f

R e p l a c e r e f r i g e r a t o r

R e f e r t o s e n s o r

s e n s o r

s e n s o r p a r t s .

r e f r i g e r a t o r s e n s o r w i t h a t e s t e r . s e n s o r .

r e s i s t a n c e

c h a r a c t e r i s t i c

t a b l e i n c i r c u i t


R e f r i g e r a t o r s e n s o r i s

C h e c k t h e s e n s o r c o l o r i n t h e

R e p a i r m a i n P C B

s u b s t i t u t e d f o r o t h e r

c i r c u i t . ( m a i n P C B s e n s o r

s e n s o r h o u s i n g .

s e n s o r .

h o u s i n g . )


C h e c k i f r e f r i g e r a

t o r s e n s o r

F i x a g a i n t h e

s e n s o r a s s e m b l y

i s n o t f i x e d a t c o v

e r s e n s o r b u t

r e f r i g e r a t o r s e n s o r .

c o n d

i t i o n .

i n n e r c a s e v i s u a l l y .



TROUBLE DIAGNOSIS

- 123 -

P r o b l e m s

S y m p t o m

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

B a d d e f r o s t .

D e f r o s t i s n o t

D e f r o s t l e a d w i r e i s c u t .

C h e c k i f d e f r o s t l e a d w i r e

i s c u t w i t h a


w o r k i n g .

t e s t e r .

W i r e .

D e f e c t i v e d e f r o s t d r i v i n g r e l a y

.

C h e c k t h e v o l t a g e o f C O N

2 ( 1 a n d 7 )

R e p l a c e r e l a y ( R Y 7


w i t h a t e s t e r a f t e r p r e s s i n g m a i n

a n d R Y 3 ) o r P C B .

d r i v i n g c o n d i t i o n s

P C B t e s t s w i t c h t w i c e .

c h e c k i n c i r c u i t

I f t h e v o l t a g e i s n o r m a l t h e n i t i s O K .


D e f e c t i v e d e f r o s t s e n s o r p a r t s

.

C h e c k t h e r e s i s t a n c e o f d e f r o s t s e n s o r

R e p l a c e d e f r o s t

R e f e r t o s e n s o r


s e n s o r .

r e s i s t a n c e

c h a r a c t e r i s t i c

t a b l e o f c i r c u i t


D e f e c t i v e

B u z z e r

D e f e c t i v e c o n n e c t i n g l e a d w i r e f r o m

C h e c k l e a d w i r e r e l a t e d t o

d o o r

R e p a i r l e a d w i r e .

b u z z e r

c o n t i n u o u s l y

m a i n P C B t o d o o r s w i t c h .

s w i t c h w i t h a t e s t e r .

r i n g s o r d o o r

D e f e c t i v e d o o r s w i t c h p a r t s .

R e f e r t o d o o r s w i t c h i n p a

r t s r e p a i r

R e p l a c e d o o r s w i t c h .

o p e n i n g a l a r m

g u i d e .

d o e s n o t

w o r k .

D e f e c t i v e

B u z z e r d

o e s

K e y i n p u t w i r e i s c u t o r b a d c o

n n e c t o r

C h e c k i n p u t w i r e w i t h a t e

s t e r .


R e f e r t o d i s p l a y

d i s p l a y b u t t o n

n o t s o u n d

t e r m i n a l c o n t a c t i n m a i n P C B

a n d

w i r e a n d r e p l a c e o r


a n d b u t t o n s

d i s p l a y P C B c o n n e c t i n g l e a d w i r e .

d i r e c t l y c o n n e c t b a d


d o n o t

c o n t a c t t e r m i n a l t o

o p e r a t e .

l e a d w i r e .

K e y i s c o n t i n u o u s l y d e p r e s s e d d u e t o

D i s a s s e m b l e f r a m e d i s p l a

y a n d c o n f i r m

A d j u s t o r r e p l a c e

s t r u c t u r a l i n t e r f e r e n c e .

v i s u a l l y .

i n t e r f e r i n g

s t r u c t u r e s .



TROUBLE DIAGNOSIS

- 124 -

P r o b l e m s

S y m p t o m

C a u s e s

C h e c k s

M e a s u r e s

R e m a r k s

D e f e c t i v e

B u z z e r d

o e s

T r o u b l e m o d e i n d i c a t i o n .

C h e c k t r o u b l e d i a g n o s i s f u n c t i o n .

R e p a i r t r o u b l e s

R e f e r t o m o d e

d i s p l a y b u t t o n .

n o t s o u n d

i n d i c a t i o n i n

a n d b u t t o n s

f u n c t i o n

d o n o t o p e r a t e .

e x p l a n a t i o n s .

D o o r B u z z e r

B u z z e r


C h e c k l e a d w i r e a s s o c i a t e d w i t h d o o r


C h e c k m o d e l

c o n t i n u o u s l y

m a i n P C B t o d o o r s w i t c h .

s w i t c h .

w i t h d i s p e n s e r .

r i n g s o r d o o r

D e f e c t i v e f r e e z e r c o m p a r t m e n t d o o r


r t s r e p a i r

R e p l a c e F r e e z e r

o p e n i n g a l a r m

s w i t c h p a r t s .

g u i d e .

c o m p a r t m e n t d o o r

d o e s n o t

w o r k .

s w i t c h .

B a d w a t e r / i c e

I c e a n d w

a t e r


C h e c k L e a d W i r e a s s o c i a

t e d w i t h l e v e r


d i s p e n s e r .

a r e n o t

M a i n P C B t o l e v e r s w i t c h .

s w i t c h w i t h a t e s t e r .

d i s p e n s e

d .

D e f e c t i v e l e v e r s w i t c h p a r t s


r t s r e p a i r g u i d e . R e p l a c e l e v e r s w i t c h .

D e f e c t i v e p h o t o c o u p l e r I C p a

r t s .

C h e c k v o l t a g e c h a n g e a t p h o t o c o u p l e r

R e p l a c e p h o t o

o u t p u t t e r m i n a l s w i t h l e v e r s w i t c h

c o u p l e r I C o r P C B .

p r e s s e d . I t i s O K i f v o l t a g e c h a n g e i s

b e t w e e n 0 V - 5 V .

D e f e c t i v e r e l a y a s s o c i a t e d w i t h i c e

C h e c k r e l a y ( R Y 4 , R Y 5 , R

Y 1 2 )

R e p l a c e d e f e c t i v e

d i s p e n s e r ( g e a r e d m o t o r , c u b

e , a n d


r e l a y .

d i s p e n s e r s o l e n o i d ) .

D e f e c t i v e p a r t s a s s o c i a t e d w i t h i c e

C h e c k r e s i s t a n c e o f p a r t s



d i s p e n s e r ( g e a r e d m o t o r , c u b

e , a n d

p a r t s .

d i s p e n s e r s o l e n o i d ) .

D e f e c t i v e r e l a y a s s o c i a t e d w i t h w a t e r

C h e c k r e l a y ( R Y 7 ) w i t h a

t e s t e r


d i s p e n s e r .

r e l a y .

D e f e c t i v e p a r t s a s s o c i a t e d w i t h w a t e r

C h e c k r e s i s t a n c e o f p a r t s



d i s p e n s e r .

p a r t s .



3. Sealed System Heavy Repair

3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant

TROUBLE DIAGNOSIS

- 125 -

NO. Items Unit Standards Purposes Remarks

1 Pipe and piping Min. Pipe:within 1 hour. To protect The opening time should be reduced to a

system opening time. Comp:within Moisture half of the standards during rain and10 minutes. Penetration. rainy seasons (the penetration of water

Drier:within into the pipe is dangerous).20 minutes.

2 Welding. Nitrogen Weld under To protect - Refer to repair note in each part.Pressure. Nitrogen oxide scale - R134a refrigerant is more susceptible to

atmosphere formation. leaks than R12 and requires more care(N2 pressure: during welding.0.1~0.2 kg/cm2) - Do not apply force to pipes before and

after welding to protect pipe fromcracking.

3 N2 sealed parts. Confirm N2 Confirm air leaking To protect - In case of evaporator parts, if it doesn'tleak. sounds when moisture make noise when removing bushing

removing bushing penetration. cap blow dry air or N2 gas for more thancap. 1 min use the parts.

Sound: usableNo sound: not usable

4 Refrigeration Evacuation Min. More than To removeCycle. time 40 minutes. moisture.

Vacuum Torr Below 0.5 (ref) Note:Only applicable to the modeldegree equipped with reverse flow protect

plate.

Vacuum EA High and low Vaccum efficiency can be improved byPressure sides are operating compressor during evacuation.evacuated at thesame time formodels above 200 L

Vacuum EA Use R134a To protect The bushing pipes for R12 refrigerant shallpiping exclusive mixing of be melted when they are used for R134a

manifold. mineral and refrigerant causes of leak.ester oils.

Pipe EA Use R134a To protectcoupler cxclusive. R12 Refri-

gerant mixing.

Outlet R134a exclusive.(Socket)

Plug R134a exclusive

5 Refrigerant weighing. EA Use R134a Do not mix - Do not weigh the refrigerant at too hot orexclusively. with R12 too cold an area. (25°C[77°F] is adequate.)Weighing refrigerant. - Use copper charging canisterallowance:±5g Socket: 2SV Plug: 2PV R134aNote:Winter:-5g Note : Do not burn O-ring (rubber) during

Summer:+5g welding.

6 Drier replacement. -Use R134a exclusively To removefor R134a refrigerator the moisture-Replace drier whenever from pipe.repairing refrigeratorcycle piping.

7 Leak check. -Do not use soapy Detect -Check oil leak at refrigerant leak area.water for check. refrigerant Use electronic leak detector if oil leak isIt may be sucked leak area. not found.into the pipe. -The electronic leak detector is very

sensitive to halogen gas in the air. It alsocan detect R141b in urethane. Pleasepractice therefore many times before use.



3-2. Summary Of Heavy Repair

TROUBLE DIAGNOSIS

- 126 -

Process Contents Tools

- Cut charging pipe ends and discharge refrigerant from Filter, side cutters

drier and compressor.

- Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N2 gas

- Confirm N2 sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere. (N2 gas pressure:

1.42-2.85 psi).

- Repair in a clean and dry place.

- Evacuate for more than forty minutes after connecting Vacuum pump R134a

manifold gauge hose and vacuum pump to high (drier) exclusively, Manifold gauge.and low (compressor refrigerant discharging parts)

pressure sides.

- Evacuation Speed:113 liters/minute.

- Weigh and control the allowance of R134a charging R134a exclusive charging canister

canister in a vacuum conditions to be ±0.176 oz with (mass cylinder), refrigerant

electronic scales and charge through compressor inlet R134a manifold gauge,

(Charge while compressor operates). electronic scales, pinch-off

- Weld carefully after pinching off the inlet pipe. plier, gas welding machine

- Check leak at weld joints. Electronic Leak Detector,

Minute leak : Use electronic leak detector Driver (Ruler).

Big leak : Check visually.Note:Do not use soapy water for check.

- Check cooling capacity

➀ Check radiator manually to see if warm.

➁ Check hot line pipe manually to see if warm.

➂ Check frost formation on the whole surface of the

evaporator.

NOTE: Some tools should be reserved for use with

R134a exclusively. Tools and gauges used with

R134a should be kept clean and stored separately

from other tools to avoid cross- contamination

by other refrigerants and lubricants.

- Remove flux from the silver weld joints with soft brush Copper brush, Rag, Tool box

or wet rag. Flux may be the cause of corrosion and

leaks.

- Clean R134a exclusive tools and store them in a clean

tool box or in their place.

- Installation should be conducted in accordance with the

standard installation procedure. Leave space of more

than 5 cm (2 inches) from the wall for compressor

compartment cooling fan mounted model.

Troublediagnosis

Remove refrigerantResiduals

Parts

replacement

and welding

Compressor

compartment

and tools

arrangement

Transportationand

installation

Check

refrigerant leak

and cooling

capacity

Vacuum

Refrigerantcharging and

charginginlet welding



3-3. Precautions During Heavy Repair

TROUBLE DIAGNOSIS

- 127 -

Items Precautions

1. Use of tools. 1) Use special parts and tools for R134a.

2. Recovery of refrigerant. 1) Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off.

2) Install a piercing type valve on the high pressure line (drier side). Then use the appropriate

recovery equipment to recover the refrigerant from the system. When the refrigerant has

been recovered, install a piercing type valve on the low pressure side. IT IS IMPORTANT

TO OPEN THE SYSTEM IN THIS ORDER TO KEEP THE OIL FROM BEING FORCED OUT.

The use of piercing type valves will allow future servicing and eliminates the possibility of a

defective pinch off.

3. Replacement of drier. 1) Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant.

4. Nitrogen blowing 1) Use pressurized nitrogen to prevent oxidation inside the piping.

welding. (Nitrogen pressure : 1.42 - 2.85 psi)

5. Others. 1) Only nitrogen or R134a should be used when cleaning the inside of piping of the sealed

system.

2) Check leakage with an electronic leakage tester.

3) Be sure to use a pipe cutter when cutting pipes.

4) Be careful not the water let intrude into the inside of the cycle.

1

2

Compressor

Low pressure side Condenser

High pressure side

Drier

Evaporator

Hot Line



3. Sealed System Heavy Repair

3-1. The Heavy Repair Standards for Refrigerator with R134a Refrigerant

TROUBLE DIAGNOSIS

- 125 -

NO. Items Unit Standards Purposes Remarks

1 Pipe and piping Min. Pipe:within 1 hour. To protect The opening time should be reduced to a

system opening time. Comp:within Moisture half of the standards during rain and10 minutes. Penetration. rainy seasons (the penetration of water

Drier:within into the pipe is dangerous).20 minutes.

2 Welding. Nitrogen Weld under To protect - Refer to repair note in each part.Pressure. Nitrogen oxide scale - R134a refrigerant is more susceptible to

atmosphere formation. leaks than R12 and requires more care(N2 pressure: during welding.0.1~0.2 kg/cm2) - Do not apply force to pipes before and

after welding to protect pipe fromcracking.

3 N2 sealed parts. Confirm N2 Confirm air leaking To protect - In case of evaporator parts, if it doesn'tleak. sounds when moisture make noise when removing bushing

removing bushing penetration. cap blow dry air or N2 gas for more thancap. 1 min use the parts.

Sound: usableNo sound: not usable

4 Refrigeration Evacuation Min. More than To removeCycle. time 40 minutes. moisture.

Vacuum Torr Below 0.5 (ref) Note:Only applicable to the modeldegree equipped with reverse flow protect

plate.

Vacuum EA High and low Vaccum efficiency can be improved byPressure sides are operating compressor during evacuation.evacuated at thesame time formodels above 200

L

Vacuum EA Use R134a To protect The bushing pipes for R12 refrigerant shallpiping exclusive mixing of be melted when they are used for R134a

manifold. mineral and refrigerant causes of leak.ester oils.

Pipe EA Use R134a To protectcoupler cxclusive. R12 Refri-

gerant mixing.

Outlet R134a exclusive.(Socket)

Plug R134a exclusive

5 Refrigerant weighing. EA Use R134a Do not mix - Do not weigh the refrigerant at too hot orexclusively. with R12 too cold an area. (25°C[77°F] is adequate.)Weighing refrigerant. - Use copper charging canisterallowance:±5g Socket: 2SV Plug: 2PV R134aNote:Winter:-5g Note : Do not burn O-ring (rubber) during

Summer:+5g welding.

6 Drier replacement. -Use R134a exclusively To removefor R134a refrigerator the moisture-Replace drier whenever from pipe.repairing refrigeratorcycle piping.

7 Leak check. -Do not use soapy Detect -Check oil leak at refrigerant leak area.water for check. refrigerant Use electronic leak detector if oil leak isIt may be sucked leak area. not found.into the pipe. -The electronic leak detector is very

sensitive to halogen gas in the air. It alsocan detect R141b in urethane. Pleasepractice therefore many times before use.



3-2. Summary Of Heavy Repair

TROUBLE DIAGNOSIS

- 126 -

Process Contents Tools

- Cut charging pipe ends and discharge refrigerant from Filter, side cutters

drier and compressor.

- Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N2 gas

- Confirm N2 sealing and packing conditions before use.

Use good one for welding and assembly.

- Weld under nitrogen gas atmosphere. (N2 gas pressure:

1.42-2.85 psi).

- Repair in a clean and dry place.

- Evacuate for more than forty minutes after connecting Vacuum pump R134a

manifold gauge hose and vacuum pump to high (drier) exclusively, Manifold gauge.and low (compressor refrigerant discharging parts)

pressure sides.

- Evacuation Speed:113 liters/minute.

- Weigh and control the allowance of R134a charging R134a exclusive charging canister

canister in a vacuum conditions to be ±0.176 oz with (mass cylinder), refrigerant

electronic scales and charge through compressor inlet R134a manifold gauge,

(Charge while compressor operates). electronic scales, pinch-off

- Weld carefully after pinching off the inlet pipe. plier, gas welding machine

- Check leak at weld joints. Electronic Leak Detector,

Minute leak : Use electronic leak detector Driver (Ruler).

Big leak : Check visually.Note:Do not use soapy water for check.

- Check cooling capacity

➀ Check radiator manually to see if warm.

➁ Check hot line pipe manually to see if warm.

➂ Check frost formation on the whole surface of the

evaporator.

NOTE: Some tools should be reserved for use with

R134a exclusively. Tools and gauges used with

R134a should be kept clean and stored separately

from other tools to avoid cross- contamination

by other refrigerants and lubricants.

- Remove flux from the silver weld joints with soft brush Copper brush, Rag, Tool box

or wet rag. Flux may be the cause of corrosion and

leaks.

- Clean R134a exclusive tools and store them in a clean

tool box or in their place.

- Installation should be conducted in accordance with the

standard installation procedure. Leave space of more

than 5 cm (2 inches) from the wall for compressor

compartment cooling fan mounted model.

Troublediagnosis

Remove refrigerantResiduals

Parts

replacement

and welding

Compressor

compartment

and tools

arrangement

Transportationand

installation

Check

refrigerant leak

and cooling

capacity

Vacuum

Refrigerantcharging and

charginginlet welding



3-3. Precautions During Heavy Repair

TROUBLE DIAGNOSIS

- 127 -

Items Precautions

1. Use of tools. 1) Use special parts and tools for R134a.

2. Recovery of refrigerant. 1) Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off.







3. Replacement of drier. 1) Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant.

4. Nitrogen blowing 1) Use pressurized nitrogen to prevent oxidation inside the piping.

welding. (Nitrogen pressure : 1.42 - 2.85 psi)

5. Others. 1) Only nitrogen or R134a should be used when cleaning the inside of piping of the sealed

system.

2) Check leakage with an electronic leakage tester.

3) Be sure to use a pipe cutter when cutting pipes.

4) Be careful not the water let intrude into the inside of the cycle.

1

2

Compressor

Low pressure side Condenser

High pressure side

Drier

Evaporator

Hot Line



3-4. Practical Work For Heavy Repair

TROUBLE DIAGNOSIS

- 128 -

Items Precautions

1. Removal of residual

refrigerant.

1) Continue to recover the refrigerant for more than 5 minutes after turning the refrigerator off.







2. Nitrogen blowing

welding.

When replacing a drier:

Weld and parts by blowing nitrogen (1.42-2.85 psi) to high pressure side after

assembling a drier.

When replacing a compressor:

Weld and parts by blowing nitrogen to the low pressure side.

Note) For other parts, nitrogen blowing is not necessary because it does not produce oxidized

scales inside pipe because of its short welding time.

3. Replacement of drier.

Inserting a capillary tube

Measure distance with a ruler and put a mark(0.47+0.12/-0)on the capillary tube. Insert tube to

the mark and weld it

KEY POINT

Observe the sequence for

removal of refrigerant.

(If not, compressor oil may

leak.)

KEY POINT

Welding without nitrogen

blowing produces oxidized

scales inside a pipe, which

affect performance and

reliability of a product.

KEY POINT

Be sure to check the

inserted length of capillary

tube when it is inserted.

(If inserted too far, the

capillary tube will be

blocked by the filter.)

Compressor

Low pressure side

CondenserHigh pressure side

Drier

Evaporator

ReleaseRefrigent

Intake

Suction

Hot Line

1 2 1

2

Evaporator

Drier

High pressure side

CondenserRefrigentIntake

Hot Line

0.47+0.12-0

Filter

* Unit : inch



TROUBLE DIAGNOSIS

- 129 -

Items Precautions

4. Vacuum degassing.

Pipe Connection

Connect the red hose to the high pressure side and the blue hose to

the low pressure side.

Vacuum SequenceOpen valves and and evacuate for 40 minutes. Close valve .

5. Refrigerant charging.

Charging sequence

1) Check the amount of refrigerant supplied to each model after completing vacuum

degassing.

2) Evacuate charging canister with a vacuum pump.

3) Measure the amount of refrigerant charged.

- Measure the weight of an evacuated charging canister with an electronic scale.

- Charge refrigerant into a charging canister and measure the weight. Calculate the weight

of refrigerant charged into the charging canister by subtracting the weight of an

evacuated charging canister.

KEY POINT

- If power is applied

during vacuum

degassing, vacuum

degassing will be

more effective.

- Run the compressor

while charging the

system. It is easier

and works better.

KEY POINT

- Be sure to charge the

refrigerant at around

25°C [77°F].

- Be sure to keep -5g in

the winer and +5g in

summer.

the amount of refrigerant charged = weight after charging -

weight before charging (weight of an evacuated cylinder)

Calculation of amount of refrigerant charged

2 1

3

Compressor

Lowpressure

Condenser

Highpressure

Drier

Evaporator

Red

Yellow

Blue

VaccumPump

Suction pipe

Hot Line

R134a

Indicate the weight of anevacuated charging canister



3-5. Standard Regulations For Heavy Repair

TROUBLE DIAGNOSIS

- 130 -

Items Precautions

4) Refrigerant Charging

Charge refrigerant while operating a compressor as shown above.

5) Pinch the charging pipe with a pinch-off plier after completion of charging.

6) Braze the end of a pinched charging pipe with copper brazer and make a gas leakage test

on the welded parts.

6. Gas-leakage test * Test for leaks on the welded or suspicious area with an electronic leakage tester.

7. Pipe arrangement When replacing components, be sure

in each cycle each pipe is replaced in its original

position before closing the cover of the

mechanical area.

Compressor

Condenser

Drier

Hot Line

Evaporator

Charging Canister

Bushing

0 .

4 +

0 .

2

0

0 .

4 +

0 .

2

0

1) Observe the safety precautions for gas handling.

2) Use JIG (or a wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation

break and accident.)

3) The inner case will melt and the insulation will burn.

4) The copper piping will oxidize.

5) Do not allow aluminum and copper pipes to touch. (In order to prevent corrosion.)

6) Observe that the inserted length of a capillary tube into a drier should be 0.47 mm.

7) Make sure that the inner diameter is not distorted while cutting a capillary tube.

8) Be sure that the suction pipe and the filling tube should not be substituted each other during welding. (High efficiency

pump.)

0.47+0.12-0

Drier

Molecular PipeMolecular

Sieves

+0.12-0



3-6. Brazing Reference Drawings

TROUBLE DIAGNOSIS

- 131 -

PIPE ASSEMBLY, JOINT

PIPE ASSEMBLY, HOT LINE(Freezer)

PIPE ASSEMBLY,

JOINTCONDENSER ASSEMBLY, WIRE

PIPE ASSEMBLY, SUCTION

DRIER ASSEMBLYCAPI - TUBE

Copper BrazingCopper

Brazing

Silver

Brazing

Silver Brazing

Copper

Brazing

Copper BrazingCopper Brazing Coppper Brazing

Silver Brazing



4. HOW TO DEAL WITH CLAIMS

4-1. Sound

TROUBLE DIAGNOSIS

- 132 -

Problems Checks and Measures

Hiss Explain general principles of sounds.

• All refrigerators make noises when they run.

The compressor and fan produce sounds.

There is a fan in the freezer compartment which blows cool air to freezer and

refrigerator compartments. Hissing is sounds are heard when the air passes

through the narrow holes into the freezer and refrigerator compartments.

Cooling Fan sound in the compressor compartment.

• There is a fan on the back of the refrigerator which cools the compressor

compartment. If there is a small space between the refrigerator and the wall, the

air circulation sounds may be noticeable.

Noise of Compressor.

• This operating sound happens when the compressor compresses therefrigerant. The compressor rotates at 3600 RPM. The sound of compressor

Bigger refrigerators make more noise than small ones

Click Explain the principles of temperature change.

• The sounds happens when pipes and internal evaporator in the refrigerator

compartment expand and contract as the temperature changes during the

refrigerator operation. This sound also happens during defrosting, twice a day,

when the ice on the evaporator melts.

Clunk Explain that it comes from the compressor when the refrigerator starts.

• When the refrigerator operates, the piston and motor in the compressor rotate

at 3600 RPM. This sound is caused by the vibration of motor and piston when

they start and finish their operation. This phenomenon can be compared with

that of cars. When an automobile engine starts, it is loud at first but quiets

down quickly. When the engine stops, so does the vibration.

Vibration Check the sound whether it comes from the pipes vibration and friction.

• Insert bushing or leave a space between pipes to avoid the noise.

• Fix the fan blade if it is hitting on the shroud

• Fix the drip tray if it is loosened.

Sound depends on the installation location.

• Sound becomes louder if the refrigerator is installed on a wooden floor or near

a wooden wall. Move it to the another location.

• If the refrigerator is not leveled properly, a small vibration can make a loud

sound. Please adjust the level of the refrigerator.



TROUBLE DIAGNOSIS

- 133 -


Sounds of water flowing Explain the flow of refrigerant.

• When the refrigerator stops, the water flowing sound happens.This sound happens when the liquid or vapor refrigerant flows from the

evaporator to compressor.

Click Explain the characteristics of moving parts.

• This noise comes from the MICOM controller's switch on the top of the

refrigerator when it is turned on and off.

Noise of Icemaker operation Explain the procedure and principles of Icemaker operation.(applicable to model with Icemaker). • The automatic icemaker continuously cycles through water supply icemaking

- Noise produced by ice dropping ice ejection repeat. When water is dispensed, the water supply

and hitting ice bin. valve in the mechanical area makes hissing sounds and you can

- Noise from motor sounds Hiss. hear the water flow. When water freezes, you can hear clicking. When ice is

ejected, you can hear the motor run, the tray twist, and ice breaking and falling

into the bin.

Noise when dispensing water. Explain the principles of water supplied to dispenser.

• When the water supply button in the dispenser is pressed, the water supply

valve in the compressor compartment opens and let the water flow to the water

tank in the lower part of the refrigerator compartment. The water is dispensed

by this pressure. When this happens, motor sound and water flowing sound are

heard.

Noise when dispensing ice. Explain the principles of ice supply and procedure of crushed icemaking in a

dispenser.

• When ice cube button is pressed, ice stored in the ice bin is moved by an auger

and dispensed. If crushed ice button is pressed, the ice cube is crushed.

When this happens, ice crushing and hitting ice bin sounds are heard.



4-2. Measures for Symptoms on Temperature

TROUBLE DIAGNOSIS

- 134 -


Refrigeration is weak. Check temperature set in the temperature control knob.

• Refrigerator is generally delivered with the button set at normal use (MID).

But customer can adjust the temperature set depending on their habit and taste.

If you feel the refrigeration is weak, then set the temperature control button at

strong position. If you adjust the button in the freezer compartment as well,

the refrigeration is stronger than adjusting refrigerator only.

The food in the chilled drawer is . The chilled drawer does not freeze food.

not frozen but defrosted • Use chilled drawer for storing fresh meat or fish for short periods. For storing for

a long periods or freezing food, use a freezer compartment. It is normal that

frozen foods thaw above the freezing temperature (in the chilled drawer).

Refrigerator water is not cool. Check the water storage location.

• If water is kept in the door rack, move it to a refrigerator shelf. It will then

become cooler.

Ice cream softens. Explain the characteristics of ice cream.

• Because of its ingredients,icecream melts beginning at 18°F (-8°C).Ice cream

will still besoft when ice is still frozen solid.Consequently it should bestored on a

lower shelf in the freezer and not in the door.

• Store ice cream in a cold place or set the temperature control button of a freezer

at strong position.

Refrigeration is too strong. Check the position of temperature control button.

• Check if refrigeration is strong in whole area of the refrigerator or partly near the

outlet of the cooling air. If it is strong in whole area, set the control button at

weak . If it is strong only near the outlet of cool air, keep food (especially damp

foods and easily frozen foods) away from the outlet.

Vegetables are frozen. Check the vegetables storage.

• If vegetables are stored in the refrigerator shelf or chilled drawer instead of

vegetable drawer, they will be frozen. Set the control button at weak if they are

also frozen in the vegetable drawer.

The food stored at inside of Check if food is stored near the outlet of the cooling air.

the shelf freezes even the • The temperature at cooling air outlet is always below the freezing point.

control button is set at MID. Do not store food near the outlet of the cooling air as it block the air circulation.

Do not block the outlet. If the outlet of the cooling air is blocked, the refrigerator

compartment will not be cooled.



4-3. Odor and Frost

TROUBLE DIAGNOSIS

- 135 -


Odor in the refrigerator compartment. Explain the basic principles of food odor.• Each food has its own particular odor. Therefore it is impossible to prevent or

avoid food odor completely when food is stored in the completely sealed

refrigerator compartment. The deodorizer can absorb some portions of the odor

but not all. The intensity of odor depends on refrigerator conditions and

environments.

Check the temperature control button and set at STRONG.

• Clean inside of the refrigerator with detergent and remove moisture. Dry inside

the refrigerator by opening the door for about 3 or 4 hours and then set the

temperature control button at STRONG.

Frost in the freezer compartment Explain the basic principles of frost formation.

• The main causes for frosting:

- Door was left open.

- Air penetration through the gasket

- Too frequent door opening. (parties. etc.)

- Hot foods are stored before they are cooled down. The temperature of freezer

is -19°C [-2.2°F]. if temperature is set at MID. If hot air comes into the

refrigerator, fine frost forms as cold air mixes with hot air. If this happens quite

often, much frost forms inside of the refrigerator. If the door is left open in

Summer, ice may form inside of the refrigerator.

Frost in ice tray. Explain basic principles of frost formation.

• When ice tray with full of water is put into a freezer compartment, the water

evaporates. If cool air fan operates, the moisture attached to the jaw (protruded

part) of ice mold will freeze and form frost. If warm water was put into the ice

mold, the situation will become worse.



4-5. Others

TROUBLE DIAGNOSIS

- 136 -


The refrigerator case is hot. Explain the principles of radiator.

• The radiator pipes are installed in the refrigerator case and partition plate

between the refrigerator and the freezer compartment in order to prevent

condensation formation. Particularly in summer or after installation of

refrigerator, it may feel hot but it is normal. If there is not enough space to

dissipate heat, it can be hotter due to lack of heat radiation. Please install a

refrigerator in a well-ventilated place and leave the clearance between

refrigerator and wall:

Small holes in door liner Explain that the small holes are to release pressure during the manufacturing process.

• It helps to make a better fit when plastic is vacuum molded and formed and

when foam insulation is blown in under pressure.

Electric bills are too much. Explain that the hole is to allow the air to escape when vacuum forming plastic

parts and pumping foam insulation into cavities.

There are small holes in the plastic liner of some parts of the refrigerator. Theseholes allow plastic parts to be injection molded and vacuum formed by allowing

air bubbles to be expelled. They also allow foam insulation to be pumped into

cavities where air bubbles may build up.

Condensation on the inside Explain how to store foods

wall of the refrigerator • Condensation forms when refrigerator is installed at damp area, door is

compartment and the cover of frequently opened, and wet foods are not stored in the air tight container or

properly vegetable drawer. wrapped. Be sure to store wet foods in airtight containers or securely covered in

plastic wrap.

When is the power connected? When should the power be connected ?

• You can connect the power immediately after installation. However, if therefrigerator was laid flat before or during installation, you must stand it upright

for 6 hours before plugging it in. This allows the refrigerant oils to return to the

sump in the compressor. If you operate the refrigerator before the oil has had a

chance to settle, you could damage the compressor.

Door does not open properly. Refrigerator compartment door does not open properly.

• When the door is opened, warm air gets into the refrigerator. As it cools, it

sometimes forms a slight vacuum. Pull the door gently to open it. This is normal

and causes no harm.

When the refrigerator compartment door is opened and closed, the freezer

compartment door moves up and down.

• When one of the doors is closed too for cefully, it can create a slight compression and

cause the other door to open slightly. This is normal. Close the door lightly to

eliminate this problem. If the doors are adjusted properly (the refrigerator is leveled

properly,) the doors will fall closed by themselves.

Door opens too easily.

• There is a magnet in the gasket so it closes securely without a gap. It can be

held open easily if something is in the way and obstructs the door ’s closing.

A door does not close properly.

• If the refrigerator is not properly leveled, the doors will not close easily. Adjust

the level using the leveling screws under the front of the refrigerator.

The front shouldbe a little bit higher

than the rear.



1. DOOR

1) Remove lower cover and then disconnect water

supply tube in the lower part of freezer door.

• Pull the water supply tube forward while pressing onthe coupling as shown in the drawing.

w Disconnecting the tube under the door causes about

1.5 liters water to flow out. Please put up a big

container to prevent it.

2) Remove the freezer door.

(1) Loosen hinge cover screw of freezer door and remove

cover.

Disconnect all connecting lines except grounding cord.

(2) Turn hinge lever in arrow A direction until it is

loosened and take it out in arrow B direction.

Note : • When disconnecting refrigerator door, turn hinge

lever counterclockwise.

• If the hinge or bracket are bent during assembly,

use two extra screws (Tap Tite M6, Left Hinge

attaching screw) in the holes of the upper hinge.

(3) Disconnect upper hinge from the hinge supporter

by grasping the front part of upper hinge and lifting up

the Upper Hinge Assembly in the direction of the arrow

C and pull forward in arrow D direction. Be careful

because the door may fall, damaging the door, the floor,

or injuring you.

(4) Lift up the freezer door in arrow direction and

disconnect the door from the lower hinge . Don’t pull

the door forward.

Note : • Lift up the freezer door until the water supply tube

is fully removed.

(5) Assembly is the reverse order of disassembly

HOW TO DISASSEMBLE AND ASSEMBLE

- 137 -

2

1A C D

4

5

6

7

3Connecting

Line

EarthingCord

Hinge Cover

Hinge Lever

A

B



2. HANDLE

1. Aluminum Handle Model

1) Use a small screwdriver blade in the groove at the side

of the Deco Handle to lift and separate the cover. Twistdown in the direction of arrow and lift the cover in the

direction of arrow.

2) Use a small screwdriver blade in the groove at the side

of the Deco Handle to lift and separate the cover. Twist

down in the direction of arrow and lift the cover in thedirection of arrow.

3) Push the handle piece in the direction of the arrow

and disconnect it.

4) Turn screw in arrow direction with a philips driver and

disconnect.

2. Aluminum short handle Model

1) Grasp the handle by both hands and push it upward.


- 138 -

1

Deco Handle

2

3

4

Handle Piece

Screw



3. FAN SHROUD GRILLE

1) Loosen one screw with a screwdriver blade.

2) Disassembly of an upper grille fan : Hold upper part of

an upper grille fan and pull forward carefully.

3) Disconnect housing A of an upper grille fan from themain body.

4) Disassembly of a lower grille fan : Hold upper part of a

lower grille fan and pull forward carefully.

5) Disassembly of an upper freezer shroud : Hold lower

part and pull forward

6 ) Disassembly of an upper freezer shroud : Disconnect

housing B

7) Check foam sticking conditions around a shroud, upper

freezer and low freezer during assembling. if damaged,

torn, or badly stuck, assemble with a new one after

sealing well.

4. ICEMAKER ASSEMBLY

1. Dispenser Model

1) How to disassemble:

(1) Remove ice bin from the freezer compartment.(2) Loosen two screws on the upper part of icemaker

bracket.

(3) Disconnect icemaker bracket so that it can slide

forward.

(4) Disconnect icemaker housing and sensor housing.

(5) Disconnect icemaker horizontally by pressing bracket

hook part. ( Don’t disassemble further. The set value

may be changed.)

2) The assembly is the reverse order of the above

disassembly.

NOTE: If the ice tray (mold) is not horizontal after repair

and assembly, something must be wrong. Check it

and reassemble if necessary.


- 139 -

IceMaker BracketHook

IceMaker Unit

Lever

Ice Tray (Mold)

Sensor

Insulation

Sensor Cover

Grille fan(U)

Grille fan(L)

Shroud f(U)

Housing B

Housing A



5. WATER-VALVE DISASSEMBLY

METHOD

1) Turn off the power of the refrigerator (pull out the plug).

Open the F/R Door and disassemble the Lower Cover.

2) Lay a dry towel on the floor and get ready to pour water

from the water tank.

Then press the collet to separate the tube from the

connector and pour out the water until emptied.

(Refer to the label attached on Front L on how to

separate the tube.)

3) Lock the water being supplied. Then separate the Water

Connection connected to the Water Valve.

4). Separate the Cover Back M/C and Valve Screw.

5) Separate the housing and pull out the valve.

6. FAN AND FAN MOTOR DISASSEMBLY

METHOD

1) Using a short screw driver, loosen one SCREW in

DRAIN ASSEMBLY, PIPE-Z and one connected to the

COVER, MOTOR.

2) Pull and separate the FAN ASSEMBLY and MOTOR in

counter clockwise based on the MOTOR SHAFT.

The assembly is in the reverse order of the disassembly

and take special care for the following details.

1. Be careful not to bend the tube during assembly.

2. Press the WATER DISPENSER button until water pours

out and check for leakage in the CONNECTOR TUBE (It

differs by the water pressure but usually takes about 2

minutes until water pours out.)


- 140 -

Cover Back M/C

Housing

*Disassembly

1. Remove clip. (Retire la abrazadera.)

2. Pull out tube while presiona(Extraiga el tubo mientras presionalos anillos metalicos y desmontelo.)

*Assembly

1. Insert tube until you can see only one line.(Inserte el tubo hasta que solo puesa ver una linea.)

2. After inserting, pull out tube to check if it’s properly inserted.(Tras insertarlo, extraiga el tubo para comprobar si ha sido insertadocorrectamente.

3. Assemcie clip. (Monte la abrazadera.)

Collet(anillos metalcos)

Tube(Tubo)

Insert Line(Linea de insercion)

Clip(Abrazadera)

→

→

DRAIN ASSEMBL, PIPE-Z COVER, MOTOR

FAN ASSEMBLY MOTOR



7. DISPENSER

1) Disconnect funnel and button assembly by pulling down

and forward.

2) Remove the Display Frame by pressing a screwdriver

between the Frame and the Door and pulling it forward.

Insert the screwdriver at the bottom (see drawing,

below.) The Frame is attached by hooks at the top. Pull

the bottom out and lift the frame up.

3) The Display Assembly can be connected by pressing

the top of the Dispenser Cover and pushing it after

separating the Display Frame from its housing.

4) Loosen four screws with a phillips screwdriver and pull

the Funnel Assembly to disconnect.

5) The Duct Cap Assembly can be disconnected if the hold

lever connecting screw is loosened with a phillips driver.

6) To install the Duct Cap Assembly, insert one end of the

spring into the right hole of the dispenser lever and

insert the other end into the right hole in the top part of

the dispenser. Then attach the holder at the solenoid

switch.


- 141 -

Button

Funnel Assembly

Funnel

Assembly

Solenoid Assembly

Duct Cap

Assembly

Holder

Lever

Spring

Sheet Heater

Dispenser Lever

Solenoid Assembly



7) Dispenser Related Parts


- 142 -

18 2120

19

7

8

14

17 15

277A

9

10

452

3

11

6

22

12 13

1

16

1 FRAME ASSEMBLY, DISPLAY

2 COVER, DISPENSER

3 DECO, FRAME DISPLAY

4 PWB(PCB) ASSEMBLY, DISPLAY

5 BUTTON ASSEMBLY

6 BUTTON DECO

7 FUNNEL ASSEMBLY

8 MICRO SWITCH

9 FRAME, FUNNEL

10 LEVER(SWITCH)

11 FUNNEL

12 BUTTON LEVER

13 HOLLDER BUTTON

14 SOLENOID ASSEMBLY

15 SPRING

16 LEVER HOLDER

17 CAP ASSEMBLY, DUCT

18 CAP, DUCT

19 DISPENSER LEVER

20 FOAM, NEW

21 RUBBER, CAP

22 DECO, DRAIN

17 Cap Assembly, Duct Detailed Drawings



FREEZER DOOR PART: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 159 -

210B

210B

202A

200A

210A

203A201A

210B

205A



REFRIGERATOR DOOR PART: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 160 -

240B

232A

240C

233A

230A

239A

231A

241C

240A

240A

205A



FREEZER COMPARTMENT: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 161 -

408A

302B

400A

271B

270C

271A

103A

312A

152A

105B

272A

135B

137A

136D

329A

135A136B

403A

136C

401A

130A128E *

126A

120B

120B

120B

270A

402A

128F*



REFRIGERATOR COMPARTMENT: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 162 -

624A

626B

626A

624C

504A

168A

271B

271C

103A

152A

166A

166B

165A

272B

116A

115A

150A

270D

402A

270B

151A

140A

170A

141A

171B

171A

140A

140B

408B

626C

401A*

162A

162B



ICE & WATER PART: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 163 -

614A

613A

606A

610A

404A

625A

611B

611A

611C

611D

404B

619A

616E

623A

618A

616D

616G

616F

627A

621B

612A

612B

612C

601A

605A

602A

604A

603B

603A

607A

600A



MECHANICAL COMPARTMENT: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 164 -

105C

105E

105D

327A*

328A*

328B*

300A310B

307A

304A

306A

310A

317B

317A

305C 305B

313A

301A

307A

104A

305C

305B

303C

303B

303A

305A

308A308C

308B

309B

403B

309B

309A

500A

502B

406A

502A

407B

407A

101B

101A

316A *



DISPEDNSER PART: LSC26905TT (Refer to appendix)

EXPLODED VIEW

- 165 -

278A

402C

405A

275A 276A

277A

278B

278C

278F

280C280B

501A *

279A

279B

280A

281A

278G

401C

276B



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LSC26905xx LG 26 Cu. Ft. Side by Side Refrigerator Service Manual

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