REFRIGERATOR SERVICE MANUAL

REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL: LFX25960ST LFX21960ST

LFX25960SW LFX21960SW

LFX25960SB LFX21960SB

LFX25960TT LFX21960TT

COLOR: TITANIUM

WESTERN BLACK

SUPER WHITE

STAINLESS

CONTENTS

SAFETY PRECAUTIONS ....................................................................................................................................................... 2

1. SPECIFICATIONS............................................................................................................................................................... 3

2. PARTS IDENTIFICATION ................................................................................................................................................... 4

3. DISASSEMBLY.............................................................................................................................................................. 5-13

REMOVING AND REPLACING REFRIGERATOR DOORS ...............................................................................................5

DOOR .............................................................................................................................................................................. 6-7

TO REMOVE THE DISPENSER .........................................................................................................................................7

DOOR ALIGNMENT ............................................................................................................................................................7

FAN AND FAN MOTOR(Evaporator) .................................................................................................................................. 7

ICE FAN SCROLL ASSEMBLY REPLACEMENT ..............................................................................................................8

DEFROST CONTROL ASSEMBLY .................................................................................................................................... 8

LAMP .................................................................................................................................................................................. 8

CONTROL BOX-REFRIGERATOR .................................................................................................................................... 8

MULTI DUCT ...................................................................................................................................................................... 9

MAIN PWB, DISPLAY PWB REPLACEMENT, FUNNEL REPLACEMENT........................................................................9

SUB PWB FOR DISPENSER, DUCT DOOR REPLACEMENT, ICE CORNER DOOR

REPLACEMENT, ICE MAKER ASSEMBLY ......................................................................................................................10

AUGER MOTOR COVER, AUGER MOTOR REPLACEMENT .........................................................................................11

DOOR ICE BIN ..................................................................................................................................................................12

HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER...............................................................................13-16

4. ADJUSTMENT............................................................................................................................................................. 17-18

COMPRESSOR ................................................................................................................................................................ 17

PTC-STARTER ................................................................................................................................................................. 17

OLP(OVERLOAD PROTECTOR)......................................................................................................................................18

TO REMOVE THE COVER PTC .......................................................................................................................................18

5. CIRCUIT DIAGRAM.......................................................................................................................................................... 19

6. TROUBLESHOOTING................................................................................................................................................. 20-24

COMPRESSOR AND ELECTRIC COMPONENTS.......................................................................................................... 20

OTHER ELECTRICAL COMPONENTS ........................................................................................................................... 21

SERVICE DIAGNOSIS CHART ........................................................................................................................................ 22

REFRIGERATION CYCLE .......................................................................................................................................... 23-24

7. OPERATION PRINCIPLE & REPAIR METHOD OF ICEMAKER .............................................................................. 25-27

8. DESCRIPTION OF FUNCTION, CIRCUITS & ERROR CODES..................................................................................28-42

9. EXPLODED VIEW & REPLACEMENT PARTS LIST ..................................................................................................... 43-

SAFETY PRECAUTIONS

Please read the following instructions before servicing your refrigerator.

1. Unplug the power before handling any elctrical componets.

2. Check the rated current, voltage, and capacity.

3. Take caution not to get water near any electrical components.

4. Use exact replacement parts.

5. Remove any objects from the top prior to tilting the product.

- 2 -

1. SPECIFICATIONS

21 cu. ft. / 25 cu. ft.

ITEMS

DOOR DESIGN

DIMENSIONS (inches)

NET WEIGHT (pounds)

COOLING SYSTEM

TEMPERATURE CONTROL

DEFROSTING SYSTEM

DOOR FINISH

HANDLE TYPE

INNER CASE

INSULATION

DIMENSIONS

SPECIFICATIONS

Side Rounded

35 3 /

4

X

30

X

69 3 /

4

(W

X

D

X

H) 21cu.ft

35 3 /

4

X

34 1 /

4

X

69 3 /

4

(W

X

D

X

H) 25cu.ft

302.58 (21cu.ft)

324.18 (25cu.ft)

Fan Cooling

Micom Control

Full Automatic

Heater Defrost

Embossed Metal, VCM, Stainless

Bar

ABS Resin

Polyurethane Foam

ITEMS

VEGETABLE TRAY

COMPRESSOR

EVAPORATOR

CONDENSER

REFRIGERANT

LUBRICATING OIL

DEFROSTING DEVICE

REFRIGERATOR

LAMP

FREEZER

SPECIFICATIONS

Opaque Drawer Type

Recipro

Fin Tube Type

Wire Condenser

R-134a (125 g)

ISO10 (280 ml)

SHEATH HEATER

60 W (2EA)

60 W (1EA)

Depth w/ Handles

Depth w/o Handles

Description LF

X21960** LFX25960**

A 30 in.

34 1/4 in.

B 27 1/2 in.

31 3/4 in.

Depth w/o Door

Depth (Total with Door Open)

Height to Top of Case

Height to Top of Door Hinge

C

D

E

F

23 5/8 in.

42 1/4 in.

68 3/8 in.

69 3/4 in.

27 7/8 in.

46 1 /2 in.

68 3/8 in.

69 3/4 in.

Width

Width (door open 90 deg. w/o handle)

Width (door open 90 deg. w/ handle) I

G

H

35 3/4 in.

39 1/4 in.

44 1/4 in.

35 3/4 in.

39/1/4 in.

44 1/4 in.

- 3 -

2. PARTS IDENTIFICATION

N

C

M

D

E

L

F

B

A

I

A

B

C

D

E

Refrigerator Light

Filter (Inside)

Modular Door Bins

Refrigerator Shelves

Supra Fresh Crisper with

Tilt-Out Compartment

Ice Room

F

G

H

(Ice Maker and Ice Bank)

Pull out Drawer

Turbo Motor

M

N

O

P

I

J

K

L

Q

Tilt-Out Door Basket

Durabase

Divider

Ice Bin

Water Tank Cover

Snack Pan

Egg Box

Dairy Bin

Bottle Holder

- 4 -

P

O

Q

C

J

K

H

G

Ice Bank

Ice Door

3. DISASSEMBLY

3-1 REMOVING AND REPLACING REFRIGERATOR DOORS

●

Removing Refrigerator Door

w CAUTION: Before you begin, unplug the refrigerator. Remove food and bins from doors.

u

Left Door -FIG. 2

1. Disconnect water supply tube by pushing back on the disconnect ring (4).-FIG. 1

2. Open door. Loosen top hinge cover screw (1).

Use flat tip screwdriver to pry back hooks on front underside of cover (3). Lift up cover.

3. Disconnect door switch wire harness (2). Remove cover.

4. Pull out the tube.

5. Disconnect the three wire harnesses (5). Remove the grounding screw (6).

6. Rotate hinge lever (7) counterclockwise and remove. Lift top hinge (8) free of hinge lever latch (9).

w CAUTION: When lifting hinge free of latch, be careful that door does not fall forward.

7. Lift door up from middle hinge pin and remove door.

8. Place door, inside facing up, down onto a non-scratching surface.

u

Right Door -FIG. 3

1. Open door. Loosen top hinge cover screw (1). Lift up cover (3).

2. Disconnect door switch wire harness (2). Remove cover.

3. Disconnect wire harness (5). Remove the grounding screw (6).

4. Rotate hinge lever (7) clockwise and remove. Lift top hinge (8) free of hinge lever latch (9).

w CAUTION: When lifting hinge free of latch, be careful that door does not fall forward.

5. Lift door up from middle hinge pin (10) and remove door.

6. Place door, inside facing up, down onto a non-scratching surface.

Figure 2

3

1

2

Figure 3

3

2

1

7

6

4

5

6

7

8

9

5

8

9

Figure 1

4

- 5 -

3-2 DOOR

●

Door Gasket Removal

1. Remove door frame cover

Starting at top of cover and working down, snap cover out and away from door.

●

Door Gasket Replacement

1. Insert gasket bracket clips

1) Insert gasket bracket edge beneath door frame edge.

2) Turn upper gasket bracket spring so that the spring ends are in the door channel.

3) Push in clip until you hear it snap securely into place.

Frame Cover

Handle

Figure 1

2. Remove gasket bracket clips

There are two clips on each door. Start bracket removal near one of the middle clips.

1) Pull gasket back to expose gasket bracket clip and door frame.

2) Insert a flat tip screwdriver into seam between gasket bracket and door frame and pry back until clips snap out.

3) Continue prying back along seam until all clips snap out.

Gasket

Bracket Clip

Spring

Door

Frame

Correct Incorrect

Figure 4

4) Push in remaining clip until you hear it snap securely into place.

Note: Make sure that no part of gasket bracket edge protrudes from beneath door frame edge.

2. Insert gasket into channel

1) Snap gasket assembly into the door bracket.

<Inserting the Gasket Assembly into the Bracket Door>

Door

Frame

Flat Tip

Screwdriver

Gasket

Bracket Clip

Gasket

Bracket

Figure 2

3. Remove gasket

Pull gasket free from gasket channel on the three remaining sides of door.

Correct

Incorrect

Figure 5

Figure 3

- 6 -

.

2) Press gasket into channels on the three remaining sides of door.

3-3 DOOR ALIGNMENT

If the space between your doors is uneven, follow the instructions below to align the doors:

1. With one hand, lift up the door you want to raise at middle hinge.

2. With other hand, use pliers to insert snap ring as shown.

3. Insert additional snap rings until the doors are aligned.

(Three snap rings are provided with unit.)

Figure 6

3. Replace door frame cover

Starting at top of cover and working down, snap cover back into door.

Figure 7

Figure 10

3-4 FAN AND FAN MOTOR(EVAPORATOR)

1. Remove the freezer shelf. (If your refrigerator has an icemaker, remove the icemaker first)

2. Remove the plastic guide for slides on left side by unscrewing phillips head screws.

3. Remove the grille by removing one screw and pulling the grille forward.

4. Remove the Fan Motor assembly by loosening 2 screws and disassembling the shroud.

5. Pull out the fan and separate the Fan Motor and Bracket.

FAN MOTOR

BRACKET

MOTOR

FAN

GRILLE

Figure 11

- 7 -

* Ice Fan Scroll Assembly Replacement

1) Remove the plastic guide for slides on left side by unscrewing phillips head screws.

2) Pull the grille forward as shown in the second picture.

3) Disconnect wire harness of the grille

4) Remove the scroll assembly by loosening 2 screws

3-6 LAMP

(1) (2)

Figure 14

3-6-1 Refrigerator Compartment Lamp

1. Unplug Refrigerator, or disconnect power at the circuit breaker.

2. If necessary, remove top shelf or shelves.

3. Using a flat instrument, gently pry the cover loose in the front as shown. Rotate downward to remove rear tabs.4.

Make sure the bulbs are cool to the touch.

Turn bulbs counterclockwise to remove.

5. Assemble in reverse order by snapping the Lamp Cover in, engaging the rear tabs followed by the front tabs.

(Max. 60 W-2EA)

(3)

3-5 DEFROST CONTROL ASSEMBLY

(4)

Defrost Control assembly consists of Defrost Sensor and

FUSE–M.

The Defrost Sensor works to defrost automatically. It is attached to the metal side of the Evaporator and senses its temperature. At 72°C, it turns the Defrost Heater off.

Fuse-M is a safety device for preventing over-heating of the Heater when defrosting.

1. Pull out the grille assembly. (Figure 12)

2. Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap. (Figure 13)

GRILLE ASSEMBLY

DEFROST-CONTROL

ASSEMBLY

Figure 15

3-6-2 Freezer Compartment Lamp

1. Unplug refrigerator power cord form outlet.

2. Using a flat instrument, gently pry the lamp cover loose in the front as shown. Rotate downward to remove the rear tabs.

3. Make sure the bulb is cool to the touch. Turn the bulb counterclockwise to remove.

4. Replace with a new 60-watt appliance bulb.

5. Insert tabs on back of cover into slots in freezer ceiling. Push cover up to snap front into place.

3-7 CONTROL BOX-REFRIGERATOR

1. First, remove all shelves in the refrigerator, than remove

Figure 12

Figure 13

CONTROL BOX

- 8 -

COVER LAMP

Figure 16

the Refrigerator control Box by loosening 2 screws.

2. Remove the Refrigerator Control Box by pulling it downward.

3. Disconnect the lead wire on the right position and separate the lamp sockets.

3-8 MULTI DUCT

1. Remove the upper and lower Caps by using a flat screwdriver, and remove

2 screws. (Figure 17)

2. Disconnect the lead wire on the bottom position.

2) Remove display frame assembly by making a gap between a display frame assembly and door with a flat blade screwdriver and pulling it forward. The cover dispenser is attached with a hook.

3-9 MAIN PWB

1) Loosen the 3 screws on the PWB cover.

Figure 17

w CAUTION: When replacing the dispenser cover in the reverse order of removal, be careful that the lead wire does not come out and the water tube is not pinched by the dispenser cover, as shown in the picture below.

2) Remove the PWB cover

3-11 DISPLAY PWB REPLACEMENT

1) Pull up and out on the dispenser cover to remove.

3) Disconnect wire harness and replace the main PWB in the reverse order of removal.

2) Follow the steps in the pictures

3-10 DISPENSER

1) Disconnect funnel and button assembly by pulling down and forward.

- 9 -

3-12 FUNNEL REPLACEMENT


2) Disconnect the wire harness.

3) Replace in reverse order.

3-13 SUB PWB FOR WORKING DISPENSER

1) Loosen the screw on the sub PWB.

3-15 ICE CORNER DOOR REPLACEMENT

1) Loosen the front screw as shown in the picture.

2) Lift up the hinge with one hand.

3) Pull out the Ice Corner Door with the other hand.

hinge

2) Pull the sub PWB down.

3) Disconnect the wire harness and replace the sub PWB in the reverse order of removal.

3-16 ICEMAKER ASSEMBLY

1) Loosen two screws as shown in the first picture.

3-14 DUCT DOOR REPLACEMENT


2) Disconnect the wire harness.

3) Remove the funnel

4) Replace in reverse order.

2) Disconnect the wire harness & ground screw replace theIcemaker assembly in the reverse order of removal.

3) It separates a ground connection screw.

- 10 -

3-17 AUGER MOTOR COVER

1) After removing the icemaker remove the (5) stainless screws holding the auger motor cover, shown in the picutres below.

2) Grip the bottom of motor cover assembly and pull out it.

3) Disconnect wire harness of motor cover assembly.

There is a auger motor on the back, as shown in the picture.

Auger Motor

- 11 -

3-18 HOW TO REMOVE A DOOR ICE BIN

1) Grip the handles, as shown in the picture.

3-19 HOW TO INSERT A DOOR ICE BIN

1) Insert the Ice Bin, slightly tilting it to avoid touching the

Icemaker. (especially, ice maker lever)

2) Lift the lower part slightly.

1

2

Insert the ice bucket carefully avoid contacing the automatic shut off arm.

3) Take the Ice Bin out slowly.

- 12 -

3-20 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER

3-20-1 Follow Steps to Remove

Step 1) Open the freezer door. Step 2) Remove the lower basket.

Step 3) Remove the two screws from the guide rails (one from each side).

Step 4) Lift the freezer door up to unhook it from the rail support and remove.

Pull both rails to full extension.

Step 5) First: Remove the gear from the left side first by releasing the tab behind the gear, place a screwdriver between the gear and the tab and pull up on the gear.

Second: Remove the center rail.

Third: Remove the gear from the right side by following the same steps for the left side.

NOTE: THIS TAB MUST BE PUSHED IN TO RELEASE THE GEAR.

- 13 -

3-20-2 Follow Steps to Reinstall

Step 1) Reinstall the right side gear into the clip.

Step 2) Insert the rail into the right side gear. Gears do not need to be perpendicular to each other.

Step 3) Insert the rail into the left side gear, and insert the gear into the clip.

Step 4) The rail system will align itself by pushing the rails all the way into the freezer section.

Pull the rails back out to full extension.

Step 5) Reinstall the freezer door by inserting the rail tabs into the guide rail.

Step 6) Reinstall the two screws into the guide rails

(one from each side).

Step 7) Reinstall the lower basket, and close the freezer door.

- 14 -

3-20. WATER VALVE DISASSEMBLY METHOD

1) Turn off the water. Then separate the water line from the valve.

3-21. FAN AND FAN MOTOR DISASSEMBLY

METHOD

1) Using a short screwdriver, loosen one SCREW in

DRAIN PIPE ASSEMBLY and one connected to the

MOTOR COVER.

MOTOR COVER

→

2). Separate the Mechanical Cover and Valve Screw.

Mechanical Cover

2) Pull and separate the FAN ASSEMBLY and MOTOR turning counterclockwise based on the MOTOR SHAFT.

FAN ASSEMBLY MOTOR

→

3) Separate the housing and pull out the valve.

Housing

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.)

4) Lay a dry towel on the floor and get ready to spill water from the water filter. Pull out the Cilp. Then press te collet to separate the tube from the connector and pour out the water until emptied.

Tube

Collet

Insert Line

Clip

- 15 -

3-22 PULL OUT DRAWER

o separate the drawer, push the front left and right hooks in direction to pull up and remove.

Then gently lift the gear part of rear left and right side of the drawer and pull it out in direction.

1

3

2

To install, reposition the gear part of rear left and right side of the drawer after pulling out both rails as much as possible, and gently push down both left and right side while checking the hook on the front part.

Hook

- 16 -

4. ADJUSTMENT

4-1 COMPRESSOR

4-1-1 Role

The compressor intakes low temperature and low pressure gas from the evaporator of the refrigerator and compresses this gas to high-temperature and high-pressure gas. It then delivers the gas to the condenser.

4-1-2 Composition

The compressor includes overload protection. The PTC starter and OLP (overload protector) are attached to the outside of the compressor. Since the compressor is manufactured to tolerances of 1 micron and is hermetically sealed in a dust and moisture-free environment, use extreme caution when performing repairs.

4-1-3 Note for Usage

(1) Be careful not to allow over-voltage and over-current.

(2) If compressor is dropped or handled carelessly, poor operation and noise may result.

(3) Use proper electric components appropriate to the

Particular Compressor in your product.

(4) Keep Compressor dry.

If the Compressor gets wet (in the rain or a damp environment) and rust forms in the pin of the Hermetic

Terminal, poor operation and contact may result.

(5) When replacing the Compressor, be careful that dust, humidity, and soldering flux don’t contaminate the inside of the compressor. Dust, humidity, and solder flux contaminate the cylinder and may cause noise, improper operation or even cause it to lock up.

4-2 PTC-STARTER

4-2-1 Composition of PTC-Starter

(1) PTC (Positive Temperature Coefficient) is a no-contact semiconductor starting device which uses ceramic material consisting of BaTiO

3

.

(2) The higher the temperature is, the higher the resistance value. These features are used as a starting device for the Motor.

4-2-2 Role of PTC-Starter

(1) The PTC is attached to the Sealed Compressor and is used for starting the Compressor Motor.

(2) The compressor is a single-phase induction motor.

The starting operation, the PTC allows current flow to both the start winding and main winding.

4-2-3 PTC-Applied Circuit Diagram

●

Starting Method for the Motor

OVERLOAD PROTECTOR

N

2

PTC

S

LFX21960**

LFX25960**

C

3 2 5 6

2 3 6 5

COMPRESSOR

MOTOR

M

S

M

L1

PTC STARTER

Resistance Starter Capacitor Running

SEALED

TERMINAL

4-2-4 Motor Restarting and PTC Cooling

(1) It requires approximately 5 minutes for the pressure to equalize before the compressor can restart.

(2) The PTC device generates heat during operation.

Therefore, it must be allowed to cool before the compressor can restart.

4-2-5 Relation of PTC-Starter and OLP

(1) If the compressor attempts to restart before the PTC device is cooled, the PTC device will allow current to flow only to the main winding.

(2) The OLP will open because of the over current condition. This same process will continue (3 to 5 times) when the compressor attempts to restart until the PTC device has cooled. The correct OLP must be properly attached to prevent damage to the compressor.

Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.

4-2-6 Note for Using the PTC-Starter

(1) Be careful not to allow over-voltage and over-current.

(2) Do not drop or handle carelessly.

(3) Keep away from any liquid.

If liquid such as oil or water enters the PTC,

PTC materials may fail due to breakdown of their insulating capabilities.

(4) If the exterior of the PTC is damaged, the resistance value may be altered. This can cause damage to the compressor and result in a no-start or hard-to-start condition.

(5) Always use the PTC designed for the compressor and make sure it is properly attached to the compressor.

Parts may appear physically identical but could have different electrical ratings. Replace parts by part number and model number. Use only approved substitute parts.

- 17 -

4-3 OLP (OVERLOAD PROTECTOR)

4-3-1 Definition of OLP

(1) OLP (OVERLOAD PROTECTOR) is attached to the

Compressor and protects the Motor by opening the circuit to the Motor if the temperature rises and activating the bimetal spring in the OLP.

(2) When high current flows to the Compressor motor, the

Bimetal works by heating the heater inside the OLP, and the OLP protects the Motor by cutting off the current flowing to the Compressor Motor.

4-3-2 Role of the OLP

(1) The OLP is attached to the Sealed Compressor used for the Refrigerator. It prevents the Motor Coil from being started in the Compressor.

(2) For normal operation of the OLP, do not turn the Adjust

Screw of the OLP in any way.

(OVERLOAD PROTECTOR cross section)

Electrical characteristics part number

330 FBYY

12345678

-S1 BOX98

Customer part number

Lot code/ date code

Physical termination part number

Part

No. Name

Base, phenolic

(UL 94 V-0 rated)

Movable arm support, plated steel

Stationary contact support, plated steel

Heater support, plated steel

Heater, resistance alloy

Disc, thermostatic alloy

Movable arm, spring temper copper alloy

Contact, movable, silver on copper

Contact, stationary, silver on copper

Slug, plated steel

Cover, polyester

(UL 94 V -0 rated)

Pin connector, plated copper alloy

(To engage 2.33/2.66 mm dia. pin)

Quick-connect terminal, brass, conforms to UL 310, MEMA

DC-2, DIN 46344

Figure 19

4-4 TO REMOVE THE COVER PTC

(1) Remove the Cover Back M/C.

(2) Disconnect two housing upper side of comp connected in.

(3) Loosen two screws on comp base.

1

2

(

LFX25960**)

3

1

2 3

(

LFX21960**)

(4) Use a L-shaped flap tool to pry off the cover.

(5) Assembly in reverse order of disassembly.

- 18 -

5. CIRCUIT DIAGRAM

- 19 -

6. TROUBLESHOOTING

6-1 COMPRESSOR AND ELECTRIC COMPONENTS

(Rated Voltage

±10%)?

1

Power Source.

Remove PTC-Starter from Compressor and measure voltage between Terminal C of

Compressor and

Terminal 5 or 6 of PTC.

YES

2

2

3

Check resistance of

Motor

Compressor.

Check resistance of

PTC-Starter.

No Voltage.

OLP disconnected?

YES

Replace OLP.

NO

Check connection condition.

5

Reconnect.

Applied voltage isn't in acceptable range.

(115V ±10%)

Advise customer that power supply needs to be checked by an electrician.

Check resistance between M-C, S-C and

M-S in Motor

Compressor.

The range of resistance is between 1~50

Ω(ok)

Open or short

Replace

Compressor.

3 4

Check resistance of two terminals in

PTC-Starter.

Reference Page12.

5

3

5

4

Check OLP.

Check resistance of two terminals in OLP.

Reference Page12.

5

Check starting state.

Check the power supply under load.

(Compressor attempting to re-start after being off for 5 minutes).

Supply voltage rating with ±10%.

YES

Did compressor start?

YES

Compressor is OK

NO

Replace the compressor

NO

1

- 20 -

6-2 OTHER ELECTRICAL COMPONENTS

▼ Not cooling at all

Compressor doesn't run.

Check for open short or incorrect resistance readings in the following components a. Starting devices b. OLP c. Compressor coil d. Wiring harness

Cause

Short, open, or broken.

Poor contact or shorted.

Coil open or shorted.

Poor contact or shorted.

Replace indicated component.

▼ Poor cooling performance

Compressor runs poorly.

Check starting voltage.

Check voltage at starting devices.

Check current flowing in sub-coil of

Compressor.

Check rating of OLP.

Fan motor doesn't run.

Heavy frost buildup on

EVAPORATOR.

Check wiring circuit.

Check Fan Motor.

Check current flow in the following components:

Sensor

Fuse-M

Check current flow in the Defrost Heater.

Low voltage.

Poor or broken or open contact.

Shorted.

Lack of capacity.

Wire is open or shorted.

Coil is shorted or open.

Open.

Open.

Advise customer that the Power supply needs to be checked by an electrician.




Replace

Defrost Heater.

- 21 -

6-3 SERVICE DIAGNOSIS CHART

COMPLAINT

No Cooling.

Cools poorly.

Food in the

Refrigerator is frozen.

Condensation or ice forms inside the unit.

Condensation forms in the Exterior Case.

There is abnormal noise.

Door does not close well.

Ice and foods smell unpleasant.

POINTS TO BE CHECKED

• Is the power cord unplugged from the outlet?

• Check if the power switch is set to OFF.

• Check if the fuse of the power switch is shorted.

• Measure the voltage of the power outlet.

• Check if the unit is placed too close to the wall.

• Check if the unit is placed too close to the stove, gas cooker, or in direct sunlight.

• Is the ambient temperature too high or the room door closed?

• Check if food put in the refrigerator is hot.

• Did you open the door of the unit too often or check if the door is sealed properly?

• Check if the Control is set to Warm position.

• Is food placed in the cooling air outlet?

• Check if the control is set to colder position.

• Is the ambient temperature below 41°F(5°C)?

• Is liquid food sealed?

• Check if food put in the refrigerator is hot.

• Did you open the door of the unit too often or check if the door is sealed properly?

• Check if the ambient temperature and humidity of the surrounding air are high.

• Is there a gap in the door gasket?

• Is the unit positioned in a firm and even place?

• Are any unnecessary objects placed in the back side of the unit?

• Check if the Drip Tray is not firmly fixed.

• Check if the cover of the compressor enclosure in the lower front side is taken out.

• Check if the door gasket is dirty with an item like juice.

• Is the refrigerator level?

• Is there too much food in the refrigerator?

• Check if the inside of the unit is dirty.

• Are foods with a strong odor unwrapped?

• The unit smells of plastic.

● Other possible problems:

Check if frost forms in the freezer.

Not defrosting

REMEDY

• Plug into the outlet.

• Set the switch to ON.

• Replace the fuse.

• If the voltage is low, correct the wiring.

• Place the unit about 4 inches (10 cm) from the wall.

• Place the unit away from these heat sources.

• Lower the ambient temperature.

• Put in foods after they have cooled down.

• Don't open the door too often and close it firmly.

• Set the control to Recommended position.

• Place foods in the high-temperature section.

(front part)

• Set the control to Recommended position.

• Set the control to Warm position.

• Seal liquid foods with wrap.

• Put in foods after they have cooled down.

• Don't open the door too often and close it firmly.

• Wipe moisture with a dry cloth. It will disappear in low temperature and humidity.

• Fill up the gap.

• Adjust the Leveling Screw, and position the refrigerator in a firm place.

• Remove the objects.

• Fix the Drip Tray firmly in the original position.

• Place the cover in its original position.

• Clean the door gasket.

• Position in a firm place and level the

Leveling Screw.

• Make sure food stored in shelves does not prevent the door from closing.

• Clean the inside of the unit.

• Wrap foods that have a strong odor.

• New products smell of plastic, but this will go away after 1-2 weeks.

Check Components of the defrosting circuit.

Check the refrigeration system.

The system is faulty.

Perform sealed system repair.

Check the

Thermistor.

The operation of the Thermistor is incorrect.

- 22 -

Replace the

Thermistor.

6-4 REFRIGERATION CYCLE

▼ Troubleshooting Chart

CAUSE

STATE OF

THE UNIT

STATE OF THE

EVAPORATOR

PARTIAL Freezer Low flowing sound of

LEAKAGE compartment and Refrigerant is heard and

Refrigerator don't frost forms in inlet only.

cool normally.

COMPLETE Freezer Flowing sound of refrigerant

LEAKAGE compartment and is not heard and frost isn't

Refrigerator don't formed.

cool normally.

PARTIAL

CLOG

Freezer Flowing sound of refrigerant compartment and is heard and frost forms

Refrigerator don't in inlet only.

cool normally.

WHOLE

CLOG

MOISTURE

CLOG

Freezer compartment and

Flowing sound of refrigerant is not heard and frost isn't

Refrigerator don't cool. formed.

Cooling operation Flowing sound of refrigerant stops periodically.

is not heard and frost melts.

COMP-

RESSION

Freezer and

Refrigerator don't cool.

NO COMPNo compressing

RESSION operation.

TEMPERATURE

OF THE

COMPRESSOR

A little higher than ambient temperature.

Equal to ambient temperature.



Low flowing sound of refrigerant is heard and frost forms in inlet only.

Flowing sound of refrigerant is not heard and there is no frost.

Lower than ambient temperature.



REMARKS

• Refrigerant level is low due

• to a leak.

• Normal cooling is possible by

• restoring the normal amount of

• refrigerant and repairing the leak.

• No discharging of Refrigerant.

• Normal cooling is possible by

• restoring the normal amount of

• refrigerant and repairing the leak.

• Normal discharging of the

• refrigerant.

• The capillary tube is faulty.

• Normal discharging of the

• Refrigerant.

• Cooling operation restarts

• when heating the inlet of the

• capillary tube.

• Low pressure at high side

• of compressor due to low

•

•

• refrigerant level.

• No pressure in the high pressure part of the compressor.

- 23 -

6-4-1 SEALED SYSTEM DIAGNOSIS

“Not Cooling” Complaint

All components operating, No airflow problems, Not frosted up as a defrost problem problem has been isolated to sealed system area

Partial

Frost

Pattern?

None

Very Fast

Equalization

Test

Very Slow Very Slow

Equalization

Test

Inefficient

Compressor

Fast

Partial

Restriction

Condenser

Temperature

Hotter than Normal

Complete

Restriction

Faint

Very Fast

Cap Tube

Sound

Room Temperature

Air/Low Side

Leak

Trace of Oil

Yes

Loss of Change

None to Weak

Compressor Not

Pumping

No

Leak

Undercharge

(The equalization test is trying to restart a compressor using a start kit after it has been operating.)

- 24 -

7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICEMAKER

7-1 OPERATION PRINCIPLE

7-1-1 Operation Principle of IceMaker

Power On

Start Position

Icemaking

Mode

Harvest

Mode

Park Position

• Adjusts EJECTOR to Start Position with power on.

• Waits until water becomes ICE after starting the

icemaking operation.

• Runs MOTOR to drop ice from the tray into the ICE BIN.

(During harvest mode, check if the ice bin is full)

• Reaches Start Position

Fill

• Performs Ice Making Mode after supplying water by operating

the SOLENOID in ICE VALVE.

Test Mode

• To operate LINE and SERVICE, press and hold the Fill Key

for 3 seconds. The icemaker will run through 3 stages:

Harvest Fill Icemaking.

1. Turning the Icemaker stop switch off (O) stops the ice making function.

2. Setting the Icemaker switch to OFF and then turning it back on will reset the icemaker control.

Cube Size

Indicator Light

EJECTOR

Cube Size

Selection Button

Power

Switch

Automatic

Shut off Arm

- 25 -

7-2 ICE MAKER FUNCTIONS

7-2-1. Icemaking Mode

1. Icemaking refers to the freezing of supplied water in the ice tray. Complete freezing is assured by measuring the temperature of the Tray with Icemaking SENSOR.

2. Icemaking starts after completion of the water fill operation.

3. The Ice Making function is completed when the sensor reaches 19°F (-7°C), 55 minutes after starting.

NOTE : After Icemaker Power is ON, the Icemaker heater will be on for test for 6 sec.

7-2-2. Harvest Mode

1. Harvest (Ice removing) refers to the operation of dropping ices into the ice bin from the tray when icemaking has completed.

2. Harvest mode:

(1) The Heater is ON for 30 seconds, then the motor starts.

(2) The feeler arm senses the quantity of ice in the ice storage bin while rotating with the EJECTOR.

A. Ice storage bin is full : The EJECTOR stops (heater off).

B. Ice storage bin is not full : The EJECTOR rotates twice to open for ice.

If the EJECTOR does not rotate once within 5 minutes in B mode, separate heater control mode starts operating to prevent the EJECTOR from being constrained. (It is recommended that the user open for ice to return to normal mode.)

7-2-3. Fill/Park Position

1. Once a normal harvest mode has been completed, the water solenoid will be activated.

2. The amount of water is adjusted by pressing the Fill Key repeatedly. This changes the time allowed for fill as illustrated in the table below.

Water supply amount TABLE

STAGE TIME TO SUPPLY INDICATIONS REMARKS

1 5 sec.

2

3

5.5 sec.

(FIRST STAGE)

6 sec.

The water amount will vary depending on the water control Switch setting, as well as the water pressure of the connected water line.

- 26 -

7-2-4 Function TEST

1. This is a forced operation for TEST, Service, cleaning, etc. It is operated by pressing and holding the Fill Key for 3 seconds.

2. The test works only in the Icemaking Mode. It cannot be entered from the Harvest or Fill mode.

3. Caution! If the test is performed before water in the icemaker is frozen, the ejector will pass through the water. When the

Fill mode begins (Stage 4), unless the water supply has been shut off, added water will overflow into the ice bin. If the control doesn’t operate normally in the TEST mode, check and repair as needed.

4. After water is supplied, the normal CYCLE is followed: icemaking

→ Harvest → Park Position → Fill.

5. Five seconds after Stage 5 is completed, the Ice Maker returns to MICOM control. The time needed to supply water resets to the pre- test setting.

Diagnosis TABLE

STAGE ITEMS INDICATOR

1

2

HEATER

MOTOR

REMARKS

Five seconds after heater starts, a heater will go off if the temperature by sensor is higher than 10°C

Five seconds after heater starts, you can confirm that a motor is moving.

3

4

HALL IC

I

HALL IC II

Check if Ice Bin is full or not.

If Ice bin is full, the motor and heater are off and on stand by until Ice bin is empty.

You can confirm HALL IC detection of start position.

5

6

VALVE

Reset

Return to Status prior to

TEST MODE

Two seconds after detection of start position, you can confirm that valve is on.

Five seconds after fifth stage is completed,

The icemaker resets to initial status.

7-3 DEFECT DIAGNOSIS FUNCTION

7-3-1 ERROR CODES shown on Ice Maker water supply control panel

NO DIVISION CONTENTS

1 Normal

INDICATOR

Mark time to supply

None

2

Icemaking

Sensor malfunction

Open or short-circuited wire

REMARKS

Display switch operates properly

Make sure that the wire on each sensor is connected.

- 27 -

8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM

8-1 FUNCTION

8-1-1 Function

1. When the appliance is plugged in, it is set to 37°F for Refrigerator and 0°F for freezer.

You can adjust the Refrigerator and the Freezer control temperature by pressing the ADJUST button.

2. When the power is initially applied or restored after a power failure, it is set to Control temperature Previously.

8-1-2 How to Toggle the Display between °F & °C

1. The initial setting is °F and the display temperature mode can be changed from °F to °C or °C to °F by pressing and holding the FRZ TEMP and the REF TEMP keys at the same time for over 5 seconds.

8-1-3 Lock function (dispenser and display button lock)

1. When the refrigerator is first turned on, the buttons are not locked. The display panel shows the padlock unlocked icon.

2. To lock the display, the dispenser, and the control panel, press and hold the LOCK button for 3 seconds. The locked pad lock icon is displayed.

3. The LOCK button is the only control feature that remains active in the locked state. The buzzer sound, other control buttons, and the dispenser are deactivated.

4. To release from the locked state, press and hold the LOCK button again for 3 seconds.

Press & Hold

8-1-4 Filter condition display function

1. There is a replacement indicator cartridge on the dispenser.

for the filter

2. Water filter needs replacement once six months or of using water filter.

3. Water Filter icon turn on to tell you need to replace the filter soon.

4. After replacing the filter, press and hold the lock button more than 3 seconds.

Water Filter icon turn off with reset status.

Classification

Filter Status

Display

In initial Power On

/ Filter RESET

Press & Hold

Ex) In selecting

"LOCK"

Ex) In selecting

"LOCK" again

Replace indicator light on

- 28 -

8-1-5 Ice Plus selection

Please select this function for quick freezing.

• Function is repeat Ice Plus Icon whenever pressing Ice Plus button.

• Ice Plus function automatically turns off after a fixed time passes.

8-1-6 Dispenser use selection

You can select water or ice.

∗ Select water, crushed ice, or ice cubes by cycling through the selections when pressing the DISPENSER button,

∗ Hold your cup in the dispenser for a few seconds after dispensing ice or water to allow the last pieoes of ice or drops of water to fall into the cup.

∗ When after initially establ ishing the water comes out, the water tank inside fills and until at the time of quality the hour is caught.

8-1-7 DISPENSER LIGHT

-Whenever pressed the LIGHT button, DISPLAY is changed as belows.

Pressing

Switch

Auto Auto on

Normal status: When dispenser is operated, DISPENSER LIGHT is ON.

AUTO status: Detecting the lighting of room by LIGHT SENSOR, DISPENSER LIGHT is on and off automatically.

ON status: DISPENSER LIGHT is on continuously.

8-1-8 CONTROL OF FREEZER FAN MOTOR

1. Freezer fan motor has high and standard speeds.

2. High speed is used at power-up, for Ice Plus, and when refrigerator is overloaded.

Standard speeds is used for general purposes.

3. To improve cooling speed, the RPM of the freezer fan motor change from normal speed to high.

4. High speed (2700RPM) : Initial power on or load corresponding operation, Ice Plus

Normal speed (2400RPM) : General working conditions.

5. Fan motor stops when refrigerator or freezer door opens.

8-1-9 Cooling Fan Motor

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

2. The cooling fan runs at a single speed.

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

8-1-10 Icing Fan

The Icing Fan is controlled by the the sensor on the top of the ice room.

The Failure sensing mathod is the same as in the fan motor of the freezer

(refer to failure diagnosis function table for failure display)

- 29 -

8-1-11 Ice Plus

1. The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.

2. Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.

3. If there is a power outage and the refrigerator is powered on again, Ice Plus will be canceled.

4. To activate this function, press the Ice Plus key and the LED will turn ON. This function will remain activated for 24 hrs.

The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be controlled at the lowest temperature. After 24 hours or if the Ice Plus key is pressed again, the freezer will return to its previous temperature.

5. During the first 3 hours:

(1) Compressor and freezer fan (HIGH RPM) run continuously.

(2) If a defrost cycle begins during the first 90 minutes of Ice Plus, the Ice Plus cycle will complete its cycle after defrosting has ended.

If the defrost cycle begins when Ice Plus has run for more than 90 minutes, Ice Plus will run for two hours after the defrost is completed.

(3) If Ice Plus is pressed during defrost, Ice Plus LED is on but this function will start seven minutes after defrost is completed and it shall operate for three hours.

(4) If Ice Plus is selected within seven minutes after compressor has stopped, the compressor (compressor delays seven minutes) shall start after the balance of the delay time.

(5) The fan motor in the freezer compartment runs at high speed during Ice Plus.

6. For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.

8-1-12 FREEZER & REFRIGERATOR LAMP AUTO OFF

1. To avoid heat damage caused by the lamp, it is turned off automatically when the refrigerator door is open for more than 7 minutes.

8-1-13 Alarm for Open Door

1. This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened.

2. One minute after the door is opened, the buzzer sounds three times each for 1/2 seconds. These tones repeat every 30 seconds.

3. The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds.

Freezer Door or Refrigerator

Door

Closed Open Closed Open

3 Times 3 Times 3 Times 3 Times

Closed

Buzzer

Within 1 min.

1 min.

30 sec 30 sec 30 sec

- 30 -

8-1-14 Defrosting (removing frost)

1. Defrosting starts each time the COMPRESSOR running time reaches 7 hours.

2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.

3. Defrosting stops if the sensor temperature reaches 46.4°F(8°C) or more. If the sensor doesn’t reach 46.4°F(8°C) in

2 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function, 8-1-15.)

4. Defrosting won’t function if its sensor is defective (wires are cut or short circuited)

8-1-15 Defect Diagnosis Function

1. Automatic diagnosis makes servicing the refrigerator easy.

2. When a defect occurs, the buttons will not operate; but the tones. such as ding. will sound.

3. When the defect CODE removes the sign, it returns to normal operation (RESET).

4. The defect CODE shows on the Refrigerator and Freezer Display.

✽ LED check function: If simultaneously pressing Ice Plus button and freezing temperature adjustment button for a second, display LED graphics on. If releasing the button, the LED graphic displays the previous status.

- 31 -

ERROR CODE on display panel

NO

Error Detection

Category

Normality

Error Display

Freezer

Temperature

Ref.

Temperature

1

2

3

4

5

6

7

8

9

Freezer Sensor

Error

Refrigerator

Sensor Error

Defrosting

Sensor Error

Icing Sensor

Error

Poor Defrosting

Abnormality of

BLDC FAN Motor for Ice Making

Abnormality of

BLDC FAN Motor for Freezer

Abnormality of

BLDC FAN Motor for Mechanic Room

Er

Er

Er

Er

Er

Er

Er

Er

FS rS dS

IS dH

IF

FF

CF

Error Generation Factors

None

Short or Disconnection of Freezer Sensor

Short or Disconnection of Refrigerator Sensor

Short or Disconnection of Defrosting Sensor

Short or Disconnection of Icing Sensor

Even though it is passed

1 hour since then

Defrosting , if Defrosting sensor is not over 8

°C

, it is caused

It is caused when F/B signal isn’t over 115 seconds during BLDC

FAN motor operating


FAN motor operating


FAN motor operating

Remark

Normal operation of

Display

Each Sensor have to check disconnection

Temperature Fuse

Disconnection,Heater disconnection, DRAIN Jam,

Poor Relay for Heater

Poor BLDC Motor connection, DRIVE IC, and

TR


TR


TR

10

Communication

Error

Er CO

Communication Error between Micom of Main

PCB and Display Micom

Poor Communication connection,Poor TR of

Transmitter and Receiver

- 32 -

8-1-16 TEST Mode

1. The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of an error.

2. The test mode is operated by pressing two buttons at Display panel.

3. While in the test mode, the function control button is not recognized, but the recognition tone sounds.

4. After exiting the test mode, be sure to reset by unplugging and then plugging in the appliance.

5. If an error, such as a sensor failure, is detected while in the test mode, the test mode is cleared and the error code is displayed.

6. While an error code is displayed, the test mode will not be activated.

Table 1. Function Test

MODE REMARKS

TEST1

TEST2

TEST3

RESET

OPERATION

Push FREEZER KEY and

LOCK KEY at the same time over 5 deconds OR

Push Test Switch (in the main Board) once.(See page 39)


LOCK KEY at the same time over 5 seconds in

TEST MODE 1 OR Push

TEST Switch once in TEST

MODE1.(See page 39)



TEST MODE 2 OR Push


MODE2.(See page 39)



TEST MODE 3 OR Push


MODE3.(See page 39)

FUNCTION

1) Continuous operation of the

COMPRESSOR and the Freezer fan

2) Stepping DAMPER OPEN

3) Defrosting HEATER OFF

4) DISPLAY LED all ON

1) Continuous operation of the

COMPRESSOR and the Freezer fan

2) Stepping DAMPER CLOSE

3) Defrosting HEATER OFF

4) DISPLAY LED shows no. 2

1) COMPRESSOR and the Freezer fan

OFF

2) Stepping DAMPER CLOSE

3) Defrosting HEATER ON

4) DISPLAY LED shows no. 3

Reset to the previously setting

Before TEST MODE.

Reset if the

Temperature of the

Defrosting Sensor is

46˚F(8˚C)or more.

The compressor will

Start after a 7-minute

Delay.

- 33 -

8-2 PCB FUNCTION

8-2-1 Power Circuit

1. Power is supplied to the control board at pin1 and 3 of connector #1.

- 34 -

8-2-2 Load / Fan & Open Door Detection Circuit

1. Load Drive Condition Check

To measure outputs of the control board, check voltages between the pins for the following components:

Circuit

I/Maker Pilot Valve

Lamp-R

Barrier Heater

Lamp-F

Def Heater

Water Pilot Valve

Compressor

Out Plate, Front, R-Door, L-Door Heater

Pin Number

Con3 Pin3

Con3 Pin9

Con3 Pin8

Con3 Pin7

Con3 Pin10

Con3 Pin11

Con3 Pin12

Con3 Pin5

Pin Number

Con3 Pin2

Con3 Pin2

Con3 Pin2

Con3 Pin2

Con3 Pin2

Con3 Pin2

Con3 Pin2

Con3 Pin2

Output Voltage

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer, the lamp of the freezer’refrigerator turns.

2-1. Freezing compartment fan

MOTOR OFF

MOTOR ON

Pin1 & 2 of con4

2V or less

13V~15V

- 35 -

2-2. Machine compartment fan

MOTOR OFF

MOTOR ON

Pin7 & 8 of con4

2V or less

13V~15V

2-3. Icing compartment fan

MOTOR OFF

MOTOR ON

Pin4 & 5 of con4

2V or less

13V~15V

- 36 -

3. Open Door Detection Circuit Check

Freezer/

Measurement

Location

Refrigerator Door

Closed

Open

8-2-3 Temperature Sensor Circuit

Pin 4 & 5 of con4 Ref.Door

Pin 5 & 6 of con5 Fre.Door

0 V

5 V

TEMPERATURE

- 20 ˚C (-4 °F)

- 15 ˚C (5 °F)

- 10 ˚C (14 °F)

- 5 ˚C (23 °F)

0 ˚C (32 °F)

+ 5 ˚C (41 °F)

+ 10 ˚C (50 °F)

+ 15 ˚C (59 °F)

+ 20 ˚C (68 °F)

+ 25 ˚C (77 °F)

+ 30 ˚C (86 °F)

+ 40 ˚C (104 °F)

+ 50 ˚C (122 °F)

RESISTANCE OF FREEZER/Icing

SENSOR

22.3 K

Ω

16.9 K

Ω

13.0 K

Ω

10.1 K

Ω

7.8 K

Ω

6.2 K

Ω

4.9 K

Ω

3.9 K

Ω

3.1 K

Ω

2.5 K

Ω

2.0 K

Ω

1.4 K

Ω

0.8 K

Ω

RESISTANCE OF REFRIGERATOR &

DEFROST SENSOR & ROOM SENSOR

77 K

Ω

60 K

Ω

47.3 K

Ω

38.4 K

Ω

30 K

Ω

24.1 K

Ω

19.5 K

Ω

15.9 K

Ω

13 K

Ω

11 K

Ω

8.9 K

Ω

6.2 K

Ω

4.3 K

Ω

• The resistance of the SENSOR has a ±5% common difference.

• Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature.

This delay is necessary due to sensor response speed.

- 37 -

8-2-4 Refrigeration Compartment Stepping Motor Damper Circuit

A reversible DC motor is used to open and close the damper.

To open the damper, push test button once.

To close the damper, push test button twice.

8-2-5 Dispenser Drive Circuit

Circuit

Auger Motor

Solenoid Cube

Pilot/ Water Valve

Solenoid Dispenser

Dispenser Lamp

Heater

Pin Number

Con2 Pin5

Con2 Pin3

Con2 Pin1

Con3 Pin9

Con3 Pin7

Con3 Pin5

- 38 -

Pin Number

Con2 Pin7

Con2 Pin7

Con2 Pin7

Con3 Pin3

Con3 Pin3

Con3 Pin3

Output Voltage

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

115 VAC

8-3 TROUBLESHOOTING

PROBLEM INDICATED BY

POWER

SOURCE is poor.

1. The whole

COOLING is poor.

2. DISPLAY LED

NO COOLING.

CHECK

1. FREEZER/

REFRIGERATOR.

CHECKING METHOD

Check if

FREEZER/REFRIGERA

TOR DOOR IS OPEN and check display.

CAUSE

POWER SOURCE is poor.

Check visually.

Applied voltage error.

SOLUTION

Replace Main PWB

2. If LAMP is dim.

3. The connection of the

MAIN PWB

CONNECTOR.

Replace

Main PWB

Reconnect

CONNECTOR

1. If the COMPRESSOR operate.

USE TEST MODE1

(forced COOLING).

If less than 7 minutes pass after compressor shuts off, don’t press the

KEY and wait.

COMPRESSOR locked or blocked.

OLP, PTC is poor.

COMPRESSOR RELAY is poor.

Replace OLP, PTC.

Replace MAIN PWB.

THE CONNECTING

WIRE is poor.

Replace

Main PWB

2. If refrigerant is leaking.

Check connection of

CONNECTOR.

Measure the amount of frost sticking on

EVAPORATOR and the surface temperature of the condenser pipe.

CONNECTOR connection is poor.

TRANS FUSE is open.

Refrigerant leakage.

Check the connection of the black wire of the

MAIN PWB

CONNECTOR (CON3).

Replace the leaking part and replace any lost refrigerant.

FREEZER

TEMPERATURE is incorrect

1. If FAN MOTOR operates.

USE TEST MODE1

(forced COOLING).

FAN MOTOR is poor.

Replace the FAN

MOTOR.

CONNECTING WIRE is poor.

Certify the MOTOR and the connection of the black wire of the MAIN

PWB CONNECTOR

(CON4).

2. If DEFROSTING is normal.

3. If SENSOR is normal.

4. Door Line contact.

Check the amount of frost sticking on the

EVAPORATOR .

DEFROSTING is poor.

of the Refrigerator

SENSOR.

Check the seal when the door is closed.

Door liner damaged.

See DEFROSTING is poor.

SENSOR RESISTANCE is poor.

Replace SENSOR.

Replace door liner.

- 39 -

PROBLEM INDICATED BY

COOLING is poor.

If

REFRIGERATOR

TEMPERATURE is too low.

CHECK

1. If FREEZER

TEMPERATURE is normal.

2. If amount of cool air from FAN MOTOR is sufficient.

CHECKING METHOD

Check is FREEZER

TEMPERATURE is too low.

Make sure that the amount and speed of cool air are sufficient by touching the check supplied on the

REFRIGERATOR.

CAUSE

FAN MOTOR is poor.

Passage of cool air is blocked.

EVA frozen.

DEFROSTIN

G is poor.

NO

DEFROSTING.

SOLUTION

Make sure the DOOR isattached.

Replace FAN MOTOR.

Remove impurities.

See DEFROSTING is poor.

Replace Door liner.

3. Door Line contact.

Check door seal when door is closed.

Door liner damaged.

1. If HEATER emits heat.

USE TEST MODE3

(forced DEFROSTING).

HEATER disconnection.

Replace HEATER.

TEMPERATURE FUSE disconnection.

Replace

TEMPERATURE FUSE.

2. If DRAIN PIPE is blocked.

3. If ice remains after

DEFROSTING.

Connection is poor.

Check EVAPORATOR connection and wire of

MAIN PWB

CONNECTOR.

DEFROST-SENSOR is poor.

Replace DEFROST-

SENSOR.

Check DRAIN PIPE.

HEATER RELAY is poor.

Replace RY3 of MAIN

PWB.

DRAIN PIPE is blocked.

Remove ice and impurities.

Check HEATER PLATE resistance.

Reassemble the

DEFROST-SENSOR.

Make sure that

DEFROST SENSOR is connected.

Connection is poor.

Make sure that

FREEZER

/REFRIGERATOR

DOOR is closed.

DOOR does not close properly.

Reassemble DOOR.

Replace GASKET.

- 40 -

8-4 MAIN PWB ASSEMBLY AND PARTS LIST

8-4-1 Main PWB Assembly

Connector7 Connector6 Connector5 Connector4

Test Switch

Connector1 Connector2

- 41 -

Connector3

8-4-2 Dispenser Drive PWB Assembly

Connector1

Connector2

Connector3

Connector4

- 42 -

9. EXPLODED VIEW & REPLACEMENT PARTS LIST

316A

CASE PARTS

CAUTION: Use the part number to order part, not the position number.

S03

S01

207B

402A

B01

271B

S01

103B

271C

103A

S03

207A

207C

S02

B01

501F

271B

402A

271A

406D

503D

410G

S02

50

0A

610A

S10

145B

411A

S11

409B

410A

409D

120B

626A

624D

607A

624C

282F

S08

624A

145A

S12

313A

282G

S11

158A

262B

S14

301A

406B

B02

400A

105A

318A

317A

S18

304A

314A

300A

303C

323B

420A

S20

312A

310B

327A

319C

329C

S19

319A

262H

410 H

106A

S15

610A

S14

249D

B03

249C

106A

409B

315B

315C

B03

283B

158B

4

07B

S16

315A

103C

407A

283B

B03

408A

332A

316B

405F

404A

405C

405B

329A

135D

315C

315B

S17

B04

- 43 -

FREEZER PARTS


145F

250C

250D

131A

250A

136B

250D

250C

145C

237C

136A

- 44 -

REFRIGERATOR PARTS


141B

141A

141B

141A

141C

141B

141A

141C

141B

140A

141C

140C

140B

161F

*

161C

*

161A

*

154B

*

154A

*

161D

140D

160B

14 1 D

167B

161C

*

160B

151C

151A

161E

*

161A

*

161D

*

*

: on ly LFX21960**

- 45 -

DOOR PARTS


241A

241C

230B

231B

233B 233C

23

4B

241B

233D

23

4A

230A

233A

231A

212G

147C

147B

147A

241

D

146A

241

E

▲

262C

243A

243B

S25

24

4A

281C

281F

281E

S34

250A

200A

615A

281F

281D

241G

241

F

237A

249A

250B

249G

249E

S34

205C

205A

*

203A

201A

B06

24

4A

▲

262C

S25

243A

243B

205B

250B

212D

B06

*

: on ly LFX25960**

▲ only for the service

249B

249F

249H

- 46 -

DISPENSER PARTS


278B

278A

278C

402C

278F

278D

405A

275A

276A

279B

279E

279D

501A 276B

280B

280C

281A

279A

- 47 -

ICE & MAKER PARTS


617A

616G

616G

623B

616H

623B

616H

603A

616 D

625A

616D

616F

627A

619A

603B

- 48 -

ICE BANK PARTS


606A

630J

600A

61 1 A

630E

630D

630F

630B

630C

630A

630L

630K

630M

630N

630H

630G

- 49 -

P/No. 3828JL8795A APR., 2006 Printed in Korea

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