LG LMX25981 series, LMX21981 Series, LMX25984ST, LMX2598105, LMX2198105 Service Manual

REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL : LMX25981** / 05

LMX21981** / 05

COLOR : STAINLESS(ST)

WESTERN BLACK SUPER WHITE

CONTENTS

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

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

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

3. DISASSEMBLY ............................................................................................................................................................. 5-14

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

DOOR INSTALLATION ....................................................................................................................................................... 6

DOOR .............................................................................................................................................................................. 7-8

TO REMOVE THE DISPENSER ......................................................................................................................................... 8

DOOR ALIGNMENT ........................................................................................................................................................... 8

FAN AND FAN MOTOR(Evaporator) .................................................................................................................................. 8

ICE FAN SCROLL ASSEMBLY REPLACEMENT ...............................................................................................................9

DEFROST CONTROL ASSEMBLY .................................................................................................................................... 9

LAMP .................................................................................................................................................................................. 9

CONTROL BOX-REFRIGERATOR .................................................................................................................................... 9

MULTI DUCT .................................................................................................................................................................... 10

MAIN PWB, DISPLAY PWB REPLACEMENT, FUNNEL REPLACEMENT ..................................................................... 10

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

REPLACEMENT, ICE MAKER ASSEMBLY ..................................................................................................................... 11

AUGER MOTOR COVER, AUGER MOTOR REPLACEMENT ........................................................................................ 12

DOOR ICE BIN ................................................................................................................................................................. 13

HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER .............................................................................. 14-17

4. ADJUSTMENT ............................................................................................................................................................ 18-19

COMPRESSOR ................................................................................................................................................................ 18

PTC-STARTER ................................................................................................................................................................. 18

OLP(OVERLOAD PROTECTOR) ..................................................................................................................................... 19

TO REMOVE THE COVER PTC ...................................................................................................................................... 19

5. CIRCUIT DIAGRAM ......................................................................................................................................................... 20

6. TROUBLESHOOTING ................................................................................................................................................ 21-25

COMPRESSOR AND ELECTRIC COMPONENTS .......................................................................................................... 21

OTHER ELECTRICAL COMPONENTS ............................................................................................................................ 22

SERVICE DIAGNOSIS CHART ........................................................................................................................................ 23

REFRIGERATION CYCLE .......................................................................................................................................... 24-25

7. OPERATION PRINCIPLE & REPAIR METHOD OF ICEMAKER .............................................................................. 26-28

8. DESCRIPTION OF FUNCTION, CIRCUITS & ERROR CODES ................................................................................ 29-45

9. EXPLODED VIEW & REPLACEMENT PARTS LIST ..................................................................................................... 46-

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 SPECIFICATIONS

DOOR DESIGN

DIMENSIONS (inches)

NET WEIGHT (pounds)

COOLING SYSTEM

TEMPERATURE CONTROL

DEFROSTING SYSTEM

DOOR FINISH

HANDLE TYPE

INNER CASE

INSULATION

DIMENSIONS

Side Rounded

35 3/4X 30 1/4X 69 3/4(WXDXH) 21cu.ft

/4X 34 1/4X 69 3/4(WXDXH) 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 SPECIFICATIONS

VEGETABLE TRAY

COMPRESSOR

EVAPORATOR

CONDENSER

REFRIGERANT

LUBRICATING OIL

DEFROSTING DEVICE

REFRIGERATOR

LAMP

FREEZER

Opaque Drawer Type

Recipro

Fin Tube Type

Wire Condenser

R-134a (150 g)

ISO10 (280 ml)

SHEATH HEATER

LED Module(27)

LED Module(9)

Description LMX21981** /05 LMX25981** /05

Depth w/ Handles

Depth w/o Handles

Depth w/o Door

Depth (Total with Door Open)

Height to Top of Case

Height to Top of Door Hinge

Width

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

Width (door open 90 deg. w/ handle)

- 3 -

30 in.

27 1/2 in.

23 5/8 in.

42 1/4 in.

68 3/8 in.

69 3/4 in.

35 3/4 in.

39 1/4 in.

44 1/4 in.

34 1/4 in.

31 1/4 in.

27 7/8 in.

46 1/2 in.

68 3/8 in.

69 3/4 in.

35 3/4 in.

39 1/4 in.

44 1/4 in.

2. PARTS IDENTIFICATION

ADJUSTABLE REFRIGERATOR SHELVING

The refrigerator compartment shelves are adjustable to allow flexibility for storage needs.

MODULAR DOOR BINS

Three interchangeable bins can be arranged to suit your storage needs.

REMOVABLE ICE STORAGE BIN

The ice storage bin can be removed to fill ice buckets,coolers,or pitchers.

INTERIOR LAMPS

Two separate LED arrays light the freezer and refrigerator interiors.

FIXED DOOR BIN

- 4 -

3. DISASSEMBLY

3-1 REMOVING AND REPLACING REFRIGERATOR DOORS

●

Removing Refrigerator Door

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

▶

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 (2). Lift up cover.

3. Disconnect door switch wire harness. Remove cover.

4. Pull out the tube (3).

5. Disconnect the three wire harnesses (4). Remove the grounding screw (5).

6. Rotate hinge lever (6) counterclockwise. Lift top hinge (7) free of hinge lever latch (8). CAUTION : When lifting hinge free of latch, be careful that door does not fall forward.

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

▶

Right Door -FIG. 3

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

2. Disconnect door switch wire harness. Remove cover.

3. Disconnect wire harness (3).

4. Remove the grounding screw (4).

5. Rotate hinge lever (5) clockwise. Lift top hinge (6) free of hinge lever latch (7). CAUTION : When lifting hinge free of latch, be careful that door does not fall forward.

6. Lift door up from middle hinge pin door.

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

Figure 2 Figure 3

Figure 1

- 5 -

1)Insert the tube until you can see only one of the lines printed on the tube.

2)After inserting, pull the tube to ascertain that it is secure.

3)Assemble clip.

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

Door

Bracket Clip

Frame

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.

Flat Tip

Screwdriver

3. Remove gasket

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

Gasket

Bracket

Figure 2

Figure 3

- 6 -

Incorrect

Correct

Figure 5

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

Figure 6

3. Replace door frame cover

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

3-3 DOOR ALIGNMENT

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

1. Remove the Base Grillie.

2. Turn the leveling legs (CCW) to raise or (CW) to lower the height of the front of the refrigerator by using flat blade screw driver or 11/32" wrench.

3. Use the wrench (Included with the User Manual) to adjust the bolt in the door hinge to adjust the height. (CCW to raise or CW to lower the height.)

Figure 8

Figure 7

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

- 7 -

GRILLE

CAUTION

DO NOT ATTEMPT TO REMOVE THE MULLION :

REFRIGERANT LINES!

Figure 9

* 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 all screws.

(1) (2)

(3) (4)

3-6 LAMP

Unplug Refrigerator, or disconnect power at the circuit breaker. If necessary, remove top shelf or shelves.

3-6-1 Refrigerator Compartment Lamp

1) Release 2 screws.

2) Hold both ends with your both hands and pull it downward to remove it.

Figure 12

3) Use a flat tool as shown below to remove the cover lamp.

3-5 DEFROST CONTROL ASSEMBLY

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 46°F (8°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 10)

2. Separate the connector with the Defrost Control assembly and replace the Defrost Control assembly after cutting the Tie Wrap. (Figure 11)

GRILLE ASSEMBLY

Figure 10 Figure 11

CAUTION

DO NOT ATTEMPT TO REMOVE THE MULLION :

REFRIGERANT LINES!

DEFROST-CONTROL ASSEMBLY

Figure 13

4) As shown below, use a flat tool to remove the cover lamp.

Cover, Lamp

3-6-2 Freezer Compartment Lamp

1. Unplug refrigerator power cord form outlet.

2. Remove screw with driver.

3. Grasp the cover Lamp, pull the cover downward.

LED, Assembly Case Lamp

Figure 14

Figure 15

- 8 -

3-7 MULTI DUCT

1. Remove the upper and lower Caps by using a flat screwdriver, and remove 2 screws. (Figure 16)

2. Disconnect the lead wire on the bottom position.

3-8 MAIN PWB

1) Loosen the 3 screws on the PWB cover.

Figure 16

3) If nozzle is interfered with button , push and pull out the bottom of button.

CAUTION : When replacing the dispensor 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 dispensor,

4) Rmove the connected part of Lead wire.

3-10 DISPLAY PCB

As shown below, remove 1 case PCB fixing screw. Remove the display PCB fixing screw.

2) Remove the PWB cover

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

3-9 DISPENSER

Case, PCB Display PCB

3-11 ICE BUTTON ASSEMBLY

1) Remove the screw fixing the button lever.

2) Push the spring from the hanging hook to remove it.

3) Apply some pressure to the rib in ① direction and lift the button in ② direction.

Button Lever

3-12 FUNNEL REPLACEMENT

Pull down and forward.

1) Pull out the darin 2) Hold the inner side of cover dispenser with both hands at the handle side to pull it out forward.

- 9 -

3-13 WATER BUTTON ASSMEBLY

1) Romove screws.

2) Grasp the Button assembly and lift up.

Button Lever

3-16 ICEMAKER ASSEMBLY

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

3-14 DUCT DOOR REPLACEMENT

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

2) Disconnect the wire harness.

3) Remove the funnel

4) Replace in reverse order.

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.

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 -

3-20 HOW TO REMOVE A DOOR ICE BIN

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

2) Lift the lower part slightly.

3-21 HOW TO INSERT A DOOR ICE BIN

1) Insert the Ice Bin, slightly tilting it to avoid touching the Icemaker. (especially, ice maker lever)

※ Insert the ice bucket carefully avoid contacting the

automatic shut off arm.

3) Take the Ice Bin out slowly.

- 12 -

3-22 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER

3-22-1 Follow Steps to Remove

Step 1) Open the freezer door.

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

from each side).

Step 2) Remove the lower basket.

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 -

3-22-2 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 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 3) Insert the rail into the left side gear, and insert the

gear into the clip.

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 -

3-23 WATER VALVE DISASSEMBLY METHOD

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

3-24 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

3) Separate the housing and pull out the valve.

Housing

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.

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

FAN ASSEMBLY

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.)

MOTOR

Collet

Tube

Insert Line

Clip

- 15 -

3-25 TOP DRAWER

To remove the freezer drawer, pull the drawer open to full extension. Remove the drawer and Ice Bin lifting the basket from the rail system.

3-26 BOTTOM DRAWER

To remove the freezer drawer, pull the drawer open to full extension. Remove the lower DuraBase ®basket by lifting the basket from the rail system.

- 16 -

+ 36 hidden pages

LG LMX25981 series, LMX21981 Series, LMX25984ST, LMX2598105, LMX2198105 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual