LG LMX25964 User Manual

REFRIGERATOR

SERVICEMANUAL

CAUTION BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL" LMX25964** COLOR • STAINLESS

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

25 cu. ft

ITEMS

DOOR DESIGN

DIMENSIONS (inches) NET WEIGHT (pounds)

COOLING SYSTEM

TEMPERATURE CONTROL

DEFROSTING SYSTEM

DOOR FINISH HANDLETYPE INNER CASE

INSULATION

DiMENSiONS

SPECIFICATIONS

Side Rounded

353/4X 34 ,/4X 69 3/_(WXDXH) 25cu.ft

308.65 (25cu.ft)

Fan Cooling Micom Control

Full Automatic Heater Defrost Stainless Bar ABS Resin

Polyurethane Foam

ITEMS

VEGETABLE TRAY COMPRESSOR

EVAPORATOR

CONDENSER

REFRIGERANT

LUBRICATING OIL DEFROSTING DEVICE

REFRIGERATOR

LAMP

FREEZER

SPECIFICATIONS

TransparentDrawerType Linear

Fin Tube Type

Spiral Condenser R-134a (145 g) FREOLa8G (180 ml)

SHEATH HEATER

LED Module(21)

Bulb Lamp

i! G

iii i

Description LMX25964**

Depth w/Handles A 34 1/4 in. Depth w/o Handles B 31 1/4 in. Depth w/o Door C 27 7/8 in.

Depth (Total with Door Open) D 46 1/2 in. Height to Top of Case E 68 3/8 in.

Height to Top of Door Hinge F 69 3/4 in.

Width G 35 3/4 in. Width (door open 90 deg. w/o handle) H 39 1/4 in.

Width (door open 90 deg. w/handle) I 44 1/4 in.

-3-

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.

_) LED INTERIOR LAMPS _) FIXED DOOR BIN

O INTERIOR LAMP

BOTTLE HOLDER (OPTIONAL)

Ice Bank

Ice Door

-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. 1_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 two 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).

4. 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.

5. Lift door up from middle hinge pin door.

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

Figure 2

(7) /

(3).

(2)

(8)

_(1)

Figure 3

(1)_

(3)_-4_

(2)

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.

Incorr_ct

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.

Frame

Figure 1

• 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.

Bracket Clip [] .

Spring

/I, il

Door -..

Frame

Correct Incorrect

Figure 4

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 /_ II ,_ Bracket Clip

Frame ,_ ___"L

Flat Tip _ II \

Screwd river___l.. _..T_.._-"

Jll III Ill II W Gasket

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

Bracket

Figure 2

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.

Correct

Incorrect

Figure 5

Figure 3

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. 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.)

t,,f,_,

ttFtt:

Figure 7

Figure 8

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

-7-

GRILLE Figure 9

CAUTION

DO NOT ATTEMPT TO REMOVE THE MULLION •

REFRIGERANT LINES!

* 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

DEFROST-CONTROL

ASSEMBLY

Figure 10 Figure 11

CAUTION

DO NOT ATTEMPT TO REMOVE THE MULLION •

REFRIGERANT LINES!

Figure 13

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

Cover, Lamp LED, Assembly Case Lamp

Figure 14

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.

-8-

Figure 15

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.

3-9 DISPENSER

1) Disconnect funnel and button assembly by pulling down and

forward.

Figure 16

3-8 MAIN PWB

_k WARNING : Unplug the refrigerator before removing the

control board.

1) Loosen 3 screws on the PWB cover.

2) Remove the PWB cover

2) Hold the left and right side of the "Cover Assembly,

dispenser" as shown inthe picture, and pull and

remove it. The cover

dispenser is attached with a

hook.

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.

3-10 DISPLAY PWB REPLACEMENT

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

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

2) Follow the steps in the pictures

-9-

3-11 FUNNEL REPLACEMENT

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

2) Disconnect the wire harness.

3) Replace in reverse order.

3-12 SUB PWB FOR WORKING DISPENSER

1) Loosen the screw on the sub PWB.

3-14 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.

3-15 ICEMAKER ASSEMBLY

1) Loosen twoscrews as shown in the first picture.

2) Pull the sub PWB down.

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

3-13 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.

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

3) It separates a ground connection screw.

-10-

3-16 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

Icemaker Power & Full detection Signal

-11 -

3-17 HOW TO REMOVE A DOOR ICE BIN

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

2) Lift the lower part slightly.

3-18 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-

3-19 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER 3-19-1 Follow Steps to Remove

Step 1) Open the freezer door. Step 2) Remove the top drawer

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

from each side).

Step 5) Remove only 1 screw of gear ice, and disassemble

the bar and gear ice

Step 4) Removal of the freezer door is done by lifting clear

of the rail support. Fully extend both rails.

Step 6) Remove 2 screws of both side of supporter covers

tv and disassemble the supporter cover tv.

-13-

3-19-2 Follow Steps to Reinstall

Step 1) Insert both side of supporter cover tv into connector rails, and then screw them.

Step 2) (_ Assemble a bar and gear ice with screw.

2_ Push the otherside of the gear to inside of the bar.

Step 3) Put gear ice assembled with the bar by screw into connector rail's hole.

Step 4) Insert opposite gear ice into connector rail and screw them

-14-

Step 5) 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 6) Reinstall the freezer door by inserting the rail tabs

into the guide rail.

* Assemble them like as pictures

Step 7) Reinstall the two screws into the guide rails

(one from each side).

Step 8) Reinstall the top drawer, and close the freezer

door.

-15-

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.

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 MOTOR

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.)

Collet --

Tube --

Insert Line

Clip --

-16-

3-22 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.

3-23 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.

-17-

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 Note for Usage (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 Cover PTC Compressor may fail due to breakdown of their insulating capabilities.

(4) Always use the Parts 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.

4-1-3 Remove the cover PTC

4-1-4 Compressor protection logic

• Since linear Comp conducts linear reciprocating motion,

we have protection logic for compressor, motor and PCB as the below.

- Stroke Trip During the operation, if stroke is above the target vaJue,

decrease the target volt by 3V.

- Current Trip

Current trip is set in order to protect compressor mechanical part and drive from the overcu rrent that might

arise during the operation. Check the current for every 416.7,s and if the Trip exceeds 1.86Arms more than three times at Comp ON,

forcibly stop and restart six minutes later.

- Lock Piston Trip If stroke is under 5mm even if the current is more than

14Arms, Take it as 'piston lock' and restart after 2'30" of

Comp OFF. Check the current and stroke for every

416.7,s and if the condition fits more than three times at Comp ON, The Lock Point Trip occurs.

- IPM fault Trip It occurs if FO signal received from IPM is LOW. For

every 416.7_s, check whether FO signal is LOW. The trip occurs if it is found three times during the five

periods(83ms).

(1) Remove the Cover Back M/C

(2) Loosen two screws on comp base

(3) Use a L-shapedflap tool to pry off the cover (4) Assembly in reverse order of disassembly

-18-

LG Electronics IIIIlllllllllllIIIIIIll C_RCUUTD_AGRAM

MEZ64036506

*pIECE DE M_E A LA TERRE REACTEIJR _ARTI E WP DE PRISE ET OE MIS A _ TERRE DU CO_pRESSEUR

]

€0

_W(N)

ICEMAKERKI-

BK(BLACK):NOIR B_(BLUE):BLEU BN(BROWN): MARRON BO(BRIG_TORANGE): ORANGEBRILLANT GY(GRAY):GRIS RD(RED): ROUGE WH/RD(W_ITE/RED): BLANC/ROUGE BNtWH(BROWN/WHITE}: MARRON/BLANC R_YL(RED/YELLOW): ROUGE_AUNE YL(YELLOW):JAUNE GN(GREEN}: VERT PR(PURPLE):PURPLE WH(WHITE):BLANC WH/BK(WHITE!BLACK):LANC!NOIR YUBK(YELLOW/BLACK}:JAUNE/NOIR P_WH(PURPLE_HITE): VlOLE_BLANC BL/RD(BLUEiRED}:BLEU!ROUGE SB(SKYBLUE): BLEU/BLANC PK(PINK): ROSE GN/YL(GREEN/YELLOW): VERT!JAUNE BL_H(BLUE_HITE) : BLEU/BLANC RDANH(RED_HITE):ROUGE/BLANC GY/W_(GRAY/WHITE): GRIS/BLANC BOIBL(BRIGHTO_NG_LUE} :ORANGEBRILLAN_BLEU BOeVH(BRIGHTORAN6E_HITE):ORANGEBRILLANT_BLANC

6. TROUBLESHOOTING

ERROR CODE on display panel

Error Detection

3 Er rS Refrigerator Sensor

4 Er dS Defrosting Sensor

5 Icing Sensor Error Er IS