Lg Lmx25964 series User manual

LG

REFRIGERATOR

SERVICE

MANUAL

CAUTION

BEFORE

SERVICING

THE

UNIT,

READ

THE

SAFETY

PRECAUTIONS

IN

THIS

MANUAL.

a

\L

MODEL

:

LMX25964**

COLOR

:

STAINLESS

CONTENTS

SAFETY

PRECAUTIONS.

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2

1.

SPECIFICATIONS.

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3

2.

PARTS

IDENTIFICATION

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3.

DISASSEMBLY

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5-14

REMOVING

AND

REPLACING

REFRIGERATOR

DOORS

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5

DOOR

INSTALLATION

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6

DOOR

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7-8

TO

REMOVE

THE

DISPENSER

20.

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8

DOOR

ALIGNMENT

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8

FAN

AND

FAN

MOTOR(Evaporat0r)

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8

ICE

FAN

SCROLL

ASSEMBLY

REPLACEMENT

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9

DEFROST

CONTROL

ASSEMBLY

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9

LAMP

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9

CONTROL

BOX-REFRIGERATOR

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9

MULT

DUCT

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10

MAIN

PWB,

DISPLAY

PWB

REPLACEMENT,

FUNNEL

REPLACEMENT.

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10

SUB

PWB

FOR

DISPENSER,

DUCT

DOOR

REPLACEMENT,

ICE

CORNER

DOOR

REPLACEMENT,

ICE

MAKER

ASSEMBLY

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11

AUGER

MOTOR

COVER,

AUGER

MOTOR

REPLACEMENT

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12

DOOR

ICE

BIN

0

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13

HOW

TO

REMOVE

AND

REINSTALL

THE

PULLOUT

DRAWER

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14-17

A.

ADJUSTMENT

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18-19

COMPRESSOR

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18

PTC-STARTER

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18

OLP(OVERLOAD

PROTECTOR)

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19

TO

REMOVE

THE

COVER

PTC

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19

5.

CIRCUIT

DIAGRAM

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20

6.

TROUBLESHOOTING.

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21-25

COMPRESSOR

AND

ELECTRIC

COMPONENTS.

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21

OTHER

ELECTRICAL

COMPONENTS.

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22

SERVICE

DIAGNOSIS

CHART

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23

REFRIGERATION

CYCLE

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24-25

7.

OPERATION

PRINCIPLE

&

REPAIR

METHOD

OF

ICEMAKER

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26-28

8.

DESCRIPTION

OF

FUNCTION,

CIRCUITS

&

ERROR

CODES

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29-45

9.

EXPLODED

VIEW

&

REPLACEMENT

PARTS

LIST

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46-

SAFETY

PRECAUTIONS

Please

read

the

following

instructions

before

servicing

your

refrigerator.

1.

2.

3.

Unplug

the

power

before

handling

any

electrical

componets.

Check

the

rated

current,

voltage,

and

capacity.

Take

caution

not

to

get

water

near

any

electrical

components.

.

Use

exact

replacement

parts.

.

Remove

any

objects

from

the

top

prior

to

tilting

the

product.

1.

SPECIFICATIONS

25

cu.

ft

ITEMS

SPECIFICATIONS

ITEMS

SPECIFICATIONS

DOOR

DESIGN

Side

Rounded

VEGETABLE

TRAY

Transparent

Drawer

Type

DIMENSIONS

(inches}

35

a/,

X

34

i,

X

69

s/,

(WXDXH)

25cu.ft

|

COMPRESSOR

Linear

NET

WEIGHT

(pounds)

308.65

(25cu.ft)

EVAPORATOR

Fin

Tube

Type

COOLING

SYSTEM

Fan

Cooling

CONDENSER

Spiral

Condenser

TEMPERATURE

CONTROL

Micom

Control

REFRIGERANT

R-134a

(145

g)

DEFROSTING

SYSTEM

Full

Automatic

Heater

Defrost

LUBRICATING

OIL

FREOLa8G

(180

ml)

DEFROSTING

DEVICE

SHEATH HEATER

DOOR

FINISH

Stainless

REFRIGERATOR

|

LED

Module(21)

LAMP

HANDLE

TYPE

Bar

FREEZER

Bulb

Lamp

INNER

CASE

ABS

Resin

INSULATION

Polyurethane

Foam

DIMENSIONS

a

“a

Description

LMX25964**

Depth

w/

Handles

A

34

1/4

in.

Depth

w/o

Handles

B

31

1/4

in.

Depth

w/o

Door

Cc

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)

|

44

1/4

in.

2.

PARTS

IDENTIFICATION

@

ADJUSTABLE

REFRIGERATOR

SHELVING

The

refrigerator

compartment

shelves

are

adjustable

Ice

Bank

to

allow

flexibility

for

storage needs.

Ice

Door

©

MODULAR

DOOR

BINS

Three

interchangeable

bins

can

be

arranged

to

suit

your

storage needs.

©

LED

INTERIOR

LAMPS

@

FIXED

DOOR

BIN

@

INTERIOR

LAMP

@

BOTTLE

HOLDER

(OPTIONAL)

3.

DISASSEMBLY

3-1

REMOVING

AND

REPLACING

REFRIGERATOR

DOORS

@

Removing

Refrigerator

Door

A

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.

.

Disconnect

door

switch

wire

harness.

Remove

cover.

.

Pull

out

the

tube(3).

.

Disconnect

the

two

wire

harnesses

(4).

Remove

the

grounding

screw

(5).

.

Rotate

hinge

lever

(6)

counterclockwise.

Lift

top

hinge

(7)

free

of

hinge

lever

latch

(8).

A

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).

A

CAUTION

:

When

lifting

hinge

free

of

latch,

be

careful

that

door

does

not

fall

forward.

5.

Lift

door

up

from

middle

hinge

door.

6.

Place

door,

inside

facing

up,

down

onto

a

non-scratching

surface.

oak

&

Figure

2

Figure

3

Figure

1

1)Insert

the

tube

until

you

can

see

only

one

of

the

lines

printed

on

the

tube.

2)Atter

inserting,

pull

the

tube

to

ascertain

that

it

is

secure.

3)Assemble

clip.

LER

ES

rect

Correct

Incorrect

3-2

DOOR

e@

Door

Gasket

Removal

1.

Remove

door

frame

cover

Starting

at

top

of

cover

and

working

down,

snap

cover

out

and

away

from

door.

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

Flat

Tip

Screwdriver

Gasket

Bracket

Figure

2

3.

Remove

gasket

Pull

gasket

free

from

gasket

channel

on

the

three

remaining

sides

of

door.

Figure

3

@

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.

Oo

LH

Bracket

Clip

|

Spring

ll

Door

Frame

Incorrect

Figure

4

Correct

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>

Pl

Yl

Fr

Correct

Incorrect

Figure

5

2)

Press

gasket

into

channels

on

the

three

remaining

sides

3-3

DOOR

ALIGNMENT

of

door.

.

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

8

a?

*

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.

nN

Figure

7

NN

FAN

MOTOR

SPA

(G

~~

GRILLE

Figure

9

CAUTION

DO

NOT

ATTEMPT

TO

REMOVE

THE

MULLION

:

REFRIGERANT

LINES!

*Ice

Fan

Scroll

Assembly

Replacement

3-6

LAMP

Unplug

Refrigerator,

or

disconnect

power

at

the

circuit

breaker.

If

necessary,

remove

top

shelf

or

shelves.

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.

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

Figure

13

FUSE-M.

4)

As

shown

below,

use

a

flat

tool

to

remove

the

cover

The

Defrost

Sensor

works

to

defrost

automatically.

It

is

lamp.

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)

Cover,

Lamp

LED,

Assembly

Case

Lamp

GRILLE

ASSEMBLY

DEFROST-CONTROL

Figure

14

ASSEMBLY

X

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.

Figure

10

Figure

11

CAUTION

DO

NOT

ATTEMPT

TO

REMOVE

THE

MULLION

:

REFRIGERANT

LINES!

Figure

15

3-7

MULTI

DUCT

3-9

DISPENSER

1)

Disconnect

funnel

and

button

assembly

by

pulling

down

and

forward.

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.

2)

Hold

the

left

and

right

side

of

the

“Cover

Assembly,

dispenser”

as

shown

in

the

picture,

and

pull

and

remove

it.

The

cover

3-8

MAIN

PWB

nispenser

is

attached

with

a

Figure

16

A

WARNING:

Unplug

the

refrigerator

before

removing

the

control

board.

1)

Loosen

3

screws

on

the

PWB

cover.

A

CAUTION

:

When

replacing

the

dispenser

cover

in

the

i

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

economy

3-10

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.

we

3-11

FUNNEL

REPLACEMENT

3-14

ICE

CORNER

DOOR

REPLACEMENT

1)

Pull

up

and

out

on

the

dispenser

cover

to

remove.

1)

Loosen

the

front

screw

as

shown

in

the

picture.

2)

Disconnect

the

wire

harness.

2)

Lift

up

the

hinge

with

one

hand.

3)

Replace

in

reverse

order.

3)

Pull

out

the

Ice

Corner

Door

with

the

other

hand.

3-12

SUB

PWB

FOR

WORKING

DISPENSER

1)

Loosen

the

screw

on

the

sub

PWB.

3-15

ICEMAKER

ASSEMBLY

1)

Loosen

two

screws

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.

2)

Disconnect

the

wire

harness

&

ground

screw

replace

thelcemaker

assembly

in

the

reverse

order

of

removal.

3-13

DUCT

DOOR

REPLACEMENT

Pull

up

and

out

on

the

dispenser

cover

to

remove.

Disconnect

the

wire

harness.

Remove

the

funnel

-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.

3)

Disconnect

wire

harness

of

motor

cover

assembly.

There

is

a

auger

motor

on

the

back,

as

shown

in

the

picture.

Icemaker

Power

&

Full

detection

Signal

-11-

3-17

HOW

TO

REMOVE

A

DOOR

ICE

BIN

3-18

HOW

TO

INSERT

A

DOOR

ICE BIN

1)

Grip

the

handles,

as

shown

in

the

picture.

1)

Insert

the

Ice

Bin,

slightly

tilting

it

to

avoid

touching

the

Icemaker.

(especially,

ice

maker

lever)

2)

Lift

the

lower

part

slightly.

*

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

aT

Step

3)

Remove

the

two

screws

from

the

guide

rails

(one

Step

4)

Removal

of

the

freezer

door

is

done

by

lifting

clear

from

each

side).

of

the

rail

support.

Fully

extend

both

rails.

Step

5)

Remove

only

1

screw

of

gear

ice,

and

disassemble

Step

6)

Remove

2

screws

of

both

side

of

supporter

covers

the

bar

and

gear

ice

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.

Assemble

a

bar

and

gear

ice

with

screw.

Push

the

otherside

of

the

gear

to

inside

of

the

bar.

Fini

a

innit

ee

-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.

Step

7)

Reinstall

the

two

screws

into

the

guide

rails

Step

8)

Reinstall

the top

drawer,

and

close

the

freezer

(one

from

each

side).

door.

-15-

3-20

WATER

VALVE

DISASSEMBLY

METHOD

3-21

FAN

AND

FAN

MOTOR

DISASSEMBLY

METHOD

1)

Turn

off

the

water.

Then

separate

the

water

line

from

the

1)

Using

a

short

screwdriver,

loosen

one

SCREW

in

DRAIN

valve.

PIPE

ASSEMBLY

and one

connected

to

the

MOTOR

COVER.

MOTOR

COVER

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.)

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.

Collet

Tube

7

mi

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

(1)

Remove

the

Cover

Back

M/C

(2)

Loosen

two

screws

on

comp

base

(3)

Use

a

L-shaped

flap

tool

to

pry

off

the

cover

(4)

Assembly

in

reverse

order

of

disassembly

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 value,

decrease

the

target

volt

by

3V.

-

Current

Trip

Current

trip

is

set

in

order-to

protect

compressor

mechanical

part.and

drive

from

the.overcurrent

that-might

arise

during

the

operation.

Check

the

current

for-every

416.7zs

and

ifthe

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

us.and

if

the

condition

fits

more

than.

three

times

at

Comp

ON,

The

Lock

Point

Trip

occurs.

-

1PM

fault-Trip

It

occurs.if

FO-signal

received

from

IPM.is

LOW.

For

every

416.7ys,

check

whether

FO

signal

is

LOW.

The

trip

occurs.

ifit.is

found

three

times

during

the

five

periods(83ms).

-18-

-6L

-

@

LG

Electronics

UIA

MEZ64036506

CIRCUIT

DIAGRAM

“EARTH

PART,

REACATOR

PART,

PLUG

TYPE

AND

COMP”

EARTH

PART,

FUSE

ON

CIRCLIE

DIAGRAM

ARE

SUBJECT

TO-

CHANGE

IN

DIFFERENT

LOCALITIES AND

MODEL

TYPE.

ICING-FAN

MOTOR

(BLDC)

C-FAN

MOTOR

#BLDC)

LEAN

MOTOR

(BLDC)

OISPENSER

LEVER

Sie

POWER

LIVE

FUSE

i

WATER

VALVE

BLSENSOR

SENSOR

D-SENSOR

PWB

ASSEMBLY,

DISPENSER

STEPPRIG

UNEAR

COMP

fo

MOE:

FA

DOOR

SW

CON201

EARTH

BART

CONT02

PWB

ASSEMBLY,

DISPLAY

NIVIN

‘ATSIWASSY

amd

CONTA

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VALVE

MAKER

HTR,

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FIGURANT

SUR

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DU

CIRCUIT

SONT

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MODIFICATION

SELON

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REGIONS

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LE

TYPE

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CALIMENTATION

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:

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BLAWH{BLUEMWHITE}

:

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BK(BLACK)

:

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:

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BN(BROWN):

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PK(PINK)

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6.

TROUBLESHOOTING

ERROR

CODE

on

display

panel

.

Error

Display

No

Error

Detection

Freezer

Ref.

Error

Generation

Factors

Remark

LG LMX25964 Series User manual

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