LG LTCS20020W Bedienungsanleitung

MODELS:

REFRIGERATOR

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic

means), publication, modification, copying or transmission of this Service Manual is STRICTLY

PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from

which you received this Service Manual. The material covered by this prohibition includes, without

limitation, any text, graphics or logos in this Service Manual.

LTCS20020W

CONTENTS

- 2 -

WARNINGS AND SAFETY PRECAUTIONS ......................................................................................

1. SPECIFICATIONS ...........................................................................................................................

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

3. DISASSEMBLY ...............................................................................................................................

4. TROUBLESHOOTING COMPRESSOR .........................................................................................

4-1 Compressor activation defect ....................................................................................................

4-2 Service Diagnosis Chart ............................................................................................................

5. COMPRESSOR ...............................................................................................................................

6. CIRCUIT DIAGRAM.........................................................................................................................

SAFETY PRECAUTIONS

Please read the following instructions before

servicing your refrigerator.

1. Check the refrigerator for current leakage.

2. To prevent electric shock, unplug before

servicing.

3. Always check line voltage and amperage.

4. Use standard electrical components.

5. Don't touch metal products in the freezer with

wet hands. This may cause frost bite.

6. Prevent water from spiling on to electric

elements or the machine parts.

7. Before tilting the refrigerator, remove all

materials from on or in the refrigerator.

8. When servicing the evaporator, wear gloves to

prevent injuries from the sharp evaporator fins.

9. Service on the refrigerator should be performed

by a qualified technician. Sealed system repair

must be performed by a CFC certified technician.

7. TROUBLESHOOTING.....................................................................................................................

7-1 Compressor and Electric Components ..........................................................................................22

7-2 PTC and OLP.................................................................................................................................23

7-3 Other Electric Components ...........................................................................................................24

7-4 Service Diagnosis Chart ................................................................................................................25

7-5 Refrigerating Cycle.........................................................................................................................26

8. CIRCUIT OF MICOM .......................................................................................................................27

8-1 Function .........................................................................................................................................

9. SMART DIAGNOSIS & DOOR ALARM ......................................................................................... 31

10. EXPLODED VIEW .........................................................................................................................50

Only training and service purposes.

1. SPECIFICATIONS

P C M S T S P C M

P o ck et H andle

2 full + 1 s m all

Ice B in

H um idity C o ntro l

M O LE C U LA R SIE VE XH -7

ID Ø 0.75

4 H o urs

7 - 40 H o urs

H eater, S heat h

E m bo ( N o rm al)

F in T ube T ype

W ire C o ndens er

P o lyo l E s ter (P O E ) R L-7H /7 cs t 220 ± 10 cc

G las s (1)

N/A

P las tic (2)

N o

G las s (2)

LE D (1)

F an C o o ling

M IC O M co nt ro l

F ull A uto m at ic

H eat er D efro s t

P o lyurethan

B M G110NHM V

29.9 x 33.9 x 66.1 in

STAINLESS

LTCS20020W

91.6 k g

20 cu f t

R600a

T em perat e (N )

115 V ~ / 6 0H z

Shelf

T ray m eat

T ray egg

B as k et, Q uantity

Lam p

Shelf

D es fro s ting D ev ice

C as e M ater ial

D o o r M aterial

H andle T ype

B as k et , Q uantity

Ice T ray & B ank

C o v er, T /V

Lam p

C o ndens er

Lubricanting O il

D rier

C apillary T ube

F irs t D efro s t

D efro s t C ycle

C o o lin g S ys t em

T em perat ure C o ntro l

D efro s ting Sys tem

Ins ulat io n

C o m pres s o r

E v apo rat o r

S P E C I F I C A T I O N S

C o lo r

D im ens io nes (W x D x H )

N et W eight

C apacity

R efrigerant

C lim ate C las s

R ated R ating

MODEL

SERUTAEFLARENEGROTAREGIRFERREZEERF

Use this page to become mo re familiar with the parts and features of your refrigerator. Page references are

included for your convenience.

NOTE: This guide covers several models. The refrigerator you have purchased may have some or all of the i tems

listed below. The locations of the features shown below may not match your model.

Custom Cube Icemaker

Refrigerator Light (LED)

Refrigerator Temperature Control

Shelves

Freezer Shelf

GCrispers

HFreezer Door Bins

IDairy Bin

JRefrigerator Door Bins

Freezer Temperature Control

2. PARTS IDENTIFICATION

If entrance is lees than 35 inch es wide, the refrigerator’s door will need to be removed.

IMPORTANT: Before starting, turn off and unplug the refrigerator. Remove all food and the racks from the doors.

TOOLS YOU MIGHT NEED OR USE

3/8 in

10 mm

Hex Socket Wrench Phillips Sc rewdriver No. 2 Flat Head Sc rewdriver Adjustable Wrench

WARNING

ELECTRICAL SHOCK HAZARD

Before you begin, either unplug the refrigerator or

turn off the power at the circuit breaker or fuse box.

Remove food and any door rack from the refrigerator.

Failure to do so could result in death or serious injury.

1. Removing Freezer Door

Gently pry off the Top Hinge Cover with a ﬂat head

screwdriver and remove it. See Fig. 1.

Using 10 mm or 3/ 8 inch socket wrench, remove

the three bolts and lift the Top Hinge (See Fig. 2). Set

parts aside.

Lift freezer door slightly and remove it (See Fig. 3) Set

parts aside.

2. Removing Refrigera t or Door

Loose and remove the two bolts and the screw to

remove the middle hinge bracket from refrigerator

housing (Figure 4). Set parts aside (Figure 5).

Lift up door slightly and remove it (See Figure 6).

Hinge Pin

Middle Hinge Bracket

Fig. 1

Fig. 3

Middle

Hinge Bracket

Fig. 4

Fig. 5

1/4 in

(For additional support on this topic, including helpful videos, please visit us at: www.lg.com).

Fig. 2

Middle

Hinge Bracket

3. DISASSEMBLY

To replace doors, begin with refrigerator door and then

follow with freezer door.

3. Replacing Refrigera tor Door

Set door on B ottom Hinge Pin (See Figure 7).

Place hinge pin of middle bracket inside the hinge pin

insert on the top of the door (See Figure 8). Hold the

door in place and line up the hinge with the holes in

the refrigerator housing.

Use the two bolts and the screw to refasten the middle

hinge with the refrigerator housing. See Figure 9.

4. Replacing Freezer Door

Set the freezer door onto the Middle Hinge pin (Figure

10).

Place upper hinge in the top of the freezer door and

line up the hinge with the holes in top of refrigerator.

Use the three bolts to fasten the hinge (See Figure 11).

Carefully, force the top hinge cover back into place over

hinge (See Figure 12).

REFRIGER TALLATION

Fig. 8

Fig. 9

Fig. 12

Bottom Hinge Pin

Fig. 6

Fig. 10

Fig. 7

REFRIGER TALLATION

Fig. 11

HOW TO REVERSEAND INSTALLTHE REFRIGER ATOR DOORS

You may ﬁnd it more convenient to have the doors converted from the left opening type (factory installed) to the right

opening type. Directions refer to the right side as the side on your right as you face the unit.

1. Removing Freezer Door

Gently pry off the top hinge cover with a ﬂat head

screwdriver and remove.

Using 10mm or 3/ 8 inch soc ket wrench, remove the

three bolts and lift off the top hinge. Set parts aside

Slightly lift up the refrigerator door and remove it.

Turn the freezer door upside d own on a non-scratch

surface. Loosen the screw to remove the Door

Closer/Stop and Hinge Pin Insert.

Move the Hinge Pin Insert Bracket to the other side of

the door, keeping the same orientation, and move the

Hinge Pin Insert into the hole on the left side of the

bracket.

Reverse the Door Closer/ Stop by ﬂipping it over. Place

on top of the Hinge Pin Inse rt Bracket, and tighten both

down with the screw.

Pry off the cover on the top left side of the refrigerator to

uncover the screw holes.

Set the freezer door and top hinge parts to the side and

remove the refrigerator door.

Hinge Pin

Middle Hinge Bracket

Hinge Pin

Insert Bracket

Hinge Pin Insert

Cover

(on top of

refrigerator)

WARNING

ELECTRICAL SHOCK HAZARD

TOOLSYOU MIGHT NEED OR USE

Hex Soc ket Wr ench Phillips Screwdriver No. 2 Flat Head Screwdriver

Before you begin, either unplug the refrigerator or turn off the p ower at the circuit breaker or fuse box. Remove

food and any door rack from the refrigerator. Failure to do so could result in death or serious injury.

2. Reversing and Reinst

alling Refrigerator Door

Using a ¼” socket wr

ench, loosen and remove Hinge

Pin fr

om the Middle Hinge Bracket. Remove washer

undernea

th the middle hinge and set aside.

NOTE: At this point the door

will be loose. Slightly lift the

door and remove it.

Loosen and remove the tw

o bolts and use the Phillips

head screwdriver to remov

e the Middle Hinge Bracket

from the refrigerat

or housing. Set parts aside.

Remove the washer fr

om the Bottom Hinge Pin.

Using a ¼” socket wr

ench, loosen and remove the

Hinge Pin from the Bott

om Hinge. Reattach the

Hinge Pin to the opposit

e side of the hinge.

NOTE:

WARNING:

This is easier to do

while the hinge is still

attached.

Using a 3/8’’ socket wrench with a 2-Inch extension

and screwdriver, loosen the two bolts and one screw, and

remove the Bottom Hinge from right side of the housing.

Remove the Decorative Caps on the bottom of the

refrigerator housing. You will need these holes for the

Bottom Hinge.

Move the Bottom Hinge to the left side of the housing,

keeping the same orientation, and reattach with the

two bolts and one screw. The ﬂat screw must be

placed on the exterior side of the hinge. Move the

Decorative Bolt to the hole on the lower right side

of the housing.

Turn the refrigerator door upside down on a

nonsc

to remove the Bottom Hinge Pin Insert Bracket

with the Hingr Pin Insert.

If you reinstall or replace doors, move

ratching surf

The leveler is only present on some models.

ace. Loosen the two screws

Leveler

the leveler to the opposite side.

Hinge Pin

Insert

Hinge

Pin Bracket

Door

Closer/

Stop

Door

Closer/

Stop

Hinge Pin

Insert

Hinge

Pin Bracket

With a ﬂat-head screwdriver, carefully pry off and

remove the cover over the screw holes on the left side of

refrigerator housing.

Remove the outer lower Decorative Screw from the

housing at the area between the freezer and refrigerator

doors. (You will need this hole for the Middle Hinge

Bracket.)

Flip the Middle Hinge Bracket, (ﬂange will now be on

top) position it on left side of the refrigerator and reattach

with two bolts and a Phillips screwdriver. Place the

refrigerator door down over the pin on the bottom hinge.

Place the washer between the refrigerator door and

middle hinge and re-attach Hinge Pin to Hinge Bracket

with a ¼” socket wrench.

NOTE: Bracke

NOTE:The Door Closer Stop is only presented on some

t has been ﬂipped, but Hinge Pin stays

in the same orientation with its hexagonal end facing

upward.

Insert the Decorative Screw into the outer hole on the

right side of the housing. Attach cover on the right side.

Cover is force-ﬁtted.

REATTACHING THE DOORS

Place the freezer door down over the Hinge Pin on the

Middle Hinge Pin Bracket.

Place the Upper Hinge Pin on top of the freezer door

and line up the Upper Hinge with holes on top of the

refrigerator. Use the three bolts to replace the Hinge.

Middle Hinge

Bracket

Flange

Decorative

Screw

Reverse the Door Closer/Stop by ﬂipping it over. Place

it on top of the Hinge Pin Insert Bracket, and tighten

both down with the screw. Tighten the Hinge Pin

Bracket to the door.

models.

Corners

Fig. 37

SHROUD

GRILLE

FAN MOTOR

FAN

BRACKET

After changing the doors, make sure that the corners of the

Door Gaskets are not folded over. To ensure a good seal,

apply a small amount of silicon grease on the corners of

gaskets.

CLOSING AND ALIGNING THE DOORS

To avoid vibration, the unit must be leveled. If necessary,

adjust the Leveling Legs to compensate for unevenness of

the floor. The front should be slightly higher than the rear to

aid in door closing.

Your refrigerator has three front leveling screws, one on the

right and one on the left. If your refrigerator seems unstable

or if you would like the doors to close more easily, simply

adjust the inclination of the refrigerator by following the

instructions below:

NOTE: Third leveling screw is used for protection of hinge

lower.

1. Plug the refrigerator into a 3 prong grounded outlet. Move

the refrigerator into its final position.

2. Use a flat head screwdriver to adjust the leveling screws

(see Figure A), turning clockwise to raise the side of the

refrigerator and counter-clockwise to lower it. It may take

several turns to adjust it to the inclination you would like.

NOTE: Having someone push against the top of the

refrigerator takes some weight off the leveling screws. This

will make it easier to adjust the screws.

3. Open both doors again and check to make sure that they

close easily. If not, tilt the refrigerator slightly more to the

rear by turning both Leveling Screws clockwise. It may take

several more turns, and you should turn both Leveling

Screws the same times.

Figure A

DOOR ALIGNMENT

If the space between your doors is uneven, follow the

instructions below to align the doors.

1. Gently pry off the refrigerator door Top Hinge Cover with

a flat head screwdriver and remove. Loosen the Top Hinge

Bolts using a 10 mm or 13/32inch socket wrench or

opened wrench.

2. Have a second person hold the refrigerator door in its

proper position.

3. Replace the Top Hinge Cover.

FAN AND FAN MOTOR

1. Remove the freezer shelf. (If your refrigerator has an

icemaker, unplug and remove the icemaker first).

2. Remove the screw of the grille fan.

3. Remove the grille by pulling it out.

4. Remove the Fan Motor assembly by loosening 4 screws

and disassemble the shroud.

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

Only training and service purposes.

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