Kenmore 4666812 Manuale utente

tTECHNICAL FLASH

DISTRICTMANAGER

CENTRAL

MANAGER

BRANCED{ANAGNR

CALL CENTRN

MANAGER T. F. 4ffi9

PARTSMANAGER JIINE 2OOI

LORNE

DIVELL - DEPARTMENT73IA

DEPT.731A

DIVISION 46

souRcE L.G.s.501

ERVICE

INFORMATIO

L.G.S.

(COLDSPOT

)REFRTGERATOR

MODEL

:66812

NOTE:FORPARTS

ORDERING

USE

DIVISION46SOURCE

501

REFRIGERATOR

SERVICEMANUAL

CAUTION

BEFORE

SERVICING

THE

UilIT,READfiE 'SAFETY

PRECAUTIONS'lNTHIS

IT|ANUAL

MODEL:

t 66812

"-:;':"""j;':"':'..g-:""'.:- ...

,..,i. .i1 :\i. *-i. , .; r.:,.

'* j Tr € 'i. .;4-,"" r-..i -. i.- :..,. :i.e' -L.i

CONTENTS

SAFETY

ECAUTIONS

............... ..........2

SERVtCTNGPRECAUT|ONS................

..8

CoMPRESSORANDELECTRTC

COMPONENTS............... ........

*i, l'..

SAFETY

PRECAUTIONS

Pleasereadthe

followinginstructionsbefore

servicing

youl

refrigerator.

1.Checktherefrigerator

for

cunent

leakage.

2.To

prevent

electricshock,

unplug

beloreservicing.

3.Always

check

linevollageandamperage.

4.lfyou

useany

kindofappliance,

check

regularcurrent,

roltageandcapacity.

5.Don'ltouch

metal

products

inthe

lreezerwith

wel

hands.

Thismaycause

frostbite.

6.Preventwater

fromfollowing

ontoelectricelements

themechanical

parts.

7.Closethe

top

doorbeforeopeningthe

bottom

door.

Otherwise,

you

mighthit

your

head

when

you

standup.

8.When

tiltingtherefrigerator,removeanymaterials

the

refrigerator,

especiallythathin

plates(ex.

Glass

shelforbooks.)

9.When

servicingthe

evaporator,

wearcotton

gloves.

Thisistoprevent

injuriesfromlhesharpevaporalor

fins.

10.Leavethedisassemblyoftherelrigerating

cyeletoa

specialized

service

center.

The

gas

inside

thecircuit

may

pollute

lhe environment.

-2-

SERVICING

PRECAUTIONS

|arn

necnaRGrNGrN

coMPREssoR

./Test

the

relrigeration

syslem

connecting

itelectrically

before

refilling

operalion.

llisnecessary

toascertain

thefunction

ofth€motor-compressor

and

identily

the

defects

immedialely,lldefectshave

beenfound,

emptythe

old

syslom

possiue

R-l34aresidue

bybreaking

off

theend

lhe

exlenslon

piece

atitsnarrow

point.

(Figure

Replace

lhe

filter

and

any

damaged

components.

Unsolder

and

pull

olf

lhe

piece

remaining

inside

theservicetube

and

lhen

allachancomplete

extensionwith

maleHansen

and

tl laal,

solder

ittothesame

tube

again.

(Figure

ll lsnecessary

lo €xecute

the

soldering

operation

with

valve

open

solhalthefumes

caused

oilresidue

can

como

oulfreelywilhoul

blowholes

between

twotubes

durlngtheheating

theoflhe point

tobesoldered.

Theextensionlitted

withthemaleHansen

isconnected

lhc female

littingofthevacuumpump

tube.

(Figure

Airevacuating

from

thesysiem

begins

assoonas

lhe

pump

starls.Therefrigeration

systemmust

bekept

under

vacuum

untillhereading

onthe

low-pressuregauge

indicales

vacuum

absolute,

-1

atm.,

.760

mmhg)

any

caseitisadvisable

tokeep

the

pump

running

for

about

minutes.

(Figure

Incase

thataconsiderableleakage

occurs

itwill

necessary

tostopthevacuum

pump

andtoadd

asmall

quantity

ofFreon

tothesystem,.if

vacuum

shouldnot

obtained

(pressure

gauge

can'tfall

to1

atmosphere),

start

therefrigeration

unitandfind

theleakagewith

the

special

leak-finder.

Whenthe

delective

soldering

point

isvisible,

re-do

itafteropeningtheextension

tubevalve

and

reestablishing

thenormal

outside

pressure

inside

the

group.

Because

themeltedallgyissuckedinto

thetubesand

blockthem,the

pressure

must

berebalanced

when

vacuum

isin

thesysteminsoldering.As

soonasthe

TOTHER-134A

CYLINDER

TOTHE

REFRIGERATION

SYSTEM Flgure 4

Iaclum operation

isover,

add

the

quantity

ingrams

R-134a

totherefrigeration

system.

RemehOei

that

every

system

has

exact

quantity

ofR-134a

with

atolerance

t5 grams

that

canbeadded.

(Figure

Before

performing

thisoperation

(if

thevacuum

pump

and

refilling

cylinder

areconnected),

make

sure

that'theialve

placed

between

thevacuum

pump

and

therefilling

tubeare

closed

inorder

tokeep

theFreon

for

addition

totFesystem.

(Figure

addition,

check

the

graduated

scale

thecylinderlor

the

quantity

olR-13a tobeadded,

for

example,ifwe

have

750

grams

olFreon

the

cylinder

andmust

add140

grams

tothe

group,

lhis

amount

willbereached

when

R-134a

hasdropped

to610

grams,

remembering

that

the

indicator

shows

alower

limit

ofmeniscus.

this

after

choosing

the

scale

corresponding

tothe

gaspressure

different

scales

reported

asthesame

gas

pressure

indicated

the

pressure

gauge

thetopofthe

column.

Tomake

R-134a

flow

into

the

system,open

the

valve

placed

atthe

base

ofthe

cylinder

andconnected

tothe

filling

tube.The

amount

ofFreoncannot

beadded

tothe

systemall

atonce

because

itmay

cause

ablockingofmotor-

compr€ssor.

Therefore,

proceed

adding

theoriginal

quantity

ofabout

20-30

grrams

and

thevalrre

immediat€ly.

The

pressure

rises

and

the

motorcompressor

must

start

sucking

the

gas

andlowering

the

pressure

again.Regulate

the

valve

again,

maintaining

thesame

manner

until -

reaching

tothe

quantity

ofR-134a

established

forthe

system

beingcharged.

When

the

systemisrunning,

the

suction

pressure

musl

stabilized

between

0.30to.

0.6(0.10

to0.4)atmosphere.

CHARGETUBE

EXTENSION

MALE

HANSEN

SERVICE

TUBE

EXTENSION SOLDERING

POINT

Flgure 1 Figure 2

FEMALE

HANSEN

FILLING

OR VALVE

OPENEO

CHABGE

TUBE WHEN

REFILLING

TOTHE

CHABGE

CYLINDER

VALVE

TOBECLOSED

AFTER

VACUUM

Flgure

-3-

SPECIFICATIONS

Ref.

No.:

66812

750x723x1732(WxDxH)

NET

WEIGHT

(kg)

COOLING

SYSTEM

DEFROSTING

SYSTEM

FullAutomatic

Heater

Defrost

Wilh

aTimer

ITEMS SPECIFICATIONS

VEGETABLE

TRAY Transparent

Drawer

Type

COMPRESSOR PTC

Starting

Type

EVAPORATOR Fin

Tube

Type

CONDENSER Wire

Condenser

REFBIGERANT R-134a(140

LUBRICATING

OIL Freol

@l5G

(310cc)

DEFROSTING

DEVICE SHEATH

HEATER

LAMP I REFRIGERATOR

40w

-4-

2.PARTS

IDENTIFICATION

FREEZER

COMPARTMENT

Freezer

Shelf

General

Type

lceTray

Freezer

Temperature

ControlDaal

lceCube

Box

REFRIGERATOR

COMPARTMENT

Temperature

ControlDial

RefrigeratorLamp

Shelves

SnackGorner

Crisper

Usedtokeep

fruits

and

vegetables

fresh

andcrisp.

FreezerDoorRack

Door Coollng

Ontherelrigerator

door,

thecoldairpassageway

installed

tosupply

coldairtothedoorsideof

the refrigerator

compartment.

CanServer

DalryCorner

WlneRack

Adlustable

DoorBin

RelrlgeratorDoor

Rack

Levellng Screw

(lnslde)

Base

Grllle

-5-

DISASSEMBLY

3-1DOOR

o Freezer

Door

Remove

the

hingecover

pulling

itupwards.

2.Loosenhexagonal

boltsfixing

theupper

hinge

tothe

body

andlilt

thefreezer

door.

3.Pull

oul

thedobr

gasket

loremove

from

the

doorfoam

Ass'y.

GASKET

Flgure

o Refrlgerator

Door'

'. ' : :

1.Loosen

hexagonal

boltslixing

thelower

hinge

the

bodytoremove

therefrigerator

dooronly.

LOWER

HINGE

Flgure

2.Pullout

thedoor

gasket

toremovefrom

thedoor

foam

Ass'y.

3-2DOOR

SWTTCH

Toremove

thedoor

switch,

pull

outitwith

a ,-,type

driver

asshown

in(ligure 9).

2. Disconnect

thelead

wire

from

theswitch.

3.3THERMOSTAT

1.Remore

Control

Box-R

loosening

2screw

fircd

toceiling i ,

ofRefrigerator

compartment(Figure

10) {J'

2.Separate

the

thermostat

and

dial

knob

3.Remove

the

thermostat

disconnecting

theleadwire.

Li,

4t'

.tf,

HINGE

COVER

BOLT

HINGE

. Flgure

e@Flgure

B.q FAN

AND

FAN

MOTOR

lFi. Fiemove

Inelreezer

sner'

r.-,

'A 2.Remove

the

Grille

bypulling

itout

and

loosening

screw.

3.Remove

lhe

Fan

Motor

Assy

loosening

4screws

and

disassemble

theshroud.

4.Pullout

the

tanand,

separate

the

Fan

Motor,

Bracket'

FANMOTOR

SHROUD

'JIBRACKET

Flgure

3.5

DEF'CONTROL

ASSY

efcontrol

Assy

consists

olDefrost

Thermostat

and

FUSE-M.

efrost

Thermostat

functions

todefrost

automatically

and

isattached

tometal

side

olthe

Evaporator

and

senses

Temp.

Fuse-M

isa kindof

safety

device

for

preventing

over'

heating

oftheHeater

when

defrosting.

Atth€

temperature

of77"C,il

stops

theemission

olheat

from

theHeater.

'1.

Pullout

the

Grille

Ass'Y.

2.Separate

the

connector

connected

withthe

Def

Control

Assyand

replace

theDefControl

Assy

atter

cutling

the

Tie

Wrap.

(Figure13)

3-6

REFRIGERATOR

LAMP

REFRIGERATOR

ROOM

LAMP

Flgure

1.Unplug

the

power

cord

fromthe

outlet.

2.Remove

relrigerator

shelves.

3.Upper

Refrigerator

LamP.

Release

the

hookson

both

ends

olthelampshield

and

pullthe

shield

downward

toremow

it.

4.Turnthelampcounterclochrise.

5.Assemble

inreverse

order

ofdisassembly.

Replacemenl

bulb

mustbethe

same

speclfication

asoriginal.

(Max

40W)

3.7 CONTROLBOX.B

1.First,

removeall

shelves

inthe

relrigerator

and

Control

Box-R

loosening

2screw

Flguru

2.Remove

theControl

Box'R

pulling

itdownward.

3.Disconnect

theUwire

the

right

position

and

seperate

timer,

themoslat,

LamP

socket,

stc.

SHROUD.F

Flgurc

DEF.THEFMO

HOLDER

FUSE Flgure 13

-7-

4.ADJUSTMENT

4-1COMPRESSOR

4-1-1

Role

Thecompressor

intakes

lowtemperatureand

low

pressure

gas

evaporaled

from

Evaporatorofthe

Refrigerator,and

condenses

this

gas

tohighlemperatureand

high

pressure

gas,

and

then

plays

delivering

roletoCondenser.

4-1-2Composition

TheCompressor

isComposed

olCompressor

Apparaius

compressing

gas,

Compressor

MotormovingCompressor

Apparatusand

Case

protecting

Compressor

Apparatus

and

Motor.

Thereare

PTC-Starter,

andOverLoad

Protector

(OLP)

intheCompressor

outside.On

theother

hand,

because

theCompressor

consistsof

1/1000mm

processing

precision

components

andissealedatler

production

inabsence

dust

orhumidily;

deal

andrepair

with

care.

4-1-3

NoteforUsage

(1)

Becareful

nottoallowover-Voltage

and

over'current.

(2)

Strike

lfapplying

fbrcible

power

orstrike

(dropping

orcareless

dealing),

poor

operation

and

noisemayoccur.

(3)

Use

proper

electric

components

appropriate

tolhe

Comprassor.

(4)

Nole

loKeepCompressor.

lfCompressor

gets

wetinthe

rainand

rustin

the

Hermetic

Terminal,

the

resultmaybe

poor

operation

and

poor

contact

maycause. t:',

(5)

carelulthat

dust,

humidity,andllux

weldingdon'l

inflow

intheCompressor

insideinreplacing

the

Compressor.

Dust,

humidi$,and

fluxdue

towelding

which

inflowsto

Cylinder

maycause

lockage

andnoise.

4.2 PTC.STARTER

4-2-1Composltlon

ofPTC-Starter

(1)

PTC

(Positive

TemperatureCoetficient)

ano-contact

semiconduclor

starting

devioe

which

uses

ceramic

materialand

this

materialconsists

ofBaTiOs.

(2)

The

higherthetemferature

is,the

highgrbecomes

the

resistance

value.These

leaturesareused

asstarting

device

for

theMotor.

4-2-2

Roleot PTG-Starter

(1)

PTC

attached

toHermeticCompressor

used

for

Refrigerator,

Show

Caseandstarls

Motor.

(2)

Compressor

for

household

refrigerator

appliesto

single-phase

induction

Motor.

For

normaloperation

thesingle'phase

induction

motor,

inthe

starting

operation

flows

inboth

maincoil

and

sub-coil.

After

thestarting

isover,

thecurrent

subcoil

isculoff.

The

proper

features

ofPTC

play

all

the

above

roles.So,

PTC

isusedasamolorstarting

device.

4-2-3PTC'Applied

CircuilDiagram

oAccording

toStarting

MethodforlheMotor

4-2.4MotorRestarting

andPTCCoollng

(1)

Forrestartingafter

power

off

duringnormal

Compressor

Motoroperalion,

plug

thepower

cord

afler

5min.for

pressure

balance

olRefrigeratingCycle

and

PTC

cooling.

(2)

During

normaloperation

the

CompressorMotor,

PTC

elemenls

generate

heatcontinuously.

Therefora,

ifPTCisn'tcooled

forawhile

afterthe

power

has

been

shut

otf,

Motorcan'toperateagain.

4-2-5

RelatlonofPTG-Starter

andOLP

tO,

(1)

Itthe

power

isoff

duringoperationofGompressor

and

the

power

isonbeforeitrepfC iscooled,

(instant

shut- O ,

otf

within

2min.orreconneclapowor

plug

duelo

misconnecting),thePTCisntcooledandaresistance

value

grows.

Asa result,

current

can'tflowtothe

sub-

coil

andtheMotor

can'toperaleandtheOLPoperates

flowingovercurrentinonly

inthemain-coil.

(2)

While

the

OLPrepeats

onandoffoperation

about3-5

times,

PTC

iscooledandGompressor

Motor

performs

normal

operation.

tfOLPdoesn't

operale

whenPTCisnotcooled,

Compressor

Motor

iswornawayandcausescircuit'

shortand

fire.Therefore,

useaproperly

fixed

OLP

withoulfail.

4-2{ Noteto Use

PTC-Starter

(1)

Becareful

notto

allowover-voltageandoJer-curront.

(2)

Strike

Don'tapply

alorcible

power

orstrike.

(3)

Keepaparlfrom

any

liquid.

lfliquid

such.as

oilorwaterawayenter

thePTC,

PTC

materialsitmaybreak

duetoinsulationbreakdown

olthe

materialitself.

(4)

Don'tchange

PTCatyour

conv.enience.

Don't

disassemble

PTCandmold.

lftheexterior

tothe

PTO-starter

isdamaged,

resistance

valueisaltered

and

itmay

cause

poor

startingofthe

compressor

motor

may

cause.

(5)

Use

aproperly

fixed

PTC.

COMPRESSOR

MOTOR

rl-

rCD"

pTC

STARTER HEBMETIC

RSIR TERMINAL

Flgure

-8-

.-,

E4-g oLP

(ovERLoAD

PROTECTOR)

-'- 4-3-1Definitionol OLP

t (1)

OLp

(OVERLoAD

pRoTEcTOR)

atrached

rorhe

Compressor

and

protects

theMotor

bycuttingthe

currenltotheMotorilthetemperature

rises

and

activatesthebimetal

springin

theOLP.

(2)

When

over-vollage

flows

toCompressor

motor,

the

Bimelalworksbyheating

theheaterinside

the

OLB

andtheOLP

protects

Motor

bycutting

offcurrenl

which

flows

totheCompressorMotor.

4-3-2RoleoftheOLP

(1)

The

OLP

attachedlotheHermetic

Compressor

used

for

theRefrigeralor

and

ShowCase

and

prevents

the

Motor

Coillrombeing

startedin

the

Compressor.

(2)

notturntheAdjust

Screw

ofthe

OLPinanyway

for

normal

operationofthe

OLP.

(Composition

andconnection

Diagram

ofOLP)

5.CIRCUITDIAGRAM

CONTACTING

POINT

AOJUST

SCREW

BIMETAL

CONTACTING

POINT

HEATER

TERMINALS

BIMETAL

,^.

/.d'\

'T F,' I F I

I laa I t

I t_:',-. ,

\{ /

TER Flgure17

CIRCUIT

DIAGRAM/SCHEMA

DEMONTAGE

WATEE

$PPTYIIGIUE

onnil

doCorrna$r

drllililta

) CAlIIbt{:Plc|lc

uulrohc urod

filnh.uCq||n. -

AVEFIISSEIISIT

:Ver|u d6trudortr

ordon

deneddo & hprb.ril*.

$||f0l l0ill*odllrnilu rfue

Tgnpa

swt strz swtt

OFF

Ffina OFF'

Fmr{ OFF

F.rrr* 10.5loc

ot{

Atma OFF

Fanna EF

rrn6 9soc

)FF

rrrrr6 ON

Altrna OFF

ffi 10

soc

of{

Athd

OFF

ffi

ot{

Aluma OFF

Ffira 11soc

OFF

FfinA cil

AIur{ 12

s6c

gtl

Alrin{ OFF

Firrr$ oil

llrna 13

soc

OFF

Fern6 ..rtt

Ahrr{ 9?{'

Afna 14

sec

ol{

Aluma ofl

Altrrrd ot{

Alun* 15

coc

slfict{0N

tmfrr|l|na

sv{fTct{oFF

hm*rtunl swr,

suv2

sfTS

r |rIPf PA8T.

CAPACITORS,IH€ PLIJOWPE,EANTHPAFTAIIOEE I|IXER OFNONPAFI OI{c|NqXr

DUOR^TARE

SUAECTTOC|{^NOE

l{ D|FFEREI{T

IOCAUIES.

r PAFTI€

UI,PE.F. @N!EN8AIEI,RS, WPEO€PNI8E.

PAFITE

D€TERaEETPARIE EN

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G|-AC|€RE8URLE

CHEMA

D€UO|{IAOE 80i|T SU,E'3 ACrur{oEn oa6 lr8 toc^Ux DtFFfn6fl8.

urffrr

rEr rGBoPrroilPAnr

Pttrt$iOOdan

o,ffilgg ii

i-1

Eilt,

il'

r-'

ir EI

FI'

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effi

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ttH:lYHfIEBL:8[tE RD:Rm PK:PSfi j Un:ernc B[:Bar RD:Rurg| pt(:Ror

Bl(:Bl-l0l(

il{:88OIl{ PR;PufiPtE

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