Kenmore 4666812 User manual

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
PR
ECAUTIONS
............... ..........2
SERVtCTNGPRECAUT|ONS................
..8
CoMPRESSORANDELECTRTC
COMPONENTS............... ........
10
@i
*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
in
themechanical
parts.
7.Closethe
top
doorbeforeopeningthe
bottom
door.
Otherwise,
you
mighthit
your
head
when
you
standup.
8.When tiltingtherefrigerator,removeanymaterials
on
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
of
possiue
R-l34aresidue
bybreaking
off
theend
of
lhe
exlenslon
piece
atitsnarrow
point.
(Figure
1)
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
2)
ll lsnecessary
lo €xecute
the
soldering
operation
with
valve
open
solhalthefumes
caused
by
oilresidue
can
como
oulfreelywilhoul
blowholes
between
twotubes
durlngtheheating
theoflhe point
tobesoldered.
Theextensionlitted
withthemaleHansen
isconnected
to
lhc female
littingofthevacuumpump
tube.
(Figure
3)
Airevacuating
from
thesysiem
begins
assoonas
lhe
pump
starls.Therefrigeration
systemmust
bekept
under
vacuum
untillhereading
onthe
low-pressuregauge
indicales
vacuum
(0
absolute,
-1
atm.,
.760
mmhg)
in
any
caseitisadvisable
tokeep
the
pump
running
for
about
30
minutes.
(Figure
3)
Incase
thataconsiderableleakage
occurs
itwill
be
necessary
tostopthevacuum
pump
andtoadd
asmall
quantity
ofFreon tothesystem,.if
vacuum
shouldnot
be
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
of
R-134a
totherefrigeration
system.
RemehOei
that
every
system
has
an
exact
quantity
ofR-134a
with
atolerance
of
t5 grams
that
canbeadded.
(Figure
4)
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
5)
In
addition,
check
the
graduated
scale
on
thecylinderlor
the
quantity
olR-13a tobeadded,
for
example,ifwe
have
750
grams
olFreon
in
the
cylinder
andmust
add140
grams
tothe
group,
lhis
amount
willbereached
when
R-134a
hasdropped
to610
grams,
remembering
that
the
indicator
shows
alower
limit
ofmeniscus.
Do
this
after
choosing
the
scale
corresponding
tothe
gaspressure
different
scales
reported
asthesame
gas
pressure
indicated
by
the
pressure
gauge
on
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
by
adding
theoriginal
quantity
ofabout
20-30
grrams
and
close
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
be
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
I
v
FILLING
OR VALVE
TO
BE
OPENEO
CHABGE
TUBE WHEN
REFILLING
TOTHE
CHABGE
CYLINDER
VALVE
TOBECLOSED
AFTER
VACUUM
Flgure
5
-3-

1.
SPECIFICATIONS
Ref.
No.:
46
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
g)
LUBRICATING
OIL Freol
@l5G
(310cc)
DEFROSTING
DEVICE SHEATH
HEATER
LAMP I REFRIGERATOR
40w
-4-

2.PARTS
IDENTIFICATION
B
C
=l
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
is
installed
tosupply
coldairtothedoorsideof
the refrigerator
compartment.
CanServer
DalryCorner
WlneRack
Adlustable
DoorBin
RelrlgeratorDoor
Rack
Levellng Screw
(lnslde)
Base
Grllle
-5-
's

3.
DISASSEMBLY
3-1DOOR
o Freezer
Door
1.
Remove
the
hingecover
by
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
7
o Refrlgerator
Door'
'. ' : :
1.Loosen
hexagonal
boltslixing
thelower
hinge
to
the
bodytoremove
therefrigerator
dooronly.
LOWER
HINGE
Flgure
8
2.Pullout
thedoor
gasket
toremovefrom
thedoor
foam
Ass'y.
3-2DOOR
SWTTCH
1.
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
by
loosening
2screw
fircd
toceiling i ,
ofRefrigerator
compartment(Figure
10) {J'
2.Separate
the
thermostat
and
dial
knob
F.
3.Remove
the
thermostat
by
disconnecting
theleadwire.
Li,
Oi
4t'
vi
.tf,
HINGE
COVER
BOLT
HINGE
. Flgure
6
0\
e@Flgure
10
6-

B.q FAN
AND
FAN
MOTOR
E
lFi. Fiemove
Inelreezer
sner'
r.-,
'A 2.Remove
the
Grille
bypulling
itout
and
by
loosening
a
screw.
3.Remove
lhe
Fan
Motor
Assy
by
loosening
4screws
and
disassemble
theshroud.
4.Pullout
the
tanand,
separate
the
Fan
Motor,
Bracket'
FANMOTOR
SHROUD
'JIBRACKET
Flgure
11
3.5
DEF'CONTROL
ASSY
efcontrol
Assy
consists
olDefrost
Thermostat
and
FUSE-M.
efrost
Thermostat
functions
todefrost
automatically
and
it
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
14
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
by
loosening
2screw
Flguru
15
2.Remove
theControl
Box'R
by
pulling
itdownward.
3.Disconnect
theUwire
on
the
right
position
and
seperate
timer,
themoslat,
LamP
socket,
stc.
SHROUD.F
Flgurc
12
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
of
dust
orhumidily;
deal
andrepair
with
care.
4-1-3
NoteforUsage
(1)
Becareful
nottoallowover-Voltage
and
over'current.
(2)
No
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
pin
of
Hermetic
Terminal,
the
resultmaybe
poor
operation
and
poor
contact
maycause. t:',
(5)
Be
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)
is
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
is
attached
toHermeticCompressor
used
for
Refrigerator,
Show
Caseandstarls
Motor.
(2)
Compressor
for
household
refrigerator
appliesto
single-phase
induction
Motor.
For
normaloperation
of
thesingle'phase
induction
motor,
inthe
starting
operation
flows
inboth
maincoil
and
sub-coil.
After
thestarting
isover,
thecurrent
in
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
of
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,
fi
t
(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
by
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)
No
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.
er
COMPRESSOR
MOTOR
rl-
rCD"
Y]
pTC
STARTER HEBMETIC
RSIR TERMINAL
Flgure
16
-8-

.-,
E4-g oLP
(ovERLoAD
PROTECTOR)
-'- 4-3-1Definitionol OLP
t (1)
OLp
(OVERLoAD
pRoTEcTOR)
is
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
is
attachedlotheHermetic
Compressor
used
for
theRefrigeralor and
ShowCase
and
prevents
the
Motor
Coillrombeing
startedin
the
Compressor.
(2)
Do
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_:',-. ,
\{ /
\z
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
oPTrn O€
G|-AC|€RE8URLE CHEMA
D€UO|{IAOE 80i|T SU,E'3 ACrur{oEn oa6 lr8 toc^Ux DtFFfn6fl8.
t-
urffrr
rEr rGBoPrroilPAnr
Pttrt$iOOdan
o,ffilgg ii
i-1
c{
Eilt,
t'
T
FO
il'
r-'
ir EI
FI'
Eiit
EI'
effi
,{i'..
ttH:lYHfIEBL:8[tE RD:Rm PK:PSfi j Un:ernc B[:Bar RD:Rurg| pt(:Ror
Bl(:Bl-l0l(
il{:88OIl{ PR;PufiPtE
YL:YE[lOVtiB(:tldr Bil:Bnn PR:FqrpnytlJruc
8O:BR|GHT0R|I€EGY:GMY GN:GREE}|
iaO:On4cO* Gy:Grb Gil:Vrl
.-t
-9-