Sears GR-151SPF, GR-131SPF, GR-151SF Servicing Precautions

SAFETY PRECAUTIONS

1. Check if an electric leakage occurs in the set.

2. When servicing current applying parts, unplug prior to
servicing.

3. In case of testing with power injecting, wear rubber
gloves to prevent electric shock.

4. If you use any appliances, check regular current, voltage
and capacity.

5. Don't touch metal products in cold freezer room with wet
hand. It may cause frostbite.

6. Prevent water flowing to electric elements in mechanical
parts.

7. When sloping the set, remove any materials on the set,
especially thin plate type(ex,: glass plates or books.).

8. When servicing evaporator part, wear cotton gloves
without fail. It is to prevent wound by sharp fin of
evaporator.

9. Leave a breakage freezing cycle to a heavy service
center. The gas in cycle inside may soil ambient air.

SERVICING PRECAUTIONS

AIR RECHARGING IN COMPRESSOR

Test the refrigeration system by connecting it electrically
before refilling operation. This is necessary to ascertain the
function of the motor-compressor and identify the defects
immediately. If the defects have been found, empty the old
system of eventual R-12 residue by breaking off the end of
the extension piece at its narrow point. (Figure 1)

Replace the filter and any damaged components. Unsolder
and pull off the piece remaining inside the service tube and
then attach an extension completely with male Hansen and
last, solder it to the same tube again. (Figure 2)

It is necessary to execute the soldering operation with
valve open so that the fumes caused by oil residue can
come out freely without blowholes between two tubes
during heating the point to be soldered.
The extension fitted with the male Hansen is connected to
the female fitting of the vacuum pump tube. (Figure 3)
Air evacuating from the system begins as soon as the

pump starts. The refrigeration system must be kept under
vacuum until the reading on the low-pressure gauge

indicates vacuum (0 absolute, -1 atm., -760 mm Hg) in any
case it is advisable to keep the pump running for about

30 minutes. (Figure 4)

POINT TO BE

BROKEN

SERVICE TUBE

EXTENSION

Figure 1

CHARGE TUBE FEMALE

EXTENSION HANSEN

MALE

HANSEN

SOLDERING

POINT

Figure 2

PRESSURE

GAUGE

Figure 3 Figure 4

-3-

In case that a considerable leakage occurs and to stop the
vacuum pump will be necessary and add a small quantity
of Freon to the system, if vacuum should not be obtained
(pressure gauge can't fall to 1 atmosphere.), start the
refrigeration unit and find the leakage with the special
leak-finder. When the defective soldering point is visible,
re-do it after opening the extension tube valve and
reestablishing the normal outside pressure inside the
group.
Because the melted alloy is sucked into the tubes and
block them, the pressure must be rebalanced when
vacuum is in the system in soldering. As soon as the
vacuum operation is over, add the quantity in grams of R-

12 to the refrigeration system. Remember that every
system has an exact quantity of R-12 with a tolerance of
+5 grams than can be added. (Figure 5)

TO THE
R-12 CYLINDER

__ TO THE

= REFRIGERATION

SYSTEM

Figure 5

Before performing this operation (if the vacuum pump and
refilling cylinder are connected), make sure that the valve
placed between the vacuum pump and refilling tube are

closed to keep the Freon for adding to the system. (Figure 6)

FILLING OR VALVE TO BE

_ CHARGE TUBE OPENED WHEN

REFILLING

TO THE TO THE

REFRIGERATION CHARGE

SYSTEM CYLINDER

TO THE VALVE TO BE

VACUUM CLOSED

PUMP AFTER VACUUM

Figure 6

In addition, check the graduated scale on the cylinder for

the quantity of R-12 to be added, for example, if we have

750 grams of Freon in the cylinder and must add 165

grams to the group, this amount will be reached when R-12

has dropped to 585 grams, remembering that the indicator
shows a lower limit of meniscus. Do this after choosing the
scale corresponding to the gas pressure different scales

reported as the same gas pressure indicated by the

pressure gauge on the top of the column.
To make R-12 flow into the system, open the valve placed
at the base of the cylinder and connected to the filling tube.
The amount of Freon cannot be added to the system all at
once because it may cause a blocking of motor-compresson

Therefore, proceed by adding original quantity of about
20-30 grams and close the valve immediately.
The pressure rises and the motor-compressor must start,
sucking the gas and making the pressure go down again.

Regulate the valve again, maintaining the same manner

until reaching the quantity of R-12 established for the
system being charged. When the system is running, the
suction pressure must be stabilized from 0.30 to 0.6
atmosphere.

-4-

AIR RECHARGING IN COMPRESSOR

Test the refrigeration system by connecting it electrically
before refilling operation. This is necessary to ascertain the
function of the motor-compressor and identify the defects
immediately. If the defects have been found, empty the old
system of eventual R134a residue by breaking off the end
of the extension piece at its narrow point. (Figure 1)
Replace the filter and any damaged components. Unsolder
and pull off the piece remaining inside the service tube and
then attach an extension completely with male Hansen and
last, solder it to the same tube again. (Figure 2)

It is necessary to execute the soldering operation with
valve open so that the fumes caused by oil residue can
come out freely without blowholes between two tubes
during heating the point to be soldered.
The extension fitted with the male Hansen is connected to
the female fitting of the vacuum pump tube. (Figure 3)

Air evacuating from the system begins as soon as the

pump starts. The refrigeration system must be kept under
vacuum until the reading on the low-pressure gauge

indicates vacuum (0 absolute, -1 atm., -760 mm Hg) in any
case it is advisable to keep the pump running for about
60 minutes. (Figure 4)

POINT TO BE

BROKEN

SERVICE TUBE

EXTENSION

Figure 1

CHARGE TUBE FEMALE

EXTENSION HANSEN

MALE

HANSEN

SOLDERING

POINT

Figure 2

MP

PRESSURE

GAUGE

Figure 3 Figure 4

-5-

In case that a considerable leakage occurs and to stop the
vacuum pump will be necessary and add a small quantity
of Freon to the system, if vacuum should not be obtained
(pressure gauge can't fall to 1 atmosphere.), start the
refrigeration unit and find the leakage with the special
leak*finder. When the defective soldering point is visible,
re*do it after opening the extension tube valve and
reestablishing the normal outside pressure inside the
group.
Because the melted alloy is sucked into the tubes and
block them, the pressure must be rebalanced when
vacuum is in the system in soldering. As soon as the
vacuum operation is over, add the quantity in grams of
R134a to the refrigeration system. Remember that every
system has an exact quantity of R134a with a tolerance of
+5 grams than can be added. (Figure 5)

TO THE
R134a CYLINDER

TO THE

REFRIGERATION

SYSTEM

Figure 5

Before performing this operation (if the vacuum pump and
refilling cylinder are connected), make sure that the valve
placed between the vacuum pump and refilling tube are
closed to keep the Freon for adding to the system. (Figure 6)

FILLING OR VALVE TO BE

_ CHARGE TUBE OPENED WHEN

REFILLING

TO THE TO THE
REFRIGERATION CHARGE
SYSTEM CYLINDER

TO THE VALVE TO BE

VACUUM CLOSED

PUMP AFTER VACUUM

Figure 6

In addition, check the graduated scale on the cylinder for
the quantity of R134a to be added, for example, if we have
750 grams of Freon in the cylinder and must add 165
grams to the group, this amount will be reached when

R134a has dropped to 585 grams, remembering that the

indicator shows a lower limit of meniscus. Do this after
choosing the scale corresponding to the gas pressure
different scales reported as the same gas pressure

indicated by the pressure gauge on the top of the column.
To make R134a flow into the system, open the valve

placed at the base of the cylinder and connected to the
filling tube. The amount of Freon cannot be added to the
system all at once because it may cause a blocking of
motor*compressor. Therefore, proceed by adding original
quantity of about 20-30 grams and close the valve

immediately.
The pressure rises and the motor*compressor must start,
sucking the gas and making the pressure go down again.

Regulate the valve again, maintaining the same manner
until reaching the quantity of R134a established for the
system being charged. When the system is running, the
suction pressure must be stabilized from 0.10 to 0.4
atmosphere.

-6-

SPECIFICATIONS

ITEMS SPECIFICATIONS

DOOR TYPE 1 DOOR

NET CAPACITY 94 l

CONDENSER TYPE WALL CONDENSER

(FLUSH BACK)

DEFROSTING SYSTEM MANUAL

TEMPERATURE CONTROL KNOB DIAL

ITEMS

INSULATION DO_OR

_ CABINET

EVAPORATOR

DIMENSION

NET WEIGHT

REFRIGERANT

VS Series

COMPRESSOR

LUBRICANT

NS Series
COMPRESSOR

SPECIFICATIONS

POLYURETHANE
POLYURETHANE

ROLL BOND TYPE

463(W)X830(H)X500(D)mm

22 Kg

R-12(67g) R-134a(60g)

HTS-150 FREOL a 22G
(200cc) (200cc)
HTS-150 FREOL a 22G
(180cc) (180cc)

PARTS IDENTIFICATION

EVAPORATOR(DoorInside)

- The heartof the refrigerator.

- It evaporates therefrigerant
fluid andthereby absorbs

heatfrom the surrounding.

ICE CUBETRAY(DoorInside)

Ice cube is easy to remove

from the tray

DRIP TRAY
Catches the water that
drips off the evaporator
when defrosting.

PLASTIC COATED
SHELVES
Have full width and can
slide out.

PVC BAR

Keeps any kinds of fruits

and vegetables.

THERMOSTAT

Regulates the operation of
the motor and controls the

temperature inside the
refrigerator.

SUPPORTER CAN
Keeps any kinds of bottles.

MAGNETIC GASKET

- Tight fitting door seal
keeps all the cooling
power locked inside,

- No hooks or latches.

NOTE : This is a basic model. The shape of refrigerator is subject to change.

-7-

DISASSEMBLY

A. DOOR

1. Loosen 3 screws holding an upper hinge to separate the
door body. (Figure 7)

Figure 7

B. THERMOSTAT

1. Pull Knob Dial,

2. Loosen 1 screw holding the case and pull it out to
remove the Therme cover. (Figure 8)

Figure 8

C. COMPRESSOR AND PTC

1. Remove Clamp, Protector Cover, Power Cord and Lead
Wire first. (Figure 10)

2. Separate OLR

3. Separate PTC.

4. Remove the Compressor Base by loosening 4 bolts fixed
to base plate of the set. (Figure 11)

Figure 10

-%

Figure 11

5. Remove the Compressor by loosening 2 earth screws
next to Compressor.

NOTE : Replace the Compressor, after peeling off

painted part of earth terminal.

• Compressor inhales the gas evaporated from Evaporator

and condenses this gas and then delivers to Condenser.

• PTC is abbreviation of Positive Temperature Coefficient

and is attatched to the Compressor, and operates motor.

• OLP prevents Motor coil from being started inside

Compressor.

• Do not turn the Adjust Screw of OLP in any way for

normal operation of OLR

3. Pull out thermostat in the theremostat cover, and
disconnect lead wires. (Figure 9)

NOTE : Replace a new thermostat with proper specification.

@

Figure 9

-8-

CIRCUIT DIAGRAM

4

THERMOS'[A'T

YL _ BK

GN{GN_L)t <_ BK

s_

it"__FL_REs_oR

P.T.C STARTER

YL: YELLOW
BK: BLACK
BL: BLUE

GN:GREEN

THE PLUG TYPE ON CIRCUIT DIAGRAM IS SUBJECT
TO CHANGE IN DIFFERENT LOCALITIES. J652-00041C

TROUBLESHOOTING

DEFECT EFFECT CAUSE REMEDY

GROUP PARTIALLY
OR COMPLETELY
OUT OF
REFRIGERANT
CHARGE

EXCESSIVELY
FULL

HUMIDITY IN THE

SYSTEM

PRESENCE OF AIR
IN THE SYSTEM

BLOCKED
CAPILLARY

MOTOR-
COMPRESSOR

SHORT-CIRCUITED

OR BLOCKED

MOTOR-
COMPRESSOR
DOSE NOT
COMPRESS

NOISY MOTOR-
COMPRESSOR

Evaporatordose notfrosteven
thoughmotoFcompressorruns
continually.

This defect is indicatedby the

presenced water outside

refrigeratornearthemotor caused

byformationsof ice onthe return
tube.

This defect is indicatedby thepartial
frosting of the evaporatorandby
continualdefrostingcycles
determinedbythe interruptionof the
flow of gas onthe evaporator.The

motorcompressorkeepsrunning.

Poorperformanceofthe refrigerant
systemwhich is indicated:onthe
evaporatorwitha slightfrostwhich

dosenot freezeandanexcessive
overheatingof thecondenserand

motor-compressor.

Becauseof thelackof circulation

Freonin the system,there is no
frosting of the evaporator,whilea
slightoverheatingofthe first spiralof

the condenseris noted.

The systemdose notworkandthe
"clixson" intervenesinterrupting
deliverytothe motorraompressor.

Nofrostformsonthe evaporator
evenifthe motor-compressoris
apparentlyrunning regulary.

Incaseof mechanicalfailureinthe

motor-compressorthere in an
excessivenoisewhenthe systemis
functioning:incasea suspension
spring isunhooked,bangingwill be

heardand therewill be especially
strong vibrationswhen the system
startsup andstops,

An emptyrefrigerantsystem

indicatesa leakageof R134a This

lossis generallyto belookedfor at
the soldering pointsconnectingthe
variouscomponentsor in an
eventualholeintheevaporator

madebythe user.

Ifin therefrigerantsystema quantity
of R134aisintroducedwhichis

greaterthan that indicated,the
excessgas dosenot terminateits
expansionin the evaporatorbut

proceedsintothe returntube.

The refrigerantsystemis humid
when there isasmall percentageof
waterpresentwhich,notcompletely

retainedbythe dehydratorfilter,
enters into circulationwiththe Freon

andfreezes atthe capillaryexitin
the evaporator.

There isair in arefrigeratingsystem
when duringthe fillingphase

vacuum isnoteffectedorit is not
adequatelydone.

Eventualimpuritiescontainedin the

Freonor inthe componentsofthe

refrigerationsystembefore
assemblyandnot retainedbythe
filter can obstruct thecapillary.

Incaseof shortcircuit,the

breakdownis dueto the electric
winding:if blocked,thereis a

mechanicalfailureinthe motor-
compressoE

Inthiscasethere isa mechanical
failurein the diaphramvalveswhich:

remainingcontinuallyopen, do not

permitthepistonto suckand
compressorthe which
consequenteIydosenot circulatein
the system.

The causeof the excessivenoise is

normailytobe soughtfor ina

mechanicalbreakdown,andonly

rarelyinthe unhookingofone of the
suspensionsprings.

Leakagemust beeliminatedby
resolderingthe defectivepointor
substitutingthedamaged
evaporator.

Thesystemmustbe emptiedand
subsequentlyrefilledintroducingthe
correctquantityof R134a.

Thesystemmustbe emptiedand
thenrefilledafter eliminatingthe
humidity.

Groupmustbedrainedand
subsequentlyrefilledaftercarefully
creatingvacuum.

Torestore the systemitmust be
emptied,substitutethe capillaryor
the evaporatorentirelyin casethe
capillaryis coaxialwith respectto
the return tube, then refillit.

Themotor-compressormustbe
replacedand thenproceedwith
refilling.

Themotor-comprossormustbe
replacedand thenproceedwith
refilling.

Themotor-comprossormustbe
substitutedand thenproceedwith
the refilling.

-10-

NO COOLING

The Compressor
doesn't run,

Check if the current
flows at the contacting

Poor contacting point

Replace the

Thermostat.

Check if the current flows
at the contacting point of
the starting system.

Poor contacting point

and broken

Replace the device.

Check if the current

flowing of the sub coil of _ "

-11-

COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS

Separate the PTC-STARTER from
the Compressor and measure the
voltage between M and C of the
Compressor.

Equal to the applied _ r_

voltage. (Rating _ 2>
voltage + 10%) I

Check the L
resistance of the
Compressor Motor.

YES

YES

NO

NO

YES

OLP works within 30 sec.
in forcible OLP operation

by turning instant power on _ NO _

Replace OLR

Measure minimum starting voltage
after checking steps 1-3 above.
And measure the pressure balance
of the PTC with the interval of
more than 5 min.

-12-

PTC

Poor starting or no
operating of the
Compressor.

4D

First, separate the PTC from
the Compressor and check the
voltage between NO 5 and 6

in the PTC with a muititester or
Wheatstone Bridge.

F

Normal _ Check another

electric
components.

__ Abnormal _ Replace the

PTC.

_{_ Abnormal _ Replace the

PTC.

4m

Separate the OLP from
the Compressor and
check resistance value

between two terminals of
OLP with Tester.

-13-

EXPLODED VIEW

-14-

-15-

HOME DEPOT(HDP) Electrical Specification

ITEM GR-051SF GR-131SF GR=151SF

BUYER MODEL NAME GR_051SF GR_131SPF GR-151SPF

RATED INPUT(W) 70+15% 70+15% 70+15%

DEFROST INPUT(W)

ENERGY CONSUMPTION(kwh/yr) 288 330 350

AMPERE(Amp) 0.84 1.0 0.7

RATING(V/Hz) 115/60 115/60 115/60
REFRIGERANT R134a R134a R134a

CHARGE(Oz) 1.41 2.12 3.35
COMPRESSOR NS24LBCM NS24LBCG NS30LACM

OLP 4TM232NFB 4TM232NFB 4TM265MFB

PTC P6R8MD P6R8MC P6R8MD

CAPACITOR-R 101JF/250VAC 101JF/250VAC
CAPACITOR-S