Sears GR-051SF, GR-131SF User Manual

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.
SERVICING PRECAUTIONS
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.
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)
POINT TO BE
BROKEN
SERVICE TUBE
EXTENSION
CHARGE TUBE FEMALE
EXTENSION HANSEN
MALE
HANSEN
SOLDERING
POINT
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)
PRESSURE
GAUGE
Figure 1
Figure 2
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)
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
TO THE TO THE
REFRIGERATION CHARGE
SYSTEM CYLINDER
TO THE VALVE TO BE
VACUUM CLOSED
PUMP AFTER VACUUM
Figure 6
REFILLING
TO THE R-12 CYLINDER
__ TO THE
= REFRIGERATION
SYSTEM
Figure 5
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)
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
TO THE TO THE REFRIGERATION CHARGE SYSTEM CYLINDER
TO THE VALVE TO BE
VACUUM CLOSED
PUMP AFTER VACUUM
Figure 6
REFILLING
TO THE R134a CYLINDER
Figure 5
TO THE
REFRIGERATION
SYSTEM
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
PARTS IDENTIFICATION
EVAPORATOR(DoorInside)
- The heartof the refrigerator.
- It evaporates the refrigerant fluid and thereby absorbs
heatfrom the surrounding.
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)
THERMOSTAT
Regulates the operation of the motor and controls the
temperature inside the refrigerator.
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.
NOTE : This is a basic model. The shape of refrigerator is subject to change.
SUPPORTER CAN Keeps any kinds of bottles.
MAGNETIC GASKET
- Tight fitting door seal keeps all the cooling power locked inside,
- No hooks or latches.
-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)
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
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
Figure 11
Figure 8
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
THERMOS'[A'T
4
YL _ BK
GN{GN_L)t <_ BK
s_
YL: YELLOW BK: BLACK BL: BLUE
GN:GREEN
it"__FL_REs_oR
P.T.C STARTER
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
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.
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.
Leakagemust beeliminatedby resolderingthe defectivepointor
substitutingthedamaged evaporator.
Thesystemmustbe emptiedand subsequentlyrefilledintroducingthe correctquantityof R134a.
Thesystemmustbe emptiedand thenrefilledafter eliminatingthe
humidity.
Groupmustbedrainedand subsequentlyrefilledaftercarefully creatingvacuum.
BLOCKED CAPILLARY
MOTOR- COMPRESSOR
SHORT-CIRCUITED
OR BLOCKED
MOTOR- COMPRESSOR DOSE NOT COMPRESS
NOISY 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,
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.
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.
Check if the current
flowing of the sub coil of _ "
Poor contacting point
and broken
Replace the device.
-11-
COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS
Check the L resistance of the Compressor Motor.
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
YES
YES
NO
OLP works within 30 sec. in forcible OLP operation
by turning instant power on _ NO _
NO
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.
YES
Replace OLR
-12-
PTC
Poor starting or no
operating of the Compressor.
First, separate the PTC from
the Compressor and check the
4D
voltage between NO 5 and 6
in the PTC with a muititester or
Wheatstone Bridge.
F
Separate the OLP from the Compressor and check resistance value
4m
between two terminals of
OLP with Tester.
Normal _ Check another
__ Abnormal _ Replace the
_{_ Abnormal _ Replace the
electric components.
PTC.
PTC.
-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
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