Sears GR-051SF, GR-151SF Owner's manual

Sears GR-051SF, GR-151SF Owner's manual
SAFETY
PRECAUTIONS
Please read the followings before servicing your refrigerator.
1. Check if an electric leakage occurs in the set.
6. Prevent water flowing to electric elements in mechanical
parts.
2. When servicing current applying parts, unplug prior to
servicing.
7. When sloping the set, remove any materials on the set,
especially thin plate type(ex,: glass plates or books.).
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.
8. When servicing evaporator part, wear cotton gloves
without fail. it is to prevent wound by sharp fin of
evaporator.
5. Don't touch metal products in cold freezer room with wet
hand. It may cause frostbite.
9. Leave a breakage freezing cycle to a heavy service
center. The gas in cycle inside may soil ambient air.
SERVICING
AIR RECHARGING
PRECAUTIONS
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)
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, -t atm., -760 mm Hg) in any
case it is advisable to keep the pump running for about
30 minutes. (Figure 4)
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 BEE]
BROKEN
CHARGE TUBEE] FEMALEr
EXTENSION
HANSEN
MALEE]
HANSEN
SERVICE TUBEE]
EXTENSION
Figure I
PRE
GAUGE
SOLDERINGE]
POINT
Figure 2
Figure 3
-3-
Figure 4
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 R12 to the refrigeration system. Remember that every
system has an exact quantity of R-12 with a tolerance of
-+5grams 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 ORB
VALVE TO BE []
CHARGE TUBE
REFILLING
,PENED WHEN []
TO THE•
REFRIGERATIOND
SYSTEM
TO THE []
CHARGE[]
CYLINDER
VACUUM[
PUMP
VALVE TO BED
CLOSED[]
AFTER VACUUM
Figure 6
TO THED
R-12 CYLINDER
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-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 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.
TO THED
REFRIGERATIOND
SYSTEM
Figure 5
-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)
POINT TO BED
BROKEN
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, -t atm., -760 mm Hg) in any
case it is advisable to keep the pump running for about
60 minutes. (Figure 4)
CHARGE TUBED FEMALEF
EXTENSION
HANSEN
MALED
HANSEN
;
I
_
SERVICE TUBED
EXTENSION
Figure I
VACUUMD
PUMP
PRE
GAUGE
SOLDERINGD
POINT
Figure 2
Figure 3
-5-
Figure 4
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
Rt34a to the refrigeration system. Remember that every
system has an exact quantity of Rt34a with a tolerance of
-+5grams 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 ORD
VALVE TO BE []
CHARGE TUBE
REFILLING
OPENED WHEN D
TO THED
REFRIGERATIOND
SYSTEM
TO THE D
CHARGE[]
CYLINDER
TO THE
VACUUME
PUMP
VALVE TO BE[]
CLOSED[]
AFTER VACUUM
Figure 6
F
_
TO THE[]
Ri34a
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.
CYLINDER
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.
TOT RAT,ON[]
SYSTEM
Figure 5
-6-
1. SPECIFICATIONS
ITEMS
SPECIFICATIONS
DOOR TYPE
1DOOR
NET CAPACITY
CONDENSER
TYPE
46
ITEMS
INSULATION
l
SPECIFICATIONS
DOOR
POLYURETHANE
CABINET
POLYURETHANE
EVAPORATOR
WALL CONDENSER
DIMENSION
(FLUSH BACK)
DEFROSTING
TEMPERATURE
SYSTEM
CONTROL
MANUAL
KNOB DIAL
ROLL BOND TYPE
443(W)X501(H)X450(D)mm
NET WEIGHT
15 Kg
SHELF
1 PIECE
REFRIGERANT
LUBRICANT
R-12(40g)
R-134a(43g)
VS Series
HTS-150
FREOL a 22G
COMPRESSOR
(200cc)
(200cc)
NS Series
HTS-150
FREOL a 22G
COMPRESSOR
(180cc)
(180cc)
2. PARTS IDENTIFICATION
THERMOSTAT
Regulates the operation of
the motor and controls the
temperature inside the
refrigerator.
EVAPORATOR
The heart of the refrigerator,
It evaporates the refrigerant
fluid and thereby absorbs
heat from the surrounding.
Made of pure aluminum.
Keeps butter.
ICE CUBE TRAY
Ice cube is easy to remove
from the tray
DOOR SEAL
PLASTIC SHELF
It has full width and can
slide out and catches the
water that drips off the
evaporator when
defrosting.
Keeps the refrigerator
virtually airtight all along
the edge, but is
nevertheless easy to open.
BOTTLE SUPPORTER
Keeps bottles, cans or jars.
-7-
3. DISASSEMBLY
A. DOOR
C. COMPRESSOR
AND PTC
1. Loosen 1 screw holding an cover hinge and 3 screws
holding an upper hinge to separate the door body.
(Figure 7)
1. Remove Protector Cover, Power Cord and Lead Wire
first. (Figure 11)
2. Separate OLR
3. Separate PTC.
4. Remove the Compressor Base by loosening 4 bolts
fixed to base plate of the set. (Figure 12)
Figure 7
Figure 11
Figure 12
B. THERMOSTAT
1. Pull Knob Dial. (Figure 8)
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 attached 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
nomal operation of OLR
2. Loosen 1 screw holding the case to remove the Thermo
cover. (Figure 9)
Figure 8
Figure 9
3. Pull out thermostat in the thermostat cover, and
disconnecting 2 or 3 lead wires. (Figure 10)
NOTE : Replace a proper specification
new thermostat.
Figure 10
-8-
2000.03.13
100/70
CIRCUIT DIAGRAM
THERMOSTAT
_, i
_l
i
BK
Y"
BK
GN(GI_.)
YL :YELLOW
BK:BLACK
BL:BLUE
GN:GREEN
PK:PINK
4N-I
BL
BL_ _
__C_IOMPRESSOR
P.T.CSTARTER
THE PLUG TYPE ON CIRCUIT DIAGRAM
TO CHANGE IN DIFFRENT LOCALTIES.
IS SUBJECT
3854,JD1009E
5. TROUBLESHOOTING
DEFECT
CAUSE
EFFECT
REMEDY
GROUP PARTIALLY
OR COMPLETELY
OUT OF
REFRIGERANT
CHARGE
Evaporatordosenot frost even
though motor-compressorruns
continually.
An empty refrigerantsystem
indicatesa leakage of R_2.This loss
is generallyto be lookedfor at the
soldering pointsconnectingthe
various componentsor in an
eventual hotein the evaporator
made by the user.
Leakagemust be eliminated by
resolderingthe defective point or
substitutingthe damaged
evaporator.
EXCESSIVELY
FULL
This defect is indicatedby the
presenceof wateroutside
refrigeratornear the motor caused
byformationsof ice on the return
tube.
If in the refrigerantsystema quantity
of R_2is introducedwhich is greater
than that indicated,the excess gas
dose not terminateits expansionin
the evaporatorbut proceedsinto the
returntube.
The system mustbe emptiedand
subsequentlyrefilled introducing
the
correctquantity of R_.
HUMIDITY
SYSTEM
This defect is indicatedby the partial
frosting of the evaporatorand by
continual defrosting cyctes
determined by the interruptionof the
flow ofgas on the evaporator.The
motorcompressorkeeps running.
The refrigerantsystemis humid
when there is a small percentageof
water present which, not completely
retainedby the dehydratorfilter,
enters into circulation withthe Freon
and freezesat the capillaryexit in
the evaporator.
The system mustbe emptiedand
then refilledafter eliminatingthe
humidity.
PRESENCE OF AIR
IN THE SYSTEM
Poor performanceof the refrigerant
systemwhich is indicated:onthe
evaporatorwith a slight frost which
dose not freeze and an excessive
overheatingof the condenserand
motor-compressor.
There is air in a refrigeratingsystem
when duringthe filling phase
vacuum is not effectedor it is not
adequately done.
Groupmust be drained and
subsequentlyrefilled after carefully
creatingvacuum.
BLOCKED
CAPILLARY
Becauseof the lackof circulation
Freonin the system,there is no
frosting of the evaporator,while a
slight overheatingof the first spiral
of the condenser is noted.
Eventuatimpuritiescontained in the
Freonor inthe componentsof the
refrigerationsystembefore
assembly and not retained bythe
filter can obstructthe capillary.
Torestore the systemit must be
emptied,substitutethe capillaryor
the evaporatorentirely in case the
capillaryis coaxial with respectto
the returntube, then refill it.
MOTORCOMPRESSOR
SHOR_CIRCUITED
OR BLOCKED
The systemdose not work andthe
"clixson" intervenes interrupting
delivery to the motor-compressor.
In case of short circuit, the
breakdownis dueto the electric
winding: if blocked,there is a
mechanicalfailure in the motor-
The motor-compressormust be
replacedand then proceed with
refilling.
IN THE
compressor.
MOTORCOMPRESSOR
DOSE NOT
COMPRESS
Nofrost forms on the evaporator
even if the motor-compressoris
apparentlyrunning regulary.
In this case there is a mechanical
failure in the diaphramvalves which:
remainingcontinuallyopen, do not
permitthe pistonto suckand
compressorthe which
consequente]ydose not circulate in
the system.
The motor-comprossormust be
replacedand then proceed with
refilling.
NOISY MOTORCOMPRESSOR
in case ofmechanicalfailure inthe
motor-compressorthere in an
excessive noise when the system is
functioning: incase a suspension
spring is unhooked,bangingwill be
heardand therewillbe especially
strong vibrationswhen the system
starts up and stops.
The causeof the excessive noise is
normallyto be sought for in a
mechanicalbreak down, and only
rarely in the unhooking of oneof the
suspensionsprings.
The motor-comprossormust be
substitutedand then proceedwith
the refilling.
-10-
NO COOLING
The Compressor
doesn't run.
Check if the current
flows at the contacting
point of the Thermostat.
Poor contacting point
Replace the
Thermostat.
on
the main
circuit.
Check
the components
Check if the current
flows at the contacting
point of the starting
system.
Poor contacting point
and broken
-11 -
Replace the device.
COMPRESSOR
AND ANOTHER
ELECTRIC
COMPONENTS
Separate the PTC-STARTER from
the Compressor and measure the
voltage between M and C of the
Compressor.
YES
YES
NO
OLP works within 30 sec.
in forcible OLP operation
YES
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.
-12-
PTC
Poor starting or no
operating of the
Compressor.
First, separate the PTC from
the Compressor and check the
voltage between NO 5 and 6
in the PTC with a multitester
or Wheatstone
Bridge.
Separate the OLP from
the Compressor and
check resistance value
between two terminals of
OLP with Tester.
-13-
6. EXPLODED
VIEW
I
I
NOTE : The shape of parts are subject to change in different localities.
-14-
7. EXPLODED
VIEW
&
NOTE : The shape of parts are subject to change in different localities.
-15-
WALMART(WAL)
Electrical
ITEM
BUYER MODEL NAME
RATED INPUT(W)
Specification
GR-051SF
GR_051SF
70+15%
DEFROST INPUT(W)
ENERGY CONSUMPTION(kwh/yr)
288
AMPERE(Amp)
0.84
RATING(V/Hz)
115/60
REFRIGERANT
R134a
CHARGE(Oz)
1.41
COMPRESSOR
NS24LBCM
OLP
4TM232NFB
PTC
P6R8MD
CAPACITOR-R
CAPACITOR-S
10pF/250VAC
HOME
DEPOT(HDP)
Electrical
ITEM
Specification
GR-051SF
GR-131SF
GR=151SF
GR_051SF
GR_131SPF
GR-151SPF
70+15%
70+15%
70+15%
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
1.41
2.12
3.35
COMPRESSOR
NS24LBCM
NS24LBCG
NS30LACM
OLP
4TM232NFB
4TM232NFB
4TM265MFB
PTC
P6R8MD
P6R8MC
P6R8MD
BUYER MODEL NAME
RATED INPUT(W)
DEFROST INPUT(W)
CHARGE(Oz)
CAPACITOR-R
CAPACITOR-S
101JF/250VAC
101JF/250VAC
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