CAUTIONBEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL.

MODEL: GC-151

REFRIGERATORSERVICE MANUAL

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SAFETY PRECAUTIONS .................................................................................................................................................... 2

SERVICING PRECAUTIONS ............................................................................................................................................... 3

SPECIFICATIONS ................................................................................................................................................................ 4

PARTS IDENTIFICATION .................................................................................................................................................... 4

DISASSEMBLY .................................................................................................................................................................... 5

DOOR ................................................................................................................................................................................ 5

THERMOSTAT .................................................................................................................................................................. 5

COMPRESSOR AND PTC ................................................................................................................................................ 5

CIRCUIT DIAGRAM ............................................................................................................................................................. 6

TROUBLESHOOTING .................................................................................................................................................... 7-10

NO COOLING .................................................................................................................................................................... 8

COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS ........................................................................................ 9

PTC ................................................................................................................................................................................. 10

EXPLODED VIEW ........................................................................................................................................................ 11-12

REPLACEMENT PARTS LIST ......................................................................................................................................... 13-

CONTENTS

Please read the following instructions before servicing yourrefrigerator.

1. Check the refrigerator for current leakage.

2. To prevent electric shock, unplug before servicing.

3. Always check line voltage and amperage.

4. If you use any kind of appliance, check regular current,voltage and capacity.

5. Don't touch metal products in the freezer with wethands. This may cause frostbite.

6. Prevent water from following onto electric elements inthe mechanical parts.

7. Close the top door before opening the bottom door.Otherwise, you might hit your head when you stand up.

8. When tilting the refrigerator, remove any materials onthe refrigerator, especially the thin plates(ex. Glassshelf or books.)

9. When servicing the evaporator, wear cotton gloves.This is to prevent injuries from the sharp evaporatorfins.

10. Leave the disassembly of the refrigerating cycle to aspecialized service center. The gas inside the circuitmay pollute the environment.

SAFETY PRECAUTIONS

- 2 -

AIR RECHARGING IN COMPRESSORTest the refrigeration system connecting it electrically beforerefilling operation. It is necessary to ascertain the functionof the motor-compressor and identify the defectsimmediately. If defects have been found, empty the oldsystem of possible R-134a residue by breaking off the endof the extension piece at its narrow point. (Figure 1)Replace the filter and any damaged components. Unsolderand pull off the piece remaining inside the service tube andthen attach an complete extension with male Hansen andat last, solder it to the same tube again. (Figure 2)

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

Air evacuating from the system begins as soon as thepump starts. The refrigeration system must be kept undervacuum until the reading on the low-pressure gaugeindicates vacuum (0 absolute, -1 atm., -760 mm hg) in anycase it is advisable to keep the pump running for about 30minutes. (Figure 3)In case that a considerable leakage occurs it will benecessary to stop the vacuum pump and to add asmallquantity of Freon to the system, if vacuum should not beobtained (pressure gauge can't fall to 1 atmosphere), startthe refrigeration unit and find the leakage with the specialleak-finder. When the defective soldering point is visible,re-do it after opening the extension tube valve andreestablishing the normal outside pressure inside thegroup.Because the melted alloy is sucked into the tubes andblock them, the pressure must be rebalanced whenvacuum is in the system in soldering. As soon as the

vacuum operation is over, add the quantity in grams of R-134a to the refrigeration system. Remember that everysystem has an exact quantity of R-134a with a tolerance of±5 grams that can be added. (Figure 4)

Before performing this operation (if the vacuum pump andrefilling cylinder are connected), make sure that the valveplaced between the vacuum pump and the refilling tube areclosed in order to keep the Freon for addition to the system.(Figure 5)

In addition, check the graduated scale on the cylinder forthe quantity of R-134a to be added, for example, if wehave 750 grams of Freon in the cylinder and must add 140grams to the group, this amount will be reached when R-134a has dropped to 610 grams, remembering that theindicator shows a lower limit of meniscus. Do this afterchoosing the scale corresponding to the gas pressuredifferent scales reported as the same gas pressureindicated by the pressure gauge on the top of the column.To make R-134a flow into the system, open the valveplaced at the base of the cylinder and connected to thefilling tube. The amount of Freon cannot be added to thesystem all at once because it may cause a blocking of motor-compressor. Therefore, proceed by adding the originalquantity of about 20-30 grams and close the valveimmediately.The pressure rises and the motor compressor must startsucking the gas and lowering the pressure again. Regulatethe valve again, maintaining the same manner untilreaching to the quantity of R-134a established for thesystem being charged. When the system is running, thesuction pressure must be stabilized between 0.30 to0.6(0.10 to 0.4) atmosphere.

SERVICING PRECAUTIONS

- 3 -

POINT TO BE BROKEN

SERVICE TUBE EXTENSION

CHARGE TUBEEXTENSION

FEMALEHANSEN

MALE HANSEN

SOLDERING POINTFigure 1 Figure 2

TO THEVACUUMPUMP

PRESSUREGAUGE

Figure 3

TO THE R-134a CYLINDER

TO THE REFRIGERATIONSYSTEM

Figure 4

FILLING ORCHARGE TUBE

VALVE TO BE OPENEDWHEN REFILLING

VALVE TO BE CLOSEDAFTER VACUUM

TO THE CHARGE CYLINDER

TO THE REFRIGERATIONSYSTEM

TO THE VACUUMPUMP

Figure 5

1. SPECIFICATIONS

2. PARTS IDENTIFICATION

- 4 -

EVAPORATOR(Door Inside)- The heart of the refrigerator.- It evaporates the refrigerant

fluid and thereby absorbsheat from the surrounding.

ICE CUBE TRAY(Door Inside)Ice cube is easy to removefrom the tray

DRIP TRAYCatches the water thatdrips off the evaporatorwhen defrosting.

PLASTIC COATEDSHELVESHave full width and canslide out.

GLASS LID & VEGETABLECONTAINER

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

THERMOSTATRegulates the operation ofthe motor and controlls thetemperature inside therefrigerator.

SUPPORTER CANKeeps any kinds of bottles.

MAGNETIC GASKET- Tight fitting door seal

keeps all the coolingpower locked inside.

- No hooks or latches.

ITEMS SPECIFICATIONS

DOOR TYPE 1 DOOR

CONDENSER TYPE WALL CONDENSER

(FLUSH BACK)

DEFROSTING SYSTEM MANUAL

TEMPERATURE CONTROL KNOB DIAL

ITEMS SPECIFICATIONS

INSULATION DOOR POLYURETHANE

CABINET POLYURETHANE

EVAPORATOR ROLL BOND TYPE

DIMENSION (mm) 484X549X850 (WXDXH)

NET WEIGHT (kg) 30kg

REFRIGERANT R-134a (115g)

LUBRICANT OIL FREOL @22G (180cc)

A. DOOR1. Loosen 3 screws holding an upper hinge to separate the

door body. (Figure 7)

B. THERMOSTAT1. Pull Konb Dial.2. Loosen 1 screw holding the case and pull it out to

remove the Thermo cover. (Figure 8)

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

NOTE : Replace a new thermostat with proper specification.

C. COMPRESSOR AND PTC1. Remove Protector Cover, Power Cord and Lead Wire

first. (Figure 10)2. Separate OLP.3. Separate PTC.4. Remove the Compressor Base by loosening 4 bolts

fixed to base plate of the set. (Figure 11)

5. Remove the Compressor by loosening 2 earth screwsnext 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 OLP.

3. DISASSEMBLY

- 5 -

Figure 7

Figure 10 Figure 11

Figure 8

Figure 9

Note: Reversing the doors is not covered by the warranty.

4. CIRCUIT DIAGRAM

- 6 -

NOTE: Lamp is option part.

5. TROUBLESHOOTING

- 7 -

DEFECT EFFECT CAUSE REMEDY

GROUP PARTIALLYOR COMPLETELYOUT OFREFRIGERANTCHARGE

EXCESSIVELYFULL

HUMIDITY IN THESYSTEM

PRESENCE OF AIRIN THE SYSTEM

BLOCKEDCAPILLARY

MOTOR-COMPRESSORSHORT-CIRCUITEDOR BLOCKED

MOTOR-COMPRESSORDOSE NOTCOMPRESS

NOISY MOTOR-COMPRESSOR

Evaporator dose not frost eventhough motor-compressor runscontinually.

This defect is indicated by thepresence of water outsiderefrigerator near the motor causedby formations of ice on the returntube.

This defect is indicated by the partialfrosting of the evaporator and bycontinual defrosting cyclesdetermined by the interruption of theflow of gas on the evaporator. Themotor compressor keeps running.

Poor performance of the refrigerantsystem which is indicated: on theevaporator with a slight frost whichdose not freeze and an excessiveoverheating of the condenser andmotor-compressor.

Because of the lack of circulationFreon in the system, there is nofrosting of the evaporator, while aslight overheating of the first spiralof the condenser is noted.

The system dose not work and the"clixson" intervenes interruptingdelivery to the motor-compressor.

No frost forms on the evaporatoreven if the motor-compressor isapparently running regulary.

In case of mechanical failure in themotor-compressor there in anexcessive noise when the system isfunctioning: in case a suspensionspring is unhooked, banging will beheard and there will be especiallystrong vibrations when the systemstarts up and stops.

An empty refrigerant systemindicates a leakage of R12. This lossis generally to be looked for at thesoldering points connecting thevarious components or in aneventual hole in the evaporatormade by the user.

If in the refrigerant system a quantityof R12 is introduced which is greaterthan that indicated, the excess gasdose not terminate its expansion inthe evaporator but proceeds into thereturn tube.

The refrigerant system is humidwhen there is a small percentage ofwater present which, not completelyretained by the dehydrator filter,enters into circulation with the Freonand freezes at the capillary exit inthe evaporator.

There is air in a refrigerating systemwhen during the filling phasevacuum is not effected or it is notadequately done.

Eventual impurities contained in theFreon or in the components of therefrigeration system beforeassembly and not retained by thefilter can obstruct the capillary.

In case of short circuit, thebreakdown is due to the electricwinding: if blocked, there is amechanical failure in the motor-compressor.

In this case there is a mechanicalfailure in the diaphram valves which:remaining continually open, do notpermit the piston to suck andcompressor the whichconsequentely dose not circulate inthe system.

The cause of the excessive noise isnormally to be sought for in amechanical break down, and onlyrarely in the unhooking of one of thesuspension springs.

Leakage must be eliminated byresoldering the defective point orsubstituting the damagedevaporator.

The system must be emptied andsubsequently refilled introducing thecorrect quantity of R-134a.

The system must be emptied andthen refilled after eliminating thehumidity.

Group must be drained andsubsequently refilled after carefullycreating vacuum.

To restore the system it must beemptied, substitute the capillary orthe evaporator entirely in case thecapillary is coaxial with respect tothe return tube, then refill it.

The motor-compressor must bereplaced and then proceed withrefilling.

The motor-comprossor must bereplaced and then proceed withrefilling.

The motor-comprossor must besubstituted and then proceed withthe refilling.

NO COOLING

- 8 -

The Compressordoesn't run.

Poor running of theCompressor.

Compressor runs.

Check if the currentflows at the contactingpoint of the Thermostat.

Check the currentflowing of startingsystem.

Check the componentson the main circuit.

Measure the startingvoltage.

Check if the currentflows at the contactingpoint of the startingsystem.

Is the current amount ofthe electric componentsnormal?

Check if the currentflowing of the sub coil ofthe Compressor.

Frost doesn't form at theEvaporator whenoperating set for morethan 30 min.

Check if the currentflows at the main coil ofthe Comprossor.

Poor contacting point

Coil shorted

Low voltage

Shorted

Poor contacting pointand broken

The coil of theCompressor Motor isworn out.

Refrigerant leaks.Poor compressing.

Increase the voltage.

ShortedBroken

Replace theThermostat.

Replace thecomponents.

Replace the device.

Replace theCompressor.

Repair theCompressor.

Repair theCompressor.

Replace theCompressor.

Replace the device.

COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS

- 9 -

1

2

3

4

5

2

4

3

3

4

4

5

5

NO

NO

NO

NO

NO

YES

YESYES

YES

YES

YESPower Source

Check theresistance of thePTC.

Check OLP.

Check thestarting state.

Check theresistance of theCompressor Motor.

Separate the PTC-STARTER fromthe Compressor and measure thevoltage between M and C of theCompressor.

Equal to the appliedvoltage. (Ratingvoltage ± 10%)

Advice the customerto use in the fixedrange.

Replace thePTC-STARTER.

Starts at the voltageof 85% below.

Replace the PTC.

Check the startingstate at the regularvoltage above.

Replace OLP.

Normal.

Normal.

OLP works within 30 sec.in forcible OLP operationby turning instant power onand off.

The applied voltage is not in therange of Rating Voltage ± 10%.

Test the resistance amongM-C, S-C, and M-S.

Test the resistance of the bothterminals in the PTC-STARTER.

Check if applying aregular OLP.

Measure minimum starting voltageafter checking steps 1-3 above.And measure the pressure balanceof the PTC with the interval ofmore than 5 min.

Starts at the voltage ofmore than 90%.

Replace the Compressor.

PTC

- 10 -

6 5

YES

NO

Poor starting or nooperating of theCompressor.

First, separate the PTC fromthe Compressor and check thevoltage between NO 5 and 6in the PTC with a multitesteror Wheatstone Bridge.

Separate the OLP fromthe Compressor andcheck resistance valuebetween two terminals ofOLP with Tester.

The value is in therange of 15-28 forthe 22Ω PTC.

Check anotherelectric components.

Replace OLP.

The value is 0.

The value is ∞.

NormalCheck anotherelectriccomponents.

Replace thePTC.

Replace thePTC.

Abnormal

Abnormal

NOTE: 1. The shape of parts are subject to change in different localities.2. *: optional parts GC-151S

- GLASS, COVER-T/V : 149B- STELL, COVER-T/V : 136C, 149A- LAMP : 406B, 408B, 409B

6. EXPLODED VIEW

- 11 -

411A

317A

310A

309A

308A

307A

312A

315A

127A

281B

302A

104A

283A318A

313A

416A

410A

*410G

*328A

328B

*: optional parts GC-151S

- 12 -

*151A

125A

*149B

207A

201A

*406B

126A

136A

136A

*136C

*281D

110B 110C

*409B

110A

*408B

*149A

110F

REPLACEMENT PARTS LIST

MODEL NAME:GC-151SA LG REFERENCE NO:GC-151SA.CSWPCIL

S AL LOC No. PART No. Description SPEC REMARK

R 104A 4778JQ3003A LEG,ADJUST

R 110A 6930JR1001G THERMOSTAT

R 110B 3550JD1062H COVER,THERMO

R 110C 4940JA3007A KNOB,THERMO

R 125A 3390JA3006A TRAY,ICE

R 126A 3390JA3020A TRAY,DRIP

R 127A 3580JD1041B DOOR,EVA

R 136A 5026JA1180C SHELF,R

R 149B 4890JA2002D GLASS,SHELF

R 151A 3390JA3052C TRAY,VEGETABLE

R 201A 5433JA2038D DOOR FOAM ASSEMBLY,R

R 207A 4270JA3002C BAR

R 281B 4775JA3010C HINGE ASSEMBLY,U

R 283A 4775JA2021C HINGE ASSEMBLY,L

R 302A 5421JA0037A EVAPORATOR ASSEMBLY

R 307A 2521CRA3001 COMPRESSOR,SET ASSEMBLY NS30LAEG BR1EOIL

R 308A 6748C-0003C P.T.C ASSEMBLYP330MC LUCON PX9001F #250MURATA

R 309A 6750C-0004A O.L.P 4TM149NFBYY-520

R 310A 3550CT0008A COVER,P.T.C

R 312A J734-00005A RUBBER,SEAT

R 313A 1PZZJQ3008A PIN,DRAWING

R 315A 3103JQ3001C COMP BASE ASSEMBLY,STD

R 317A 5850JQ2001E DRIER

R 318A 4930JQ3001A HOLDER,DRIER

R 328B 5040JQ3006A RUBBER,DAMPING

R 406B 6600JR2001B SWITCH,[PUSH]PS103 PEC 250VAC 0.5A13.5MM S/WHITE

R 408B 6621JR2002A SOCKET ASSEMBLY,LAMP

R 409B 6912JR3001B LAMP,[VACUUM]240V 15W CLEAR E14/26X18NGS T22

R 410A 4810JQ2009A BRACKET,TIMER

R 411A 6411JR1001F POWER CORD ASSEMBLY

BUYER NAME:CIL

COLOR:Super White