LG GR-151SPF Owner's manual

LG GR-151SPF Owner's manual

SAFETY PRECAUTIONS

Please read the followings before servicing your refrigerator.

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.

6. 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-t 2 residue by breaking off the end of the extension piece at its narrow point. (Figure 1)

Replace the filter and any damaged component& 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 BED

BROKEN

CHARGE TUBED FEMALE[

EXTENSION HANSEN

SERVICE TUBED

EXTENSION

Figure

1

MALED

HANSEN

SOLDERINGD

POINT

Figure 2 Figure 3

GAUGE

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

-+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

_ CHARGE TUBE

_L

TO THE[]

REFRIGERATIOND

SYSTEM

TO THED

VACUUM[

PUMP

VALVE TO BE []

REFILLING

OPENED WHEN []

k_

TO THE []

CHARGE[]

CYLINDER

VALVE TO BE[]

CLOSEDD

AFTER VACUUM

Figure 6

1 TO THED

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.

7L' 7R

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.

SYSTEM 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 BEB

BROKEN

CHARGE TUBED FEMALEC

EXTENSION HANSEN

SERVICE TUBEB

EXTENSION

Figure

1

MALE£]

HANSEN

SOLDERINGE]

POINT

Figure 2 Figure 3

GAUGE

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

-+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

CHARGE TUBE

TO THE[]

REFRIGERATION[]

SYSTEM

TO THEE

VACUUM[

PUMP

VALVE TO BE D

REFILLING

OPENED WHEN []

TO THE []

CHARGED

CYLINDER

VALVE TO BED

CLOSEDD

AFTER VACUUM

_-__

TO THED

R-134a CYLINDER

Figure

5

TO THEE]

REFRIGERATION[]

SYSTEM

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-

1. SPECIFICATIONS

1-1 GR-151

ITEMS

DOOR TYPE

NET CAPACITY

CONDENSER TYPE

DEFROSTING SYSTEM

TEMPERATURE CONTROL

INSULATION DOOR

CABINET

SPECIFICATIONS

1DOOR

124 l

WALL CONDENSER

(FLUSH BACK)

MANUAL

KNOB DIAL

POLYURETHANE

POLYURETHANE

ITEMS

EVAPORATOR

DIMENSION

NET WEIGHT

REFRIGERANT

LUBRICANT

LUBRICANT VS Series

COMPRESSOR

NS Series

COMPRESSOR

SPECIFICATIONS

ROLL BOND TYPE

484(W)X850(H)X549(D)mm

30 Kg

R_12 (80g)

R-12(80g)

HTS*150

R-134a(95g)

FREOL (z22G

(200cc)

HTS*150

(180cc)

(200cc)

FREOL (z22G

(180cc)

2. PARTS IDENTIFICATION

EVAPORATOR(Door Inside)

- The heart of the refrigerator.

- It evaporates the refrigerant fluid and thereby absorbs heat from the surrounding.

ICE CUBE TRAY(Door Inside)

Ice cube is easy to remove from the tray

__

\4,,\

\\\

\

\

\

DRIP TRAY

Catches the water that drips off the evaporator when defrosting.

PLASTIC COATED

SHELVES

Have full width and can slide out,

GLASS LID & VEGETABLE

CONTAINER

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

-7-

THERMOSTAT

Regulates the operation of the motor and controlls the temperature inside the refrigerator.

3AN

Keeps any kinds of bottles.

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

- No hooks or latches.

3. DISASSEMBLY

A. DOOR

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

C. COMPRESSOR AND PTC

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

B. THERMOSTAT

1. Seperator feeler of thermostat from evaporator.

2. Loosen 1 screw holding the case to remove the Thermo cover. (Figure 9)

Figure 11 Figure 12

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 8 Figure 9

3. Pull Knob DiaL(Figure 8)

4. Pull out thermostat in the thermostat cover, and disconnecting lead wires. (Figure 10)

NOTE : Replace a proper specification new thermostat.

Figure 10

-8-

2000.03.13

100/70

_, i

_l

4N-I

i

CIRCUIT DIAGRAM

THERMOSTAT

BK

BK

YL :YELLOW

BK: BLACK

BL : BLUE

GN: GREEN

PK:PINK

BL

BL_ _ __C_IOMPRESSOR

P.T.CSTARTER

THE PLUG TYPE ON CIRCUIT DIAGRAM IS SUBJECT

TO CHANGE IN DIFFRENT LOCALTIES.

3854,JD1009E

TROUBLESHOOTING

DEFECT

GROUP PARTIALLY

OR COMPLETELY

OUT OF

REFRIGERANT

CHARGE

EXCESSIVELY

FULL

EFFECT

Evaporatordose not frost even though motor-compressorruns continually.

This defect is indicatedby the presence of water outside refrigerator near the motor caused by formationsof ice on the return tube.

CAUSE

An empty refrigerantsystem indicates a leakage of R_2.This loss is generallyto be lookedfor at the soldering pointsconnectingthe various componentsor in an eventual hole in the evaporator made by the user.

REMEDY

Leakagemust be eliminatedby resolderingthe defective point or substitutingthe damaged evaporator.

If in the refrigerantsystema quantity of R_2is introducedwhich is greater than that indicated,the excess gas dose net terminateits expansionin the evaporator but proceedsinto the return tube.

The systemmust be emptiedand subsequentlyrefilled introducingthe correctquantity of R_2.

HUMIDITY IN THE

SYSTEM

This defect is indicated by the partial frosting of the evaporatorand by continual defrosting cycles flow of gas on the evaporator.The

motor compressorkeeps running.

The refrigerantsystemis humid when there is a small percentageof water present which, not completely retained by the dehydrator filter, enters into circulation with the Freen and freezes at the capillaryexit in the evaporator.

The systemmust be emptiedand then refilledafter eliminatingthe humidity.

PRESENCE OFAIR

IN THE SYSTEM

BLOCKED

CAPILLARY

Poor performanceof the refrigerant system which is indicated: on the evaporator with a slight frost which dose not freeze and an excessive overheatingof the condenserand motor-compressor.

There is air in a refrigeratingsystem when during the filling phase vacuum is not effectedor it is not adequately done.

Group must be drained and subsequentlyrefilled after carefully creatingvacuum.

Becauseof the lack of circulation

Freon in the system, there is no frosting of the evaporator,while a slight overheatingof the first spiral of the condenseris noted.

Eventual impuritiescontained in the

Freonor in the componentsof the refrigerationsystem before assembly and not retained bythe filter can obstruct the capillary.

Torestore the systemit must be emptied,substitute the capillaryor the evaporator entirely in case the capillaryis coaxial with respect to the returntube, then refill it.

MOTOR-

COMPRESSOR

SHOR%CIRCUITED

OR BLOCKED

MOTOR-

COMPRESSOR

DOSE NOT

COMPRESS

NOISY MOTOR-

COMPRESSOR

The system dose not work andthe

"clixson" intervenes interrupting deliveryto the motor-compressor.

No frost forms on the evaporator even if the motor-compressoris apparentlyrunning regulary.

In case of short circuit, the breakdown is dueto the electric winding: if blocked,there is a mechanicalfailure in the motorcompressor.

The motor-compressormust be replacedand then proceed with refilling.

In this case there is a mechanical failure in the diaphramvalves which: remaining continuallyopen, do not permit the pistonto suckand compressorthe which consequentelydose not circulate in the system.

The motor-compressormust be replacedand then proceed with refilling.

In case of mechanicalfailure in the motor-compressorthere in an excessive noise when the systemis functioning: in case a suspension spring is unhooked,bangingwill be heard and there will be especially strong vibrationswhen the system starts up and stops.

The causeof the excessive noise is normally to be soughtfor in a mechanical breakdown, and only rarely in the unhookingof one of the suspensionsprings.

The motor-comprossormust be substitutedand then proceedwith the refilling.

-10-

NO COOLING

]__ flows at the contacting point of the Thermostat.

Check if the current I_

Poor contacting point

H

Replace the

Thermostat.

-_ flowing of starting system.

the

"_) flows at the main coil of

Broken

Coil shorted

H

Replace the device.

H

Replace the

Compressor.

.___. Check the components on the main circuit.

_ Replace the

J

Poor running of the

Compressor.

I_

Low voltage

H

Increase the voltage.

flows at the contacting point of the starting

Check if the current system.

_4_

Poor contacting point and broken

H

Replace the device.

"--)

tChoc if' eco rent

H oo'aoe' e the Compressor.

Compressor runs.

t normal?

I i_

.I

worn out.

I

_1

.I

Repair the

Frost doesn't form at the I

I

Evaporator when operating set for more than 30 min.

,J i

Poor compressing.

Refrigerant leaks.

H

Repair the

Compressor.

-11 -

[_

COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS

Power Source I

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

Compressor.

_[ voltage. (Rating voltage _+10%) qual to the applied

The applied voltage is not in the range of Rating Voltage _+10%.

H to use in the fixed

Check the resistance of the

Compressor Motor.

M-C, S-C, and M-S.

Test the resistance among

YES

[_

Replace the Compressor.

11

Check the resistance of the

I

J_l

I Test the resistance of the both terminals in the PTC-STARTER.

NO

Check OLR

Check the starting state.

YES ,[_

Replace the

PTC-STARTER.

regular OLR

Check if applying a 1._

NO

OLP works within 30 sec.

in forcible OLP operation by turning instant power on and off.

YES

I

NO

,_.

,_

Replace OLP.

f

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.

._

of 85% below.

Starts at the voltage

Normal.

Starts at the voltage of more than 90%.

Normal.

J state at the regular

____ Check the starting

,_NO

Replace the PTC.

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.

._

range of 15-28 for Normal

_-_ The value is 0.

H

Abnormal

"_ The value is i -.

_'_

Abnormal

.-.)

Separate the OLP from the Compressor and check resistance value between two terminals of

OLP with Tester.

YE_

"-'N-'Q--_ Replace OLP" l

Check another electric components.

Replace the

PTC.

-13-

5. EXPLODED VIEW

-14-

I

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement