LG GR-151 User Manual

SAFETY PRECAUTIONS

Please read the following before servicing your refrigerator.

1. Check if electric leakage occurs in the set.

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

3. If testing with power on, wear rubber gloves to prevent
electric shock,

4. Be sure to check regular current, voltage, and capacity.

5. Don't touch metal products in a cold freezer
compartment with wet hands. It may cause frostbite or
other injury.

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

7. When tilting 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 to
prevent injury by sharp fins of the evaporator.

9. Do not open the sealed refrigeration system. It could
cause injury or pollute the air. Leave this job to an
autherized servicer with the appropriate refrigerant
recovery equipment.

SERVICING PRECAUTIONS

AIR RECHARGING IN COMPRESSOR

Test the refrigeration system by connecting it electrically
before beginning the refilling operation. This is necessary
to ascertain the function of the motor-compressor and
identify defects immediately. If defects have been found,
empty the old system of R134a residue by breaking off the
end of the extension piece at its narrow point. (Figure 1)

Use the appropriate refrigerant recovery equipment.
Replace the filter and any damaged components. Unsolder
and pull off the piece remaining inside the service tube and

then attach an extension 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

PRES;

GAUGE

Figure 3 Figure 4

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If case that a considerable leakage occurs, it will be
necessary to stop the vacuum pump and add a small
quantity of Freon to the system, if vacuum should not be
obtained (pressure gauge doesn't fall to 1 atmosphere,)
Start the refrigeration unit and find the leakage with a
special leak4inder. When the defective soldering point is
visible, repair it after opening the extension tube valve and
reestablishing the normal outside pressure inside the
system.

Because the melted solder is sucked into the tubes and
blocks them, the pressure must be rebalanced when
vacuum is in the system for 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
R-134a CYLINDER

TO THE

REFRIGERATION

SYSTEM

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 from 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

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 thereafter,
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.

Use ONLY R134a refrigerant.

Do not substitute any other type refrigerant.

Do not mix refrigerants.

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1. SPECIFICATIONS

1-1 GR-151

ITEMS

DOOR TYPE

NET CAPACITY

CONDENSER TYPE

DEFROSTING SYSTEM

TEMPERATURE CONTROL

INSULATION DOOR

CABINET

SPECIFICATIONS

1 DOOR

4.42ft 3

WALL CONDENSER

(FLUSH BACK)

MANUAL

KNOB DIAL
POLYURETHANE
POLYURETHANE

ITEMS

EVAPORATOR

DIMENSION (W X H X D)

NET WEIGHT

REFRIGERANT

LUBRICANT NS Series

COMPRESSOR

SPECIFICATIONS
ROLL BOND TYPE
19 X 331/2X 215/8in

66.14 Ib

R-134a (3.35 oz)

HTS-150 FREOLc_22G

(180 cc) (180 cc)

2. PARTS IDENTIFICATION

EVAPORATOR(Inside Door)

- The heart ofthe refrigerator. _\\

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

__THERMOSTAT

Regulates the operation of

J

the motor and controls the
temperature inside the
refrigerator.

ICECUBETRAY
Ice cubes are easy to
remove from the tray

Keeps bottles, cans, or jars.

DRIP TRAY

Catches the water that
drips off the evaporator
when defrosting.

PLASTIC COATED
SHELVES
Have full width and can
slide out.

=RTER

Keeps any kinds of bottles.

GASKET

Tight fitting door seal

keeps all the cooling
power locked inside.

No hooks or latches.

GLASSLID&VEGETABLECONTAINER

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

BAR
Keeps cans.

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3. DISASSEMBLY

* Disconnect the power before working on the refrigerator.

A. DOOR

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

3. Pull off Knob Dial. (Figure 8)

4. Pull out thermostat in the thermostat cover, and
disconnect lead wires. (Figure 10)
NOTE : Replace a proper specification new thermostat.

Figure 7

B. THERMOSTAT

1. Seperator feeler of thermostat from evaporator.

2. Loosen I screw holding the case to remove the
Thermostat cover. (Figure 9)

Figure 8 Figure 9

Figure 10

C. COMPRESSOR AND PTC

1. Remove Protector Cover, Power Cord, and Lead Wire
first. (Figure 11)

2. Remove OLR

3. Remove PTC.

4. Remove the Compressor Base by loosening 4 bolts
fixed to base plate of the set. (Figure 12)

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,

condenses this gas and then delivers to Condenser.

• PTC is abbreviation of Positive Temperature Coefficient,

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

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