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LG GR-051CN Servicing Precautions

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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 begee beginning 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
CHARGE TUBE
FEMALE
BROKEN
EXTENSION
HANSEN
MALE
HANSEN
SERVICE TUBE
SOLDERING
EXTENSION
POINT
Figure 1
Figure 2
PRESSURE
GAUGE
Figure 3
Figure 4
-3-

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  Summary of Contents for LG GR-051CN

  • Page 1 SAFETY PRECAUTIONS Please read the following before servicing your refrigerator. 6. Prevent water flowing to electric elements in mechanical 1. Check if electric leakage occurs in the set. parts. 2. When servicing current applying parts, unplug prior to 7. When tilting the set, remove any materials on the set, servicing.
  • Page 2 If a considerable leakage occurs, it will be necessary to Before performing this operation (if the vacuum pump and stop the vacuum pump will be necessary and add a small refilling cylinder are connected), make sure that the valve quantity of Freon to the system, if vacuum should not be placed between the vacuum pump and refilling tube are obtained (pressure gauge doesn't fall to 1 atmosphere.) closed to keep the Freon from adding to the system.
  • Page 3: Specifications

    1. SPECIFICATIONS ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS INSULATION DOOR POLYURETHANE DOOR TYPE 1 DOOR CABINET POLYURETHANE NET CAPACITY 46 ! EVAPORATOR ROLL BOND TYPE CONDENSER TYPE WALL CONDENSER 177h6X 193/4X 173/4in DIMENSION (WX H X D) (FLUSH BACK) NET WEIGHT 15 Kg DEFROSTING SYSTEM MANUAL...
  • Page 4 3. DISASSEMBLY * Disconnect the power before working on the refrigerator. A. DOOR C. COMPRESSOR AND PTC 1. Remove Protector Cover, Power Cord, and Lead Wire 1. Loosen 1 screw holding an cover hinge and 3 screws holding an upper hinge to separate the door body. first.
  • Page 5: Circuit Diagram

    4. CIRCUIT DIAGRAM CIRCUIT DIAGRAM "R_ERMOSTAT YL :YELLOW BK :BLACK BL:BLUE GN(GN/YL) _ _: -_____ GN:GREEN PK:PINK ,,,'_=Ii F.,,,_.,u BE[ _M. M j::_.MPRESSO P.'_CSTARTER THE PLUG TYPE ON CIRCUIT DIAGRAM IS SUBJECT TO CHANGE IN DIFFERENT LOCALTIES. 3854JD1009E NOTE : This is a basic circuit diagram. The specifications vary in different localities.
  • Page 6: Troubleshooting

    5. TROUBLESHOOTING DEFECT CAUSE REMEDY EFFECT SYSTEM Evaporatordoes not frost even An empty refrigerantsystem Leakagemust be eliminated by PARTIALLY OR though motor-compressorruns indicatesa leakage of R134a.This resolderingthe defective pointor COMPLETELY OUT continually. lossis generallyto be lookedfor at substitutingthe damaged OF REFRIGERANT the soldering pointsconnectingthe evaporator, CHARGE...
  • Page 7 NO COOLING Check if the current The Compressor Replace the Poor contacting point doesn't run, Thermostat, flows at the contacting point of the Thermostat, Check if the current Replace the Coil shorted flows at the main coil of Compressor, the Comprossor, Poor running of the Compressor.
  • Page 8 COMPRESSOR AND ANOTHER ELECTRIC COMPONENTS PTC-STARTER, Replace the OLP works within 30 sec. in forcible OLP operation byturning instant power on a o,. Measure minimum starting voltage after checking steps 1-3 above, Check the Starts at the voltage Normal. Measure the pressure balance of of 85% below.
  • Page 9 First, separate the PTC from the Compressor and check the Poor starting or no voltage between NO 5 and 6 operating of the in the PTC with a muititester or Compressor. Wheatstone Bridge, electric Check other components. Replace the PTC, Replace the PTC, Separate the OLP from...
  • Page 10 6. EXPLODED VIEW & NOTE : Parts are subject to change in different localities. -12-...