LG GR-122SJ Service Manual ▷ View online
1. DOOR
Freezer Door
1. By taking out two screws attaching in lower hinge,
1. By taking out two screws attaching in lower hinge,
disassemble the freezer door. (Figure 6)
Refrigerator Door
1. Disassemble the sheet hinge assembly by remove two
1. Disassemble the sheet hinge assembly by remove two
screws attaching the sheet hinge assembly to the body.
(Figure 7)
(Figure 7)
2. DOOR SWITCH
1. Remove the assembly and the control box located on
the upper right hand side of the freezer, and take out the
switch. Remove lead socket from the switch.
switch. Remove lead socket from the switch.
2. Pull out the lead socket.
3. THERMOSTAT
Take out the knob from the control box assembly and
detach the thermostat. (Figure 9)
detach the thermostat. (Figure 9)
4. FAN AND FAN MOTOR
1. Detach fan grill with minus driver.
Be careful not to destroy the fan grill. (Figure 10)
2. Detach the hook connected between the fan grill and the
shroud. Disassemble the shroud. (Figure 11)
3. Take out fan motor assembly by removing two screws
that attached to the shroud. Pull out the fan from the fan
motor assembly.
motor assembly.
3. DISMANTLE
- 6 -
Figure 6
Figure 7
Contro box
Door switch
Lead socket
Figure 8
Figure 9
Figure 10
Figure 11
5. DEFROST THERMOSTAT
1. After removing the fan grill, unfasten the tie wrap.
2. Disconnect 2 lead wires connected to the defrost
2. Disconnect 2 lead wires connected to the defrost
thermostat. (Figure 12)
6. LAMP
1. Remove all shelves in the refrigerator.
2. Remove the lamp, in the grill part of the control box-R,
2. Remove the lamp, in the grill part of the control box-R,
by turning it counterclockwise. (Figure 13)
1. COMPRESSOR
Role
The compressor inhales low temp. and low pressure gas
evaporated from Evaporator of the refrigerator, and
condenses this gas to high temp. and high pressure gas,
and then plays delivering role to Condenser.
Composition
The compressor is Composed of Compressor Apparatus
compressing gas, Compressor Motor moving Compressor
Apparatus and Case protecting Compressor Apparatus
and Motor.
There are PTC-Starter, and Over Load Protector in the
Compressor outside.
On the other hand, because the Compressor consists of
1/1000mm processing precision components and is sealed after
producing without dust or humidity, deal and repair with care.
The compressor inhales low temp. and low pressure gas
evaporated from Evaporator of the refrigerator, and
condenses this gas to high temp. and high pressure gas,
and then plays delivering role to Condenser.
Composition
The compressor is Composed of Compressor Apparatus
compressing gas, Compressor Motor moving Compressor
Apparatus and Case protecting Compressor Apparatus
and Motor.
There are PTC-Starter, and Over Load Protector in the
Compressor outside.
On the other hand, because the Compressor consists of
1/1000mm processing precision components and is sealed after
producing without dust or humidity, deal and repair with care.
Note to use
(1) Be careful not to allow over voltage and over current.
(2) No strike
(1) Be careful not to allow over voltage and over current.
(2) No strike
If applying forcible power or strike (dropping or careless
dealing), poor operation and noise may occur.
dealing), poor operation and noise may occur.
(3) Use proper electric components appropriate to the
compressor.
(4) Note to Keep Compressor.
If Compressor gets wet in the rain and rust in the pin of
Hermetic Terminal, poor operation and poor contact
may cause.
Hermetic Terminal, poor operation and poor contact
may cause.
(5) Be careful that dust, humidity, and flux due to welding
don't inflow in Compressor inside in replacing
Compressor. Dust, humidity, and flux due to welding
which inflows to Cylinder may cause lock and noise.
Compressor. Dust, humidity, and flux due to welding
which inflows to Cylinder may cause lock and noise.
4. ADJUSTMENT
- 7 -
LAMP
Figure 13
DEFROST THERMOSTAT
TIE WRAP
Figure 12
2. PARTS IDENTIFICATION
- 5 -
Freezer Door Rack
Freezer Shelf
Freezer Compartment
Temperature Control Dial
Ice Tray
Refrigerator Lamp
Refrigerator Compartment
Temperature Control Dial
Refrigerator shelves
Vegetable Drawer:
This drawer is to keep
fruits and vegetables,etc.
fresh and crisp.
Egg Storage Rack
Refrigerator Door Rack
Leveling Screw
NOTE : This is a basic model. The shape of refrigerator is subject to change.
AIR RECHARGING IN COMPRESSOR
Test the refrigeration system connecting it electrically before
refilling operation. It is necessary to ascertain the function
of the motor-compressor and identify the defects
immediately. If defects have been found, empty the old
system of possible R-134a 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 complete extension with male Hansen and
at last, solder it to the same tube again. (Figure 2)
refilling operation. It is necessary to ascertain the function
of the motor-compressor and identify the defects
immediately. If defects have been found, empty the old
system of possible R-134a 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 complete extension with male Hansen and
at 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 the heating the of 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)
valve open so that the fumes caused by oil residue can
come out freely without blowholes between two tubes
during the heating the of 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 3)
In case that a considerable leakage occurs it will be
necessary to stop the vacuum pump and to add asmall
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
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 3)
In case that a considerable leakage occurs it will be
necessary to stop the vacuum pump and to add asmall
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-134a to the refrigeration system. Remember that every
system has an exact quantity of R-134a with a tolerance of
±5 grams that can be added. (Figure 4)
R-134a to the refrigeration system. Remember that every
system 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 and
refilling cylinder are connected), make sure that the valve
placed between the vacuum pump and the refilling tube are
closed in order to keep the Freon for addition to the system.
(Figure 5)
refilling cylinder are connected), make sure that the valve
placed between the vacuum pump and the refilling tube are
closed in order to keep the Freon for addition to the system.
(Figure 5)
In addition, check the graduated scale on the cylinder for
the quantity of R-134a to be added, for example, if we
have 750 grams of Freon in the cylinder and must add 140
grams to the group, this amount will be reached when
R-134a has dropped to 610 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-134a 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 the 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 lowering the pressure again. Regulate
the valve again, maintaining the same manner until
reaching to the quantity of R-134a established for the
system being charged. When the system is running, the
suction pressure must be stabilized between 0.30 to
0.6(0.10 to 0.4) atmosphere.
the quantity of R-134a to be added, for example, if we
have 750 grams of Freon in the cylinder and must add 140
grams to the group, this amount will be reached when
R-134a has dropped to 610 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-134a 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 the 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 lowering the pressure again. Regulate
the valve again, maintaining the same manner until
reaching to the quantity of R-134a established for the
system being charged. When the system is running, the
suction pressure must be stabilized between 0.30 to
0.6(0.10 to 0.4) atmosphere.
SERVICING PRECAUTIONS
- 3 -
POINT TO BE BROKEN
SERVICE TUBE EXTENSION
CHARGE TUBE
EXTENSION
EXTENSION
FEMALE
HANSEN
HANSEN
MALE HANSEN
SOLDERING POINT
Figure 1
Figure 2
TO THE
VACUUM
PUMP
VACUUM
PUMP
PRESSURE
GAUGE
GAUGE
Figure 3
TO THE R-134a CYLINDER
TO THE REFRIGERATION
SYSTEM
SYSTEM
Figure 4
FILLING OR
CHARGE TUBE
CHARGE TUBE
VALVE TO BE OPENED
WHEN REFILLING
WHEN REFILLING
VALVE TO BE CLOSED
AFTER VACUUM
AFTER VACUUM
TO THE CHARGE
CYLINDER
CYLINDER
TO THE REFRIGERATION
SYSTEM
SYSTEM
TO THE
VACUUM
PUMP
VACUUM
PUMP
Figure 5