LG gr-392 User manual

CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY
PRECAUTIONS" IN THIS MANUAL.
MODEL: GR-392

SAFETY PRECAUTIONS ....................................................................................................................................................... 2
SERVICING PRECAUTIONS.................................................................................................................................................. 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ....................................................................................................................................................... 5
DISASSEMBLY.................................................................................................................................................................... 6-7
DOOR................................................................................................................................................................................... 6
DOOR SWITCH.................................................................................................................................................................... 6
THERMOSTAT ..................................................................................................................................................................... 6
FAN AND FAN MOTOR........................................................................................................................................................ 6
DEF' CONTROL ASM .......................................................................................................................................................... 7
LAMP.................................................................................................................................................................................... 7
DAMPER CONTROL............................................................................................................................................................ 7
ADJUSTMENT..................................................................................................................................................................... 8-9
COMPRESSOR.................................................................................................................................................................... 8
PTC-STARTER..................................................................................................................................................................... 8
OLP (OVER LOAD PROTECTOR) ...................................................................................................................................... 9
CIRCUIT DIAGRAM................................................................................................................................................................ 9
TROUBLESHOOTING..................................................................................................................................................... 10-15
COMPRESSOR AND ELECTRIC COMPONENTS ........................................................................................................... 10
PTC AND OLP.................................................................................................................................................................... 11
DEFROST TIMER .............................................................................................................................................................. 11
ANOTHER ELECTRIC COMPONENT............................................................................................................................... 12
SERVICE DIAGNOSIS CHART.......................................................................................................................................... 13
REFRIGERATING CYCLE ............................................................................................................................................ 14-15
EXPLODED VIEW ........................................................................................................................................................... 16-17
REPLACEMENT PARTS LIST ........................................................................................................................................ 18-35
Please read the followings before servicing your refrigerator.
1. Check if an electric leakage occurs in the set.
2. To prevent electric shock, unplug prior to servicing.
3. In case of testing with power on, wear rubber gloves to
prevent electric shock.
4. If you use any appliances, check regular current, voltage
and capacity.
5. Don't touch metal products in cold freezer with wet hand.
It may cause frostbite.
6. Prevent water flowing to electric elements in mechanical
parts.
7. When you stand up during observing the lower part
with the upper door open, move with care to prevent
head wound which may happen by hitting the upper
door.
8. When sloping the set, remove any materials on the set,
especially thin plate type (ex.: glass shelf or books.)
9. When servicing evaporator part, wear cotton gloves
without fail. It is to prevent wound by sharp fin of
evaporator.
10. Leave a breakage of refrigerating cycle to a heavy
service center. The gas in cycle inside may soil
ambient air.
SAFETY PRECAUTIONS
CONTENTS
- 2 -

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 the defects have been found, empty the old
system of eventual R-12(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 so 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 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(R134a) to the refrigerant system. Remember that
every system has an exact quantity of R-12(R134a) 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 refilling tube are
closed to keep the Freon for adding to the system. (Figure 5)
In addition, check the graduated scale on the cylinder for
the quantity of R-12(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
R-12(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 R-12(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 to the quantity of R-12(R134a) 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.
POINT TO BE BROKEN
SERVICE TUBE EXTENSION
CHARGE TUBE
EXTENSION
FEMALE
HANSEN
MALE HANSEN
SOLDERING POINT
Figure 1 Figure 2
TO THE
VACUUM
PUMP
PRESSURE
GAUGE
Figure 3
TO THE R-12(R134a) CYLINDER
TO THE REFRIGERATION
SYSTEM
Figure 4
FILLING OR
CHARGE TUBE
VALVE TO BE OPENED
WHEN REFILLING
VALVE TO BE CLOSED
AFTER VACUUM
TO THE CHARGE
CYLINDER
TO THE REFRIGERATION
SYSTEM
TO THE
VACUUM
PUMP
Figure 5
SERVICING PRECAUTIONS
- 3 -

1. SPECIFICATIONS
- 4 -
ITEMS SPECIFICATIONS
FREEZER 86 L
REFRIGERATOR 241 L
TOTAL 327 L
DIMENSIONS (mm) 725(W)
X 632(D) X 1684(H)
NET WEIGHT (kg) 68
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Knob Dial
Full Automatic
DEFROSTING SYSTEM Heater Defrost
With a Timer
OUT CASE Coated Steel Sheet
INNER CASE ABS Resin
(§⁄)
NET
CAPACITY
INSULATION Polyurethane Foam
ITEMS SPECIFICATIONS
FREEZER 1 EA
REFRIGERATOR 2 EA
VEGETABLE TRAY Transparent Drawer Type
EGG TRAY 2 EA
ICE TRAY 2 EA
ICE BANK 1 EA
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Pipe on Sheet Type
REFRIGERANT R-12 (195g)
LUBRICATING OIL HTS-95 (330cc)
DEFROSTING DEVICE Heater
FREE CORNER Have
QUICK FREEZER Have
SHELF
1-1. GR-392C/CV/S/SV
ITEMS SPECIFICATIONS
FREEZER 86 L
REFRIGERATOR 241 L
TOTAL 327 L
DIMENSIONS (mm) 725(W)
X 632(D) X 1684(H)
NET WEIGHT (kg) 68
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Knob Dial
Full Automatic
DEFROSTING SYSTEM Heater Defrost
With a Timer
OUT CASE Coated Steel Sheet
INNER CASE ABS Resin
(§⁄)
NET
CAPACITY
INSULATION Polyurethane Foam
ITEMS SPECIFICATIONS
FREEZER 1 EA
REFRIGERATOR 2 EA
VEGETABLE TRAY Transparent Drawer Type
EGG TRAY 2 EA
ICE TRAY 2 EA
ICE BANK 1 EA
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Pipe on Sheet Type
REFRIGERANT R-134a (140g)
LUBRICATING OIL FREOL¥Æ
22G(390cc)
DEFROSTING DEVICE Heater
FREE CORNER Have
QUICK FREEZER Have
SHELF
1-2. GR-392SF/SVF

FREEZER TEMP.
CONTROL KNOB
ICE TRAY
ICE BANK
REFRIGERATOR
TEMP. CONTROL
KNOB
SHELVES
COVER VEGETABLE
TRAY
VEGETABLE TRAY

COVER LOWER

ADJUSTABLE FEET

BOTTLE RACK

MULTI DUCT-R
EGG TRAY
BASKET OF
FREEZER
QUICK FREEZING
CORNER
NOTE : This is a basic model. The shape of refrigerator is subject to change.
2. PARTS IDENTIFICATION
- 5 -

3-1 DOOR
● Freezer Door
1. Remove the hinge cover by pulling it upwards
2. Loosen 3 hexagonal bolts fixing the upper hinge to the
body and lift the freezer door.
3. Loosen the screws inside the door gasket to remove the
door gasket and the door liner.
●Refrigerator Door
1. Loosen 4 hexagonal bolts fixing the lower hinge to the
body to remove the refrigerator door only.
2. Loosen the screws inside the door gasket to remove the
door liner and the door gasket.
3-2 DOOR SWITCH
1. To remove the door switch, pull out it with a 'Ñ' type
driver as shown in (Figure 9).
2. Disconnect the lead wire from the switch.
3-3 THERMOSTAT
1. Loosen 2 screws fixing the control box assembly to the
body.
2. Remove the thermostat knob and the thermostat from
the control box.
3-4 FAN AND FAN MOTOR
1. After taking out the control box, remove the grill fan by
leaning the hook upwards with a 'Ñ' type driver and
pulling it out.
BOLT
HINGE COVER
HINGE
Figure 6
GASKET
DOOR LINER
Figure 7
LOWER HINGE
BOLT
Figure 8
DOOR SWITCH
LEAD WIRE
Figure 9
THERMOSTAT
CONTROL BOX
THERMOSTAT
KNOB
SCREW
Figure 10
HOOK
GRILL FAN
Figure 11
3. DISASSEMBLY
- 6 -

2. Pull out the shroud assembly.
3. Loosen 2 screws holding fan motor bracket to remove
the fan and fan motor assembly.
3-5 DEF' CONTROL ASM
Def control ASM consists of Defrost Thermostat and FUSEÐM.
Defrost Thermostat functions to defrost automatically and it
is attached to the Evaporator and the metal side of the
case senses Temp.
Fuse-M is a kind of safety device for preventing over-
heating of the Heater when defrosting.
At the temperature of 77¡C, it stops the emission of TEMP
from the Defrost Heater.
1. After removing the Control Box, and Fan Grill loosen 2
screw and pull out the Shroud with it pulling with your
hand. (Figure 13)
2. Separate the 2 connectors connected with the Def
Control ASM and replace the Def Control ASM after
cutting the Tie Wrap and removing the Holder Fuse.
(Figure 14)
3-6 LAMP
3-6-1 Freezer
1. Remove all shelves in the freezer.
2. To remove the lamp cover, insert a 'Ñ' type driver in the
lower gap and pull out it as shown in (Figure 15).
3. Turn the lamp counterclockwise.
3-6-2 Refrigerator
1. Remove all shelves in the refrigerator.
2. Insert your hand in the lower aperture of the Lamp
Cover and remove it by pulling forward as shown in
(Figure 16).
3. Turn the lamp counterclockwise.
3-7 DAMPER CONTROL
1. Remove the control knob by pulling it out.
2. After removing the Lamp cover, loosen 2 screws fixing
the Damper control ASM to the body.
3. Remove the Damper control ASM and separate the
Damper and the Control box.
Figure 15 Figure 16
SHROUD-F
HOLDERS
FAN DEF-THERMO
FUSE-M
HOLDER FUSE
Figure 13 Figure 14
SHROUD
FAN
FAN MOTOR

FAN MOTOR
BRACKET
Figure 12
DAMPER
CONTROL BOX
KNOB
LAMP COVER
Figure 17
- 7 -

4-1 COMPRESSOR
4-1-1 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.
4-1-2 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.
4-1-3 Note to Use
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.
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.
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.
4-2 PTC-STARTER
4-2-1 Composition of PTC-Starter
1. PTC (Positive Temperature Coefficient) is no-contact
semiconductor starting device which uses ceramic
material and the material consists of BaTiO3.
2. The higher the temperature is, the higher resistance
value becomes . These features are used as starting
device of Motor.
4-2-2 Role of PTC-Starter
1. PTC is attached to Hermetic Compressor used for
Refrigerator, show case and starts Motor.
2. Compressor for household refrigerator applies single
phase induction Motor.
For normal operation of single-phase induction motor, in
the starting operation flows in both main coil and sub
coil. After the starting is over, the current is cut off in sub
coil. The proper features of PTC play the above all roles.
So, PTC is used as a starting device of motor.
4-2-3 PTC-Applied Circuit Diagram
According to Starting Method of Motor
4-2-4 Motor Restarting and PTC Cooling
1. For restarting after power off during normal Compressor
Motor operation, plug the power cord after 5 min. for
pressure balance of Refrigerating Cycle and PTC
cooling.
2. During normal operation of Compressor Motor, PTC
elements generate heat continuously. Therefore,
if PTC isn't cooled for a while after power off, Motor can't
operate again.
4-2-5 Relation of PTC-Starter and OLP
1. If power off during operation of Compressor and power
on before PTC is cooled, (instant shut-off within 2 min.
or reconnect a power plug due to misconnecting),
PTC isn't cooled and a resistance value grows. As a
result, current can't flow to the sub-coil and Motor can't
operate and OLP operates by flowing over current in
only main-coil.
2. While the OLP repeats on and off operation about 3-5
times, PTC is cooled and Compressor Motor performs
normal operation.
If OLP doesn't operate when PTC is not cooled,
Compressor Motor is worn away and causes circuit-
short and fire. Therefore, use a proper fixed OLP without
fail.
4-2-6 Note to Use PTC-Starter
1. Be careful to over voltage and over current.
2. No Strike
Don't apply a forcible power or strike.
3. Keep apart from any liquid.
If liquid such as oil or water inflows into PTC,
PTC materials may break due to insulation breakdown
of material itself.
4. Don't change PTC at your convenience.
Don't disassemble PTC and mold. If damaging to
outside of PTC-Starter, resistance value alters and poor
starting of compressor motor may cause.
5. Use a properly fixed PTC.
OVERLOAD PROTECTOR-
PTC-5-
6-
C-
S-
M-
S-M-
MOTOR-
HERMETIC-
TERMINAL-
PTC STARTER-
RSIR-
COMPRESSOR-
3-
Figure 18
4. ADJUSTMENT
- 8 -

4-3. OLP (OVER LOAD PROTECTOR)
4-3-1 Definition of OLP
4. OLP (OVER LOAD PROTECTOR) is attached to
Hermetic Compressor and protects Motor by cutting off
current in Compressor Motor by Bimetal in the OLP in
case of over-rising temperature.
2. When over voltage flows to Compressor motor, Bimetal
works by heating the heater inside OLP,
and OLP protects Motor by cutting off current which
flows to Compressor Motor.
4-3-2 Role of OLP
1. OLP is attached to Hermetic Compressor used to
Refrigerator and Show Case and prevents Motor Coil
from being started in the Compressor.
2. Do not turn the Adjust Screw of OLP in any way for
normal operation of OLP.
(Composition and connection Diagram of OLP)
5. CIRCUIT DIAGRAM
CONTACTING-
POINT-
HEATER-
TERMINALS-
BIMETAL-
COVER-
CONTACTION-
POINT-
ADJUST-
SCREW-BIMETAL-
HEATER-
Figure 19
NOTE : 1. This is a basic diagram and specifications vary in different localities.
- 9 -

6-1 COMPRESSOR AND ELECTRIC COMPONENTS
6. TROUBLESHOOTING
- 10 -
1-
-
2-
3-
4-
5-
2-
5-
5-
3-
5-
4-
5-
5-
1-
-
4-3-
YES-
YES-
YES-
YES-
NO-
NO-
YES-
YES-
YES-
NO-
NO-
NO-
Power Source.
No Voltage.
(Rating Voltage
±10%)?
Replace OLP.
Reconnect.
Replace
PTC-Starter.
Replace OLP.
O.K.
Check connection
condition.
OLP disconnected?
Advise the customer
to use a regular
TRANS.
Replace Compressor.
OLP works within
30 sec. in forcible OLP
operation by turning
instant power on and
off.
Components start in
the voltage of Rating
Voltage ±10%
below.
Applied voltage isn't
in the range of Rating
Voltage ±10%.
Remove the PTC-
Starter from the
Compressor and
measure the voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
Check the resistance
among M-C, S-C and
M-S in Motor
Compressor.
Check the resistance
of two terminals in
PTC-Starter.
Check if applying
a regular OLP.
Measure minimum
starting voltage after 5
min. for balancing cycle
pressure and cooling the
PTC.
Check the
resistance of
Motor
Compressor.
Check the
resistance of
PTC-Starter.
Check OLP.
Check
starting state.

6-2 PTC AND OLP
- 11 -
6-5-
YES-
NO-
NO-
YES-
NO-
Cam Shaft-
Normal operation of
Compressor is
impossible or poor.
Separate the PTC-
Starter from
Compressor and
measure the
resistance between
No. 5 and 6 of PTC-
Starter with a Tester or
Whistone Bridge.
(Figure 21)
Separate the OLP from
Compressor and check
the resistance value
between two terminals
of OLP with a Tester.
(Figure 22)
Observation value is
220V/50Hz : 22§±30%
115V/60Hz : 6.8§±30%
240V/50Hz : 33§±30%
127, 220V/60Hz : 22§
±30%
The resistance value
is 0 or several
hundreds §.
The value is ¡˜.
Check another
electric components.
Replace OLP.
Check another
electric components.
Replace PTC-
Starter
Figure 21 Figure 22
Figure 23
Normal operation of
the Defrost Timer is
impossible.
No defrosting.
Poor cooling.
Position the Cam Shaft to
the point of first 'click'
sound and check the
current flowing between
terminals No. 1(brown)
and No. 2(bright orange).
Next, position the Cam
Shaft to the point of
second "click" sound and
check the current flowing
between terminals
No. 1(brown) and
No. 4(black)
(Figure 23).
Turn the Cam Shaft.
Shake about 3 times
with holding the Cam
Shaft and Body softly.
The resistance is ¡˜
The resistance is
0§or variable.
The resistance is about
220V/50Hz : 20K§
115V/60Hz : 7.8K§.
Loud 'click' sound.
Replace the
Defrost Timer.
Replace the
Defrost Timer.
Replace the
Defrost Timer.
Check the another
electric components.
Replace the
Defrost Timer.
6-3 DEFROST TIMER

6-4 ANOTHER ELECTRIC COMPONENTS
- 12 -
▼Cooling is impossible
Compressor
doesn't run.
Running state of
Compressor is poor.
Check a starting
voltage.
Check if current flows to
the following
components.
a. Thermostat
b. Starting devices
c. OLP
d. Compressor coil
e. Defrost Timer
f. Circuit parts
Low voltage.
Poor contacting and
gas leakage.
Shorted or broken.
Poor contacting
or shorted.
Coil shorted.
Poor contacting
or shorted.
Poor contacting
and broken.
Shorted.
Lack of capacity.
Coil of motor
Compressor.
Replace
the compressor.
Replace
each component.
Raise the voltage.
Replace
each component.
Cause
Check if current flows
to starting devices.
Check current flowing
in sub-coil of
Compressor.
Check capacity of OLP.
The items described
above are normal.
▼ Cooling ability is poor
Fan motor
doesn't run.
Much frost are sticked
to the EVAPORATOR.
Poor contacting.
Coil is shorted.
Shorted.
Replace
each component.
Replace
each component.
Replace
each component.
Running is poor.
(Coil is shorted.)
Check current flowing
of the door S/W.
Check current flowing
in the Fan Motor.
Check the running
condition of Timer.
Check current flowing
of the following
components.
¥ Defrost Thermostat
¥ Fuse-M
Check current flowing
of the following
components.
¥ L-cord
¥ TE-Plate Heater

6-5 SERVICE DIAGNOSIS CHART
COMPLAINT POINTS TO BE CHECKED REMEDY
Cooling is ¥ Is the power cord unplugged from the outlet? ¥ Plug to the outlet.
impossible. ¥ Check if the power S/W is setted to OFF. ¥ Set the switch to ON.
¥ Check if the fuse of power S/W is shorted. ¥ Replace a regular fuse.
¥ Measure the voltage of power outlet. ¥ If voltage is low, wire newly.
Cooling ability ¥ Check if the set is placed close to wall. ¥ Place the set with the space of about 10cm.
is poor. ¥ Check if the set is placed close to stove, gas ¥ Place the set apart from these heat
¥ cooker and direct rays. ¥ appliances.
¥ Is the ambient temperature high or ¥ Make the ambient temperature below.
¥ the room door closed?
¥ Check if putting in hot foods. ¥ Put in foods after they get cold.
¥ Did you open the door of the set too often ¥ Don't open the door too often and closed
¥ or check if the door is closed up? ¥ it firmly.
¥ Check if the Thermostat is set to "WARM (1)". ¥ Set the knob to "MID (2)".
Foods in the ¥ Are foods placed in cooling air outlet? ¥ Place foods in high temperature section.
Refrigerator ¥ (Front Part)
are frozen. ¥ Check if the Thermostat is set to "COLD (3)". ¥ Set the knob to "MID (2)".
¥ Is the ambient temperature within 5¡C? ¥ Set the knob to "WARM (1)".
Dew or ice ¥ Is watery foods kept? ¥ Seal up watery foods with wrap.
forms in the ¥ Check if putting in hot foods. ¥ Put in foods after they get cold.
chamber of ¥ Did you open the door of the set too ¥ Don't open the door too often and close
the set. ¥ often or check if the door is closed up. ¥ it firmly.
Dew forms ¥ Check if ambient temperature and humidity ¥ Wipe dew with a dry cloth. This happening
in the out Case. ¥ are high. ¥ is solved in low temperature and humidity
¥ Is the gap in the door packing? ¥ naturally.
¥ Fill up the gap.
Abnormal ¥ Is the set positioned in a firm and even place? ¥ Adjust the Adjust Screw, and position
noise generates. ¥ in the firm place.
¥ Does any unnecessary objects exist ¥ Remove the objects.
¥ in the back side of the set?
¥ Check if the Drip Tray is omitted. ¥ Place it on an original position.
¥ Check if the cover of mechanical room ¥ Place the cover at an original position.
¥ in below and front side is taken out.
To close the door ¥ Check if the door packing becomes dirty ¥ Clean the door packing.
is not handy. ¥ by filth such as juice.
¥ Is the set positioned in a firm and even place? ¥ Position in the firm place and adjust the
¥ Are too much foods putted in the set? ¥ Adjust Screw.
¥ Keep foods not to reach to the door.
Ice and foods ¥ Check if the inside of the set becomes dirty. ¥ Clean the inside of the set.
smell unpleasant. ¥ Did you keep smelly foods without wraping? ¥ Wrap smelly foods.
¥ It smells plastic. ¥ The new products smell plastic, but it is
¥ removed after 1-2 weeks.
- 13 -

6-6 REFRIGERATING CYCLE
▼Troubleshooting Chart
▼Leakage Detection
●Observe discharging point of refrigerant which may be in oil discharging part in compressor and hole of evaporator.
- 14 -
YES-
YES-
Whether Compressor
runs or not.
Whether frost
forms or not in
Evaporator.
Observe the discharging
amount of Refrigerant.
Inject Refrigerant to Compressor
and check cooling operation.
Clogged by dust. Gas leakage.
Faulty
Compressor.
Moisture Clog.
Whether oil leaks or not.
Normal formed frost
Normal amount
No or much amount
(Check the leakage point)
Normal formed
frost in Evaporator
No frost
or forms
in inlet only
Check Compressor
PARTIAL Freezer room and Low flowing sound of A little high ¥ A little Refrigerant
LEAKAGE Refrigerator Refrigerant is heard and more than ¥ discharges.
don't get cold frost forms in inlet only ambient ¥ Normal cooling is possible
normally. temperature. ¥ when injecting Refrigerant
¥ of regular amount.
WHOLE Freezer room and Flowing sound of Refrigerant Equal to ambient ¥ No discharging of Refrigerant.
LEAKAGE Refrigerator is not heard and frost isn't temperature. ¥ Normal cooling is possible
don't get cold formed. ¥ when injecting Refrigerant
nornally. ¥ of regular amount.
PARTIAL Freeze room and Flowing sound of Refrigerant A little high ¥ Normal discharging of
CLOG Refrigerator is heard and frost forms more than ¥ refrigerant.
don't get cold in inlet only. ambient ¥ The capillary tube is faulty.
normally. temperature.
WHOLE Freezer room and Flowing sound of Refrigerant Equal to ambient ¥ Normal discharging of
CLOG Refrigerator is not heard and frost isn't temperature. ¥ Refrigerant.
don't get cold. formed.
MOISTURE Cooling operation Flowing sound of Refrigerant Low than ¥ Cooling operation restarts
CLOG stops periodically. is not heard and frost melts. ambient ¥ when heating the inlet of
temperature ¥ capillary tube.
COMP- Freezer room and Low flowing sound of A little high ¥ The pressure of high
RESSION Refrigerator Refrigerant is heard and than ambient ¥ pressure part in
don't get cold. frost forms in inlet only. temperature. ¥ compressor is low.
NO COMP- No compressing Flowing sound of Refrigerant Equal to ambient ¥ No pressure of high pressure
RESSION operation. is not heard and no frost. temperature. ¥ part in compressor.
CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE SET
STATE OF THE
EVAPORATOR
LEAKAGE
CLOGGED BY DUST
DEFECTIVE
COMPRESSION

NO. ITEMS CONTENTS AND SPECIFICATIONS REMARKS
WELDING (1) H 30
ROD (1) ¥ Chemical Ingredients ¥ Recommend H34 containing 34% Ag in the
(1) ¥ Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% ¥ Service Center.
(1) ¥ Brazing Temperature: 710~840¡C
(2) Bcup-2
(1) ¥ Chemical Ingredients
(1) ¥ Cu: About 93%
(1) ¥ P: 6.8~7.5%
(1) ¥ The rest: within 0.2%
(1) ¥ Brazing Temperature: 735~840¡C
FLUX (1) ¥ Ingredients and how to make ¥ Make amount for only a day. (1)
(1) ¥¥Borax 30% ¥ Holding period: 1 day
(1) ¥¥Borax 35% ¥ Close the cover of container to prevent dust
(1) ¥ Fluoridation kalium: 35% ¥ putting in the FLUX.
(1) ¥ Water: 4% ¥ Keep it in a stainless steel container.
(1) ¥ Mix the above ingredients and boil until
(1) ¥ they are transformed into liquid.
DRIER (1) Assemble the drier within 30min. ¥ Don't keep the drier in a outdoor because
ASM (1) after unpacking. ¥ humidity damages to it.
(2) Keep the unpacked drier at the temperature
of 80~100¡C.
VACUUM (1) When measuring with pirant Vacuum ¥ Apply M/C Vacuum Gauge without fail.
(1 )gauge of charging M/C, vacuum ¥ Perform vacuum operation until a proper
(1 )degree is within 1 Torr. ¥ vacuum degree is built up.
(2) If the vacuum degree of the cycle inside is ¥ If a proper vacuum degree isn't built up,¥
(2) 10 Torr. below for low pressure and 20 Torr. ¥ check the leakage from
(2) for high pressure, it says no vacuum ¥ the Cycle Pipe line part and
(2) leakage state. ¥ Quick Coupler Connecting part.
(3) Vacuum degree of vacuum pump must be
(3) 0.05 Torr. below after 5 min.
(4) Vacuum degree must be same to the
value described item (2) above for more than
20 min.
(1) The pressure of dry air must be more
han 12~16Kg/cm2
(2) Temperature must be more than
-20~-70¡C.
(3) Keep the pressure to 12~6Kg/cm2also
(3) when substituting dry air for Nitrogen Gas.
NIPPLE (1) Check if gas leaks with soapy water. ¥ Check if gas leaks from connecting part of
AND (2) Replace Quick Coupler in case of leakage. ¥ Coupler.
COUPLER
PIPE (1)¥ Put all Joint Pipe in a clean box and
(1)¥ cover tightly with the lid so that dust or
(1)¥ humidity is not inserted.
1
2
3
4
5
6
7
DRY AIR
AND
NITROGEN
GAS
▼General Control of Refrigerating Cycle
- 15 -

7. EXPLODED VIEW
- 16 -
318A
317A
328A
327A
314A
307A
308A
310A
309A
312A
315A
326A
325A
323A
104B
104C
103C
120D
120B
319A
104B
283B
120C
120A
406B
125A
110C
110B
110A
129A
281B
281A
103B
103A
304A
145F
409B
604E
604F
105A
411A
410G
416A
416B
410F
410B
410A
410C
406B
282G
282B
410H
103D
409C
407A
311A
282H
▼The parts of refrigerator and the shape of each part are subject to change in different localities or model name.

- 17 -
241C
243A
241D
151B
151A
155J
155H
155A
149B
205A
205A
145B
145A
149A
330B 332A
301A
405C
404A
405C 405A
409B
330C
205A
203A 202A
201A
205A
128B
127A
233A 232A
231A
329A
418A
155J
155H
210A
210B
155B
136A
136B
131A
131C
401A
235A
212G
303A
403A
303B
200A
230A

P/NO. 3828JD8109D MAR., 1998 Printed in Korea