LG LDN22735SW User manual

CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
REFRIGERATOR
SERVICE MANUAL
MODELS: LDN22735SW/ SB/ ST

CONTENTS
- 2 -
Please read the following instructions before servicing your
refrigerator.
1. Check the refrigerator for current leakage.
2. To prevent electric shock, unplug before servicing.
3. Always check line voltage and amperage.
4. Use standard electrical components.
5. Don't touch metal products in the freezer with wet
hands. This may cause frostbite.
6. Prevent water from spiling onto electric elements or the
machine parts.
7. Before tilting the refrigerator, remove all materials from
on or in the refrigerator.
8. When servicing the evaporato,r wear gloves to prevent
injuries from the sharp evaporator fins.
9. Service on the refrigerator should be performed by a
qualified technician. Sealed system repair must be
performed by a CFC certified technician.
SAFETY PRECAUTIONS
S a f e t y P r e c a u t io n s … … … … … … … … … … … … … … … … … … … … . 2
1 . S p e c if ic a t io n s … … … … … … … … … … … … … … … … … … … … … … .. 3
2 . P a r t s Id e n t if ic a tio n … … … … … … … … … … … … … … … … … … … … . 4
3 . D is a s s e m b ly … … … … … … … … … … … … … … … … … … … … … … … . 6
4 . A ju s t m e n t … … … … … … … … … … … … … … … … … … … … … … … … .. 8
5 . C ir c u it D ia g r a m … … … … … … … … … … … … … … … … … … … … … .. 1 0
6 . T r o u b le s h o o t in g … … … … … … … … … … … … … … … … … … … … … . 1 1
C o m p r e s s o r & E le c tr ic C o m p o n e n ts … … … … … … … … … … … … … 1 1
P T C & O L P … … … … … … … … … … … … … … … … … … … … … … … .. 1 2
O th e r E le c tr ic a l C o m p o n e n ts … … … … … … … … … … … … … … … … 1 3
S e r v ic e D ia g n o s is C h a r t… … … … … … … … … … … … … … … … … … . 1 4
R e fr ig e r a tio n C y c le … … … … … … … … … … … … … … … … … … … … .. 1 5
7. D e s c r ip t io n O f F u n c t io n &C ir c u it O f M IC O M . . . . . . . . . . . . . . . . . . . . . . . 1 6
8 .R e f r ig e r a t o r E x p lo d e d V ie w&S e r v ic e P a r t s L is t … … … … . . . . . . . . 3 6

1. SPECIFICATIONS
- 3 -
ITEMS SPECIFICATIONS
DOOR DESIGN Side Rounded
DIMENSIONS (inches)
32 7/8X 31 3/4X 68 1/2(WXDXH) 22cu.ft
NET WEIGHT (pounds)
246.9 ( 22cu.ft)
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
Full Automatic
DEFROSTING SYSTEM
Heater Defrost
DOOR FINISH Embossed Metal, VCM, Stainless
HANDLE TYPE Bar, Al
INNER CASE ABS Resin
INSULATION Polyurethane Foam
ITEMS SPECIFICATIONS
VEGETABLE TRAY Opaque Drawer Type
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R-134a (115 g)
LUBRICATING OIL Freol @ 10G (310 cc)
DEFROSTING DEVICE SHEATH HEATER
LAMP
REFRIGERATOR 60 W (2EA)
FREEZER 60 W (2EA)
22 cu. ft.

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
Digital Sensor Control
Refrigerator Light
Shelves
Chef Fresh / Snack Pan*
Can Dispenser*
Optibin Crisper
Keeps fruits and vegetable fresh and crisper
Customcube Icemaker
Ice Bin
Durabase
Divider
Filter (inside)*
Dairy Bin
Design-A-Door
Egg Box
Refrigerator Door Rack
Freezer Light
Wire Basket
Freezer Door Rack (Tilting*)
*on some models
B
C
D
A
F
E
NOTE:This guide covers several different models.The refrigerator you have purchased may have some
or all of the items listed below.The locations of the features shown below may not match your model.
G
H
I
J
K
M
N
L
O
P
Q
R
PARTSANDFEATURES
2. PARTS IDENTIFICATION
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A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
Digital Sensor Control
Refrigerator Light
Shelves
Chef Fresh / Snack Pan*
Can Dispenser*
Optibin Crisper
Keeps fruits and vegetable fresh and crisper
Triple Ice Tray
Ice Bin
Durabase
Divider
Filter (inside)*
Dairy Bin
Design-A-Door
Egg Box
Refrigerator Door Rack
Freezer Light
Wire Basket
Freezer Door Rack (Tilting*)
*on some models
B
C
D
A
F
E
NOTE:This guide covers several different models.The refrigerator you have purchased may have some
or all of the items listed below.The locations of the features shown below may not match your model.
G
H
I
J
K
M
N
L
O
P
Q
R
PARTSANDFEATURES
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3-1 DOOR
Refrigerator Door
1. Remove the hinge cover by pulling it upwards.
2. Loosen the hexagonal bolts attaching the upper hinge to
the body and lift the freezer door.
3. Pull out the door gasket to remove from the door foam
assembly.
Freezer Door
1. Loosen the hexagonal bolts attaching the lower hinge to
the body to remove the refrigerator door only.
2. Pull out the door gasket to remove from the door foam
assembly.
3-2 DOOR SWITCH
1. To remove the door switch, pry it out with a slotted-type
driver, as shown in (Figure 4).
2. Disconnect the lead wire from the switch.
3. DISASSEMBLY
- 6 -
BOLT
HINGE
HINGE COVER
Figure 1
GASKET
Figure 2
LOWER HINGE
BOLT
Figure 3
DOOR SWITCH
LEAD WIRE
Figure 4

3-3 FAN AND FAN MOTOR
1. Remove the freezer shelf. (If your refrigerator has an
icemaker, remove the icemaker first)
2. Remove the grille by pulling it out and by loosening a
screw.
3. Remove the Fan Motor assembly by loosening 2 screws
and disassemble the shroud.
4. Pull out the fan and separate the Fan Motor and Bracket.
3-4 DEFROST CONTROL ASSEMBLY
Defrost Control assembly consists of Defrost Sensor and
FUSE–M.
The Defrost Sensor works to defrost automatically. It is
attached to the metal side of the Evaporator and senses its
temperature. At 72°C, it turns the Defrost Heater off.
Fuse-M is a safety device for preventing over-heating of
the Heater when defrosting.
1. Pull out the grille assembly. (Figure 6)
2. Separate the connector with the Defrost Control
assembly and replace the Defrost Control assembly
after cutting the Tie Wrap. (Figure 7)
3-5 LAMP
3-5-1 Refrigerator Compartment Lamp
1. Unplug the power cord from the outlet.
2. Remove refrigerator shelves.
3. Release the hooks on both ends of the lamp shield and
pull the shield downward to remove it.
4. Turn the lamp counterclockwise.
5. Assemble in reverse order of disassembly. Replacement
bulb must be the same specification as the original
(Max. 60 W-2EA).
3-5-2 Freezer Compartment Lamp
1. Unplug refrigerator or disconnect power.
2. Reach behind light shield to remove bulb.
3. Replace bulb with a 60-watt appliance bulb.
4. Plug in refrigerator or reconnect power.
3-6 CONTROL BOX-REFRIGERATOR
1. First, remove all shelves in the refrigerator, than remove
the Refrigerator control Box by loosening 2 screws.
2. Remove the Refrigerator Control Box by pulling it
downward.
3. Disconnect the lead wire on the right position and
separate the lamp sockets.
3-7 MULTI DUCT
1. Remove an upper and
lower Cap by using a flat
screwdriver, and loosen 3
screws. (Figure 11)
2. Disconnect the lead wire
on the bottom position.
- 7 -
FAN
BRACKET
MOTOR
GRILLE
FAN MOTOR
Figure 5
GRILLE ASSEMBLY
Figure 6
DEFROST-CONTROL
ASSEMBLY
Figure 7
Figure 8
Figure 9
CONTROL BOX
COVER LAMP Figure 10
Figure 11

4-1 COMPRESSOR
4-1-1 Role
The compressor intakes low temperature and low pressure
gas from the evaporator of the refrigerator and compresses
this gas to high-temperature and high-pressure gas. It then
delivers the gas to the condenser.
4-1-2 Composition
The compressor includes overload protection. The PTC
starter and OLP (overload protector) are attached to the
outside of the compressor. Since the compressor is
manufactured to tolerances of 1 micron and is hermetically
sealed in a dust and moisture-free environment, use
extreme caution when repairing it.
4-1-3 Note for Usage
(1) Be careful not to allow over-voltage and over-current.
(2) If compressor is dropped or handled carelessly, poor
operation and noise may result.
(3) Use proper electric components appropriate to the
Particular Compressor in your product.
(4) Keep Compressor dry.
If the Compressor gets wet (in the rain or a damp
environment) and rust forms in the pin of the Hermetic
Terminal, poor operation and contact may result.
(5) When replacing the Compressor, be careful that dust,
humidity, and soldering flux don’t contaminate the inside
of the compressor. Dust, humidity, and solder flux
contaminate the cylinder and may cause noise,
improper operation or even cause it to lock up.
4-2 PTC-STARTER
4-2-1 Composition of PTC-Starter
(1) PTC (Positive Temperature Coefficient) is a no-contact
semiconductor starting device which uses ceramic
material consisting of BaTiO3.
(2) The higher the temperature is, the higher the resistance
value. These features are used as a starting device for
the Motor.
4-2-2 Role of PTC-Starter
(1) The PTC is attached to the Sealed Compressor and is
used for starting the Motor.
(2) The compressor is a single-phase induction motor.
Durign the starting operation, the PTC allows current
flow to both the start winding and main winding.
4-2-3 PTC-Applied Circuit Diagram
Starting Method for the Motor
4-2-4 Motor Restarting and PTC Cooling
(1) It requires approximately 5 minutes for the pressure to
equalize before the compressor can restart.
(2) The PTC device generates heat during operation.
Therefore, it must be allowed to cool before the
compressor can restart.
4-2-5 Relation of PTC-Starter and OLP
(1) If the compressor attempts to restart before the PTC
device is cooled, the PTC device will allow current to
flow only to the main winding.
(2) The OLP will open because of the over current
condition. This same process will continue (3 to 5
times) when the compressor attempts to restart until
the PTC device has cooled. The correct OLP must be
properly attached to prevent damage to the
compressor.
Parts may appear physically identical but could have
different electrical ratings. Replace parts by part
number and model number. Using an incorrect part
could result in damage to the product, fire, injury, or
possibly death.
4-2-6 Note for Using the PTC-Starter
(1) Be careful not to allow over-voltage and over-current.
(2) Do not drop or handle carelessly.
(3) Keep away from any liquid.
If liquid such as oil or water enters the PTC,
PTC materials may fail due to breakdown of their
insulating capabilities.
(4) If the exterior of the PTC is damaged, the resistance
value may be altered. This can cause damage to the
compressor and result in a no-start or hard-to-start
condition.
(5) Always use the PTC designed for the compressor and
make sure it is properly attached to the compressor.
Parts may appear physically identical but could have
different electrical ratings. Replace parts by part
number and model number. Using an incorrect part
could result in damage to the product, fire, injury, or
possibly death.
4. ADJUSTMENT
- 8 -
PTC STARTER SEALED
TERMINAL
COMPRESSOR
MOTOR
C
M
SM
36
5
2
S
PTC
N
L1
OVERLOAD PROTECTOR
Resistance Starter Capacitor Running
Figure 12

4-3 OLP (OVERLOAD PROTECTOR)
4-3-1 Definition of OLP
(1) OLP (OVERLOAD PROTECTOR) is attached to the
Compressor and protects the Motor by opening the
circuit to the Motor if the temperature rises and
activating the bimetal spring in the OLP.
(2) When high current flows to the Compressor motor, the
Bimetal works by heating the heater inside the OLP,
and the OLP protects the Motor by cutting off the
current flowing to the Compressor Motor.
4-3-2 Role of the OLP
(1) The OLP is attached to the Sealed Compressor used
for the Refrigerator. It prevents the Motor Coil from
being started in the Compressor.
(2) For normal operation of the OLP, do not turn the Adjust
Screw of the OLP in any way.
4-4 TO REMOVE THE COVER PTC
1) Remove the Cover Back M/C.
(2) Remove the screw on Cover PTC.
(3) Remove two Housings on upper part of Cover PTC.
(4) Take out the cover PTC from upper to lower position
like .
(5) Turn 45 ¡ in the direction of and take it out.
(6) Assembly in reverse order of disassembly.
- 9 -
Part
Customer part
number
Lot code/
date code
330 FBYY -S1 BOX98
12345678
Physical
termination
part number
Electrical
characteristics
part number
No. Name
Base, phenolic
(UL 94 V-0 rated)
Movable arm support, plated steel
Stationary contact support,
plated steel
Heater support, plated steel
Heater, resistance alloy
Disc, thermostatic alloy
Movable arm, spring temper
copper alloy
Contact, movable, silver on copper
Contact, stationary, silver on copper
Slug, plated steel
Cover, polyester
(UL 94 V -0 rated)
Pin connector, plated copper alloy
(To engage 2.33/2.66 mm dia. pin)
Quick-connect terminal, brass,
conforms to UL 310, MEMA
DC-2, DIN 46344
(OVERLOAD PROTECTOR cross section)
Figure 13
1
2

5. CIRCUIT DIAGRAM
- 10 -

6. TROUBLESHOOTING
- 11 -
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
1
2
3
4
5
2
5
5
3
5
4
5
5
1
43
YES
YES
The range of resistance is between 1~50W (OK)
Not open
4.5~9 W
Open
Open or short
Open or short
YES YES
NO
NO
Power Source.
No Voltage.
(Reated Voltage
±10%)?
Replace OLP.
Reconnect.
Replace
PTC-Starter.
Replace OLP.
Did
compressor
start?
Compressor
is OK
Replace the
compressor
Check connection
condition.
OLP disconnected?
Advise customer that
power supply needs to be
checked by an electrician.
Replace
Compressor.
Supply
voltage rating
with ±10%.
Applied voltage isn't
in range of Rating
Voltage ±10%.
Remove PTC-Starter
from Compressor and
measure voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
Check resistance
between M-C, S-C and
M-S in Motor
Compressor.
Check resistance of
two terminals in
PTC-Starter.
Check resistance of two
terminals in OLP.
Check the power supply
under load.
(Compressor attempting
to re-start after being off
for 5 minutes).
Check
resistance of
Motor
Compressor.
Check
resistance of
PTC-Starter.
Check OLP.
Check
starting state.
NO

- 12 -
6-2 PTC AND OLP
65
Shows continuity
Open
Normal operation of
Compressor is
impossible or poor.
Separate PTC-Starter
from Compressor and
measure resistance
between No. 5 and 6
of PTC-Starter with a
Tester.
(Figure 14)
Separate OLP from
Compressor and check
resistance value
between two terminals
of OLP with a Tester.
(Figure 15)
Observation value is
115V/60Hz : 6.8 ±30%
The resistance value
is 0 (short) or
(open).
Check another
electric component.
Replace OLP.
Replace PTC-
Starter.
Figure 14 Figure 15

- 13 -
Not cooling at all
Poor cooling performance
Compressor
doesn't run.
Compressor runs
poorly.
Check starting
voltage.
Check for open short or
incorrect resistance readings
in the following components
a. Starting devices
b. OLP
c. Compressor coil
d. Wiring harness
Low voltage.
Short, open, or broken.
Poor contact
or shorted.
Coil open or shorted.
Poor contact
or shorted.
Poor or broken or
open contact.
Shorted.
Lack of capacity.
Replace
indicated component.
Advise customer that
the Power supply
needs to be checked
by an electrician.
Replace
indicated component.
Cause
Check voltage at
starting devices.
Check current flowing
in sub-coil of
Compressor.
Check rating of OLP.
Fan motor
doesn't run.
Heavy frost buildup on
EVAPORATOR.
Wire is open or
shorted.
Coil is shorted
or open.
Open.
Open. Replace
Defrost Heater.
Replace
indicated component.
Replace
indicated component.
Check wiring circuit.
Check Fan Motor.
Check current flow in
the following
components:
Sensor
Fuse-M
Check current flow in
the Defrost Heater.
6-3 OTHER ELECTRICAL COMPONENTS

6-4 SERVICE DIAGNOSIS CHART
- 14 -
COMPLAINT POINTS TO BE CHECKED REMEDY
Other possible problems:
Check if frost forms in
the freezer.
Check Components
of the defrosting
circuit.
Check the
refrigeration system.
Check the
Thermistor.
Not
defrosting
The system
is faulty. Perform sealed
system repair.
Replace the
Thermistor.
The operation of
the Thermistor is
incorrect.
No Cooling.
Cools poorly.
Foods in the
Refrigerator
are frozen.
Condensartion or ice
forms inside
the unit.
Condensartion forms
in the Exterior Case.
There is abnormal
noise.
Door does not
close well.
Ice and foods
smell unpleasant.
• Is the power cord unplugged from the outlet?
• Check if the power switch is set to OFF.
• Check if the fuse of the power switch is shorted.
• Measure the voltage of the power outlet.
• Check if the unit is placed too close to the wall.
• Check if the unit is placed too close to the stove,
gas cooker, or in direct sunlight.
• Is the ambient temperature too high or
the room door closed?
• Check if food put in the refrigerator is hot.
• Did you open the door of the unit too often
or check if the door is sealed properly?
• Check if the Control is set to Warm position.
• Is food placed in the cooling air outlet?
• Check if the control is set to colder position.
• Is the ambient temperature below 41°F(5° C)?
• Is liquid food sealed?
• Check if food put in the refrigerator is hot.
• Did you open the door of the unit too
often or check if the door is sealed properly?
• Check if the ambient temperature and humidity
of the surrounding air are high.
• Is there a gap in the door gasket?
• Is the unit positioned in a firm and even place?
• Are any unnecessary objects placed
in the back side of the unit?
• Check if the Drip Tray is not firmly fixed.
• Check if the cover of the compressor enclosure
in the lower front side is taken out.
• Check if the door gasket is dirty with
an item like juice.
• Is the refrigerator level?
• Is there too much food in the refrigerator?
• Check if the inside of the unit is dirty.
• Are foods with a strong odor unwrapped?
• The unit smells of plastic.
• Plug into the outlet.
• Set the switch to ON.
• Replace the fuse.
• If the voltage is low, correct the wiring.
• Place the unit about 4 inches (10 cm) from the wall.
• Place the unit away from these heat sources.
• Lower the ambient temperature.
• Put in foods after they have cooled down.
• Don't open the door too often and close
it firmly.
• Set the control to Recommended position.
• Place foods in the high-temperature section.
(front part)
• Set the control to Recommended position.
• Set the control to Warm position.
• Seal liquid foods with wrap.
• Put in foods after they have cooled down.
• Don't open the door too often and close
it firmly.
• Wipe moisture with a dry cloth. It will disappear
in low temperature and humidity.
• Fill up the gap.
• Adjust the Leveling Screw, and position the
refrigerator in a firm place.
• Remove the objects.
• Fix the Drip Tray firmly in the original position.
• Place the cover in its original position.
• Clean the door gasket.
• Position in the firm place and level the
Leveling Screw.
• Make sure food stored in shelves does not prevent
the door from closing.
• Clean the inside of the unit.
• Wrap foods that have a strong odor.
• New products smell of plastic, but this
will go away after 1-2 weeks.

6-5 REFRIGERATION CYCLE
- 15 -
Troubleshooting Chart
Leakage Detection
YES
YES
Check if compressor
runs.
Check if frost
forms in
Evaporator.
Observe the discharged
amount of Refrigerant.
Inject refrigerant in compressor
and check cooling operation.
Clogged by dust. Gas leakage.
Faulty
Compressor.
Moisture Clog
Check if oil
leaks.
Frost formed normally
Normal amount
None or too much
(Find the leak and repair it)
Frost formed normally
No frost
or frost forms
in inlet only
Check Compressor
PARTIAL Freezer Low flowing sound of A little higher • Refrigerant level is low due
LEAKAGE compartment and Refrigerant is heard and than ambient • to a leak.
Refrigerator don't frost forms in inlet only. temperature. • Normal cooling is possible by
cool normally. • restoring the normal amount of
•refrigerant and repairing the leak.
COMPLETE Freezer Flowing sound of refrigerant Equal to ambient • No discharging of Refrigerant.
LEAKAGE compartment and is not heard and frost isn't temperature. • Normal cooling is possible by
Refrigerator don't formed. • restoring the normal amount of
cool normally. • refrigerant and repairing the leak.
PARTIAL Freezer Flowing sound of refrigerant A little higher • Normal discharging of the
CLOG compartment and is heard and frost forms than ambient • refrigerant.
Refrigerator don't in inlet only. temperature. • The capillary tube is faulty.
cool normally.
WHOLE
Freezer Flowing sound of refrigerant Equal to ambient • Normal discharging of the
CLOG
compartment and is not heard and frost isn't temperature. • Refrigerant.
Refrigerator don't cool. formed.
MOISTURE Cooling operation Flowing sound of refrigerant Lower than • Cooling operation restarts
CLOG stops periodically. is not heard and frost melts. ambient • when heating the inlet of the
temperature. • capillary tube.
COMP- Freezer and Low flowing sound of A little higher • Low pressure at high side
RESSION Refrigerator refrigerant is heard and ambient • of compressor due to low
don't cool. frost forms in inlet only. temperature. • refrigerant level.
NO COMP- No compressing Flowing sound of refrigerant Equal to ambient • No pressure in the high
RESSION operation. is not heard and there is temperature. • pressure part of the
no frost. • compressor.
CAUSE
TEMPERATURE
OF THE
COMPRESSOR
REMARKS
STATE OF
THE UNIT
STATE OF THE
EVAPORATOR
LEAKAGE
CLOGGED BY DUST
DEFECTIVE
COMPRESSION
Observe the discharging point of the refrigerant, which may be in the oil discharging part of the compressor and in a hole
in the evaporator.

7-1 FUNCTION
7-1-1 Function
1. When the appliance is plugged in, it is set to 37 °F for the Refrigerator and 0 °F for the Freezer.
You can adjust the Refrigerator and the Freezer control temperature by pressing the COLDER button or the WARMER
button.
2. When the power is initially applied or restored after a power failure, it is set to the setting temperature as you set before
power off. (applied to DISPENSER MODEL)
7-1-2 How to Change the Temperature Mode to °F / °C
1. The setting temperature mode can be changed to °F / °C by pressing and holding COLDER key of Freezer and COLDER
key of Refrigerator over 1 second. at the same time.
2. The initial setting is °F. Whenever the mode is changed, the LED lights are changed.
7. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
- 16-
BEST MODEL

7-1-4 CONTROL OF FREEZER FAN MOTOR
1. Freezer fan motor has high and standard speeds.
2. High speed is used at power-up, for Ice Plus, and when refrigerator is overloaded.
Standard speeds is used for general purposes.
3. To improve cooling speed, the RPM of the freezer fan motor change from normal speed to high.
4. High speed (2700RPM) : Initial power on or load corresponding operation, Ice Plus.
Normal speed (2400RPM) : General working conditions.
5. Fan motor stops when refrigerator or freezer door opens.
7-1-5 ICE PLUS
1. The purpose of this function is to intensify the cooling speed of freezer and to increase the amount of ice.
2. Whenever selection switch is pressed, selection/release, the LED will turn ON or OFF.
3. If there is a power cutage and the refrigerator is power on again, ICE PLUS function will be canceled.
4. To activate these function, to press the ICE PLUS key and the LED will turn ON. This function will remain activated
for 24 hrs. The first three hours the compressor and Freezer Fan will be ON. The next 21 hours the freezer will be
controlled at the lowest temperature. After 24 hours or if the ICE PLUS key is pressed again, the freezer will return
to its previous temperature.
5. For the first three hours notice the following cases:
(1) Compressor and freezer fan (HIGH RPM) continuously operate for three hours.
(2) If defrost starts during ICE PLUS, ICE PLUS operates for the rest of time after defrost is
completed, when ICE PLUS operation time is less than 90 minutes.
If ICE PLUS operates for more than 90 minutes, the ICE PLUS will operate for two hours
after defrost is completed.
(3) If ICE PLUS is pressed during defrost, ICE PLUS is on but this function will start seven
minutes after defrost is completed and it shall operate for three hours.
(4) If ICE PLUS is selected with in seven minutes after compressor has stopped, the compressor (compressor
delays seven minutes) shall start after the balance of the delay time.
(5) The fan motor in the freezer compartment runs at high speed during ICE PLUS .
6. For the rest of the 21 hours, the freezer will be controlled at the lowest temperature.
7-1-6 REFRIGERATOR LAMP AUTO OFF
1. To avoid heat damage caused by the lamp, it is turned off automatically when the refrigerator door is open for more than 7
minutes.
7-1-7 Alarm for Open Door
1. This feature sounds a buzzer when the freezer or refrigerator door is not closed within 1 minute after it is opened.
2. One minute after the door is opened, the buzzer sounds three times each for 1/2 seconds. These tones repeat every 30
seconds.
3. The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds.
- 17-
Closed Open Closed Open
Closed
3 Times 3 Times 3 Times 3 Times
Within 1 min. 1 min. 30 sec 30 sec 30 sec
Freezer Door
or Refrigerator
Door
Buzzer

7-1-8 Buzzer Sound
When the button on the front Display is pushed, a Ding~ Dong~ sound is produced.
(Refer to the Buzzer Circuit 8-2-4 No. 3)
7-1-9 Defrosting (removing frost)
1. Defrosting starts each time the COMPRESSOR running time reaches 7 hours.
2. For initial power on or for restoring power, defrosting starts when the compressor running time reaches 4 hours.
3. Defrosting stops if the sensor temperature reaches 46.4°F(8° C) or more. If the sensor doesn’t reach 46.4°F(8° C) in
2 hours, the defrost mode is malfunctioning. (Refer to the defect diagnosis function, 8-1-13.)
4. Defrosting won’t function if its sensor is defective (wires are cut or short circuited)
7-1-10 Filter Replacement Indication
1. In 6 months after the UNIT (refrigerator) is power on, or after 28,000 seconds of dispenser use, the water filter Indicator
LED (red color) will be ON.
2. When the water filter indicator LED is illuminated, you should change the water filter. After this, you must press the water
filter button for three seconds and you will hear a ding-dong sound.
The LED will be OFF. This operation will indicate that the UNIT is reset to its initial conditions, so this process is restarted.
7-1- 11 Power Failure Compensation Function
1. When the UNIT is power off, the Fresh Food and Freezer Temperature notches, the filter elapsed time for replacement,
the temperature mode (°C or °F) and the dispenser lock mode are saved in the EEPROM.
2. When the UNIT is power on, the MICOM will read the specified EEPROM addresses to restore the values indicated in the
previous paragraph.
7-1-12 Electrical Parts Are Turned On Sequentially
Electrical parts such as COMP, defrosting heater, freezer FAN, etc. are turned on in the following order to prevent noise and
parts damage. Several parts are started at the same time at initial power on and are turned off together when TEST is
completed.
- 18 -
OPERATING ORDERS
Temperature of Defrosting
Sensor is 113°F(45°C) or
more (when unit is newly
purchased or when moved)
Temperature of defrosting
sensor is lower than
113°F(45°C)
(when power cuts, SERVICE)
Reset to normal operation
from TEST MODE
Initial power on
POWER
ON
in 1/2 second in 1/2 second
Total load
OFF
COMP
ON
Freezer FAN
ON
in 7 minute in 1/2 second
COMP
ON
Freezer FAN
ON
POWER
ON
COMP
ON
Freezer FAN
ON
Defrosting
heater ON
Defrosting
heater OFF
in 1/2 second
in 1/2 second in 1/2 second
in 10 second

7-1-13 Defect Diagnosis Function
1. Automatic diagnosis makes servicing the refrigerator easy.
2. When a defect occurs, the buttons will not operate; but the tones. such as ding. will sound.
3. When the defect CODE removes the sign, it returns to normal operation (RESET).
4. The defect CODE shows on the Refrigerator and Freezer Display.
ERROR CODE on display panel
- 19 -
BEST MODEL
NO ITEM ERROR CODE CONTENTS REMARKS
1
2
3
4
5
Failure of freezer
sensor
Failure of
Refrigerator sensor
Failure of defrost
sensor
Failure of defrost
mode
Failure of BLDC
FAN MOTOR at
freezing
compartment.
Cut or short circuit wire
Cut or short circuit wire
Cut or short circuit wire
When defrost sensor
doesn t reach 8 ºC within 2
hours after starting defrost.
If there is no fan motor
signal For more than
65sec. in Operation fan
motor
Inspect Connecting wires
on each sensor
Snapping of defrost heater
or Temperature fuse, pull-
out of Connector (indicated
minimum 2 Hours after
failure occurs)
Poor motor, hooking to
Wires of fan, contact of
structures to fan, snapping
or short circuit of Lead wire
Er
Er
Er
Er
Er
FS
rS
dS
dH
FF

7-1-14 TEST Mode
1. The Test mode allows checking the PCB and the function of the product as well as finding out the defective part in case of
an error.
2. The test mode is operated by pressing two buttons at Display panel.
3. While in the test mode, the function control button is not recognized, but the recognition tone (beep~) sounds.
4. After exiting the test mode, be sure to reset by unplugging and then plugging in the appliance.
5. If an error, such as a sensor failure, is detected while in the test mode, the test mode is cleared and the error code is
displayed.
6. While an error code is displayed, the test mode will not be activated.
NOTE : LED CHECK MODE: When the WARMER button in the refrigerator temperature control and the WARMER button in
the freezer temperature control are pushed and held for 1 second or longer, every LED on the display turns on at
the same time. When the buttons are released, the previous mode is restored.
* Freezer Fan RPM Variable Check:
In case the freezer fan is in operation when the WARMER KEY in Refrigerator and Freezer Temp. Control are pressed for
more than one second at the same time freezer fan RPM changes. (for example if high speed, to normal speed or if
normal speed, to high speed for 30 seconds)
After 30 seconds, it turns to its original RPM.
* Demostration MODE:
1. When the WARMER KEY of refrigerator Temp. control or of freezer Temp. control in the the warmest temperature
status are pushed and held for 3 seconds or longer, It converts to Demonstration Mode.
2. It shows OFF on the display panel.
3. In this status, all Loads are off (Compressor / Fan / Damper / Heater)
(Even is Demonstration Mode, the refrigerator Lamp automatic off function warks normally and can be demonstrated)
4. Exit the test mode and reset the display by pressing any warmer button during 3 second.
- 20 -
MODE MANIPULATION CONTENTS REMARKS
TEST1
TEST2
Reset
Push ICE PLUS
key and COLDER KEY of
Freezer Temp. at the
same time over 3
seconds.
Push ICE PLUS
key and COLDER KEY of
Freezer Temp. at the
same time over 3 seconds
in TEST MODE 1
Push ICE PLUS
key and COLDER KEY of
Freezer Temp. at the same
time over 3 seconds. in
TEST MODE 2
1. Continuous operation of the
COMPRESSOR
2. Continuous operation of the freezer fan
3. STEPPING DAMPER OPEN
4. Defrosting Heater OFF
5. Every DISPLAY LED ON
1. COMP OFF
2. Freezer FAN OFF
3. STEPPING DAMPER CLOSE
4. Defrosting heater ON
5. DISPLAY LED shows 222
Reset to the previously setting before
TEST MODE
Reset if the
temperature of the
Defrosting sensor
is 46°F(8°C) or more.
The compressor will
Start after a 7-minute
delay.