LG SxS LRSPC2661T User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS BOOK
BEFORE SERVICING OR OPERATING THE REFRIGERATOR.
MODEL: LRSPC2661T COLOR: TITANIUM
REFRIGERATOR
SERVICE MANUAL
http://biz.lgservice.com
Ref. No.
GR-D267DTU

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION....................................................................................................................................................... 5
HOW TO INSTALL THE REFRIGERATOR............................................................................................................................ 6
HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR.......................................................................................... 6
HOW TO INSTALL WATER PIPE......................................................................................................................................... 7
HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER........................................................... 8
COOLING CYCLE AND REFRIGERANT............................................................................................................................. 10
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS....................................................................................... 12
COMPRESSOR (RECIPROCATING TYPE)...................................................................................................................... 12
OVER LOAD PROTECTOR............................................................................................................................................... 12
POSITIVE TEMPERATURE COEFFICIENT (PTC)............................................................................................................ 12
SWITCH (DOOR, HOME BAR, DISPENSER)................................................................................................................... 13
MOTOR .............................................................................................................................................................................. 14
SOLENOID......................................................................................................................................................................... 14
HEATER ............................................................................................................................................................................. 15
VALVE................................................................................................................................................................................. 17
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD........................................................... 18
MICOM FUNCTION .............................................................................................................................................................. 24
EXPLANATION FOR MICOM CIRCUIT .............................................................................................................................. 32
CIRCUIT................................................................................................................................................................................ 52
PROBLEM DIAGNOSIS ....................................................................................................................................................... 53
PROBLEM SHOOTING...................................................................................................................................................... 53
FAULTS .............................................................................................................................................................................. 63
COOLING CYCLE HEAVY REPAIR................................................................................................................................... 80
HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 87
HOW TO DISASSEMBLE AND ASSEMBLE(REFRIGERATOR SECTION)....................................................................... 92
DOOR................................................................................................................................................................................. 92
HANDLE............................................................................................................................................................................. 93
DEODORIZER.................................................................................................................................................................... 93
SHROUD, GRILLE FAN..................................................................................................................................................... 94
CONTROL BOX, R............................................................................................................................................................. 94
CASE PWB......................................................................................................................................................................... 94
ICEMAKER ASSEMBLY..................................................................................................................................................... 95
DISPENSER....................................................................................................................................................................... 96
WATER TANK AND WATER LINE...................................................................................................................................... 97
DIGITAL SECTION LAYOUT................................................................................................................................................ 98
DIGITAL PARTS MANUAL................................................................................................................................................. 101
TROUBLESHOOTING FOR THE DIGITAL FUNCTION SECTION ................................................................................... 122
EXTERNAL EXTENSION PORT ........................................................................................................................................ 131
HOW TO DISASSEMBLE AND ASSEMBLE(DIGITAL SECTION) ................................................................................. 132
EXPLODED VIEW .............................................................................................................................................................. 136
DIGITAL SECTION COMPONENTS .................................................................................................................................. 144
REPLACEMENT PARTS LIST .......................................................................................................................................... 146
CONTENTS
- 2 -

Please observe the following safety precautions in order to
safely and properly use the refrigerator, to avoid hazards,
and prevent accidents during repair.
1. Avoid the risk of electric shock. Disconnect power cord
from wall outlet and wait for more than three minutes
before replacing PWB parts. Shut off the power
whenever replacing and repairing electric components.
2. When connecting power cord, make sure that the power
cord has been disconnected from the wall outlet for at
least five minutes.
3. Check for damage to the power cord and plug. If the
power cord or plug is damaged, it could cause a fire or
electric shock.
4. The refrigerator should have its own individual electrical
outlet. Overloading any outlet can cause a fire.
5. Please make sure the outlet is properly grounded,
particularly in a wet or damp area.
6. Use standard electrical components when replacing
parts.
7. Make sure water connection is correctly engaged.
Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, machine, heavily bend, yank, or
twist the power cord.
9. Check for evidence of moisture intrusion in the
electrical components. Replace the parts or mask them
with insulation tape if moisture intrusion is evident.
10. Do not touch the Icemaker with hands or tools to
confirm the operation of geared motor.
11. Do not let the customer repair, disassemble, or
reconstruct the refrigerator for themselves. Servicing
carries the risk of electric shock, fire and other hazards.
12. Do not store hazardous materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put flower vases, cups, cosmetics, chemicals,
etc., or container with fall of liquid on the top of the
refrigerator.
14. Do not put glass bottles full of liquid into the freezer.
The contents could freeze and break the glass bottles.
15. When scrapping the refrigerator, please disconnect the
door gasket first, and scrap the refrigerator in a location
where no children have access.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

SPECIFICATIONS
- 4 -
ITEMS SPECIFICATIONS
DIMENSIONS 960(W) X 915(D) X 1795(H) mm
(377/8
X 361/4 X 702/3in.)
NET WEIGHT 169kg (3721/2lbs.)
COOLING SYSTEM Fan Cooling
TEMPERATURE CONTROL Micom Control
DEFROSTING SYSTEM Full Automatic
Heater Defrost
INSULATION Cyclo-Pentane
COMPRESSOR PTC Starting Type
EVAPORATOR Fin Tube Type
CONDENSER Wire Condenser
REFRIGERANT R134a (210g) (67/8oz.)
LUBRICATING OIL FREOL @15G (330 cc)
DRIER 1Ø0.83
CAPILLARY TUBE MOLECULAR SIEVE XH-7
ITEMS SPECIFICATIONS
FIRST DEFROST 5 - 6 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath-AL
Heater, Sheath-ML
Heater, Drain
ANTI SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
Frame LCD Heater
ANTI-FREEZING HEATER Chilled Room Duct Heater
Damper Heater
Tube Inject Heater
FREEZER LAMP 60W (1 EA)
REFRIGERATOR LOWER LAMP 60W (1 EA)
REFRIGERATOR UPPER LAMP 30W (2 EA)
DISPENSER LAMP 15W (1 EA)
1790 (701/2)
1750 (6815/16)
1795 (7011/16)
1072 (201/4)
960 (3713/16)
750 (299/16)
801 (319/16)
875 (341/2)
915 (361/4)
1407 (557/16)
<Front View> <Top View>

PARTS IDENTIFICATION
- 5 -
Icemaker
Bank Ice
Cover, Lamp -F
Shelf F
Drawer
Supporter
Basket
Cover Lower
Dairy Product Corner
Control Box, R
Cover, Lamp-R(U)
Cantilever Shelf
Egg Box
Snack Corner
Cover, Lamp-R(L)
Fruit/Vegetable
Drawer
Vegetable/Chilled
Drawer
Guide Bottle
Adjust Screw
(right)
Supporter Basket
Cover
Adjust Screw
(Ieft)
Slide Out
Cantilever Shelf
Guide Bottle
Vegetable/Chilled Drawer
Convertible Switch
Wine Rack
Optional Part
Cover PWB
Back
Handle
Frame
Display
Dispenser
Lamp
Remote Control
Receiver
Camera
Mic
Ice & Water
Dispenser
Button
Monitor
Management Switch Reset Switch
Screen ON/OFF Switch

1. How to Adjust Door Height of Refrigerator
■Make the refrigerator level first. (If the refrigerator is not installed on a level floor, the height of freezer and refrigerator
door may not be the same.)
1. If the height of freezer door is lower than the
refrigerator door: 2. If the height of freezer door is higher than the refrigerator door:
Insert a driver into the groove of adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
Insert a driver into the groove of adjusting screw
and rotate driver in arrow direction (clockwise) until the
refrigerator becomes horizontal.
HOW TO INSTALL REFRIGERATOR
- 6 -
Adjusting
Screw
Driver
Height
Difference
Height
Difference
Height
Difference
1
2
Height
Difference

2. How to Install Water Pipe
■Install Water Filter (Applicable to some models only)
■Before Installing water filter
1. Before installing the filter, take out the top shelf of the
refrigerator after tilting it to the direction () and lifting it
to the direction () and move it to the lower part.
2. Remove the lamp cover by pressing the protrusion
under the cover and pulling the cover to the front.
■Installing water filter
1. Initial installation of water filter
Remove the filter substitute cap by turning it
counterclockwise () by 90 degrees and pulling it down.
Note : Keep it for later use when you do not use the filter.
Remove the red cap from the filter and attach the
sticker. Insert the upper part of the filter () after
aligning with the guideline marked on the control box,
and fasten it by turning it clockwise by 90 degrees.
Note : Verify that the guideline and the fastening indication
line are aligned.
2. Replacement of water filter
While holding the lower part of the filter, turn it
counterclockwise () by 90 degrees and pull it down.
Note : Verify that the guideline and the loosening indication
line are aligned.
■After installing water filter
Reassemble the lamp cover and the top shelf of the
refrigerator. To place the top shelf of the refrigerator, raise
the front part of the shelf a bit so that the hook of the shelf
fits into the groove.
In order to clean the water filter system, drain water for
about 3 min.
Note : Then open the door of the refrigerator and check for
water dripping on the shelf under the filter.
HOW TO INSTALL REFRIGERATOR
- 7 -
Control box
Aligning with the guide line
and the fastening indication line
Control box
Aligning with the guide line
and the loosening indication line
Removal
of red cap Adhesive
Sticker
Substitute
cap

3. How to Control the Amount of Water Supplied to Icemaker.
3-1. Verify the amount of water supplied to the Icemaker.
1. Pull out the ice bin in the upper part of the freezer compartment.
Caution : •Do not put hands or tools into the chute to
confirm the operation of geared motor.
(Doing so may damage refrigerator or cause
injury to hands.)
•Check the operation of motor by its
operation noise.
2. Apply electricity after connecting water pipe.
1) Press test switch under the Icemaker for two seconds as shown below.
2) The bell rings(ding~dong), ice tray rotates, and water comes out from the Icemaker water tube.
3) The water shall be supplied two or three times into the tray. The amount of water supplied for each time is small.
Put a water container under the ice tray and press test switch.
4) When ice tray rotates, the water in it will spill. Collect the spilled water and throw it into the sink.
5) When ice tray has finished rotation, water comes out from the water tube. Confirm the amounts of water in the ice tray.
(Refer to fig. The optimum amount of water is 110cc[6.7in3])
* It is acceptable if the adjusted level of water is a bit smaller than optimum level.
HOW TO INSTALL REFRIGERATOR
- 8 -
21
Test Switch
Confirm the amount
of water
Icemaker
Too much
Too small
Optimum level

3-2. Control the amount of water supplied to the
Icemaker.
Caution : •Unplug the power cord from the wall outlet and
wait for more than three minutes before
disconnecting PWB cover as 310V is applied in
the control panel.
1. Disconnect PWB cover from the upper part of the
refrigerator.
2. Adjust the amount of water supplied by using the DIP
switch.
■Water Supplying Time Control Option
1) The water supplying time is set at five seconds when the
refrigerator is delivered.
2) The amount of water supplied depends on the setting
time and the local water pressure.
3) If the ice cubes are too small, increase the water
supplying time. This happens when too little water is
supplied to the tray. (eg: change 5 to 5.5 seconds)
4) If ice cubes stick together, decrease the water supplying
time. This happens when too much water is supplied
into the ice tray. (eg: change 5 to 4.5 seconds)
Caution : When adjusting the amount of water supplied,
adjust in small increments. Otherwise the water
may spill over.
3. When adjustment of control switch for the amount of
water supplied is complete, check the level of water in
the ice tray.
HOW TO INSTALL REFRIGERATOR
- 9 -
SWITCH NO Water Suppling
Switch1 Switch2 Switch3 Time
OFF OFF OFF 6 Sec.
ON OFF OFF 4 Sec.
OFF ON OFF 4.5 Sec.
ON ON OFF 5 Sec.
OFF OFF ON 5.5 Sec.
ON OFF ON 7 Sec.
OFF ON ON 8 Sec.
ON ON ON 9 Sec.
(+) Driver
1
ON
Switch ON
Switch OFF 23
PWB(PCB) Assembly
Confirm the amount
of water
Optimum level

1. Cooling Cycle (Cooling Principles/Refrigerant Gas Circulation)
1-1. Principles of cooling cycle
Cooling is an operation by which the temperature of a unit is maintained below the ambient temperature. For the
cooling operation, there must be an insulated space, the refrigerant (R134a) to absorb heat in the space, and a
refrigerant circulation system including a compressor, condenser, evaporator, etc. to conduct phase transformation of
the refrigerant.
1-2. Refrigerant gas circulation
Compressor
Wire Condenser
Hot Line (Freezer Compartment)
Hot Line (Refrigerator Compartment)
Drier
Capillary Tube
Evaporator
Suction Pipe
Cooling Fan
1-3. Cool Air Circulation
Freezer Compartment Refrigerator Compartment
COOLING CYCLE AND REFRIGERANT
- 10 -
2
9
1
5
8
3
7
4
6

2. Description of each component
NOTE : • The pressure of refrigerant changes from high to low at capillary tube outlet. The low pressure refrigerant rushes
into the evaporator inlet and makes noise.
• When low pressure liquid refrigerant evaporates in the evaporator, evaporation takes place in the entire
evaporator from inlet to outlet. When this occurs, noise may sometimes occur. Noise depends on the amount of
evaporation so that noise may or may not occur. This is not a problem.
3. Containing refrigerant and foaming agent
* ODP: Ozone Depletion Index(relative value based on CFC11 as 1.0)
GWP: Globe Warmth Index(relative value based on CO2as 1.0)
COOLING CYCLE AND REFRIGERANT
- 11 -
Refrigerant Characteristics ODP GWP Remarks
Cyclo-Pentane It does not contain chlorine which depletes ozone layer. 0 8 Foaming Agent
(C5H10) Its GWP is almost zero. Pollution-free foaming agent.
R134a It does not contain chlorine which depletes ozone layer. 8 1200 Refrigerant
(HFC-134a) Its GWP is also very low compared with that of R12
(GWP:15,300).
NO. NAME FUNCTION REFRIGERANT (IN AND OUTLET)
Compresses refrigerant from low(0 kg/cm2) to
high pressure(8-12 kg/cm2)
Refrigerant transforms from high pressure gas
to high pressure liquid in condenser.
This phase transfromation dissipates heat.
Drier absorbs moisture in the system.
(moisture absorption equipment)
Long and narrow tubes. Refrigerant pressure
drops rapidly as refrigerant passes through the
tube.
Refrigerant transforms from low pressure liquid
to low pressure gas. This phase change absorbs
heat from the surrounding air and food. This
enables foods to freeze in the freezer and to
stay fresh in the refrigerator compartment.
Connects evaporator and compressor.
LOW PRESSURE
GAS(0 kg/cm2)
TEMP(30°C[86°F])
HIGH PRESSURE
GAS(8-12 kg/cm2)
TEMP(80[176°F]-
120°C[248°F])
HIGH PRESSURE
LIQUID(8-12 kg/cm2)
TEMP(40[104°F]-
60°C[140°F])
LOW PRESSURE
LIQUID(0 kg/cm2)
TEMP(-27°C[-17°F])
LOW PRESSURE
GAS(0 kg/cm2)
TEMP(-27°C[-17°F])
→ HIGH PRESSURE
GAS(8-12 kg/cm2)
TEMP(80[176°F]-
120°C[248°F])
→ HIGH PRESSURE
LIQUID(8-12 kg/cm2)
TEMP(40[104°F]-
60°C[140°F])
→ LOW PRESSURE
LIQUID(10 kg/cm2)
TEMP(-27°C[-17°F])
→ LOW PRESSURE
GAS(0 kg/cm2)
→ LOW PRESSURE
GAS(0 kg/cm2)
TEMP(30°C[86°F])
COMPRESSOR
CONDENSER
DRIER
CAPILLARY
TUBE
EVAPORATOR
SUCTION PIPE
1
2
3
4
5
6

1. Compressor(Reciprocating Type)
The compressor consists of a piston and motor. The motor
pushes piston and piston which compresses refrigerant
gas to a high pressure. Lubricants are sealed in the
compressor to a accelerate cooling and lubricate
compressor. Low pressure refrigerant is distributed through
the entire compressor but high pressure refrigerant gathers
around outer cooling plate through the outlet pipe.
NOTE : • A replacement compressor for service is full of
nitrogen gas and sealed with rubber when it is
delivered. This is to protect oxidation and to prevent
the intrusion of moisture into the compressor. When
bushing seals are removed, nitrogen gas shall rush
out, producing noise. This is normal. If the nitrogen
gas was leaked out. the compressor may be
corroded and should not be used.
• Compressor should be protected from impact
during transportation or storage to prevent
eccentricity of motor axis.
2. Over Load Protector
Over load protector relay protects motor by breaking
circuits when temperature rises and excess current flows in
the compressor. It consists of bimetal element and heater.
Bimetal element defroms when temperature rises and
heater emits heat when over current flows. This relay is
mounted on the outer surface of compressor and senses
temperature of compressor. This relay is connected to the
compressor motor in series. When operating contact point
of bimetal comes off from fixed contacting point, over load
protector relay breaks circuit. When the temperature of
compressor lowers and the heater cools, the operating
contact points move back to the fixed contact point and the
compressor works again after 3 or 5 minutes.
NOTE : • Over load protector relay detects temperature
and current at the same time. It operates when
the temperature of compressor is high even there
is no current. It shall also operates when over
current flows even the temperature of
compressor is low. It is also possible that both
high temperature and over current shall operate
relays at the same time.(Current is more effective
than temperature.)
• Over load protector relay shall operate again if
the surface temperature and current of
compressor repeats a breach of the threshold
values even though the heater is cools down
after 3 or 5 minutes of downtime. Customer may
claim that the relays repeated on and off
operation as the temperature remained constant.
In this case, switch off the power and let the
compressor cool down fully. If the relay
malfunctions after this, replace it with a new one.
3. Positive Temperature Coefficient (PTC)
Starter is connected to auxiliary winding in series and
accelerates compressor starting. It is located on outer case
of compressor with relays. Previously, the starter was a
contact point type. but it is now generally a PTC element
type. PTC stands for positive temperature coefficient and it
has a starting value of resistance(e.g. 22 Ω). It is an
element whose resistance becomes infinitive when current
flows. The starting principles of a single-phase induction
motor and simple alternating current circuit must be fully
understood in order to understand the roles of starter. The
circuit is shown below.
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 12 -
AC
CS CR
P.T.C
Piston
Motor
Spring
Iubricant

4. Switch(Door, Dispenser)
1. Function
1) Door switches in freezer and refrigerator compartments turns on and off the lamps when the freezer and refrigerator
doors are opened and closed. They also switch the fans in the freezer compartment on and off at the same time.
2) Home bar switch turns on and off the lamp in the refrigerator compartment when home bar is open and close.
3) Dispenser switch turns the dispenser lamp on and off when dispensing ice/water.
2. Operation Principles and Characteristics
3. Troubleshooting
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 13 -
Classification Door Switch Dispenser Switch
Shapes
Circuits
Troubles (Parts) Symptoms Check Measures
1
2
3
4
34
12
- The switch points make contact depending on
wheather one of the doors is opened or closed.
These control the lamps in the refrigerator and
the freezer compartments.
- The dispenser bushing button is pressed by the
switch lever. This turns on the dispenser lamp.
Operation
Principles
/Charact
-eristics
Lamp is not on when door is
open. (door switch)
1. Dispenser lamp is not on
when bushing button is
pressed.
2. Ice and water are not
dispensed.
Bad Contact Operate switch button three or
four times and verify that the
lamp is on and off. See if lamp is
burnt out. If lamp is O.K, then
remove switch and measure the
resistance between terminals.
(Door Switch: 1-2, 3-4.)
Operate switch button three and
four times and confirm the lamp,
ice and water dispenser work. It
they do not work, then remove
switch and measure the
resistance between terminals.
(COM-NO)
Replace switch if the resistance
between terminals is not zero.
Replace switch if the resistance
between terminals is zero.

5. Motor
1. Freezer/Cooling Motor Used mainly for
Freezer/Cooling motor
■Detail of connector
2) Gear Box Application Type
Gear box is used for moving and crushing ice which is
stored in the ice bin. Gear box is connected at the output
axis of shaded motor. Gear box changes high RPM of
motor to low RPM but high power by gear box. This power
can move and crush ice.
6. Solenoid.
1. Structure of Solenoid
Two types of solenoids are used for refrigerator depending
on the applications such as solenoids for ice cube and ice
dispenser. The solenoid is composed of an armature,
stator and a main body which supports stator and pulls the
armature when electricity is applied.
2. Operation Principles
When electricity is applied to the coil, magnetic field forms
around the coil. The armature in the magnetic field moves
toward the stator and ice dispenses. When electricity is
removed, the armature moves back to its original position
(rated stroke distance) by the spring force and stops
moving.
CAUTIONS : • Do not operate solenoid for more than two
minutes. It may be overheat.
• Solenoid is not for continuous use but
discontinuous use as it operates when
customer dispenses ice.
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 14 -
Shaft
Stator
Connector
Front(SHAFT Projective direction)
15Vdc(+)
EMF
GND(-)
Stator
Bobbin
Shaft
Gear Box
Stator
Coil Coil
Stator
ArmatureArmature
<Solenoid for ice cube> <Solenoid for dispenser>

3. Troubleshooting
7. Heater
1. Summary
Heaters are used to remove dew and frost on the evaporator and ice and dew on the parts of refrigerator.
* SXS Refrigerator Defrost System
It is MICOM controlled automatic defrost system.
Heater turns on when the set time in MICOM has elapsed and off when the defrost sensor senses the defrost is complete.
2. Types of heater and their roles
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 15 -
Symptom Faults(parts) Check Measures
Crushed ice comes out when 1. Connector is missed. 1. Check connection parts. 1. Join connector.
ice cube is selected. 2. Solenoid for ice cube is cut. 2. Check resistance between 2. Replace parts.
terminals. The resistance is
infinite when it is cut.
Ice does not dispense but 1. Connector is disconnected. 1. Check connecting part. 1. Join connector.
jams on the door path 2. Solenoid for dispenser is 2. Check the resistance 2. Replace parts.
when ice is selected. cut. between terminals.
Resistance is infinite
when it is cut.
Classification Application Functions Resistance Remarks
Heater, Sheath-AL Evaporator Upper Part Evaporator Defrost 240W
Heater, Sheath-ML Evaporator Lower Part Evaporator Defrost 260W
It melts and discharges the ice dropped
Heater, Plate Drain Lower Part from the evaporator through drain pipe 45W
during defrost.
Heater, Plate Chilled Room Duct Prevent icing from the chilled room duct. 5W
Heater, Plate Damper Prevent icing from damper 3W
Heater, Plate Dispenser(Freezer door) Remove dew from dispenser 5W
Heater, Sheet Dispenser(Freezer door) Remove dew from duct door. 1W
Heater, Cord Frame LCD Prevent icing from Home Bar. 2.7W
Heater, Plate Tube Inject Prevent icing Tube Inject 3.5W

3. Faults Symptom (Products): faulty heater
1) Heater, Sheath-ML/AL
2) Heater Plate (Drain)
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 16 -
Problem Symptom Checks Measures
Problem Symptom Checks Measures
1. The resistance is infinity when it is
measured at both connector ends
with a tester.
2. Visually check for a faulty defrost
with eyes.
3. The resistance fluctuates very much
when the resistance is measured at
both ends with a tester.
4. When the resistance between both
connector ends is measured with a
tester, the resistance is zero or
beyond the allowance of marked
value. (allowance: marked value±7%)
Poor Defrost
Short circuit
1. Heater, Sheath heating
wire is cut, corroded, or
connecting wire is cut.
2. Evaporator is not close
enough to Heater,
Sheath-AL.
3. Poor terminal contact.
4. Moisture intrudes into
the pipe through the
crack as Heater,
Sheath-AL Pipe, and/or
Silicon Cap are dented.
1. Replace parts. (Reconnect if
wire is disconnected.)
2. Move evaporator closer to
Heater, Sheath-AL.
3. Correctly insert connector.
4. Replace parts.
1. The resistance is infinity when the
resistance is measured at both
connector ends with a tester.
2. The resistance fluctuates very
much when the resistance is
measured at both connector ends
with a tester.
3. When the resistance between both
connector ends is measured with a
tester, the resistance is zero or
beyond the allowance of marked
value. (allowance: marked
value±7%)
Poor defrost
Short circuit
1. Heating wire is cut or
corroded.
2. Poor terminal contact.
3. Moisture intrudes as
the heating wire is
damaged by a sharp fin
of evaporator.
1. Replace parts. (Reconnect if
wire is cut)
2. Correctly reinsert the connector.
3. Replace parts.

3) Other Heaters
8. Valve
1. Nomenclature of each part
Solenoid Coil
Spring
Plunger
Packing
Holder
Flow Control
Flow Washer
2. Operation Principles
1) While Opening
When power is on and the inlet water pressure reaches
at a certain value, the plunger (3) moves up by solenoid
coil. The water passes through porous hole and then
center holes of the holder and flows to the outlet. Flow
control (6) and flow washer (7) are included in order to
maintain a constant flow rate and pressure (1.0 ~
8.0 kgf/cm2) in A line (water supplied to icemaker).
2) While Closing
The water stops flowing to outlet as packing seals (4)
the hole of holder (5) by spring when power is off.
FUNCTIONS AND OPERATION PRINCIPLES OF MAIN PARTS
- 17 -
Corresponding
Problem Heater Symptom Checks Measures
1. Heating wire is Heater Plate The temperature of chilled 1. The resistance is infinite when the 1. Replace parts.
cut or corroded. (Chilled drawer drawer is high. resistance is measured at both (Reconnect if the wire
2. Poor terminal duct) (icing on duct) connector ends with a tester. is cut)
contact. 2. The resistance significantly very much 2. Correctly insert
when the resistance is measured at both connector.
connector ends with a tester.
Heater Plate Incorrect refrigerator
(damper) compartment temperature.
(icing on the duct)
Heater Plate Dew forms around the 1. Remove connector from freezer hinge
(dispenser) dispenser and measure the resistance of heater.
Sheath Heater Dew forms around duct door. 1. The resistance is infinite when it is
(duct door) measured at both connector
ends with a tester.
Cord Heater Dew forms around 1. Remove connector from R hinge and
(Frame LCD) Frame LCD. measure the resistance of heater.
823
6
7
5
4
1
AB Outlet
Inlet

1. Working Principles
1-1. Icemaker Working Principles
1-2. Dispenser Working Principles
1. This function is available in Model GR-D267 where water and ice are available without opening freezer compartment door.
2. Crushed Ice is automatically selected when power is initially applied or reapplied after power cut.
3. When dispenser selection switch is continuously pressed, light is on in the following sequence:
Water →Cube Ice →Crushed Ice.
4. Lamp is on when dispenser bushing button is pressed and vice versa.
5. When dispenser crushed ice bushing button is pressed, dispenser solenoid and geared motor work so that crushed ice
can be dispensed if there is ice in the ice bin.
6. When dispenser cube ice bushing button is pressed, dispenser solenoid, cube ice solenoid and geared motor work so
that cubed ice can be dispensed if there is ice in the ice bin.
7. When dispenser water bushing button is pressed, water valve opens and water is supplied if water valve is properly
installed on the right side of the machine room.
8. Ice and water are not available when freezer door is open.
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD
- 18 -
•Level Icemaker Cube Mould for Initial Control
after power is applied.
Power Input
Initial Control
Ice Making Control
Ice Ejection Control
Water Supply Control
Test Control
•Wait until the water in the cube mould is frozen
after Icemaker starts operation.
•Detect if ice bin is full of ice by rotating ice ejection
motor in normal and reverse direction and eject ice into
the ice bin if ice bin is not full.
•
This is for refrigerator assembly line and service. When ice making test switch is pressed,
it operates in the following steps: initial ice ejection water supply control steps.
•Conduct Ice Making Control after supplying water into the Icemaker
cube mould by operating water valve.

2. Function of Icemaker
2-1. Initial Control Function
1. When power is initially applied or reapplied after power loss, the Icemaker cube mould level is detected after completion
of MICOM initialization. The detecting lever moves up and down.
2. The level of Icemaker cube mould is determined by output signal, high and low signal, of Hall IC. The cube mould is
leveled by rotating ice ejection motor in normal or reverse direction. The High/Low Hall signal is be applied to MICOM Pin
No. 42.
3. If there is no change in signals one minute after the geared motor starts to operate, it stops Icemaker operation and
checks the signal every hour. It reinitializes the Icemaker when the feedback signals becomes normal.
4. It datermines that the initialization is completed when it senses the Icemaker cube mould is horizontal.
5. Ice ejection conducts for 1 cycle whether ice or not ice is in the ice bin when power is initially applied.
2-2. Water Supply Control Function
1. This function supplies water into the Icemaker cube mould by operating the water valve when ice ejection control is
completed and Icemaker mould is level.
2. The quantity of water supplied is determined by DIP switches and water pressure.
<Water Supply Quantity Table>
3. The refrigerator actively detects the DIP switch seting so that interrupting power is not necessary to change the supply
preset. If the DIP switches are changed while water is being supplied, the changes will take effect until the supply cycle is
complets.
4. When water supply signal is applied to water and ice valves at the same time during water supply, water is supplied to
water valve. If water supply signal is applied to ice valve during water supply, water is supplied to both water and ice
valves.
2-3. Ice Making Control Function
1. Ice making control is carried out from the completion of water supply to the completion of ice making in the cube mould.
Ice making sensor detects the temperature of cube mould and completes ice making. (ice making sensor is fixed below
Icemaker cube mould)
2. Ice making control starts after completion of water supply control or initial control.
3. Ice making is determined to be completed when ice making sensor temperature reaches at -8°C[18°F] 100 minutes after
water is supplied to Icemaker cube mould.
4. It is judged that ice making is completed when Icemaker sensor temperature reaches below -12°C[10°F] after 20 minutes
in condition 3.
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD
- 19 -
DIP SWITCH SETTING
No SWITCH 1 SWITCH 2 SWITCH 3 WATER SUPPLY TIME REMARKS
1 OFF OFF OFF 6.5 Sec.
2 ON OFF OFF 5.5 Sec.
3 OFF ON OFF 6 Sec.
4 ON ON OFF 7 Sec.
5 OFF OFF ON 7.5 Sec.
6 ON OFF ON 8 Sec.
7 OFF ON ON 9 Sec.
8 ON ON ON 10 Sec.
* The quantity of water supplied
depends on DIP switch setting
conditions and water pressure as it is
a direct tap water connection type.
(the water supplied is generally 80 cc
to 120 cc)
* DIP switches are on the main PWB.

2-4. Ice Ejection Control Function
1. This function ejects the ice from the Icemaker cube mould after ice making is completed.
2. If Hall IC signal is on within 3.6 seconds after ice ejection motor rotates in normal direction, it does not proceed with ice
ejection. but waits. If the ice bin is full, ice ejection motor rotates in normal direction in every hour to check the condition of
ice bin. If the ice bin is not full, the water supply control starts after completion of ice ejection control. If the ice bin is full,
ice ejection motor rotates in reverse direction and stops ice making.
3. If ice bin is not full, ice ejection starts. The cube mould tilts to the maximum and ice is separated from the mould as ice
checking lever raises.
4. Ice ejection motor stops for 1 second if Hall IC signal changes from OFF (low) to ON (high) after 3.6 seconds when ice
ejection motor has rotated in normal direction. If there is no change in Hall IC signals within 1 minute after ice ejection
motor operates, ice ejection motor stops as ice ejection motor or Hall IC is out of order.
5. If ice ejection motor or Hall IC is abnormal, ice ejection motor rotates in normal direction to perform its reinitialization. It
resets the Icemaker if the ice ejection motor or Hall IC is normal.
6. The mould stops for 1 second at maximum tilted conditions.
7. The mould returns to a leveled position as ice ejection motor rotates in reverse direction.
8. When the mould is level, the cycle starts to repeat:
Water Supply →Ice Making →Ice Ejection →Mould Returns to Horizontal
ICEMAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD
- 20 -
Bank is
not full
HALL IC
OUTPUT
SIGNALS
Bank is
full
HALL IC
OUTPUT
SIGNALS
ICE CHECKING
AXIS
ICE CHECKING LEVEL 30°
Maximum tilting
point
Ice making
(Original point)
Lock
2±1 sec
9±3 sec
8±3 sec
Ice Checking Ice Ejection Lock
Horizontal
Conditions
Level Retrun
Conditions
<Timing Chart During Ice Ejection>