PARTS IDENTIFICATION....................................................................................................................................................... 4
DOOR SWITCH.................................................................................................................................................................... 5
FAN AND FAN MOTOR........................................................................................................................................................ 6
DEFROST CONTROL ASSEMBLY...................................................................................................................................... 6
CONTROL BOX-REFRIGERATOR...................................................................................................................................... 6
TO REMOVE THE COVER PTC...........................................................................................................................................8
COMPRESSOR AND ELECTRICAL COMPONENTS ....................................................................................................... 11
PTC AND OLP.................................................................................................................................................................... 12
OTHER ELECTRICAL COMPONENTS ............................................................................................................................. 13
SERVICE DIAGNOSIS CHART.......................................................................................................................................... 14
OPERATION PRINCIPLE & REPAIR METHOD OF ICEMAKER .................................................................................. 17-20
DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ............................................................................................... 21-33
EXPLODED VIEW & REPLACEMENT PARTS LIST ..................................................................................................... 34-39
SAFETY PRECAUTIONS
Please read the following instructions before servicing your
refrigerator.
1. Check the refrigerator for electrical faults.
2. To prevent electric shock, unplug before servicing.
3. Always check line voltage and amperage.
4. Use standard electrical components or cause your skin
to freeze and stick to the surfaces inside the freezer.
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.
- 2 -
7. Close the top door before opening the bottom door.
Otherwise, you might hit your head when you stand up.
8. When tilting the refrigerator, remove any materials on
the refrigerator, especially the glass shelves and stored
food.
9. When servicing the evaporator, wear cotton gloves.
This is to prevent injuries from the sharp evaporator
fins.
10. Service on the refrigerator should be performed by a
qualified technician. Sealed system repair must be
performed by a CFC certified technician.
Page 3
1. SPECIFICATIONS
EVAPORATOR
COLD AIR
MIXED AIR
AIR RETURN TO
EVAPORATOR
FRESH FOOD
CONTROL
FREEZER
EVAPORATOR/
EVAPORATEUR
1-1 DISCONNECT POWER CORD BEFORE
SERVICING
IMPORTANT – RECONNECT ALL
GROUNDING DEVICES
All parts of this appliance capable of conducting electrical
current are grounded. If grounding wires, screws, straps,
clips, nuts or washers used to complete a path to ground
are removed for service, they must be returned to their
original position and properly fastened.
1-2 IMPORTANT NOTICE
This information is intended for use by individuals
possessing adequate backgrounds of electrical, electronic
and mechanical experience. Any attempt to repair a major
appliance may result in personal injury and property
damage. The manufacturer or seller cannot be responsible
for the interpretation of this information, nor can it assume
any liability in connection with its use.
1-3 ELECTRICAL SPECIFICATIONS
Temperature Control (Position : MID) .................... 8-(-6)°F
Defrost Control .......................................................... 7 hrs.
Clearance must be provided at top, sides and rear of the
refrigerator for air circulation.
AT TOP ......................................................................... 1 in
AT SIDES ................................................................... 1/8 in
AT REAR ...................................................................... 1 in
- 3 -
Page 4
2. PARTS IDENTIFICATION
Pizza Nook*
CustomCube Ice maker *
CustomFit
FlexiFloor *
Digital Sensor Control
Refrigerator Light *
Chef Fresh * / Snack Pan
Shelves
Can Dispenser*
OptiBin Crisper
Base Grille
Leveling Screw (inside)
Refrigerator Door Bin
Egg Box*
Design-A-Door
Icebeam Door Cooling *
Door Cooling
Dairy Bin
Freezer Door Bin *
Freezer Light
* on some models
- 4 -
Page 5
3. DISASSEMBLY
BOLT
HINGE
HINGE COVER
GASKET
LOWER HINGE
BOLT
DOOR SWITCH
LEAD WIRE
3-1 DOOR
● Freezer Door
1. Remove the hinge cover by pulling it upwards.
2. Loosen hexagonal bolts attaching the upper hinge to the
body and lift the freezer door.
Figure 1
3. 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.
Figure 4
Figure 2
● Refrigerator Door
1. Loosen hexagonal bolts attaching the lower hinge to the
body to remove the refrigerator door only.
Figure 3
2. Pull out the door gasket to remove from the door foam
assembly.
- 5 -
Page 6
3-3 FAN AND FAN MOTOR
FAN
BRACKET
SHROUD
GRILLE
FAN MOTOR
GRILLE ASSEMBLY
DEFROST-CONTROL
ASSEMBLY
CONTROL BOX
COVER LAMP
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 4 screws
and disassemble the shroud.
4. Pull out the fan and separate the Fan Motor and Bracket.
Figure 5
3-5 LAMP
Figure 8
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).
3-4 DEFROST CONTROL ASSEMBLY
Defrost Control assembly consists of Defrost Sensor and
FUSE–M.
Defrost sensor functions to defrost automatically. It is
attached to metal side of the Evaporator and senses
Temperature. At the temperature of 162°F(72°C), it stops
the emission of heat from the Heater.
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)
Figure 6
Figure 9
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 40-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.
Figure 7
Figure 10
2. Remove the Refrigerator Control Box by pulling it
downward.
3. Disconnect the lead wire on the right position and
separate the lamp sockets.
- 6 -
Page 7
4. ADJUSTMENT
PTC STARTER
SEALED
TERMINAL
COMPRESSOR
MOTOR
C
M
S
M
3
6
5
2
S
PTC
OVERLOAD PROTECTOR
RSCR
N
L1
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 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 orimproper operation 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 BaTiO
(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.
3.
4-2-3 PTC-Applied Circuit Diagram
● Starting Method for the Motor
Figure 11
4-2-4 Motor Restarting and PTC Cooling
(1) It requires approximately 5 minutes for the pressure to
equalize before the compressor can start.
(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.
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.
- 7 -
Page 8
4-3 OLP (OVERLOAD PROTECTOR)
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)
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.
1
Figure 12
(3) Remove two Housings on upper part of Cover PTC.
(4) Take out the cover PTC from upper to lower position
like.
2
(5) Turn 45° in the direction of and take it out.
(6) Assembly in reverse order of disassembly.
- 8 -
Page 9
5. CIRCUIT DIAGRAM
BEST MODEL
- 9 -
Page 10
BETTER MODEL
- 10 -
Page 11
6. TROUBLESHOOTING
Readings OK
Open or short
1
2
3
4
5
2
5
5
3
5
4
5
5
1
43
YES
YES
Readings OK
Readings OK
Open or short
Open or short
YESYES
NO
NO
6-1 COMPRESSOR AND ELECTRIC COMPONENTS
Power Source.
Check
resistance of
Motor
Compressor.
Remove PTC-Starter
from Compressor and
measure voltage
between Terminal C of
Compressor and
Terminals 5 or 6 of PTC.
No Voltage.
Applied voltage isn't
in range of Rating
Voltage ±10%.
Check resistance
between M-C, S-C and
M-S in Motor
Compressor.
Check
resistance of
PTC-Starter.
Check resistance of
two terminals in
PTC-Starter.
Check OLP.
Check resistance of
two terminals in OLP.
(Reated Voltage
±10%)?
OLP disconnected?
Advise customer that
power supply needs to be
checked by an electrician.
Replace
Compressor.
Replace OLP.
Check connection
condition.
Reconnect.
Replace
PTC-Starter.
Replace OLP.
Check
starting state.
Check the power supply
under load.
(Compressor attempting
to re-start after being off
for 5 minutes).
Supply
voltage
rating with
±10%.
Did
compressor
start?
- 11 -
Compressor
is OK
Replace the
compressor
Page 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 13)
Separate OLP from
Compressor and check
resistance value
between two terminals
of OLP with a Tester.
(Figure 14)
Observation value is
115V/60Hz : 6.8Ω±30%
The resistance value
is 0Ω (short) or
∞ (open).
Check another
electric component.
Replace OLP.
Check another
electric component.
Replace PTCStarter
Figure 13
Figure 14
- 12 -
Page 13
6-3 OTHER ELECTRIC COMPONENTS
▼ Not cooling at all
Compressor
doesn't run.
▼ Poor cooling performance
Compressor runs
poorly.
Check for open short or
incorrect resistance readings
in the following components
a. Starting devices
b. OLP
c. Compressor coil
d. Wiring harness
Check a starting
voltage.
Check voltage at
starting devices.
Check current at
Compressor.
Cause
Short, open or broken.
Poor contact
or shorted.
Coil open or shorted.
Poor contact
or shorted.
Low voltage.
Poor or broken or
open contact.
Shorted.
Replace
indicated component.
Raise voltage.
Replace
indicated component.
Fan motor
doesn't run.
Heavy frost buildup on
EVAPORATOR.
Check rating of OLP.
Check wiring circuit.
Check Fan Motor.
Check current flow in
the following
components:
sensorFuse-M
Check current flow in
the Defrost Heater.
Lack of capacity.
Wire is open or
shorted.
Coil is shorted or
open.
Open.
Open.
Replace
indicated component.
Replace
indicated component.
Replace
Defrost Heater.
- 13 -
Page 14
6-4 SERVICE DIAGNOSIS CHART
COMPLAINTPOINTS TO BE CHECKEDREMEDY
No Cooling.
Cools poorly.
Foods in the
Refrigerator
are frozen.
Condensation or ice
forms inside
the unit.
Condensation forms
in the Exterior Case.
There is abnormal
noise.
• 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.
• Plug into the outlet.
• Set the switch to ON.
• Replace the fuse.
• If the voltage is low, correct the wiring.
• Place the unit about 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
in a firm place.
• Remove the objects.
• Fix the Drip Tray firmly in the original position.
• Place the cover in its original position.
Door does not
close well.
Ice and foods
smell unpleasant
● Other possible problems:
Check if frost forms in
the freezer.
Check the
refrigeration system.
Check the
Thermistor.
• 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.
Not
defrosting.
The system
is faulty.
The operation of
the Thermistor is
incorrect.
• 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.
Check Components
of the defrosting
circuit.
Perform sealed
system repair.
Replace the
Thermistor.
- 14 -
Page 15
6-5 REFRIGERATING CYCLE
YES
YES
▼ Troubleshooting Chart
CAUSE
PARTIALFreezer Low flowing sound ofA little higher• Refrigerant level is low due
LEAKAGEcompartment and Refrigerant is heard andthan ambient• to a leak.
LEAKAGE
COMPLETE Freezer Flowing sound of refrigerantEqual to ambient• No discharging of Refrigerant.
LEAKAGEcompartment andis not heard and frost isn'ttemperature.• Normal cooling is possible by
RESTRICTED BY DUST
PARTIALFreezer Flowing sound of refrigerantA little higher• Normal discharging of the
RESTRICTION
WHOLE
RESTRICTION
MOISTURECooling operationFlowing sound of refrigerantLower than• Cooling operation restarts
RESTRICTION
COMPRESSION
COMP-Freezer andLow flowing sound ofA little higher• Low pressure at high side
DEFECTIVE
RESSIONRefrigeratorrefrigerant is heard andambient• of compressor due to low
STATE OF
THE UNIT
Refrigerator don't frost forms in inlet only.temperature.• Normal cooling is possible by
cool normally.• restoring the normal amount of
Refrigerator don't formed.• restoring the normal amount of
cool normally.• refrigerant and repairing the leak.
compartment andis heard and frost formsthan ambient • refrigerant.
Refrigerator don't in inlet only.temperature.• The capillary tube is faulty.
cool normally.
Freezer
compartment and
Refrigerator don't cool.
stops periodically.is not heard and frost melts.ambient• when heating the inlet of the
don't cool.frost forms in inlet only.temperature.• refrigerant level.
STATE OF THE
EVAPORATOR
Flowing sound of refrigerantEqual to ambient• Normal discharging of the
is not heard and frost isn'ttemperature.• Refrigerant.
formed.
TEMPERATURE
OF THE
REMARKS
COMPRESSOR
•refrigerant and repairing the leak.
temperature.• capillary tube.
NO COMP-No compressingFlowing sound of refrigerantEqual to ambient• No pressure in the high
RESSIONoperation.is not heard and there istemperature.• pressure part of the
no frost.• compressor.
▼ Leakage Detection
● 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.
Check if compressor
runs.
Frost formed normally
Moisture Clog
Faulty
Compressor.
Check Compressor
Check if frost
forms in
Evaporator.
Normal amount
Clogged by dust.Gas leakage.
No frost
or frost forms
in inlet only
Observe the discharged
amount of Refrigerant.
Inject refrigerant in compressor
and check cooling operation.
Frost formed normally
Check if oil
leaks.
None or too much
(Find the leak and repair it)
- 15 -
Page 16
▼ General Control of Refrigerating Cycle
NO.ITEMSUNITSTANDARDSPURPOSESREMARKS
Pipe and
1
piping system
opening time
Welding
2
N
2
3
parts
Refrige-
4
ration
Cycle
sealed
Evacuation
time
Vacuum
degree
Vacuum
Vacuum
piping
Min.
Nitrogen
pressure
Confirm
N
2 leak
Min.
Torr
EA
EA
Pipe: within 1 hour.
Comp: within 10 minutes.
Drier: within 20 minutes.
Weld under Nitrogen
atmosphere.
(N
2 pressure:
0.1~0.2 kg/cm
2
)
Confirm the sound of
pressure relief when
removing the rubber cap.
Sound: usable
No sound: not usable
More than 40 minutes
Below 0.03 (ref)
High and low pressure sides
are evacuated at the same
time for models above 200 l.
Use R-134a manifold
exclusively.
To protect
moisture
penetration.
To protect oxide
scale formation.
To protect
moisture
penetration.
To remove moisture.
To protect mixing
of mineral and
ester oils.
The opening time should be reduced
to a half of the standards during rain
and rainy seasons (the penetration of
water into the pipe is dangerous).
- Refer to repair note in each part.
- R-134a refrigerant is more
susceptible to leaks than R-12 and
requires more care during welding.
-
Do not apply force to pipes before and
after welding to protect pipe from cracking.
- In case of evaporator parts, if it doesn't
make sound when removing rubber
cap, blow dry air or N
2 gas for more
than 1 min. and than use the parts.
Note: Only applicable to the model
equipped with reverse flow
protect plate.
Vacuum efficiency can be improved
by operating compressor during
evacuation.
The rubber pipes for R-12 refrigerant
will be melted when they are used for
R-134a refrigerant (causes of leak.)
Refrigerant
5
weighing
Drier
6
replacement
Leak check
7
Pipe
coupler
Outlet
(Socket)
Plug
EA
EA
Use R-134a manifold
exclusively.
R-134a manifold exclusively.
R-134a manifold exclusively.
Use R-134a exclusively.
Weighing allowance: ±5g
Note: Winter: -5g
- Do not use soapy water for
check. It may be sucked
into the pipe by a vacuum.
To protect R-12
refrigerant mixing.
To protect R-12
refrigerant mixing.
To protect R-12
refrigerant mixing.
Do not mix with
R-12 refrigerant.
To remove the
moisture from
pipe inside.
Defect in
refrigerant leak
area.
- Do not weigh the refrigerant at too
hot or too cold an area.
(77°F [25°C] is adequate.)
- Make Copper charging canister
(Device filling refrigerant)
Socket: 2SV Plug: 2PV R-134a
Note: Do not burn O-ring (bushing)
during welding.
- Check for an oil leak at the refrigerant
leak area. Use an electronic leak
detector if an oil leak is not found.
- The electronic leak detector is very
sensitive to halogen gas in the air. It
also can detect R-141b in urethane.
Practice many times before using this
type of detector to avoid false readings.
- 16 -
Page 17
7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICE MAKER
• Adjusts EJECTOR to Start Position with power on.
Power On
Start Position
Ice Making
Mode
Harvest
Mode
Park Position
Fill
Test Mode
• Waits until water becomes cold after starting
ice-making operation.
• Runs MOTOR to drop ice on tray from ICE BIN.
• Performs Ice Making Mode after supplying water by operating
SOLENOID in ICE VALVE.
• With the detect lever, checks if the ICE BIN is full.
• To operate LINE and SERVICE, press and hold the Fill Key
for 3 seconds. The ice maker will run through 3 stages:
Harvest Fill Icemaking.
7-1 OPERATION PRINCIPLE
7-1-1 Operation Principle of Icemaker
1. Turning the icemaking stop switch off (O) stops the icemaking function.
2. Setting the icemaker switch to OFF and then turning it back on will reset the icemaker control.
- 17 -
Page 18
7-2 CONTROL METHOD ACCORDING TO FUNCTIONS
Heater
on
off
on
0V
5V
off
30 sec.
10 sec.
Motor
Hall IC
Harvest mode
end poing
2 ms
Ice-making sensor temperature is 50°F(10˚C) or more
Max. 18 minutes
After detect LEVER rises
7-2-1 Start Position
1. After POWER OFF or Power Cut, check EJECTOR's position with MICOM initialization to restart.
2. Control Method to check if it's in place:
(1) EJECTOR is in place,
- The ejector must be in the park position before a new cycle can be initiated.
(2) EJECTOR isn't in place:
A. If there is no ice formed in the ice maker, it should take approximately 2 minutes for the ejector blades to cycle through
the harvest mode and return to the park position.
B. If there is ice formed in the ice maker, it can take up to 18 minutes for the ejector blades to cycle through the
harvest mode and return to the park position.
7-2-2 Ice Making Mode
1. The Ice Making Mode starts once the ejector is in the park position and the ice maker mold is filled with water.
2. The Ice Making Mode is terminated when the ice maker sensor reaches 19°F(-7°C). This may take between 1 and 4
hours.
7-2-3 Harvest Mode
1. The Harves mode is initiated when the temperature is satisfied with the shut-off arm in the down position.
2. Once the Harvest mode is initiated, the heater is operated for 30 seconds.
3. After 30 seconds, the ejector blades are operated. (Pin 10 of micom from the hall sensor will read 5V.)
4. Once the ejector blades have reached the park position and the hall sensor is reading 0V, water fill will be initiated.
NOTE : If no movement is detected from the shut-off arm (detect lever), that a Harvest mode will be attempted every 2
hours.
<fig1. Harvest mode process>
- 18 -
Page 19
7-2-4 Fill / Park Position
1. Once a normal harvest mode has been completed, the water solenoid will be activated.
2. The amount of water is adjusted by pressing the water supply control Switch. This changes the time allowed for fill as
illustrated in the chart.
Water supply amount TABLE
STAGETIME TO SUPPLYINDICATIONSREMARKS
1
2
3
4
5
NOTE : Below is an example used by another vendor as an explanation of what is taking place.
6 sec.
7 sec.
8 sec.
9 sec.
10 sec.
The water amount will vary depending
on the water control Switch setting, as
well as the water pressure of the
connected water line.
- 19 -
Page 20
7-2-5 Function TEST
This is a compulsory operation for TEST, SVC, cleaning, etc. It is operated by pressing the water supply control KEY for 3 seconds.
1.
2. It operates in the Icemaking mode, but not in the Ice-Removing mode or water supply process. (If there is an ERROR, it
can only be checked in the TEST mode.)
3. If the water supply control KEY is pressed for 3 seconds in the Ice-Making mode (no matter what condition the IceMaking tray is in) the Ice-Removing operation starts immediately. Water is not yet frozen, so water is poured instead of
ice. If the control doesn’t operate normally in the TEST mode, check and repair as needed.
4. After water is supplied, the normal CYCLE is followed: ice making → Harvest → Fill → Park position.
5. When Stage 5 is completed in the TEST mode, minimize MICOM in 5 seconds, the time needed to supply water resets tothe previous status in the TEST mode.
Diagnosis TABLE
STAGEITEMSINDICATORREMARKS
1
2
3
4
5
6
HEATER
MOTOR
HALL IC (detection
of position) I
VALV E
HALL IC (detection
of full-filled Ice) II
reset
Mark previous status on TEST mode
7-3 DEFECT DIAGNOSIS FUNCTION
7-3-1 ERROR CODES shown on Ice Maker water supply control panel
Five seconds after heater starts, heater will
go off if temperature recorded by sensor is
50°F(10°C) or lever is in up position.
Five seconds after heater starts, you can
confirm that motor is moving.
You can confirm Hall Ic detection of position.
Two seconds after detection of initial
position, you can confirm that valve is on.
You can check whether hall is sensing Full
ice condition. (If there is a full-filled error, the
fifth LED is not on.)
Five seconds after fifth stage is completed,
the Icemaker reset at initial status.
NODIVISIONINDICATORCONTENTSREMARKS
1
2
3
ERROR indicators in table can be checked only in TEST mode.
Normal
Ice-Making
Sensor
malfunction
Ice Maker Kit
malfunction
Mark time to
supply
Open or short-circuited wire
When ejector blades don’t reach
park position over 18 minutes
since Harvest Mode starts.
None
Display switch
operates properly
Make sure that the wire
on each sensor is
connected.
Defects of
HALL IC/MOTOR/
HEATER/RELAY
- 20 -
Page 21
8. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM
Sears Best Model
Control range : 32°F ~ 47°F
0°C ~ 8°C
Control range : -6°F ~ 8°F
-21°C ~ -13°C
Sears Better Model
FREEZER
COLDER WARMER
°F/°C
0°F IS RECOMMENDED
TEMPERATURE
REFRIGERATOR
LOCKCOLDER WARMER
HOLD 3 SECONDS
37°F IS RECOMMENDED
TEMPERATURE
FREEZER
OFF
TEMPERATURE
1234567
REFRIGERATOR
LOCKADJUST
HOLD 3 SECONDS
4 IS RECOMMENDED
TEMPERATURE
WARMERCOLDER
1234567
ADJUST
4 IS RECOMMENDED
WARMERCOLDER
8-1 FUNCTION
8-1-1 Function
1. When the appliance is plugged in, it is set to "37 °F" for the Refrigerator and "0 °F" for the Freezer (set to "4" for
Refrigerator and "4" for Freezer).
You can adjust the Refrigerator and the Freezer control temperature by pressing the COLDER button or the COLD button.
2. When the power is initially applied or restored after a power failure, it is automatically reset to "37 °F" and "0 °F" (set to
"4" and "4").
8-1-2 How to Change the Temperature Mode to °F / °C
1. The setting temperature mode can be changed to °F / °C by pressing the " °F / °C " button.
2. The initial setting is on °F. When the mode is changed the LED lights come on.
8-1-3 Key Lock
1. The key pads can be locked by pressing and holding the KEY LOCK button for 3 seconds.
2. The lock light will be displayed and the key pads will be inoperable.
3. Pressing and holding the KEY LOCK button for 3 seconds will reactivated the key pads.
8-1-4 OFF Function
1. To turn off the Best model, press and hold the °F/°C button for 3 seconds. To turn off the Better model, press and hld the
OFF key for 3 seconds.
2. In the Off mode, the Best model will display OFF in the control panel. The OFF light will be displayed on the Vetter model.
3. To cancel the OFF function, press the same keys and hold for 3 seconds.
- 21 -
Page 22
8-1-5 Alarm for Open Door
ClosedOpenClosedOpen
3 Times3 Times3 Times3 Times
Closed
Within 1 min.1 min.
30 sec30 sec30 sec
Freezer Door
or Refrigerator
Door
Buzzer
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 0.5 seconds. These tones repeat every 30
seconds.
3. The alarm is cancelled when the freezer or the refrigerator is closed while the buzzer sounds.
8-1-6 Buzzer Sound
When the button on the front Display is pushed, a "Ding~" sound is produced.
8-1-7 Defrost Cycle
1. A defrost cycle will be initiated after 4 hours of accumulated compressor run time after the initial power up or a power
failure.
2. After the initial defrost, the defrost cycle is initiated after 7 hour of accumulated compressor run time.
3. The defrost cycle will be terminated once the defrost sensor reaches 50°F(10°C).
8-1-8 Electrical Parts Operates in Orders
Electrical parts such as COMP, defrost heater, freezer FAN, etc. operate 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.
OPERATINGORDERS
Temperature of Defrost
Sensor is 113°F(45°C) or
more (when unit is newly
Initial power on
purchased or when moved)
Temperature of defrost
sensor is lower than
113 °F(45°C) (when power
cuts, SERVICE)
Reset to normal operation
from TEST MODE
POWER
ON
POWER
ON
in 1/2 second
Total load
OFF
in 1/2 second
COMP
in 1/2 second
ON
in 1/2 second
Defrost
heater ON
COMP
in 1/2 second
ON
in 7 minute
COMP
ON
Freezer FAN
in 10 second
Freezer FAN
ON
in 1/2 second
ON
Defrost
heater OFF
Freezer FAN
ON
- 22 -
Page 23
8-1-9 Defect Diagnosis Function
Defect code signsDefect code signs
FREEZER
COLDER WARMER
°F/°C
0°F IS RECOMMENDED
TEMPERATURE
REFRIGERATOR
LOCKCOLDER WARMER
HOLD 3 SECONDS
37°F IS RECOMMENDED
TEMPERATURE
Defect code Panel
FREEZER
OFF
TEMPERATURE
1234567
REFRIGERATOR
LOCKADJUST
HOLD 3 SECONDS
4 IS RECOMMENDED
TEMPERATURE
WARMERCOLDER
1234567
ADJUST
4 IS RECOMMENDED
WARMERCOLDER
1. Defect diagnosis functions are easy SVC when defects occur which can affect product performance.
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 DISPLAY as temperature LED, and the other LED turns off.
-Show ERROR CODE on Refrigerator Temperature Panel and Freezer Temperature panel.
NOITEM
Freezer sensor
1
malfunctions
ERROR CODE
REF. TEMP. PANELFRZ. TEMP. PANEL
Er
Refrigerator
2
3
4
5
sensor
malfunctions
Defrost sensor
malfunctions
Room
Temperature
sensor
malfunctions
Defrosting
malfunctions
Er
Er
On LED CHECK mode
ERROR CODE sign
Er
Er
ERROR CODE on Freezer Temperature panel
NOITEM
F1 F2 F3 F4 F5 F6 F7
DEFECT SIGNS
FS
rS
dS
rT
dH
CONTENTSREMARKS
Open or short-circuited wire
Open or short-circuited wire
Open or short-circuited wire
Open or short-circuited wire
2 hours after defrosting
starts, the sensor is not
above 50°F(10°C)
Temperature FUSE cuts off,
HEATER cuts off, DRAIN is
clogged, HEATER starts,
RELAY malfunctions
CONTENTSREMARKS
Inspect
*
connecting wires
on each sensor
:ON :OFF
Freezer sensor
1
2
3
malfunctions
Refrigerator sensor
malfunctions
Defrost sensor
malfunctions
Room
4
Temperature
sensor
malfunctions
5
Defrosting
malfunctions
On LED CHECK mode
Open or short-circuited wire
Open or short-circuited wire
Open or short-circuited wire
Open or short-circuited wire
- 23 -
2 hours after
defrosting starts,
the sensor is not
above 50°F(10°C)
Inspect
*
connecting wires
on each sensor
Temperature FUSE cuts off,
HEATER cuts off, DRAIN is
clogged, HEATER starts,
RELAY malfunctions
Page 24
8-1-10 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 button is on the main PCB of the refrigerator (Test S/W). The test mode will be cleared in 2 hours regardless of
the type of test mode.
3. While in the test mode, the function control button will not operate, though 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 even if the test button is pushed.
MODEMANIPULATIONCONTENTSREMARKS
TEST1
TEST2
Reset
Push the test button
once.
Push the test button
once while in
TEST MODE 1.
Push the test button
once while in
TEST MODE 2.
1. Continuous operation of the COMP
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 default setting
Reset if the
temperature of the
Defrosting sensor is
50°F(10°C) or more.
The compressor will
Start after a 7-minute
delay.
- 24 -
Page 25
8-2 PCB FUNCTION
8-2-1 Power Circuit
1. Power is supplied to the control board at pins 1 and 3 of connector #1.
- 25 -
Page 26
8-2-2 Load / Buzzer Drive & Open Door Detection Circuit
1. Load Drive Condition Check
To measure outputs of the control board, check voltages between the pins for the following components:
CircuitPin NumberPin NumberOutput Voltage
CompressorCon2 pin7Con1 pin1115 VAC
Condenser fanCon2 pin7Con1 pin1115 VAC
Evaporator fanCon2 pin5Con1 pin1115 VAC
Defrost heaterCon2 pin3Con1 pin1115 VAC
F,R-lampCon2 pin1Con1 pin1115 VAC
NOTE: When the door of the freezer/refrigerator is left open for 7 minutes or longer, the lamp of the freezer/refrigerator turns
off automatically.
- 26 -
Page 27
2. Open Door Circuit (Door Monitor Circuit)
Freezer or RefrigeratorMeasurement between pins 4 and 3 at Con 5
Both Closed0 volts
One door open5 volts
- 27 -
Page 28
8-2-3 Temperature Sensor Circuit
Voltage supplied to each sensor wil range between 0.5 volts -22°F(-30°C) and 4.5 volts 122°F(50°C) depending upon the
temperature in the compartments. A measurement of 0 volts indicates a short in the sensor circuit. A measurement of 5
volts indicates an open in the sensor circuit.
- 28 -
Page 29
8-2-4 Motor Damper Circuti
A reversible DC motor is used to open and close the damper.
To open the damper, push test button once.
To close the damper, push test button twice.
8-2-5 Damper Heater
* The damper heater is attached to the baffle and always will be on if the unit is powered on. The damper heater uses
12VDC.
- 29 -
Page 30
8-2-6 Key Button Input & Display Light On Circuit
LED CHECK MODE: When the COLDER(ADJUST) button in the refrigerator temperature control and the
COLDER(ADJUST) 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.
Best ModelBetter Model
- 30 -
Page 31
8-3 RESISTANCE SPECIFICATION OF SENSOR
TEMPERATURE RESISTANCE OF FREEZERRESISTANCE OF REFRIGERATOR
- 20 ˚C (-4 °F)22.3 KΩ77 KΩ
- 15 ˚C (5 °F)16.9 KΩ60 KΩ
- 10 ˚C (14 °F)13.0 KΩ47.3 KΩ
- 5 ˚C (23 °F)10.1 KΩ38.4 KΩ
0 ˚C (32 °F)7.8 KΩ30 KΩ
+ 5 ˚C (41 °F)6.2 KΩ24.1 KΩ
+ 10 ˚C (50 °F)4.9 KΩ19.5 KΩ
+ 15 ˚C (59 °F)3.9 KΩ15.9 KΩ
+ 20 ˚C (68 °F)3.1 KΩ13 KΩ
+ 25 ˚C (77 °F)2.5 KΩ11 K Ω
+ 30 ˚C (86 °F)2.0 KΩ8.9 KΩ
+ 40 ˚C (104 °F)1.4 KΩ6.2 KΩ
SENSOR& DEFROST SENSOR
+ 50 ˚C (122 °F)0.8 KΩ4.3 KΩ
• The resistance of the SENSOR has a ±5% common difference.
• Measure the resistance of the SENSOR after leaving it for over 3 minutes in the measuring temperature.
This delay is necessary due to sensor response speed.
• Measure the F-SENSOR, SUPER FROST SENSOR, R1, R2-SENSOR after disconnect CON5 of PWB ASSY, MAIN.
- 31 -
Page 32
Not defrosting
Not cold enough
Not Cooling
not operating
correctly
Electronic Display
COMPLAINT
8-4 TROUBLESHOOTING
1. Freezer has too
much frost
4. Damper not opening or internal air flow blocked
5. Sensor not operating properly
6. Door not sealing
7. Evaporator Frosted up
1. Open in defrost circuit
2. Defrost sensor not operating correctly
3. Defrost drain clogged
8. Sealed System related problem
2. Display on
compressor is
operating
1. Condenser fan motor not operating
2. Condenser coils blocked
3. Evaporator fan motor not operating
operating
1. Display on but
compressor not
1. Compressor not operating
2. Open in compressor circuit
2. Partial or
abnormal display
1. Supply voltage not within specifications
2. Open in wiring harness from PWB board
3. Open in door monitor switch circuit
1. No Display at all
SYMPTOMPOSSIBLE CAUSESSOLUTION
1. Supply voltage not within specifications
2. Open in wiring harness from PWB board
1. Check defrost heater and circuit using Test Key
2. Check sensor
3. Check drain
7. Check defrost circuit components
wiring, etc.
1. Check condenser fan motor and wiring circuit
2. Check air flow across condenser
3. Check evaporator fan motor and wiring circuit
4. Check damper motor circuit
5. Check refrigerator and freezer sensors
6. Check for proper door esal
1. Check supply voltage to refrigerator
2. Check for open on OLP, PTC, compressor,
1. Check for compressor operation by using the test
key on main circuit board
2. Check wiring and connectors to and from PWB
board
3. Check door monitor circuit
1. Check supply voltage to refrigerator
2. Check wiring and connectors to PWB board
- 32 -
Page 33
8-5 MAIN PWB ASSEMBLY AND PARTS LIST
8-5-1 Main PWB Assembly
connector 1
connector 2
connector 5
connector 6
connector 4
connector 3
- 33 -
Page 34
9. EXPLODED VIEW & REPLACEMENT PARTS LIST
106A
106A
315A
401A
304A
501A
411A
410G
501F
S01
309A
318A
308A
S07
314A
307A
312A
317A
S06
S09
310A
327A
103A
105A
301A
283E
120A
103B
328A
145B
145A
282H
B02
S13
282B
406B
418A
281A
B01
281B
103C
305B
305B
305C
305C
B03
S19
S17
S18
S18
175A*
120B
503B
113A
503D
503C
503D
158C
113D
409B
409B
113B
113C
158A
S16
S38
105F
S10S10
B04
323B
329C
420A
319A
S08
319C
S14
612A
610A
S14
282E
S02
S05
S04
283B
S15
104B
S14
S14
104B
CASE PARTS
CAUTION: Use the part number to order part, not the position number.
- 34 -
Page 35
FREEZER PARTS
405C
404A
409A
158E
405A
S20
330B
S21
332A
408A
149A
149B
143A*
S14
284C
284A
329A
116A
S22
315B*
315B*
136A*
143B*
CAUTION: Use the part number to order part, not the position number.
- 35 -
Page 36
REFRIGERATOR PARTS
170A
128A
146A*
147C*
147B
147A*
147D*
141D
149C
141E
149E*
142B
142E
S24
S24
142D
141B
128B
5
128C*
128D*
278C*
278G*
141C
141A
141C
141A
141B
S24
140D
140A
5
140B
140E
S24
S24
160B
167B
161A
151A
155B
151A
161A
160B
151C
CAUTION: Use the part number to order part, not the position number.
▲
, * : On some models
- 36 -
Page 37
DOOR PARTS
233A
203A
200A
201A
231A
281D
281D
205B
205D
5
205A
*
205A
205C
*
205C
281E
241A
241B
241E
241C
241D
237A
*
281E
205B
*
244A
*
S25
*
S25
*
244B
*
S25
*
212A
*
S25
*
S25
*
S25
*
210A
S26
210B
201A
281D
281E
244B
*
212A
*
607A
*
607A
*
244C
*
243A
283F
231A
281D
281E
S27
244B
*
244A
*
607A
*
607A
*
244C
*
230A
S25
*
S25
*
S25
*
S25
*
CAUTION: Use the part number to order part, not the position number.
▲
, * : On some models
- 37 -
Page 38
ICE MAKER PARTS
131A
600A
616E
623A
S30
622A
616D
619A
602A
S29
S31
S28
CAUTION: Use the part number to order part, not the position number.
- 38 -
Page 39
ICE MAKER PARTS (LOC#600A)
501G
120H
629B
629C
629D
629E
613B
275C
613A
628E
404X404Y404Z
405D
628C
276A
510A
125D
S32
S33
S34
S35
S36
629A
280E
501B
628A
628B
273A
275D
406D
S37
S36
NON SERVICEABLE PARTS
- 39 -
Page 40
P/No. 3828JL8008A MARZO, 2003 Printed in México
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