LG LSC26945TT User manual

CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
REFRIGERATOR
SERVICE MANUAL
MODEL: LSC26945TT
LSC26945SW
COLOR: SUPER WHITE
TITANIUM
http://biz.lgservice.com

WARNINGS AND PRECAUTIONS FOR SAFETY ................................................................................................................ 3
SPECIFICATIONS................................................................................................................................................................... 4
PARTS IDENTIFICATION ....................................................................................................................................................... 5
HOW TO INSTALL THE REFRIGERATOR ............................................................................................................................ 6
HOW TO ADJUST DOOR HEIGHT...................................................................................................................................... 6
FILTER ................................................................................................................................................................................. 7
HOW TO CONTROL THE ICEMAKER WATER SUPPLY.................................................................................................... 8
MICOM FUNCTION .............................................................................................................................................................. 10
EXPLANATION OF MICOM CIRCUIT .................................................................................................................................. 24
EXPLANATION OF PWB CIRCUIT .....................................................................................................................................24
PWB PARTS DIAGRAM AND LIST.....................................................................................................................................43
PWB CIRCUIT DIAGRAM ...................................................................................................................................................47
ICE MAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR ...........................................................................49
WORKING PRINCIPLES.................................................................................................................................................... 49
FUNCTION OF ICE MAKER .............................................................................................................................................. 50
ICE MAKER TROUBLESHOOTING................................................................................................................................... 53
ICE MAKER CIRCUIT .........................................................................................................................................................54
CIRCUIT................................................................................................................................................................................ 55
TROUBLE DIAGNOSIS........................................................................................................................................................ 56
TROUBLESHOOTING ....................................................................................................................................................... 56
FAULTS .............................................................................................................................................................................. 66
COOLING CYCLE HEAVY REPAIR ................................................................................................................................... 83
HOW TO DEAL WITH CLAIMS.......................................................................................................................................... 90
HOW TO DISASSEMBLE AND ASSEMBLE....................................................................................................................... 95
DOOR................................................................................................................................................................................. 95
HANDLE ............................................................................................................................................................................. 96
FAN SHROUD GRILLE ...................................................................................................................................................... 97
ICEMAKER ASSEMBLY..................................................................................................................................................... 97
DISPENSER....................................................................................................................................................................... 98
EXPLODED VIEW .............................................................................................................................................................. 100
REPLACEMENT PARTS LIST ........................................................................................................................................... 107
CONTENTS
- 2 -

Please observe the following safety precautions to use the
refrigerator safely and correctly and to prevent accident or
injury when servicing.
1. Be careful of an 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, please wait for more than
five minutes after power cord was disconnected from the
wall outlet.
3. Please check if the power plug is pressed by the
refrigerator against the wall. If the power plug was
damaged, it could cause fire or electric shock.
4. If the wall outlet is overloaded, it may cause a fire.
Please use a dedicated circuit for the refrigerator.
5. Please make sure the outlet is properly grounded.
Particularly in a wet or damp area.
6. Use standard electrical components.
7. Make sure hooks are correctly engaged.
Remove dust and foreign materials from the housing
and connecting parts.
8. Do not fray, damage, run over, kink, bend, pull out, or
twist the power cord.
9. Please check for evidence of moisture intrusion in the
electrical components. Replace the parts or mask with
insulation tape if moisture intrusion was confirmed.
10. Do not touch the icemaker with hands or tools to
confirm the operation of geared motor.
11. Do not suggest that customers repair their refrigerator
themselves. This work requires special tools and
knowledge. Non-professionals could cause fire, injury,
or damage to the product.
12. Do not store flammable materials such as ether,
benzene, alcohol, chemicals, gas, or medicine in the
refrigerator.
13. Do not put anything on top of the refrigerator,
especially something containing water, like a vase.
14. Do not put glass bottles with full of water into the
freezer. The contents will freeze and break the glass
bottles.
15. When you scrap or discard the refrigerator, remove the
doors and dispose of it where children are not likely to
play in or around it.
WARNINGS AND PRECAUTIONS FOR SAFETY
- 3 -

SPECIFICATIONS
- 4 -
724 mm (281/2in.)
1004 mm (391/2in.)
908 mm (3911/16 in.)
779 mm (305/8in.)
829 mm (325/8in.)
897 mm (355/16 in.)
1261 mm (495/8in.)
1741.5 mm (681/2in.)
1746.5 mm (683/4in.)
1771 mm (6911/16 in.) 1771 mm (6911/16 in.)
1. Ref No. : LSC26945TT/ LSC26945SW
ITEMS SPECIFICATIONS
DIMENSIONS 908
X 896 X 1771 mm
W
X D X H (3511/16 X 355/16 X 6911/16 in.)
NET WEIGHT 149 kg (328.5 lbs.)
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 (185g) (61/2oz.)
LUBRICATING OIL FREOL @10G (320 cc)
ITEMS SPECIFICATIONS
DRIER MOLECULAR SIEVE XH-7
CAPILLARY TUBE ID Ø0.83
FIRST DEFROST 4 - 5 Hours
DEFROST CYCLE 13 - 15 Hours
DEFROSTING DEVICE Heater, Sheath
ANTI-SWEAT HEATER Dispenser Duct Door Heater
Dispenser Heater
ANTI-FREEZING HEATER Damper Heater
FREEZER LAMP 40W (1 EA)
REFRIGERATOR LAMP 40W (4 EA)
DISPENSER LAMP 15W (1 EA)
Front View Top View

1. Ref No. : LSC26945TT/ LSC26945SW
PARTS IDENTIFICATION
- 5 -
Frame Display
Dispenser Lamp
Ice & Water
Dispenser Button
PWB Cover
Water Tubes

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

2. Filter
Replace the filter when the indicator light comes on or the
performance of the icemker or water dispenser decreases
noticeably.
After changing the water filter cartridge, reset the water
filter status display and indicator light by pressing and
holding the BUTTON for 3 seconds.(page 18)
1. Remove the old cartridge.
Twist the knob of the cartridge counter clockwise.
When the cartridge is removed, you will feel it click .
Pull out the cartridge.
NOTE: There will be some water(25cc) in the filter
cartridge. Some spilling may occur. Catch it in a
bowl or towel.
2. Replace with a new cartridge.
Take the new cartridge out of its packaging and remove
protective cover from the o-rings.
With cartridge knob in the vertical position, push the new
filter cartridge into the cover until it stops.
If you can’t turn the filter from side to side, it isn’t fully
inserted. Push it in firmly and twist it into place. You will
hear the snap when it clicks into place.
Using the handle, twist the cartridge clockwise about 1/4
turn.
3. Flush the Water System After Replacing Filter Dispense
water through the water dispenser for 3 minutes to
purge the system.
There may be a little air in the line, causing noise or
hissing. Run the water at the dispenser until the hissing
stops to purge the air from the system.
NOTE: - To purchase replacement water filter cartridges,
visit your local appliance dealer or part distributor.
- You can also visit our website :
www.lgappliances.com or call 1-877-714-7481.
HOW TO INSTALL REFRIGERATOR
- 7 -

3. How to Control the Amount of Water Supplied to Icemaker.
3-1. Confirm the amount of water supplied to the icemaker.
1. Pull out the ice bin shelf 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.
It may damage the refrigerator or hurt your hands.
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) and 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 spilt water and throw away 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)
* 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
Ice maker
Too much
Too little
Optimum level

3-2. Control the amount of water supplied to the icemaker.
Caution : •Please 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 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 water pressure (city water pressure).
3) If ice cube is too small, increase the water supplying time. This happens when too small water is supplied into the ice tray.
4) If ice cube sticks together, decrease the water supplying time. This happens when too much water is supplied into the ice tray.
Caution : When adjusting the amount of water supplied, adjust step by step. 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 -
(+) Driver
1
ON
Switch ON
Switch OFF 23
Confirm the amount
of water
Optimum level
* 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 switch is on the main
PWB.
GR-L267BV(T)R GR-L267BV(T)RA, GR-L267BV(T,S)PA
No DIP SWITCH SETTING
S1 S2
DIP SWITCH SETTING
S1 S2 S3
1
2
3
4
5
6
7
8
OFF OFF 6.5 SEC
ON OFF 5.5 SEC
OFF ON 7.5 SEC
ON ON 8.5 SEC
OFF OFF OFF 6.5 SEC
ON OFF OFF 5.5 SEC
OFF ON OFF 6 SEC
ON ON OFF 7 SEC
OFF OFF ON 7.5 SEC
ON OFF ON 8 SEC
OFF ON ON 9 SEC
ON ON ON 10 SEC
WATER
SUPPLY TIME
WATER
SUPPLY TIME
REMARKS

1. Monitor Panel
1-1. LSC26945TT/ LSC26945SW
MICOM FUNCTION
- 10 -
Dispenser selection
button
Express Freezer/Jet Freezer
function selection button
Dispenser and button
Lock button
Dispenser Lamp On/Off button/
Filter status display RESET button
Temperature adjustment button
for refrigerator compartment
Temperature adjustment button
for freezer compartment

1-2. Display Second Function
1. Buzzer sound mute Mode
The buzzer sound is set to OFF.
It activates by sounding the recognition sound of “Ding~” after pressing and holding “Express FRZ” button more than 5
seconds. It inactivates when resetting the mode power.
2. Display Power saving Mode
It places display in standby mode until door is opened.
Press “Freezer” and “Express FRZ” buttons simultaneously to turn all leds become ON and then OFF with the recognition
sound of “Ding~” after 5 seconds. (Be sure not to press only one button to work.)
Once the mode activates, the display is always OFF. Until door is opened or display button is pressed. When 30 seconds
has elapsed after closing door or pressing button, the display turns OFF. To deactivate this mode is same as the
activation methods. The mode inactivates when resetting the power.
3. Change Display Degree to Centigrade Mode from Fahrenheit Mode
To change temperature display from Fahrenheit to Celsius press and hold “FREEZER” and “REFRIGERATOR” buttons
simultaneously for more than 5 seconds. Do the same to convert back to Celsius.
4. Exhibition Mode
This function is available when exhibiting a refrigerator in the shopping moll.
Function is inserted with recognition sound “Ding ~” if pressing both the “Express FRZ” button and the “REFRIGERATOR”
button at the same time for more than 5 seconds. If function is inserted, all basic refreezing functions at the R/F room and
the Storage room (COMP, F-FAN, C-FAN) turns off and the display normally operates. However, the dispenser function
normally operates.
The DEMO stops if pressing the button during DISPLAY DEMO, DEMO stops and the display normally operates but
performs DEMO operation again if not pressing the button again for more than 30 seconds (DEMO: Display scenario
when using the display).
Release method is same as input method.
The mode is released if power is reset.
MICOM FUNCTION
- 11 -
Display Power
saving Mode
Exhibition Mode
Change Display Degree from
Fahrenheit to Centigrade Mode
Buzzer sound
mute Mode

2. Description of Function
2-1-1. Function of Temperature Selection
* The temperature can vary ±5°F (±3°C) depending on the load condition.
❉Whenever pressing button, setting is repeated in the order of COLD ➝COLDER ➝COLDEST ➝COOL ➝COLDER.
•The actual inner temperature varies depending on the food status, as the indicated setting temperature is a target
temperature, not actual temperature within refrigerator.
•Refrigeration function is weak in the initial time. Please adjust temperature as above after using refrigerator for minimum
2~3 days.
•Freezer Notch is fixed COLDER unconcerned with display Notch during Icemaking Control Mode and Icemaker Stop
switch is selected with ON.
2-1-2. Outside temperature display function
1. The ambient temperature sensor is located under the upper right hinge cover. This sensor reads the temperature of the
room and displays it in the upper right corner of the display.
2. The ambient temperature is displayed between 16 °F and 120 °F. Outside of that range, the display will show Er.
3. Since the ambient temperature sensor is located at the hinge, its reading may differ from other thermometers in the room.
Division Power Initially On 1st Press 2st Press 3th Press 4th Press
Temperature
Control COLD COLDER COLDEST COOL COOLER
Freezer Control -2 °F -5 °F -8 °F7°F1°F
Refrigeration 37 °F 34 °F 32 °F 46 °F 41 °F
Control
MICOM FUNCTION
- 12 -

2-1-3. Lock function (dispenser and display button lock)
1. In power application of refrigerator, the LOCK text is turned off at the right side of lock graphic of display with the lock
replease status.
2. If desiring to lock the dislay the dispenser and control panel, push on the LOCK button more than 3 seconds. LOCK is
turned on at the right side of lock graphic of display with lock status.
3. The buzzer sound and control panel and dispenser function is not performed even if pressing display button other than
lock key in the lock status.
4. If desiring to release the lock status and pressing the lock button more than 3 seconds. LOCK text is turned off at the right
side of lock graphic of display with the lock release status.
2-1-4. Filter condition display function
1. There is a replacement indicator light for the water filter cartridge on the dispenser.
2. Water filter needs replacement once six months.
3. Water filter light and FILTER RESET HOLD 3SECS text turn on to tell you need to replace the filter soon.
4. After replacing the filter, press and hold the lock button more than 3seconds.
Then water filter light and FILTER RESET HOLD 3SECS text turn off with reset status.
LOCK
DISPENSER & BUTTON
3 SECS
LOCK
DISPENSER & BUTTON
3 SECS
LOCK LOCK again
LED
MICOM FUNCTION
- 13 -

2-2. Dispenser use selection
You can select water or ice.
❉Select WATER, CRUSHED ICE, or CUBED ICE by pressing the button as
you desire.
❉Use your cup to press lightly on the actuator.
•Each graphic is indicated for the selected function.
•You’ll hear a CLICK when the ice door closes 5 seconds after ice is dispensed.
REFERENCE : Hold your cup in the dispenser for a few seconds after dispensing
ice or water to catch the last few drops or pieces of ice.
2-3. ICE PLUS Freezing/JET Freezing Selection
Select this function to expedite freezing.
•Press the button to cycle to toggle between the settings.
•The arrow mark graphic remains at the ON status after flickering 4 times when selecting Special Refrigeration ICE PLUS
FRZ or JET FRZ.
•ICE PLUS freezer or JET freezer function automatically turns off after a set time.
•Jet Freezing : Not applicable to all models.
2-4. Dispenser Light
•The dispenser light function is repeated following below whenever pressing LIGHT/FILTER button.
•Auto mode is automatic control of the dispender light by using the light sensor.
DISPENSER
Pressing
Switch
LED (LSC26945SW)
LCD (LSC26945TT)
ON ON OFF
LED (LSC26945SW) LCD (LSC26945TT)
DISPENSER
MICOM FUNCTION
- 14 -

2-5. ICE PLUS freezing
1. ICE PLUS freezing is a function to increase the cooling speed of the freezer compartment by running both the
compressor and the fan simultaneously.
2. ICE PLUS is cancelled and the refrigerator returns to its default setting in the event of a power interruption.
3. Selecting ICE PLUS changes only the speed of the cooling without affecting the set temperature.
4. The temperature can be adjusted even when ICE PLUS has been selected and is in progress.
5. The freezer operates at whatever temperature was set at the time ICE PLUS was selected.
6. If you select ICE PLUS, the compressor and fan will run until it is deselected or the cycle time has elapsed.
(3 hours : compressor and fan run / 3 ~ 24 hours : COLDEST operation)
7. If a defrost cycle occurs while an ICE PLUS is already running, ICE PLUS runs for its remaining cycle time after the
defrost cycle is completed. If the defrost cycle takes longer than 30 minutes, ICE PLUS will run for only 2 hours at the end
of the defrost cycle.
8. If you press ICE PLUS during a defrost cycle, the ICE PLUS indicator (LCD or LED, depending upon the model) will
illuminate but the compressor will not operate until the defrost cycle is complete.
9. If you press ICE PLUS within 7 minutes of compressor cut-off, the compressor will not operate until the 7-minute delay
has passed.
10. The freezer fan motor runs at high speed during the ICE PLUS cycle.
2-6. JET FREEZING (LSC26945TT/ LSC26945SW)
1. JET FREEZING is a function to increase the cooling speed of the JET FREEZING compartment within the freezer by
running both the compressor and the JET FREEZING fan simultaneously.
2. JET FREEZING is cancelled and the refrigerator returns to its default setting in the event of a power interruption.
3. The display temperature is not changed by selecting JET FREEZING.
4. If JET FREEZING is selected, the compressor (after the 7-minute compressor delay time passes) and the freezer fan
motor will operate. The temperature in the refrigerator will drop and the fan motor will be off while the JET FREEZING
cycle runs, a maximum of 2 hours. The JET FREEZING indicator will go off at the end of the JET FREEZE cycle.
5. To prevent icing up, the JET FREEZING fan motor will cycle for 10 seconds every hour when JET FREEZING is not
selected.
6. If the JET FREEZING fan motor fails, this failure will not be detected because it is a 12-volt DC operation.
7. To check the JET FREEZING function, press and hold the FREEZER button or ICE PLUS/JET button for more than one
second. The JET FREEZE fan will operate.
MICOM FUNCTION
- 15 -

2-7. OptiChill Function (LSC26945TT/ LSC26945SW Model)
1. The OptiChill is positioned at the bottom of fresh food room separately and allow a user to select and adjust a desired
temperature according to kinds of food such as meat, fish, vegetables and fruits and so on. The selected temperature to
any kinds of food let user to keep their food longer.
2. OptiChill comprises of OptiChill sensor at the rear of OptiChill and a damper between OptiChill and freezer room and a
temperature adjusting display at the top of it.
3. When powered on, the initial NOTCH of OptiChill display will be on “FRUIT VEGE”.
If only R-DOOR is OPENED, OptiChill LED will be ON.
4. Every time pressing the button, the LED shows “FRUIT VEGE”(39°F) →“CHILED ROOM”(30°F) →“PARTIAL FREEZING
(27°F)” →“FRUIT VEGE”(39°F) in orders and also shows a target temperature to be controlled at the same time, then the
NOTCH will be changed relatively.
5. The OptiChill sensor detects a desired temperature at micom, and if the temperature is satisfied, the OptiChill damper will
be closed and if the temperature is unsatisfied, the OptiChill damper will be opened and then the temperature will be
cooled.
6. If the OptiChill damper doesn’t operate for 1 hour, it will be physically operated for seconds to prevent from being frozen.
MICOM FUNCTION
- 16 -
°F / SET TEMP
/ TIME REMAINING
MIN
FRUIT
VEGE
CHILED
ROOM
PARTIAL
FREEZING
SELECT
HR
Display 27°F 30°F 39°F
NOTCH Partial
Freezing
Chilled
Room
Fruit
VEGE

2-8. Control of variable type of freezing fan
1. To increase cooling speed and load response speed, MICOM variably controls freezing room fan motor at the high speed
of RPM and standard RPM.
2. MICOM only operates in the input of initial power or express freezing operation or load response operation for the high
speed of RPM and operates in the standard RPM in other general operation.
3. If opening doors of freezing / cold storage room or home bar while fan motor in the freezing room operates, the freezing
room fan motor normally operates (If being operated in the high speed of RPM, it converts operation to the standard
RPM). However, if opening doors of freezing room or home bar, the freezing room fan motor stops.
4. As for monitoring of BLDC fan motor error in the freezing room, MICOM immediately stops the fan motor by determining
that the BLDC fan motor is locked or poor if there would be position signal for more than 115 seconds at the BLDC motor.
Then it displays failure (refer to failure diagnosis function table) at the display part of refrigerator, the BLDC motor doesn’t
operate more. If you want to operate the BLDC motor, turn off and on power resource.
2-9. Control of cooling fan motor
1. The cooling fan motor performs ON/OFF control by linking with the COMP.
2. It controls at the single RPM without varying RPM.
3. Failure sensing method is same as in fan motor of freezing fan motor (refer to failure diagnosis function table for failure
display).
2-10. Door opening alarm
1. Buzzer generates alarm sound if doors are not closed even when more than a minute consecutively has passed with
doors of freezing / cold storage room or home bar opened.
2. Buzzer rings three times in the interval of 0.5 second after the first one-minute has passed after doors are opened and
then repeats three times of On/Off alarm in the cycle of every 30 seconds.
3. If all the doors of freezing / cold storage room or home bar are closed during door open alarm, alarm is immediately
released.
2-11. Ringing of button selection buzzer
1. If pressing the front display button, “Ding ~ “sound rings.
MICOM FUNCTION
- 17 -
Doors of freezing /
cold storage room
or home bar
BUZZER
Closing
Opening
Within
a minute
A minute
30
seconds
30
seconds
30
seconds
Opening Closing Closing
3 Times 3 Times 3 Times 3 Times

2-12. Ringing of compulsory operation, compulsory frost removal buzzer
1. If pressing the test button in the main PCB, “Phi ~”sound rings.
2. In selecting compulsory operation, alarm sound is repeated and completed in the cycle of On for 0.2 second and Off for
1.8 second three times.
3. In selecting compulsory frost removal, alarm sound is repeated and completed in the cycle of On for 0.2 second , Off for
0.2 second, On for 0.2 second and Off for 1.4 second three times.
2-13. Frost removal function
1. Frost removal is performed whenever total operation time of compressor becomes 7 ~ 7.5 hour.
2. In providing initial power (or returning power failure), frost removal starts whenever total operation time of compressor
becomes 4 ~ 4.5 hour.
3. Frost removal is completed if temperature of a frost removal sensor becomes more than 5°C after starting frost removal.
Poor frost removal is not displaced if it does not arrive at 5°C even if two hours have passed after starting frost removal.
4. No removal is done if frost removal sensor becomes poor (snapping or short-circuit).
2-14. Refrigerator room lamp automatically off
•Refrigerator room lamp turn on and off by refrigerator door switch.
•If refrigerator room lamp continuously turns on more than 7 minutes, the refrigerator room lamp turns off automatically by
compulsion.
MICOM FUNCTION
- 18 -

2-15. Sequential operation of built-in product
Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are
sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of
parts in applying initial power and completing test.
MICOM FUNCTION
- 19 -
Function Load Operation Sequence Remark
In applying Initial power TEST MODE
When temperature
of a frost removal
sensor becomes
more than 45°C
(In purchase,
movement)
If error occurs
during operation,
initial operation is
not done.
■Sequence of
load operation
when closing
F-room and
R-room.
If pressing switch
once more in the
test mode 2 or
temperature of a
frost removal
sensor is more
than 5°C, it
immediately
returns to the test
mode for initial
operation
(COMP operates
after 7 minutes).
When
temperature of a
frost removal
sensor becomes
less than 45°C
(In power failure,
service)
Test mode 1
(Compulsory
function)
Test mode 2
(Compulsory frost
removal)
POWER
ON
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
OPTICHILL
STEP
DAMPER
MOTOR
ON
FROST
REMOVAL
HEATER
OFF
FROST
REMOVAL
HEATER
ON
DAMPER
&
DUCT DOOR
& OPTICHILL
HEATER ON
DAMPER
&
DUCT DOOR
&
OPTICHILL
HEATER OFF
0.3
sec.
6.0
sec.
0.3
sec.
0.3
sec.
0.3
sec.
POWER
ON
0.3
sec.
PIPE
&
DISP'
HEATER
OFF
0.3
sec. COMP
ON
0.3
sec. F-FAN
&
C-FAN
ON
0.3
sec. R-STEP
MOTOR
DAMPER
ON
0.3
sec.
OPTICHILL
STEP
DAMPER
MOTOR
ON
PIPE
&
DISP'
HEATER
ON
TEST
SWITCH
(PRESS
Once)
OTHER
LOAD
OFF
COMP
ON
F-FAN
&
C-FAN
ON
R-STEP
MOTOR
DAMPER
ON
OPTICHILL
STEP
DAMPER
MOTOR
CLOSE
TEST
SWITCH
(PRESS
2 Times)
COMP
OFF
F-FAN
&
C-FAN
OFF
FROST
REMOVAL
HEATER
ON
R-STEP
MOTOR
DAMPER
CLOSE
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.
0.3
sec.

2-16. Failure Diagnosis Function
1. Failure diagnosis function is function to facilitate service when nonconforming matters affecting performance of product
during use of product.
2. In occurrence of failure, pressing the function adjustment button does not perform function.
3. If nonconforming matters occurred are released during display of failure code, MICOM returns to the original state (Reset).
4. Failure code is displayed on the display part of setting temperature for the freezing room and the display part of setting
temperature for the cold storage room of display, which are placed at the display part of a refrigerator. All the display
graphics other than a failure code are turned off.
(1) LSC26945TT/ LSC26945SW Model
MICOM FUNCTION
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