LG LRSES2706V /01 User manual

REFRIGERATOR
SERVICE MANUAL
CONFIDENTIAL
CAUTION
PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS MANUAL
BEFORE CHECKING OR OPERATING THE REFRIGERATOR.
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior
written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition
includes, without limitation, any text, graphics or logos in this Service Manual.
Copyright © 2020 LG Electronics Inc. All rights reserved. Only training and service purposes.
MODELS:
LRSES2706V /01

CONTENTSCONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................................................
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8.TROUBLESHOOTING WITHOUT ERROR DISPLAY................................................................................................................
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3
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1. PRODUCT STANDARD...............................................................................................................................................................................
2.CIRCUIT DIAGRAM........................................................................................................................................................................................
3. APPEARANCE SIZE OF REFRIGERATOR AND NAME OF EVERY PART.................................................................
4. MICOM FUNCTION.......................................................................................................................................................................................
5. ICE MAKER DISPENSER..........................................................................................................................................................................
1.WORKING PRINCIPLES........................................................................................................................................................................................
6. COMPRESSOR..............................................................................................................................................................................................
7.TROUBLESHOOTING.................................................................................................................................................................................
1. FREEZER SENSOR ERRROR...............................................................................................................................................................................
2. REFRIGERATOR SENSOR ERROR....................................................................................................................................................................
3.TEMPERATURE SENSOR ERROR......................................................................................................................................................................
4. ICING SENSOR ERROR.......................................................................................................................................................................................
5. DEFROST SENSOR ERROR................................................................................................................................................................................
6. DEFROST HEATER ERROR................................................................................................................................................................................
7. FREEZER FAN ERROR........................................................................................................................................................................................
8. CONDENSER FAN ERROR................................................................................................................................................................................
9. COMMUNICATION ERROR..............................................................................................................................................................................
10. ICEMAKER MOTOR ERROR...........................................................................................................................................................................
9.HOW TO DISASSEMBLE AND ASSEMBLE..................................................................................................................................
1. HANDLE REMOVAL............................................................................................................................................................................................
2. DISPENSER............................................................................................................................................................................................................
3.FAN AND MOTOR DISASSEMBLY METHOD...............................................................................................................................................
4. ICE MAKER............................................................................................................................................................................................................
5. HOW TO ADJUST THE REFRIGERATOR DOOR LEVEL DIFFERENCE...................................................................................................
10. EXPLODED VIEW......................................................................................................................................................................................
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Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

1-1 Safety and precaution instructions before heavy repair
Heavy repair method for refrigerant applied to refrigerator
If you repair the refrigeration cycle, take ventilation into account.
the operation. (Smoking is strictly prohibited).
1-2. Points to check before repair
Open the ASM cover and the rear cover of the refrigerator and check the type of refrigerant indicated on the
compressor before to work Refrigerators that use R600a as a refrigerant have a yellow label on the compressor.
1-3. Characteristics of R600a refrigerant
It is a natural gas refrigerant (CH (CH3) 3), and is not polar. R600a is from the same family as butane gas, so if it is
Explosion concentration: 1.8% ~ 8.4% / vol. Ignition temperature: 494 ° C
1-4. Characteristics of R600a refrigerant
It has about 60% of the amount of refrigerant in refrigerators that use R134a. In the suction pressure
(low compression), it has a high degree of vacuum (1 bar or less). The volume of the refrigerator compressor
using R600a is 1.7 times larger than the compressor volume of the refrigerator that uses R134a. The label as in
1-5 Place of repair and environment
before working (be sure to use the return bag of coolant inside
near the place of work, and eliminate them before starting work.
within the workplace.
During work, be sure to follow the heavy repair procedure.
substances, such as ether, benzene,
alcohol, chemicals, LP gas, etc., in the
fridge.
This can cause an explosion
METHOD OF REPAIR WITH REFRIGERANT R600a
Note: The images are for reference.
3
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

Safety Warning and Cautions
Chapter 1 Safety Warning and Cautions
WARNING indicates the possibility of serious injury or death if the
instructions are not followed.
Caution indicates a hazardous situation with the possibility of product
damage or personal injury if the instructions are not followed
WARNING
CAUTION
WARNING
Be cautious of electric shock.
Control board (PWB Main and Sub)
uses power supply of about 120 VAC.
Do not allow consumers to directly
repair, disassemble, or modify the
refrigerator.
Harm, electric shock,
r.
Be sure the plug and cord are not
pressed by the rear side of the
refrigerator.
Damage to power plugs
electric shock.
Plug the refrigerator into a
dedicated circuit.
Plugging in too many appliances
the operation of your refrigerator.
Note: The images are for reference.
4
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

If grounding is required, be sure to
consult an electrician.
The refrigerator
must be plugged in
to a properly rated
and grounded
outlet. If you are
not sure of your
voltage or ground,
and licensed
electrician.
Do not store poisonous,
in the refrigerator.
There is danger of
Do not store medications or
biohazardous products requiring
precise temperature control.
Do not use the refrigerator to store
papers, electronic storage media,
or similar items.
The refrigerator is
for storing food.
This is a consumer
household
appliance and not a
precision device.
If storing or disposing of the
refrigerator, remove the doors
to eliminate the possibility of
children playing in it.
Children may
become entrapped in
the refrigerator.
Unplug the refrigerator for
cleaning or repair. Be sure your
hands are dry when handling the
power cord or plug.
Electric shock or
harm may occur.
Be sure the plug and socket are
clean and the connection is tight.
Dust or incomplete
connection may
Grounding nut
Grounding wire
More than
75cm
Copper
plate
Firstly take power socket out for
Electric shock may occur.
When dusts etc are stained to the
pin part of the power socket,
cleanly wipe out them.
Fire may occur.
Safety Warning and Cautions
WARNING
Note: The images are for reference.
5
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

Do not alter the power cord.
Replace it only with an exact factory
replacement part.
Electric shock or
e may occur
due to electrical
damage of power
cables.
Do not place heavy objects on the
refrigerator.
Falling objects when
opening or closing doors
may cause injury.
Do not hang or swing from the
refrigerator doors.
Do not allow children to
play with the refrigerator.
The refrigerator may turn
over
may be pinched.
refrigerator.
Do not install the refrigerator next
to a stove or other sources of heat.
When a gas leak occurs, do not
unplug the refrigerator. Open the
doors for ventilation.
There is danger of
burning due to
explosion and
sparking.
Do not clean the refrigerator by
spraying water inside or outside.
It may result in
product damage,
shock.
This refrigerator is designed for
use as a consumer home
appliance only.
It is not a precision
device for storing
medication or valuables.
Do not install the
refrigerator in a vehicle,
aircraft, maritime vessel,
or other than in a home
environment.
If the refrigerator is submerged or otherwise inundated
with water, have it checked by an authorized servicer.
r.
Safety Warning and Cautions
WARNING
Note: The images are for reference.
6
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

Do not put glass bottles or other
sealed containers in the freezer.
They may burst, leaving
glass fragments in the food
and possibly causing injury.
Be sure to use rated parts for
replacement of electric parts.
Use factory replacement parts.
Secure the cord behind the
refrigerator.
Do not allow the cord to
hang where it can be
pinched, damaged, or rolled
over by the refrigerator.
Pull the plug out by the plug body;
do not pull the wire to disconnect
the cord.
Damage to power cords
shock.
Keep electrical parts and
connections free from dust and
contamination.
from shorting or arcing.
Be sure replacement parts are an
Replacement parts should look
parts and have the same electric
rating.
Do not let moisture drop onto
electrical parts.
If there is a problem in this area, replace the
parts or tape the wires to prevent
contamination and degradation.
Note: The images are for reference.
If you unplug the refrigerator or
before plugging it back in
or turning the power on.
Rapid cycling of the compressor
could cause failure.
cup, cosmetics or drugs, etc
are contained on the
refrigerator.
Fire or electric shock may occur, or
injury due to dropping may occur.
Do not accumulate objects on a
refrigerator or do not keep
foods in random method.
Dropping of objects when opening
or closing the door may cause
physical injury.
Safety Warning and Cautions
WARNING
7
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

Unplug the refrigerator if it is
going to be unused for an
extended period.
Remove all food items,
wipe down the inside of
the refrigerator, dry it
thoroughly, and prop the
doors open to allow air
circulation.
weight of the refrigerator.
If the refrigerator is not installed
at a rm, level location, the
doors and icemaker may not
operate properly.
Do not install the refrigerator in a
place where it is subject to
splashing and excess moisture.
Deterioration of insulation
may cause electrical
leakage.
To carry the refrigerator, use the
handles at the top of the back, and
beneath the edge of the front.
Using these handles will
ensure safety and reduce
the possibility of injury.
Do not touch foods, containers, or
the inside of the freezer
compartment with wet hands.
Your hands may stick
to the cold items. It
could cause frost bite.
Be careful to avoid pinching hands
or feet when opening the doors.
under the bottom of the
refrigerator.
Watch out for sharp
edges.
Do not put live animals in the
refrigerator.
power plugs catching with the end
of plugs without catching cords.
Fire may occur due to electric
shock or short-circuit.
Do not use power cords or power
plugs when they are damaged or
holes of power plugs are loose.
Fire may occur due to
electric shock or
short-circuit.
Safety Warning and Cautions
WARNING
8
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.

Product Standards
Heater
Temperature control
Initial defrost
Defrost cycle
Rest time
Defrost sensor
Temp.fuse (rated/ operation
temperature)
Heater Sheath
Dispenser duct door heater
R-Room home bar heater
F-Room home bar heater
Dispenser heater
Comp’ Running
I/maker geared motor Running
Magic room Damper Heater
R-Room Damper Heater
Water Tank Heater
Water supply Heater
-
AC 250V / 14 ㎌
DC 12V / 5W (1EA)
DC 13V
DC 13V
MRA12362
DC 12V / 0.8W
MOLECULAR SIEVE XH-9
DC 12V / 2.5W
-
AC 125 V / 10 A
250 V / 10 A
250 V / 0.5 A
250 V / 0.5 A
DC 12V / 5W (1EA)
-
DC 12V / 1W
120V / 6.5W
-
350W
N/A
250V / 72
Returend to defrost function when reaching to 5
3 Min
9~11 hours (vary depending on condition)
4~5 hours (vary depending on condition)
Auto
Auto
Forced method
Freol Alpha5 oil(175cc)
Forced convection method
Discrete Type
A Logic Inverter operation
2
-
Home bar door switch
Door switch (F-Room/R-Room)
F-Room fan motor
Overload protective device
Evaporator
Conderser
-
4
2
3
Cyclo-Pentane
Forced method
Eective inner
capacity
R-Room
Freezing cycle
Parts related
with dewing
prevention
Type of heat shield
Eva oration
F-Room
Product weight (Kg)
Outer dimension ( W X D X H )
Method
F-Room
F-Room
Cooling method
F-Room
LRSES2706*
MICOM(Outside)
MICOM(Outside)
Indirect cooling(F-Control)
350 ± 10% (W)
105 ± 15%(W)
35.9 (W) x 33.9 (D) x 70.3 (H) inch
129 kg
For
preventing
ice making
End
Start
R-Room
Fixed Shelf
Drawer
Shelf(Movable, Folding)
Rated consumption power of motor
Capacitor
Dryer (drying tube)
Electrical parts
s andard
Power cord
Main Fuse
Egg container
Vegetable room
Compressor driving method
Inside lamp at R-Room
Inside lamp at F-Room
Fan motor for cooling condenser
Defrost
F-Room
R600a (80g)
Ø 0.70
Model
Fixed Shelf
Oil Charge
Type of refrigerant
Capillary tube
Total inner capacity(cu.ft) 26.8 (759.0 L)
16.9 (478.6 L)
9.9 (280.4 L)
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reserved. Only training and service purposes.

Circuit Diagram
10
Copyright © 2020 LG Electronics Inc. All rights
reserved. Only training and service purposes.