LG LMX30665 Series User manual

CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MODEL : LMX30665** COLOR : STAINLESS(ST)
REFRIGERATOR
SERVICE MANUAL

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CONTENTS
SAFETY PRECAUTIONS .................................................................................................................................... 2
1. SPECIFICATIONS .......................................................................................................................................... 3
2. PARTS IDENTIFICATION .............................................................................................................................. 4
3. DISASSEMBLY ......................................................................................................................................... 5-24
REMOVING AND REPLACING REFRIGERATOR DOORS .......................................................................... 5
DOOR.............................................................................................................................................................. 6
DOOR ALIGNMENT ....................................................................................................................................... 7
FAN AND FAN MOTOR................................................................................................................................... 7
DEFROST CONTROL ASSEMBLY ................................................................................................................ 8
REFRIGERATOR LIGHT (TOP) ................................................................................................................ 9-10
MULTI DUCT ................................................................................................................................................ 10
DISPENSER ................................................................................................................................................. 11
DISPLAY PCB .............................................................................................................................................. 11
ICE BUTTON ASSEMBLY ............................................................................................................................ 11
WATER BUTTON ASSMEBLY ..................................................................................................................... 11
ICE CORNER DOOR REPLACEMENT ........................................................................................................ 11
ICEMAKER REPLACEMENT ....................................................................................................................... 12
SUB PCB FOR WORKING DISPENSER ..................................................................................................... 12
CAP DUCT MOTOR REPLACEMENT ......................................................................................................... 13
HOW TO REMOVE A ICE BIN ..................................................................................................................... 14
HOW TO INSERT A ICE BIN ........................................................................................................................ 14
PULL OUT DRAWER ................................................................................................................................... 15
HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER ......................................................... 16-17
WATER VALVE DISASSEMBLY METHOD ................................................................................................. 18
FAN AND FAN MOTOR DISASSEMBLY METHOD.......................................................................................18
CAUTION : SEALED SYSTEM REPAIR ........................................................................................................19
4. ADJUSTMENT ............................................................................................................................................. 25
COMPRESSOR............................................................................................................................................. 25
5. CIRCUIT DIAGRAM ..................................................................................................................................... 26
6. TROUBLESHOOTING ............................................................................................................................ 27-28
7. PCB PICTURE ........................................................................................................................................ 29-30
8. Troubleshooting With Error Display .................................................................................................... 31-42
9. Troubleshooting Without Error Display ............................................................................................. 43-51
10. Reference .............................................................................................................................................. 52-55
11. COMPONENT TESTING INFORMATION ............................................................................................. 56-65
12. COMPRESSOR TROUBLESHOOTING ............................................................................................... 66-78
13. ICEMAKER OPEARTING METHOD AND TROUBLE SHOOTING ...................................................... 79-82
14. DESCRIPTION OF FUNCTION & CIRCUIT OF MICOM ....................................................................... 83-86
SAFETY PRECAUTIONS
Please read the following instructions before servicing your refrigerator.
1. Unplug the power before handling any elctrical componets.
2. Check the rated current, voltage, and capacity.
3. Take caution not to get water near any electrical components.
4. Use exact replacement parts.
5. Remove any objects from the top prior to tilting the product.

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1. SPECIFICATIONS
1-1 LMX30665**
DOOR DESIGN
DIMENSIONS (inches)
NET WEIGHT (pounds)
COOLING SYSTEM
TEMPERATURE CONTROL
DEFROSTING SYSTEM
DOOR FINISH
HANDLE TYPE
INNER CASE
INSULATION
ITEMS
Side Rounded
35 3/4 X 36 1/4 X 70 1/4 (WXDXH) 30cu.ft.
158kg (348lb)
Fan Cooling
Micom Control
Full Automatic
Heater Defrost
PCM, VCM, Stainless
Bar
ABS Resin
Polyurethane Foam
SPECIFICATIONS
●31 cu.ft.
VEGETABLE TRAY
COMPRESSOR
EVAPORATOR
CONDENSER
REFRIGERANT
LUBRICATING OIL
DEFROSTING DEVICE
ITEMS
Clear Drawer Type
Linear
Fin Tube Type
Spiral Condenser (AI)
R-134a (140 g)
ISO10 (280 ml)
SHEATH HEATER
LED Module
LED Module
SPECIFICATIONS
LAMP REFRIGERATOR
FREEZER
●DIMENSIONS
Depth w/ Handles
Depth w/o Handles
Depth w/o Door
Depth (Total with Door Open)
Height to Top of Case
Height to Top of Door Hinge
Width
Width (door open 90 deg. w/o handle)
Width (door open 90 deg. w/ handle)
A
B
C
D
E
F
G
H
I
36 1/4 in
33 3/4 in
29 1/2 in
48 1/8 in
68 3/4 in
70 1/4 in
35 3/4 in
40 in
45 in
Description LMX30665**

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2. PARTS IDENTIFICATION
Door-In-Door Case
The convenience of a “soft cool”
storage area and easy access to
items stored in this area.
Adjustable Refrigerator Shelf
The shelves in your refrigerator are
adjustable to meet your individual
storage needs.
Cheese & Butter Bin
Cheese & Butter and
Condiment bins are
specially designed
for food that can be
stored at a warmer
temperature. This makes
spreading butter and
slicing cheese easier.
Condiment Bin
Glide‘N’Serve
Allows you to store food
items at a different
temperature than the
regular refrigerator area.
Water filter
Purifies water.
NOTE
The filter should be replaced every
6 months. Please refer to the “Replacing
the filter” section in this
manual for details.
* This function may
not beavailable,
depending onthe
model.
Indoor Ice Bin
Icecubes are
automaticallyproduced.
Crisper
Controls humidity and
helpsvegetablesand
fruitto stay crisp.
Ice Storage Bin
For additional ice storage.
Fixed Door Bin
Used to preserve
chilled food or drinks.
Durabase® and Durabase® Divider
The Durabase is a storage space
recommended for the preservation of large
food items. The Durabase Divider is used
to organize the Durabase area into sections.
It can be adjusted from side to side to
accommodate items of different sizes.
LED interior lamps
The interior lamps light up the
inside of the refrigerator.

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3. DISASSEMBLY
3-1 REMOVING AND REPLACING REFRIGERATOR DOORS
Removing Refrigerator Door
CAUTION: Before you begin, unplug the refrigerator. Remove food and bins from doors.
Left Door -FIG. 2
1. Disconnect water supply tube by pushing back on the disconnect ring (3).-FIG. 1
2. Open door. Loosen top hinge cover screw (1).
Use flat tip screwdriver to pry back hooks on front underside of cover (2). Lift up cover.
3. Disconnect door switch wire harness and remove the cover.
4. Pull out the tube.
5. Disconnect all 3 wiring harnesses (4). Remove the grounding screw (5).
6. Rotate hinge lever (6) counterclockwise. Lift top hinge (7) free of hinge lever latch (8).
7. Lift door from middle hinge pin and remove door.
8. Place the door with the insides facing up, on a not scratch surface.
CAUTION: When lifting hinge free from the latch, be careful that door does not fall forward.
Right Door -FIG. 3
1. Open the door, remove 1 screw on the top of the hinge cover. Loosen top hinge cover screw (1). Lift up cover (2).
2. Disconnect door switch wire harness and remove the cover.
3. Rotate hinge lever (3) clockwise. Lift top hinge (4) free of hinge lever latch (5).
4. Lift door from middle hinge pin and remove door.
5. Place the door with the insides facing up, on a not scratch surface.
CAUTION: When lifting hinge free from the latch, be careful that the door does not fall forward.
Figure 2 Figure 3
Figure 1
1) Insert the tube until you can see only one of
the lines printed on the tube.
2) After inserting, pull the tube to ascertain that
it is secure.
3) Assemble clip.

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1. Remove gasket
Remove the gasket from gasket channel at doorliner as
shown in the illustration below.
3-2 DOOR
Mullion Removal
1. Remove 2 screws.
Door Gasket Removal
2. Lift mullion up carefully.
3. Disconnect wire harness.
Door Gasket Replacement
1. Insert gasket into channel
Insert and press gasket into channels at doorliner.
2. Insert mullion into channel.
Insert the mullion into channel at door as shown below.
Mullion Replacement
1. Connect wire harness.
3. Assemble 2 screws.
Gasket
Gasket
Channel

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3-4 FAN AND FAN MOTOR
1. Remove the freezer drawer.
2. Remove the plastic guide for slides on left side by
unscrewing phillips head screws.
3. Remove the grille assembly by removing four screws
and pulling the grille assembly forward.
4. Remove the Fan Motor assembly by loosening 3 screws
and disassembling the shroud.
5. Pull out the fan and separate the Fan Motor and Bracket
Motor.
FAN MOTOR
BRACKET
MOTOR
Shroud
Ice Fan Assembly
3-3 Door Alignment
If the level of refrigerator doors is uneven, follow the
instructions below to align the doors:
Turn the leveling legs (CCW) to raise or (CW) to lower the
height of the front of the refrigerator by using flat blade
screw driver or 11/32" wrench. Use the wrench (Included
with the User Manual) to adjust the bolt in the door hinge to
adjust the height. (CW to raise or CCW to lower the height.)
The Left refrigerator door has an adjustable nut, located on
the bottom hinge, to raise and lower them to align properly.
If the space between your doors is uneven, follow the
instructions below to align the Left door evenly: Use the
wrench (included with the Use & Care Guide) to turn the nut
in the door hinge to adjust the height To the right to raise or
to the left to lower the height.
On the other hand, The Right refrigerator door does not
have an adjustable nut. If the space between your doors is
uneven, follow the instructions below to align the Right
door:
1. With one hand, lift up the Right door you want to raise at
middle hinge.
2. With other hand, use pliers to insert snap ring as shown.
3. Insert additional snap rings until the Right door is aligned.
(Three snap rings are provided with unit.)
Up
Down

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*Ice Fan Assembly Replacement
1) Remove the plastic guide for slides on left side by
unscrewing phillips head screws.
2) Pull out the cover sensor to disassemble by using tools
shown in the figure.
3) Pull out the cover grille to disassemble by using tools
shown in the figure.
4) Put your hand into the inside of grille to disassemble
shown in the figure.
5) Disconnect wire harness of the grille assembly.
6) Remove the Ice fan assembly by loosening all screws.
(1) (2)
(3) (4)
(5) (6)
3-5 DEFROST CONTROL ASSEMBLY
Defrost Control assembly consists of Defrost Sensor and
FUSE-M.
The Defrost Sensor works to defrost automatically. It is
attached to the metal side of the Evaporator and senses its
temperature. At 46F(8°C), it turns the Defrost Heater off.
Fuse-M is a safety device for preventing over-heating of
the Heater when defrosting.
1. Pull out the grille assembly. (Figure 1)
2. Separate the connector with the Defrost Control
assembly and replace the Defrost Control assembly after
cutting the Tie Wrap. (Figure 2)
GRILLE ASSEMBLY DEFROST-CONTROL
ASSEMBLY

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3-6 Refrigerator Light (Top)
Unplug Refrigerator, or disconnect power at the circuit
breaker.
If necessary, remove top shelf or shelves.
1) Unplug refrigerator power cord from electric outlet.
2) Put flat screwdriver into service hole and remove cover
of refrigerator light.
3-6-1 Refrigerator Compartment Lamp
4) Replace the LED assembly.
3) Remove the LED assembly from connector.
3-6-2 Refrigerator Light (Side)
1. Unplug refrigerator power cord from electric outlet.
2. Put flat screwdriver into sevice hole and remove cover of
refrigerator light.
3. Remove the LED assembly from connector.
4. Replace LED assembly.
5. Assemble the cover in reverse order.

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3-7 MULTI DUCT
3-6-3 Cap Duct LED LAMP(Bottom)
1. Unplug refrigerator power cord from electric outlet.
2. Open the refrigerator door to need diassembly.
3. Put flat screwdriver into service hole, remove the cover
of cap duct LED LAMP.
5. Replace LED assembly.
6. Assembly the cover in reverse order.
4. Remove the LED assembly from connector.
1. Remove 2 screws and guide rail.
2. Remove the upper and lower Caps by using a flat
screwdriver and remove 2 screws as shown figure.
3. Disconnect the lead wire on the bottom position
4. Grip both side of multi duct, pull it out.

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3-12 ICE CORNER DOOR REPLACEMENT
1) Loosen the front screw as shown in the picture.
2) Lift up the hinge with one hand.
3) Pull out the Ice Corner Door with the other hand.
3-11 WATER BUTTON ASSMEBLY
1) Remove screws.
2) Grasp the Button assembly and lift.
Button Lever
hinge
3-8 DISPENSER
1) Pull out the drain 2) Holding the inner side of
the dispenser pull
forward to remove.
3-9 DISPLAY PCB
As shown below, remove 1 screw on the PCB fixing screw.
Remove the display PCB fixing screw.
3-10 ICE BUTTON ASSEMBLY
1) Remove the 1 screw holding the lever.
2) Remove the spring from the hook.
3) Push and pull on the tab to remove.
CAUTION: When replacing the dispenser cover make
sure the lead wire does NOT come off and the water line
is not pinched by the dispenser.
Button Lever
Case, PCB Display PCB
3) If nozzle is interfered with button,
push and pull out the bottom of
button.
4) Remove the
lead wire.

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3-13 ICEMAKER REPLACEMENT
1) Remove 4 screws as shown.
2) Grasp the bottom of motor cover assembly and pull
slowly.
3) Disconnect wire harness from wall of compartment.
In-door
motor
3-14 SUB PCB FOR WORKING DISPENSER
1) Disconnect the wire harness.
2) Remove 1 screw from PCB and replace with new PCB.
CAUTION: Make sure that the motor housing is taped to
the mold, if not positioned correctly the cover will not fit
properly.

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3-15 CAP DUCT MOTOR REPLACEMENT
1) Separate the Housing of the Cap Duct Motor.
3) When replacing the motor, check the position of the door
duct and the link for proper fit.
Link
Duct Door
Cap Duct Motor NG Position
2) Unscrew 3 screws to disassemble the motor.
4) Insert 2 screws.
5) Push housing aside.

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3-16 HOW TO REMOVE A ICE BIN
1) Grip the handles, as shown.
2) Tilt and lift slightly as shown.
3-17 HOW TO INSERT A ICE BIN
1) Insert the Ice Bin, slightly tilting to avoid touching the
Icemaker. (Especially, Ice-Detecting Sensor)
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3) Remove ice bin slowly.

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3-18 PULL OUT DRAWER
Top Drawer
Pull the drawer open to full extension. Remove the basket and extra ice bin by lifting the basket from the rail system.
Bottom Drawer
Pull the drawer open to full extension. Remove the Durabase by lifting the basket rom the rail system.

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3-19 HOW TO REMOVE AND REINSTALL THE PULLOUT DRAWER
3-19-1 Follow Steps to Remove
Step 1) Open the freezer door. Step 2) Remove the lower basket.
Step 4) Removal of the freezer door is done by l ifting
clear of the rail support.
Fully extend both rails.
Step 5) Remove only 1 screw of gearice, and
disassemble the bar and gearice
Step 6) Remove 2 screws of both side of supporter covers
tv and disassemble the supporter cover tv.
Step 3) Remove the four screws from each side

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3-19-2 Follow Steps to Reinstall
Step 3) Put gear ice assembled with the bar by screw into
connector rail’s hole. Step 4) Insert opposite gear ice into connector rail and screw them
Step 1) Insert both side of supporter cover tv into
connector rails, and then screw them. Step 2) ①Assemble a bar and gear ice with screw.
②Push the otherside of the gear to inside of the
bar.
Step 5) The rail system will align itself by pushing the rails
all the way into the freezer section.
Pull the rails back out to full extension.
Step 6) Reinstall the freezer door by inserting the rail tabs
into the guide rail.
* Assemble them like as pictures
Step 7) Reinstall the four screws into the guide rails Step 8) Reinstall the lower basket, and close the freezer
door.

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3-20 WATER VALVE DISASSEMBLY METHOD
1) Turn off the water to unit. Remove the waterline from the
valve.
3-21 FAN AND FAN MOTOR DISASSEMBLY
METHOD
1) Remove screws for the Drain Pipe Assembly and the 1
connected to the Motor Cover.
2) Remove cover and 1 screw from the valve.
3) Separate the housing and remove the valve.
4) Remove the clip, and press the collet to separate the
tube from the connector. Note: there maybe some water
in the line.
Mechanical Cover
Housing
MOTOR COVER
2) Separate the Fan Assembly and Motor, turn counter
clockwise to remove from the motor shaft.
FAN ASSEMBLY MOTOR
Assemble in reverse order. Taking care to avoid.
1. Do not to bend the tube during assembly.
2. Press the Water Dispenser button letting water pour out,
this checks for any leaks in the tube connection, this may
vary depending on the water pressure
( about 2 minutes.).

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3-22 CAUTION : Sealed System Repair
Before making a sealed system repair : Start with the power cord unplugged from the outlet. Plug in the power cord and
between 6 and 12 seconds after it has been pugged in, unplug it from the power source. this will allow both sides of the 3
way valve to be opened to allow for proper evacuation.
3-23 Way Valve Service Whole picture of refrigerator
R-Evaporator
F-Evaporator
The 3 way valve has plastic parts inside, so always wrap
it with a wet cloth before servicing when using a torch.
1) Always replace the 3 way valve if there is a leak at any
one of the 3 tubes coming from it.
2) Service in replacement of valve (valve failure) Perform
service in the same method as above.
Note : To service sealed system, follow the directions in 3-22 and 3-23 above.Then service is the same as a single
evaporator system.
3 way valve
To Freezer(Refrigerant outlet)
Dryer Side(Refrigerant Inlet)
To Fresh Food
(Refrigerant outlet)
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 
  
 

 
 
 
F-Evaporator
3 Way Valve
R-Evaporator
F-Evaporator

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3-24 HOW TO REMOVE AND REINSTALL THE HOMEBAR
3-24-1 CASE ASSEMBLY, HOME BAR
The Home Bar is removable for easy cleaning and
adjustment.
1. To remove the Home Bar, Slopingly lifts the Home Bar
up and pulls straight out.
2. To replace the Home Bar, Slopingly slides it in above
the desired support and push down until it snaps into
place.
NOTE : Some Home Bar may vary in appearance and
will only fit in one location.
3-24-2 DOOR BASKET OF HOME BAR DOOR
The Door Baskets are removable for easy cleaning and
adjustment.
1. To remove the Door Baskets, simply lifts the Door
Baskets up and pulls straight out.
2. To replace the Door Baskets, slides it in above the
desired support and push down until it snaps into place.
NOTE : Some Door Baskets may vary in appearance
and will only fit in one location.
3-24-3 DOOR BASKET OF HOME BAR
The Door Baskets of Homebar are removable for easy cleaning and adjustment.
1. To remove the Door Baskets of Homebar, simply lifts the Door Baskets of Homebar up and pulls straight out.
2. To replace the Door Baskets of Homebar, slides it in above the desired support and push down until it snaps into
place.
NOTE : Some Door Baskets of Homebar may vary in appearance and will only fit in one location.

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