Table Of Contents; Safety Precautions - LG GB7143**AV Series Service Manual

CONTENTS
SAFETY PRECAUTIONS ....................................................................................................................................................... 2
SERVICING PRECAUTIONS
SPECIFICATIONS ................................................................................................................ ................................................4-5
PARTS IDENTIFICATION .....................................................................................................................................................6-9
INSTRUCTIONS FOR REVERSING DOOR SWING ........................................................................................................10-12
DISASSEMBLY .................................................................................................................................................................13-15
DOOR ................................................................................................................................................................................13
DOOR SWITCH .................................................................................................................................................................13
REFRIGERATOR ROOM LAMP ........................................................................................................................................13
FAN AND FAN MOTOR .....................................................................................................................................................14
DEFROST CONTROL ASSEMBLY ...................................................................................................................................14
FRIDGE HEATER, SHEATH .............................................................................................................................................15
FREEZER HEATER, SHEATH ..........................................................................................................................................15
CASE ASSEMBLY, PUMP DISASSEMBLY ......................................................................................................................16
COMPRESSOR .................................................................................................................................................................17-22
INVERTER LINEAR COMPRESSOR ...........................................................................................................................17-22
HEAVY REPAIR METHOD OF REFRIGERATOR BY APPLICATION OF REFRIGERANT ................................................23
OUTLINE ............................................................................................................................................................................23
HEAVY REPAIR SVC METHOD ..................................................................................................................................24-29
CIRCUIT DIAGRAM ...............................................................................................................................................................30
TROUBLESHOOTING (MECHANICAl PART) .................................................................................................................31-35
ANOTHER ELECTRIC COMPONENTS ............................................................................................................................31
SERVICE DIAGNOSIS CHART .........................................................................................................................................32
REFRIGERATING CYCLE ...........................................................................................................................................33-35
MICOM FUNCTION & PCB CIRCUIT EXPLANATION ....................................................................................................36-43
MICOM ERROR CODE ..........................................................................................................................................................43
PCB PICTURE ..................................................................................................................................................................44-45
TROUBLESHOOTING WITH ERROR DISPLAY .............................................................................................................46-56
TROUBLESHOOTING WITHOUT ERROR DISPLAY ......................................................................................................57-65
REFERENCE ..................................................................................................................... ...............................................66-70
EXPLODED VIEW &REPLACEMENT PARTS LIST ........................................................................................................71-83

SAFETY PRECAUTIONS

Please read the following instructions before servicing your
refrigerator.
1. Check the set for electric losses.
2. Unplug prior to servcing to prevent electric shock.
3. Whenever testing with power on, wear rubber gloves to
prevent electric shock.
4. If you use any kind of appliance, check regular current,
voltage and capacity.
5. Don't touch metal products in the freezer with wet
hands. This may cause frostbite.
6. Prevent water from following onto electric elements in
the mechanical parts.
7. When standing up after having checked the lower
section of the refrigerator with the upper door open,
move with care to avoid hitting the upper door.
...................................................................................................................................................3
8. When tilting the set, remove any materials on the set,
especially the thin plates(ex. Glass shelf or books.)
9. When servicing the evaporator, wear cotton gloves.
This is to prevent injuries from the sharp evaporator fins.
10. Leave the disassembly of the refrigerating cycle to a
specialized service center. The gas inside the circuit
may pollute the environment.
11. When you discharge the refrigerant, wear the protective
safety glasses or goggle for eye safety.
12. When you repair the cycle system in refrigerator, the
work area is well ventilated.
Especially if the refrigerant is R600a, there are no fire or
heat sources. (No smoking)
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