- 2 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. PREFACE
1.1 SAFETY PRECAUTIONS................................2
1.2 INSULATION RESISTANCE TEST .................2
1.3 SPECIFICATIONS...........................................3
1.4 FEATURES......................................................4
1.5 CONTROL LOCATIONS .................................4
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS ....................................5
2.1.1 FRONT GRILLE .....................................5
2.1.2 CABINET ................................................5
2.1.3 CONTROL BOX .....................................5
2.2 AIR HANDLING PARTS ..................................6
2.2.1 AIR GUIDE AND BLOWER ....................6
2.2.2 FAN AND SHROUD ...............................6
2.3 ELECTRICAL PARTS......................................7
2.3.1 OVERLOAD PROTECTOR ....................7
2.3.2 COMPRESSOR......................................7
2.3.3 CAPACITOR...........................................7
2.3.4 POWER CORD ......................................8
2.3.5 THERMOSTAT .......................................8
2.3.6 ROTARY SWITCH .................................8
2.3.7 MOTOR ..................................................8
2.4 REFRIGERATION CYCLE ..............................9
2.4.1 CONDENSER.........................................9
2.4.2 EVAPORATOR.......................................9
2.4.3 CAPILLARY TUBE .................................9
3. INSTALLATION
3.1 SELECT THE BEST LOCATION...................12
3.2 CHECK OF INSTALLATION..........................12
3.3 HOW TO DRAIN............................................12
3.4 HOW TO INSTALL ........................................13
3.5 HOW TO USE THE REVERSIBLE INLET GRILLE...17
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS ...............................18
4.2 PIPING SYSTEM...........................................18
4.3 TROUBLESHOOTING GUIDE ......................19
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................24
5.2 ELECTRONIC CONTROL DEVICE...............25
5.3 COMPONENTS LOCATION
(OF MAIN P.C.B ASM) ..................................26
5.4 COMPONENTS LOCATION
(OF DISPLAY P.C.B ASM) ............................26
6. EXPLODED VIEW
..................................27
1. PREFACE
This
SERVICE MANUAL
provides various service information, including the mechanical and electrical
parts etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.
1.1 SAFETY PRECAUTIONS
1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF and unplug the power
cord.
2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.
3. After servicing the unit, make an insulation resis-
tance test to protect the customer from being
exposed to shock hazards.
1.2 INSULATION RESISTANCE TEST
1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green) is to be open.
3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF) of the ROTARY SWITCH.
4. The value should be over 1M
Ω
.
CONTENTS
Summary of Contents for WR-8020
Page 29: ...P NO 3828A20247A March 2008 ...
