Table Of Contents; Preface; Safety Precautions; Insulation Resistance Test - LG R1402 Service Manual

1. PREFACE
1.1 SAFETY PRECAUTIONS ...............................2
1.2 INSULATION RESISTANCE TEST.................2
1.3 SPECIFICATIONS ..........................................3
1.4 FEATURES .....................................................5
1.5 CONTROL LOCATIONS .................................5
2. DISASSEMBLY INSTRUCTIONS
2.1 MECHANICAL PARTS....................................7
2.1.1 FRONT GRILLE .....................................7
2.1.2 CABINET................................................7
2.1.3 CONTROL BOX .....................................7
2.2 AIR HANDLING PARTS..................................8
2.2.1 COVER (AT THE TOP)..........................8
2.2.2 BLOWER................................................8
2.2.3 FAN ........................................................9
2.2.4 SHROUD................................................9
2.3 ELECTRICAL PARTS .....................................9
2.3.1 MOTOR..................................................9
2.3.2 COMPRESSOR .....................................9
2.3.3 CAPACITOR ........................................10
2.3.4 POWER CORD ....................................10
2.3.5 THERMOSTAT ....................................10
2.3.6 ROTARY SWITCH ...............................11
2.3.7 SYNCHRONOUS MOTOR ..................11

1. PREFACE

SERVICE MANUAL
This
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
resistance test to protect the customer from being
exposed to shock hazards.
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CONTENTS
provides various service information, including the mechanical and electrical

1.2 INSULATION RESISTANCE TEST

- 2 -
2.4 REFRIGERATION CYCLE............................12
2.4.1 CONDENSER ......................................12
2.4.2 EVAPORATOR ....................................12
2.4.3 CAPILLARY TUBE...............................12
3. INSTALLATION
3.1 HOW TO INSTALL THE UNIT ......................15
3.2 HOW TO USE THE REVERSIBLE INLET GRILLE .......15
3.3 WINDOW REQUIREMENTS.........................16
3.4 INSTALLATION KITS CONTENTS ...............16
3.5 SUGGESTED TOOL REQUIREMENTS .......17
3.5.1 PREPARATION OF CHASSIS.............17
3.6 CABINET INSTALLATION ............................18
4. TROUBLESHOOTING GUIDE
4.1 OUTSIDE DIMENSIONS...............................20
4.2 PIPING SYSTEM ..........................................20
4.3 TROUBLESHOOTING GUIDE......................21
5. SCHEMATIC DIAGRAM
5.1 CIRCUIT DIAGRAM ......................................26
6. EXPLODED VIEW
1. Unplug the power cord and connect a jumper
between 2 pins (black and white).
2. The grounding conductor (green or green & yellow)
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 or O) of the ROTARY SWITCH.
4. The value should be over 1MΩ.
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