LG Universal System Air Conditioner User Manual

LG
Universal System
Air Conditioner
SERVICE MANUAL
LG
CAUTION
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

LG Universal System Air Conditioner Specifications

General

Brand	LG
Model	Universal System Air Conditioner
Category	Air Conditioner
Language	English

Summary

Safety Precautions

Installation Safety

Critical instructions and warnings for safe unit installation, covering circuit breakers, grounding, and wiring.

Operational Safety

Essential guidelines for safe and proper unit operation, including handling, placement, and electrical safety.

I. Indoor Units

Introduction to Indoor Units

Overview of indoor units, including model listing, nomenclature, and matching information.

Ceiling Cassette 4-way Units

Detailed information and specifications for the Ceiling Cassette 4-way indoor unit.

Ceiling & Floor Units

Details and specifications for the Ceiling & Floor indoor unit.

Ceiling Concealed Duct Units

Information and specifications for the Ceiling Concealed Duct indoor unit.

II. Outdoor Units

Outdoor Unit Introduction

Overview of outdoor units, including model listing, matching, and nomenclature.

MPS Inverter SINGLE A Outdoor Units

Details on the MPS Inverter SINGLE A outdoor units, covering features, specs, and installation.

III. Troubleshooting Guide

Self-diagnosis Function

Information on the unit's self-diagnosis system, error codes, and indicators.

Cycle Troubleshooting Guide

Guide for troubleshooting issues related to the refrigeration cycle and performance.

Electronic Parts Troubleshooting

Troubleshooting steps for electronic components and PCB issues.

General Troubleshooting Information

General troubleshooting information and common error indicators.

IV. Electronic Control Device

Ceiling Cassette Type Control Device

Details of the electronic control device for Ceiling Cassette type units.

Ceiling Duct Type Control Device

Details of the electronic control device for Ceiling Duct type units.

Ceiling & Floor Control Device

Details of the electronic control device for Ceiling & Floor type units.

V. Schematic Diagram

Ceiling Cassette Type Schematic

Electrical schematic for Ceiling Cassette type units.

Ceiling Duct Type Schematic

Electrical schematic for Ceiling Duct type units.

Ceiling & Floor Schematic

Electrical schematic for Ceiling & Floor type units.

VI. Functional Description

Ceiling Cassette Type Functions

Description of the main control functions for Ceiling Cassette units.

Ceiling Duct Type Functions

Description of the main control functions for Ceiling Duct units.

Ceiling & Floor Functions

Description of the main control functions for Ceiling & Floor units.

Outdoor Unit Functions

Functional descriptions of outdoor unit operations and controls.

VII. Exploded View & Replacement Parts List

Indoor Unit Parts List

Exploded views and part lists for indoor units.

Outdoor Unit Parts List

Exploded views and part lists for outdoor units.

Front Panel Assembly Parts

Exploded views and part lists for front panel assemblies.