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LG AUUQ18GH1 User Manual

LG AUUQ18GH1
100 pages
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Air Conditioner
SVC MANUAL(General)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

Table of Contents

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LG AUUQ18GH1 Specifications

General IconGeneral
Capacity1.5 Ton
Star Rating3 Star
RefrigerantR32
TypeSplit
Power Supply230 V, 50 Hz

Summary

Part 1 General Information

Safety Precautions and Cautions

Essential safety guidelines, including warnings and cautions for safe operation and repair procedures.

Model Line Up and Specifications

Overview of available air conditioner models and their specifications for selection and reference.

Product Nomenclature Guide

Explanation of product naming conventions for identification of models and components.

Part 2 Functions & Controls

Functions and Accessories List

Comprehensive list of functions and accessories available for the air conditioner units.

Air Flow Features and Modes

Details on various airflow modes, including auto swing, chaos wind, and jet cool operations.

Air Purifying System Operation

Information on the air purification system, including plasma technology for cleaner air.

Installation Functions and Settings

Functions related to unit installation, such as ESP setting and high ceiling operation.

Reliability and Self-Diagnosis

Information on unit reliability, including self-diagnosis and soft dry operation.

Convenience Controls and Features

Features for user convenience, like cooling operations, auto cleaning, and timers.

Special Functions and Kits

Special features and kits, including low ambient control and auto elevation grille.

Part 3 Basic Control Operations

Normal Operation Principles

Basic principle of controlling motor RPM and compressor operation based on working frequency.

Compressor Fuzzy Control

Explanation of fuzzy control for maintaining evaporating temperature and system stability.

EEV Control Mechanism

How the EEV operates with fuzzy rules to maintain superheat or discharge pipe temperature.

Part 4 Troubleshooting Guide

Self-diagnosis and Error Indicators

How the unit self-diagnoses errors and displays indicators for troubleshooting.

Pump Down Procedure

Procedure for pump down operation, including dip switch settings and warnings.

Evacuation Process Steps

Steps for evacuating refrigerant from the system using a vacuum pump.

Gas Charging Procedure

Procedure for charging refrigerant into the system after evacuation, with warnings.

Refrigeration Cycle Analysis

Analysis of refrigeration cycle issues, including temperature differences and pressure checks.

Electronic Parts Troubleshooting

Diagnostics for product operation issues related to electronic components, PCBs, and sensors.

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