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LG ATNH246FLFC User Manual

LG ATNH246FLFC
174 pages
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LG
Synchro
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.
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LG ATNH246FLFC Specifications

General IconGeneral
BrandLG
ModelATNH246FLFC
CategoryAir Conditioner
LanguageEnglish

Summary

Model Number Nomenclature

Indoor Unit Model Number Description

Explains the coding system for indoor unit model numbers, detailing features, capacity, and type.

Outdoor Unit Model Number Description

Details the nomenclature for outdoor unit models, covering discharge type, electrical ratings, and capacity.

Safety Precautions

General Safety Warnings and Symbols

Defines WARNING and CAUTION symbols and general safety instructions for users.

Installation Safety Guidelines

Covers electrical safety, grounding, dedicated circuits, and proper installation practices.

Model Names and Specifications

Indoor Unit Model Identification

Lists available indoor unit models, chassis types, and their nominal cooling capacities.

Outdoor Unit Model Identification

Details outdoor unit models, types, and nominal cooling capacities.

External Appearance and Dimensions

Indoor Unit External Appearance

Visual representation of different indoor unit types: Cassette-4Way, Ceiling & Floor, Concealed Duct.

Outdoor Unit External Appearance

Visual representation of outdoor unit models: AUUH488C, AUUH728C, AUUH1008C.

Product Specifications

Indoor Unit Product Specifications

Detailed technical specifications for various indoor unit types.

Outdoor Unit Product Specifications

Detailed technical specifications for outdoor units, including capacity and dimensions.

Combination Table

MPS Variable Unit Combination Options

Lists valid combinations of indoor and outdoor units with branch kit requirements.

Installation Procedures

Indoor Unit Cassette Type Installation

Step-by-step guide for installing indoor cassette type units.

Wiring and Piping Connection

Instructions for connecting indoor unit wiring and pipes.

Refrigerant Charging Methods

Procedures for additional refrigerant charging for different outdoor units.

Operation Modes and Controls

Cooling and Heating Mode Operations

Describes operation logic for Cooling, Soft Dry, and Heating modes.

Fuzzy and Special Operation Modes

Explains Fuzzy operation, Defrost Control, and Jet Cool modes.

Remote Control Operation

Convertible Type Remote Controller Functions

Details buttons and functions for the convertible type remote controller.

CST Type Remote Controller Functions

Explains the buttons and display features of the CST type remote controller.

Control Devices and Function

Simple Central Control System

Features and parts of the simple central control system.

Deluxe Central Control System Overview

Introduces the Deluxe Central Control, its advantages, and capabilities.

Schematic Diagrams

Indoor Unit Electronic Schematics

Detailed circuit diagrams for various indoor unit types.

Outdoor Unit Electronic Schematics

Circuit diagrams for outdoor units AUUH488C, AUUH728C, AUUH1008C.

Piping Diagrams

AUUH488C Piping Configurations

Refrigerant piping diagrams for AUUH488C 'Synchro' Duo and Trio models.

AUUH728C Piping Configurations

Refrigerant piping diagrams for AUUH728C 'Synchro' Duo and Trio models.

Troubleshooting Guide

Cycle Troubleshooting Analysis

Analysis of temperature differences and operating current for cycle issues.

Common Product Operation Errors

Troubleshooting steps for product not operating or not responding to remote control.

Temperature Sensor Troubleshooting

Troubleshooting guide for indoor and outdoor temperature sensor errors.

(3-way) Valve Operations

3-Way Valve (Liquid/Gas Side) Procedures

Details the shaft position and service port for liquid and gas side 3-way valves.

Pumping Down, Evacuation, Gas Charging

Step-by-step procedures for pumping down, evacuation, and gas charging.

Outdoor Unit Functions

Compressor and Fan Control Logic

Explains compressor step control and fan control based on temperature.

Reversing Valve and Defrost Control

Details the operation of the reversing valve and the defrost control process.

Exploded View & Replacement Parts List

Indoor Unit Parts Lists

Exploded views and part numbers for various indoor unit chassis.

Outdoor Unit Parts Lists

Exploded views and part numbers for outdoor units AUUH488C, AUUH728C, AUUH1008C.

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