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LG AUUH728C User Manual

LG AUUH728C
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 AUUH728C Specifications

General IconGeneral
Power Supply220-240V, 50Hz
TypeSplit System
Compressor TypeRotary
Operating ModesCooling, Heating, Fan, Dehumidification, Auto
FeaturesWi-Fi Control, Smart Diagnosis, Auto Cleaning

Summary

Model Number Nomenclature

Model Number Breakdown

Explains the meaning of each character in the model number for indoor and outdoor units.

Safety Precautions

General Safety Warnings

Provides essential safety instructions and warnings to prevent injury or damage.

Model Names

Unit Model Listings

Lists indoor and outdoor unit models with their capacities and chassis types.

External Appearance

Indoor and Outdoor Unit Visuals

Displays visual representations of various indoor and outdoor unit types.

Dimensions

Indoor Unit Dimensions

Details dimensions and connection points for various indoor unit types like cassette and concealed duct.

Outdoor Unit Dimensions

Provides dimensions and space requirements for AUUH488C, AUUH728C, AUUH1008C outdoor units.

Product Specifications

Indoor Unit Specifications

Lists detailed technical specifications for various indoor unit types.

Outdoor Unit Specifications

Details technical specifications for outdoor unit models.

Combination table

MPS Variable Combination Options

Outlines possible combinations of indoor and outdoor units with branch kits for MPS Variable systems.

Installation

Indoor Unit Installation Procedures

Provides step-by-step instructions for installing cassette, ceiling/floor, and concealed duct indoor units.

Outdoor Unit Installation Procedures

Guides on selecting location, space, mounting, and lifting for outdoor units.

Piping and Refrigerant Handling

Covers piping length, elevation, connection, and refrigerant charging procedures.

Operation

Main Unit Operations

Explains cooling, dry, heating, defrost, fuzzy operations, and main unit indicators.

Remote Control Operations

Details functions and button operations for CST, Duct, and Convertible type remote controllers.

Special Unit Settings

Covers thermistor system, air volume adjustment, and ESP setting procedures.

Control Devices and Function

Central Control System Overview

Introduces simple and deluxe central control systems, their features, and advantages.

Indoor Unit Address Setting

Explains setting indoor unit addresses using wired/wireless remotes for system communication.

Schematic Diagram

Indoor Unit Schematics

Provides electronic control circuit diagrams for Cassette, Duct, and Convertible indoor units.

Outdoor Unit Schematics

Shows electronic control circuit diagrams for AUUH488C, AUUH728C, AUUH1008C outdoor units.

Wiring Diagrams

Illustrates wiring diagrams for various indoor unit types and outdoor units.

Piping Diagrams

Piping Configurations by Model

Illustrates piping diagrams for AUUH488C, AUUH728C, and AUUH1008C models with various Synchro configurations.

Troubleshooting Guide

Troubleshooting Analysis

Guides on analyzing issues based on temperature difference, operating current, and pressure.

Specific Trouble Diagnosis

Provides troubleshooting steps for common operational issues like no power or remote control failure.

Self-Diagnosis Function and Error Codes

Explains the self-diagnosis function and lists error codes for indoor and outdoor unit faults.

(3-way) Valve Operations

Valve Operations and Procedures

Details valve operations for shipping, purging, pumping down, evacuation, gas charging, and pressure checks.

Function

Indoor Unit Functions

Explains functions like auto swing, soft dry, cooling, heating, and swirl swing for cassette units.

Outdoor Unit Control Logic

Describes normal operation, compressor step control, EEV, fan, reversing valve, defrost, oil, and protection logic.

Exploded View & Replacement Parts List

Indoor Unit - Ceiling Cassette TE Chassis Exploded View

Exploded view of the TE chassis ceiling cassette indoor unit showing all components.

Indoor Unit - Ceiling Cassette TF Chassis Exploded View

Exploded view of the TF chassis ceiling cassette indoor unit with component identification.

Indoor Unit - Ceiling Cassette TD Chassis Exploded View

Exploded view of the TD chassis ceiling cassette indoor unit showing component breakdown.

Parts List - Ceiling Cassette TE Chassis

Replacement parts list for the TE chassis ceiling cassette indoor unit with part numbers.

Parts List - Ceiling Cassette TF Chassis

Replacement parts list for the TF chassis ceiling cassette indoor unit with part numbers.

Parts List - Ceiling Cassette TD Chassis

Replacement parts list for the TD chassis ceiling cassette indoor unit with part numbers.

Outdoor Unit AUUH488C Exploded View

Exploded view of the AUUH488C outdoor unit, showing all major components.

Parts List - AUUH488C Outdoor Unit

Replacement parts list for the AUUH488C outdoor unit with corresponding part numbers.

Outdoor Unit AUUH728C Exploded View

Exploded view of the AUUH728C outdoor unit, illustrating component breakdown.

Parts List - AUUH728C Outdoor Unit

Replacement parts list for the AUUH728C outdoor unit with part numbers.

Outdoor Unit AUUH1008C Exploded View

Exploded view of the AUUH1008C outdoor unit, showing all components.

Parts List - AUUH1008C Outdoor Unit

Replacement parts list for the AUUH1008C outdoor unit with part numbers.

Indoor Unit Components - PT-HEC1 Exploded View

Exploded view of the PT-HEC1 indoor unit components.

Indoor Unit Components - PT-HFC Exploded View

Exploded view of the PT-HFC indoor unit components.

Indoor Unit Components - PT-HDC1 Exploded View

Exploded view of the PT-HDC1 indoor unit components.

Indoor Unit Parts List - PT-HEC1, PT-HFC, PT-HDC1

Replacement parts list for PT-HEC1, PT-HFC, and PT-HDC1 indoor units.

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