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LG LMU36CHV Service Manual

LG LMU36CHV
113 pages
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Multi Air Conditioner
SVC MANUAL(General)
MODEL : Multi-Inverter Type
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 LMU36CHV Specifications

General IconGeneral
Inverter TechnologyYes
TypeMini-Split
Cooling Capacity36000 BTU/h
Heating Capacity36000 BTU/h
Power Supply208/230V, 60Hz
RefrigerantR410A
Operating ModesCooling, Heating, Fan, Dehumidification, Auto
Wi-Fi CapableYes

Summary

General Information

Safety Precautions

Guidance on safety measures and warnings to prevent injury and damage during operation and repair.

Model Line Up

Details on various indoor and outdoor unit models and their specifications for system compatibility.

Nomenclature

Explanation of model naming conventions for indoor and outdoor units for identification.

Functions & Controls

List of Functions & Accessory

Overview of available functions and accessories for different unit types and configurations.

Air Flow Control

Details on airflow direction, swing modes, fan speed settings, and special airflow patterns.

Air Purifying System

Description of the PLASMA Air Purifying System and its mechanism for cleaning air.

Installation Functions

Configuration settings for External Static Pressure (ESP) to optimize installation.

Reliability Features

Information on hot start, self-diagnosis functions, and soft dry operation modes.

Convenience Functions & Controls

Various operational modes like auto, sleep timer, weekly program, and group control for user convenience.

Special Functions & Kits

Advanced features such as low ambient control, space control, and auto elevation grille.

Basic Control

Normal Operation and Control

Principles of compressor, EEV, and fan control for normal operation and system stability.

Oil Return and Defrost Control

Procedures for oil return operation and defrost control cycles to maintain performance.

Protection Controls

High/low pressure, discharge temperature, and input current protection mechanisms for system safety.

Test Run

Pre-Test Checks

Essential checks to perform before initiating a test run, including refrigerant and electrical connections.

Test Run Procedure and Flowchart

Step-by-step guide and visual flowchart for conducting test runs and evaluating performance.

Test Running Specific Types

Specific procedures for test runs on different unit types like SPLIT and Ceiling Cassette.

Trouble Shooting

Self-Diagnosis Function and Error Indicators

Using self-diagnosis and interpreting indoor/outdoor error codes for fault identification.

Pump Down, Evacuation, and Gas Charging

Procedures for refrigerant handling, including pump down, evacuation, and gas charging.

Cycle Part Troubleshooting

Diagnosing issues related to temperature difference, refrigerant cycle, and component performance.

Electronic Parts: Product Operation Issues

Diagnosing issues with product not operating, remote control, and compressor/fan failures.

Electronic Parts: Indoor Error Troubleshooting

Specific troubleshooting steps for indoor unit errors like sensor failures and communication issues.

Electronic Parts: Outdoor Error Troubleshooting

Diagnosing common outdoor unit errors including compressor, fan, sensor, and PCB issues.

Service Order

PCB Service Order

Step-by-step instructions for the proper replacement of a PCB unit.

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