LG FM37AH UE0 User Manual

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

LG FM37AH UE0 Specifications

General

Brand	LG
Model	FM37AH UE0
Category	Air Conditioner
Language	English

Summary

General Information

Safety Precautions

Essential safety guidelines and warnings for servicing the air conditioner unit.

Model Line Up

Control Logic

Compressor Control Logic

Basic principles and starting methods for compressor operation.

Frequency Control Logic

How system frequency is determined based on room conditions and factors.

Reversing Valve Operation

Operation sequence of the reversing valve during different modes and conditions.

Discharge Pipe Control

Input Current Control

Defrost Control Logic

Algorithm and conditions for initiating and completing defrost operation.

LEV Control Logic

Test Run Procedures

Pre-Test Checks

Essential checks before performing a test run on the unit.

Test Run Flow Chart

Test Running Steps

Troubleshooting Guide

Self-Diagnosis Function

Understanding and interpreting self-diagnosis error codes for indoor and outdoor units.

Refrigerant Handling Procedures

Electronic Parts Issues

Troubleshooting common problems related to electronic components and PCBs.

Indoor Error Troubleshooting

Outdoor Error Troubleshooting