LG FM57AH U33 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 FM57AH U33 Specifications

General

Capacity	1.5 Ton
Star Rating	3 Star
Refrigerant	R32
Type	Split Air Conditioner
Power Supply	230V, 50Hz

Summary

Part 1 General Information

Safety Precautions

Essential safety guidelines and warnings for servicing the unit.

Model Line Up

Part 2 Functions & Controls

List of Functions & Controls

Comprehensive table of all unit functions and their descriptions.

Part 3 Control logic

Compressor

Basic principles of compressor operation and starting.

Step(frequency) control

How frequency is controlled based on room conditions.

Defrost Control

Part 4 Test Run

Check before Test Run

Pre-run checks for refrigerant leakage and connections.

Test Run Flow chart

Visual guide for performing the test run procedure.

Test Running

Part 5 Trouble Shooting

Self-diagnosis Function

System for identifying and displaying error codes for troubleshooting.

Pump Down

Procedure for safely gathering refrigerant into the outdoor unit.

Evacuation

Process of removing air and moisture from the system.

Gas Charging

Electronic Parts