LG Single "A" User Manual

Single "A" Air Conditioner
SVC MANUAL(General)
MODEL : Single "A"-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 Single "A" Specifications

General

Brand	LG
Model	Single "A"
Category	Air Conditioner
Language	English

Summary

Part 1 General Information

Safety Precautions

Guidelines to prevent injury and property damage during repair.

Part 3 Control logic

Compressor

Basic principles of compressor operation and inverter control.

Step(frequency) control

How the system controls compressor frequency based on various parameters.

Reversing valve operation

Discharge pipe control

Input Current Control

Outdoor Fan Control

Defrost Control

Conditions and algorithms for initiating and completing defrost cycles.

LEV Control

Operation of the Linear Expansion Valve (LEV) for precise refrigerant control.

Compressor warm-up control logic (at low temperatures)

Heat sink control

Part 5 Trouble Shooting

Self-diagnosis Function

How the unit self-diagnoses errors and displays error codes.

Pumping Down

Procedure for safely recovering refrigerant into the outdoor unit.

Evacuation

Steps for removing air and moisture from the refrigerant circuit.

Gas Charging

Instructions for charging the system with the correct amount of refrigerant.

Electronic Parts