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LG CT18 NQ2 - User Manual

LG CT18 NQ2
146 pages
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Air Conditioner
SVC MANUAL(General)
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 CT18 NQ2 Specifications

General IconGeneral
Operating Voltage220-240V
RefrigerantR410A
Control TypeRemote Control
TypeSplit AC
Cooling Capacity18000 BTU/hr
Heating Capacity19000 BTU/hr
Operating Frequency50Hz
Power Consumption (Cooling)1600W
Dehumidification Capacity1.8 l/hr
Additional FeaturesAuto Restart, Sleep Mode, Timer

Summary

Part 1 General Information

Safety Precautions

Detailed safety guidelines for servicing air conditioners, including warnings and cautions.

Model Line Up

Lists and categorizes various indoor and outdoor unit models with their specifications.

Nomenclature

Explains the coding system used for indoor and outdoor unit model names.

Part 2 Functions & Controls

Function and Accessory List

Details functions and accessories available for different indoor unit types.

Air Flow Control Modes

Explains various air flow control modes like auto swing and chaos wind.

Installation Functions

Covers functions related to unit installation, like ESP and high ceiling settings.

Convenience Functions

Details user-friendly features like auto cleaning, sleep timer, and weekly programs.

Part 3 Basic Control

Normal Operation

Explains the basic operating principles of the compressor, fan, and EEV.

Compressor Control

Details compressor operation using fuzzy logic and linear control for stable system performance.

EEV Control

Describes how the EEV controls superheat in cooling and discharge pipe temp in heating.

Part 4 Trouble Shooting

Self-Diagnosis Function

Explains how the unit self-diagnoses errors and indicates them via LED displays.

Pump Down Procedure

Provides a procedure for pump down operation to recover refrigerant safely.

Evacuation and Gas Charging

Details the process of evacuating and charging the system with refrigerant.

Electronic Parts Troubleshooting

Covers troubleshooting for electronic components and PCB assemblies.

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