LG LM-3022C3L/A3L - User Manual

Multi Type Room Air Conditioner
SERVICE MANUAL
MODEL: LM-2421C2L/A2L
LM-3022C3L/A3L

Summary

Functions

Indoor Unit Functions

Details about the functions and operations of the indoor unit.

Remote Controller Functions

Details about the functions and operations of the remote controller.

Refrigeration Cycle

LM-2421 C2 L;A2 L Cycle

Refrigeration cycle diagram and pipe specs for LM-2421C2L/A2L.

LM-3022 C3 L;A3 L Cycle

Refrigeration cycle diagram and pipe specs for LM-3022C3L/A3L.

Wiring Diagrams

Indoor Unit Wiring

Wiring diagram for the indoor unit.

Outdoor Unit Wiring

Wiring diagrams for outdoor units.

Installation Procedures

Location Selection & Piping Specs

Guidance on location selection and piping length/elevation limits.

Indoor Unit Installation

Mounting Plate and Piping Hole

Steps for installing the indoor unit, including mounting plate and piping holes.

System Setup and Testing

Air Purging & Pipe Length

Procedure for air purging, checking pipe length, and refrigerant charge.

Test Running Procedures

Indoor Unit Disassembly

Refrigeration Cycle Service

Pumping Down Procedure

Evacuation Procedure

Refrigerant Charging

Troubleshooting Guide

Cycle Issue Analysis

System Failure Diagnosis

Step-by-step diagnosis for no cool air, no operation, and communication errors.

Component Failure Diagnosis

Troubleshooting electronic parts, remote control, fan, louver, and outdoor unit issues.

Electronic Control Devices

Indoor & Outdoor PCB Assemblies

Schematic Diagrams

Indoor Unit Schematic

Outdoor Unit Schematics

LG LM-3022C3L/A3L Specifications

General

Type	Split System
Power Supply	220-240V, 50Hz
Refrigerant	R32
Cooling Capacity	3.5 kW
Noise Level (Outdoor)	50 dB