LG LS-K1830CL - User Manual

SERVICE MANUAL
Room Air Conditioner
MODEL : LS-J0910CL / HL
LS-L1210CL / HL
LS-K1830CL / HL
LS-K2430CL / HL

LG LS-K1830CL Specifications

General

Type	Split System
Cooling Capacity	18, 000 BTU/h
Heating Capacity	19, 000 BTU/h
Power Supply	220-240V, 50Hz
Outdoor Unit Weight	38 kg
Refrigerant	R410A
Compressor Type	Rotary
Operating Temperature (Cooling)	18-43°C

Summary

Functions

Indoor Unit Functions

Details on various functions and operations of the indoor unit, including fan speed and modes.

Remote Controller Operations

Product Specifications (Cooling Only)

Product Specifications (Cooling & Heating)

Indoor Unit Dimensions

Outdoor Unit Dimensions (9 K, 12 K)

Dimensions and diagrams for the outdoor units of the 9K and 12K models.

Outdoor Unit Dimensions (18 K, 24 K)

Dimensions and diagrams for the outdoor units of the 18K and 24K models.

Refrigeration Cycle Diagram (Cooling Only)

Refrigeration Cycle Diagram (Cooling & Heating)

Diagram of the refrigeration cycle for cooling and heating models, including piping specifications.

Indoor Unit Wiring Diagram

Outdoor Unit Wiring Diagrams (Cooling Only)

Wiring diagrams for the outdoor units (cooling only models) of the air conditioner.

Outdoor Unit Wiring Diagrams (Cooling & Heating)

Wiring diagrams for the outdoor units (cooling & heating models) of the air conditioner.

Operation Details

Main Control Functions

Details on main control functions like time delay, chaos swing, and cooling operation modes.

Auto Operation Modes

Explanation of auto operation procedures for cooling and heating, including fan speed and airflow.

Dehumidification & Vertical Louver Auto Operation

Details on auto operation for dehumidification, heating, and vertical louver auto-swing functions.

Healthy Dehumidification Mode

Description of the healthy dehumidification mode and its operating conditions based on intake air temperature.

Heating & Hot-Start Control

Explanation of heating operation modes and hot-start control functions, including temperature parameters.

Sleep Mode Auto Control

Details on cooling and heating modes combined with sleep mode auto control operations.

Forced & Auto Restart Operation

Procedures for forced operation and auto restart function when the remote control is unusable.

Display and Self-Diagnosis Functions

Installation Safety and Warnings

Installation Parts & Unit Placement

List of installation parts provided and guidelines for selecting the best location for indoor and outdoor units.

Installation Plate & Wall Hole Drilling

Instructions on fixing the installation plate and drilling holes in the wall for piping connections.

Flaring Work and Piping Connection

Detailed steps for performing flaring work on pipes and connecting them correctly to prevent leaks.

Indoor Unit Piping & Drain Hose Connection

Steps for connecting piping and drain hose to the indoor unit, including routing and insulation.

Indoor Unit Piping Routing & Securing

Instructions for routing and securing indoor unit piping and drain hose for rear piping installation.

Indoor Unit Installation & Piping Connection

Steps for installing the indoor unit onto the plate and connecting pipes, including insulation wrapping.

Outdoor Piping Connection & Unit Installation

Procedure for connecting pipes to the outdoor unit and installing the indoor unit onto its plate.

Connecting Indoor & Outdoor Unit Cables

Instructions for connecting electrical cables between the indoor and outdoor units, including wiring diagrams.

Connecting Cable Method & Wiring Terminals

Detailed guide on connecting cables and wiring to terminals, covering solid and strand wiring.

Indoor Unit Cable Connection & Grille Attachment

Steps for connecting cables to the indoor unit and attaching the front grille after installation.

Drainage Check & Piping Formation

Procedures for checking drainage and forming piping, including trap installation for outdoor units.

Air Purging Preparation & Leak Testing

Steps for preparing for air purging, connecting manifold valves, and performing leak tests with nitrogen.

Evacuation & Finishing Air Purging

Procedure for evacuating the system using a vacuum pump and completing the air purging process.

Test Running & Pump Down

Instructions for test running the unit, checking performance, and performing pump down for relocation.

Remote Control Operation (Cooling Models)

Remote Control Operation (Heat Pump Models)

Guide to the names and functions of buttons on the remote control for heat pump models.

Indoor Unit Disassembly (9 K, 12 K)

Grille and Sensor Removal

Steps for removing the grille and accessing internal components like sensors and PCB for 9K/12K models.

Control Box, Discharge Grille, and Evaporator Removal

Instructions for removing the control box, discharge grille, and evaporator from the indoor unit.

Cross-Flow Fan Removal

Procedure for removing the cross-flow fan and fan motor from the indoor unit assembly.

Indoor Unit Disassembly (18 K, 24 K)

Control Box, Grille, and Evaporator Removal

Instructions for removing the control box, discharge grille, and evaporator from 18K/24K indoor units.

Cross-Flow Fan Removal (18 K, 24 K)

Procedure for removing the cross-flow fan and motor from 18K/24K indoor units.

Cycle Troubleshooting Guide

Trouble Analysis and Refrigeration Cycle Checks

Guide to analyzing operational issues by checking temperature differences, pressures, and refrigerant levels.

Troubleshooting: Product Not Operating

Flowchart for diagnosing issues when the product does not operate at all, focusing on power and PCB checks.

Troubleshooting: Remote Control Issues

Steps for diagnosing problems when the product does not operate with the remote controller, checking batteries and connections.

Troubleshooting: Compressor;Fan Motor Issues

Diagnostic steps for compressor or outdoor fan failures, checking sensors, relays, and related circuits.

Troubleshooting: Indoor Fan Operation

Procedure for diagnosing why the indoor fan is not operating, checking voltages and connections.

Troubleshooting: Vertical Louver Operation

Steps to diagnose issues with the vertical louver not operating, checking motors and circuits.

Troubleshooting: Communication Errors

Guide to resolving communication errors between indoor and outdoor units, checking wiring and installation.

Indoor Unit Connection Error Phenomena

Table detailing phenomena observed in the indoor unit due to various connector connection errors.

Outdoor Unit Connection Error Phenomena

Table detailing phenomena observed in the outdoor unit due to various connector connection errors.

Connector Voltage Specifications

Table showing voltage values for various connectors based on indoor fan speed and model.

Indoor Unit Electronic Control Device

Outdoor Unit Main PWB Assembly

Diagram and part list for the outdoor unit's main Printed Wiring Board (PWB) assembly.

Display PWB Assembly

Diagram for the display Printed Wiring Board (PWB) assembly used in various models.

Indoor Unit Schematic Diagram

Outdoor Unit Schematic Diagram

Detailed schematic diagram of the outdoor unit's electrical circuitry and components.

Exploded View and Replacement Parts List

Indoor Unit (9 K) Exploded View & Parts List

Exploded view diagram and parts list for the 9K indoor unit assembly.

Indoor Unit (12 K) Exploded View & Parts List

Exploded view diagram and parts list for the 12K indoor unit assembly.

Indoor Unit (18 K, 24 K) Exploded View & Parts List

Exploded view diagram and parts list for the 18K and 24K indoor unit assemblies.

Outdoor Unit (9 K, 12 K) Exploded View & Parts List

Exploded view diagram and parts list for the 9K and 12K outdoor unit assemblies.

Outdoor Unit (18 K) Exploded View & Parts List

Exploded view diagram and parts list for the 18K outdoor unit assembly.

Outdoor Unit (24 K) Exploded View & Parts List

Exploded view diagram and parts list for the 24K outdoor unit assembly.