LG LS-K2430CL - User Manual

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

LG LS-K2430CL Specifications

General

Compressor Type	Rotary
Type	Split System
Cooling Capacity	24000 BTU
Operating Temperature (Cooling)	18°C to 43°C
Operating Temperature (Heating)	24°C

Summary

Unit Functional Overview

Indoor Unit Operation Controls

Controls for operating the indoor unit, including fan speed and ON/OFF.

Temperature Sensing and Control

Sensing room temperature and maintaining the set temperature for comfort.

Safety and Delay Features

Features like time delay for compressor start and restart inhibition for safety.

Special Operation Modes

Special modes like Dehumidification, Sleep, Auto Air, and Chaos Swing for enhanced operation.

Operation Indicator Lamps

Explains the meaning of various operation indicator lamps (LEDs) on the unit.

Remote Control Operations

Basic Control Functions

Basic operations like turning the unit ON/OFF, selecting modes, and fan speed.

Temperature and Timer Settings

Functions for setting temperature, choosing units (°C/°F), and managing timers.

Advanced Mode Selection

Advanced modes like Sleep, Chaos Swing, and Fan-only operation for comfort.

Cooling Only Product Specifications

Electrical and Performance Data

Electrical requirements, cooling capacity, current draw, efficiency, and noise levels.

Unit Features and Control Details

Unit features like temperature control, airflow, remote operation, self-diagnosis, and timers.

Installation and Physical Specifications

Specifications for refrigerant, wiring, tubing, dimensions, and weight for installation.

Cooling & Heating Product Specifications

Performance and Electrical Data

Electrical requirements, cooling/heating capacity, efficiency (EER/COP), and current draw.

Unit Features and Operational Modes

Unit features including air circulation, noise, temperature control, and operational modes.

Installation and Physical Parameters

Specifications for refrigerant, wiring, tubing, dimensions, and weight for installation.

Indoor Unit Dimensions

Dimensional Specifications

Detailed dimensions (Width, Height, Depth) for the indoor unit.

Outdoor Unit Dimensions (9 K, 12 K)

Dimensional Specifications

Dimensions (W, H, D, L1-L5) for the 9K and 12K outdoor units.

Outdoor Unit Dimensions (18 K, 24 K)

Dimensional Specifications

Dimensions (W, H, D, L1-L10) for the 18K and 24K outdoor units.

Refrigeration Cycle (Cooling Only)

System Diagram and Components

Diagram showing the refrigeration cycle for cooling-only models.

Piping and Refrigerant Specifications

Details on pipe sizes, piping length, elevation, and refrigerant quantity.

Refrigeration Cycle (Cooling & Heating)

System Diagram and Operation

Diagram showing the refrigeration cycle for cooling & heating models.

Piping and Refrigerant Details

Pipe sizes, piping length, elevation, and refrigerant quantity for dual models.

Indoor Unit Wiring Diagram

Internal Wiring Connections

Diagram detailing the internal wiring connections of the indoor unit.

Outdoor Unit Wiring (Cooling Only)

9 K, 12 K Models Wiring

Wiring diagram specifically for the 9K and 12K cooling-only outdoor units.

18 K, 24 K Models Wiring

Wiring diagram specifically for the 18K and 24K cooling-only outdoor units.

Outdoor Unit Wiring (Cooling & Heating)

9 K, 12 K Models Wiring

Wiring diagram for 9K and 12K cooling & heating outdoor units.

18 K, 24 K Models Wiring

Wiring diagram for 18K and 24K cooling & heating outdoor units.

Main Control Functions

Time Delay and Safety Controls

Details on time delay safety controls for compressor and fan operations.

Chaos Swing and Cooling Modes

Operation of Chaos Swing mode and standard cooling mode details.

Indoor Heat Exchanger Frost Protection

Mechanism to protect the indoor heat exchanger from frosting.

Auto Operation Modes

Auto Operation Procedure

Step-by-step procedure for auto operation mode.

Cooling Auto Operation Logic

Logic for auto operation in cooling mode based on intake air temperature.

Additional Auto Operation Modes

Dehumidification and Heating Auto Ops

Auto operation logic for Dehumidification and Heating modes.

Vertical Louver Auto Swing Control

How to activate and stop vertical louver auto-swing.

Healthy Dehumidification Mode

Mode Operation Logic

How the unit operates in Healthy Dehumidification mode based on intake air temp.

Fan and Compressor Behavior

Describes fan and compressor actions during dehumidification operation.

Heating and Hot-Start Controls

Heating Operation Logic and Diagram

Operational diagram and logic for the Heating mode.

Hot-Start Operation Details

Details on the Hot-Start control for heating operation.

Sleep Mode Operation

Cooling Mode with Sleep Function

Operation diagram for Cooling Mode combined with Sleep Mode.

Heating Mode with Sleep Function

Operation diagram for Heating Mode combined with Sleep Mode.

Manual Operation Modes

Forced Operation Procedure

How to operate the unit when the remote control is not usable.

Auto Restart Functionality

How the unit automatically restarts after a power failure.

Display and Sound Indicators

Unit Indicators and Symbols

Explains the meaning of various display indicators and symbols.

Buzzer Sound Alerts

Describes the sounds the unit makes for different events.

Self-Diagnosis Functionality

Error Codes and Diagnosis

Lists error codes, their diagnosis, LED blinks, and unit operation.

Installation Safety and Warnings

General Installation Precautions

Important safety notes and warnings for installation personnel.

Wiring and Transporting Safety

Safety guidelines for wiring, grounding, and handling units during transport.

Installation Environment Guidelines

Recommendations for installing the unit in various environments.

Refrigerant Tubing and Servicing Safety

Safety measures for connecting refrigerant tubing and servicing.

Installation Site and Piping Requirements

Indoor Unit Location Selection

Guidelines for selecting the best location for the indoor unit.

Outdoor Unit Location Selection

Guidelines for selecting the best location for the outdoor unit.

Piping Length and Elevation Limits

Specifications for piping length and elevation difference between units.

Mounting and Wall Penetration

Installing the Mounting Plate

Steps for securely mounting the installation plate on the wall.

Drilling the Wall Hole

Instructions for drilling the correct hole through the wall for piping.

Piping Connection - Flaring Process

Flaring Work Procedure

Detailed steps for performing flaring work on refrigerant pipes.

Burrs Removal and Nut Installation

Steps for removing burrs and installing flare nuts correctly.

Flaring Work Quality Check

How to check the quality of the flaring work.

Indoor Unit Piping and Installation

Routing Indoor Unit Piping and Drain Hose

Instructions for routing and preparing indoor unit piping and drain hose.

Securing and Insulating Piping Bundles

Taping and insulating the bundled piping and drain hose.

Mounting the Indoor Unit

Steps for physically mounting the indoor unit onto the installation plate.

Connecting Indoor Piping and Drain

Connecting the refrigerant pipes and drain hose to the indoor unit.

Indoor Unit Piping Details

Final Flare Nut Tightening

Proper method for tightening flare nuts with a torque wrench.

Piping and Cable Bundling Techniques

Techniques for wrapping and bundling pipes and cables.

Right Rear Piping Installation Steps

Specific steps for routing and connecting piping for right rear installation.

Indoor Unit Installation and Piping

Connecting Indoor Unit Cable

Steps for inserting and preparing the connecting cable for the indoor unit.

Indoor Unit Mounting and Securing

How to hang and secure the indoor unit to the installation plate.

Connecting Indoor Pipes and Drain Hose

Final steps for connecting refrigerant pipes and drain hose.

Insulating Connection Points

Wrapping insulation material around connection points.

Indoor Unit Chassis Piping Management

Routing Piping to Chassis Back

Rerouting pipes and drain hose across the back of the indoor unit chassis.

Securing Piping with Tubing Holder

Using the tubing holder to secure pipes and drain hose.

Final Indoor Unit Mounting Steps

Final steps for seating the indoor unit onto the installation plate.

Inter-Unit Cable Connection

Outdoor Unit Cable Preparation

Steps for preparing the outdoor unit for cable connection.

Indoor Unit Power and Signal Wire Connection

Connecting power supply and low voltage lines to the indoor unit terminals.

Wiring Safety and Cable Sizing Guidelines

Safety guidelines for running wires and determining correct wire size.

Wiring Connection Methods

Connecting Cable Example Procedure

An example showing the method for connecting the control cable.

Terminal Wiring Techniques for Wires

Instructions on how to connect solid core and strand wiring to terminals.

Final Indoor Unit Assembly

Indoor Unit Wiring Connection Steps

Connecting the outdoor unit cable wires to indoor unit terminals.

Attaching the Front Grille

Steps for attaching the front grille to the indoor unit cabinet.

Drainage Check and Piping Formation

Checking Indoor Unit Drainage System

How to check the indoor unit's drainage system for proper function.

Outdoor Unit Piping Formation Techniques

Forming the piping for outdoor unit installation, including insulation.

Outdoor Unit Below Indoor Unit Piping

Piping formation when the outdoor unit is lower than the indoor unit.

Outdoor Unit Above Indoor Unit Piping

Piping formation when the outdoor unit is higher than the indoor unit.

Air Purging and Leak Testing

Preparation and Nitrogen Leak Test

Steps for preparing the system and performing a nitrogen leak test.

Evacuation and System Finishing

System Evacuation Procedure

Steps to evacuate the refrigerant system using a vacuum pump.

Finalizing Connections and Valve Operations

Steps to finish the job by opening valves and securing caps.

Test Running and Pump Down

Initial Checks and Remote Preparation

Checks for correct connections and preparing the remote control.

Outdoor Unit Securing and Anchoring

How to securely anchor the outdoor unit.

Performance Evaluation Metrics

Checking performance metrics like pressure and air temperature difference.

Pump Down Procedure for Service

Procedure for collecting refrigerant for relocation or servicing.

Remote Control Operations (Cooling Models)

Signal Transmitter Functionality

How the remote control transmits signals to the air conditioner.

Remote Control Button Functions

Detailed explanation of each button on the cooling model remote control.

Remote Control Operations (Heat Pump Models)

Remote Control Button Functions

Detailed explanation of each button on the heat pump model remote control.

Indoor Unit Disassembly (9 K, 12 K Models)

Safety Warning Before Disassembly

Important safety warning before disassembling the unit.

Removing the Front Grille

Steps to remove the front grille from the indoor unit chassis.

Removing Internal Components

How to remove sensors, conductors, motor, and PCB.

Indoor Unit Component Removal (9 K, 12 K)

Removing the Control Box

Steps to remove the control box from the indoor unit.

Removing the Discharge Grille

Steps to remove the discharge grille from the indoor unit.

Removing the Evaporator Assembly

Steps to remove the evaporator from the indoor unit.

Indoor Unit Fan Disassembly (9 K, 12 K)

Removing the Cross-Flow Fan and Motor

Steps to remove the cross-flow fan and fan motor.

Indoor Unit Disassembly (18 K, 24 K Models)

Safety Warning Before Disassembly

Important safety warning before disassembling the unit.

Removing the Front Grille

Steps to remove the front grille from the indoor unit chassis.

Removing Internal Components

How to remove sensors, conductors, motor, and PCB.

Indoor Unit Component Removal (18 K, 24 K)

Removing the Control Box

Steps to remove the control box from the indoor unit.

Removing the Discharge Grille

Steps to remove the discharge grille from the indoor unit.

Removing the Evaporator Assembly

Steps to remove the evaporator from the indoor unit.

Indoor Unit Fan Disassembly (18 K, 24 K)

Removing the Cross-Flow Fan and Motor

Steps to remove the cross-flow fan and fan motor.

Refrigeration Cycle Troubleshooting

Temperature and Current Analysis

Analyzing temperature difference and operating current for troubleshooting.

Pressure and Temperature Checks

Checking suction pressure and temperature against normal values.

Product Not Operating Troubleshooting

Initial Power and Sound Checks

Checking power voltage, connections, and beep sounds when unit is off.

Load Component Checks

Checking fan motors, compressor, and connectors for operation.

PCB Board Operation Checks

Checking voltages and components on the PCB for faults.

Remote Control Operation Issues

Remote Control Malfunction Diagnosis

Troubleshooting steps when the remote control is not working.

Checking Remote Control Circuitry

Checking connectors, PWB, and wiring for the remote control.

Compressor and Outdoor Fan Failure Troubleshooting

Indoor Temperature Sensor Check

Verifying the indoor temperature sensor and its connection.

Relay and Compressor Circuit Check

Checking the compressor relay and related circuits for failure.

Indoor Fan Operation Troubleshooting

Indoor Fan Motor and Connector Checks

Verifying voltages and connections for the indoor fan motor.

Interference and PWB Checks

Checking for fan interference and PWB conditions.

Vertical Louver Operation Troubleshooting

Louver Gear and Torque Check

Confirming proper gearing and torque for the vertical louver.

Louver Circuit and Assembly Checks

Checking louver circuit, connectors, and assembly for issues.

Communication Error Troubleshooting

Checking Wiring and Installation Conditions

Verifying connecting wires and installation conditions for communication errors.

Power Cycling and PWB Assembly Check

Steps involving power cycling and checking PWB assemblies.

Indoor Unit Connection Error Phenomena

CN-DC;DC Connector Error Phenomena

Phenomena related to open or connection errors in CN-DC/DC.

CN-MOTOR and CN-UP;DOWN Errors

Phenomena for CN-MOTOR and CN-UP/DOWN connector issues.

CN-DISP and CN-TH Error Phenomena

Phenomena for CN-DISP and CN-TH connector issues.

Outdoor Unit Connection Error Phenomena

CN-POWER and RY-COMP Errors

Phenomena for CN-POWER and RY-COMP terminal issues.

CN-TRANS and CN-FAN Errors

Phenomena for CN-TRANS and CN-FAN connector issues.

CN-DC;DC Wiring Error Phenomena

Phenomena related to connecting errors in CN-DC/DC wiring.

Connector Voltage Specifications

CN-MOTOR Connector Voltages

Voltage values for CN-MOTOR connector based on fan speed.

CN-DC;DC Connector Voltages

Voltage values for CN-DC/DC connectors based on fan speed.

Indoor Unit Main PWB

Indoor Main PWB Diagram

Schematic diagram of the indoor unit's main PWB.

Indoor Main PWB Service Parts List

List of service parts for the indoor unit's main PWB.

Outdoor Unit Main PWB

Outdoor Main PWB Diagram

Schematic diagram of the outdoor unit's main PWB.

Outdoor Main PWB Service Parts List

List of service parts for the outdoor unit's main PWB.

Display PWB Assembly

Display PWB Diagram and Part Number

Diagram and part number for the display PWB assembly.

Indoor Unit Schematic Diagram

Indoor Unit Electrical Circuitry

Detailed schematic of the indoor unit's electrical circuits.

Outdoor Unit Schematic Diagram

Outdoor Unit Electrical Circuitry

Detailed schematic of the outdoor unit's electrical circuits.

Indoor Unit (9 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 9K indoor unit.

9 K Indoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for the 9K indoor unit.

Indoor Unit (12 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 12K indoor unit.

12 K Indoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for the 12K indoor unit.

Indoor Unit (18 K, 24 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 18K/24K indoor units.

18 K, 24 K Indoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for 18K/24K indoor units.

Outdoor Unit (9 K, 12 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 9K/12K outdoor units.

9 K, 12 K Outdoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for 9K/12K outdoor units.

Outdoor Unit (18 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 18K outdoor unit.

18 K Outdoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for the 18K outdoor unit.

Outdoor Unit (24 K) Exploded View

Component Breakdown Diagram

Exploded view showing the assembly of the 24K outdoor unit.

24 K Outdoor Unit Parts List

Component Part Numbers and Quantities

List of part numbers, names, and quantities for the 24K outdoor unit.