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LG ARUN Series - User Manual

LG ARUN Series
338 pages
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System
Air Conditioner
SVC MANUAL
MODEL : ARUV/ARUN Series
ARNU Series
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

Other manuals for LG ARUN Series

Questions and Answers

  • M
    Melissa HinesJul 26, 2025
    Why does my LG ARUN Air Conditioner show a high pressure error at cooling?
    • B
      brandonfoxJul 26, 2025
      If your LG Air Conditioner's outdoor fan shows a high-pressure error during cooling, it could be due to a motor failure or poor ventilation around the outdoor heat exchanger. First, turn off the outdoor units for a while and then check if the outdoor fan is working. Also, make sure there are no obstructions blocking airflow around the outdoor units.
  • M
    Mario WatkinsJul 30, 2025
    What to do if the outdoor EEV in my LG ARUN has no operating sound at applying power?
    • T
      triveraJul 30, 2025
      If the outdoor EEV in your LG Air Conditioner isn't making any operating sounds when power is applied, the coil might have failed. Check the resistance between the terminals to diagnose this issue.
  • R
    Ryan SimonAug 4, 2025
    Why does the compressor stop during running in my LG ARUN Air Conditioner?
    • S
      shannon81Aug 4, 2025
      If your LG Air Conditioner's compressor stops while running, it might be due to motor insulation failure. Check the resistance between the terminals and the chassis.
  • R
    Ryan WilkinsAug 8, 2025
    What to do if my LG Air Conditioner's outdoor EEV heating fails and defrosts frequently?
    • S
      Susan PayneAug 8, 2025
      If the outdoor EEV in your LG Air Conditioner is experiencing heating failure and causing frequent defrosting, it could be due to a bad connector contact. Inspect the connector to resolve this issue.
  • C
    Carl JonesAug 12, 2025
    What to do if LG ARUN Air Conditioner's outdoor EEV heating fails and the outdoor heat exchanger part is frozen?
    • J
      jeremyporterAug 12, 2025
      If your LG Air Conditioner's outdoor EEV is experiencing heating failure and the outdoor heat exchanger part is frozen, the EEV may be clogged. Service is necessary to resolve this issue.
  • A
    Anthony TaylorAug 17, 2025
    What to do if my LG ARUN Air Conditioner's outdoor EEV has low pressure error or discharge temperature error?
    • T
      Tonya AndersonAug 17, 2025
      If your LG Air Conditioner's outdoor EEV is showing a low-pressure error or discharge temperature error, it could be that the EEV is clogged. Service is necessary to resolve this issue.
  • K
    Kathryn HowellAug 20, 2025
    How to troubleshoot a non-operating compressor in my LG Air Conditioner?
    • J
      James KimAug 21, 2025
      If the compressor in your LG Air Conditioner isn't operating, it could be due to broken motor insulation. Check the resistance between the terminals and the chassis.

Summary

Safety Precautions

Installation

Details safety guidelines for installing the unit, covering electrical work and placement.

Model Names

Indoor Unit

Lists model names and categories for various indoor unit types and their capacities.

Outdoor Unit

Lists model names for outdoor units across different HP capacities.

External Appearance

Indoor Units

Provides visual representations and model names for various indoor unit types like cassette, duct, wall-mounted.

Outdoor Units

Shows visual representations and model names for different outdoor unit capacities and configurations.

Combination of Outdoor Units

Nomenclature

Indoor Unit

Explains the breakdown of the model code for indoor units, including chassis, capacity, and functions.

Outdoor Unit

Explains the breakdown of the model code for outdoor units, including discharge type, capacity, and functions.

Outdoor Units information

Ceiling Mounted Cassette Type (1 Way)

Specifications

Details technical specifications for the 1-way ceiling cassette unit, including capacity, casing, fan, and connections.

Functions

Outlines the operational functions of the indoor unit, such as auto restart, defrost control, and low noise design.

Operation Details

Explains the operational logic for cooling and heating modes, including auto swing and soft-dry operations.

Art Cool Type

Specification

Details technical specifications for the Art Cool series indoor units, including capacity, dimensions, and connections.

Ceiling Concealed Duct Type (Low static)

Specifications

Details technical specifications for low static concealed duct units, including capacity, dimensions, and connections.

Wall Mounted Type

Specification

Details technical specifications for wall-mounted units, including capacity, casing, fan, and connections.

Floor Standing Type

Specifications

Details technical specifications for floor standing units, including capacity, casing, fan, and connections.

Specifications

Cooling Only

Provides specifications for outdoor units operating in cooling-only mode, detailing capacities and electrical requirements.

Functions

Parts Function

Describes the function of various components in the outdoor unit, such as sensors, valves, and compressors.

Dimensions

1 Outdoor Unit(Half Size)

Provides dimensional drawings and measurements for single outdoor units in half-size configurations.

Piping Diagrams

Refrigerant Flow for Each Operation Mode

Illustrates the refrigerant flow path for the unit during cooling, heating, and defrost operations.

Wiring Diagrams

Main Outdoor Unit

Shows the electrical wiring diagram for the main outdoor unit, detailing connections and components.

Function

Basic Control

Explains fundamental control operations like normal operation, compressor control, EEV control, and fan control.

Test Run

1 Checks Before Test Run

Lists essential checks to perform before initiating the test run procedure for the unit.

Troubleshooting guide

The phenomena from main component failure

Lists common phenomena, potential causes, and troubleshooting steps for main component failures.

Checking Method for Key Components

Details how to check key components like compressors, fan motors, and EEVs for proper function and resistance.

Exploded view & Replacement parts list

Exploded View

Shows an exploded view of the main unit, labeling various components with part numbers for easy identification.

LG ARUN Series Specifications

General IconGeneral
BrandLG
ModelARUN Series
CategoryAir Conditioner
LanguageEnglish

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