LG ARNU28GM2A4 User Manual

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OWNER'S MANUAL

AIR CONDITIONER

Read this owner's manual thoroughly before operating the

appliance and keep it handy for reference at all times.

ENGLISH

ARNU07GM1A4 ARNU09GM1A4 ARNU12GM1A4 ARNU15GM1A4

ARNU18GM1A4 ARNU24GM1A4 ARNU28GM2A4 ARNU36GM2A4

ARNU42GM2A4 ARNU48GM3A4 ARNU54GM3A4 ARNU60GM3A4 ARNU05GL1G4

ARNU07GL1G4 ARNU09GL1G4 ARNU12GL2G4 ARNU15GL2G4 ARNU18GL2G4

ARNU21GL3G4 ARNU24GL3G4 ARNU76GB8A4 ARNU96GB8A4

MFL72075614

Rev.00_083123

www.lg.com

Copyright © 2017-2023 LG Electronics Inc. All Rights Reserved.

Table of Contents

Other manuals for LG ARNU28GM2A4

Installation Manual25 pages

Questions and Answers:

C
Cathy McintoshAug 5, 2025
How to fix an LG Air Conditioner that won't turn on?
- R
  Richard SantosAug 5, 2025
  If your LG Air Conditioner isn't working, first, ensure the power cord is properly plugged into the outlet and that power isolators are switched on. Check the circuit breaker and replace the fuse if it's blown. If a power failure occurred, turn off the appliance, wait 3 minutes after the power is restored, and then turn it back on. Also, verify that the batteries in the remote control are correctly inserted or replace them. Make sure that air inlet or outlet vents are not obstructed. Finally, confirm that the appliance wasn't turned off automatically by a timer and turn it on.
J
Jeffery PearsonAug 9, 2025
Why is my LG ARNU28GM2A4 not blowing cold air?
- R
  Rebecca ColemanAug 9, 2025
  If your LG Air Conditioner is not emitting cool air, ensure that curtains, blinds, or furniture are not blocking the unit. Clean the air filter every 2 weeks. If the room temperature is too high, select Jet mode for faster cooling and allow the unit time to cool the room, especially when first turned on. Check that the desired temperature is lower than the current temperature and that no cold air is escaping through ventilation points. Avoid using heat generators nearby. If Fan mode is selected, switch to a cooling operation. The cooling effect may not be sufficient if the outside temperature is too high.
S
susanmurphyAug 13, 2025
Why does my LG ARNU28GM2A4 Air Conditioner keep turning off?
- J
  Jenna CurtisAug 13, 2025
  If your LG Air Conditioner stops during operation, the Off Timer function may have timed out; check the timer settings. If you made a mistake in timer operation, set the timer correctly. If a power failure occurred, wait for the power to return. With Auto Restart enabled, the appliance will resume operation a few minutes after power is restored.
S
Susan BrowningAug 17, 2025
Why is my LG Air Conditioner remote control not working?
- L
  Lonnie MooreAug 17, 2025
  If the remote control display for your LG Air Conditioner is faint or not showing at all, replace the batteries with new ones. Ensure that the batteries are inserted with the correct + and - orientation.
J
jamesroseAug 22, 2025
Why can't I adjust the fan speed on my LG ARNU28GM2A4?
- T
  Tyler AllenAug 22, 2025
  If the fan speed on your LG Air Conditioner cannot be adjusted, it might be because Jet mode or Auto Operation mode is selected. In these modes, fan speed adjustments are limited, so select a different operating mode. Also, the airflow may be automatically adjusted to prevent cool airflow during heating or to minimize energy consumption during cooling.
A
Amy CainAug 27, 2025
Why is my LG ARNU28GM2A4 Air Conditioner not blowing hot air?
- L
  lisa34Aug 27, 2025
  If your LG Air Conditioner isn't emitting warm air, and the vane is almost closed at the start of Heating mode, this is normal; wait for the appliance to generate enough warm air. If the outdoor unit is in Defrosting mode due to low outside temperatures, wait approximately 15 minutes for it to finish. Note that the heating effect may not be sufficient if the outside temperature is too low.
M
Mark FordAug 31, 2025
Why does my LG ARNU28GM2A4 smell?
- M
  Matthew HillAug 31, 2025
  If your LG Air Conditioner's indoor unit smells, it may be due to absorbed odours like cigarette smoke being discharged with airflow. Try washing the filter. If the smell persists, contact a service center to clean the heat exchanger. Also, check for damp smells from walls, carpet, furniture, or cloth items, and clean them if necessary.

LG ARNU28GM2A4 Specifications

General

Brand	LG
Model	ARNU28GM2A4
Category	Air Conditioner
Language	English

Summary

Safety Instructions

General Safety Guidelines

Explains safety symbols and guidelines for preventing risks and damage.

Warning Instructions

Flammable Refrigerant Safety

Warning Safety Precautions

Instructions to prevent explosion, fire, death, electric shock, injury, or scalding.

Technical Safety Precautions

Guidelines for appliance use by children, supervision, and qualified technician involvement.

Installation and Grounding Safety

Precautions for installation, repairs, grounding, and power cord replacement.

Installation Site and Electrical Safety

Rules for installation location, electrical outlets, circuit breakers, and wiring connections.

Operation Safety Precautions

Operational Safety and Maintenance Warnings

Gas Leak and Storm Safety

Maintenance and Refrigerant Handling

Safety steps for maintenance and proper handling of refrigerants.

R32 Refrigerant Specifics

Caution Instructions

Air Filter Cleaning Steps

Troubleshooting

Initial Checks Before Service

Operation Troubleshooting

Operation Troubleshooting (continued)

Performance Issues

Calling for Service

When to Contact Service

Situations requiring professional service, including abnormal operations and system failures.

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