Table of Contents
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LG
Room Air Conditioner
OWNER'S MANUAL
Dear Owner
Thank you for installing LG air conditioner.
Your best choice guarantees you a great
performance and service to make your life
comfortable & pleasant.
Visit us at http://www.lgservice.com
IMPORTANT
• Please read this owner's manual carefully and thoroughly
before installing and operating your room air conditioner.
• Please retain this owner's manual for future reference after
reading it thoroughly.
LG
P/No.: MFL42262805
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Table of Contents
Related Manuals for LG S12AA
Summarization of Contents
For Your Records
Model and Serial Number Recording
Record model and serial numbers for reference and warranty.
Dealer and Purchase Date Information
Store dealer information and purchase date for warranty claims.
Read This Manual
Manual Usage Guidance
Provides hints for proper use, maintenance, and troubleshooting.
Precautions and Warnings
Service and Installation Precautions
Contact authorized personnel for repair, installation, and supervision.
Power Cord Safety
Ensure power cord replacement uses only authorized personnel and genuine parts.
Safety Precautions
General Safety Instructions
Follow instructions to prevent injury, death, or property damage.
Installation Safety Guidelines
Ensure stable installation, secure panels, and use provided kits.
Component Handling Safety
Handle capacitors with care; use only specified parts.
Wiring and Refrigerant Handling
Secure wiring, use correct refrigerant, avoid leaks, and ensure proper ventilation.
Safe Operation Practices
Avoid blocked airflow, operate in ventilated spaces, and handle power cords carefully.
Unit Handling and Environmental Safety
Lift with two people, keep unit level, avoid water sources, and be cautious with children.
Usage Restrictions and Care
Do not use for special purposes, touch metal parts, or insert objects into the unit.
Filter and Battery Maintenance Safety
Clean filters regularly, replace batteries correctly, and handle leaked battery fluid properly.
Environmental and Cleaning Safety
Avoid flammable gases, use soft cloths for cleaning, and ventilate when needed.
Electrical Safety
Appliance Grounding
Ensure proper grounding of the appliance via a grounded outlet.
Adapter and Extension Cord Use
Discourage adapter/extension cord use; use certified ones if necessary.
Manual Symbol Explanations
Explanation of symbols used in the manual for warnings and notes.
Product Introduction
Indoor Unit Component Overview
Overview of the parts of the indoor unit, including filters, flaps, and outlets.
Indicator Lamp Functions
Description of the meaning of various indicator lights on the unit.
Outdoor Unit Component Overview
Overview of the parts of the outdoor unit, including vents, piping, and base plate.
Operating Instructions
Remote Battery Installation
Instructions on how to insert batteries into the remote controller correctly.
Remote Controller Care
Tips for maintaining the remote controller and its holder for optimal performance.
Basic Operation Method
How to operate the air conditioner using the remote controller.
Remote Control Button Functions
Detailed explanation of each button on the remote control and its function.
Selecting Operation Modes
Description of how to select different operation modes like Cooling, Heating, etc.
Unit Power Control
How to turn the air conditioner unit on and off using the remote.
Operation Mode Selection Guide
Guide to cycling through and selecting various operation modes.
Temperature and Fan Speed Settings
How to adjust the desired room temperature and fan speed.
Chaos Mode for Natural Breeze
Explanation of the Chaos mode for a natural breeze effect.
Healthy Dehumidification Mode
Details on how the dehumidification mode automatically sets temperature and airflow.
Air Circulation Mode
How to use the unit to circulate air without cooling or heating.
Auto Operation Mode (Cooling Only)
How the unit automatically adjusts temperature and fan speed based on room conditions.
Auto Changeover Mode (Heat Pump)
How the unit automatically switches between heating and cooling.
Jet Cool and Jet Heat Operations
How to use Jet Cool/Heat for quick temperature adjustments.
Smart Clean Operation Overview
Description of the automated process for cleaning the air filter.
Manual Smart Clean Operation
How to start the Smart Clean function manually via the remote.
Auto Smart Clean Operation
How the Smart Clean function automatically activates after 30 hours of operation.
Auto Clean Operation
Auto Clean removes moisture and cleans the unit after cooling/dehumidification.
Energy-Saving Cooling Mode
How to enable energy-saving mode for efficient cooling and dehumidification.
Display Luminosity Adjustment
How to adjust the brightness of the unit's display and indicator LEDs.
Forced Operation Mode
How to start or stop the unit using the ON/OFF button when the remote is unusable.
Setting the Current Time
Steps to set the current time on the air conditioner's control system.
Timer Setting Procedure
How to set the timer for automatic operation or shutdown.
Canceling Timer Settings
Instructions on how to cancel existing timer settings.
Sleep Mode Operation
How to set the sleep mode for comfortable night-time operation.
Vertical Airflow Direction Control
How to adjust the up/down airflow direction using the remote.
Horizontal Airflow Direction Control
How to adjust the left/right airflow direction using the remote.
Auto Restart Functionality
How the unit restores previous settings after a power interruption.
Maintenance and Service
Indoor Unit Cleaning and Care
Instructions for cleaning the indoor unit with a soft dry cloth.
Air Filter Maintenance
How to clean and replace air filters for optimal efficiency.
Deodorizer Filter Maintenance
Instructions for maintaining deodorizer filters by exposing them to sunlight.
Dust Box Cleaning
Guidance on when and how to clean the dust box.
Filter Removal and Installation
Step-by-step guide on how to remove the air filters from the unit.
Filter Installation Notes
Important notes for correctly reinstalling filters to ensure proper operation.
Dust Sucking Inlet Cleaning
How to clean the dust sucking inlet using the provided brush and vacuum.
Outdoor Unit Maintenance
Guidance on checking and cleaning the outdoor unit's heat exchanger and vents.
Operation Tips
Efficient Operation Tips
Tips like avoiding overcooling, keeping blinds closed, and shutting doors/windows.
Uniform Temperature Tips
How to ensure uniform room temperature and effective cooling.
Self-Diagnosis and Troubleshooting
Self-Diagnosis Error Codes
Explanation of LED blinking patterns indicating potential thermistor failures.
Troubleshooting: Unit Not Starting
Causes and solutions for the air conditioner not starting.
Troubleshooting: Cooling Issues
Troubleshooting steps for when the unit is not cooling effectively.
Troubleshooting: Brush Issues
Solutions for issues related to the brush mechanism not working.
When to Call for Service
Situations requiring immediate professional service, like unusual smells or cord damage.
Need help?
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Questions and answers