LG Split Air Conditioner Wall Mount Unit LS-C126UCM0.ACHCLAL User Manual - English Product Specifications
Summary
Designed for optimal performance and safety, this comprehensive manual is the essential guide for all room air conditioner owners. It provides detailed instructions on proper installation, safe operation, and routine maintenance—including crucial warnings regarding electrical usage and filter cleaning. Inside, users will find straightforward troubleshooting tips for common issues like power failures or restricted airflow, ensuring you can maximize your unit’s efficiency and extend its lifespan with confidence.
Page 1 Text Content
website http://www.lgservice.com
LG Room Air Conditioner OWNER'S MANUAL
MODELS: SU/SZ Chassis Prior to installation, this air-
conditioning unit must be
submitted for approval by the utility service which provides electricity (EN 61000-2,
EN 61000-3 Norm).
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.
Page Summary Contents For LG Split Air Conditioner Wall Mount Unit LS-C126UCM0.ACHCLAL User Manual - English Product Specifications
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website http://www.lgservice.com LG Room Air Conditioner OWNER'S MANUAL MODELS: SU/SZ Chassis Prior to installation, this air- conditioning unit must be submitted for approval by the utility service w...
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FOR YOUR RECORDS Safety Precautions.........................3 Write the model and serial numbers here: Model Serial Prior to Operation ..........................8 You can find them on label on the sid...
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Safety Precautions Safety Precautions To prevent the injury of the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instructio...
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Safety Precautions Always install an air leakage Do not keep or use Ensure that an installation breaker and dedicated flammable gases or frame of the outdoor unit is switching board. combustibles near...
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Safety Precautions Take the power plug out if Do not use the power cord Do not open the suction necessary, holding the head near the heating tools. inlet of the indoor/outdoor of the plug and do not t...
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Safety Precautions When the product is submerged into water, Take care so that children may not step on always contact the service center. the outdoor unit. Otherwise, it may cause fire or electrical ...
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Safety Precautions Operation Avoid excessive cooling Use soft cloth to clean. Do When gas leaks, open the and perform ventilation not use wax, thinner, or window for ventilation sometimes. strong dete...
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Prior to Operation Prior to Operation Preparing for Operation 1. Contact an installation specialist for installation. 2. Plug in the power plug properly. 3. Use dedicated circuit. 4. Do not use an ext...
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Introduction Introduction Symbols used in this Manual This symbol alerts you to the risk of electric shock. ENGLISH This symbol alerts you to hazards that may cause harm to the air conditioner. This s...
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Electrical Safety Electrical Safety WARNING: This appliance must be properly grounded. To minimize the risk of electric shock, you must alway plug into grounded oulet. Preferred method Ensure proper g...
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Electrical Safety Temporary Use of an Adapter We strongly discourage the use of an adapter due to potential safety hazards. For temporary connections, use only UL-listed adapter, available from most l...
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Operating Instructions Operating Instructions How to insert the Batteries 1. Remove the battery cover by pulling it according to the arrow direction. 2. Insert new batteries making sure that the and o...
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Operating Instructions Remote Control Operations The controls will look like the following. 1. START/STOP BUTTON Controls Operation starts when this button is pressed and stops when the button is pres...
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Operating Instructions Cooling operation Press the Start/Stop button. The unit will respond with beep. Open the door of the remote controller. To select Cooling Operation, press the Operation Mode Sel...
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Operating Instructions Auto operation (Cooling model only) Press the Start/Stop button. The unit will respond with beep. ENGLISH Open the door of the remote controller. To select Auto Operation, press...
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Operating Instructions Auto changeover operation(Heat pump model only) Press the Start/Stop button. The unit will respond with beep. Open the door of the remote controller. To select Auto Changeover O...
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Operating Instructions Healthy dehumidification operation Press the Start/Stop button. The unit will respond with beep. ENGLISH Open the door of the remote controller. To select Healthy Dehumidificati...
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Operating Instructions Heating operation (Heat pump model only) Press the Start/Stop button. The unit will respond with beep. Open the door of the remote controller. To select Heating Operation, press...
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Operating Instructions Jet cool operation Press the Start/Stop button. The unit will respond with beep. ENGLISH Press the Jet Cool button to operate the speed cooling mode and the unit will operate at...
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Operating Instructions NANO PLASMA purification operation(Optional) Press the Start/Stop button. The unit will respond with beep. Open the door of the remote controller. Press the NANO PLASMA button. ...
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Operating Instructions 2nd operation Press the Start/Stop button. The unit will respond with ENGLISH beep. Open the door of the remote control and press the 2nd Function button to operate functions pr...
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Operating Instructions Additional Features Sleep mode 1. Press the Sleep Mode Auto button to set the time you want the unit to stop automatically. 2. The Timer is programmed in one-hour increments by ...
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Operating Instructions Vertical Airflow Direction Control The up/down airflow (Vertical Airflow) can be NOTICE adjusted by using the remote control. If you press the CHAOS swing button, the horizontal...
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Operating Instructions Auto clean (Optional) 1. Whenever you press the Auto Clean button, Auto Clean Function will be AUTO CLEAN reserved and cancelled. 2. Auto Clean function works before and after c...
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Operating Instructions Forced operation Operation procedures when the remote control can't be used. The operation will be started if the power button is pressed. If you want to stop operation, re-pres...
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Maintenance and Service Maintenance and Service Indoor Unit WARNING: Turn the system off before cleaning. To clean, wipe with soft, dry cloth. Do not use bleach or abrasives. Supply power must be disc...
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Maintenance and Service Outdoor Unit The heat exchanger coils and panel vents of the outdoor unit should be checked regularly. If clogged with dirt or soot, the heat exchanger and panel vents may be p...
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Maintenance and Service Common Problems and Solutions Before calling for service If you have problems with your air conditioner, read the following information and try to solve the problem. If you can...
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Maintenance and Service Troubleshooting The air conditioner may be operating abnormally when: Problem Causes What To Do Possible The air conditioner is Make sure the air conditioner plug is unplugged....
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Room Air Conditioner
Manual Details
| Brand | LG |
|---|---|
| Pages | 30 |
| File Size | 603.98 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What safety precautions must be followed during installation?
Grounding, using approved power cords with undamaged sockets, and having the electrical work performed by authorized qualified personnel according to the National Electric Code are mandatory.
What should I do if the air conditioner fails to cool properly?
Check if the room is too hot (to allow time for cooling) or clean the air filter, as indicated in the manual's troubleshooting section.
Why does my AC unit start making strange sounds or smells during operation?
The manual warns that unusual smoke, smells, or noises require immediate unplugging and contacting authorized service personnel.
What causes a common issue of cold air returning to the indoor unit?
This indicates open registers or floor vents are allowing unintended airflow back into the system.
Who should perform maintenance or repairs on this air conditioner?
Only an authorized service technician should perform maintenance, and installation must be done by an installer.