LG R18AWN-NC9 Owner’s Manual
P/NO : MFL42262819
www.lg.com
OWNER’S MANUAL
AIR CONDITIONER
Please read this manual carefully before operating
your set and retain it for future reference.
TYPE : WALL MOUNTED
2 Air Conditioner
Air Conditioner Owner’s Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
■ Staple your receipt to this page in the event you need
it to prove date of purchase or for warranty issues.
READ THIS MANUAL
Inside you will find many helpful hints on how to use
and maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call
for service at all.
PRECAUTION
• Contact the authorized service technician for
repair or maintenance of this unit.
• Contact the installer for installation of this unit.
• The air conditioner is not intended for use by
young children or invalids without supervision.
• Young children should be supervised to ensure
that they do not play with the air conditioner.
• When the power cord is to be replaced,
replacement work shall be performed by
authorized personnel only using only genuine
replacement parts.
• Installation work must be performed in
accordance with the National Electric Code by
qualified and authorized personnel only.
• If the appliance is supplied from a cord extension
set or an electrical portable outlet device, the cord
extension set on electrical portable outlet device
must be positioned so that it is not subject to
splashing or ingress of moisture.
A. Safety Precautions ..............................3
B. Electrical Safety...................................6
Temporary Use of an Adapter ...............6
Temporary Use of an Extension Cord ...6
Symbols used in this Manual.................6
C. Product Introduction...........................7
Indoor Units ...........................................7
Operation Indication Lamps ..................7
Outdoor Unit ..........................................7
D. Operating Instructions........................8
How to insert the Batteries ....................8
Wireless Remote Controller
Maintenance..........................................8
Operating Method..................................8
Wireless Remote Controller...................9
Operation Mode...................................11
Auto Changeover Operation ...................
12
Healthy Dehumidification Operation....12
Air Circulation Operation .....................13
Auto Clean Operation..........................13
NEO PLASMA Purification Operation
....13
Energy-Saving Cooling Mode .....................
14
Display Luminosity ..............................14
Setting the Current Time .....................14
Timer Setting .......................................15
To cancel the timer setting ..................15
Sleep Mode .........................................15
Horizontal Vane Control ......................16
Vertical Louver Control........................16
Jet Cool Operation ..............................17
Forced operation .................................18
Auto Restart Function..........................18
E. Maintenance and Service..................19
Indoor Unit...........................................19
Outdoor Unit ........................................21
Operation Tips!....................................21
Self-Diagnosis Function ......................21
Troubleshooting Tips! Save time
and money!..........................................22
Call the service immediately in the
following situations ..............................22
Owner's Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by
the following indications.
■ Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
Always use a power plug and socket with a ground terminal.
• There is a risk of electric shock.
Do not use a defective or underrated circuit breaker. Use the correctly rated breaker and fuse.
• There is risk of fire or electric shock .
Do not use a multi consent. Always use this appliance on a dedicated circuit breaker.
• Otherwise it can cause electric shock or fire.
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center. Do not
disassemble or repair the product by yourself.
• There is risk of fire or electric shock.
Always ground the product as per the wiring diagram. Do not connect the ground wire to gas or water pipes lightening
rod or telephone ground wire.
• There is risk of fire or electric shock.
Install the panel and the cover of control box securely.
• There is risk of fire or electric shock due to dust , water etc.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not modify or extend the power cable. If the power cable or cord has scrathes or skin peeled off or deteriorated then
it must be replaced.
• There is risk of fire or electric shock.
For installation, removal or reinstall , always contact the dealer or an Authorized Service Center.
• There is risk of fire, electric shock, explosion, or injury.
Do not install the product on a defective installation stand. Be sure that the installation area does not deteriorate with age.
• It may cause product to fall.
Never install the outdoor unit on a moving base or a place from where it can fall down.
• The falling outdoor unit can cause damage or injury or even death of a person.
When the product is soaked (flooded or submerged) in water , contact an Authorized Service Center for repair before
using it again.
• There is risk of fire or eletric shock.
In outdoor unit the step-up capacitor supplies high voltage electricity to the electrical components. Be sure to
discharge the capacitor completely before conducting the repair work.
• An charged capacitor can cause electrical shock.
When installing the unit, use the installation kit provided with the product.
• Otherwise the unit may fall and cause severe injury.
Be sure to use only those parts which are listed in the svc parts list. Never attempt to modify the equipment.
• The use of inappropriate parts can cause an electrical shock, excessive heat generation or fire.
4 Air Conditioner
Safety Precautions
Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no
force pulling the cable from the connection terminals.
• Improper or loose connections can cause heat generation or fire.
Safely dispose off the packing materials. Like screws, nails, batteries, broken things etc after installation or svc and
then tear away and throw away the plastic packaging bags.
• Children may play with them and cause injury.
Make sure to check that the power cable plug is not dirty, loose or broken and then only insert the plug completely.
• Dirty, loose or broken power plug can cause electric shock or fire.
Be sure to check the refrigerant to be used. Please read the label on the product.
• Incorrect refrigerant used can prevent the normal operation of the unit.
Don't use a power cord, a plug or a loose socket which is damaged.
• Otherwise it may cause a fire or electrical shock.
Do not touch , operate, or repair the product with wet hands. Hold the plug by hand when taking out
• There is risk of electric shock or fire.
Do not place a heater or other heating appliances near the power cable.
• There is risk of fire and electric shock.
Do not allow water to run into electric parts. Install the unit away from water sources.
• There is risk of fire, failure of the product, or electric shock.
Do not store or use or even allow flammable gas or combustibles near the product.
• There is risk of fire.
Do not use the product in a tightly closed space for a long time. Perform ventilation regularly.
• Oxygen deficiency could occur and hence harm your health.
Do not open the front grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)
• There is risk of physical injury, electric shock, or product failure.
If strange sound, smell or smoke comes from product.Immediately turn the breaker off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Ventilate the product room from time to time when operating it together with a stove, or heating element etc.
• Oxygen deficiency can occur and hence harm your health.
Turn the main power off and unplug the unit when cleaning or repairing the product.
• There is risk of electric shock.
When the product is not to be used for a long time, disconnect the power supply plug or turn off the breaker.
• There is risk of product damage or failure, or unintended operation.
Take care to ensure that nobody especially kids could step on or fall onto the outdoor unit.
• This could result in personal injury and product damage.
Take care to ensure that power cable could not be pulled out or damaged during operation.
• There is risk of fire or electric shock.
Do not place ANYTHING on the power cable.
• There is risk of fire or electric shock.
Do not plug or unplug the power supply plug to turn the unit ON/OFF .
• There is risk of fire or electric shock.
When flammable gas leaks, turn off the gas and open a window for ventilation befor turning on the product.
• Do not use the telephone or turn switches on or off. There is risk of explosion or fire.
Two or more people must lift and transport the product.
• Avoid personal injury.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
• It may cause corrosion on the product.
Install the drain hose to ensure that the condensed water is drained away properly.
• A bad connection may cause water leakage.
Keep level even when installing the product.
• To avoid vibration or noise.
Do not install the product where the noise or hot air from the outdoor unit could damage or disturb the neighborhoods.
• It may cause a problem for your neighbors and hence dispute.
Owner's Manual 5
Safety Precautions
OPERATING TEMPERATURE(°C) - Inverter Model
COOLING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
32°C18°C48°C -10°C
HEATING MODE
INDOOR OUTDOOR
MAX. MIN. MAX. MIN.
30°C16°C24°C -15°C
Always check for gas (refrigerant) leakage after installation or repair of product.
• Low refrigerant levels may cause failure of product.
Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air
conditioner, not a precision refrigeration system.
• There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
• It may cause product failure.
Use a soft cloth to clean. Do not use harsh detergents, solvents or splashing water etc .
• There is risk of fire, electric shock, or damage to the plastic parts of the product.
Do not touch the metal parts of the product when removing the air filter.
• There is risk of personal injury.
Do not step on or put anyting on the product. (outdoor units)
• There is risk of personal injury and failure of product.
Always insert the filter securely after cleaning. Clean the filter every two weeks or more often if necessary.
• A dirty filter reduces the efficiency.
Do not insert hands or other objects through the air inlet or outlet while the product is operating.
• There are sharp and moving parts that could cause personal injury.
Be cautious when unpacking and installing the product.
• Sharp edges could cause injury.
If the refrigerant gas leaks during the repair, do not touch the leakaing refrigerant gas.
• The refrigernat gas can cause frostbite (cold burn)
Do not tilt the unit when removing or uninstalling it.
• The condensed water inside can spill .
Do not mix air or gas other than the specified refrigerant used in the system .
• If air enters the refrigerant system, an excessively high pressure results, causing equipment damage or injury.
If the refrigerant gas leaks during the installation, ventilate the area immediately.
• Otherwise it can be harmfull for your health.
Dismantling the unit, treatment of the refrigerant oil and eventual parts should be done in accordance with local and
national standards. Replace the all batteries in the remote control with new ones of the same type. Do not mix old and
new batteries or different types of batteries.
• There is risk of fire or product failure.
Do not recharge or disassemble the batteries. Do not dispose off batteries in a fire.
• They may burn or explode.
If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the
batteries have leaked.
• The chemicals in batteries could cause burns or other health hazards.
If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if the batteries have leaked.
• The chemicals in batteries could cause burns or other health hazards.
Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.
• Moisture may condense and wet or damage furniture.
Do not expose your skin or kids or plants to the cool or hot air draft.
• This could harm to your health.
Do not drink the water drained from the product.
• It is not sanitary and could cause serious health issues.
Use a firm stool or ladder when cleaning, maintaining or repairing the product at an height.
• Be careful and avoid personal injury.
6 Air Conditioner
Electrical Safety
Electrical Safety
• This appliance must be properly grounded.
To minimize the risk of electric shock, you must always plug into a grounded oulet.
• Do not cut or remove the grounding prong from the power plug.
• Attaching the adapter ground terminal to the wall receptacle cover screw does not ground the appliance
unless the cover screw is metal and not insulated, and the wall receptacle is grounded through the
house wiring.
• If you have any doubt whether the air conditioner is properly grounded, have the wall receptacle and
circuit checked by a qualified electrician.
We strongly discourage the use of an adapter due to potential safety hazards. For temporary connections,
use only a genuine adapter, available from most local hardware stores. Ensure that the large slot in the
adapter is aligned with the large slot in the receptacle for a proper polarity connection.
To disconnect the power cord from the adapter, use one hand on each to avoid damaging the ground
terminal. Avoid frequently unplugging the power cord as this can lead to eventual ground terminal damage.
• Never use the appliance with a broken adapter.
We strongly discourage the use of an extension cord due to potential safety hazards.
Temporary Use of an Adapter
Temporary Use of an Extension Cord
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
This symbol indicates special notes.
NOTE
Symbols used in this Manual
This appliance should be installed in accordance with national wiring regulations. This manual acts as a
guide to explaining product features.
Owner's Manual 7
Product Introduction
Product Introduction
Here is a brief introduction of the indoor and outdoor units.
• Cooling : 'Cooling' lamp lights up during Cooling Operation
• Heating : 'Heating' lamp lights up during Heating Operation
• Plasma : 'Plasma' lamp lights up during Plasma Purification Operation
✻ During Air Circulation Operation, 'Cooling' lamp lights up.
✻ While Plasma Purification operates with Air Circulation Operation, ‘Cooling’ lamp and ‘Plasma’ lamp
lights up at the same time.
Air Inlet
Piping
Drain Hose
Base Plate
Connecting
Wires
Air Outlet
Indoor Units
Outdoor Unit
Operation Indication Lamps
Front Panel
Horizontal Sub Vane
Triple Filter
Horizontal Main Vane
Plasma Filter
Air Outlet
Allergy Filter
Vertical Louver
ON/OFF Button
Signal Receiver
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