LG LRNU18GS3D0 (01) PDF Document

You can find the model and serial numbers for your LG LRNU18GS3D0 on a label on the side of the unit.

Contact the authorized service technician for repair or maintenance of your LG LRNU18GS3D0 unit.

Contact the installer for installation of your LG LRNU18GS3D0 unit.

The LG LRNU18GS3D0 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.

Do not use a defective or underrated circuit breaker. There is a risk of fire or electric shock. Use the LG LRNU18GS3D0 appliance on a dedicated circuit.

Always ground the LG LRNU18GS3D0 product. There is a risk of fire or electric shock if not grounded properly.

Install the panel and the cover of the control box securely. There is a risk of fire or electric shock if not secure.

Always install a dedicated circuit and breaker for the LG LRNU18GS3D0. Improper wiring or installation may cause fire or electric shock.

Use the correctly rated breaker or fuse for the LG LRNU18GS3D0. There is a risk of fire or electric shock otherwise.

Do not modify or extend the power cable of your LG LRNU18GS3D0. There is a risk of fire or electric shock.

Do not install, remove, or re-install the LG LRNU18GS3D0 unit by yourself (as a customer). There is a risk of fire, electric shock, explosion, or injury.

Be cautious when unpacking and installing the LG LRNU18GS3D0. Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.

Do not install the LG LRNU18GS3D0 product on a defective installation stand. It may cause injury, accident, or damage to the product.

Be sure the installation area for your LG LRNU18GS3D0 does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.

Do not let the LG LRNU18GS3D0 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.

Take care to ensure that the power cable for your LG LRNU18GS3D0 could not be pulled out or damaged during operation. There is a risk of fire or electric shock.

Do not place anything on the power cable of your LG LRNU18GS3D0. There is a risk of fire or electric shock.

Do not plug or unplug the power supply plug of your LG LRNU18GS3D0 during operation. There is a risk of fire or electric shock.

Do not touch or operate the LG LRNU18GS3D0 with wet hands. There is a risk of fire or electrical shock.

Do not place a heater or other appliances near the power cable of your LG LRNU18GS3D0. There is a risk of fire and electric shock.

Do not allow water to run into the electric parts of your LG LRNU18GS3D0. It may cause a risk of fire, failure of the product, or electric shock.

Do not store or use flammable gas or combustibles near the LG LRNU18GS3D0 product. There is a risk of fire or failure of the product.

Do not use the LG LRNU18GS3D0 product in a tightly closed space for a long time. Oxygen deficiency could occur.

When flammable gas leaks, turn off the gas and open a window for ventilation before turning the LG LRNU18GS3D0 product on. Do not use the telephone or turn switches on or off, as there is a risk of explosion or fire.

If strange sounds, or smoke comes from your LG LRNU18GS3D0 product, turn the breaker off or disconnect the power supply cable. There is a risk of electric shock or fire.

Stop operation and close the window in a storm or hurricane. If possible, remove the LG LRNU18GS3D0 product from the window before the hurricane arrives. There is a risk of property damage, failure of product, or electric shock.

Do not open the inlet grill of the LG LRNU18GS3D0 product during operation. Do not touch the electrostatic filter, if the unit is so equipped. There is a risk of physical injury, electric shock, or product failure.

If your LG LRNU18GS3D0 product is soaked (flooded or submerged), contact an Authorized Service Center. There is a risk of fire or electric shock.

Be cautious that water could not enter the LG LRNU18GS3D0 product. There is a risk of fire, electric shock, or product damage.

Ventilate the LG LRNU18GS3D0 product from time to time when operating it together with a stove, etc. There is a risk of fire or electric shock if not ventilated.

Turn the main power off when cleaning or maintaining your LG LRNU18GS3D0 product. There is a risk of electric shock.

When the LG LRNU18GS3D0 product is not used for a long time, disconnect the power supply plug or turn off the breaker. This prevents product damage or failure, or unintended operation.

Take care to ensure that nobody could step on or fall onto the outdoor unit of your LG LRNU18GS3D0. This could result in personal injury and product damage.

Always check for gas (refrigerant) leakage after installation or repair of your LG LRNU18GS3D0 product. Low refrigerant levels may cause failure of the product.

Install the drain hose to ensure that water is drained away properly from your LG LRNU18GS3D0. A bad connection may cause water leakage.

Keep the LG LRNU18GS3D0 level even when installing the product to avoid vibration or water leakage.

Do not install the LG LRNU18GS3D0 product where the noise or hot air from the outdoor unit could damage the neighborhoods. It may cause a problem for your neighbors.

Use two or more people to lift and transport the LG LRNU18GS3D0 product to avoid personal injury.

Do not install the LG LRNU18GS3D0 product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product, particularly on the condenser and evaporator fins, which could lead to product malfunction or inefficient operation.

Do not expose the skin directly to cool air from the LG LRNU18GS3D0 for long periods of time (don’t sit in the draft). This could harm your health.

Do not use the LG LRNU18GS3D0 product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system, and doing so could cause damage or loss of property.

Do not block the inlet or outlet of air flow for your LG LRNU18GS3D0. It may cause product failure.

Use a soft cloth to clean your LG LRNU18GS3D0. Do not use harsh detergents, solvents, etc. There is a risk of fire, electric shock, or damage to the plastic parts of the product.

Do not touch the metal parts of your LG LRNU18GS3D0 when removing the air filter, as they are very sharp! There is a risk of personal injury.

Do not step on or put anything on the outdoor unit of your LG LRNU18GS3D0. There is a risk of personal injury and failure of the product.

Always insert the filter securely. Clean the filter every two weeks or more often if necessary. A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.

Do not insert hands or other objects through the air inlet or outlet of your LG LRNU18GS3D0 while the product is operated. There are sharp and moving parts that could cause personal injury.

Do not drink the water drained from your LG LRNU18GS3D0 product. It is not sanitary and could cause serious health issues.

Use a firm stool or ladder when cleaning or maintaining your LG LRNU18GS3D0 product. Be careful and avoid personal injury.

Replace 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 a risk of fire or explosion.

Do not recharge or disassemble the batteries for your LG LRNU18GS3D0 remote control. Do not dispose of batteries in a fire. They may burn or explode.

If the liquid from the batteries of your LG LRNU18GS3D0 remote control 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.

1. Contact an installation specialist for installation.

2. Use a dedicated circuit.

Being exposed to direct airflow from the LG LRNU18GS3D0 for an extended period of time could be hazardous to your health. Do not expose occupants, pets, or plants to direct airflow for extended periods of time.

Due to the possibility of oxygen deficiency, ventilate the room when the LG LRNU18GS3D0 is used together with stoves or other heating devices.

Do not use this LG LRNU18GS3D0 air conditioner for non-specified special purposes (e.g. preserving precision devices, food, pets, plants, and art objects). Such usage could damage the items.

Do not touch the metal parts of the LG LRNU18GS3D0 unit when removing the filter. Injuries can occur when handling sharp metal edges.

Do not use water to clean inside the LG LRNU18GS3D0 air conditioner. Exposure to water can destroy the insulation, leading to possible electric shock.

When cleaning the LG LRNU18GS3D0 unit, first make sure that the power and breaker are turned off. The fan rotates at a very high speed during operation. There is a possibility of injury if the unit’s power is accidentally triggered on while cleaning inner parts of the unit.

The On/Off lamp lights up during the system operation, error code and auto restart setting on your LG LRNU18GS3D0.

The Sleep mode lamp lights up during sleep mode auto operation on your LG LRNU18GS3D0.

The Timer lamp lights up during timer operation or sleep mode auto operation on your LG LRNU18GS3D0.

The Defrost mode lamp lights up during defrost mode or hot start operation (Heat pump model only) on your LG LRNU18GS3D0.

The Plasma lamp illustrates its dynamic mode by using a multiple lighting system on your LG LRNU18GS3D0.

The Power Display on your LG LRNU18GS3D0 indicates the setting temperature and operation mode (Cooling, heating, auto operation, dehumidification mode).

Hot start operation on your LG LRNU18GS3D0 stops the indoor fan in heating operation for minutes to prevent cold air from blowing out from the unit.

In defrost mode, the LG LRNU18GS3D0 unit stops heating operation for a few minutes to remove the formation of ice on the heat exchanger coils to maintain efficiency.

The Operation indication screen on the LG LRNU18GS3D0 remote controller displays the current operation status.

The Swirl button on the LG LRNU18GS3D0 remote controller is not available for this model.

The 2ndF button on the LG LRNU18GS3D0 remote controller is used for secondary functions.

The Timer set/cancel button on the LG LRNU18GS3D0 remote controller is used to set or cancel the Program/Week/Holiday, Hour/Min/SET/Clr/Ventilator functions.

The Set temperature button on the LG LRNU18GS3D0 remote controller is used to set the desired room temperature.

The ON/OFF button on the LG LRNU18GS3D0 remote controller is used to turn the unit on or off.

The Fan operation button on the LG LRNU18GS3D0 remote controller is used to control the fan operation.

The Operation mode selection button on the LG LRNU18GS3D0 remote controller is used to select the desired operation mode.

The Fan speed button on the LG LRNU18GS3D0 remote controller is used to adjust the fan speed.

The Horizontal/Vertical air flow direction button on the LG LRNU18GS3D0 remote controller is used to set the desired air flow direction (optional).

The Room temperature indicator on the LG LRNU18GS3D0 remote controller shows the current room temperature.

The Plasma button on the LG LRNU18GS3D0 remote controller is used to activate or deactivate the Plasma function.

The Time reset button on the LG LRNU18GS3D0 remote controller is used to reset the time.

The Operation lamp on the LG LRNU18GS3D0 remote controller indicates the operation status.

The Start/Stop Button on the LG LRNU18GS3D0 wireless remote controller is used to start or stop operation when pressed.

The Operation Mode Selection Button on the LG LRNU18GS3D0 wireless remote controller is used to select the operation mode.

The Room Temperature Setting Buttons on the LG LRNU18GS3D0 wireless remote controller are used to select the room temperature.

The Indoor Fan Speed Selector on the LG LRNU18GS3D0 wireless remote controller is used to select fan speed in four steps: low, medium, high, and Chaos.

Jet Cool on the LG LRNU18GS3D0 wireless remote controller operates super high fan speed for speed cooling/heating.

The Chaos Swing Button on the LG LRNU18GS3D0 wireless remote controller is used to stop or start louver movement and set the desired up/down airflow direction.

The On/Off Timer Buttons on the LG LRNU18GS3D0 wireless remote controller are used to set the time of starting and stopping operation.

The Time Setting Button on the LG LRNU18GS3D0 wireless remote controller is used to adjust the time.

The Timer Set/Cancel Button on the LG LRNU18GS3D0 wireless remote controller is used to set the timer when the desired time is obtained and to cancel the Timer operation.

The Sleep Mode Auto Button on the LG LRNU18GS3D0 wireless remote controller is used to set Sleep Mode Auto operation.

The Air Circulation Button on the LG LRNU18GS3D0 wireless remote controller is used to circulate the room air without cooling or heating.

The Room Temperature Button on the LG LRNU18GS3D0 wireless remote controller is used to set the desired horizontal airflow direction.

The Plasma button on the LG LRNU18GS3D0 wireless remote controller is used to start or stop the plasma-purification function (optional).

The Horizontal Airflow Direction Control Button on the LG LRNU18GS3D0 wireless remote controller is used to set the desired horizontal airflow direction (optional).

The Reset Button on the LG LRNU18GS3D0 wireless remote controller is used to initialize the remote controller.

The 2nd F Button on the LG LRNU18GS3D0 wireless remote controller is used prior to using modes printed in blue at the bottom of buttons.

The Auto Clean button on the LG LRNU18GS3D0 wireless remote controller is used to set Auto Clean mode (optional).

1. Aim at the signal receptor on the wired remote controller so as to operate.

2. The remote control signal can be received at a distance of up to about 7m.

3. Be sure that there are no obstructions between the remote controller and the signal receptor.

4. Do not drop or throw the remote controller.

5. Do not place the remote controller in a location exposed to direct sunlight, or near the heating unit, or any other heat source.

6. Block a strong light over the signal receptor with a curtain or etc. so as to prevent the abnormal operation (e.g., electronic quick start, ELBA, inverter type fluorescent lamp).

Before performing any maintenance, turn off the main power to your LG LRNU18GS3D0 system.

Never use any of the following to clean your LG LRNU18GS3D0:

1. Water hotter than 40°C, as it could cause deformation and/or discoloration.

2. Volatile substances, as they could damage the surfaces of the air conditioner.

The air filters behind the front panel/grill of your LG LRNU18GS3D0 should be checked and cleaned once every 2 weeks or more often if necessary.

To clean the air filters of your LG LRNU18GS3D0:

1. Remove the filters as shown in the self-explanatory diagrams for your model type.

2. Clean the filters with a vacuum cleaner or warm soapy water.

3. If dirt is not easily removed, wash with a solution of detergent in lukewarm water.

4. Dry well in shade after washing and reinstall the filters back in place.

The plasma filters behind the air filter of your LG LRNU18GS3D0 should be checked and cleaned once every 3 months or more often if necessary.

To clean the plasma filters of your LG LRNU18GS3D0:

1. Remove the filters as shown in the self-explanatory diagrams for your model type.

2. Clean the filters with a vacuum cleaner.

3. If it is dirty, wash it with water and dry well in shade.

4. Install them back in place.

Remove the deodorizer filters behind the air filter and expose them to direct sunlight for 2 hours. Then insert these filters into their original position.

For LG LRNU18GS3D0 Art Cool Mirror (Type 1):

1. Open the upside of the panel and lift it up as shown. The hooks of the panel will come off.

2. Remove the air filters.

3. Then pull out the plasma filter.

After cleaning and drying well, reinstall the filters in their original position.

For LG LRNU18GS3D0 Art Cool Mirror (Type 2):

1. Open the front panel as shown.

2. Then pull the filter tab slightly forward to remove the air filter.

3. After removing the air filter, remove the plasma and deodorizer filter by slightly pulling forward.

Do not touch the plasma filter of your LG LRNU18GS3D0 within 10 seconds after opening the inlet grille, as it may cause an electric shock.

1. Operate the LG LRNU18GS3D0 air conditioner at the following settings for 2 to 3 hours:

Type of operation: Fan operation mode.

This will dry out the internal mechanisms.

2. Turn off the breaker.

Turn off the breaker when the LG LRNU18GS3D0 air conditioner is not going to be used for a long time. Dirt may collect and may cause a fire.

If the air filters of your LG LRNU18GS3D0 become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air conditioner will be wasted.

1. Clean the air filter and install it in the indoor unit. Refer to page 12 for cleaning it.

2. Check that the air inlet and outlet of the indoor/outdoor unit are not blocked.

3. Check that the ground wire is connected correctly. It may be connected to the indoor unit side.

Do not overcool the room with your LG LRNU18GS3D0. This is not good for your health and wastes electricity.

Keep blinds or curtains closed when operating your LG LRNU18GS3D0. Do not let direct sunshine enter the room when the air conditioner is in operation.

Adjust the vertical and horizontal airflow direction of your LG LRNU18GS3D0 to ensure a uniform temperature in the room.

Make sure that the doors and windows are shut tight. Avoid opening doors and windows as much as possible to keep the cool air in the room when operating your LG LRNU18GS3D0.

Since windows are kept closed, it is a good idea to open them and ventilate the room now and then when using your LG LRNU18GS3D0.

Your LG LRNU18GS3D0 may not be operating because:

1. You may have made a mistake in timer operation.

2. The fuse may have blown or the circuit breaker may have tripped.

The peculiar odor in your room when using the LG LRNU18GS3D0 may be due to a damp smell exuded by the walls, carpet, furniture, or cloth items in the room.

Condensation may leak from your LG LRNU18GS3D0 because condensation occurs when the airflow from the air conditioner cools the warm room air.

Your LG LRNU18GS3D0 may not operate for about 3 minutes when restarting because this is a protector of the mechanism. Wait about three minutes, and operation will begin.

Your LG LRNU18GS3D0 may not be cooling or heating effectively due to the following reasons:

1. The air filter may be dirty. Refer to air filter cleaning instructions.

2. The room may have been very hot when the air conditioner was first turned on. Allow time for it to cool down.

3. The temperature may have been set incorrectly.

4. The indoor unit’s air inlet or outlet vents may be obstructed.

Your LG LRNU18GS3D0 may be operating noisily due to:

1. A noise that sounds like water flowing, which is the sound of freon flowing inside the air conditioner unit.

2. A noise that sounds like compressed air releasing into the atmosphere, which is the sound of the dehumidifying water being processed inside the air conditioning unit.

A crack sound from your LG LRNU18GS3D0 is generated by the expansion/constriction of the front panel, etc., due to changes in temperature.

The remote control display for your LG LRNU18GS3D0 may be faint or not displaying at all because:

1. The batteries may be depleted.

2. The batteries may be inserted in the opposite (+) and (-) directions.

If the filter sign lamp (LED) is ON for your LG LRNU18GS3D0, clean the filter, then press the Timer button and the down arrow button of the wired remote controller at the same time for 3 seconds.

The outdoor side of your LG LRNU18GS3D0 appliance is WATER RESISTANT. However, the indoor side is not water resistant and should not be exposed to excess water.