LG LRNU18GS3W0 (01) PDF Document

You should contact the authorized service technician for repair or maintenance of the LG LRNU18GS3W0.

You should contact the installer for the installation of the LG LRNU18GS3W0.

The LG LRNU18GS3W0 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 LG LRNU18GS3W0 air conditioner.

When the power cord of the LG LRNU18GS3W0 is to be replaced, replacement work shall be performed by authorized personnel only using only genuine replacement parts.

Installation work for the LG LRNU18GS3W0 must be performed in accordance with the National Electric Code by qualified and authorized personnel only.

You should not use a defective or underrated circuit breaker. This appliance must be used on a dedicated circuit. There is a risk of fire or electric shock if not followed.

For electrical work on the LG LRNU18GS3W0, contact the dealer, seller, a qualified electrician, or an Authorized Service Center. Do not disassemble or repair the product yourself, as there is a risk of fire or electric shock.

You must always ground the LG LRNU18GS3W0 to prevent the risk of fire or electric shock.

You must install the panel and the cover of the control box securely. There is a risk of fire or electric shock if not done properly.

You must always install a dedicated circuit and breaker for the LG LRNU18GS3W0. Improper wiring or installation may cause fire or electric shock.

You should use the correctly rated breaker or fuse for the LG LRNU18GS3W0. Incorrect ratings pose a risk of fire or electric shock.

You should not modify or extend the power cable of the LG LRNU18GS3W0. This poses a risk of fire or electric shock.

You should not install, remove, or re-install the LG LRNU18GS3W0 unit by yourself (the customer). This carries a risk of fire, electric shock, explosion, or injury.

Be cautious when unpacking and installing the LG LRNU18GS3W0. Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.

You should not install the LG LRNU18GS3W0 on a defective installation stand. Doing so may cause injury, accident, or damage to the product.

You should be sure the installation area for the LG LRNU18GS3W0 does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.

You should not let the LG LRNU18GS3W0 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 of the LG LRNU18GS3W0 cannot be pulled out or damaged during operation. There is a risk of fire or electric shock if the cable is compromised.

You should not place anything on the power cable of the LG LRNU18GS3W0. This poses a risk of fire or electric shock.

You should not plug or unplug the power supply plug of the LG LRNU18GS3W0 during operation. This carries a risk of fire or electric shock.

You should not touch or operate the LG LRNU18GS3W0 product with wet hands. This poses a risk of fire or electrical shock.

You should not place a heater or other appliances near the power cable of the LG LRNU18GS3W0. This poses a risk of fire and electric shock.

You should not allow water to run into the electric parts of the LG LRNU18GS3W0. This may cause fire, product failure, or electric shock.

You should not store or use flammable gas or combustibles near the LG LRNU18GS3W0 product. This poses a risk of fire or product failure.

You should not use the LG LRNU18GS3W0 product in a tightly closed space for a long time, as oxygen deficiency could occur.

When flammable gas leaks, turn off the gas and open a window for ventilation before turning the LG LRNU18GS3W0 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 a smell or smoke comes from the LG LRNU18GS3W0 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 LRNU18GS3W0 product from the window before the hurricane arrives. Not doing so carries a risk of property damage, product failure, or electric shock.

You should not open the inlet grill of the LG LRNU18GS3W0 product during operation. Do not touch the electrostatic filter (if the unit is so equipped). This poses a risk of physical injury, electric shock, or product failure.

When the LG LRNU18GS3W0 product is soaked (flooded or submerged), contact an Authorized Service Center. There is a risk of fire or electric shock if used in this condition.

Be cautious that water cannot enter the LG LRNU18GS3W0 product. Water ingress carries a risk of fire, electric shock, or product damage.

Ventilate the room from time to time when operating the LG LRNU18GS3W0 together with a stove or other heat source. Failure to do so carries a risk of fire or electric shock.

Turn the main power off when cleaning or maintaining the LG LRNU18GS3W0 product. There is a risk of electric shock if power is not disconnected.

When the LG LRNU18GS3W0 is not going to be 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 the LG LRNU18GS3W0. This could result in personal injury and product damage.

Always check for gas (refrigerant) leakage after installation or repair of the LG LRNU18GS3W0 product. Low refrigerant levels may cause product failure.

Install the drain hose of the LG LRNU18GS3W0 to ensure that water is drained away properly. A bad connection may cause water leakage.

Keep the LG LRNU18GS3W0 level even when installing the product to avoid vibration or water leakage.

Do not install the LG LRNU18GS3W0 product where the noise or hot air from the outdoor unit could disturb the neighborhoods. It may cause a problem for your neighbors.

Use two or more people to lift and transport the LG LRNU18GS3W0 product to avoid personal injury.

Do not install the LG LRNU18GS3W0 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, leading to product malfunction or inefficient operation.

You should not expose your skin directly to cool air from the LG LRNU18GS3W0 for long periods of time (do not sit in the draft), as this could harm your health.

You should not use the LG LRNU18GS3W0 product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system, and such usage carries a risk of damage or loss of property.

Blocking the inlet or outlet of air flow for the LG LRNU18GS3W0 may cause product failure.

Use a soft cloth to clean the LG LRNU18GS3W0. Do not use harsh detergents, solvents, etc., as there is a risk of fire, electric shock, or damage to the plastic parts of the product.

Do not touch the metal parts of the LG LRNU18GS3W0 product when removing the air filter, as they are very sharp and pose a risk of personal injury.

You should not step on or put anything on the outdoor units of the LG LRNU18GS3W0, as this poses a risk of personal injury and product failure.

Always insert the filter securely. Clean the air filter of the LG LRNU18GS3W0 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.

You should not insert hands or other objects through the air inlet or outlet of the LG LRNU18GS3W0 while the product is operated. There are sharp and moving parts that could cause personal injury.

You should not drink the water drained from the LG LRNU18GS3W0 product, as it is not sanitary and could cause serious health issues.

Use a firm stool or ladder when cleaning or maintaining the LG LRNU18GS3W0 product. Be careful and avoid personal injury.

Replace all batteries in the remote control for the LG LRNU18GS3W0 with new ones of the same type. Do not mix old and new batteries or different types of batteries, as there is a risk of fire or explosion.

Do not recharge or disassemble the batteries for the LG LRNU18GS3W0 remote control. Do not dispose of batteries in a fire, as they may burn or explode.

If the liquid from the LG LRNU18GS3W0 remote control batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the batteries have leaked, as the chemicals in batteries could cause burns or other health hazards.

Before operating the LG LRNU18GS3W0, follow these steps:

1. Contact an installation specialist for installation.

2. Use a dedicated circuit.

When using the LG LRNU18GS3W0, please adhere to these guidelines:

1. Being exposed to direct airflow 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.

2. Due to the possibility of oxygen deficiency, ventilate the room when the LG LRNU18GS3W0 is used together with stoves or other heating devices.

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

For cleaning and maintenance of the LG LRNU18GS3W0, please follow these instructions:

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

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

3. When cleaning the 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.

For repair and maintenance of the LG LRNU18GS3W0, contact your authorized service dealer.

The On/Off lamp on the LG LRNU18GS3W0 lights up during system operation, when an error code is displayed, and during auto restart setting.

The Sleep mode lamp on the LG LRNU18GS3W0 lights up during sleep mode auto operation.

The Timer lamp on the LG LRNU18GS3W0 lights up during timer operation or sleep mode auto operation.

The Defrost mode lamp on the LG LRNU18GS3W0 lights up during defrost mode or hot start operation (for Heat pump models only).

The Plasma lamp on the LG LRNU18GS3W0 indicates its dynamic mode by using a multiple lighting system.

The Power Display on the LG LRNU18GS3W0 indicates the setting temperature and operation mode (Cooling, heating, auto operation, dehumidification mode).

Hot start operation on the LG LRNU18GS3W0 stops the indoor fan in heating operation for minutes to prevent cold air from blowing out from the unit.

In defrost mode, the LG LRNU18GS3W0 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 wired remote controller for the LG LRNU18GS3W0 displays current operation status.

The 2ndF button on the wired remote controller for the LG LRNU18GS3W0 is used for secondary functions of other buttons.

The Timer set/cancel button on the wired remote controller for the LG LRNU18GS3W0 is used to set or cancel the Program/Week/Holiday, Hour/Min/SET/CIr/Ventilator functions.

The Set temperature button on the wired remote controller for the LG LRNU18GS3W0 is used to adjust the desired temperature setting.

The ON/OFF button on the wired remote controller for the LG LRNU18GS3W0 is used to turn the unit on or off.

The Fan operation button on the wired remote controller for the LG LRNU18GS3W0 controls the fan operation mode.

The Operation mode selection button on the wired remote controller for the LG LRNU18GS3W0 selects between different operation modes.

The Fan speed button on the wired remote controller for the LG LRNU18GS3W0 adjusts the fan speed.

The Horizontal/Vertical air flow direction button on the wired remote controller for the LG LRNU18GS3W0 controls the direction of the airflow.

The Room temperature indicator on the wired remote controller for the LG LRNU18GS3W0 displays the current room temperature.

The Plasma button on the wired remote controller for the LG LRNU18GS3W0 activates or deactivates the Plasma function.

The Time reset button on the wired remote controller for the LG LRNU18GS3W0 is used to reset the time settings.

The Operation lamp on the wired remote controller for the LG LRNU18GS3W0 indicates the unit’s operational status.

The Start/Stop Button on the wireless remote controller for the LG LRNU18GS3W0 initiates or halts operation when pressed.

The Operation Mode Selection Button on the wireless remote controller for the LG LRNU18GS3W0 is used to choose the desired operation mode.

The Room Temperature Setting Buttons on the wireless remote controller for the LG LRNU18GS3W0 are used to set the room temperature.

The Indoor Fan Speed Selector on the wireless remote controller for the LG LRNU18GS3W0 is used to select fan speed in four steps: low, medium, high, and Chaos.

The Jet Cool button on the wireless remote controller for the LG LRNU18GS3W0 enables speed cooling/heating operation at a super high fan speed.

The Chaos Swing Button on the wireless remote controller for the LG LRNU18GS3W0 is used to stop or start louver movement and set the desired up/down airflow direction.

The On/Off Timer Buttons on the wireless remote controller for the LG LRNU18GS3W0 are used to set the time for starting and stopping operation.

The Time Setting Button on the wireless remote controller for the LG LRNU18GS3W0 is used to adjust the time.

The Timer Set/Cancel Button on the wireless remote controller for the LG LRNU18GS3W0 is used to set the timer once the desired time is obtained and to cancel the Timer operation.

The Sleep Mode Auto Button on the wireless remote controller for the LG LRNU18GS3W0 is used to set Sleep Mode Auto operation.

The Air Circulation Button on the wireless remote controller for the LG LRNU18GS3W0 is used to circulate the room air without cooling or heating.

The Room Temperature Button on the wireless remote controller for the LG LRNU18GS3W0 is used to set the desired horizontal airflow direction.

The Plasma button (optional) on the wireless remote controller for the LG LRNU18GS3W0 is used to start or stop the plasma-purification function.

The Horizontal Airflow Direction Control Button (optional) on the wireless remote controller for the LG LRNU18GS3W0 is used to set the desired horizontal airflow direction.

The Reset Button on the wireless remote controller for the LG LRNU18GS3W0 is used to initialize the remote controller.

The 2nd F Button on the wireless remote controller for the LG LRNU18GS3W0 is used prior to using modes printed in blue at the bottom of buttons.

The Auto Clean button (optional) on the wireless remote controller for the LG LRNU18GS3W0 is used to set Auto Clean mode.

When handling the remote controller for the LG LRNU18GS3W0, please observe the following:

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

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

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

Do not drop or throw the remote controller.

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

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

Before performing any maintenance on the LG LRNU18GS3W0, turn off the main power to the system. Never use any of the following:

Water hotter than 40°C, which could cause deformation and/or discoloration.

Volatile substances, which could damage the surfaces of the air conditioner.

The air filters behind the front panel/grill of the LG LRNU18GS3W0 should be checked and cleaned once every 2 weeks or more often if necessary.

To clean the air filters of the LG LRNU18GS3W0, remove them (see diagrams for your model type). Clean the filters with a vacuum cleaner or warm soapy water. If dirt is not easily removed, wash with a solution of detergent in lukewarm water. Dry well in shade after washing and reinstall the filters back in place.

The plasma filters behind the air filter of the LG LRNU18GS3W0 should be checked and cleaned once every 3 months or more often if necessary.

To clean the plasma filters of the LG LRNU18GS3W0, remove them (see diagrams for your model type). Clean the filters with a vacuum cleaner. If it is dirty, wash it with water and dry well in shade, then install back in place.

Remove the deodorizer filters behind the air filter of the LG LRNU18GS3W0 and expose them to direct sunlight for 2 hours. Then insert these filters into their original position.

To remove filters from a Type 1 LG LRNU18GS3W0 indoor unit:

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

2. Remove the air filters.

3. Then pull out the plasma filter.

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

To remove filters from a Type 2 LG LRNU18GS3W0 indoor unit:

1. Open the front panel as shown in the PDF diagrams.

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 the LG LRNU18GS3W0 within 10 seconds after opening the inlet grille, as it may cause an electric shock.

If the LG LRNU18GS3W0 is not going to be used for a long time, follow these steps:

1. Operate the 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.

Turning off the breaker for the LG LRNU18GS3W0 when it is not going to be used for a long time is important because dirt may collect and may cause a fire.

If the air filters of the LG LRNU18GS3W0 become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air conditioner will be wasted.

When the LG LRNU18GS3W0 air conditioner is to be used again, follow these steps:

1. Clean the air filter and install it in the indoor unit.

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.

Overcooling the room with the LG LRNU18GS3W0 is not good for health and wastes electricity.

Keep blinds or curtains closed. Do not let direct sunshine enter the room when the LG LRNU18GS3W0 air conditioner is in operation.

To keep the room temperature uniform with the LG LRNU18GS3W0, adjust the vertical and horizontal airflow direction 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 using the LG LRNU18GS3W0.

Blockages in the air filter of the LG LRNU18GS3W0 reduce the airflow and lower cooling and dehumidifying effects. Clean at least once every two weeks.

Since windows are kept closed when operating the LG LRNU18GS3W0, it is a good idea to open them and ventilate the room now and then.

If the LG LRNU18GS3W0 air conditioner does not operate, check the following:

Have you made a mistake in timer operation?

Has the fuse blown or has the circuit breaker been tripped?

If the room has a peculiar odor when using the LG LRNU18GS3W0, check that this is not a damp smell exuded by the walls, carpet, furniture, or cloth items in the room.

Condensation occurs when the airflow from the LG LRNU18GS3W0 air conditioner cools the warm room air.

This is the protector of the mechanism. Wait about three minutes, and operation will begin for the LG LRNU18GS3W0 air conditioner.

If the LG LRNU18GS3W0 does not cool or heat effectively, check the following:

Is the air filter dirty? See air filter cleaning instructions.

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

Has the temperature been set incorrectly?

Are the indoor unit’s air inlet or outlet vents obstructed?

Noisy operation of the LG LRNU18GS3W0 air conditioner can be caused by:

A noise that sounds like water flowing: This is the sound of freon flowing inside the air conditioner unit.

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

A crack sound from the LG LRNU18GS3W0 is generated by the expansion/constriction of the front panel, etc., due to changes in temperature.

If the remote control display for the LG LRNU18GS3W0 is faint or has no display at all, check the following:

Are the batteries depleted?

Are the batteries inserted in the opposite (+) and (-) directions?

If the Filter sign lamp (LED) is ON for the LG LRNU18GS3W0, it indicates that the filter needs cleaning. After cleaning the filter, press the Timer button and the button of the wired remote controller at the same time for 3 seconds.

The outdoor side of the LG LRNU18GS3W0 appliance is WATER RESISTANT. However, the indoor side is not water resistant and should not be exposed to excess water.