LG LRNU18GS3R0 (01) PDF Document

To ensure safe installation and prevent injury or property damage for your LG LRNU18GS3R0, please follow these instructions:

• Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit to avoid risk of fire or electric shock.
• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center to avoid risk of fire or electric shock.
• Always ground the product to prevent risk of fire or electric shock.
• Install the panel and the cover of the control box securely to avoid risk of fire or electric shock.
• Always install a dedicated circuit and breaker. Improper wiring or installation may cause fire or electric shock.
• Use the correctly rated breaker or fuse to prevent risk of fire or electric shock.
• Do not modify or extend the power cable to avoid risk of fire or electric shock.
• Do not install, remove, or re-install the unit by yourself (customer) to avoid risk of fire, electric shock, explosion, or injury.
• Be cautious when unpacking and installing the product. Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.
• For installation, always contact the dealer or an Authorized Service Center to avoid risk of fire, electric shock, explosion, or injury.
• Do not install the product on a defective installation stand, as it may cause injury, accident, or damage to the product.
• Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
• Install the drain hose to ensure that water is drained away properly. A bad connection may cause water leakage.
• Keep the LG LRNU18GS3R0 unit level even when installing the product to avoid vibration or water leakage.
• Use two or more people to lift and transport the product to avoid personal injury.
• Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods, as it may cause a problem for your neighbors.
• Do not install the product where it will be exposed to sea wind (salt spray) directly. It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient operation.

To ensure safe operation of your LG LRNU18GS3R0, please follow these instructions:

• 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.
• Take care to ensure that the power cable could not be pulled out or damaged during operation to avoid risk of fire or electric shock.
• Do not place anything on the power cable to avoid risk of fire or electric shock.
• Do not plug or unplug the power supply plug during operation to avoid risk of fire or electric shock.
• Do not touch (operate) the product with wet hands to avoid risk of fire or electrical shock.
• Do not place a heater or other appliances near the power cable to avoid risk of fire and electric shock.
• Do not allow water to run into electric parts. It may cause risk of fire, failure of the product, or electric shock.
• Do not store or use flammable gas or combustibles near the product to avoid risk of fire or failure of product.
• Do not use the 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 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 the product, turn the breaker off or disconnect the power supply cable to avoid risk of electric shock or fire.
• Stop operation and close the window in a storm or hurricane. If possible, remove the product from the window before the hurricane arrives to avoid risk of property damage, product failure, or electric shock.
• Do not open the inlet grille of the 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.
• When the product is soaked (flooded or submerged), contact an Authorized Service Center to avoid risk of fire or electric shock.
• Be cautious that water could not enter the product to avoid risk of fire, electric shock, or product damage.
• Ventilate the product from time to time when operating it together with a stove, etc., to avoid risk of fire or electric shock.
• Do not block the inlet or outlet of air flow, as it may cause product failure.
• Do not step on or put anything on the outdoor units to avoid risk of personal injury and failure of product.
• Do not insert hands or other objects through the air inlet or outlet while the product is operated. There are sharp and moving parts that could cause personal injury.
• Do not drink the water drained from the product, as it is not sanitary and could cause serious health issues.
• Do not expose your skin directly to cool air for long periods of time (Don’t sit in the draft), as this could harm your health.
• 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.

To ensure safe maintenance of your LG LRNU18GS3R0, please follow these instructions:

• Turn the main power off when cleaning or maintaining the product to avoid risk of electric shock.
• Use a soft cloth to clean. 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 product when removing the air filter. They are very sharp! There is a risk of personal injury.
• 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.
• Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.

Before operating your new LG LRNU18GS3R0 heat pump indoor unit, you should:

1. Contact an installation specialist for installation.

2. Use a dedicated circuit.

When using your LG LRNU18GS3R0 heat pump indoor unit, consider the following:

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 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.

During cleaning and maintenance of your LG LRNU18GS3R0, remember these precautions:

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.

The On/Off lamp lights up during the system operation, error code, and auto restart setting of your LG LRNU18GS3R0.

The Sleep mode lamp lights up during sleep mode auto operation on your LG LRNU18GS3R0.

The Timer lamp lights up during timer operation or sleep mode auto operation on your LG LRNU18GS3R0.

The Defrost mode lamp lights up during defrost mode or hot start operation (for Heat pump models only) on your LG LRNU18GS3R0.

The Plasma lamp indicates that the function illustrates its dynamic mode by using a multiple lighting system on your LG LRNU18GS3R0.

The Power Display indicates the setting temperature and operation mode (Cooling, heating, auto operation, dehumidification mode) on your LG LRNU18GS3R0.

Hot start operation on your LG LRNU18GS3R0 stops the indoor fan in heating operation for minutes to prevent cold air from blowing out from the unit.

In defrost mode, your LG LRNU18GS3R0 unit stops heating operation for a few minutes to remove the formation of ice on the heat exchanger coils to maintain efficiency.

The wired remote controller for your LG LRNU18GS3R0 has the following functions:

1. Operation indication screen

2. Swirl button (Not Available)

3. 2ndF button

4. Timer set/cancel Program/Week/Holiday Hour/Min/SET/CIr/Ventilator

5. Set temperature button

6. ON/OFF button

7. Fan operation

8. Operation mode selection button

9. Fan speed button

10. Horizontal/Vertical air flow direction button (option)

11. Room temperature

12. Plasma button

13. Time reset button

14. Operation lamp

Press the Start/Stop Button on the wireless remote controller for your LG LRNU18GS3R0 to begin operation.

Use the Operation Mode Selection Button on the wireless remote controller for your LG LRNU18GS3R0 to select the desired operation mode.

Use the Room Temperature Setting Buttons on the wireless remote controller for your LG LRNU18GS3R0 to set the desired room temperature.

Use the Indoor Fan Speed Selector on the wireless remote controller for your LG LRNU18GS3R0 to select fan speed in four steps: low, medium, high, and Chaos.

Press the Jet Cool button on the wireless remote controller for your LG LRNU18GS3R0 to operate speed cooling/heating at a super high fan speed.

Use the Chaos Swing Button on the wireless remote controller for your LG LRNU18GS3R0 to stop or start louver movement and set the desired up/down airflow direction.

Use the On/Off Timer Buttons on the wireless remote controller for your LG LRNU18GS3R0 to set the time of starting and stopping operation.

Use the Time Setting Button on the wireless remote controller for your LG LRNU18GS3R0 to adjust the time.

Use the Timer Set/Cancel Button on the wireless remote controller for your LG LRNU18GS3R0 to set the timer when the desired time is obtained and to cancel the Timer operation.

Use the Sleep Mode Auto Button on the wireless remote controller for your LG LRNU18GS3R0 to set Sleep Mode Auto operation.

Use the Air Circulation Button on the wireless remote controller for your LG LRNU18GS3R0 to circulate the room air without cooling or heating.

Use the Room Temperature Button (or the Horizontal Airflow Direction Control Button, if option is available) on the wireless remote controller for your LG LRNU18GS3R0 to set the desired horizontal airflow direction.

Use the Plasma(optional) button on the wireless remote controller for your LG LRNU18GS3R0 to start or stop the plasma-purification function.

Use the Reset Button on the wireless remote controller for your LG LRNU18GS3R0 to initialize the remote controller.

Use the 2nd F Button on the wireless remote controller for your LG LRNU18GS3R0 prior to using modes printed in blue at the bottom of buttons.

Use the Auto Clean(optional) button on the wireless remote controller for your LG LRNU18GS3R0 to set Auto Clean mode.

When handling the remote controller for your LG LRNU18GS3R0, consider the following:

• Aim at the signal receptor on the wired remote controller so as 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 a strong light over the signal receptor with a curtain or etc. so as to prevent abnormal operation. (Examples: electronic quick start, ELBA, inverter type fluorescent lamp).

The air filters behind the front panel/grill of your LG LRNU18GS3R0 should be checked and cleaned once every 2 weeks or more often if necessary.

To clean them:

1. Remove the filters as shown in the 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 the shade after washing and reinstall the filters back in place.

The plasma filters behind the air filter of your LG LRNU18GS3R0 should be checked and cleaned once every 3 months or more often if necessary.

To clean them:

1. Remove the filters as shown in the 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 the shade.

4. Install the filters back in place.

Caution: Do not touch this plasma filter within 10 seconds after opening the inlet grille, it may cause an electric shock.

To clean the deodorizer filters in your LG LRNU18GS3R0:

1. Remove the deodorizer filters behind the air filter.

2. Expose them to direct sunlight for 2 hours.

3. Insert these filters into their original position.

For LG LRNU18GS3R0 (Artcool Mirror Type 1):

1. Open the upside of the panel and lift it up as shown in the diagram. 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 LRNU18GS3R0 (Artcool Mirror Type 2):

1. Open the front panel as shown in the diagram.

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.

If your LG LRNU18GS3R0 unit will not 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.

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

When preparing to use your LG LRNU18GS3R0 unit again:

1. Clean the air filter and install it in the indoor unit. (Refer to the cleaning instructions on filter maintenance).

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.

To optimize the operation of your LG LRNU18GS3R0:

• Do not overcool the room. This is not good for health and wastes electricity.
• Keep blinds or curtains closed. Do not let direct sunshine enter the room when the air conditioner is in operation.
• Keep the room temperature uniform. 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.
• Clean the air filter regularly. Blockages in the air filter reduce the airflow and lower cooling and dehumidifying effects. Clean at least once every two weeks.
• Ventilate the room occasionally. Since windows are kept closed, it is a good idea to open them and ventilate the room now and then.

If your LG LRNU18GS3R0 does not operate, consider 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 operating your LG LRNU18GS3R0, check that this is not a damp smell exuded by the walls, carpet, furniture or cloth items in the room.

If condensation is leaking from your LG LRNU18GS3R0, know that condensation occurs when the airflow from the air conditioner cools the warm room air.

Your LG LRNU18GS3R0 does not operate for about 3 minutes when restarting because this is a protector of the mechanism. Wait about three minutes and operation will begin.

If your LG LRNU18GS3R0 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?

If your LG LRNU18GS3R0 unit is noisy, consider the following:

• For a noise that sounds like water flowing: This is the sound of freon flowing inside the air conditioner unit.
• For a noise that sounds like the 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 your LG LRNU18GS3R0 is generated by the expansion/constriction of the front panel, etc. due to changes of temperature.

If the remote control display for your LG LRNU18GS3R0 is faint or not visible, check the following:

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

If the Filter sign lamp (LED) is ON on your LG LRNU18GS3R0, after cleaning the filter, press the Timer button and the button of the wired remote controller at the same time for 3 seconds.