LG LRNU18GS3B0 (01) PDF Document

You must not use a defective or underrated circuit breaker. The LG LRNU18GS3B0 appliance should be used on a dedicated circuit. There is a risk of fire or electric shock if these instructions are not followed.

For electrical work on the LG LRNU18GS3B0, 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.

Always ground the LG LRNU18GS3B0 product to prevent the risk of fire or electric shock.

Install the panel and the cover of the control box securely on the LG LRNU18GS3B0 to prevent the risk of fire or electric shock.

Always install a dedicated circuit and breaker for the LG LRNU18GS3B0. Improper wiring or installation may cause fire or electric shock. Use the correctly rated breaker or fuse.

No, do not modify or extend the power cable of the LG LRNU18GS3B0. There is a risk of fire or electric shock.

No, do not install, remove, or re-install the LG LRNU18GS3B0 unit by yourself (the customer). There is a risk of fire, electric shock, explosion, or injury.

Be cautious when unpacking and installing the LG LRNU18GS3B0. Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.

For installation of the LG LRNU18GS3B0, always contact the dealer or an Authorized Service Center. There is a risk of fire, electric shock, explosion, or injury if not installed correctly.

No, do not install the LG LRNU18GS3B0 product on a defective installation stand. It may cause injury, accident, or damage to the product.

Be sure the installation area for the LG LRNU18GS3B0 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 LRNU18GS3B0 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 the LG LRNU18GS3B0 could not be pulled out or damaged during operation. Also, do not place anything on the power cable. Not following these instructions poses a risk of fire or electric shock.

No, do not plug or unplug the power supply plug of the LG LRNU18GS3B0 during operation. There is a risk of fire or electric shock.

No, do not touch (operate) the LG LRNU18GS3B0 product with wet hands. There is a risk of fire or electrical shock.

No, do not place a heater or other appliances near the power cable of the LG LRNU18GS3B0. There is a risk of fire and electric shock.

Do not allow water to run into the electric parts of the LG LRNU18GS3B0. It may cause a risk of fire, failure of the product, or electric shock. Also, be cautious that water could not enter the product, as this carries a risk of fire, electric shock, or product damage.

No, do not store or use flammable gas or combustibles near the LG LRNU18GS3B0 product. There is a risk of fire or failure of the product.

No, do not use the LG LRNU18GS3B0 product in a tightly closed space for a long time. Oxygen deficiency could occur.

If flammable gas leaks, turn off the gas and open a window for ventilation before turning the LG LRNU18GS3B0 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, smell, or smoke comes from the LG LRNU18GS3B0 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 LRNU18GS3B0 product from the window before the hurricane arrives. Not doing so carries a risk of property damage, product failure, or electric shock.

No, do not open the inlet grill of the LG LRNU18GS3B0 product during operation. Do not touch the electrostatic filter if the unit is so equipped, as there is a risk of physical injury, electric shock, or product failure.

If the LG LRNU18GS3B0 product is soaked (flooded or submerged), contact an Authorized Service Center. There is a risk of fire or electric shock.

Yes, ventilate the LG LRNU18GS3B0 product from time to time when operating it together with a stove, etc. There is a risk of fire or electric shock if the room is not ventilated.

Turn the main power off when cleaning or maintaining the LG LRNU18GS3B0 product. There is a risk of electric shock otherwise.

When the LG LRNU18GS3B0 product is not going to be used for a long time, disconnect the power supply plug or turn off the breaker. This is to prevent risk of product damage or failure, or unintended operation. Additionally, operate the air conditioner at the fan operation mode for 2 to 3 hours to dry out the internal mechanisms, then turn off the breaker. Dirt may collect and may cause a fire if the breaker is not turned off.

Take care to ensure that nobody could step on or fall onto the outdoor unit of the LG LRNU18GS3B0. This could result in personal injury and product damage.

Always check for gas (refrigerant) leakage after installation or repair of the LG LRNU18GS3B0 product. Low refrigerant levels may cause failure of the product.

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

Keep the LG LRNU18GS3B0 level even when installing the product to avoid vibration or water leakage.

Do not install the LG LRNU18GS3B0 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 LRNU18GS3B0 product to avoid personal injury.

Do not install the LG LRNU18GS3B0 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.

Being exposed to direct airflow from the LG LRNU18GS3B0 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 LRNU18GS3B0 is used together with stoves or other heating devices.

No, do not use the LG LRNU18GS3B0 air conditioner for non-specified special purposes (e.g., preserving precision devices, food, pets, plants, and art objects). Such usage could damage the items. There is a risk of damage or loss of property.

Do not touch the metal parts of the LG LRNU18GS3B0 unit when removing the filter, as injuries can occur when handling sharp metal edges. Also, do not touch the metal parts of the LG LRNU18GS3B0 product when removing the air filter, as they are very sharp.

No, do not use water to clean inside the LG LRNU18GS3B0 air conditioner. Exposure to water can destroy the insulation, leading to possible electric shock.

When cleaning the LG LRNU18GS3B0 unit, first make sure that the power and breaker are turned off. The fan rotates at a very high speed during operation, and there is a possibility of injury if the unit’s power is accidentally triggered on while cleaning inner parts of the unit.

The operation indication lamps of the LG LRNU18GS3B0 indicate the following:

• On/Off: Lights up during the system operation, error code, and auto restart setting.
• Sleep mode: Lights up during sleep mode auto operation.
• Timer: Lights up during timer operation or sleep mode auto operation.
• Defrost mode: Lights up during defrost mode or hot start operation (Heat pump model only).
• Plasma: The function illustrates its dynamic mode by using a multiple lighting system.
• Power Display: Indicates the setting temperature and operation mode (Cooling, heating, auto operation, dehumidification mode).

Hot start operation on the LG LRNU18GS3B0 stops the indoor fan in heating operation for minutes to prevent cold air from blowing out from the unit.

In defrost mode, the LG LRNU18GS3B0 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 the LG LRNU18GS3B0 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

The wireless remote controller for the LG LRNU18GS3B0 has the following functions:

1. Start/Stop Button: Operation starts when this button is pressed.

2. Operation Mode Selection Button: Used to select the operation mode.

3. Room Temperature Setting Buttons: Used to select the room temperature.

4. Indoor Fan Speed Selector: Used to select fan speed in four steps: low, medium, high, and Chaos.

5. Jet Cool: Speed cooling/heating operates at super high fan speed.

6. Chaos Swing Button: Used to stop or start louver movement and set the desired up/down airflow direction.

7. On/Off Timer Buttons: Used to set the time of starting and stopping operation.

8. Time Setting Button: Used to adjust the time.

9. Timer Set/Cancel Button: Used to set the timer when the desired time is obtained and to cancel the Timer operation.

10. Sleep Mode Auto Button: Used to set Sleep Mode Auto operation.

11. Air Circulation Button: Used to circulate the room air without cooling or heating.

13. Plasma(optional): Used to start or stop the plasma-purification function.

14. Horizontal Airflow Direction Control Button (optional): Used to set the desired horizontal airflow direction.

15. Reset Button: Initializes the remote controller.

16. 2nd F Button: Used prior to using modes printed in blue at the bottom of buttons.

17. Auto Clean(optional): Used to set Auto Clean mode.

When handling the remote controller for the LG LRNU18GS3B0:

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 a heating unit, or any other heat source.

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

Never use any of the following for cleaning the LG LRNU18GS3B0:

• Water hotter than 40°C, as it could cause deformation and/or discoloration.
• Volatile substances, as they could damage the surfaces of the air conditioner.

Use a soft cloth to clean the LG LRNU18GS3B0. Do not use harsh detergents or solvents, as there is a risk of fire, electric shock, or damage to the plastic parts of the product.

The air filters behind the front panel/grill of the LG LRNU18GS3B0 should be checked and cleaned once every 2 weeks or more often if necessary. A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.

Clean the air filters of the LG LRNU18GS3B0 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 the shade after washing and reinstall the filters back in place.

The plasma filters behind the air filter of the LG LRNU18GS3B0 should be checked and cleaned once every 3 months or more often if necessary.

Clean the plasma filters of the LG LRNU18GS3B0 with a vacuum cleaner. If it is dirty, wash it with water and dry well in the shade, then install it back in place. Do not touch this plasma filter within 10 seconds after opening the inlet grille, as it may cause an electric shock.

Remove the deodorizer filters behind the air filter of the LG LRNU18GS3B0 and expose them to direct sunlight for 2 hours. Then insert these filters into their original position.

For a Type 1 LG LRNU18GS3B0 unit, open the upside of the panel and lift it up as shown. The hooks of the panel will come off. Remove the air filters. Then pull out the plasma filter. After cleaning and drying, reinstall the filters in their original position.

For a Type 2 LG LRNU18GS3B0 unit, open the front panel as shown. Then pull the filter tab slightly forward to remove the air filter. After removing the air filter, remove the plasma and deodorizer filter by slightly pulling forward.

When the LG LRNU18GS3B0 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.

Do not overcool the room with the LG LRNU18GS3B0, as this is not good for health and wastes electricity.

Keep blinds or curtains closed. Do not let direct sunshine enter the room when the LG LRNU18GS3B0 air conditioner is in operation.

Adjust the vertical and horizontal airflow direction of the LG LRNU18GS3B0 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 the LG LRNU18GS3B0 is operating.

Blockages in the air filter of the LG LRNU18GS3B0 reduce the airflow and lower cooling and dehumidifying effects. Clean the filter at least once every two weeks.

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

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 the LG LRNU18GS3B0 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 using the LG LRNU18GS3B0, 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 LRNU18GS3B0 air conditioner cools the warm room air.

This is the protector of the mechanism. Wait about three minutes, and operation will begin.

If the LG LRNU18GS3B0 does not cool or heat effectively, check the following:

• Is the air filter dirty? Refer to 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 LRNU18GS3B0 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 dehumidifying water being processed inside the air conditioning unit.

A crack sound from the LG LRNU18GS3B0 is generated by the expansion/constriction of the front panel, etc., due to changes in temperature.

If the remote control display for the LG LRNU18GS3B0 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 on the LG LRNU18GS3B0, 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 the LG LRNU18GS3B0 appliance is WATER RESISTANT. The indoor side is not water resistant and should not be exposed to excess water.