LG LRNU12GSER0 (01) PDF Document

Contact an authorized service technician for repair or maintenance of the LG LRNU12GSER0 unit.

Contact the installer for installation of the LG LRNU12GSER0 unit.

No, the LG LRNU12GSER0 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 for the LG LRNU12GSER0.

Installation work for the LG LRNU12GSER0 must be performed in accordance with the National Electric Code by qualified and authorized personnel only.

There is a risk of fire or electric shock. The LG LRNU12GSER0 appliance should be used on a dedicated circuit.

For electrical work on the LG LRNU12GSER0, contact the dealer, seller, a qualified electrician, or an Authorized Service Center. Do not disassemble or repair the product, as there is a risk of fire or electric shock.

Yes, always ground the LG LRNU12GSER0 product to avoid the risk of fire or electric shock.

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

Always install a dedicated circuit and breaker with the correctly rated breaker or fuse for the LG LRNU12GSER0. Improper wiring or installation may cause fire or electric shock.

There is a risk of fire or electric shock if the power cable of the LG LRNU12GSER0 is modified or extended.

No, do not install, remove, or re-install the LG LRNU12GSER0 unit by yourself (customer). There is a risk of fire, electric shock, explosion, or injury.

Be cautious when unpacking and installing the LG LRNU12GSER0 product. 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 LRNU12GSER0, always contact the dealer or an Authorized Service Center. There is a risk of fire, electric shock, explosion, or injury if not installed by qualified personnel.

Installing the LG LRNU12GSER0 on a defective installation stand may cause injury, accident, or damage to the product.

If the base collapses, the LG LRNU12GSER0 air conditioner could fall with it, causing property damage, product failure, and personal injury.

Moisture may condense and wet or damage furniture if the LG LRNU12GSER0 runs for a long time when the humidity is very high and a door or a window is left open.

Take care to ensure that the power cable for the LG LRNU12GSER0 could not be pulled out or damaged during operation. Do not place anything on the power cable. There is a risk of fire or electric shock.

No, do not plug or unplug the power supply plug of the LG LRNU12GSER0 during operation. This poses a risk of fire or electric shock.

No, do not touch or operate the LG LRNU12GSER0 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 LRNU12GSER0. This poses a risk of fire and electric shock.

Allowing water to run into the electric parts of the LG LRNU12GSER0 may cause a risk of fire, failure of the product, or electric shock.

No, do not store or use flammable gas or combustibles near the LG LRNU12GSER0 product. This poses a risk of fire or product failure.

Oxygen deficiency could occur if the LG LRNU12GSER0 product is used in a tightly closed space for a long time.

If flammable gas leaks, turn off the gas and open a window for ventilation before turning the LG LRNU12GSER0 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 LRNU12GSER0 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 LRNU12GSER0 product from the window before the hurricane arrives. This helps prevent property damage, product failure, or electric shock.

No, do not open the inlet grill of the LG LRNU12GSER0 product during operation. Do not touch the electrostatic filter (if equipped), as there is a risk of physical injury, electric shock, or product failure.

If the LG LRNU12GSER0 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 LRNU12GSER0 product. There is a risk of fire, electric shock, or product damage.

Ventilate the room from time to time when operating the LG LRNU12GSER0 together with a stove, etc., as there is a risk of fire or electric shock.

Turn the main power off when cleaning or maintaining the LG LRNU12GSER0 product. There is a risk of electric shock.

When the LG LRNU12GSER0 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. This could result in personal injury and product damage.

Always check for gas (refrigerant) leakage after installation or repair of the LG LRNU12GSER0 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 from the LG LRNU12GSER0.

Keep the LG LRNU12GSER0 level even when installing the product to avoid vibration or water leakage.

Do not install the LG LRNU12GSER0 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 LRNU12GSER0 product to avoid personal injury.

No, do not install the LG LRNU12GSER0 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.

Do not expose the skin directly to cool air for long periods of time (don’t sit in the draft) from the LG LRNU12GSER0, as this could harm your health.

No, do not use the LG LRNU12GSER0 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 a risk of damage or loss of property if used for such purposes.

Blocking the inlet or outlet of air flow for the LG LRNU12GSER0 may cause product failure.

Use a soft cloth to clean the LG LRNU12GSER0. 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 LRNU12GSER0 product when removing the air filter, as they are very sharp. There is a risk of personal injury.

No, do not step on or put anything on the outdoor units of the LG LRNU12GSER0. There is a risk of personal injury and product failure.

Always insert the filter securely. Clean the filter of the LG LRNU12GSER0 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.

No, do not insert hands or other objects through the air inlet or outlet while the LG LRNU12GSER0 product is operated. There are sharp and moving parts that could cause personal injury.

No, do not drink the water drained from the LG LRNU12GSER0 product. It is not sanitary and could cause serious health issues.

Use a firm stool or ladder when cleaning or maintaining the LG LRNU12GSER0 product. Be careful and avoid personal injury.

Replace all batteries in the remote control for the LG LRNU12GSER0 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.

No, do not recharge or disassemble the batteries for the LG LRNU12GSER0 remote control. Do not dispose of batteries in a fire, as they may burn or explode.

If the liquid from the remote control batteries for the LG LRNU12GSER0 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.

The initial steps for preparing to operate the LG LRNU12GSER0 are:

1. Contact an installation specialist for installation.

2. Use a dedicated circuit.

The guidelines for using the LG LRNU12GSER0 air conditioner are:

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 LRNU12GSER0 is used together with stoves or other heating devices.

3. Do not use the LG LRNU12GSER0 air conditioner for non-specified special purposes (e.g., preserving precision devices, food, pets, plants, and art objects). Such usage could damage the items.

The procedures for cleaning and maintenance of the LG LRNU12GSER0 are:

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 operation indication lamps on the LG LRNU12GSER0 signify 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). In defrost mode, the unit stops heating operation for a few minutes to remove ice formation on the heat exchanger coils to maintain efficiency.
• 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).

The Start/Stop Button on the wireless remote controller for the LG LRNU12GSER0 is used to start operation when pressed.

Use the Operation Mode Selection Button on the wireless remote controller to select the operation mode for the LG LRNU12GSER0.

Use the Room Temperature Setting Buttons on the wireless remote controller to select the room temperature for the LG LRNU12GSER0.

Use the Indoor Fan Speed Selector on the wireless remote controller to select fan speed in four steps: low, medium, high, and Chaos for the LG LRNU12GSER0.

Press the Jet Cool button on the wireless remote controller to operate the LG LRNU12GSER0 at super high fan speed for speed cooling/heating.

Use the Chaos Swing Button on the wireless remote controller to stop or start louver movement and set the desired up/down airflow direction for the LG LRNU12GSER0.

Use the On/Off Timer Buttons on the wireless remote controller to set the time of starting and stopping operation for the LG LRNU12GSER0.

Use the Time Setting Button on the wireless remote controller to adjust the time for the LG LRNU12GSER0.

Use the Timer Set/Cancel Button on the wireless remote controller to set the timer when the desired time is obtained and to cancel the Timer operation for the LG LRNU12GSER0.

Use the Sleep Mode Auto Button on the wireless remote controller to set Sleep Mode Auto operation for the LG LRNU12GSER0.

Use the Air Circulation Button on the wireless remote controller to circulate the room air without cooling or heating with the LG LRNU12GSER0.

Use the Horizontal Airflow Direction Control Button (optional) on the wireless remote controller to set the desired horizontal airflow direction for the LG LRNU12GSER0.

Use the Plasma(optional) button on the wireless remote controller to start or stop the plasma-purification function on the LG LRNU12GSER0.

Press the Reset Button on the wireless remote controller to initialize it for the LG LRNU12GSER0.

The 2nd F Button on the wireless remote controller for the LG LRNU12GSER0 is used prior to using modes printed in blue at the bottom of buttons.

Use the Auto Clean(optional) button on the wireless remote controller to set Auto Clean mode for the LG LRNU12GSER0.

• 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 the abnormal operation (e.g., electronic quick start, ELBA, inverter type fluorescent lamp).

Never use any of the following for maintenance on the LG LRNU12GSER0:

• Water hotter than 40°C. This could cause deformation and/or discoloration.
• Volatile substances. These could damage the surfaces of the air conditioner.

The air filters behind the front panel/grill of the LG LRNU12GSER0 should be checked and cleaned once every 2 weeks or more often if necessary.

Clean the air filters of the LG LRNU12GSER0 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 LRNU12GSER0 should be checked and cleaned once every 3 months or more often if necessary.

Clean the plasma filters of the LG LRNU12GSER0 with a vacuum cleaner. If they are dirty, wash them with water and dry well in the shade, then install them back in place.

Remove the deodorizer filters from behind the air filter of the LG LRNU12GSER0 and expose them to direct sunlight for 2 hours. Then insert these filters into their original position.

For Type 1 LG LRNU12GSER0 models, open the upside of the panel and lift it up. The hooks of the panel will come off. Remove the air filters, then pull out the plasma filter.

For Type 2 LG LRNU12GSER0 models, open the front panel. 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.

Do not touch the plasma filter of the LG LRNU12GSER0 within 10 seconds after opening the inlet grille, as it may cause an electric shock.

When the LG LRNU12GSER0 air conditioner is not going to be used for a long time:

1. Operate the air conditioner at the following settings for 2 to 3 hours: Fan operation mode. This will dry out the internal mechanisms.

2. Turn off the breaker. Turning off the breaker is crucial, as dirt may collect and cause a fire if left on.

When the LG LRNU12GSER0 air conditioner is to be used again:

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.

If the air filters of the LG LRNU12GSER0 become clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air conditioner will be wasted. Blockages in the air filter reduce airflow and lower cooling and dehumidifying effects. Clean the air filter at least once every two weeks.

Overcooling the room with the LG LRNU12GSER0 is not good for health and wastes electricity.

Keep blinds or curtains closed to prevent direct sunshine from entering the room when the LG LRNU12GSER0 air conditioner is in operation.

Adjust the vertical and horizontal airflow direction of the LG LRNU12GSER0 to ensure a uniform temperature in the room.

Avoid opening doors and windows as much as possible to keep the cool air in the room, making sure they are shut tight while the LG LRNU12GSER0 is operating.

Since windows are kept closed, it is a good idea to open them and ventilate the room now and then when using the LG LRNU12GSER0.

If the LG LRNU12GSER0 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?

A peculiar odor in the room when using the LG LRNU12GSER0 may not be from the air conditioner, but a damp smell exuded by the walls, carpet, furniture, or cloth items in the room.

Condensation occurs when the airflow from the LG LRNU12GSER0 air conditioner cools the warm room air.

This is a protector of the mechanism of the LG LRNU12GSER0. Wait about three minutes, and operation will begin.

If the LG LRNU12GSER0 does not cool or heat effectively, check the following:

• Is the air filter dirty? Refer to the 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 LRNU12GSER0 can be due to:

• 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 LRNU12GSER0 is generated by the expansion/constriction of the front panel, etc., due to changes in temperature.

If the remote control display for the LG LRNU12GSER0 is faint or has no display, check the following:

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

To turn off the Filter sign lamp (LED) for the LG LRNU12GSER0 after cleaning the filter, press the Timer button and an associated timer setting button of the wired remote controller at the same time for 3 seconds.