LG AIR CONDITIONER User Manual

WALL MOUNTED

Please read this manual carefully before operating your set and retain it for future reference.

The equipment complies with requirements of the Technical Regulation, in terms of restrictions for the use of certain dangerous substances in electrical and electronic equipment.

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www.lg.com

OWNER’S MANUAL

AIR CONDITIONER

MFL67647014

Rev.00_120518

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TABLE OF CONTENTS

SAFETY INSTRUCTIONS...................................3

IMPORTANT SAFETY INSTRUCTIONS .............................3

BEFORE USE .....................................................8

Components.........................................................................8

Using the remote control ......................................................9

BASIC FUNCTIONS..........................................12

Cooling your room..............................................................12

Heating your room..............................................................12

Removing humidity.............................................................12

Airing your room.................................................................13

Adjusting the fan speed......................................................13

Adjusting the air flow direction ...........................................13

Setting the timer .................................................................13

ADVANCED FUNCTIONS.................................15

Using the °C/°F Conversion Function ................................15

Changing room temperature quickly ..................................15

Indoor air purification..........................................................15

Auto operation....................................................................16

Auto Changeover operation ...............................................16

Energy saving cooling mode ..............................................17

Display screen brightness ..................................................17

Operating the air conditioner without the remote control ...17

Restarting the air conditioner automatically .......................17

MAINTENANCE ................................................18

Cleaning the air filter ..........................................................20

TROUBLESHOOTING ......................................21

Self-diagnosis Function......................................................21

Before Calling for Service ..................................................21

This manual may contain images or content different from the model you purchased. This manual is subject to revision by the manufacturer.

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SAFETY INSTRUCTIONS

The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect operation of the appliance.

The guidelines are separated into ‘WARNING’ and ‘CAUTION’ as described below.

This symbol is displayed to indicate matters and operations that can cause risk. Read the part with this symbol carefully and follow the instructions in order to avoid risk.

This indicates that the failure to follow the instructions can cause serious injury or death.

WARNING

This indicates that the failure to follow the instructions can cause the minor injury or damage to the product.

CAUTION

IMPORTANT SAFETY INSTRUCTIONS

To reduce the risk of explosion, fire, death, electric shock, injury or scalding to persons when using this product, follow basic precautions, including the following:

Children in the Household

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

WARNING

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Installation

• Do not install the air conditioner on an unstable surface or in a place where there is danger of it falling.

• Contact an authorized service center when installing or relocating the air conditioner.

• Install the panel and the cover of the control box safely.

• Do not install the air conditioner in a place where flammable liquids or gases such as gasoline, propane, paint thinner, etc., are stored.

• Make sure that the pipe and the power cable connecting the indoor and outdoor units are not pulled too tight when installing the air conditioner.

• Use standard circuit breaker and fuse that conform to the rating of the air conditioner.

• Do not input air or gas into the system except with the specific refrigerant.

• Use non-flammable gas (nitrogen) to check for leak and to purge air; using compressed air or flammable gas may cause fire or explosion.

• The indoor/outdoor wiring connections must be secured tightly, and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose connections can cause heat generation or fire.

• Install dedicated electric outlet and circuit breaker before using the air conditioner.

• Do not connect the ground wire to a gas pipe, a lightning rod, or a telephone ground wire.

Operation

• Be sure to use only those parts listed in the service parts list. Never attempt to modify the equipment.

• Make sure that children do not climb on or hit the outdoor unit.

• Dispose of the batteries in a place where there is no danger of fire.

• Use only the refrigerant specified on the air conditioner label.

• Cut off the power supply if there is any noise, smell, or smoke coming from the air conditioner.

• Do not leave flammable substances such as gasoline, benzene, or thinner near the air conditioner.

• Contact an authorized service center when the air conditioner is submerged by flood waters.

• Do not use the air conditioner for an extended period of time in a small place without proper ventilation.

• In the event of a gas leak (such as Freon, propane gas, LP gas, etc.) ventilate sufficiently before using the air conditioner again.

• To clean the interior, contact an authorized service center or dealer. Using harsh detergents may cause corrosion or damage to the unit.

• Be sure to ventilate sufficiently when the air conditioner and a heating appliance such as a heater are used simultaneously.

• Do not block the inlet or outlet of air flow.

• Do not insert hands or other objects through the air inlet or outlet while the air conditioner is operating.

• Make sure that the power cable is neither dirty, loose, nor broken.

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• Never touch, operate, or repair the air conditioner with wet hands.

• Do not place any objects on the power cable.

• Do not place a heater or other heating appliances near the power cable.

• Do not modify or extend the power cable. Scratches or peeling insulation on the power cables may result in fire or electric shock, and should be replaced.

• Cut off the power supply immediately in the event of a blackout or a thunderstorm.

• Take care to ensure that power cable could not be pulled out or damaged during operation.

• Do not touch refrigerant pipe, water pipe and any internal parts while the unit is operating or immediately after operation.

Maintenance

• Do not clean the appliance by spraying water directly onto the product.

• Before cleaning or performing maintenance, disconnect the power supply and wait until the fan stops.

Technical Safety

• Installation or repairs made by unauthorized persons can pose hazards to you and others.

• The information contained in the manual is intended for use by a qualified service technician who is familiar with the safety procedures and equipped with the proper tools and test instruments.

• Failure to read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

• The appliance shall be installed in accordance with national wiring regulations.

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

• This appliance must be properly grounded to minimize risk of electric shock.

• Do not cut or remove the grounding prong from the power plug.

• Attaching the earth wire to the power outlet cover screw does not ground the appliance unless the cover screw is metal, uninsulated, and the power outlet is grounded through house wiring.

• If you have any doubt whether the air conditioner is properly grounded, have the power outlet and circuit checked by a qualified electrician.

• The refrigerant and insulation blowing gas used in the appliance require special disposal procedures. Consult a service agent or a similarly qualified person before disposing of them.

• If the supply cord is damaged, it must be replaced by the manufacturer or its service agents or similarly qualified person in order to avoid a hazard.

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To reduce the risk of minor injury to persons, malfunction, or damage to the product or property when using this product, follow basic precautions, including the following:

Installation

• Do not install the air conditioner in an area where it is directly exposed to sea wind (salt spray).

• Install the drain hose properly for the smooth drainage of water condensation.

• Exercise caution when unpacking or installing the air conditioner.

• Do not touch the leaking refrigerant during installation or repair.

• Transport the air conditioner with two or more people or use a forklift.

• Install the outdoor unit such that it is protected from direct sunlight. Do not place the indoor unit in a place where it is directly exposed to sunlight via the windows.

• Safely dispose of packing materials such as screws, nails or batteries using proper packaging after installation or repair.

• Install the air conditioner in a place where the noise from the outdoor unit or the exhaust fumes will not inconvenience the neighbors. Failure to do so may result in conflict with the neighbors.

Operation

• Remove the batteries if the remote control is not to be used for an extended period of time.

• Make sure that the filter is installed before operating the air conditioner.

• Be sure to check if there is a refrigerant leak after installing or repairing the air conditioner.

• Do not place any object on the air conditioner.

• Never mix different types of batteries, or old and new batteries for the remote control.

• Do not let the air conditioner run for a long time when humidity is very high or when a door or a window has been left open.

• Stop using the remote control if there is a fluid leak in the battery. If your clothes or skin are exposed to the leaking battery fluid, wash off with clean water.

• Do not expose people, animals, or plants to the cold or hot wind from the air conditioner for extended periods of time.

• If the leaking battery fluid has been swallowed, rinse the inside of the mouth thoroughly and consult a doctor.

• Do not drink the water drained from the air conditioner.

• Do not use the product for special purposes, such as preserving foods, works of art, and etc. It is an air conditioner for consumer purposes, not a precision refrigeration system. There is risk of damage or loss of property.

• Do not recharge or disassemble the batteries.

CAUTION

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Maintenance

• Never touch the metal parts of the air conditioner when removing the air filter.

• Use a sturdy stool or ladder when cleaning, maintaining, or repairing the air conditioner at a height.

• Never use strong cleaning agents or solvents when cleaning the air conditioner or spray water. Use a smooth cloth.

Disposal of Waste Batteries/Accumulators

• This symbol may be combined with chemical symbols for mercury (Hg), cadmium (Cd) or lead (Pb) if the battery contains more than 0.0005 % of mercury, 0.002 % of cadmium or 0.004 % of lead.

• All batteries/accumulators should be disposed separately from the municipal waste stream via designated collection facilities appointed by the government or the local authorities.

• The correct disposal of your old batteries/accumulators will help to prevent potential negative consequences for the environment, animal and human health.

• For more detailed information about disposal of your old batteries/accumulators, please contact your city office, waste disposal service or the shop where you purchased the product.

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BEFORE USE

Components

Indoor unit

* The feature can be changed according to type of model.

NOTE

The number of operation lamps and their locations may vary, depending on the model of the air conditioner.

Outdoor unit

* The feature can be changed according to type of model.

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Air Filte

Signal receiver

Front Panel

ON/OFF button

Air Discharge

ir Intake Vents

Connecting Wires

Piping

Air Outlet Vents

Drain Hose

Base Plate

Using the remote control

You can operate the air conditioner more conveniently with the remote control.

Wireless remote control

°C / °F (5 s)

TIME (3 s)

Control panel

Display

screen

Description

To select the fan mode.

To turn on/off air conditioner automatically at desired time.

To adjust the desired room temperature in cooling, heating or auto changeover mode.

To turn on/off the air conditioner.

To adjust the fan speed.

To select the cooling mode.

To select the heating mode.

To select the dehumidification mode.

To select the auto changeover/auto operation mode.

To change room temperature quickly.

To adjust the air flow direction vertically or horizontally.

To display the room temperature.

To change unit between °C and °F

To remove moisture generated inside the indoor unit.

To minimize power consumption.

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Display screen

Control

°C / °F (5 s)

TIME (3 s)

RESET

panel

* Some functions may not be supported, depending on the

model.

°C / °F (5 s)

TIME (3 s)

Control panel

Display

screen

Description

To set the brightness of the display on the indoor unit.

To set/cancel the function and timer.

- To adjust time.

- To set the current time.

To initialize the remote control settings.

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TIME (3 s)

°C / °F (5 s)

RESET

Display screen

Control panel

Inserting batteries

Insert batteries before using the remote control. The battery type used is AAA (1.5 V).

1. Remove the battery cover.

2. Fix the holder by fastening the 2 screws firmly with a screwdriver.

3. Slide the remote control into the holder.

Operating method

Point the remote control towards the signal receiver at the bottom of the air conditioner to operate it.

NOTE

• The remote control may operate other

electronic devices if pointed towards them. Make sure to point the remote control towards the signal receiver of the air conditioner.

• For proper operation, use a soft cloth to clean

the signal transmitter and receiver.

2. Insert the new batteries and make sure that the + and - terminals of the batteries are installed correctly.

3. Reattach the battery cover.

NOTE

If the display screen of the remote control starts to fade, replace the batteries.

Installing the remote control holder

Install the holder where there is no direct sunlight to protect the remote control.

1. Choose a safe and easily-accessible place.

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BASIC FUNCTIONS

NOTE

• Cooling-only models do not support this

function.

Removing humidity

(Dehumidifying operation)

This mode removes excess moisture from an environment with high humidity or in the rainy season, in order to prevent mold from setting in. This mode adjusts the room temperature and the fan speed automatically to maintain the optimal level of humidity.

1. Press

d to turn on the power.

2. Press

f repeatedly to select the

dehumidifying operation.

D is displayed on the display screen.

NOTE

• In this mode you cannot adjust the room temperature, as it is adjusted automatically. Also, the room temperature is not displayed on the display screen.

Cooling your room

(Cooling operation)

1. Press d to turn on the power.

2. Press

f repeatedly to select the cooling

operation.

A is displayed on the display screen.

3. Press

or Hto set the desired

temperature.

- The temperature range is 18 °C (64 °F) ~ 30 °C (86 °F).

Heating your room

(Heating operation)

1. Press d to turn on the power.

2. Press

f repeatedly to select the heating

operation.

B is displayed on the display screen.

3. Press

or Hto set the desired

temperature.

- The temperature range is 16 °C (60 °F) ~ 30 °C (86 °F).

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Remark Speed

High

Medium

Low

Natural Wind

Airing your room

(Air Circulation operation)

This mode only circulates the indoor air without changing the room temperature.

1. Press

d to turn on the power.

2. Press

E is displayed on the display screen.

Adjusting the air flow direction

1. To adjust the direction of the air flow

horizontally, press

N repeatedly and

select the desired direction.

- Select

: ; to adjust the direction of the

air flow automatically.

NOTE

• Adjusting the air deflector arbitrarily may cause product failure.

• If you restart the air conditioner, it starts to operate with the previously set direction of air flow, so the air deflector may not match the icon displayed on the remote control. When

this occurs, press

N to adjust the direction

of the air flow again.

Setting the timer

You can use the timer function to save energy and to use the air conditioner more efficiently.

Setting the current time

1. Press and hold it for longer than 3

seconds.

- The AM/PM icon flickers at the bottom of the display screen.

3. Press

g to adjust the fan speed.

Adjusting the fan speed

1. Press g repeatedly to adjust the fan

speed.

- Select 5 if you want natural air.

The fan speed adjusts automatically.

2. Press

or Fto select the minutes.

3. Press to finish.

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Turning on the air conditioner automatically at a set time

1. Press m .

- The icon below flickers at the bottom of the display screen.

Canceling the timer setting

1. Press p .

- To cancel all timer settings, press p .

Setting sleep mode

Use the sleep mode to turn off the air conditioner automatically when you go to sleep.

1. Press

d to turn on the power.

2. Press

l .

3. Press

or Fto select the hour

(up to 7 hours).

4. Press

p to finish.

T is displayed on the display screen in

sleep mode.

NOTE

• In the Cooling and Dehumidifying modes, the temperature increases by 1 °C after 30 minutes and by a further 1 °C after another 30 minutes for a more comfortable sleep. The temperature increases with up to 2 °C from the preset temperature.

2. Press

or Fto select the minutes.

3. Press

p to finish.

NOTE

• When setting the timer, current time and ON icon are displayed on the display screen indicating that the desired time is set.

Turning off the air conditioner automatically at a set time

1. Press n .

- The icon below flickers at the bottom of the display screen.

2. Press

or Fto select the minutes.

3. Press

p to finish.

NOTE

• When setting the timer, current time and OFF icon are displayed on the display screen indicating that the desired time is set.

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ADVANCED FUNCTIONS

The air conditioner offers some additional advanced functions.

Using the °C/°F Conversion Function

This function changes unit between °C and °F.

Press and hold button about 5 seconds.

Changing room temperature quickly

(Jet Cool/Heat operation)

This mode allows you to cool indoor air quickly in summer or warm it quickly in winter.

1. Press

d to turn on the power.

2. Press

°C / °F (5 s)

- In jet cooling mode, strong air blows out at a temperature of 18 °C (64 °F) for 30 minutes.

- In jet heating mode, strong air blows out at a temperature of 30 °C (86 °F) for 30 minutes.

NOTE

• In Air Circulation, Auto, or Auto Changeover mode, this function cannot be used.

• This function may not be supported, depending on the model.

Indoor air purification

Auto Clean operation (optional)

In the cooling and dehumidifying operations, moisture is generated inside the indoor unit.

Use the auto cleaning function to remove such moisture.

1. Press c.

J is displayed on the display screen.

- If you turn off the power, the fan operates for 30 minutes and cleans the inside of the indoor unit.

NOTE

• Some buttons cannot be used while the auto cleaning function is in operation.

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°C / °F (5 s)

Auto operation

(Artificial intelligence)

Cooling-only models

In this mode, the fan speed and the temperature adjust automatically, based on the room temperature.

1. Press

d to turn on the power.

2. Press

f repeatedly to select auto

operation.

3. Press

or Hto select the desired

operation code if the temperature is higher or lower than the desired temperature.

Auto Changeover operation

Cooling & Heating Model

This mode changes the operation mode automatically to maintain the set temperature at ±2 °C.

1. Press

d to turn on the power.

2. Press

f repeatedly to select the auto

changeover operation.

C is displayed on the display screen.

NOTE

• In this mode, you cannot adjust the fan speed, but you can set the air deflector to rotate automatically.

• This function may not be supported, depending on the model.

3. Press

or Hto set the desired

temperature.

- The temperature range is 18 °C (64 °F) ~ 30 °C (86 °F).

4. Press

g repeatedly to select the fan speed.

NOTE

• This function may not be supported, depending on the model.

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Code Description

2 Cold 1 A little cold

Maintain room

temperature

A little hot-1 Hot-2

Energy saving cooling mode

This mode minimizes power consumption during cooling and increases the set temperature to the optimal level for a more comfortable environment. The temperature automatically settles at 22 °C (72 °F) if desired temperature is below 22 °C (72 °F) The temperature remains constant if it is above 22 °C (72 °F).

1. Press

d to turn on the power on.

2. Press

f repeatedly to select the cooling

operation.

3. Press

G is displayed on the display screen.

Operating the air conditioner without the remote control

You can use the On/Off button of the indoor unit to operate the air conditioner when the remote control is unavailable.

Restarting the air conditioner automatically

When the air conditioner is turned on again after a power failure, this function restores the previous settings. This function is a factory default setting.

Disabling auto restart

1. Press the ON/OFF button and hold it for 6 seconds, then the unit will beep twice and the lamp will blink twice 4 times.

- To re-enable the function, press the On/ Off button and hold it for 6 seconds. The unit will beep twice and the lamp will blink 4 times.

* The feature can be changed according to

type of model.

NOTE

• If you press and hold the On/Off button for 3 ~ 5 seconds instead of 6 seconds, the unit will switch to the test operation. In the test operation, the unit blows out strong air for cooling for 18 minutes and then returns to the factory default settings.

NOTE

• This function may not be supported, depending on the model.

Display screen brightness

You can adjust the brightness of the indoor unit display screen.

1. Press \ repeatedly to set the brightness

to the desired level.

NOTE

• This function may not be supported, depending on the model.

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Signal

receiver

Front Panel

ON/OFF button

Air Discharge

Air Filte

MAINTENANCE

Type Description Interval

Air filter See “Cleaning the filter.” 2 weeks

Indoor unit

Clean the Indoor unit surface by using a soft, dry cloth. Regularly

Clean the condensate drain pipe. Every 4 months

Clean the condensate drain pan. Once a year

Thoroughly clean the heat exchanger. Once a year

Replace the remote control batteries. Once a year

Outdoor unit

Use steam to clean the heat exchanger coils and the panel vents. (consult with technician)

Regularly

Clean the fan. Once a year

Clean the condensate drain pan. Once a year

Verify that all the fan assembly is firmly tightened. Once a year

Verify that electric components with jets of air. Once a year

Clean the electric components with jets of air. Once a year

If the air conditioner will not be used for an extended of time, dry the air conditioner to maintain it in best condition.

1. Dry the air conditioner in Fan mode for 3 to 4 hours and disconnect the power plug. There may be internal damage if moisture is left in components.

2. Before using the air conditioner again, dry the inner components of the air conditioner in Fan mode for 3 to 4 hours. This will help to remove odor which is generated from moisture.

Clean the product regularly to maintain optimal performance and to prevent possible breakdown.

* This may not be provided, depending on the model.

* The feature can be changed according to type of model.

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Air Filter

Signal receiver

Front Panel

ON/OFF button

Air Discharge

CAUTION

• Turn off the power and unplug the power cord before you perform any maintenance; otherwise it may cause electric shock.

• Never use water that is hotter than 40 °C when you clean the filters. It may cause deformation or discoloration.

• Never use volatile substances when you clean the filters. They may damage the surface of the product.

NOTE

• The location and shape of the filters may differ, depending on the model.

• Make sure to clean the heat exchanger coils of the outdoor unit regularly, as dirt collected in the coils may decrease the operational efficiency or increase energy costs.

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Front panel

Clean the air filter

Clean the air filter once every 2 weeks or more if necessary.

1. Pull out the upper section of front panel and lift it up.

2. Take out a filter with front panel held.

Air filter

3. Clean the filter with a vacuum cleaner or with warm water. If dirt is difficult to remove, wash the filter in lukewarm water with neutral detergent.

4. Dry it completely in the shade after cleaning.

5. Then set a filter orderly.

Front panel

hook

Hook

-hanger

Air filter

6. Put the hook of front panel onto the hanger, in order to close the front panel.

NOTE

• The location of the filters may differ,

depending on the model.

• The plasma filter may not be included in

some models.

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TROUBLESHOOTING

Self-diagnosis Function

This product has a built-in self-diagnosis function. If an error occurs, the lamp of the indoor unit will blink in 2 second intervals. If this occurs, contact your local dealer or service center.

Before Calling for Service

Please check the following before you contact the service center. If the problem persists, contact your local service center.

Problem Possible Causes Corrective Action

The air conditioner does not work normally.

Burning smell and strange sounds are coming from the unit.

• Turn off the air conditioner, switch OFF, or disconnect the power supply, and contact the service center.

Water leaks from the indoor unit even when the humidity level is low.

The power cable is damaged or it is generating excessive heat.

A switch, a circuit breaker (safety, ground), or a fuse is not operated properly.

The unit generates an error code from its self-diagnosis.

The air conditioner does not work.

The air conditioner is unplugged.

• Check whether the power cord is plugged into the outlet or the power isolators are switched on.

A fuse exploded, or the power supply is blocked.

• Replace the fuse or check if the circuit breaker has tripped.

A power failure has occurred.

• Turn off the air conditioner when a power failure occurs.

• When the power is restored, wait 3 minutes, and then turn on the air conditioner.

The voltage is too high or too low.

• Check if the circuit breaker has tripped.

The air conditioner was turned off automatically at a preset time.

• Turn the air conditioner on.

The battery setting in the remote controller is incorrect.

• Make sure that the batteries are inserted correctly in your remote controller.

• If the batteries are placed correctly, but the air conditioner still does not operate, replace the batteries and try again.

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Problem Possible Causes Corrective Action

The air conditioner does not emit cool air.

Air is not circulating properly.

• Make sure that there are no curtains, blinds, or pieces of furniture blocking the front of the air conditioner.

The air filter is dirty.

• Clean the air filter once every 2 weeks.

• See “Clean the Air Filter” for more information.

The room temperature is too high.

• In summer, cooling the indoor air fully may take some time. In this case, select the Jet Mode to cool the indoor air quickly.

Cold air is escaping from the room.

• Make sure that no cold air is escaping through the ventilation points in the room.

The desired temperature is higher than the current temperature.

• Set the desired temperature to a level lower than the current temperature.

There is a heating source nearby.

• Avoid using heat generators like electric ovens or gas burners while the air conditioner is in operation.

Fan Mode is selected.

• During Fan Mode, air blows from the air conditioner without cooling or heating the indoor air.

• Switch the operation mode to cooling operation.

Outside temperature is too high.

• The cooling effect may not be sufficient.

The fan speed cannot be adjusted.

The Jet Mode, or Auto Operation Mode is selected.

• In some operation modes, you cannot adjust the fan speed. Select an operation mode in which you can adjust the fan speed.

The temperature cannot be adjusted.

The Fan Mode or Jet Mode is selected.

• In some operation modes, you cannot adjust the temperature. Select an operation mode in which you can adjust the temperature.

The air conditioner stops during operation.

The air conditioner is suddenly turned off.

• The Timer Function may have timed out, which turns the unit off. Check the timer settings.

A power failure has occurred during operation.

• Wait for the power to come back. If you have the Auto Restart function enabled, your unit will resume its last operation several minutes after power is restored.

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