LG I38TKF User Manual

Displayed below is the user manual for I38TKF by LG which is a product in the Split-System Air Conditioners category. This manual has pages.

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OWNER’S MANUAL

AIR CONDITIONER

TYPE: WALL MOUNTED

MFL69781602

Rev.08_120720

Read this owner's manual thoroughly before operating the

appliance and keep it handy for reference at all times.

EN ENGLISH AR

ةيبرعلا

TABLE OF CONTENTS This manual may contain images or

content different from the model you

purchased.

This manual is subject to revision by the

manufacturer.

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

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

OPERATION ....................................................................... 11

Notes for Operation .............................................................................. 11

Parts and Functions .............................................................................. 11

Wireless Remote Control ......................................................................12

Restarting the Air Conditioner Automatically ........................................17

Using the Mode Function ......................................................................17

Using the Jet Mode Function ................................................................ 19

Using the Fan Speed Function .............................................................20

Using the Air Flow Direction Function ...................................................20

Setting the On/Off Timer ....................................................................... 21

Using the Sleep Function (Optional) .....................................................22

Using the Simple Timer Function (Optional) ......................................... 22

Using the Energy Display Function (Optional) ......................................23

Using the Light Off Function (Optional) ................................................23

Using the Comfort Air Function (Optional) ............................................ 23

Using the Energy Saving Function (Optional) ......................................24

Using the Energy Control Function (Optional) ...................................... 24

Using the Generator Mode Function (Optional) ....................................25

Using Special Functions .......................................................................26

SMART FUNCTIONS ......................................................... 29

LG ThinQ Application ............................................................................29

Smart Diagnosis ...................................................................................31

MAINTENANCE .................................................................. 32

Clean the Air Filter ................................................................................34

Clean the Micro Dust, Triple and Allergy Filter (Optional) .....................35

TROUBLESHOOTING ....................................................... 36

SAFETY INSTRUCTIONS EN

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.

WARNING

This indicates that the failure to follow the instructions can

cause serious injury or death.

CAUTION

This indicates that the failure to follow the instructions can

cause the minor injury or damage to the product.

IMPORTANT SAFETY INSTRUCTIONS

WARNING

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.

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.

•Means for disconnection must be incorporated in the fixed wiring

in accordance with the wiring rules.

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.

•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, its service agent or similarly qualified person in

order to avoid a hazard.

CAUTION

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.

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.

OPERATION EN

Notes for Operation

Suggestion for Energy Saving

•Do not over-cool the space. This may be harmful for your health and may consume more

electricity.

•Block sunlight with blinds or curtains while you are operating the air conditioner.

•Keep doors or windows closed tightly while you are operating the air conditioner.

•Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

•Speed up the fan to cool or warm indoor air quickly, within a short period of time.

•Open windows regularly for ventilation. The indoor air quality may deteriorate if the air conditioner

is used for long durations.

•Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the

air flow or reduce the unit performance.

Parts and Functions

Indoor Unit Outdoor Unit

Air Filter

Air Intake

Front Cover

Air Outlet

Air Deflector (Horizontal Vane)

Air Deflector (Vertical Louver)

On/Off Button

Air Intake Vents

Air Outlet Vents

NOTE

•The number and location of operation lamps may vary according to the model of the air

conditioner.

•The feature may be changed according to the type of model.

Wireless Remote Control

Inserting Batteries

If the display screen of the remote control

begins to fade, replace the batteries. Insert AAA

(1.5 V) batteries before using the remote

control.

1Remove the battery cover.

2Insert the new batteries and make sure that

the + and - terminals of the batteries are

installed correctly.

Installing the Remote Control

Holder

To protect the remote control, install the holder

where there is no direct sunlight.

1Choose a safe and easily accessible

location.

2Fix the holder by fastening 2 screws firmly

with a screwdriver.

Operating Method

Point the remote control towards the signal

receiver at the right side of the air conditioner to

operate it.

NOTE

•The remote control may operate other

electronic devices if it is directed towards

them. Make sure to point the remote control

towards the air conditioner signal receiver.

•For proper operation, use a soft cloth to clean

the signal transmitter and receiver.

•In case of a function not provided in the

product, no buzzer sound occurs from the

product when a button for such function on

the remote control is pressed except for Air

Flow Direction (

SWING

), Energy Display (

kW [3 s]

Air Purification function ( ).

Setting the Current Time

1Insert batteries.

•The icon below blinks at the bottom of the

display screen.

2Press or button to select the

minutes.

3Press SET/CANCEL button to finish.

NOTE

•The On/Off Timer is available after setting the

current time.

Using the °C/°F Conversion

Function (Optional)

This function changes unit between °C and °F

•Press and hold

℃↔℉ [5 s]

SWING

button about 5 seconds.

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.

1Open the front cover (Type2) or horizontal

vane (Type1).

2Press the ON/OFF button.

Type1

ON/OFF

Type2

ON/OFF

NOTE

•The stepping motor may be broken, if the

horizontal vane opens rapidly.

•The fan speed is set to high.

•The feature may be changed according to the

type of model.

•The temperature cannot be altered when

using this emergency ON/OFF button.

•For cooling-only models, the temperature is

set to 22 °C

•For cooling & heating models, the temperature

is set from 22 °C to 24 °C

Using Wireless Remote Control

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

SWING

kW [3 s]

℃↔℉ [5 s] DIAGNOSIS [5 s]

SWING

SET UP

ROOM

TEMP

JET

MODE

TEMP

FAN

SPEED

FUNC.

TIMER CANCEL

SET

CANCEL

RESET

Button Display

Screen Description

-To turn on/off the air conditioner.

To adjust the desired room

temperature in cooling, heating or auto

changeover mode.

MODE

To select the cooling mode.

To select the heating mode.

To select the dehumidification mode.

To select the fan mode.

To select the auto changeover/auto

operation mode.

JET

MODE To change room temperature quickly.

FAN

SPEED To adjust the fan speed.

SWING

To adjust the air flow direction

vertically or horizontally.

NOTE

•* buttons may be changed according to the type of model.

SWING

kW [3 s]

℃↔℉ [5 s] DIAGNOSIS [5 s]

SWING

SET UP

ROOM

TEMP

JET

MODE

TEMP

FAN

SPEED

FUNC.

TIMER CANCEL

SET

CANCEL

RESET

Button Display

Screen Description

TIMER

To turn on/off air conditioner

automatically at desired time.

SET/

CANCEL -To set/cancel the special functions and

timer.

CANCEL

-To cancel the timer settings.

-To adjust time.

*LIGHT

OFF -To set the brightness of the display on

the indoor unit.

ROOM

TEMP To display the room temperature.

°C↔°F [5 s] To change unit between °C and °F

*ENERGY

SAVING To minimize power consumption.

*COMFORT

AIR To adjust the air flow to deflect wind.

kW [3 s] -To set whether or not to display

information regarding energy.

*ENERGY

CTRL To bring the effect of the power saving.

*COMFORT

SLEEP

To make a comfortable sleeping

environment.

DIAGNOSIS

[5 s] -To conveniently check maintenance

information of a product.

*GEN

MODE -To operate air conditioner under the

previously set power consumption.

SWING

kW [3 s]

℃↔℉ [5 s] DIAGNOSIS [5 s]

SWING

SET UP

ROOM

TEMP

JET

MODE

TEMP

FAN

SPEED

FUNC.

TIMER CANCEL

SET

CANCEL

RESET

Button Display

Screen Description

FUNC.

The Ion generator uses millions of ions

to help improve indoor air quality.

To reduce noise from outdoor units.

To keep your skin moisturized by

generating ion clusters.

To lower indoor humidity quickly.

To maintain a minimum room

temperature and prevent objects in the

room from freezing.

To scare away a mosquito.

To remove moisture generated inside

the indoor unit.

To make a comfortable sleeping

environment.

RESET - To initialize the remote control settings.

NOTE

•Some functions may not be supported, depending on the model.

•* buttons may be changed according to the type of model.

•Press the SET/CANCEL button to operate the selected FUNC.

Restarting the Air Conditioner

Automatically

When the air conditioner is turned on again

after a power failure, this function restores the

previous settings.

Disabling Auto Restart

1Open the front cover (Type2) or horizontal

vane (Type1).

2Press 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.

Type1

ON/OFF

Type2

ON/OFF

NOTE

•The feature may be changed according to the

type of model.

•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 cooling air

for 18 minutes and then returns to factory

default settings.

Using the Mode Function

This function allows you to select the desired

function.

Cooling Only Model

Cooling Mode

Auto Operation(AI) Mode

Dehumidification Mode

Fan Mode

Cooling & Heating Model

Cooling Mode

Auto Changeover Mode

Dehumidification Mode

Heating Mode

Fan Mode

Cooling Mode

1Turn the appliance on.

2Press MODE button repeatedly to select the

Cooling Mode.

• is displayed on the display screen.

3Press or button to set the desired

temperature.

Auto Operation (Artificial

Intelligence)

Cooling Only Model

This mode automatically sets the fan speed and

temperature depending on the room

temperature.

1Turn the appliance on.

2Press MODE button repeatedly to select the

Auto Operation.

• is displayed on the display screen.

3Press or button to select the desired

operation code if the temperature is higher

or lower than the desired temperature.

Code Description

2 Cold

1A little cold

0Maintain room temperature

-1 A little hot

-2 Hot

NOTE

•In this mode, you cannot adjust the fan speed,

but you can set the air deflector to rotate

automatically.

Auto Changeover Mode

Cooling & Heating Model

This mode changes the mode automatically to

maintain the set temperature at ±2 °C

1Turn the appliance on.

2Press MODE button repeatedly to select the

Auto Changeover Mode.

• is displayed on the display screen.

3Press or button to set the desired

temperature.

4Press FAN SPEED button to adjust the fan

speed.

Dehumidification Mode

This mode removes excess moisture from a

highly humid environment or during the rainy

season, in order to prevent mildew from setting

in. This mode adjusts the room temperature and

the fan speed automatically to maintain the

optimal level of humidity.

1Turn the appliance on.

2Press MODE button repeatedly to select the

Dehumidification Mode.

• is displayed on the display screen.

NOTE

•In this mode you cannot adjust the room

temperature, it is adjusted automatically.

•The room temperature is not displayed on the

display screen.

•In the dehumidification mode, compressor and

indoor fan may not operate when the room

temperature is below 24 °C

Heating Mode

1Turn the appliance on.

2Press MODE button repeatedly to select the

Heating Mode.

• is displayed on the display screen.

3Press or button to set the desired

temperature.

NOTE

• will be displayed on the indoor unit when

defrosting is operating.

•Furthermore, this indication will be displayed

on the indoor unit:

−When preheating is operating.

−When the room temperature has been

reached to the set temperature.

Fan Mode

This mode only circulates the indoor air without

changing the room temperature.

1Turn the appliance on.

2Press MODE button repeatedly to select the

Fan Mode.

• is displayed on the display screen.

3Press FAN SPEED button to adjust the fan

speed.

Using the Jet Mode Function

Changing Room Temperature

Quickly

This function allows you to cool indoor air

quickly during the summer or warm it quickly

during winter.

•Cooling & Heating model : The Jet Mode

function is available with Cooling, Heating and

Dehumidification Mode.

•Cooling Only model : The Jet Mode function is

available with Cooling, Dehumidification, Fan,

Auto Operation Mode and Air Purification

function.

1Turn the appliance on.

2Press MODE button repeatedly to select the

desired mode.

3Press JET MODE button.

• is displayed on the display screen.

NOTE

•Jet Heating Mode is not available on some

models.

•In Jet Cooling Mode, strong air blows out for

30 minutes.

•After 30 minutes later, setting temperature is

maintaining 20 °C

If you want to change the temperature, Press

or button to set the desired

temperature.

•In Jet Heating Mode, strong air blows out for

30 minutes.

•After 30 minutes later, setting temperature is

maintaining 30 °C

If you want to change the temperature, Press

or button to set the desired

temperature.

•This function may operate differently from the

remote control display.

Using the Fan Speed

Function

Adjusting the Fan Speed

•Press FAN SPEED button repeatedly to adjust

the fan speed.

Display Screen Speed

High

Medium - High

Medium

Medium - Low

Low

-Natural Wind

NOTE

•The fan speed of Natural Wind adjusts

automatically.

→ →

•The fan speed icons are displayed on some

indoor units.

→ → → →

•Indoor unit display is displayed only 5 seconds

and return to the setting temperature on some

models.

Using the Air Flow Direction

Function

This function adjusts the direction of the air flow

vertically (horizontally).

•Press

SWING

(

SWING

) button repeatedly and select

the desired direction.

−Select ( ) to adjust the direction of the

air flow automatically.

NOTE

•Adjusting the air flow direction horizontally

may not be supported, depending on the

model.

•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

SWING

button to

adjust the direction of the air flow again.

•This function may operate differently from the

remote control display.

Setting the On/Off Timer

This function sets the air conditioner to turn on/

off automatically at desired time.

On/Off Timer can be set together.

Setting the On Timer

1Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

2Press or button to select the

minutes.

3Press SET/CANCEL button to finish.

•After setting the timer, current time and

icon are displayed on the display

screen indicating that the desired time is

set.

Canceling the On Timer

1Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

2Press SET/CANCEL button to cancel the

setting.

Setting the Off Timer

1Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

2Press or button to select the

minutes.

3Press SET/CANCEL button to finish.

•After setting the timer, current time and

icon are displayed on the display

screen indicating that the desired time is

set.

NOTE

•This function is disabled when you set Simple

Timer.

Canceling the Off Timer

1Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

2Press SET/CANCEL button to cancel the

setting.

Canceling the Timer Setting

•Press

CANCEL

button to cancel all timer settings.

Using the Sleep Function

(Optional)

This function turns off the air conditioner

automatically when you go to sleep.

1Turn the appliance on.

2Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

3Press or button to select the hour

(up to 7 hours).

4Press SET/CANCEL button to finish.

• is displayed on the display screen.

NOTE

• is displayed on some indoor units.

•Indoor unit display is displayed from 1H to 7H

which is displayed only 5 seconds and then

return to the setting temperature.

•In the Cooling and Dehumidification Mode, the

temperature increases by 1 °C after 30

minutes and additional 1 °C after another 30

minutes for a more comfortable sleep.

•The temperature increases up to 2 °C from

the preset temperature.

•Although the remark for fan speed on the

display screen may be changed, the fan

speed is adjusted automatically.

Using the Simple Timer

Function (Optional)

This function turns off the air conditioner

automatically when you go to sleep.

1Turn the appliance on.

2Press

TIMER

button repeatedly.

•The icon below blinks at the bottom of the

display screen.

3Press or button to select the hour

(up to 7 hours).

4Press SET/CANCEL button to finish.

• is displayed on the display screen.

NOTE

•This function is disabled when you set Off

Timer.

Using the Energy Display

Function (Optional)

This function displays the amount of electricity

generated on the indoor display as the product

operates.

Display the Current Energy Usage

1Turn the appliance on.

2Press

kW [3 s]

button and hold it about 3

seconds.

•The instantaneous power consumption (

kWh

) is displayed for a while on

some indoor units.

Display the Cumulative Energy

Usage (Optional)

1Turn the appliance on.

2Press

kW [3 s]

button and hold it about 3

seconds twice.

•The cumulative power consumption (

kWh

)

is displayed for a while on some indoor

units.

NOTE

•It is not displayed on the wireless remote

control.

•kW refers to instantaneous power

consumption.

•kWh refers to cumulative power consumption.

•If it is more than 99 kWh, which is the range

of expression, maintain it as 99 kWh.

•Power off resets its value.

•Display wattage under 10 kW(h) with 0.1

kW(h) unit, and display one over 10 kW(h)

with 1 kW(h) unit.

•The actual power may differ from the power

displayed.

Using the Light Off Function

(Optional)

Display Screen Brightness

You can set the brightness of the indoor unit

display screen.

•Press LIGHT OFF button.

NOTE

•Turn on/off the Display screen.

Using the Comfort Air

Function (Optional)

Comfort Vane Operation

This function conveniently sets the vane to a

preset position to deflect the supply air away

from blowing directly onto the occupants in the

room.

1Turn the appliance on.

2Press COMFORT AIR button repeatedly

and select the desired direction.

• or is displayed on the display

screen.

NOTE

• or is displayed on some indoor units.

•This function is disabled when you press

MODE or JET MODE button.

•This function is disabled and auto swing of

vertical direction is set up when you press

SWING

button.

•When this function is off, the horizontal vane

operates automatically depending on the set

mode.

Using the Energy Saving

Function (Optional)

This function 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 if desired

temperature is below 22 °C The temperature

remains constant if it is above 22 °C

1Turn the appliance on.

2Press MODE button repeatedly to select the

Cooling Mode.

3Press ENERGY SAVING button.

• is displayed on the display screen.

Using the Energy Control

Function (Optional)

1Turn the appliance on.

2Press ENERGY CTRL button.

•Press ENERGY CTRL button repeatedly

to select each step.

NOTE

•1 step : The power Input is decreased by 20

% compared to rated power input.

− is displayed on the display screen.

•2 step : The power Input is decreased by 40

% compared to rated power input.

− is displayed on the display screen.

•3 step (Optional) : The power Input is

decreased by 60 % compared to rated power

input.

− is displayed on the display screen.

• (1 step), (2 step) is displayed on some

indoor units.

•This function is available with Cooling Mode.

•Capacity may decrease when Energy Control

mode is selected.

•Desired temperature is displayed about 5

seconds if you press FAN SPEED, or

button.

•Room temperature is displayed about 5

seconds if you press ROOM TEMP button.

Using the Generator Mode

Function (Optional)

This function operate air conditioner under the

previously set power consumption.

1Turn the appliance on.

2Press GEN MODE button.

• or is displayed on some indoor

units.

NOTE

•It is not displayed on the remote control

display.

•This function is available with Cooling Mode.

•This function is disabled when you press

MODE or JET MODE button.

•When using Generator Power Supply, air

conditioner must use ‘Gen Mode’.(It may not

operate properly in Normal Mode.)

•When using Generator Power Supply, If there

are many applications being used together,

air-conditioner may not operate properly for

overload on Generator.

•Generator should be maintained properly

according to Manufacture’s Manual. Non-

properly maintained Generator may cause

unexpected effect on air-conditioner. (Engine

Oil, Fuel Level and continuous usage time

should be in Manufacturer recommended

condition.)

•Due to ‘Gen Mode’, inadequate cooling

capacity.

•‘Gen Mode’ is memorized. (In case of

restarting the Air-Conditioner during ‘Gen

Mode’. It operates ‘Gen Mode’ automatically.)

•When using Generator Power Source,

Outdoor Unit may operate the outdoor fan

Automatically for protecting the Air-

Conditioner.

Using Special Functions

1Turn the appliance on.

2Press FUNC button repeatedly to select the

desired function.

3Press SET/CANCEL button to finish.

Display

Screen Description

The Ion generator uses millions

of ions to help improve indoor

air quality.

To reduce noise from outdoor

units.

To keep your skin moisturized

by generating ion clusters.

To lower indoor humidity

quickly.

To maintain a minimum room

temperature and prevent

objects in the room from

freezing.

To scare away a mosquito.

To remove moisture generated

inside the indoor unit.

To make a comfortable sleeping

environment.

NOTE

•Some functions may not be supported,

depending on the model.

•Some functions may operate differently from

the remote control display.

Canceling Special Functions

1Press FUNC button repeatedly to select the

desired function.

2Press SET/CANCEL button to cancel the

function.

Using the Air Purification

Function

These functions supply clean and fresh air by

ion particles and the filter.

Function Display Description

Ionizer

Ion particles

from Ionizer

sterilize the

aerial bacteria

and other

harmful

substances.

Plasma

It removes

microscopic

contaminants

from the intake

air completely to

supply clean and

fresh air.

NOTE

•You can use this function without turning the

air conditioner on.

•Both the plasma lamp and the cooling lamp

light up while Smoke Away/Plasma is in

operation on some models.

•Do not touch ionizer during operation.

•This function may operate differently from the

remote control display.

Using the Silent Function

This function prevents potential claims by

neighbors, reducing noise from outdoor units.

• is displayed on the display screen.

NOTE

•This function is disabled when you press

MODE or ENERGY CTRL or JET MODE

button.

•This function is available with Cooling,

Heating, Auto Changeover, Auto Operation

Mode.

Using the Ion Care Function

This function keeps your skin moisturized by

generating ion clusters which is absorbed into

the surface of skin.

• is displayed on the display screen about 3

seconds.

NOTE

•This function is available with Cooling, Fan

Mode and Air Purification function.

Using the Jet Dry Function

This function maximizes the performance of

dehumidification.

•, are displayed on the display screen.

NOTE

•This function is available with Cooling,

Dehumidification, Auto Operation, Fan Mode

and Air Purification function.

•This function is not available with Sleep

function.

•This function is disabled when you press

MODE button.

Using the Low Heating Function

This function operates the heating system to

maintain a minimum room temperature and

prevent objects in the room from freezing where

there is no permanent resident, such as a

vacation.

•, are displayed on the display screen.

NOTE

•This function is available with Heating Mode.

•During LH operation, when you press buttons

such as , , MODE, FAN SPEED, and

then return to Heating Mode.

•If JET MODE button is pressed during LH

operation, this function is disabled and Power

Heating Mode is operated immediately. (only

for power heating model)

•In case an error occurred, operation can be

interrupted for the protection of the product.

•COMFORT AIR and

SWING

button cannot be

used while the LH function is in operation.

Using the Mosquito Away

Function

This function fans away mosquitos by

generating a high-frequency wave.

• is displayed on the display screen.

NOTE

•You can use this function without turning the

air conditioner on.

• is displayed on some indoor units.

Using the Auto Clean Function

In the Cooling and Dehumidification Mode,

moisture is generated inside the indoor unit.

This function removes such moisture.

• is displayed on the display screen.

NOTE

•Some functions cannot be used while the Auto

Clean function is in operation.

•If you turn off the unit, the fan continues to run

for 30 minutes and cleans the inside of the

indoor unit.

Using the Comfort Sleep Function

This function operates the air conditioner

automatically to make the comfortable sleep

environment.

•, are displayed on the display screen.

NOTE

•This function is available with Cooling Mode.

•The vane stops swing and sets indirect airflow

angle, after 30 minutes from start even though

the room temperature doesn’t decrease to

optimal temperature to sleep.

•It is possible that a comfortable sleep

environment is different according to the

people.

SMART FUNCTIONS EN

LG ThinQ Application

This feature is only available on models with the

or ThinQ logo.

The LG ThinQ application allows you to

communicate with the appliance using a

smartphone.

LG ThinQ Application Features

Communicate with the appliance from a

smartphone using the convenient smart

features.

Smart Diagnosis

•If you experience a problem while using the

appliance, this smart diagnosis feature will

help you diagnose the problem.

Settings

•Allows you to set various options on the

appliance and in the application.

NOTE

•If you change your wireless router, internet

service provider, or password, delete the

registered appliance from the LG ThinQ

application and register it again.

•The application is subject to change for

appliance improvement purposes without

notice to users.

•Functions may vary by model.

Before Using LG ThinQ

Application

1Check the distance between the appliance

and the wireless router (Wi-Fi network).

•If the distance between the appliance and

the wireless router is too far, the signal

strength becomes weak. It may take a

long time to register or installation may

fail.

2Turn off the Mobile data or Cellular Data

on your smartphone.

3Connect your smartphone to the wireless

router.

NOTE

•To verify the Wi-Fi connection, check that

icon on the control panel is lit.

•The appliance supports 2.4 GHz Wi-Fi

networks only. To check your network

frequency, contact your Internet service

provider or refer to your wireless router

manual.

•LG ThinQ is not responsible for any network

connection problems or any faults,

malfunctions, or errors caused by network

connection.

•If the appliance is having trouble connecting to

the Wi-Fi network, it may be too far from the

router. Purchase a Wi-Fi repeater (range

extender) to improve the Wi-Fi signal strength.

•The Wi-Fi connection may not connect or may

be interrupted because of the home network

environment.

•The network connection may not work

properly depending on the Internet service

provider.

•The surrounding wireless environment can

make the wireless network service run slowly.

•The appliance cannot be registered due to

problems with the wireless signal

transmission. Unplug the appliance and wait

about a minute before trying again.

•If the firewall on your wireless router is

enabled, disable the firewall or add an

exception to it.

•The wireless network name (SSID) should be

a combination of English letters and numbers.

(Do not use special characters.)

•Smartphone user interface (UI) may vary

depending on the mobile operating system

(OS) and the manufacturer.

•If the security protocol of the router is set to

WEP, you may fail to set up the network.

Please change it to other security protocols

(WPA2 is recommended) and register the

product again.

Installing the LG ThinQ

Application

Search for the LG ThinQ application from the

Google Play Store or Apple App Store on a

smartphone. Follow instructions to download

and install the application.

Open Source Software Notice

Information

To obtain the source code under GPL, LGPL,

MPL, and other open source licenses, that is

contained in this product, please visit http://

opensource.lge.com.

In addition to the source code, all referred

license terms, warranty disclaimers and

LG Electronics will also provide open source

code to you on CD-ROM for a charge covering

the cost of performing such distribution (such as

the cost of media, shipping, and handling) upon

email request to opensource@lge.com. This

offer is valid for a period of three years after our

last shipment of this product. This offer is valid

to anyone in receipt of this information.

Smart Diagnosis

This feature is only available on models with the

or logo.

Use this feature to help you diagnose and solve

problems with your appliance.

NOTE

•For reasons not attributable to LGE’s

negligence, the service may not operate due

to external factors such as, but not limited to,

Wi-Fi unavailability, Wi-Fi disconnection, local

app store policy, or app unavailability.

•The feature may be subject to change without

prior notice and may have a different form

depending on where you are located.

Using LG ThinQ to Diagnose

Issues

If you experience a problem with your Wi-Fi

equipped appliance, it can transmit

troubleshooting data to a smartphone using the

LG ThinQ application.

•Launch the LG ThinQ application and select

the Smart Diagnosis feature in the menu.

Follow the instructions provided in the LG

ThinQ application.

Using Audible Diagnosis to

Diagnose Issues

Follow the instructions below to use the audible

diagnosis method.

•Launch the LG ThinQ application and select

the Smart Diagnosis feature in the menu.

Follow the instructions for audible diagnosis

provided in the LG ThinQ application.

1Plug the power plug in the outlet properly.

2Place the mouthpiece of your smartphone

close to the or logo.

3Press and hold the DIAGNOSIS [5 s]

button for 5 seconds or longer while holding

the smartphone mouthpiece to the logo until

the data transfer is complete.

•Keep the smartphone in place until the

data transfer has finished. Time remaining

for data transfer is displayed.

4After the data transfer is complete, the

diagnosis will be displayed in the

application.

NOTE

•For best results, do not move the phone while

the tones are being transmitted.

•Be sure to keep ambient noise to a minimum

or the phone may not correctly receive the

buzzer beeps from the indoor unit.

MAINTENANCE EN

WARNING

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

stops.

If the air conditioner will not be used for an extended period of time, dry the air conditioner to

maintain it in best condition. Clean the product regularly to maintain optimal performance and to

prevent possible breakdown.

•Dry the air conditioner in Fan mode for 3 to 4 hours and disconnect the power. There may be

internal damage if moisture is left in its components.

•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 the odor generated from moisture.

Air Filter

•The feature may be changed according to the type of model.

Type Description Interval

Air filter Clean with a vacuum or hand wash. 2 weeks

Triple filter Clean with a vacuum or brush. Every 3 months

Micro dust filter Clean with a vacuum or brush. Once a month

Allergy filter Clean with a vacuum or brush. Every 6 months

Ionizer (Optional) Use dry cotton bud to remove any dust. Every 6 months

Indoor unit

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

Have a professional clean the condensate drain pan. Once a year

Have a professional clean the condensate drain pipe. Every 4 months

Replace the remote control batteries. Once a year

Outdoor unit

Have a professional clean the heat exchanger coils and

the panel vents. (Consult with technician.) Once a year

Have a professional clean the fan. Once a year

Have a professional clean the condensate drain pan. Once a year

Have a professional verify that all the fan assembly is

firmly tightened. Once a year

Clean the electric components with air. Once a year

NOTE

•Never use water that is higher 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.

•Do not wash the Micro dust filter with water, because the filter can be damaged (Optional).

•Do not wash the Triple filter with water, because the filter can be damaged (Optional).

•Do not wash the Allergy filter with water, because the filter can be damaged (Optional).

Clean the Air Filter

Clean the air filters once every 2 weeks, or

more, if necessary.

NOTE

•The air filter can be broken when it is bent.

•When the air filter is not assembled correctly,

dust and other substances can enter into the

indoor unit.

Type1

If you look at the indoor unit from above it, can

assemble the top filter easily.

1Turn off the power to the unit.

2Hold the knobs of the air filter, lift it up

slightly.

3Remove it from the indoor unit.

4Clean the filter with a vacuum cleaner or

with lukewarm water with neutral detergent.

5Dry the filter in the shade.

6Insert the hooks of the air filter into the front

cover.

7Push down hooks to assemble the air filter.

8Check the side of the front cover for correct

assembly of the air filter.

Type2

1Turn off the power to the unit.

2Open the front cover.

•Lift up both sides of the cover slightly.

3Hold the knobs of the air filters, pull them

down slightly and remove them from the

indoor unit.

4Clean the filters with a vacuum cleaner or

with lukewarm water with neutral detergent.

5Dry the filters in the shade.

6Insert the hooks of the air filters into the

front cover.

7Check the side of the front cover for correct

assembly of the air filters.

Clean the Micro Dust, Triple

and Allergy Filter (Optional)

1Turn off the power to the unit.

2Remove the air filters from the indoor unit.

3Remove the Micro dust, Triple and Allergy

filter from the indoor unit.

Type1

Type2

4Clean the filter with a vacuum cleaner.

5Insert the Micro dust, Triple and Allergy

filter.

Type1

Type2

6Assemble the air filters.

7Check the side of the front cover for correct

assembly of the air filters.

NOTE

•The feature and location of Micro dust, Triple

and Allergy filter may vary according to the

type of model.

TROUBLESHOOTING EN

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.

Symptoms Possible Causes & Solution

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.

•Turn off the air conditioner, switch OFF, or disconnect the power supply,

and contact the service center.

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

•Turn off the air conditioner, switch OFF, or disconnect the power supply,

and contact the service center.

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

properly.

•Turn off the air conditioner, switch OFF, or disconnect the power supply,

and contact the service center.

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

•Turn off the air conditioner, switch OFF, or disconnect the power supply,

and contact the service center.

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.

Symptoms Possible Causes & Solution

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.

Symptoms Possible Causes & Solution

The indoor unit is

still operating even

when the unit has

been turned off.

The Auto Clean function is being operated.

•Allow the Auto Clean function to continue since it removes any remaining

moisture inside the indoor unit. If you do not want this feature, you can

turn the unit off.

The air outlet on the

indoor unit is

discharging mist.

The cooled air from the air conditioner makes mist.

•When the room temperature decreases, this phenomenon will disappear.

Water leaks from the

outdoor unit.

In the heating operations, condensed water drops from the heat

exchanger.

•This symptom requires installing a drain hose under the base pan.

Contact the installer.

There is noise or

vibration.

A clicking sound can be heard when the unit starts or stops due to

movement of the reversing valve.

Creaking sound: The plastic parts of the indoor unit creak when they

shrink or expand due to sudden temperature changes.

Flowing or Blowing sound: This is the flow of refrigerant through the

air conditioner.

•These are normal symptoms. The noise will stop.

The indoor unit

gives off an odor.

Odors (such as cigarette smoke) may be absorbed into the indoor

unit and discharged with airflow.

•If the smell does not disappear, you need to wash the filter. If this does

not work, contact the service center to clean your heat exchanger.

The air conditioner

does not emit warm

air.

When Heating Mode starts, the vane is almost closed, and no air

comes out, even though the outdoor unit is operating.

•This symptom is normal. Please wait until the unit has generated enough

warm air to blow through the indoor unit.

The outdoor unit is in Defrosting Mode.

•In Heating Mode, ice/frost is built up on the coils when the outside

temperature falls. This function removes a layer of frost on the coil, and it

should finish in approximately 15 minutes.

Outside temperature is too low.

•The heating effect may not be sufficient.

Symptoms Possible Causes & Solution

Your home appliance

and smartphone is

not connected to the

Wi-Fi network.

The password for the Wi-Fi that you are trying to connect to is

incorrect.

•Find the Wi-Fi network connected to your smartphone and remove it,

then register your appliance on LG ThinQ.

Mobile data for your smartphone is turned on.

•Turn off the Mobile data of your smartphone and register the appliance

using the Wi-Fi network.

The wireless network name (SSID) is set incorrectly.

•The wireless network name (SSID) should be a combination of English

letters and numbers. (Do not use special characters.)

The router frequency is not 2.4 GHz.

•Only a 2.4 GHz router frequency is supported. Set the wireless router to

2.4 GHz and connect the appliance to the wireless router. To check the

router frequency, check with your Internet service provider or the router

manufacturer.

The distance between the appliance and the router is too far.

•If the distance between the appliance and the router is too far, the signal

may be weak and the connection may not be configured correctly. Move

the location of the router so that it is closer to the appliance.

NOTE

•Some functions may not be supported, depending on the model.

Memo

Table of Contents

LG I38TKF User Manual

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