LG U9CV1C User manual

Read this owner’s manual thoroughly before operating the appliance and
keep it handy for reference at all times.
MFL71825202
OWNER’S MANUAL
Air Purier
Rev.01_110921 Copyright © 2021 LG Electronics Inc. All Rights Reserved
www.lg.com
U9C Series
EN ENGLISH

EN
Index
This manual may contain images or content different from the model you purchased. This
manual is subject to revision by the manufacturer.
SAFETY INSTRUCTIONS
Installation
10 Parts Instruction
12 Unpacking the Appliance
13 Installation Location Requirements
13 Transportation Requirements
Operation
14 Status Display
15 Control Panel
17 Getting Started
20 Using Extra Functions
Smart functions
24 LG ThinQ Application
27 Smart Diagnosis
Maintenance
28 Maintaining the Appliance
29 Cleaning the Appliance
29 Maintaining the Filter
Troubleshooting
32 Before Calling for Service
36 Appliance Specifications
WARRANTY (USA)

03
EN
SAFETY INSTRUCTIONS
READ AND SAVE THESE 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 text marked
with this symbol carefully and follow the instructions in
order to avoid risk.
WARNING
This indicates that failure to follow the instructions can
cause serious injury or death.
CAUTION
This indicates that failure to follow the instructions can
cause minor injury or damage to the product.
IMPORTANT SAFETY INSTRUCTIONS
WARNING
To reduce the risk of explosion, re, 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.

04
EN
Installation
•Do not install the appliance on an uneven or inclined surface.
•Do not install the appliance in an area exposed to direct
sunlight or near heat-generating equipment.
•Do not install the product in a place where combustible gas
may leak or industrial oil or metallic particulates are present.
•Do not allow the appliance to push against the power cord or
plug.
•Do not touch the power plug with wet hands.
•When unplugging the power cord, always pull it by the plug.
•Unplug the appliance during thunder or lightning storms or
when not in use for a long time.
•Do not bend the power cord excessively or place a heavy
object on top of it.
•Do not extend the length of the power cord or alter it.
•Do not use several devices on a multi-socket extension outlet.
•Make the connection securely so that screw in terminals will
not be loosened when the power cord is pulled.
•Make sure that the power cord cannot be be pulled out or
damaged during operation.
•If the power cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualied person in
order to avoid a hazard.
•This appliance has a polarized plug (one blade is wider than
the other). To reduce the risk of electric shock, this plug is
intended to t in a polarized outlet only one way. If the plug
does not t fully in the outlet, reverse the plug. If it still does
not t, contact a qualied electrician. Do not attempt to defeat
this safety feature.

05
EN
Operation
•If the appliance is immersed in water, stop using it and contact
an LG Electronics Customer Information Center.
•If there is a gas leakage (isobutane, propane, LNG, etc.), do
not touch the product or power plug and ventilate the area
immediately.
•Do not clean the appliance with brushes, cloths or sponges
which are abrasive or made of metal.
•If you detect any abnormal noise, odor or smoke, unplug the
product immediately and contact an LG Electronics Customer
Information Center.
•Only an authorized repair person should disassemble, repair,
or modify the appliance.
•Do not use or store re, combustibles (ether, benzene,
alcohol, drugs, propane, butane, combustible spray,
insecticide, air freshener, cosmetics, etc.) or ammable
materials (candles, lamps, etc.) near the product.
•Do not place the power cord under rugs, carpeting or mats.
•Do not allow animals or pets to chew on the power cord.
•Do not move the appliance when it is in operation.
•Do not hit the appliance.
•Do not insert hands or metal objects into the air inlet or outlet.
•Do not install and use broken parts.
•Do not put ammables into the appliance.
•Do not allow children to climb on or play with the appliance.
•Do not place anything on top of the appliance.

06
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•The fan is not a toy. It should not be played with or placed
where young children can reach it.
•Be careful that children do not get their hands caught in the
vanes by putting their hands during the vanes operation.
•This product uses UVnano LED. Do not disconnect or replace
the UVnano LED arbitrarily. LEDs must be replaced only by
LG-approved service providers.
•Harmful UVnano radiation may leak if the device is used in an
unintended way or if the wires are damaged. UVnano radiation,
even in very small amounts, can harm the eyes and skin.
•Be careful not to let any part of your body put on between the
vanes during the vane operation.
•Do not replace the UV Lamp while it is plugged in.
- Skin or eye damage may result from directly viewing the light
produced by the lamp in this apparatus. Always disconnect
power before relamping or servicing. Replace Lamp With
Lamp CUD7GF1B, Manufactured by Seoul Viosys Co.,
LTD.Replace Lamp With Lamp LTPL-G35U275GC-TWA,
Manufactured by Lite-On Technology Corporation.
Maintenance
•Dispose of the packing materials (vinyl, styrofoam, etc.) to
keep them out of reach of children.
•Take care not to injure or pinch yourself when you detach and
reattach parts of the appliance.
•Turn off and unplug the appliance before cleaning it or
replacing the lter.

07
EN
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 tilt the appliance to pull or push it when transporting.
•Do not install the appliance in a vehicle, RV, or marine vessel.
•Do not place the appliance near a TV or stereo equipment.
•Do not place the appliance under bright light.
•The appliance must be installed in accordance with national
wiring regulations.
•When moving or storing the appliance, wrap the power cord
around the base of the appliance to prevent personal injury,
damage to the cord or damage to oors.
•Do not place the appliance near curtains.

08
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Operation
•Do not use the product for removal of toxic gas such as
carbon monoxide.
•Do not use the product for ventilation purposes.
•Do not use the appliance for a long time in a region with
unstable voltage.
•Do not place obstacles around the air inlet or outlet.
•For safe use of the appliance, children or others with reduced
mental capabilities need to be closely monitored by a person
who is responsible for their safety.
•Do not use the product for special purposes such as
preserving plants, precision instruments, artworks, etc.
•Do not operate the appliance with wet hands.
•Do not let the moisture from a humidier directly touch the
appliance.
•Do not use the appliance while it is not in an upright position.
•Do not use the appliance near objects vulnerable to heat.
•Do not use detergents, cosmetics, chemicals, air fresheners,
or disinfectants in the appliance.
•Do not touch any internal parts while the unit is operating or
immediately after operation.
•Use the lter only for its intended purpose.
•The Deodorizing Care lter and True HEPA lter are
assembled together. Do not try to detach them from each
other.
•Do not insert any objects into the Air outlet.

09
EN
Maintenance
•Do not use strong detergents or solvents to clean the product.
Use a soft cloth to clean.
•Do not clean the appliance with an alkaline detergent.
•Do not wipe the appliance surface using sulfuric acid,
hydrochloric acid or organic solvents (thinner, kerosene etc.)
or attach a sticker on the appliance.
•Do not allow water inside the appliance.
•Do not wash the lter with water.
•Be careful not to damage the ultra-ne lter when cleaning it
with a vacuum cleaner.

EN
10
EN
Installation
•The appearance or functions of the appliance may differ depending on the model.
Parts Instruction
Front Rear
Controller
•Sets the product functions.
Vane
•Moves depending on the operating
mode(Wide / Direct / Diffusion).
Air Outlet
•It discharges puried air through the lter.
Display
(Status Display / Remote Control Receiver)
•Displays the settings of the product and the
air condition.
Filter
•Minimizes allergens, ne particulates,
possible sources of sick house syndrome,
smog, and other odors.
Smart Diagnosis
•If the product malfunctions, use Smart
Diagnosis to check the product status. (See
Smart Diagnosis in Smart Functions)
Sensor
•PM1.0 (particles with a diameter between
1.0 and 2.5 micrometers) Sensor: Detects
the concentration levels of dust.(You do not
need to clean the sensor lens separately.)
Product Center Line
•It is the center line of the product.
UVnano LED(Only models with UVnano applied)
•Remove the harmful bacteria at internal fan
of the air purier.
Remote Control Holder
•Attach the remote controller to store it.
Handle
•Use when carrying the product.
Temperature/Humidity Sensor
•Detects temperature and humidity.
Air Inlet (Cover)
•Air goes into the purier through the inlet.
•The front and rear covers may be removed
separately.
CAUTION
•Be careful not to stick magnets or metal objects to
the remote controller holder as it is attached with
magnets.
•Be careful that children do not get caught by
putting their hands during the Vane operation.

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Filter System
Ultra Fine Filter
Deodorizing Care lter
Minimizes odors from the bathroom,
cigarettes, food and other common
sources.
True HEPA lter
Minimizes PM1.0 and cigarette smoke
from the air.
Filter Handle
Use it to remove the lter from the
product.
Ultra Fine Filter
Minimizes large particles oating in
the air.
Note
•A slight odor may be emitted from the new lter at the beginning after purchase. The odor
will disappear after a day or so of using the product, so you can use it without worry.
•The frequency of cleaning and lter replacement may vary depending on environment and
usage time.
•Filters may be used for up to 1 year. The more polluted the indoor air, the shorter the life of
the lter.
•If an excessive odor is present in the room, rst ventilate the air to remove the odor, and
then use the air purier to remove the remaining odor.
•If the air purier is used after not having been used for a long time and there is an odor,
you can reduce the odor from the lter by operating it on fan speed 10 step in a ventilated
area.
•The lter may emit an odor when used continuously in a humid environment or where
moisture from a humidier is absorbed into the lter. If odor is generated due to moisture,
dry the lter in sunlight before use.
•Carbon monoxide (CO) is a harmful gas that is mainly introduced from the outside, and
cannot be removed with a lter.
•Keep the windows or doors closed while using the product. However, if you operate the
product for a long time in a closed space, the carbon dioxide concentration may rise. So
be sure to ventilate the indoor regularly.
•The deodorization function of the air purier operates by trapping the odor in the lter. If
you use the product for a long time in a room with excessive odor, the performance of the
lter may decrease signicantly.

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Accessories
Remote Control/Battery
(CR2025, 1 Unit)
Owner’s Manual / Quick Guide
Unpacking the Appliance
Remove the xing tape and protective vinyl,
packing material product and its lter before use.
Removing lter vinyl and
packing material
1Remove the product from the
packaging and remove the xing tape
attached to the product.
2Grab the cover and gently pull to
separate it from the appliances.
•The direction with the LG logo on
the product display is the front of the
product.
Display
Air inlet(cover)
3After separating the lter, remove its
protective vinyl.
•When removing the packaged lter,
separate it from the protective vinyl.
4Install the lter in the product.
•Make sure that the handle is facing
upward.
Handle
5Remove the packing material inserted
at the bottom of the product.
6Insert the tabs at the bottom of the
cover into the slots in the base of the
appliance and close the cover.

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CAUTION
•Be sure to remove the vinyl from the lter
before using the product.
•Pay attention to the direction of the lter
when installing the lter.
•Be sure to remove the cushioning material
before using the product.
Removing vane vinyl
Use the product after removing the vane
vinyl.
1. Operating product.
2. Press Mode button and select Diffusion
Mode.
3. After vanes come out, grasp the vinyl
at the top and remove it slowly in the
downward direction.
CAUTION
•If you do not remove the vane vinyl, be
aware that the vinyl may make noise while
operating the product.
Installation Location
Requirements
Install at a distance of at least 3 ¼ ft (1 m)
from a wall.
•If there is not enough space for air to be
taken in, performance of the air purier
may be reduced.
1 m
The performance of the product may differ
depending on the operating environment
(such as temperature and humidity).
•Product performance may be slightly
degraded when used outside of a humidity
range of 40% to 70%.
Transportation Requirements
Be careful not to drag the power cord on the
oor when moving or storing the product.
Transporting the Appliance
Carry the product safely by using the handles
at the top and back of the product.
CAUTION
•Do not move the product by holding the
outer cover. The cover may open and the
product may fall.

EN
14
EN
Add-on Display
•Up to three icons are displayed
•Icons are shown or displayed according to display priority.
–Button Lock > Timer > Filter Replacement Notication > UVnano > Wi-Fi
Connection
Icon Description Icon Description
Displays when the control panel
is locked.
Displayed when the sleep timer
is set.
Displays when it is time to
replace the lter.
Displays when connected to
Wi-Fi.
Displayed when the UVnano
setting is enabled.
Displayed when the UVnano is
not working normally.
(Check if the lter and air
intake cover are properly
installed.)
Status display
•Air quality, PM10/PM2.5/PM1.0 dust
concentration, temperature, humidity,
and operation status are displayed.
Fan Speed Display
•Displays Fan speed from Auto,
Steps 1 to 10 and Turbo.
Operation
•The appearance or accessories of the product may differ depending on the model.
Status Display
PM10
5
3
㎍/㎥

15
ENEN
Control Panel
Standby On/Off Button
Can start or stop operation.
Speed Button
Allows you to adjust the fan speed
of the product.
Mode Button
Use it to set the operation mode of
the product.
Auto Fan Button
Sets the product’s wind strength
automatically.
Rotation Button
Sets the rotation of the product.
Note
•You can use extra functions by pressing the button on the control panel for longer than 3 seconds.
(Example : Press the Mode button and the Auto Fan button at the same time for 3 seconds
or longer.)
Long press
(more than 3 seconds)
Function
Long press
(more than 3 seconds)
Function
Control Panel Lock/Unlock UVnano On/Off
Connect Wi-Fi Smart Diagnosis
Product sound On/Off Filter Replacement
Notication Reset
•Press and hold the button
Press and hold
the button
Function
Press and hold
the button
Function
Continuous change of Fan speed Continuous change of standby screen
Continuous change of Fan speed

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Remote Controller
s
Standby On/Off button
Can start or stop operation.
Speed button
Allows you to adjust the fan speed of
the product.
Mode button
Sets the operation mode.
Show Info button
Use to set the standby screen.
Turbo button
Sets fan speed to Turbo.
Auto Fan button
Sets the fan speed automatically.
Rotation button
Sets the rotation of the product.
Sleep Timer button
Sets the sleep schedule.
Note
•You can use extra functions by pressing
the buttons on the remote controller for
longer than 2 seconds.
Long press (more
than 2 seconds)
Function
Continuous change of Fan speed
Continuous change of Fan speed
Product sound On/Off
Setting Display brightness
Preparing to Use the Remote
Controller
1With the front side of the remote
controller facing up, remove the battery
tray by pushing in the direction of
number 2 while pressing part 1 with a
simple tool (cotton swab, etc.).
①
②
②
①
2Insert the battery provided with the
appliance into the tray. Place it with the
+ mark facing up.
3Insert the battery tray back into the
remote controller.

17
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•The remote controller signal reception may
be interrupted when strong lights such as
uorescent lamps or neon signs are present.
In this case, use the remote controller in
front of the remote signal receiver of the
indoor unit.
Getting Started
Press the Standby On/Off button to start
operation.
Note
•When starting operation for the rst time
after installing the product, it will operate in
Wide mode and with step 5 of fan speed.
•If you stop operation and resume it, it
will start cleaning with the mode you last
selected.
•Even if power is lost due to a blackout, the
product will remember the mode(Fan speed,
Mode, Display brightness) you used last.
•When you start driving, the dust
concentration is displayed after sensor
stabilization (about 15 seconds). While
sensor stabilization is in progress, the clean
stabilization screen ( ) appears on the
status display.
WARNING
•The remote controller uses button/coin type
batteries (CR2025).
•Swallowing batteries may cause serious
injury or death. Go to hospital emergency
room immediately to seek medical attention.
•Keep the battery out of reach of children.
•If the battery tray is not secured rmly, stop
using the appliance immediately and keep it
away from children.
CAUTION
•Do not arbitrarily modify the battery.
•Do not recharge or disassemble the battery.
•Do not throw the battery into a re for
disposal or leave it near heat.
•Do not press multiple buttons at the same
time.
•Do not use it in a place with a lot of water or
moisture.
•Do not use it in a place with ames or heat.
•Remove and store the battery in a safe
location if you do not intend to use the
remote controller for a long time.
Note
•If the remote controller is not operating
properly, check the polarity (+, -) of the
battery or replace the battery before
contacting the service center.
•When using the remote controller, point the
remote controller transmitter toward the
receiver on the product.
•The remote controller is not received
properly at a distance of more than 7 m from
the product.

18
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Using the Mode
Sets the operation mode of the air purier.
•Each time the Mode button is pressed
during operation, the sequence of Wide
Mode – Direct Mode – Diffusion Mode is
repeated.
Note
•Wide Mode - In operation mode, you can
feel cool and comfortable with clean wind
discharged to the front.
•Direct mode - As the vane closes slightly, the
air is intensively discharged.
•Diffusion Mode - Operation mode in which the
vane changes the direction of the wind to clean
the indoor space in various directions and to
use it without being cold even in winter.
Adjusting the Fan Speed
Adjusts the fan speed of the purier.
•Each time the Speed button is pressed
during operation, it changes in the order of
steps 1 to 10.
•Press and hold the Speed button to
change the fan speed in a row.
Note
•The stronger the wind, the faster the
space is cleaned.
Using Turbo
Sets the fan speed to Turbo.
Note
•After running on Turbo, if you turn "Turbo"
off before 30 minutes, it will switch to the
previous fan speed.
•After 30 minutes of turbo operation, the
fan speed automatically changes to Auto
Fan.
Using Auto Fan
Sets the air purier’s fan speed automatically.
Note
•When set to Auto Fan, the indoor ne dust
concentration, appropriate Fan speed are
set automatically.

19
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Using Rotation
Sets the rotation of the air purier.
•Each time the Rotation button is pressed
during operation, the sequence of 45°-60°
-90°-140°-Stop is repeated.
Note
•It rotates at 140° during the initial rotation
and starts rotating from the center of the
product after position initialization.
•When the Rotation button is pressed
while the product is rotating, it will set to
‘Stop’.
•When the function is changed while using
the rotation, the rotation stops for a while
so that the display status can be checked,
and then the rotation operates again after
the setting is completed.
•When using rotation mode: When the
product is turned off, the product rotates
to the center and stops.
•When the rotation mode is not in use:
When the product is turned off, the
product turns off at a stationary position.
•Product rotation rotates around the center
of the product.
•Do not forcefully rotate the product by
holding it.
•If you hold the product and force it to
rotate, you will need to re-center the
product.
•To center the product, turn off the product,
unplug the power cord, wait for a while,
and then plug in the power cord again.
After that, if you turn on the rotation, the
initialization proceeds automatically.

20
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Using Extra Functions
Setting standby display
Displays air quality, air quality circulation, temperature,
humidity and operation information.
•Press and hold the Auto Fan button in the control panel.
•Press the show Show Info button on the remote
controller.
•The order of Air Quality – PM10 – PM2.5 – PM1.0 –
Temperature – Humidity - Operating status is repeated.
Air Quality PM10 PM2.5 PM1.0
• Displays the overall air
quality status.
• Displays ne dust
information.
• Displays Ultra-ne dust
information.
• Displays Super ultra-
ne dust information.
Air Quality
Poor
Turbo
PM10
235
3
㎍/㎥
PM2.5
38
3
㎍/㎥
PM1.0
98
3
㎍/㎥
Temperature Humidity Mode status
•
Displays room
temperature information.
• Displays indoor humidity
information.
• Displays operation status
information.
Temperature
77°
3
Humidity
40%
33
33
Note
•Overall Air quality is calculated based on the concentrations of dust is categorized into 4 levels:
green, yellow, orange, and red, depending on the contamination of the air.
Color Overall Air Quality Concentration of PM (μg/m3)
State PM10 PM2.5 PM1.0
Red Poor 255 or more 56 or more 56 or more
Orange Unhealthy 155 ~ 254 36 ~ 55 36 ~ 55
Yellow Moderate 55 ~ 154 13 ~ 35 13 ~ 35
Green Good 54 or less 12 or less 12 or less
•Overall air quality can be seen by the color of the air quality indicator and the text
indicating the concentration of dust.
•The color of overall air quality is determined based on the concentration of dust.