PDF User Manual

  1. Home
  2. Manuals
  3. LG ARNU073BHA2 Owner's Manual

LG ARNU073BHA2 Owner's Manual

Made by: LG
Type: Owner's Manual
Category: Air Conditioner
Pages: 15
Size: 2.12 MB


Download PDF User Manual

Full Text Searchable PDF User Manual

background image


Indoor Unit (2 Series)


• Please read this owner's manual carefully and thoroughly 

before installing and operating your room air conditioner. 

• Please retain this owner's manual for future reference after 

reading it  thoroughly.

Type: Ceiling Concealed Duct- High Static





background image


Indoor Unit

Ceiling Concealed Duct – High Static Type Indoor Unit Owner’s Manual



Write the model and serial numbers here:

Model #

Serial #

You can find them on a label on the side of each unit.

Dealer's Name

Date Purchased

Staple your receipt to this page in the event you need
to prove date of purchase or to issue warranty.


Inside you will find many helpful hints on how to use
and maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.

You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of

Troubleshooting Tips

first, you may not need to call

for service at all.


Contact the authorized service technician for repair or
maintenance of this unit.

• Contact the installer for installation of this unit.

• The air conditioner is not intended for use by young

children or invalids without supervision.

• Young children should be supervised to ensure that

they do not play with the air conditioner.

• When the power cord is to be replaced, replacement

work shall be performed by authorized personnel only
using only genuine replacement parts.

• Installation work must be performed in accordance with

the National Electric Code by qualified and authorized
personnel only.

Safety Precautions.................3

Prior to Operation ..................8

Operating Instructions...........9

Name and Function of Remote
Controller ..............................9

Maintenance and Service ....11

Before you Call for 


background image

Safety Precautions  

Owner’s Manual 


To prevent injury to the user or other people and property damage, the following instructions must be

Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified
by the following indications.



This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.



Do not use a defective or
underrated circuit breaker.
Use this appliance on a
dedicated circuit.

• There is risk of fire or electric


For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.

• Do not disassemble or repair

the product. There is risk of fire
or electric shock.

Always ground the product.

• There is risk of fire or electric


Install the panel and the
cover of control box

• There is risk of fire or electric


Always install a dedicated
circuit and breaker.

• Improper wiring or installation

may cause fire or electric shock

Use the correctly rated
breaker or fuse.

• There is risk of fire or electric



Safety Precautions


background image

Safety Precautions   


Indoor Unit


Do not modify or extend the
power cable.

• There is risk of fire or electric


Do not install, remove, or
re-install the unit by
yourself (customer).

• There is risk of fire, electric

shock, explosion, or injury.

Be cautious when
unpacking and installing
the product.

• Sharp edges could cause injury.

Be especially careful of the
case edges and the fins on the
condenser and evaporator.

For installation, always contact the
dealer or an Authorized Service Center.

• There is risk of fire, electric

shock, explosion, or injury.

Do not install the product on
a defective installation stand.

• It may cause injury, accident, or

damage to the product.

Be sure the installation area
does not deteriorate with age.

• If the base collapses, the air

conditioner could fall with it,
causing property damage,
product failure, and personal

Do not plug or unplug the
power supply plug during

• There is risk of fire or electric


Do not touch(operate) the
product with wet hands.

• There is risk of fire or electrical


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

• There is risk of fire and electric


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

• Moisture may condense and

wet or damage furniture.

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

• There is risk of fire or electric


Do not place anything on
the power cable.

• There is risk of fire or electric



background image

Do not allow water to run
into electric parts.

• It may cause  There is risk of

fire, failure of the product, or
electric shock.

Do not store or use flammable
gas or combustibles near the

• There is risk of fire or failure of


Do not use the product in a
tightly closed space for a
long time.

• Oxygen deficiency could occur.

When flammable gas leaks,
turn off the gas and open a
window for ventilation
before turn the product on.

• Do not use the telephone or

turn switches on or off. 
There is risk of explosion or fire

If strange sounds, or small or

smoke comes from product. Turn
the breaker off or disconnect the
power supply cable.

• There is risk of electric shock or


Stop operation and close the window
in storm or hurricane. If possible,
remove the product from the window
before the hurricane arrives.

• There is risk of property

damage, failure of product, or
electric shock.

Do not open the inlet grill of the
product during operation.
(Do not touch the electrostatic
filter, if the unit is so equipped.)

• There is risk of physical injury,

electric shock, or product

When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.

• There is risk of fire or electric


Be cautious that water
could not enter the product.

• There is risk of fire, electric

shock, or product damage.


Ventilate the product from time to time
when operating it together with a stove, etc.

• There is risk of fire or electric shock.

Turn the main power off when cleaning or
maintaining the product.

• There is risk of electric shock.

Safety Precautions  

Owner’s Manual 




background image

Safety Precautions   


Indoor Unit




Always check for gas
(refrigerant) leakage after
installation or repair of product.

• Low refrigerant levels may

cause failure of product.

Install the drain hose to ensure
that water is drained away

• A bad connection may cause

water leakage.

Keep level even when
installing the product. 

• To avoid vibration or water


Do not install the product where the
noise or hot air from the outdoor unit
could damage the neighborhoods.

• It may cause a problem for your


Use two or more people to lift
and transport the product. 

• Avoid personal injury.

Do not install the product
where it will be exposed to
sea wind (salt spray) directly.

• It may cause corrosion on the product.

Corrosion, particularly on the condenser
and evaporator fins, could cause product
malfunction or inefficient operation.


When the product is not be used for a long
time, disconnect the power supply plug or
turn off the breaker.

• There is risk of product damage or failure, or

unintended operation.

Take care to ensure that nobody could step
on or fall onto the outdoor unit.

• This could result in personal injury and product


Do not expose the skin directly to cool air
for long periods of time. 
(Don't sit in the draft.)

• This could harm 

to your health.

Do not use the product for special purposes, such as
preserving foods, works of art, etc. It is a consumer
air conditioner, not a precision refrigeration system.

• There is risk of 

damage or 
loss of property.


background image

Do not recharge or
disassemble the batteries.
Do not dispose of batteries
in a fire.

• They may burn or explode.

If the liquid from the batteries gets
onto your skin or clothes, wash it
well with clean water. Do not use the
remote if the batteries have leaked.

• The chemicals in batteries could

cause burns or other health hazards.

If you eat the liquid from the
batteries, brush your teeth and see
doctor. Do not use the remote if the
batteries have leaked.

• The chemicals in batteries could cause

burns or other health hazards.

Safety Precautions  

Owner’s Manual 


Do not block the inlet or
outlet of air flow.

• It may cause product failure.

Use a soft cloth to clean. Do
not use harsh detergents,
solvents, etc.

• There is risk of fire, electric

shock, or damage to the plastic
parts of the product.

Do not touch the metal parts of
the product when removing the
air filter. They are very sharp!

• There is risk of personal injury.




Do not step on or put
anyting on the product.
(outdoor units)

• There is risk of personal injury

and failure of product.

Always insert the filter
securely. Clean the filter
every two weeks or more
often if necessary.

• A dirty filter reduces the efficiency

of the air conditioner and could
cause product malfunction or

Do not insert hands or other
objects through the air inlet
or outlet while the product
is operated.

• There are sharp and moving

parts that could cause personal

Do not drink the water
drained from the product.

• It is not sanitary and could

cause serious health issues.

Use a firm stool or ladder
when cleaning or
maintaining the product.

• Be careful and avoid personal


Replace the all batteries in the
remote control with new ones
of the same type. Do not mix
old and new batteries or
different types of batteries.

• There is risk of fire or explosion



background image

Prior to operation 


Indoor Unit

Prior to Operation

1. Contact an installation specialist for installation.

2. Use a dedicated circuit.

1. Being exposed to direct airflow for an extended period of time could be hazardous to your health.

Do not expose occupants, pets, or plants to direct airflow for extended periods of time.

2. Due to the possibility of oxygen deficiency, ventilate the room when used together with stoves or

other heating devices.

3. Do not use this air conditioner for non-specified special purposes (e.g. preserving precision

devices, food, pets, plants, and art objects). Such usage could damage the items.

1. Do not touch the metal parts of the unit when removing the filter. Injuries can occur when handling

sharp metal edges.

2. Do not use water to clean inside the air conditioner. Exposure to water can destroy the insulation,

leading to possible electric shock.

3. When cleaning the unit, first make sure that the power and breaker are turned off. The fan rotates

at a very high speed during operation. There is a possibility of injury if the unit’s power is
accidentally triggered on while cleaning inner parts of the unit.

For repair and maintenance, contact your authorized service dealer.

Preparing for operation


Cleaning and maintenance



background image


Operating Instructions

Owner’s Manual 

















• Wired remote controller:  

Operating Instructions

Name and function of wired remote controller(Optional)

Operating Instructions

1. Operation indication screen

2. Set temperature button

3. Wireless remote controller Receiver

• Some kind of product could not receive

wireless signal.

4. Ventilation button

5. Operation mode selection button

6. Sub-function button

7. Function setting button

8. Exit button

9. On/ Off button

10. Room temperature button

11. Fan speed button

12. Air flow button

13. Reservation/ Time setting button

14. Setting/ Cancel button

15. Up, Down, Left, Right


background image

Operating Instructions


Indoor Unit

Name and function of wired remote controller(Optional)

Cooling Mode

Auto Mode or Auto Changeover

Dehumidification mode

Heating Mode

Fan Mode 

• Cooling Model(  ), Heat Pump Model(  )

Operation Mode

PQWRCDF0 (Heat pump)
PQWRHDF0 (Cooling only)
















1.  Plasma button (optional)

Used to start or stop the plasma-purification

2.  Jet cool button

Speed cooling operates super high fan speed.

3.  Operation mode selection button

Used to select the operation mode.

4.  Function setting button

Used to set or clear auto clean or smart clean.

5.  LCD luminosity button (optional)

Used to adjust LCD luminosity

6.  Smart clean button (optional)

Used to start or stop smart clean.

7.  Clear all button

Used to clear all timer.

8.  Room temperature setting button

Used to select the room temperature.

9.  ON/OFF button

Used to turn off/on the unit.

10. Indoor fan speed selection button

Used to select fan speed in four steps low,
medium, high and chaos.

11. Auto swing button

Used to stop or start louver movement and set the
desired up/down airflow direction.

12. Horizontal airflow direction control button


Used to set the desired horizontal airflow direction.

13. Timer and time setting button

Used to set the time of starting or stopping and
sleeping operation.

14. Room temperature checking button

Used to check the room temperature.

15. ˚C/˚F switch button

Used to switch temperature reading from Celsius to

16. Reset button

Used to reset the remote controller.


background image

Maintenance and Service

Owner’s Manual 



Grille, Case, and Remote Controller

Turn the system off before cleaning. To clean, wipe with
a soft, dry cloth. Do not use bleach or abrasives.

Power supply must be disconnected before
cleaning the indoor unit.


1. Remove the Air filters.


Take hold of the tab and pull slightly forward
to remove the filter.


When the air filter is

to be removed, do not touch the
metal parts of the indoor unit. 
It may cause an injury.

2. Clean dirt from the air filter using a vacuum

cleaner or washing with water.


If dirt is conspicuous, wash with a neutral
detergent in lukewarm water.


If hot water (50°C or more) is used, it may
be deformed.

3. After washing with water, dry well in

the shade.


Do not expose the air filter to direct
sunlight or heat from a fire when drying it.

4. Install the air filter.

Air Filters

The air filters behind the front grille should be checked and
cleaned once every 2 weeks or more often if neccessary.


Before performing any maintenance, turn off the main power to

the system.


Never use any of the followings:


Water hotter than 40°C.
Could cause deformation 
and/or discoloration.


Volatile substances.
Could damage the 
surfaces of the air 

Air outlet vent

Air filters

B enzene





Maintenance and Service


background image

Maintenance and Service


Indoor Unit



When the air conditioner is not going to be used for a long time.

Operation Tips

Helpful information

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

When it is not going to be used for 
a long time.

When the air conditioner is used again.

Operate the air conditioner at the
following settings for 2 to 3 hours.

• Type of operation: Fan operation mode.
• This will dry out the internal mechanisms.

Turn off the breaker.

Turn off the breaker when the air conditioner
is not going to be used for a long time.

Dirt may collect and may cause a fire.

Clean the air filter and install it in the
indoor unit.

(Refer to page 12 for cleaning it.)

Check that the air inlet and outlet of the
indoor/outdoor unit are not blocked.

Check that the ground wire is
connected correctly. It may be
connected to the indoor unit side.

Do not overcool the room.

This is not good for the health
and wastes electricity.

Keep blinds or curtains


Do not let direct sunshine
enter the room when the air
conditioner is in operation.

Keep the room temperature


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

Make sure that the doors 

and windows are shut tight.

Avoid opening doors and
windows as much as possible
to keep the cool air in the

Clean the air filter regularly.

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

Ventilate the room


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


background image

Maintenance and Service

Owner’s Manual 



Before you call for service...


Check the following points before requesting repairs or service.... If the malfunction persists,
please contact your dealer.

Troubleshooting Tips! Save time and money!

• Have you made a

mistake in timer

• Has the fuse blown

or has the circuit
breaker been

• Check that this is not

a damp smell exuded
by the walls, carpet,
furniture or cloth
items in the room.

• Condensation occurs

when the airflow from
the air conditioner
cools the warm room

• This is the protector

of the mechanism.

• Wait about three

minutes and
operation will begin.

The air conditioner

does not operate.

The room has a

peculiar odor. 

It seems that

condensation is

leaking from the air


Air conditioner does

not operate for about

3 minutes when


Does not cool or heat


The air conditioner

operation is noisy.

Crack sound is


Remote control

display is faint, or no

display at all.

• Is the air filter dirty?

See air filter cleaning

• The room may have

been very hot when
the room air
conditioner was first
turned on. Allow time
for it to cool down.

• Has the temperature

been set incorrectly?

• Are the indoor unit's

air inlet or outlet vents

• For a noise that

sounds like water

-This is the sound of

freon flowing inside
the air conditioner

• For a noise that

sounds like the
compressed air
releasing into

-This is the sound of

the dehumidifying
water being
processed inside the
air conditioning unit.

• This sound is generated

by the expansion/
constriction of the front
panel, etc. due to
changes of

• Cleaning the filter,

press the Timer button

button of wired

remote controller at
the same time for 3

• Are the batteries


• Are the batteries

inserted in the
opposite (+) and (-)

WATER RESISTANT: The outdoor side of this appliance is WATER RESISTANT.

The indoor side is not water resistant and should not be exposed to
excess water.


Filter sign lamp

(LED) is ON.


background image



Indoor Unit


background image

P/No.: MFL42803016

Printed in Korea

After reading this manual, keep it in a place easily accessible to the user for future reference.