LG B120AH User manual

IMPORTANT
Please read through this manual. It contains valuable
information about your air conditioner. This manual may
help save time and money by explaining proper product
maintenance and preventing improper use.
PRECAUTIONS
Pay close attention to precautions in order to prevent
potential hazards and damage from misuse or improper
installation. LG is not responsible for any damages caused
by misuse of the product.
LG Large Duct-Type
Air Conditioner
OWNER'S MANUAL
LG
Prior to installation, this air-conditioning
unit must be submitted for approval by the
utility service which provides electricity
(EN 61000-3 Norm.)
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

2Large Duct-Type Air Conditioner
Large Duct Type Air Conditioner Owner’s Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
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
it to prove date of purchase or for warranty issues.
READ THIS MANUAL
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.
PRECAUTION
•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
Operating Instructions...................8
Care and Maintenance.................17
Before you call for service ..........19

Owner's Manual 3
Safety Precautions
ENGLISH
Safety Precautions
To prevent the injury of the user or other people and property damage, the following instructions must be
followed.
■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.
■The meanings of the symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
■Installation
Do not use a defective or
underrated circuit breaker.
Use this appliance on a
dedicated circuit.
• There is risk of fire or electric
shock.
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
shock"
Install the panel and the
cover of control box securely.
• There is risk of fire or electric
shock.
Always intstall 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
shock.

4Large Duct-Type Air Conditioner
Safety Precautions
■Operation
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
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 injury.
Do not let the air conditioner run for a long
timewhenthehumidityisveryhighanda
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
shock.
Do not place anything on
the power cable.
• There is risk of fire or electric
shock.
Do not plug or unplug the
power supply plug during
operation.
• There is risk of fire or electric
shock.

Owner's Manual 5
Safety Precautions
ENGLISH
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
Do not place a heater or
other appliances near the
power cable.
• There is risk of fire and electric
shock.
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
prodcut.
• There is risk of fire or failure of
product.
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
fire.
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
failure.
When the product is soaked
(flooded or submerged), contact
an Authorized Service Center.
• There is risk of fire or eletric
shock.
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.
Gasolin

6Large Duct-Type Air Conditioner
Safety Precautions
■Operation
■Installation
Turn the main power off when
cleaning or maintaining the
product.
• There is risk of electric shock.
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 damage.
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 properly.
• A bad connection may cause
water leakage.
Keep level even when
installing the product.
• To avoid vibration or water
leakage.
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
neighbors.
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.
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.
9090˚90˚

ENGLISH
Owner's Manual 7
Safety Precautions
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
damage.
Do not insert hands or other objects
through the air inlet or outlet while the
prodcut is operated.
•There are sharp and moving parts
that could cause personal injury.
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
injury.
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
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.
Wax
Thinner

8Large Duct-Type Air Conditioner
Timer
Program
Hour
Cancel 2ndF
Week Holiday
Set/Clr
Min
RESET
PLASMA
AUTO
AUTO SWING
ZONE
1234
Operation unit
Humidify JET
SLo
AUTO
OPERATION FAN SPEED
Program set
SUB FUNCTION SET TEMP
Room Temp
HI
MED
LO
Heater
Defrost
Filter
Preheat
Out door
Time
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
2ndF
No Func
3
4
5
6
15
14
16
2
1
7
17
18
19
8
9
10
11
12
13
Operating Instructions
Operating Instructions
Name and Function of Remote Controller
1. Operation display
Displays the operation conditions.
2. On/Off Button
Operation starts when this button is pressed, and
stops when the button is pressed again.
3. Set Temperature Button
Used to set the temperature when the desired
temperature is obtained.
4. FAN Operation Button
Used to circulate room air without cooling or
heating.
5. Fan Speed Button
Used to set desired fan speed.
6. Operation Mode Selection Button
Used to select the operation mode.
•Auto Operation Mode.
•Cooling Operation Mode.
•Soft Dry Operation Mode.
•Heating Operation Mode.(except cooling model)
7. Timer Cancel Button
Used to cancel the timer.
8. Timer Set Button
Used to set the timer when the desired time is
obtained.
9. Week Button
Used to set a day of the week.
10. Program Button
Used to set the weekly timer.
11. Holiday Button
Used to set a holiday of the week.
12. Time Set Button
Used to set the time of the day and change the
time in the weekly timer Function.
13. Set and Clear Button
Used to set and clear the weekly timer.
14. Room Temperature Checking Button
Used to check the room temperature.
15. Auto Function Button
16. Reset Button
Used to set the current time and clear the setting
time.
17. Wireless Remote Controller Receiver
18. Oeration Indicator
19. 2nd Function Button
Remote Controller
❈ Display temperature can be different from actual room temperature if the remote controller is
installed at the place where sun-rays are falling directly or the place nearby heat source.

ENGLISH
Owner's Manual 9
Operating Instructions
SettheCurrentTimeandadayoftheWeek
1
Press the ' ' button.
Each time the button is pressed, the number is changed from 00 to 23.
You can set the number of the current hour.
2
Press the ' ' button.
Each time the button is pressed, the number is increased from 00 to 59.
You can set the number of the current minute.
3
Press ' ' button.
Each time the button is pressed, a day of the week is shifted from sunday to saturday.
You can set the day of the week.
4
Press the ' ' button.
If you want to reset the current time and a day of the week, click the Reset button.
Hour
Min
Week
RESET
AUTO SWING
HI
ZONE
Operation unit Program set
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
Time
AUTO SWING
HI
ZONE
Operation unit Program set
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
Time
AUTO SWING
HI
ZONE
Operation unit Program set
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
Time
AUTO SWING
HI
ZONE
Operation unit Program set
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Time
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
Hour
Min
Week
RESET

10 Large Duct-Type Air Conditioner
Week
Program
Set/Clr
MinHour
AUTO SWING
Time
HI
ZONE
Operation unit
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Timer
On
Set no.
Off
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
Program set
01 03 05 07 09 11 13 15 17 19 21 23
Time
AUTO SWING
Program set
Time
HI
ZONE
Operation unit
Room Temp
MED
LO
AUTO
JET
Heater
Defrost
Filter
Preheat
Humidify
Out door
Timer
On
Set no.
Off
1234
OPERATION FAN SPEED SUB FUNCTION SET TEMP
01 03 05 07 09 11 13 15 17 19 21 23
Time
Program
Operating Instructions
Weekly Programming
4
Press the Program button again to finish weekly programmining.
1
Press the Program button.
The remote controller is displayed like a picture. Then ' ', ' ' and '01' is blinked.
2
Press the ' ' button.
Press button repeatedly until desired mode appears.
For example, if you want Thu, press button 4 times.
3
Select the time you want.
Press or button, then blinking letter is shown.
If you press button, then ' ' shape appears.
' ' shape means that five o'clock is reserved.
Using below buttons, you can reserve time.
* For example, the air-conditioner is on 6,7,8 and 13~22 o'clock.
Program set
Week
Week
Week
MinHour
Set/Clr
unit
05