LG AMNH18GB2A1 Owner’s Manual

www.lg.com

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

TYPE : MULTI

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

OWNER’S MANUAL

AIR
CONDITIONER

P/NO : 5401403602 Rev.:

2 Multi Type Air Conditioner

Multi Type Air Conditioner Ownerʼs 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

n 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...................6

Care and maintenance.................35

Before you call for service... .......37

Owner's Manual 3

Safety Precautions

Safety Precautions

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

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

Be sure not to do.

Be sure to follow the instruction.

n 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 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
shock.

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.

n Operation

4 Multi Type Air Conditioner

Safety Precautions

Do not plug or unplug the
power supply plug during
operation.

• There is risk of fire or electric
shock.

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 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
shock.

Do not place anything on
the power cable.

• There is risk of fire or 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
product.

• 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 electric
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.

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.

Owner's Manual 5

Safety Precautions

n Installation

n Operation

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 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 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.

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 product 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.

6 Multi Type Air Conditioner

Operating Instructions

Operating Instructions

Wired 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.

❈ The actual product can be different from above contents depending upon model type.
❈ When using simultaneous operation system, whenever press remote controller button, system will approximately

operate after 1~2 minutes.

OPERATION INDICATION
SCREEN

SET TEMPERATURE BUTTON
FAN SPEED BUTTON
ON/OFF BUTTON
OPRATION MODE SELECTION

BUTTON
WIRELESS REMOTE

CONTROLLER RECEIVER

• Some products don't receive the
wireless signals.

AIR FLOW BUTTON
SUBFUNCTION BUTTON
FUNCTION SETTING BUTTON
VENTILATION BUTTON
RESERVATION
UP,DOWN,LEFT,RIGHT BUTTON

• To check the indoor temperature,
press button.

ROOM TEMPERATURE BUTTON
SETTING/CANCEL BUTTON
EXIT BUTTON

1

4

5

7

11

10

9
8

2
3

6

13

12

Please attach the inform label inside of the door.
Please choose proper language depend on your
country.

14
15

1

2
3
4
5

6

7
8

9
10
11
12

13
14
15

❊ Some functions may not be operated and displayed depending on the product type.

NOTE

Owner's Manual 7

Operating Instructions

Standard Operation - Standard Cooling

❈ Setting Temp Range : 18˚C~30˚C (64˚F~86˚F)

It cools the room by comfortable and clean wind.

Press button to turn on the

1

indoor.

Press button to select

2

Cooling operation mode.

Adjust the desired temperature

3

by pressing buttons.
Press button to check the
Room temperature.
When setting the desired
temperature higher than room
temperature, only ventilation
wind is blow out instead of
cooling wind.

8 Multi Type Air Conditioner

Operating Instructions

Standard Operation - Power Cooling

It makes the room cool using pleasant and fresh air quickly

It supplies warm wind to the indoor

Standard Operation - Heating Mode

What is Power Cooling?

• Desired temperature: Po (actually 18°C)

• Wind flow: power wind

• Wind direction: fix to air-cooling position

❈

Partial product has no power air-cooling function.

•

Heating drive only operates at the cooling and heating model.

•

Heating doesn't operate at cooling exclusive model.

It make room temperature
drop fast by running

}

Press button to trun on the

1

indoor.

Press button to select

2

cooling operation mode.

Press button continuously

3

until 'Po' displayed.

Press button to turn on the

1

indoor.

Press button to select

2

Heating mode.
(To check the indoor temperature,
press the room temperature button.)

Adjust the desired temperature

3

by pressing buttons.

When setting the desired
temperature lower than room
temperature, there is only
ventilation wind.

Owner's Manual 9

Operating Instructions

It removes humidity while air-cooling weakly.

•

In rainy season or high humidity climate, it is possible to operate simultaneously dehumidifier and
cooling mode to remove humidity effectively.

•

The menu item of wind powerfulness might not be partially selected according to the product.

Auto Changeover Mode

❖ Setting Temp Range : 18˚C~30˚C.

Standard Operation - Dehumidification Mode

Press button to turn on the

1

indoor.

Press button to select

2

Dehumidification mode.
The temperature setting can not be
adjusted during operation this mode.

Press the button to select

3

airflow rate feeble → weak →
medium → strong → automatic.
(The initial wind powerfulness of
humidity removal drive is 'weak'.)

Press button to turn on the indoor.

1

Press button to select Auto Changeover Mode.

2

The setting temperature as the right side picture can be set in both

3

cooling/ heating model.

10 Multi Type Air Conditioner

Operating Instructions

Press button to turn on the
indoor.

1

Press button to select Fan
Mode.

2

Every time pressing button, you
can select wind flow in order of
feeble → weak → medium → strong
→ automatic.
When running ventilation,
compressor of AHU doesn't work.

3

Standard Operation - Fan Mode

It blows the air as it is in the indoor, not the cold wind.

• Ventilation drive does not release cool wind but general fan

• Because it releases the wind that has no temperature difference from the room, it functions to

circulate the inside air.

• The menu item of wind powerfulness might not be partially selected according to the product.

Owner's Manual 11

Operating Instructions

Press button to turn on the
indoor.

1

Press button to select
Artificial intelligence Mode.

2

You can adjust
the temperature
as the picture on
the right for
cooling and
heating model.

3

For the case of
cooling exclusive,
as the picture on
the right, you can
adjust the
temperature from
hot to cold, from
"-2" to "2" based
on "00".

4

When cold
When cool
When appropriate
When warm
When hot

Standard Operation - Auto Operation Mode

During operating Auto Operation mode:

• We can use the FAN SPEED button

• We can change manually to other operation mode.

12 Multi Type Air Conditioner

Operating Instructions

Standard Operation - Airflow Setting

Wind powerfulness : You can simply adjust
desired wind powerfulness.

Please setup desired wind

1

powerfulness by wind powerfulness
button.

• Every time you press wind
powerfulness, you can select the wind flow in
order of ‘feeble → weak → weak medium →
medium → medium strong → strong → power
→ automatic’.

• The menu item might not be partially
selected according to product function.

• Please refer to product manual for product’s
detailed function.

Wind direction : You can simply adjust desired
wind direction.

Please set desired wind direction

1

by pressing button.
You can select wind direction of
(comfortable wind → Up/Down and
Right/Left → Right/Left →
Up/Down) by pressing button.
Partial item of wind directions might not be
selected according to product function.
Please refer to product manual for product’s
detailed function.