LG AMNQ12GTRA1 Owner’s Manual

OWNER’S MANUAL

AIR
CONDITIONER

ENGLISH

Please read this manual carefully before operating your set and retain it for future
reference. Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
This equipment shall be provided with a supply conductor complying with the national
regulation.

CEILING CASSETTE

[Manufacturer]

MFL42763413

Rev.02_010821

LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro,
Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA

www.lg.com

Copyright © 2013 - 2021 LG Electronics Inc. All Rights Reserved.

ENGLISH

2

TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:

TIPS FOR SAVING ENERGY

• Do not cool excessively indoors. 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, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air con­ditioner is used for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block
the air flow or weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:

Model number :

Serial number :

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

Dealer’s name :

Date of purchase :

SAFETY INSTRUCTIONS

The following symbols are displayed on indoor and outdoor units.

SAFETY INSTRUCTIONS

3

ENGLISH

Read the precautions in this manual
carefully before operating the unit.

This symbol indicates that the
Operation Manual should be read
carefully.

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.

WARNING

!

• Installation or repairs made by unqualified persons can result in hazards to you and others.

• The product shall be installed according to the Wiring regulations of the corresponding country.

• The information contained in the manual is intended for use by a qualified service technician familiar
with safety procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunc­tion, property damage, personal injury and/or death.

• 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.

This appliance is filled with
flammable refrigerant.(for R32)

This symbol indicates that a service
personnel should be handling this
equipment with reference to the
Installation Manual.

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.

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4

• Be cautious when unpacking and installing the product. Sharp edges could cause injury. Be espe-

• For installation, always contact the dealer or an Authorized Service Center. There is risk of fire, elec-

• Do not install the product on a defective installation stand. It may cause injury, accident, or damage

• Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner

• Do not let the air conditioner run for a long time when the humidity is very high and a door or a win-

• Do not install the product on a defective installation stand. It may cause injury, accident, or damage

• Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box

• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress

• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room

• Ducts connected to an appliance shall not contain an ignition source. (for R32)

• The appliance shall be stored in a room without continuously operating ignition sources (for example:

• Keep any required ventilation openings clear of obstruction.

Operation

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

• 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.

• 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

• Do not allow water to run into electric parts. It may cause There is risk of fire, failure of the product,

• Do not store or use flammable gas or combustibles near the product. 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 prod-

• If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect the

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

• Do not open the inlet grill of the product during operation.(Do not touch the electrostatic filter, if the

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

• Be cautious that water could not enter the product. There is risk of fire, electric shock, or product

• Ventilate the product from time to time when operating it together with a stove, etc. There is risk of

• 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

SAFETY INSTRUCTIONS

cially careful of the case edges and the fins on the condenser and evaporator.

tric shock, explosion, or injury.

to the product.

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

dow is left open. Moisture may condense and wet or damage furniture.

to the product.

cover are removed or opened. Otherwise, it may cause fire, electric shock, explosion or death.

air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion. There is
the risk of death, injury, fire or explosion.

area as specified for operation. (for R32)

open flames, an operating gas appliance or an operating electric heater.)

risk of fire or electric shock.

shock.

or electric shock.

product.

uct on. Do not use the telephone or turn switches on or off. There is risk of explosion or fire

power supply cable. There is risk of electric shock or fire.

window before the hurricane arrives. There is risk of property damage, failure of product, or electric
shock.

unit is so equipped.) There is risk of physical injury, electric shock, or product failure.

risk of fire or electric shock.

damage.

fire or electric shock.

breaker. There is risk of product damage or failure, or unintended operation.

SAFETY INSTRUCTIONS

• Take care to ensure that nobody could step on or fall onto the outdoor unit. This could result in per­sonal injury and product damage.

CAUTION

!

5

Installation

• 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 install the unit in potentially explosive atmospheres.
If anyone other than a licensed Professional installs, repairs, or alters LG Electronics Air Condi-

•
tioning Products, the warranty is voided.

- All costs associated with repair are then the full responsibility of the owner.

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.

• 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 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.

• 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.

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TABLE OF CONTENTS

TABLE OF CONTENTS

2 TIPS FOR SAVING

ENERGY

3 SAFETY INSTRUCTIONS
7 BEFORE USE

7 Preparing for operation

7 Usage

7 Cleaning and maintenance

7 Service

8 PRODUCT

INTRODUCTION

8 Name and function of parts

9 Forced Operation

9 Operating Method

10 Operation Indication Lamps

10 Auto Restart Function

11 Wireless Remote Controller

13 OPERATING

INSTRUCTION

13 How to insert the Batteries

13 Wireless Remote Controller Mainte-

nance

14 INSTALLATION

INSTRUCTIONS

14 Installer Setting - How to enter installer

setting mode

15 Installer Setting - Installer Setting

Code Table

16 Installer Setting - Setting Address of

Central Control

16 Installer Setting - Checking Address of

Central Control

17 OWNER'S INSTRUC-

TION

17 Cooling Mode

17 Power Cooling Mode

18 Auto Operation Mode

19 Dehumidification Mode

19 Fan Mode

20 Temperature Setting/Room Tempera-

ture checking

21 Airflow Setting

22 Air Purification / Plasma Purification

(Optional)

22 Checking the Air Condition during Air

Purification Operation

22 Celsius/Fahrenheit Switching

23 Cleaning the deodorization

filter/PM1.0 filter (Optional) - 4WAY

25 Cleaning the PM1.0 Sensor - 4WAY

26 How to set Air quality level color

26 Individual vane angle control

27 Timer

28 MAINTENANCE AND

SERVICE

28 Indoor Unit

29 Operation Tips!

29 When the air conditioner is not

going....

30 Troubleshooting Tips! Save time and

money!

31 Call the service immediately in the fol-

lowing situations

BEFORE USE

BEFORE USE

Preparing for operation

• Contact an installation specialist for installation.

• Use a dedicated circuit.

Usage

• 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.

• Due to the possibility of oxygen deficiency, ventilate the room when used together with stoves
or other heating devices.

• 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.

Cleaning and maintenance

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

• Do not use water to clean inside the air conditioner. Exposure to water can destroy the insula­tion, leading to possible electric shock.

• 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.

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ENGLISH

Service

For repair and maintenance, contact your authorized service dealer.

If anyone other than a licensed Professional installs, repairs, or alters LG Electronics Air Condi­tioning Products, the warranty is voided.

- All costs associated with repair are then the full responsibility of the owner.

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8

PRODUCT INTRODUCTION

Name and function of parts

1 Indoor unit
2 Outdoor unit
3 Remote controller
4 Inlet air
5 Discharge air
6 Refrigerant piping, connection electric wire
7 Drain pipe
8 Ground wire

PRODUCT INTRODUCTION

7

6

5

2

1

4

Wire to ground outdoor unit to prevent electrical shocks.

3

8

PRODUCT INTRODUCTION

Type 1 Type 2

Forced Operation ButtonForced Operation Button

Forced Operation

Forced operation is used when the remote controller can’t be used.

• The operation will be started if the ON/OFF button is pressed.

Test Operation

During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of
room temperature, and resets after 18 minutes. During test operation, if the remote controller
signal is received, the unit can be set by the remote controller. If you want to use this operation,
Press and hold the ON/OFF button for 3 ~ 5 seconds, then the buzzer sound 1 will ‘beep’. If you
want to stop the operation, re-press the button.

Operating Method

The signal receiver is inside the unit.

• Point the remote control towards the signal receiver at the right side of the air conditioner to
operate it.

- There should not be any obstacles blocking the remote controller.

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Lamp

Forced Operation Button

10

Operation Indication Lamps

Type 1

PRODUCT INTRODUCTION

On/Off

Filter Sign

Timer

Defrost Mode

Forced Operation

Lights up during the system operation.

Lights up after 2 400 hours from the time of first operating unit.

Lights up during Timer operation.

Lights up during Defrost Mode or Hot Start operation. (Heat
pump model only)

To operate the unit when the remote control can’t be used for
any reason.

Type 2

Description Lamp Color

Cooling mode Green
Heating mode Green
Time to clean filter in cooling/heating mode Yellowish Green
Time to clean filter when product is not opeating Orange
Hot start or defrost mode before starting heating mode Green
When reservation set on Yellowish Green

Auto Restart Function

This function is useful in the case of power failure. When power regains after a failure this fea­ture restores the previous operating condition and the air conditioner will run in the same set­tings.

NOTE

!

•

This feature is enabled by the factory default settings, but you can disable it by pressing
and holding the ON/OFF button for 6 seconds. The unit will beep twice and the lamp will
blink 8 times.

• To enable it, press the button again for 6 seconds. The unit will beep twice and the blue
lamp will blink 4 times.