LG ARNU05GTRB4, ARNU12GTRC4, ARNU30GTBB4 Owner's Manual

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

OWNER’S MANUAL

AIR
CONDITIONER

www.lg.com

Copyright © 2014 - 2020 LG Electronics Inc. All Rights Reserved.

MFL68686404

Rev.03_072420

ENGLISH

ESPAÑOL

PORTUGUÊS

Table of Contents

TABLE OF CONTENTS

3 SAFETY INSTRUCTIONS

7 PRIOR TO OPERATION

7 Preparing for operation

7 Usage

7 Cleaning and maintenance

7 Service

7 OPERATING INSTRUCTIONS

7 Auto Restart Function

8 MAINTENANCE AND SERVICE

8 Ceiling Cassette - 4Way

9 Ceiling Cassette - Round

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

10 Operation Tips

11 Before you call for service...

2 Indoor Unit

Safety Instructions

The following symbols are displayed on indoor and outdoor units

Safety Instructions

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

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.

• 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.

Owner’s Manual 3

Safety Instructions

• Do not install the product on a defective installation stand.

- It may cause injury, accident, or damage to the product.

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

- Otherwise, it may cause fire, electric shock, explosion or death.

• 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.

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

• The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation. (for R32)

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

• 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 risk of fire or electric shock.

• Do not place anything on the power cable.

- 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 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, smell 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.

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

- This could result in personal injury and product damage.

4 Indoor Unit