LG T18LH User Manual

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OWNER'S MANUAL

AIR CONDITIONER

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

TYPE : Ceiling Cassette

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.

P/NO : 3828A22005R

www.lg.com

Ceiling Cassette Air Conditioner Ownerʼs Manual

TABLE OF CONTENTS

Safety Precautions.........................	3
Prior to Operation ..........................	6
Introduction ....................................	7
Electrical Safety .............................	8
Operating Instructions...................	9
Maintenance and Service ............	28

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.

2 Ceiling Cassette Air Conditioner

Safety Precautions

To prevent injury to 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.

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

Be sure not to do.

Be sure to follow the instruction.

ENGLISH

■ 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.

Install the panel and the cover of control box securely.

•There is risk of fire or electric shock.

Do not modify or extend the power cable.

•There is risk of fire or electric shock.

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

•There is risk of fire, electric shock, explosion, or injury.

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.

Always install a dedicated	Use the correctly rated
circuit and breaker.	breaker or fuse.

•Improper wiring or installation may cause fire or electric shock

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

•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.

•There is risk of fire or electric shock.

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.

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.

Owner's Manual 3

Safety Precautions

■ Operation

Do not let the air conditioner run for a	Take care to ensure that power
long time when the humidity is very high	cable could not be pulled out or
and a door or a window is left open.	damaged during operation.
• Moisture may condense and wet	• There is risk of fire or electric
or damage furniture.	shock.
Do not plug or unplug the	Do not touch(operate) the
power supply plug during	product with wet hands.
operation.
• There is risk of fire or electric	• There is risk of fire or electrical
shock.	shock.
Do not allow water to run	Do not store or use flammable
into electric parts.	gas or combustibles near the
	product.
• It may cause There is risk of fire,	• There is risk of fire or failure of
failure of the product, or electric shock.	product.

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

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.

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.

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

•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 place a heater or other appliances near the power cable.

•There is risk of fire and electric shock.

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

• Oxygen deficiency could occur.

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.

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.

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.

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 Ceiling Cassette Air Conditioner

Safety Precautions

■ Installation

Always check for gas	Install the drain hose to
(refrigerant) leakage after	ensure that water is drained
installation or repair of product.	away properly.
• Low refrigerant levels may cause	• A bad connection may cause
failure of product.	water leakage.
Do not install the product where the	Use two or more people to
noise or hot air from the outdoor unit	lift and transport the
could damage the neighborhoods.	product.
• It may cause a problem for your	• Avoid personal injury.
neighbors.

Keep level even when installing the product.

•To avoid vibration or water leakage.

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.

■ Operation

Do not expose the skin directly to cool air	Do not use the product for special purposes, such as
for long periods of time.	preserving foods, works of art, etc. It is a consumer
(Don't sit in the draft.)	air conditioner, not a precision refrigeration system.
• This could harm to your health.	• 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.

Do not drink the water drained from the 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.

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

• It is not sanitary and could cause	• Be careful and avoid personal
serious health issues.	injury.

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.

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.	If the liquid from the batteries gets onto your
Do not dispose of batteries in a fire.	skin or clothes, wash it well with clean water. Do
	not use the remote if the batteries have leaked.
• They may burn or explode.	• The chemicals in batteries could cause burns or
	other health hazards.

ENGLISH

Owner's Manual 5

Prior to Operation

Preparing for operation

1.Contact an installation specialist for installation.

2.Plug in the power plug properly.

3.Use a dedicated circuit.

4.Do not use an extension cord.

5.Do not start/stop operation by plugging/unplugging the power cord.

6.If the cord/plug is damaged, replace it with only an authorized replacement part.

Usage

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.

Cleaning and maintenance

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 unitʼs power is accidentally triggered on while cleaning inner parts of the unit.

Service

For repair and maintenance, contact your authorized service dealer.

6 Ceiling Cassette Air Conditioner

Introduction

Symbols used in this Manual

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that could cause harm to the air conditioner.

NOTICE This symbol indicates special notes.

ENGLISH

Features

WARNING: This appliance should be installed in accordance with national wiring regulations. This guide acts as a guide to help to explain product features.

Heat Pump Model

Anti-bacteria

Signal Receptor

Air

Intake	Cooling Model
Air Outlet
	Remote
	Controller
	Signal Receptor

Owner's Manual 7

Electrical Safety

WARNING: This appliance must be properly grounded.

To minimize the risk of electric shock, you must alway plug into a grounded oulet.

Preferred method

Ensure proper ground exists before use

WARNING: Do not cut or remove the grounding prong from the power wire.

WARNING: Attaching the adapter ground terminal to the wall receptacle cover screw does not ground the appliance unless the cover screw is metal and not insulated, and the wall receptacle is grounded through the house wiring.

WARNING: If you have any doubt whether the air conditioner is properly grounded, have the wall receptacle and circuit checked by a qualified electrician.

8 Ceiling Cassette Air Conditioner

Operating Instructions

Indoor Unit, Outdoor Unit

Indoor Unit

Operating Instructions

ENGLISH

Heat Pump Model

Anti-bacteria

Air

Intake

Air Outlet

Remote

Controller

Signal Receptor

Receives the signals from the remote control.

(Signal receiving sound: two short beeps or one long beep.)

Signal Receptor

Cooling Model

Signal Receptor

Operation Indication Lamps

			On/Off	: Lights up during the system operation.


			Filter Sign	: Lights up after 2400 hours from the time of first
				operating unit. (Refer to page 28.)
			Timer	: Lights up during Timer operation.
			Defrost Mode	: Lights up during Defrost Mode or Hot Start operation.
			Defrost Mode	: Lights up during Defrost Mode or Hot Start operation.
				(Heat pump model only)
			Outdoor Unit	: Lights up during outdoor unit operation.
			Operation	(Cooling model only)
			Forced	: Operation procedures when the remote control
			Operation	can't be used.

Owner's Manual 9

Operating Instructions

Name and Function of Remote Controller

AUTO SWING

OPERATION

SET TEMP

FAN SPEED

SUB FUNCTION

Room Temp

AUTO

Heater

Preheat

MED

JET

Defrost

Humidify

SLo

Filter

Out door

2ndF

Time

ZONE

1 2 3 4

Timer

Operation unit

No Func

Program set

On Off

Set no. Time

05 07

09 11 13

15 17

2 6 3 7

Timer	Cancel	2ndF		8
				8
Program Week		Holiday		9
4		Set/Clr	PLASMA	10
		Set/Clr		10
Hour	Min		RESET	11
Hour	Min			11
				12
				13

1.Operation indication screen

2.Swirl button

3.2nd F button

4.Timer set/cancel Program/Week/Holiday Hour/Min/SET/Clr/Ventilator

5.Set temperature button

6.ON/OFF button

7.Fan operation

8.Operation mode selection button

9.Fan speed button

10.Horizontal/Vertical air flow direction button

11.Room temperatur/filtersign release button

12.Plasma/Heater button

13.Time reset button

14.Operation lamp

10 Ceiling Cassette Air Conditioner

+ 21 hidden pages