LG R410A Manual de usuario

System

Air Conditioner

SERVICE MANUAL R410A

MODELS: ARUN/ARUV Series

ARNU Series

website http://www.lgservice.com

CAUTION

• BEFORE SERVICING THE UNIT, READ THE SAFETY

PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

Air Conditioner Service Manual

TABLE OF CONTENTS

Safety Precautions .......................................................................................3

Model Names ..............................................................................................11

External Appearance ..................................................................................12

Nomenclature..............................................................................................14

Outdoor Units Information.........................................................................15

Indoor Units...........................................................................................17

Ceiling Mounted Cassette Type (4 way)....................................................19

Art Cool Type ............................................................................................31

Art Cool Type(Wide)..................................................................................45

Ceiling Concealed Duct Type (Low static) ................................................58

Ceiling Concealed Duct Type (High static)................................................68

Outdoor Units.......................................................................................79

Trouble shooting guide ............................................................................113

Exploded View & Replacement Parts List ..............................................183

Service Manual 3

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.

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

WARNING

CAUTION

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

Be sure not to do.

Be sure to follow the instruction.

WARNING

■Installation

Have all electric work done by a licensed electri-

cian according to "Electric Facility Engineering

Standard" and "Interior Wire Regulations" and the

instructions given in this manual and always use a

special circuit.

• If the power source capacity is inadequate or electric

work is performed improperly, electric shock and fire

may result.

Ask the dealer or an authorized technician to

install the air conditioner.

• Improper installation by the user may result in water

leakage, electric shock, or fire.

Always ground the product.

• There is risk of fire or electric shock.

Always intstall a dedicated circuit and breaker.

• Improper wiring or installation may cause fire or elec-

tric shock.

Safety Precautions

For re-installation of the installed product, always

contact a dealer or an Authorized Service Center.

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

Do not install, remove, or re-install the unit by

yourself (customer).

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

Do not store or use flammable gas or

combustibles near the air conditioner.

• There is risk of fire or failure of product.

Use the correctly rated breaker or fuse.

•Thereisriskoffireorelectricshock.

Prepare for typhoons and other strong winds and

earthquakes and install the unit at the specified

place.

• Improper installation may cause the unit to topple and

result in injury.

Do not install the product on a defective installa-

tion stand.

• It may cause injury, accident, or damage to the prod-

uct.

When installing and moving the air conditioner to

another site, do not charge it with a

differnet refrigerant from the refrigerant specified

on the unit.

• If a differnet refrigerant or air is mixed with the original

refrigerant, the refrigerant cycle may malfunction and

the unit may be gamaged.

Do not reconstruct to change the settings of the

protection devices.

• If the pressure switch, thermal switch, or other protec-

tion device is shorted and operated forcibly, or parts

other than those specified by LGE are used, fire or

explosion may result.

Gasolin

Service Manual 5

Safety Precautions

Ventilate before operating air conditioner when gas

goes out.

• It may cause explosion, fire, and burn.

Securely install the cover of control box and the

panel.

• If the cover and panel are installed securely, dust or

water may enter the outdoor unit and fire or electric

shock may result.

If the air conditioner is installed in a small room, measures must be taken to prevent the

refrigerant concentration from exceeding the safety limit when the refrigerant leaks.

• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the

refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.

■Operation

Do not damage or use an unspecified power cord.

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

Use a dedicated outlet for this appliance.

• There is risk of fire or electrical shock.

Be cautious that water could not enter the product.

• There is risk of fire, electric shock, or product damage.

Do not touch the power switch with wet hands.

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

Safety Precautions

When the product is soaked (flooded or

submerged), contact an Authorized Service Center.

• There is risk of fire or electric shock.

Be cautious not to touch the sharp edges when

installing.

• It may cause injury.

Take care to ensure that nobody could step on or

fall onto the outdoor unit.

• This could result in personal injury and product dam-

age.

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 prod-

uct failure.

■Installation

Always check for gas (refrigerant) leakage after

installation or repair of product.

• Low refrigerant levels may cause failure of

product.

Do not install the product where the noise or hot

air from the outdoor unit could damage the neigh-

borhoods.

• It may cause a problem for your neighbors.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the unit where combustible gas may

leak.

• If the gas leaks and accumulates around the unit, an

explosion may result.

90˚

Gasolin

Service Manual 7

Safety Precautions

Use power cables of sufficient current

carrying capacity and rating.

•Cables that are too small may leak, generate heat, and

cause a fire.

Do not use the product for special purposes, such

as preserving foods, works of art, etc. It is a con-

sumer air conditioner, not a precision refrigeration

system.

•There is risk of damage or loss of property.

Keep the unit away from children. The heat

exchanger is very sharp.

•It can cause the injury, such as cutting the finger. Also

the gamaged fin may result in degradation of capacity.

When installting the unit in a hospital, communica-

tion station, or similar place, provide surfficient

protection against noise.

•The inverter equipment, private power generator, high-

frequency medical equipment, or radio communication

equipment may cause the air conditioner to operate

erroneously, or fail to operate. On the other hand, the

air conditioner may affect such equipment by creating

noise that disturbs medical treatment or image broad-

casting.

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.

Safety Precautions

■Operation

Do not use the air conditioner in special

environments.

•Oil, steam, sulfuric smoke, etc. can significantly reduce

the performance of the air conditioner or damage its

parts.

Do not block the inlet or outlet.

•It may cause failure of appliance or accident.

Make the connections securely so that the outside

force of the cable is not applied to the terminals.

•Inadequate connection and fastening may generate

heat and cause a fire.

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 per-

sonal injury.

Be very careful about product transportation.

•Only one person should not carry the product if it weighs more than 20 kg.

•Some products use PP bands dor packaging. Do not use any PP bands for

a means of transportation. It is dangerous.

•Do not touch the heat exchanger fins. Doing so may cut your fingers.

•When transporting the Outdoor Unit, suspending it at the specified posi-

tions on the unit base. Also support the Outdoor Unit at four points so that

it cannot slip sideways.

Install and insulate the drain hose to ensure that

water is drained away properly based on the instal-

lation manual.

•A bad connection may cause water leakage.

Do not operate with "System louver" closed.

•It may cause failure of appliance or accident.

Service Manual 9

Safety Precautions

Safely dispose of the packing materials.

•Packing materials, such as mails and other metal or

wooden parts, may cause stabs or other injuries.

•Tear apart and throw away plastic packaging bags so

that children will not play with them. If

children play with a plastic bag which

was not torn apart, they face the risk

of suffocation.

Turn on the power at least 2 hours before starting

operation.(In case of outdoor

temperature 5°C below)

•Starting operation immediately after turning on the

main power switch can result in severe

damage to internal parts. Keep the power switch

turned on during the operational season.

Donottouchanyoftherefrigerantpipingduring

and after operation.

•It can cause a burn or frostbite.

Do not operate the air conditioner with the panels

and guards removed.

•Rotating, hot, or high-voltage parts can cause injuries.

Do not directly turn off the main power switch after

stopping operation.

•Wait at least more than 5 minutes before turning off the

main power switch. Otherwise it may result in water

leakage or other problems.

Auto-addressing should be done in condition of

connecting the power of all indoor and outdoour

units. Auto-addressing should also be done in

case of changing the Indoor Unit board(PCB).

Useafirmstoolorladderwhencleaningormain-

taining the air conditioner.

•Be careful and avoid personal injury.

Do not insert hands or other objects through the

air inlet or outlet while the air conditioner is

plugged in.

•There are sharp and moving parts that could cause

personal injury.

Part 1

General Information

1. Model Names ................................................................11

1.1 Indoor Unit .............................................................11

1.2 Outdoor Unit ..........................................................11

2. External Appearance.....................................................12

2.1 Indoor Unit .............................................................12

2.2 Outdoor Unit ..........................................................13

3. Nomenclature.................................................................14

3.1 Indoor Unit .............................................................14

3.2 Outdoor Unit ..........................................................14

4. Outdoor Units information............................................15

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