LG Multi V Water V ARWM072CAS5 Bedienungsanleitung

Outdoor Unit

SERVICE MANUAL

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

R410A

CONFIDENTIAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,

modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained

the prior written consent of the LG Electronics entity from which you received this Service Manual. The material

covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

- 2 -

Air Conditioner Service Manual

TABLE OF CONTENTS

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

Part 1 General Information ........................................................................................8

Part 2 Outdoor units.................................................................................................16

Part 3 HR Units ........................................................................................................44

Part 4 PCB Setting and Test Run ........................................................................... 55

Part 5 Trouble shooting guide................................................................................ 87

- 3 -

Safety Precautions

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

be followed.

nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

nMeanings 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

nInstallation

Have all electric work done by a licensed

electrician 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 or 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

electric shock.

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.

- 4 -

Safety Precautions

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.

• There is risk of fire or electric shock.

Prepare for strong wind or earthquake and

install the unit at the specified place.

• Improper installation may cause the unit to top-

ple and result in injury.

Do not install the product on a defective

installation stand.

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

product.

When installing and moving the air condition-

er to another site, do not charge it with a

different refrigerant from the refrigerant

specified on the unit.

• If a different refrigerant or air is mixed with the

original refrigerant, the refrigerant cycle may

malfunction and the unit may be damaged.

Do not reconstruct to change the settings of

the protection devices.

• If the pressure switch, thermal switch, or other

protection device is shorted and operated

forcibly, or parts other than those specified by

LGE are used, fire or explosion may result.

Ventilate before operating air conditioner

when gas leaked out.

• It may cause explosion, fire, and burn.

Securely install the cover of control box and

the panel.

• If the cover and panel are not 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

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 gas es.

Otherwise, it may cause fire or explosion.

• There is the risk of death, injury, fire or explo-

sion.

- 5 -

nOperation

Safety Precautions

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.

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

damage.

Do not open the inlet grille of the product

during operation. (Do not touch the electro-

static filter, if the unit is so equipped.)

• There is risk of physical injury, electric shock, or

product failure.

CAUTION

nInstallation

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 neighborhoods.

• 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.

- 6 -

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 consumer 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 damaged fin may result in degradation

of capacity.

When installting the unit in a hospital, com-

munication station, or similar place, provide

sufficient protection against noise.

•

The inverter equipment, private power generator,

high-frequency medical equipment, or radio com-

munication equipment may cause the air condition-

er 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 broadcasting.

Do not install the product where it is 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.

nOperation

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 may not be applied

to the terminals.

• Inadequate connection and fastening may gen-

erate heat and cause a fire.

Be sure the installation area does not deteri-

orate with age.

• If the base collapses, the air conditioner could

fall with it, causing property damage, product

failure, or personal injury.

- 7 -

Safety Precautions

Install and insulate the drain hose to ensure

that water is drained away properly based on

the installation manual.

• A bad connection may cause water leakage.

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 for 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 positions on the unit base. Also support the

Outdoor unit at four points so that it cannot slip sideways.

Safely dispose of the packing materials.

•

Packing materials, such as nails and other metal or

wooden parts, may cause stabs or other injuries.

•

Tear apart and throw away plastic packaging bags

so that children may 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 6 hours before

starting operation.

• 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.

Do not touch any of the refrigerant piping

during and after operation.

• It can cause a burn or frostbite.

Do not operate the air conditioner with the

panels or 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 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 PCB.

Use a firm stool or ladder when cleaning or

maintaining 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.

- 8 -

Part 1

General Information

1. Model Names ..................................................................................9

1.1 Indoor Unit.................................................................................9

1.2 Outdoor unit.............................................................................10

1.3 HR Unit....................................................................................10

2. External Appearance .....................................................................11

2.1 Indoor Unit ...............................................................................11

2.2 Outdoor unit.............................................................................12

3. Combination of Outdoor units .....................................................13

4. Nomenclature.................................................................................14

4.1 Indoor Unit...............................................................................14

4.2 Outdoor unit.............................................................................14

4.3 HR Unit....................................................................................15

Model Names

- 9 -

1. Model Names

1.1 Indoor Unit

h*Wall Mounted - L : Basic, R : Mirror

*Ceiling Cassette - A : Basic, C : Plasma

*Ceiling Concealed Duct - A : Basic, Z : FAU

Category Chassis

Name

Capacity[Btu/h(kW)]

5.5

(1.6)

7.2

(2.2)

9.6

(2.8)

12.3

(3.6)

15.4

(4.5)

19.1

(5.6)

24.2

(7.1)

28.0

(8.2)

30.0

(8.8)

36.2

(10.6)

42.0

(12.3)

48.1

(14.1)

54.0

(15.8)

76.4

(22.4)

96.5

(28.0)

Wall Mounted

ARNU053SJ*4 ARNU073SJ*4 ARNU093SJ*4 ARNU123SJ*4 ARNU153SJ*4

ARNU183SK*4 ARNU243SK*4

ARNU303SVA4 ARNU363SVA4

ART

COOL SF

ARNU093SFA4 ARNU123SFA4

Ceiling

Cassette

1 Way

ARNU073TUC4 ARNU093TUC4 ARNU123TUC4

ARNU183TTC4 ARNU243TTC4

2 Way TL

ARNU183TLC4 ARNU243TLC4

4 Way

ARNU053TRC4 ARNU073TRC4 ARNU093TRC4 ARNU123TRC4

ARNU153TQC4 ARNU183TQC4

ARNU243TPC4 ARNU283TPC4

ARNU073TNA4 ARNU093TNA4 ARNU123TNA4 ARNU153TNA4 ARNU183TNA4 ARNU243TNA4 ARNU363TNA4

ARNU243TMA4 ARNU283TMA4 ARNU363TMA4 ARNU423TMA4 ARNU483TMA4

Ceiling

Concealed

Duct

High

Static

ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 ARNU153BHA4 ARNU183BHA4 ARNU243BHA4

ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 ARNU153BGA4 ARNU183BGA4 ARNU243BGA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4

ARNU283BRA4 ARNU363BRA4 ARNU423BRA4 ARNU483BR*4 ARNU543BRA4

ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 ARNU763B8*4 ARNU963B8*4

Low

Static

ARNU073L1G4 ARNU093L1G4

ARNU123L2G4 ARNU153L2G4 ARNU183L2G4

ARNU243L3G4

Middle

Static

ARNU073M2A4 ARNU093M2A4 ARNU123M2A4 ARNU153M2A4 ARNU183M2A4 ARNU243M2A4 ARNU283M2A4 ARNU363M2A4 ARNU423M2A4

ARNU283M3A4 ARNU363M3A4 ARNU423M3A4 ARNU483M3A4 ARNU543M3A4

Built

ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4

ARNU183B4G4 ARNU243B4G4

Ceiling & Floor VE

ARNU093VEA2 ARNU123VEA2

Ceiling Suspended VJ

ARNU183VJA2 ARNU243VJA2

Floor

Standing

With

Case

ARNU073CEA4 ARNU093CEA4 ARNU123CEA4 ARNU153CEA4

ARNU183CFA4 ARNU243CFA4

Without

Case

ARNU073CEU4 ARNU093CEU4 ARNU123CEU4 ARNU153CEU4

ARNU183CFU4 ARNU243CFU4

Vertical AHU

ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 ARNU303NJA4 ARNU363NJA4

ARNU423NKA4 ARNU483NKA4 ARNU543NKA4

- 10 -

Model Names

1.2 Outdoor Unit

1.3 HR Unit

Heat Pump ARWM

Heat Recovery

Power Supply 24 HP

(20 Ton)

28 HP

(24 Ton)

34 HP

(28 Ton)

43 HP

(36 Ton)

46 HP

(16 Ton)

54 HP

(48 Ton)

3 Ph, 575 V, 60 Hz 240CAS5 288CAS5 336CAS5 432CAS5 480CAS5 576CAS6

Power Supply 8 HP

(6 Ton)

10 HP

(8 Ton)

12 HP

(10 Ton)

14 HP

(12 Ton)

20 HP

(16 Ton)

3 Ph, 575 V, 60 Hz 072CAS5 096CAS5 121CAS5 144CAS5 192CAS5

Power Supply 2 branches 3 branches 4 branches

1 Ph, 208/230 V, 60 Hz PRHR022A PRHR032A PRHR042A

Power Supply 2 branches 3 branches 4 branches

1 Ph, 220-240 V, 50 Hz / 1 Ph, 220 V, 60 Hz PRHR023 PRHR033 PRHR043

1 Ph, 208/230 V, 60 Hz PRHR023A PRHR033A PRHR043A

Power Supply 6 branches 8 branches

1 Ph, 220-240 V, 50 Hz / 1 Ph, 220 V, 60 Hz PRHR063 PRHR083

1 Ph, 208/230 V, 60 Hz PRHR063A PRHR083A

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