system indoor unit r410a service manual r410a

SystemIndoor Unit SERVICE MANUAL R410AMODEL : ARNU Series URNU Series

CAUTIONBefore Servicing the unit, read the safety precautions in General SVC manual.Only for authorized service personnel.

Internal Use Only

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R410A

- 2 -Copyright ©2010 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only

Air Conditioner Service Manual

TABLE OF CONTENTS

Part 1 General Information .......................................................................................................3

Model Names ...............................................................................................................................4

External Appearance ...................................................................................................................5

Nomenclature ...............................................................................................................................6

Part 2 Indoor Units ......................................................................................................................7Ceiling Mounted Cassette Type (1 way) ........................................................................................8Ceiling Mounted Cassette Type (2 way) ......................................................................................16Ceiling Mounted Cassette Type (4 way)(1)..................................................................................21Ceiling Mounted Cassette Type (4 way)(2)..................................................................................27Art Cool Type(Mirror) ...................................................................................................................34Art Cool Type(Gallery) .................................................................................................................45Ceiling Concealed Duct Type (Low static) ...................................................................................55Ceiling Concealed Duct Type (Built in) ........................................................................................61Ceiling Concealed Duct Type (High static) ..................................................................................67Wall Mounted Type ......................................................................................................................76Ceiling & Floor Ceiling Suspended ..............................................................................................87Floor Standing Type.....................................................................................................................94Vertical Air Handling Unit ...........................................................................................................101

Part 3 Trouble shooting guide...............................................................................109


Part 1 General Information

1. Model Names .............................................4

2. External Appearance .................................5

3. Nomenclature .............................................6

Model Names


1. Model Names

h *ART COOL- SE/S8( * R:Mirror, V:Silver, B : Blue), SF(* E:Red, V:Silver, G:Gold , 1: Kiss (Photo changeable))*Wall Mounted- A: Basic, L:Plasma, *Ceiling Cassette- A: Basic, C:Plasma

Category ChassisName

Capacity(Btu/h(kW)) 7.5

(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)

95.5(28.0)

Wall Mounted(General)

SE ARNU073SE*2

ARNU093SE*2

ARNU123SE*2

ARNU153SE*2

S5 ARNU183S5*2

ARNU243S5*2

ARTCOOL

Mirror SE ARNU07

3SE*2 ARNU093SE*2

ARNU123SE*2

ARNU153SE*2

S8 ARNU183S8*2

ARNU243S8*2

CeilingCassette

1 Way TJ ARNU073TJ*2

ARNU093TJ*2

ARNU123TJ*2

2 Way TL ARNU183TL*2

ARNU243TL*2

4 Way

TR ARNU073TR*2

ARNU093TR*2

ARNU123TR*2

TQ ARNU153TQ*2

ARNU183TQ*2

TP ARNU243TP*2

ARNU283TP*2

TN ARNU363TN*2

TM ARNU423TM*2

ARNU483TM*2

CeilingConcealed

Duct

High Static

BH ARNU073BHA2

ARNU093BHA2

ARNU123BHA2

ARNU153BHA2

ARNU183BHA2

ARNU243BHA2

BG ARNU283BGA2

ARNU363BGA2

ARNU423BGA2

BR ARNU483BRA2

B8 URNU763B8A2

URNU963B8A2

Low Static B1 ARNU07

3B1G2 ARNU093B1G2

ARNU123B1G2

ARNU153B1G2

B2 ARNU183B2G2

ARNU243B2G2

Built In B3 ARNU07

3B3G2 ARNU093B3G2

ARNU123B3G2

ARNU153B3G2

B4 ARNU183B4G2

ARNU243B4G2

Ceiling & Floor VE ARNU093VEA2

ARNU123VEA2

Ceiling Suspended VJ ARNU183VJA2

Floor Standing

With Case CE ARNU07

3CEA2 ARNU093CEA2

ARNU123CEA2

ARNU153CEA2

CF ARNU183CFA2

ARNU243CFA2

WithoutCase

CE ARNU073CEU2

ARNU093CEU2

ARNU123CEU2

ARNU153CEU2

CF ARNU183CFU2

ARNU243CFU2

Vertical AHUNJ ARNU18

3NJA2ARNU243NJA2

ARNU303NJA2

ARNU363NJA2

NK ARNU423NKA2

ARNU483NKA2

ARNU543NKA2

External Appearance


2. External Appearance

Wall Mounted

ART COOL Mirror

Ceiling Cassette- 1Way

Ceiling Cassette- 4Way

Ceiling & Floor

Ceiling Suspended

ARNU073TJ*2 ARNU093TJ*2ARNU123TJ*2

Ceiling Cassette -2WayARNU183TL*2ARNU243TL*2

ARNU073TR*2ARNU093TR*2ARNU123TR*2ARNU153TQ*2ARNU183TQ*2

ARNU243TP*2 ARNU283TP*2ARNU363TN*2ARNU423TM*2ARNU483TM*2

Ceiling Concealed Duct - Low StaticARNU073B1G2 ARNU093B1G2ARNU123B1G2

ARNU153B1G2ARNU183B2G2ARNU243B2G2

ARNU073SE*2 ARNU093SE*2ARNU123SE*2

ARNU153SE*2ARNU183S5*2 ARNU243S5*2

ARNU073SE*2 ARNU093SE*2ARNU123SE*2 ARNU153SE*2ARNU183S8*2ARNU243S8*2

ARNU093VEA2ARNU123VEA2

ARNU183VJA2ARNU243VJA2

Floor Standing With caseARNU073CEA2ARNU093CEA2ARNU123CEA2ARNU153CEA2ARNU183CFA2ARNU243CFA2

Without caseARNU073CEU2ARNU093CEU2ARNU123CEU2ARNU153CEU2ARNU183CFU2ARNU243CFU2

Vertical AHUARNU183NJA2 ARNU243NJA2 ARNU303NJA2ARNU363NJA2ARNU423NKA2 ARNU483NKA2ARNU543NKA2

Ceiling Concealed Duct - High StaticARNU073BHA2ARNU093BHA2ARNU123BHA2ARNU153BHA2ARNU183BHA2ARNU243BHA2ARNU283BGA2

ARNU363BGA2ARNU423BGA2ARNU483BRA2URNU763B8A2URNU963B8A2

Ceiling Concealed Duct – Built-inARNU073B3G2 ARNU093B3G2ARNU123B3G2

ARNU153B3G2ARNU183B4G2ARNU243B4G2

* A:Basic, L:Plasma* A:Basic, C:Plasma

* A:Basic, C:Plasma

* A:Basic, C:Plasma

* R:Mirror V:Silver B : Blue

Nomenclature


3. Nomenclature

ARN U 307 ATJ 2

Generation

Chassis Name

Electrical Ratings

1:1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz6:1Ø, 220 - 240V, 50Hz 7: 1Ø, 100V, 50/60Hz3:1Ø, 208/230V, 60Hz

Total Cooling Capacity in Btu/h Class EX) 18,000 Btu/h Class → '18'

Combination of Inverter Type and Cooling Only or Heat PumpN: AC Inverter and H/P V: AC Inverter and C/OU: DC Inverter and H/P and C/O

System with Indoor Unit using R410A

❈ LGETA:U Ex) URN

Combinations of functionsA: Basic function L: Neo Plasma(Wall Mounted)C:Plasma(Ceiling Cassette) G: Low Static U: Floor Standing without CaseART COOL Type Panel ColorB:Blue R:Mirror V: Silver


Part 2 Indoor Units

Ceiling Cassette1 Way.................................................................................82 Way...............................................................................134 Way(1)...........................................................................204 Way(2)...........................................................................23

Art Cool SeriesART COOL Miror..............................................................34ART COOL Gallery ..........................................................45

Ceiling Concealed DuctLow Static ........................................................................55Built In ..............................................................................62High Static........................................................................67

Wall Mounted(General)Wall Mounted ...................................................................76

Ceiling & FloorCeiling & Floor Ceiling Suspended...........................................................87

Floor StandingFloor Standing..................................................................94

Vertical Air Handling Unit................................................117


1. Functions ......................................................................................9

2. Operation Details........................................................................10

3. Dimensions .................................................................................12

Ceiling Mounted Cassette Type (1Way)


Functions

1. Functions

Indoor Unit

Operation ON/OFF by Remote controller

Sensing the Room Temperature

Room temperature control

Starting Current Control

Indoor Fan Speed Control

Soft Dry Operation Mode

Airflow Direction Control

Deice (defrost) control (Heating)

Auto Restart

Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pip-ing temperature will be reached at 25°C(76°F).

Compact and light design • To install a unit is very convenient because of smallersize than textile.

Low noise• The most advanced low-noise design.• The adoption of turbo fan and round type heat exchang-

er give the quietest operation.

Long life filter • Long life wrinkle(type) and washable and anti-bacteriafilter is adopted.

High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm(27-9/16inch) is

possible.

High-Ceiling corresponding Function • According to the height of ceiling, the RPM of indoor fanmotor is selected to increase air reaching distance.

Central Control(Optional) • It is operating individually or totally by central control function.

• Room temperature sensor. (Thermistor)

• Maintains the room temperature in accordance with the Setting Temperature.

• Indoor fan is delayed for 5 seconds at the starting.

• Jet, High, Med, Low, Lolow

• Intermittent operation of fan at low speed.

• The louver can be set at swing up and down automatically.

• Although the air-conditioner is turned off by a power failure, it is restarted auto-matically previous operation mode after power supply.

• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.


2. Operation Detail

n Auto Swing Control• This function is to swing the louver up and down automatically.

n Soft-Dry Operation• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of

already being set to the best speed for Dry Operation by microcontroller control.

n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-

troller and the operation diagram is as following

(1) The function of main control

Operation Detail

Thermal ON Thermal OFF

Indoor Unit mode ST+0.5 ST-0.5

2TH (Remo.+Indoor)To be selected higher temperature To be selected higher temperature

contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.

Remo. Mode ST+0.5 ST-0.5

Intake Air Temperature

Thermo. ON(SET TEMPERATURE +0.5°C(33°F))

Thermo. OFF(SET TEMPERATURE More than More than-0.5°C(33°F))

3 minutes 3 minutes

Selected Selected SelectedSpeed Speed Speed

INDOOR FAN Low Low


n Heating Mode OperationThe unit will operate according to the setting by the remote controller and the operation diagram is shown as following.

n Hot-start Control

• The indoor fan does no rotate until the evaporator piping temperature will be reached to 25°C(76°F).• The operation diagram is as following.

35°C(94°F)30°C(86°F)

27°C(80°F)25°C(76°F)

22°C(72°F)

Pipetemperature

OFFIndoor fan

speed

LOLOW

LOW SELECTEDFAN

LOW LOLOW

COMP ON

Operation Detail

Thermal OFF ON

OFF ON

ON

ONOutdoor fan

Indoor fan

4 Way ON

Room

Temperature

Thermal Off

Thermal On

Indoor pipeTemperature

33°C(92°F)

25°C(76°F)20°C(68°F)

36°C(96°F)

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan

speedStop Low Stop StopLow LowLow Low


Indoor Unit mode ST+2 ST+4

2TH To be selected lower temperature To be selected lower temperature(Remo.+Indoor) contrast Indoor Unit and Remo. contrast Indoor Unit and Remo.

Remo. mode ST+0 ST+2


3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

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on C

ity, G

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orea

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Dimensions

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1. Functions ....................................................................................17


3. Dimensions .................................................................................20

Ceiling Mounted Cassette Type (2Way)


1. Functions

Indoor Unit









Auto Restart






High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm

(27-9/16inch) is possible.











Functions


2. Operation Detail







Operation Detail









3 minutes 3 minutes


INDOOR FAN Low Low



n Hot-start Control


35°C(94°F)30°C(86°F)

27°C(80°F)25°C(76°F)

22°C(72°F)

Pipetemperature

OFFIndoor fan

speed

LOLOW

LOW SELECTEDFAN

LOW LOLOW

COMP ON

Operation Detail

Thermal OFF ON

OFF ON

ON

ONOutdoor fan

Indoor fan

4 Way ON

Room

Temperature

Thermal Off

Thermal On


33°C(92°F)

25°C(76°F)20°C(68°F)

36°C(96°F)

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

830(

32-1

1/16

)A

B47

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)

275(10-13/16)

550(21-11/16)

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1. Functions ....................................................................................22


3. Dimensions .................................................................................25

Ceiling Mounted Cassette Type (4Way) (1)


1. Functions

Indoor Unit









Auto Restart






High head Drain pump • Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm



Central Control(Optional)

Swirl Swing Control

• It is operating individually or totally by central control function.

• It is operating swirl swing









Functions


2. Operation Detail






n Swirl Swing ControlVane 2, 4 is almost vane closed while vane1, 3 is opened.

Vane 1, 3 and vane 2,4 turn over minutely


Operation Detail

Vane 2

Vane 1 Vane 3

Vane 4









3 minutes 3 minutes


INDOOR FAN Low Low



n Hot-start Control


35°C(94°F)30°C(86°F)

27°C(80°F)25°C(76°F)

22°C(72°F)

Pipetemperature

OFFIndoor fan

speed

LOLOW

LOW SELECTEDFAN

LOW LOLOW

COMP ON

Operation Detail

Thermal OFF ON

OFF ON

ON

ONOutdoor fan

Indoor fan

4 Way ON

Room

Temperature

Thermal Off

Thermal On


33°C(92°F)

25°C(76°F)20°C(68°F)

36°C(96°F)

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: TR

Cei

ling

Cas

sette

4-w

ay

AR

NU

05G

TR*2

AR

NU

07G

TR*2

AR

NU

09G

TR*2

AR

NU

12G

TR*2

Nam

e

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ipe

conn

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(5k, 7

k, 9k

, 12k

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5

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pip

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nnec

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Unit s

ize(5k

, 7k,

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Dra

in p

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Pow

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Air

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Num

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Des

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.

(uni

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570

570

517

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Dimensions

76, S

eong

san-

dong

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on C

ity, G

yeon

gnam

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1-71

3, K

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CH

AS

SIS

CO

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: TQ

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(uni

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570

570

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1. Functions ....................................................................................28


3. Dimensions .................................................................................31

Ceiling Mounted Cassette Type (4Way) (2)


1. Functions

Indoor Unit









Auto Restart






High head Drain pump• Built-in drain pump automatically drains water.• A standard drain-head height of up to 700mm



Central Control(Optional)

Swirl Swing Control

• It is operating individually or totally by central control function.

• It is operating swirl swing









Functions


2. Operation Detail







Operation Detail









3 minutes 3 minutes


INDOOR FAN Low Low



n Hot-start Control


35°C(94°F)30°C(86°F)

27°C(80°F)25°C(76°F)

22°C(72°F)

Pipetemperature

OFFIndoor fan

speed

LOLOW

LOW SELECTEDFAN

LOW LOLOW

COMP ON

Operation Detail

Thermal OFF ON

OFF ON

ON

ONOutdoor fan

Indoor fan

4 Way ON

Room

Temperature

Thermal Off

Thermal On


33°C(92°F)

25°C(76°F)20°C(68°F)

36°C(96°F)

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: TP

Cei

ling

Cas

sette

4-w

ay

AR

NU

21G

TP*2

AR

NU

24G

TP*2

AR

NU

28G

TP*2

Not

e

1. U

nit s

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.

684840

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(uni

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204

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QU

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Dimensions

840

246195

350

100 52

165

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

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CH

AS

SIS

CO

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Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

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100

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420

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500m

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1. Functions ....................................................................................35


3. Dimensions .................................................................................43

Art Cool Type(Mirror)


Functions

1. Functions

• Room temperature sensor. (THERMISTOR)

• Maintains the room temperature in accordance with the Setting Temp.

• Indoor fan is delayed for 5 sec at the starting.

• High, Med, Low, CHAOS


• The fan is switched to low(Cooling), med(Heating) speed.• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.

• The fan is switched to intermittent or irregular operation• The fan speed is automatically switched from high to low speed.

• The louver can be set at the desired position or swing up and down automatically.

Indoor Unit






Operation indication Lamps (LED)


• Both the indoor and outdoor fan stops dur-

ing defrosting.

• The indoor fan does not rotate until the evaporator pipe temperature will be reachedat 28°C(82°F).

Sleep Mode Auto Control

Natural Air Control by CHAOS Logic


Defrost(Deice) control (Heating)

Hot-start Control (Heating)

Signal ReceptorReceives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)Operation Indication Lamps

On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.


Operation Details

2. Operation Details

DISPLAY1) High quality LCD remote controller suppliedOperation Indicator

• On while in appliance operation, off while in appliance pause

Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled

Defrost Indicator• Off except when hot start during heating mode operation or while in defrost control.

Plasma Indicator• On while in plasma mode, off while plasma mode is canceled.

Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.

Auto restart• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate

procedures automatically to the previous operating conditions.If your want to use this operation, press the Auto Restart Button.

Power(Forced Operation)• Operation starts, when this button is pressed and stops when you press the button again.

n Cooling Mode Operation• When the intake air temperature reaches 0.5°C(33°F) below the setting temp, the compressor and the outdoor

fan stop.

• When it reaches 0.5°C(33°F) above the setting temp, they start to operate again.

Compressor ON Temp=> Setting Temp+0.5°C(33°F)

Compressor OFF Temp => Setting Temp-0.5°C(33°F)

• While in compressor running, operating with the airflow speed set by the remote controller. While in compres-sor not running, operating with the low airflow speed regardless of the setting.

n Healthy Dehumidification Mode• When the dehumidification operation input by the remote controller is received, the intake air temperature is

detected and the setting temp is automatically set according to the intake air temperature.

26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)

24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C(34°F)

18°C(64°F) ≤ Intake Air Temp < 24°C(76°F) => Intake Air Temp-0.5°C(33°F)

Intake Air Temp < 18°C(64°F) => 18°C(64°F)

• While in compressor off, the indoor fan repeats low airflow speed and pause.

• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidificationoperation and 4-min compressor off repeat

Compressor ON Temp. => Setting Temp+0.5°C(33°F)

Compressor OFF Temp. => Setting Temp-0.5°C(33°F)

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

n Heating Mode Operation

Function of Controls


Operation Details

• When the intake air Temp. reaches Compressor OFF Temp., the compressor is turned off.When the intake air Temp. reaches Compressor ON Temp., the compressor is turned on.

Themo ON Temp. => Setting Temp. +2˚C(36°F)

Themo OFF Temp. => Setting Temp.+4°C(39°F)

• While in compressor on, when above 38°C(100°F), it operates with setting airflow speed (while in sleep mode,with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C (92°F), when above35°C(94°F) , it operates with the low airflow speed.

• While in defrost control, both of the indoor and outdoor fans are turned off.

n Defrost Control• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to

defrost of the outdoor unit.

n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the

setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the compres-sor is turned on.

Compressor ON Temp => Setting Temp+0.5°C(33°F)

Compressor OFF Temp => Setting Temp+0.5°C(33°F)

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.


24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp+1°C(34°F)

22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)

18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp

Intake Air Temp<18°C(64°F) => 18°C(64°F)

• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, theFuzzy key value and the intake air temperature at that time are compared to select the setting temperatureautomatically according to the Fuzzy rule.

• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-ature

n Fuzzy Operation (Outdoor unit H/P Model)• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since

the operation off, the operation mode is selected.

• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling

21°C(70°F)≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification

Inatake Air Temp<21°C(70°F) => Fuzzy Operation for Heating

• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.


Operation Details

1) Fuzzy Operation for Cooling• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more

below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.Compressor ON Temp. => Setting Temp+0.5°C(33°F)

Compressor OFF Temp. => Setting Temp+0.5°C(33°F)



24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp+1°C(34°F)





• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.

2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more

below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.Compressor ON Temp. => Setting Temp+0.5°C(33°F)

Compressor OFF Temp. => Setting Temp+0.5°C(33°F)



24°C(76°F) ≤ Intake Air Temp < 26°C(78°F)=> Intake Air Temp+1°C(34°F)





• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as indehumidification operation.


Operation Details

3) Fuzzy Operation for Heating• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37°F) or more

above the setting temp, the compressor is turned off. When below the setting temp, the compressor isturned on.

Compressor ON Temp => Setting Temp + 2°C(36°F)Compressor OFF Temp => Setting Temp + 4°C(39°F)

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)


• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according tothe intake air temperature and the setting temperature.

n Airflow Speed Selection• The airflow speed of the indoor fan is set to high, medium, low, or chaos by the input of the airflow speed

selection key on the remote controller.

n On-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance starts to operate.

• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.

• If the appliance is operating at the time set by the timer, the operation continues.

n Off-Timer Operation• When the set time is reached after the time is input by the remote controller, the appliance stops operating.

• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.

• If the appliance is on pause at the time set by the timer, the pause continues.


Operation Details

n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation

is carried out according to the set time.

n Sleep Timer Operation• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in

appliance operation, the operation of the appliance stops.

• While the appliance is on pause, the sleep timer mode cannot be input.

• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°) again.

• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set tothe low.

• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set tothe medium.

n Chaos Swing Mode• By the Chaos Swing key input, the vane automatically operates with the Chaos Swing or they are fixed to the

desired direction.

n Chaos Natural Wind Mode• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-

flow mode is operated for 2~15 sec randomly by the Chaos Simulation.”

n Jet Cool Mode Operation (Outdoor unit C/O Model)• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.

• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.

• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F).

• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.

• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and thenoperated in order that the air outflow could reach further.

n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the

other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”


• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F).



n Auto Restarting Operation• When the power is restored after a sudden power failure while in appliance operation, the mode before the

power failure is kept on the memory and the appliance automatically operates in the mode on the memory.

• Operation Mode that is kept on the memory


Operation Details

- State of Operation ON/OFF

- Operation Mode/Setting Temp/Selected Airflow Speed

- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)

n Forced Operation (Outdoor unit C/O Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation button is on

the main unit of the appliance to operate the appliance in the standard conditions.

• Press the forced operation button, the forced operation is carried out.

• Press the forced operation button once again to stop operation.

• The forced operation is carried out in cooling mode with the setting temperature 22°C(72°F) and the highspeed of airflow.

n Forced Operation (Outdoor unit H/P Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation selection

switch is on the main unit of the appliance to operate the appliance in the standard conditions.



• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operationcondition is set according to the intake air temperature as follows.

24°C(76°F) ≤ Intake Air Temp => Cooling Mode Operation, 22°C(72°F), High Speed

21°C(70°F) ≤ Intake Air Temp < 24°C(76°F) => Dehumidification Operation, 23°C(74°F), High Speed

Intake Air Temp < 21°C(70°F) => Heating Mode Operation, 24°C(76°F), High Speed

n Test Operation Control• To check the condition of the installation when installing the appliance, the appliance is operated at cooling

mode, high speed of airflow, compressor-on for 18 min without controlling the room temperature.

• After supplying power to the main body, keep pressing the forced operation button for about 3 seconds.

• While in test operation, a key can be input by the remote controller. When a key (operation start/stop, operation mode selection, airflow speed selection, temperature control, JetCool) is input by the remote controller, the test operation is canceled and the appliance is operated accordingto the setting by the remote controller.

n Protection of the evaporator pipe from frosting• In the temperrature of the indoor pipe is below 0°C(32°F) after 7 minutes from starting the compressor, the

compressor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the tem-perature of the indoor pipe is over 7°C(45°F), the compressor and the outdoor fan are reoperated.

• Outdoor fan motor stops when indoor pipe temperature is blow 3°C(37°F) and restarts at the pipe temperatureabove 6°C(43°F) or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motorruns continuously at even below 3°C(37°F).


Operation Details

n Buzzer Sounding Operation• When the appliance-operation key is input by the remote controller, the short “beep-beep-” sounds.

• When the appliance-pause key is input by the remote controller, the long “beep—” sounds.

n Air Cleaner Operation• When an air cleaner function is selected during Air Conditioner operation

- Plasma air cleaner function will be operated while in any operation mode with selecting the function.- The function is to be stopped while it is operating with selecting the function.

• When an air cleaner function is selected during operation off- The function will be only operated.

• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to bestopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)will be operated again.


Dimensions

3. Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

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DE

: SE

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073S

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NU

093S

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NU

123S

E*2

AR

NU

153S

E*2

WM

odel

AR

NU

073S

E*2

AR

NU

093S

E*2

AR

NU

123S

E*2

AR

NU

153S

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HD

915

(36)

282

(11-

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169

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m(in

ch)]

915(

36)

282(11-1/8)

282(11-1/8)

169(

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567(

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51(2

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6)

53(2-1/16)

165(6-1/2)

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SA

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AC

Div

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ngle

woo

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liffs

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0763

2w

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a.co

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Dis

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: S8

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1. Functions ....................................................................................46


3. Dimensions .................................................................................54

ArtCoolGallery


Functions

1. Functions


• Maintains the room temperature in accordance with the Setting Temp.







Indoor Unit









ing defrosting.








On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.


Operation Details


DISPLAY1) High quality LCD remote controller suppliedOperation Indicator

• On while in appliance operation, off while in appliance pause

Timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled



Auto restart Indicator• On while auto restart mode, off while auto restart mode is canceled.





fan stop.




• While in compressor running, operating with the airflow speed set by the remote controller. While in compres-sor not running, operating with the low airflow speed regardless of the setting.



Operation Details



26°C(78°F) ≤ Intake Air Temp => 25°C

24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C








n Heating Mode Operation• When the intake air Temp. reaches Compressor OFF Temp., the compressor is turned off.

When the intake air Temp. reaches Compressor ON Temp., the compressor is turned on.

Themo ON Temp. => Setting Temp. +2˚C(36°F)

Themo OFF Temp. => Setting Temp.+4°C(39°F)

• While in compressor on, when above 38°C(100°F), it operates with setting airflow speed (while in sleep mode,with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(92°F) , when above35°C(94°F) , it operates with the low airflow speed.



defrost of the outdoor unit.

n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the

setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the compres-sor is turned on.





24°C(76°F) ≤ Intake Air Temp<26°C(78°F) => Intake Air Temp+1°C(34°F)





• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-


Operation Details

ature



• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.

24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling

21°C(70°F) ≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification




below the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, thecompressor is turned on.











2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below

the setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the com-pressor is turned on.




Operation Details

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.





Intake Air Temp < 18°C (64°F) => 18°C(64°F)




above the setting temp, the compressor is turned off. When below the setting temp, the compressor isturned on.

Compressor ON Temp => Setting Temp + 2°C(36°F)Compressor OFF Temp => Setting Temp + 4°C(39°F)

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according tothe intake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)


• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according tothe intake air temperature and the setting temperature.










Operation Details

n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation

is carried out according to the set time.




• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°F) again.




desired direction.





• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64°F)



n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the

other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”









Operation Details




n Forced Operation (Outdoor unit C/O Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation button is on

the main unit of the appliance to operate the appliance in the standard conditions.



• The forced operation is carried out in cooling mode with the setting temperature 22°C(72°F) and the highspeed of airflow.

n Forced Operation (Outdoor unit H/P Model)• To operate the appliance by force in case that the remote controller is lost, the forced operation selection

switch is on the main unit of the appliance to operate the appliance in the standard conditions.



• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operationcondition is set according to the intake air temperature as follows.

24°C(76°F) ≤ Intake Air Temp => Cooling Mode Operation, 22°C(72°F), High Speed

21°C(70°F) ≤ Intake Air Temp < 24°C(76°F) => Dehumidification Operation, 23°C(74°F), High Speed

Intake Air Temp < 21°C(70°F) => Heating Mode Operation, 24°C(76°F), High Speed

n Test Operation Control• To check the condition of the installation when installing the appliance, the appliance is operated at cooling

mode, high speed of airflow, compressor-on for 18 min without controlling the room temperature.

• After supplying power to the main body, keep pressing the forced operation button for about 3 seconds.

• While in test operation, a key can be input by the remote controller. When a key (operation start/stop, operation mode selection, airflow speed selection, temperature control, JetCool) is input by the remote controller, the test operation is canceled and the appliance is operated accordingto the setting by the remote controller.

n Protection of the evaporator pipe from frosting• In the temperrature of the indoor pipe is below 0°C(32°F) after 7 minutes from starting the compressor, the

compressor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the tem-perature of the indoor pipe is over 7°C(45°F), the compressor and the outdoor fan are reoperated.

• Outdoor fan motor stops when indoor pipe temperature is blow 3°C(37°F) and restarts at the pipe temperatureabove 6°C or after 90 seconds, if the pipe temperature does not rise to 6°C(43°F), outdoor fan motor runs con-tinuously at even below 3°C(37°F).


Operation Details

n Buzzer Sounding Operation• When the appliance-operation key is input by the remote controller, the short “beep-beep-” sounds.

• When the appliance-pause key is input by the remote controller, the long “beep—” sounds.






Dimensions

3. Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: SF

AR

T C

OO

L G

alle

ry

AR

NU

073S

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AR

NU

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NU

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AR

NU

073S

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AR

NU

093S

F*2

AR

NU

123S

F*2

HD

600

(23-

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600

(23-

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146

(5-1

1/16

)

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[Uni

t : m

m(in

ch)]

[Uni

t : m

m(in

ch)]

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

Nam

e

1

Air

disc

harg

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ill

2

Air

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1. Funtions ......................................................................................56


3. Dimensions .................................................................................60

Ceiling Concealed Duct Type (Low static)


1. FuntionsIndoor Unit








Auto Restart

Hot-start Control (Heating)• The indoor fan does not rotate until the evaporator piping

temperature reaches 25°C(76°F).

High head height Drain pump • A standard drain-head height of up to 700mm(27-9/16inch)is possible.





• High, Med, Low




Functions





n Cooling Mode Operation• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote controller

and the operation diagram is as following.




3 minutes 3 minutes

Selecting Selecting Selecting

fan speed fan speed fan speed

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN Low Low


Operation Details







Operation Details

n Heating Mode Operation The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.

Thermal

Outdoor fan

Indoor fan

4way valve

Setting Temperature(Thermal ON)

Setting Temperature +3°C(37°F)

(Thermal OFF)

Indoor unitHeat-Exchangertemperature

T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C(104°F)

T On

T Off

ON

ON

ON

ON

LowLowLowLowLow OffOffOff

ON

OFF

OFF

Low fan during 10sec

A

A

B

C

B


• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40°C(104°F), fan operates at low speed, when it becomes lower than 40°C(104°F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.

- To be operated "Low" except initial Hotstart operation

C

Chassis

Hotstart On T On

Hotstart Off T Off

Low temperature T LT

Setting Temperature T ST

High Static Low Static Convertible

BH BG BR

19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 19°C(66°F) 26°C(78°F) 26°C(78°F)




B1 B2 CE CF VE VJ


n Hot-Start Control

• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 30°C(86°F).

• The operation diagram is as following.

Operation Details

ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off

Indoor unitHeat-Exchanger

temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min

• Initial Hotstart On state

¿ Power Off ‡ On ¡ Operation Off ‡ On¬ Cooling operation ‡ Heating operation√ Defrost operation


3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: B1/

B2

Cei

ling

Con

ceal

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tic)

AR

NU

073B

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AR

NU

093B

1G2

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NU

123B

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153B

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183B

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383(15-1/16)

575(22-5/8)

161(6-5/16) 14(1/2)

154(6)

190(7-7/16)

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794

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1100

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1131

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72(4

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LG E

lect

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cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

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21

190(

7-7/

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65(2-1

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277(10-7/8)

216(8-1/2) 24(11/12)

1

3 4

2

5

6


1. Funtions ......................................................................................62


3. Dimensions .................................................................................66

Ceiling Concealed Duct Type (Built in)










Auto Restart


temperature reaches 25°C(76°F).






• High, Med, Low




Functions








Operation Details









3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details


Thermal

Outdoor fan

Indoor fan

4way valve



(Thermal OFF)


T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C(104°F)

T On

T Off

ON

ON

ON

ON


ON

OFF

OFF


A

A

B

C

B




C

Chassis

Hotstart On T On

Hotstart Off T Off




BH BG BR





B1 B2 CE CF VE VJ


n Hot-Start Control



Operation Details

ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off


temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min




3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: B3/

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Cei

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190(7-7/16)

618(24-5/16)

388(15-1/4)

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, HV

AC

Div

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n A

venu

e, E

ngle

woo

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liffs

, NJ

0763

2w

ww

.lgus

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ww

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hvac

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190(

7-7/

16)

65(2-1

/2)60(

2-3/8)

277(10-7/8)

216(8-1/2) 24(11/12)

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scha

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6A

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ctio

n

Num

ber

Des

crip

ition

Unit

size(

7k,9

k,12

k,18

k):ø

6.35

(1/4

)Un

it siz

e(24

k):ø

9.52

(3/8

)Un

it siz

e(7k

,9k,

12k,

18k)

:ø12

.7(1

/2)

Unit

size(

24k)

:ø15

.88(

5/8)

6

5

4

1 3

2

[Uni

t : m

m(in

ch)]

B3/

B4

Wit

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ion

Gri

lle&

Su

ctio

n C

anva

s W

ith

Su

ctio

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rille


1. Funtions ......................................................................................68


3. Dimensions .................................................................................72

Ceiling Concealed Duct Type (High Static)


Funtion









Auto Restart


temperature reaches 25°C(76°F)






• High, Med, Low





Operation Details










3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details


Thermal

Outdoor fan

Indoor fan

4way valve



(Thermal OFF)


T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C(104°F)

T On

T Off

ON

ON

ON

ON


ON

OFF

OFF


A

A

B

C

B




C

Chassis

Hotstart On T On

Hotstart Off T Off




BH BG BR





B1 B2 CE CF VE VJ


Operation Details

n Hot-Start Control



ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off


temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min




Dimensions

3. Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,LG

Ele

ctro

nics

US

A, H

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SIS

CO

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: BH

Cei

ling

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ceal

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Hig

h S

tatic

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AR

NU

073B

HA

2A

RN

U09

3BH

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AR

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123B

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183B

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tion

5

Air

disc

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e

6

Air

suct

ion

Num

ber

Des

crip

ition

[Uni

t : m

m(in

ch)]

Unit

size(

7k,9

k,12

k,18

k):ø

6.35

(1/4

)Un

it siz

e(24

k):ø

9.52

(3/8

)Un

it siz

e(7k

,9k,

12k,

18k)

:ø12

.7(1

/2)

Unit

size(

24k)

:ø15

.88(

5/8)

48(1-7/8)52(2-1/16)

165(6-7/13)

123(4-13/16)

140(5-9/16)

101(

3-15

/16) 31

(1-3

/13)

51(2

-1/1

6)

29(1

-1/8

)

70(2

-3/4

)

100(3-15/16)

260(

10-1

/4)

87(3

-7/1

6)

750(

29-1

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30(1

-3/1

6)47

(1-7

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450(17-11/16)

50(1-15/16)

355(14)

932(

36-1

1/16

)

133(5-1/4)

355(14)

450(17-11/16)

450(17-11/16)

260(10-1/4)

158(6-1/4)

75(2-15/16)

47(1

-7/8

)49(1

5/16

)

24(1

5/16

)

21(7

/8)

882(

34-3

/4)

65(2

-9/1

6)

108(

4-3/

13)

64(2

-1/2

)24

3(9-

9/16

)21

2(8-

3/8)

243(

9-9/

16)

119(

4-11

/16)

106(4-1/8)

127(5)

115(

4-1/

2)74

5(29

-3/8

)

20(3/4) 175(6-7/8)

3

2

5

1

4

6

114(

4-1/

2)

224(8-7/8)

60(2-3

/8)

R37.5

882(

34-3

/4)


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

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on.c

om

CH

AS

SIS

CO

DE

: BG

Cei

ling

Con

ceal

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h S

tatic

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AR

NU

283B

GA

2 A

RN

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423B

GA

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e

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ual

in

the

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ox.

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ded

in a

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ith th

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ns o

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le n

atio

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odes

.

261(

10-1

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32(1

-3/1

3)51

(2-1

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102(

4)

830(

32-1

1/16

)

29(1

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)75

(2-1

5/16

)

87(3-7/16)

1,23

0(48

-7/1

6)

1,18

2(46

-1/2

)

23(1

5/16

)

49(1

5/16

)

1,18

2(46

-5/8

)

158(6-1/4) 113(4-7/16)

298(11-11/16)

186(7-5/16)

232(

1-1/

4)24

3(9-

9/16

)24

3(9-

9/16

)23

2(1-

1/4)

232(

1-1/

4)

165(6-7/13)

53(2-1/16)47(1-7/8)

140(5-9/16)

122(4-13/16)

100(3-15/16)

87(3

-7/1

6)

450(17-11/16)

450(17-11/16)

50(1-15/16)

355(14)

108(

4-3/

13)

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

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ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

115(

4-1/

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043(

41)

20(3/4) 220(8-5/8)

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e

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ipe

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2

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pip

e co

nnec

tion

Unit s

ize(2

8k,3

6k,4

2k):ø

15.8

8(5/

8)

3

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in p

ipe

conn

ectio

n

4

Pow

er s

uppl

y co

nnec

tion

5

Air

disc

harg

e

6

Air

suct

ion

Num

ber

Des

crip

ition

[Uni

t : m

m(in

ch)]

32

5

1

4

6

152(

5-7/

8)

224(8-7/8)

60(2-3

/8)

ø100


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: BR

Cei

ling

Con

ceal

ed D

uct (

Hig

h S

tatic

)

AR

NU

483B

RA

2

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e

1. U

nit s

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d be

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alle

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ual

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the

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ox.

2. U

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ded

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r

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le n

atio

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odes

.

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e

1

Liqu

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ipe

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it siz

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2

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pip

e co

nnec

tion

Unit

size(

48k)

:ø15

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3

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n

4

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uppl

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5

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disc

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6

Air

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Num

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Des

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ition

[Uni

t : m

m(in

ch)]

221(8-3/4)123(4-13/16)

72(2-13/16)26(1

)83

(3-1

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101(

3-15

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90(3-9/16)

135(5-

5/16)

122(4-13/16)

144(5-11/16)

260(

10-1

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190(7

-7/16

)

115(

4-9/

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1,28

4(50

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1,23

0(48

-7/1

6)

477(18-3/4) 56(2-3/16)

590(23-3/16)

590(23-3/16)

118(

4-5/

8)

1,00

4(39

-9/1

6)

114(

4-7/

16)

1,23

0(48

-7/1

6)

50(1

-15/

16)

32(1-3/13)

168(6-5/8)

185(7-1/4)

241(

9-1/

2)24

1(9-

1/2)

279(

11)

279(

11)

380(15)

140(5-9/16)

215(

8-1/

2)

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

120(

4-3/

4)1,

092(

43)

25(1) 303(12)

3

2

1

5

6

4

198(

7-3/

4)

312(12-1/4)

60(2-3

/8)

R60


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: B8

Cei

ling

Con

ceal

ed D

uct (

Hig

h S

tatic

)

UR

NU

763B

8A2

UR

NU

963B

8A2

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e

1. U

nit s

houl

d be

inst

alle

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com

plia

nce

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ual

in

the

prod

uct b

ox.

2. U

nit s

hall

be g

roun

ded

in a

ccor

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e w

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cal r

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atio

ns o

r

app

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le n

atio

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4

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5

Air

disc

harg

e

6

Air

suct

ion

Des

crip

ition

[Uni

t : m

m(in

ch)]

Unit

size(

76k,

96k)

:ø9.

52(3

/8)

Unit

size(

76k)

:ø19

.05(

3/4)

Unit

size(

96k)

:ø22

.2(7

/8)

1,562

(61-7/

13)

1,622

(63-11

/13)

688(27)

688(27)

560(22) 64(2-7/13)

30(1-3/16)

1,22

0(48)

329(1

2-15/1

6)32

0(12

-5/8

)32

9(12-1

5/16)

318(12-7/13)

293(1

1-7/13

)

460(18-1/13)

460(

18-1

/13)

290(11-7/16) 161(6-3/8)

70(2

-3/4

)

120(

4-3/

4)

99(3

-7/8

)140

(5-9

/16)

440(17-3/8)20(3/4)

1,396

(54-15

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115(4

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)

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

3

2

1

4

6

5

1,56

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64(2-1/2)70(2-3/4)

60(2-3/8)

122(4-7/8)

358(

14)

109(4-1

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)

18(3/4)

58(2-1

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Nam

eN

umbe

r


1. Functions ....................................................................................77


3. Dimensions .................................................................................85

Wall Mountedd Type


Functions

1. Functions


• Maintains the room temperature in accordance with the Setting temperature







Indoor Unit








On/Off : Lights up during the system operation.Sleep Mode : Lights up during Sleep Mode Auto operation.Timer : Lights up during Timer operation.Defrost Mode : Lights up during Defrost Mode or Hot Start operation.Temperature : Indicate the setting temperature.



ing defrosting.








Operation Details


DISPLAY(1) High quality LCD remote controller supplied

Operation Indicator• On while in appliance operation, off while in appliance pause

Timer(on/off) and Sleep timer Indicator• On while in timer mode (on/off) and in sleep timer mode, off when timer mode is completed or canceled







fan stop.




• While in compressor running, operating with the airflow speed set by the remote controller. While in com-pressor not running, operating with the low airflow speed regardless of the setting.



Operation Details




24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp-1°C(34°F)








n Heating Mode Operation• When the intake air temp reaches +3°Cabove the setting temp, the compressor is turned off. When below the

setting temp, the compressor is turned on.

Thermo ON Temp. => Setting Temp. +2°C(36°F)

Thermo OFF Temp. => Setting Temp. +4°C(39°F)

• While in compressor on, when above 38°C(100°F) , it operates with or setting airflow speed (while in sleepmode, with the medium airflow speed).

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(92°F) , when above35°C(94°F) , it operates with the low airflow speed.



defrost the outdoor unit.

n Fuzzy Operation (Outdoor unit C/O Model)• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the set-

ting temp, the compressor is turned off. When 0.5°C (33°F) or more above the setting temp, the compressor isturned on.





Operation Details







• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-ature



• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and onlythe indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake airtemp at that moment as follows.

24°C(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling

21°C(70°F) ≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification











18°C(64°F) ≤ Intake Air Temp<22°C(72°F)=> Intake Air Temp




2) Fuzzy Operation for Dehumidification• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more





Operation Details










above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turnedon.

Compressor ON Temp => Setting Temp. +2°C(36°F)Compressor OFF Temp => Setting Temp. +4°C(39°F)

• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to theintake air temp at that time.20°C(68°F) ≤ Intake Air Temp => Intake Air Temp + 0.5°C(33°F)Intake Air Temp < 20°C(68°F) => 20°C(68°F)


• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to theintake air temperature and the setting temperature.










Operation Details

n Off-Timer <=> On-Timer Operation• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is

carried out according to the set time.




• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperatureincreases by 1°C(34°F) After another 30 min elapse, it increases by 1°C(34°F) again.




desired direction.







• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed atextremely high speed for 30 minutes setting the room temp. automatically to 18°C.

n Jet Cool Mode Operation (Outdoor unit H/P Model)• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other

mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.”




• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed atextremely high speed for 60 minutes setting the room temp. automatically to 30°C(86°F).






Operation Details



n Forced Operation • Operation procedures when the remote control can't be used.• The operation will be started if the power button is pressed.• If you want to stop operation, re-press the button.

• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times toindicate the forced operation.

n Test operation• During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-

perature and resets in 18±1 minutes.• During test operation, if remote controller signal is received, the unit operates as remote controller sets.

If you want to use this operation, Press and hold ON/OFF button 3~5 seconds, then the buzzer sound 1 "beep".• If you want to stop the operation, re-press the button.

n Protection of the evaporator pipe from frosting• If the indoor pipe temp is below 0°C(32F) in 7 min. after the compressor operates without any pause while in

cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoorevaporator pipe from frosting.

• When the indoor pipe temp is 7°C(45°F) or higher after 3 min. pause of the compressor, the compressor andthe outdoor fan is turned on according to the condition of the room temperature.

n Buzzer Sounding Operation• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.• When the appliance-pause key is input by the remote control, the long "beep—" sounds.• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the

forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that theremote control signal cannot be received.

Heat pump ModelCooling Model

Room Temp. ≥ 24°C(76°F) 21°C(70°F) ≤ Room Temp. < 24°C(76°F) Room Temp. < 21°C(70°F)

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor Fan Speed High High High High

Setting Temperature 22°C(72°F) 22°CC(72°F) 23°C(74°F) 24°C(76°F)


Operation Details






Dimensions

3. Dimensions

Low

er th

an 2

.3m

M

ore

than

200

mm

Hig

her t

han

eye-

leve

l

Mor

e th

an 1

00 m

m

Mor

e th

an 1

00 m

m

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: SE

PIP

E A

ND

DR

AIN

DIM

EN

SIO

N

PIP

ING

/WIR

ING

DIR

EC

TIO

NP

IPIN

G/W

IRIN

G

DIR

EC

TIO

N

Wal

l Mou

nted

AR

NU

07G

SE

*2A

RN

U09

GS

E*2

AR

NU

12G

SE

*2A

RN

U15

GS

E*2

WM

odel

AR

NU

07G

SE

*2A

RN

U09

GS

E*2

AR

NU

12G

SE

*2A

RN

U15

GS

E*2

HD

895

282

165

Not

e1.

Uni

t sho

uld

be in

stal

led

in c

ompl

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e w

ith th

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stal

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n m

anua

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in th

e pr

oduc

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Uni

t sha

ll be

gro

unde

d in

acc

orda

nce

with

the

loca

l reg

ulat

ions

or

a

pplic

able

nat

iona

l cod

es.

(uni

t : m

m)

567

265

Nam

e

1 2 3 4 5 6 7 8

Fron

t pan

elA

ir di

scha

rge

Air

suct

ion

Liqu

id p

ipe

Gas

pip

eD

rain

pip

eRi

ght s

ide

pipi

ng/w

iring

con

nect

ion

Left

side

pipi

ng/w

iring

con

nect

ion

Ø6.

35 F

lare

con

nect

ion

Ø12

.7 F

lare

con

nect

ion

Exte

rnal

dia

. Ø17

Num

ber

※ R

equi

red

spac

e(un

it:m

m)

Des

crip

ition

(uni

t : m

m)

PIP

ING

DIR

EC

TIO

N


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: S5

Wal

l Mou

nted

AR

NU

18G

S5*

2A

RN

U24

GS

5*2

WM

odel

AR

NU

18G

S5*

2A

RN

U24

GS

5*2

HD

1090

300

178

Not

e1.

Uni

t sho

uld

be in

stal

led

in c

ompl

ianc

e w

ith th

e in

stal

latio

n m

anua

l

in th

e pr

oduc

t box

.2.

Uni

t sha

ll be

gro

unde

d in

acc

orda

nce

with

the

loca

l reg

ulat

ions

or

a

pplic

able

nat

iona

l cod

es.

(uni

t : m

m)

281

804

Fron

t pan

elA

ir di

scha

rge

Air

suct

ion

Liqu

id p

ipe

Gas

pip

eD

rain

pip

eRi

ght s

ide

pipi

ng/w

iring

con

nect

ion

Left

side

pipi

ng/w

iring

con

nect

ion

Ø6.

35 F

lare

con

nect

ion

Ø12

.7 F

lare

con

nect

ion

Exte

rnal

dia

. Ø17

PIP

E A

ND

DR

AIN

DIM

EN

SIO

N

PIP

ING

/WIR

ING

DIR

EC

TIO

NP

IPIN

G/W

IRIN

G

DIR

EC

TIO

N

PIP

ING

DIR

EC

TIO

N

Low

er th

an 2

.3m

M

ore

than

200

mm

Hig

her t

han

eye-

leve

l

Mor

e th

an 1

00 m

m

Mor

e th

an 1

00 m

m

Nam

e

1 2 3 4 5 6 7 8

Num

ber

※ R

equi

red

spac

e(un

it:m

m)

Des

crip

ition

(uni

t : m

m)


1. Funtions ......................................................................................88


3. Dimensions .................................................................................92

Ceiling & Floor Ceiling Suspended


1. Function

Indoor Unit








Auto Restart

Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F).






• High, Med, Low




Function



Operation Details














3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details


Thermal

Outdoor fan

Indoor fan

4way valve



(Thermal OFF)


T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C(104°F)

T On

T Off

ON

ON

ON

ON


ON

OFF

OFF


A

A

B

C

B




C

Chassis

Hotstart On T On

Hotstart Off T Off




BH BG BR





B1 B2 CE CF VE VJ


Operation Details

n Hot-Start Control



ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off


temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min




3. Dimensions

Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: VE

Cei

ling

& F

loor

AR

NU

09G

VE

A2

AR

NU

12G

VE

A2

Not

e1.

Uni

t sho

uld

be in

stal

led

in c

ompl

ianc

e w

ith th

e in

stal

latio

n m

anua

l

in th

e pr

oduc

t box

.2.

Uni

t sha

ll be

gro

unde

d in

acc

orda

nce

with

the

loca

l reg

ulat

ions

or

a

pplic

able

nat

iona

l cod

es.

WM

odel

AR

NU

09G

VE

A2

AR

NU

12G

VE

A2

HD

900

490

200

(uni

t : m

m)

587

273

※ R

equi

red

spac

e(un

it:m

m)

Nam

e1 2 3 4 5 6 7 8 9 10

Liqu

id p

ipe

Gas

pip

e

Suc

tion

gille

Dis

char

ge g

rille

Sus

pens

ion

brac

ket

Rig

ht s

ide

drai

n ho

se h

ole

Left

side

dra

in h

ose

hole

Wiri

ng c

onne

ctio

n

Pip

ing

conn

ectio

n

Sign

al re

ceive

r & O

pera

tion

indi

cato

r

ø6.3

5 Fl

are

conn

ectio

nø1

2.7

Flar

e co

nnec

tion

Num

ber

Des

crip

ition

(uni

t : m

m)

Slit

hol

eS

lit h

ole

Mor

e th

an 2

00m

m

Mor

e th

an 5

0mm

Mor

e th

an 2

00m

m

Mor

e th

an 2

00m

m

Mor

e th

an 5

0mm

Mor

e th

an 2

00m

m


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

CH

AS

SIS

CO

DE

: VJ

Cei

ling

Sus

pend

ed

AR

NU

18G

VJA

2A

RN

U24

GV

JA2

Not

e1.

Uni

t sho

uld

be in

stal

led

in c

ompl

ianc

e w

ith th

e in

stal

latio

n m

anua

l

in th

e pr

oduc

t box

.2.

Uni

t sha

ll be

gro

unde

d in

acc

orda

nce

with

the

loca

l reg

ulat

ions

or

a

pplic

able

nat

iona

l cod

es.

WM

odel

AR

NU

18G

VJA

2A

RN

U24

GV

JA2

HD

950

650

220

(uni

t : m

m)

※ R

equi

red

spac

e(un

it:m

m)

Nam

e1 2 3 4 5 6 7 8 9 10 11

Liqu

id p

ipe

Gas

pip

e

Suc

tion

gille

Dis

char

ge g

rille

Sus

pens

ion

brac

ket

Rig

ht s

ide

drai

n ho

se h

ole

Left

side

dra

in h

ose

hole

Wiri

ng c

onne

ctio

n

Pip

ing

conn

ectio

n

Rig

ht s

ide

drai

n pi

pe c

onne

ctio

n

Left

side

dra

in p

ipe

conn

ectio

n

ø6.3

5 Fl

are

conn

ectio

nø1

2.7

Flar

e co

nnec

tion

Num

ber

Des

crip

ition

(uni

t : m

m)

Slit

hol

eS

lit h

ole

Slit

hol

eS

lit h

ole

Mor

e th

an 7

00m

mM

ore

than

300

mm

Mor

e th

an 7

00m


1. Function ......................................................................................95


3. Dimensions .................................................................................99

Floor Standing Type


1. Function

Indoor Unit








Auto Restart

Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F).






• High, Med, Low




Function


Operation Details















3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details


Thermal

Outdoor fan

Indoor fan

4way valve



(Thermal OFF)


T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C(104°F)

T On

T Off

ON

ON

ON

ON


ON

OFF

OFF


A

A

B

C

B




C

Chassis

Hotstart On T On

Hotstart Off T Off




BH BG BR





B1 B2 CE CF VE VJ


Operation Details

n Hot-Start Control



ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off


temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min




Dimensions

3. Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: CE

Flo

or S

tand

ing

AR

NU

073C

EA

2A

RN

U09

3CE

A2

AR

NU

123C

EA

2A

RN

U15

3CE

A2

AR

NU

073C

EU

2A

RN

U09

3CE

U2

AR

NU

123C

EU

2A

RN

U15

3CE

U2

Not

e1.

Uni

t sho

uld

be in

stal

led

in c

ompl

ianc

e w

ith th

e in

stal

latio

n m

anua

l

in th

e pr

oduc

t box

.

2. U

nit s

hall

be g

roun

ded

in a

ccor

danc

e w

ith th

e lo

cal r

egul

atio

ns o

r

app

licab

le n

atio

nal c

odes

.

<W

ith C

ase>

<W

ithou

t Cas

e>

1067

(42)

1067

(42)

148.

3(5

-13/

16)

148.

3(5

-13/

16)

49(15/16)

70(2-3/4)635(25)

203(

7-15

/16)

978(

38-1

/2)

794(

31-5

/16)

639(31-1/4)

13(1

/2) 20.4(3/4) 6.28

(1/4)

190(

7-7/

16)

161(

6-5/

16)

14(1

/2)

WM

odel

AR

NU

073C

EA

2A

RN

U09

3CE

A2

AR

NU

123C

EA

2A

RN

U15

3CE

A2

HD

1067

(42)

635

(25)

203

(7-1

5/16

)

AR

NU

073C

EU

2A

RN

U09

3CE

U2

AR

NU

123C

EU

2A

RN

U15

3CE

U2

978

(38-

1/2)

639

(31-

1/4)

190

(7-7

/16)

[Uni

t : m

m(in

ch)]

[Uni

t : m

m(in

ch)]

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

1

2

Nam

e

1

Air

disc

harg

e gr

ill

2

Air

suct

ion

grill

Num

ber

Des

crip

ition


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: CF

Flo

or S

tand

ing

AR

NU

183C

FA2

AR

NU

243C

FA2

AR

NU

183C

FU2

AR

NU

243C

FU2

Not

e

1. U

nit s

houl

d be

inst

alle

d in

com

plia

nce

with

the

inst

alla

tion

man

ual

in

the

prod

uct b

ox.

2. U

nit s

hall

be g

roun

ded

in a

ccor

danc

e w

ith th

e lo

cal r

egul

atio

ns o

r

app

licab

le n

atio

nal c

odes

.

1

2<

With

Cas

e>

<W

ithou

t Cas

e>

203(7-15/16)

1345

(52-

15/1

6)

635(25)70(2-3/4)

148.

3(5

-13/

16)

1048

.4(4

1-1/

4)

49.5(1-15/16)

148.

3(5

-13/

16)

190(

7-7/

16)

161(

6-5/

16)

14(1

/2)

1256

(49-

7/16

1098

(43-

1/4)

1072

(42-

3/16

)10

9.8(

4-5/

16)

30(1

-3/1

6)

81.4(3-3/16) 145(5-11/16)

70(2-3/4)

21.4(1-3/16)639(31-1/4)

WM

odel

AR

NU

183C

FA2

AR

NU

243C

FA2

HD

1345

(52-

15/1

6)63

5(2

5)20

3(7

-15/

16)

AR

NU

183C

FU

2A

RN

U24

3CF

U2

1256

(49-

7/16

)63

9(3

1-1/

4)19

0(7

-7/1

6)

[Uni

t : m

m(in

ch)]

203(

7-15

/16)

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

Nam

e

1

Air

disc

harg

e gr

ill

2

Air

suct

ion

grill

Num

ber

Des

crip

ition

(uni

t : m

m)


1. Funtions ....................................................................................102

2. Operation Details......................................................................103

3. Dimensions ...............................................................................107

Vertical Air Handling Unit


Funtions









Auto Restart

Hot-start Control (Heating) • The indoor fan does not rotate until the evaporator pipingtemperature reaches 25°C(76°F)





• High, Med, Low



• Both the indoor and outdoor fan stops during defrosting.• Hot start after defrost ends.• If the electric heater has been installed, indoor fan continuous

will be.


Operation Details










3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details


Thermal

Outdoor fan

Indoor fan

4way valve


Setting Temperature +3C(37F)

(Thermal OFF)


T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40C(104F)

T On

T Off

ON

ON

ON

ON


ON

OFF

OFF


A

A

B

C

B


• Compressor-off interval : - While the indoor Heat-Exchanger temperature is higher than 40C(104F), fan operates at low speed, when it becomes lower than 40C(104F) fan stops. - For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.


C

Chassis

Hotstart On T On

Hotstart Off T Off



Vertical Air Handling Unit

NJ NK

19°C(66°F) 19°C(66°F)

22°C(72°F) 22°C(72°F)

25°C(76°F) 25°C(76°F)

27°C(80°F) 27°C(80°F)


Operation Details

n Hot-Start Control

• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 22℃(71.6℉).


ON ON

Off Off LowLow

1 min

Hotstart On

Hotstart Off


temperature

Setting fanspeed

Setting fanspeed

ThermalOutdoor fan

Indoor fan

4way Valve ON

1 min



Chassis

Hotstart On T On

Hotstart Off T Off




BH BG BR





B1 B2 CE CF VE VJ


Operation Details

n Heater Operation

• The unit will operate according to the setting temperature and the indoor unit Heat-Exchanger temperature.

• Heater operation diagram is shown as following.

Heater 2Heater 1

45℃ (113℉)

30℃ (86℉)

42℃ (108℉)

28℃ (82℉)


Setting temperature (A)

A-1℃ (34℉)

A-2℃ (36℉)

ON ON

OFF OFF

ON ON

Heater ON Heater ON Heater OFF


Dimensions

3. Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,LG

Ele

ctro

nics

US

A, H

VA

C D

ivis

ion

1000

Syl

van

Ave

nue,

Eng

lew

ood

Clif

fs, N

J 07

632

ww

w.lg

usa.

com

/ w

ww

.lghv

ac.c

om64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: NJ

Ver

tical

Air

Han

dlin

g U

nit

AR

NU

183N

JA2

AR

NU

243N

JA2

AR

NU

303N

JA2

AR

NU

363N

JA2

Not

e

1. U

nit s

houl

d be

inst

alle

d in

com

plia

nce

with

the

inst

alla

tion

man

ual

in

the

prod

uct b

ox.

2. U

nit s

hall

be g

roun

ded

in a

ccor

danc

e w

ith th

e lo

cal r

egul

atio

ns o

r

app

licab

le n

atio

nal c

odes

.

Nam

e

1

Liqu

id p

ipe

conn

ectio

n

2

Gas

pip

e co

nnec

tion

3

Dra

in p

ipe

conn

ectio

n

4

Pow

er s

uppl

y co

nnec

tion

5

Air d

isch

arge

6

Air s

uctio

n

Num

ber

Des

crip

ition

[Uni

t : m

m(in

ch)]

Uni

t siz

e(18

k):ø

6.35

(1/4

)U

nit s

ize(

24k,

30k)

:ø9.

52(3

/8)

Unit

size(

18k)

:ø12

.7(1

/2)

Unit

size(

24k,

30k)

:ø15

.88(

5/8)

5

41(

1-5/

8)40

331(13)

40(1

-9/1

6)

364(

14-5

/16)

1236

(48-

5/8)65

(2-9

/16)

117.

5(4-

5/8)

254(10)

543(

21-3

/8)

457(18)

432(17)

308(

12-1

/8)40

(1-9

/16)

46(1

-13/

16)

1

2

6

3

4


Dimensions

76, S

eong

san-

dong

, Cha

ngw

on C

ity, G

yeon

gnam

,64

1-71

3, K

orea

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: NK

Ver

tical

Air

Han

dlin

g U

nit

AR

NU

423N

KA

2A

RN

U48

3NK

A2

AR

NU

543N

KA

2

Not

e

1. U

nit s

houl

d be

inst

alle

d in

com

plia

nce

with

the

inst

alla

tion

man

ual

in

the

prod

uct b

ox.

2. U

nit s

hall

be g

roun

ded

in a

ccor

danc

e w

ith th

e lo

cal r

egul

atio

ns o

r

app

licab

le n

atio

nal c

odes

.

LG E

lect

roni

cs U

SA

, HV

AC

Div

isio

n10

00 S

ylva

n A

venu

e, E

ngle

woo

d C

liffs

, NJ

0763

2w

ww

.lgus

a.co

m /

ww

w.lg

hvac

.com

635(25)

308

(12-

1/8)

40(1

-9/1

6)

41(1

-5/8

)40

(1-9

/16)

40(1

-9/1

6)

118

(4-5

/8)

362

(14-

1/4)

39(1

-9/1

6)65

(2-9

/16)

1400

(55-

1/8)

1418

(55-

13/1

6)

508(20)

430(16-15/16)

49(1

-15/

16)

540

(21-

1/4)

55(2-3/16)

52(2-1/16)

610(24)

Nam

e

1

Liqu

id p

ipe

conn

ectio

n Un

it size

(28k

,36k

,42k

):ø9.

52(3

/8)

2

Gas

pip

e co

nnec

tion

Unit s

ize(2

8k,3

6k,4

2k):ø

15.8

8(5/

8)

3

Dra

in p

ipe

conn

ectio

n

4

Pow

er s

uppl

y co

nnec

tion

5

Air

disc

harg

e

6

Air

suct

ion

Num

ber

Des

crip

ition

[Uni

t : m

m(in

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Part 3Trouble shooting guide


Self-diagnosis function ...................................................................111

Trouble shooting guide


Self-diagnosis function


Self-Diagnosis Function

Error Indicator• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of

outdoor unit control board as shown in the table.• If more than two troubles occur simultaneously, lower number of error code is first displayed.• After error occurrence, if error is released, error LED is also released simultaneously.

Error Display1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.Ex) 211 : No.21 error of master unit

213 : No.21 error of slave2011 ’ 051 : No.105 error of master unit

Display Title Cause of Error

Indo

or u

nit r

elate

d er

ror

0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short

0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short

0 3 -Transmission error : wired remote controller↔ indoor unit

Failing to receive wired remote controller signal in indoor unit PCB

0 4 - Drain pump Malfunction of drain pump

0 5 - Transmission error : outdoor unit ↔ indoor unit Failing to receive outdoor unit signal in indoor unit PCB

0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short

0 7 - Different operation mode Operation mode between indoor unit and outdoor unit is different

0 9 - Serial No.In case when the serial number marked onEEPROM of Indoor unit is 0 orFFFFFF

1 0 - Poor fan motor operationDisconnecting the fan motor connector/Failure of indoor fan motor lock

Air temperature sensor of indoor unit is open or short



** In case the value is more than 100kΩ (open) or less than 100Ω (short), Error occurs

Refer: Resistance value maybe change according to temperature of temp sensor,It shows according to criteria of current temperature(±5% margin) ‘ NormalAir temp sensor: 10°C(50°F) = 20.7kΩ : 25°C(76°F)= 10kΩ : 50°C(122°F)= 3.4kΩPipe temp sensor: 10°C(50°F) = 10kΩ : 25°C(76°F)= 5kΩ : 50°C(122°F)= 1.8kΩ

n Error diagnosis and countermeasure flow chart

Is sensor properly connected to PCB?

Is the resistance value of sensor normal?*

Connect properly to PCB

Change the sensor

Change the PCB

Yes

Yes

No

No

Measure the resistance of outlet pipe temp sensor.

CN_PIPE/OUT: Pipe outlet temp sensor

CN_ROOM: Indoor air temp sensorCN_PIPE/IN: Pipe inlet temp sensor

ErrorNo.

Error Type Error Point Main Reasons

01 Indoor unit air sensor errorIndoor unit sensor is

open/short

1. Indoor unit PCB wrong connection2. Indoor unit PCB failure3. Sensor problem (main reason)

02 Indoor unit pipe inlet sensor error

06 Indoor unit pipe outlet sensor error

<Standard Indoor Unit>

<Fresh Air Intake Unit>


* If there is no remote controller to replace : Use another unitʼs remote controller doing well

** Check cable : Contact failure of connected portion or extension of cable are main causeCheck any surrounded noise ( check the distance with main power cable) ‘ make safe distance from the devices generate electromagnetic wave

*** After replacing indoor unit PCB, do Auto Addressing & input unitʼs address if connected to central controller.(All the indoor units connected should be turned on before Auto Addressing

03 No transmission between cabledremote controller & indoor unit

ErrorNo.


The remote controllerdid not receive the sig-nal from indoor unitduring specific time

1. Remote controller fault

2. Indoor unit PCB fault

3. Connector fault, Wrong connection

4. transmission cable problem


CN-REMO : Remote controller connection

The PCB can differ from model to model.Check from the right source.

Checking transmission cable connection status

Does the error happens again if the remote

controller is replaced?*

Does the error occurred when the cable of remote

controller is replaced?

Replace cabled remote controller

Check connection & transmission cable **

Replace indoor unit PCB ***

Yes

Yes

No

No



1. Drain pump/float switch fault

04 Drain pump error2. Improper drain pipe location, clog-

ging of drain pipe

3. Indoor unit PCB fault

ErrorNo.


Error diagnosis and countermeasure flow chart

Float switch is open due torising of condensate waterlevel because of drainpump fault or drain pipeclogging

Is the drain pan filled half with condensate water? (half level of

float switch)*

Is drain pump working?(Sound/drain noise/

contact etc.)

Replace float switch

Replace Indoor PCB or reconnect the connector

Yes

Yes

No

No Is Float switch short On measuring its

resistance?

No

Yes

Drain pump blocked byforeign particles?

Yes

In indoor unit PCB Does the terminal voltage

for drain pump has 208/230V output?**

Replace indoor unit PCB

Replace Drain Pump

Yes

Remove it & clean the pump

No

* If the float goes up higher than a half of float switch then the circuit is open & the unit is stopped automatically.



*** Indoor PCB drain pump connector

(Check input of 208/230V)

(Marked as CN-DPUMP)

float

A:Point to check rotating

Float switch Housing (CN-FLOAT)

Float switch connector

[***] Standard of drain pipe head height / slope

MAX 450

700mm(27-9/16inch)



1. Auto addressing is not done2. transmission cable is not connected3. Short circuit of transmission cable4. Indoor unit transmission circuit fault

05 5. Outdoor unit transmission circuit fault 6. Not enough distance between power and trans-

mission cable?

ErrorNo.


No signal transmissionbetween indoor & outdoorunits.

Indoor & Outdoor unittransmission error

Does all the IDUs show same error code CH05?

Is outdoor PCB LEDblinking?

Yes

Yes

No

Is main circuit breaker off?No

Check the main power supply at the ODU

terminal block?

Improper connection of power supply cable

Main power supply problem

Yes

No

Yes

No

Outdoor PCB faultReplace after checking

Re connect transmission cableNo

Yes

Indoor PCB faultReplace after checking

* (Note1) Transmission from IDU is normal if voltage fluctuation(-9V ~ +9V) exists when checking DC voltage of communication terminal between IDU and ODU

Is total number of indoor units connected displayed

after auto addressing?

No

END

* If the DC voltage between transmission terminal A, B of indoor unit is fluctuate within (-9V~+9V) then transmission from outdoor unit is normal

Check the insulation of inverter/ constant compressor and replace if required

Check the capacity of main circuit breaker and replace if required

If all ok,Turn on main circuit breaker

Replace outdoor PCB afterchecking

Replace TRANS after checking

Replace the PCB of indoor unitdisplayed error

Re-connect after check thetransmission cable of indoorunit displayed error**

Check if the transmission cable is properly connected to indoor / outdoor terminal block?*




06Refer to CH02

ErrorNo.


Indoor unit outlet pipetemperature sensor openor short

Indoor unit outlet pipetemperature sensorerror

071. Indoor units are in different mode2. PCB fault3. cabled remote controller faultj Checking ch07 methodIDU doesnʼt operate as Operation mode is flickering at IDU wired remote controller and IDU display window.

ErrorNo.


The Indoor units startedlater are operated in dif-ferent mode from earlierone.

All Indoor units are notrunning in same mode


* Check mode selection setting of wired remote controller.

** Outdoor main PCB dip switch no.5 (Cooling) or no.6 (heating) is in On, different mode operation error

may occur because the operation mode is fixed by dip switch setting.

© Dip switch Setting ©

*** Dissolution method CH07 with remote controller

1) Error removal method : Turn off remote controller by pressing the On/Off button on the cabled remote controller. The error code will be removed automatically after few seconds.With cableless remote controller: Turn off indoor unit, and then turn on by changing the operationmode. The error will disappear.

Is operation mode of outdoor & Indoor units

same?

Adjust outdoor main PCBdip switch setting *

Yes

No

END

Does error code disappear

after set operation mode same?**

Replace Indoor PCB***No

Yes

1 2 3 4 5 6 7

ON

1 2 3 4 5 6 7

ON

1 2 3 4 5 6 7 8 9 10 11 12 13 14

1 2 3 4 5 6 7

ON

1 2 3 4 5 6 7

ON

1 2 3 4 5 6 7 8 9 10 11 12 13 14



091. Error developed in transmission between the

micro- processor and the EEPROM on the sur-face of the PCB.

2. ERROR due to the EEPROM damage

ErrorNo.


Indoor unit EEPROMerror


**** After replacing the indoor unit PCB, make sure to be done to do Auto addressing and input the address of central control

***** If ODU Dry Contact function is set , different mode operation error may be occurred because the operation mode is fixed.

- Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control



10Indoor unit BLDC fan motorfailure

ErrorNo.


Indoor BLDC fan motorfeedback signal is absent(for 50 sec.)

1. Motor connector connection fault2. Indoor PCB fault3. Motor fault


Is connector connection proper?

Yes

No Connect properly

Is fan motor normal?*

Replace indoor unit fan motor

* It is normal when check hall sensor of indoor fan motor as shown below

Yes

No

k

Replace indoor unit PCB **

<Checking connection state of fan motor connector>

1 4 5 6 7

1

5

6

7

4

4

4

4

Each termainl with the tester

Tester

TH chassis

hundreds kΩ hundreds kΩ

hundreds kΩ hundreds kΩ

+ - TD chassis

Normal resistance(±10%)

** Replace the indoor unit PCB, and then make sure to do Auto addressing and input the address of central control (Notice: The connection of motor connector to PCB should be done under no power supplying to PCB)


P/NO : MFL50459505 NOVEMBER, 2010

system indoor unit r410a service manual r410a

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