system indoor unit r410a service manual...

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 ©2008 LG Electronics. Inc. All right reserved.Only for training and service purposes LGE Internal Use Only

Air Conditioner Service Manual

TABLE OF CONTENTS

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

Part 1 General Information .............................................................................................................10

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

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

Nomenclature .............................................................................................................................15

Part 2 Indoor Units.......................................................................................................................7Ceiling Mounted Cassette Type (1 way).........................................................................................8Ceiling Mounted Cassette Type (2 way).......................................................................................13Ceiling Mounted Cassette Type (4 way)(1) ..................................................................................20Ceiling Mounted Cassette Type (4 way)(2) ..................................................................................23Art Cool Type(Mirror)....................................................................................................................30Art Cool Type(Gallery) .................................................................................................................41Ceiling Concealed Duct Type (Low static)....................................................................................51Ceiling Concealed Duct Type (Built in).........................................................................................57Ceiling Concealed Duct Type (High static)...................................................................................63Wall Mounted Type.......................................................................................................................72Ceiling & Floor Ceiling Suspended ..............................................................................................83Floor Standing Type .....................................................................................................................90

Part 3 Trouble shooting guide .................................................................................97


Part 1 General Information

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

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

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

Model Names


1. Model Names

SEWall Mounted(General) S5

SEMirror

S3

SF

1 Way TJ

2 Way TL

TE

4 Way TP

TN

TM

BH

BGHigh Static BR

B8

B1Low Static

B2

B3

B4

Ceiling & Floor VE

Ceiling Suspended VJ

CEWith Case

CF

CE

CF

Capacity(Btu/h(kW))Category Chassis

Name 7k 9k 12k 15k 18k 24k 28k 36k 42k 48k 76k 96k(2.2) (2.8) (3.6) (4.5) (5.6) (7.1) (8.2) (10.6) (12.3) (14.1) (22.4) (28)

Ceiling Concealed

Duct

Built In

ART CoolGallery

FloorStanding

WithoutCase

Ceiling

Cassette

ART COOL

*ART COOL- B: Blue, M:Metal, D:Wood, R:Mirror, W:White Wood, V:Silver, E:Red, G:Gold, 1: Kiss (Photo changeable)*Wall Mounted- A: Basic, L:Plasma*Ceiling Cassette- A: Basic, C:Plasma

ARNU07GSE*2

ARNU09GSE*2

ARNU12GSE*2

ARNU15GSE*2

ARNU07GTJ*2

ARNU09GTJ*2

ARNU12GTJ*2

ARNU18GTL*2

ARNU24GTL*2

ARNU07GTE*2

ARNU09GTE*2

ARNU12GTE*2

ARNU15GTE*2

ARNU18GTE*2

ARNU24GTP*2

ARNU28GTP*2

ARNU07GBHA2

ARNU09GBHA2

ARNU12GBHA2

ARNU15GBHA2

ARNU18GBHA2

ARNU24GBHA2

ARNU07GB1G2

ARNU09GB1G2

ARNU12GB1G2

ARNU15GB1G2

ARNU07GB3G2

ARNU09GB3G2

ARNU12GB3G2

ARNU15GB3G2

ARNU07GCEA2

ARNU09GCEA2

ARNU12GCEA2

ARNU15GCEA2

ARNU07GCEU2

ARNU09GCEU2

ARNU12GCEU2

ARNU15GCEU2

ARNU09GVEA2

ARNU12GVEA2

ARNU18GVJA2

ARNU24GVJA2

ARNU18GCFA2

ARNU24GCFA2

ARNU18GCFU2

ARNU24GCFU2

ARNU28GBGA2

ARNU36GBGA2

ARNU42GBGA2

ARNU36GTN*2

ARNU48GBRA2

ARNU42GTM*2

ARNU48GTM*2

URNU76GB8A2

URNU96GB8A2

ARNU18GB2G2

ARNU24GB2G2

ARNU18GB4G2

ARNU24GB4G2

ARNU07GSE*2

ARNU09GSE*2

ARNU12GSE*2

ARNU15GSE*2

ARNU07GSF*2

ARNU09GSF*2

ARNU12GSF*2

ARNU18GS5*2

ARNU24GS5*2

ARNU18GS3*2

ARNU24GS3*2

External Appearance


2. External Appearance

Wall Mounted

ART COOL Mirror

Ceiling Cassette- 1Way

Ceiling Cassette- 4Way

Ceiling & Floor

Ceiling Suspended

ARNU07GTJ*2 ARNU09GTJ*2ARNU12GTJ*2

Ceiling Cassette -2WayARNU18GTL*2ARNU24GTL*2

ARNU07GTE*2ARNU09GTE*2ARNU12GTE*2ARNU15GTE*2ARNU18GTE*2

ARNU24GTP*2 ARNU28GTP*2ARNU36GTN*2ARNU42GTM*2ARNU48GTM*2

Ceiling Concealed Duct - Low StaticARNU07GB1G2 ARNU09GB1G2ARNU12GB1G2

ARNU15GB1G2ARNU18GB2G2ARNU24GB2G2

ARNU07GSE*2 ARNU09GSE*2ARNU12GSE*2

ARNU15GSE*2ARNU18GS5*2 ARNU24GS5*2

ARNU07GSE*2 ARNU09GSE*2ARNU12GSE*2 ARNU15GSE*2ARNU18GS3*2ARNU24GS3*2

ARNU09GVEA2ARNU12GVEA2

ARNU18GVJA2ARNU24GVJA2

Floor Standing With caseARNU07GCEA2ARNU09GCEA2ARNU12GCEA2ARNU15GCEA2ARNU18GCFA2ARNU24GCFA2

Without caseARNU07GCEU2ARNU09GCEU2ARNU12GCEU2ARNU15GCEU2ARNU18GCFU2ARNU24GCFU2

Ceiling Concealed Duct - High StaticARNU07GBHA2ARNU09GBHA2ARNU12GBHA2ARNU15GBHA2ARNU18GBHA2ARNU24GBHA2ARNU28GBGA2

ARNU36GBGA2ARNU42GBGA2ARNU48GBRA2URNU76GB8A2URNU96GB8A2

Ceiling Concealed Duct – Built-inARNU07GB3G2 ARNU09GB3G2ARNU12GB3G2

ARNU15GB3G2ARNU18GB4G2ARNU24GB4G2

* A:Basic, L:Plasma

ART COOL GalleryARNU07GSF*2 ARNU09GSF*2ARNU12GSF*2

* E:Red V:Silver G:Gold 1: Kiss (Photo changeable)

* A:Basic, C:Plasma

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

S3: * B : BlueM : Metal D : WoodR : MirrorW : White Wood

SE: * R:MirrorV:SilverB : Blue

Nomenclature


3. Nomenclature

ARN U G07 ATJ 2

Serial Number

Chassis Name

Electrical Ratings

1:1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz6:1Ø, 220 ~ 240V, 50Hz 7: 1Ø, 100V, 50/60HzG:1Ø, 220 ~ 240V, 50Hz / 220V 60Hz

Total Cooling Capacity in Btu/h EX) 5,000 Btu/h'05' 18,000 Btu/h'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 ART COOL Type Panel ColorB:Blue D:Wood M:Metal R:Mirror W:White Wood V: Silver E:Red G:Gold 1: Kiss (Photo changeable)


Part 2 Indoor Units

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

Art Cool SeriesART COOL Miror .............................................................30ART COOL Gallery ..........................................................41

Ceiling Concealed DuctLow Static ........................................................................51Built In ..............................................................................57High Static........................................................................63

Wall Mounted(General)Wall Mounted ...................................................................72

Ceiling & FloorCeiling & Floor Ceiling Suspended...........................................................83

Floor StandingFloor Standing..................................................................90


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

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

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

Ceiling Mounted Cassette Type (1Way)


Specification

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.

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 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

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

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.

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)

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

3 minutes 3 minutes

Selected Selected SelectedSpeed Speed Speed

INDOOR FAN Low Low


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

Hot-start Control

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

25 °C

27 °C

35 °C30 °C

22 °C

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(39)°C

25°C22(20)°C

36(42)°C

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

4

2

1

3

860

32.8

410344.4

961.

216

.519

.1

50

83

3630

242.5

173151

10056

8313

8

131

11016.4.19

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480

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1. Functions ....................................................................................14


3. Dimensions .................................................................................17

Ceiling Mounted Cassette Type (2Way)


1. Functions

Indoor Unit









Auto Restart

















Functions


2. Operation Detail







Operation Detail









3 minutes 3 minutes


INDOOR FAN Low Low



Hot-start Control


25 °C

27 °C

35 °C30 °C

22 °C

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(39)°C

25°C22(20)°C

36(42)°C

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

830

AB

47.9

275

550

69.588

9.2

1050

640

28.5

4

2

1

3

TL

A B

225

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1. Functions ....................................................................................19


3. Dimensions .................................................................................22

Ceiling Mounted Cassette Type (4Way) (1)


1. Functions

Indoor Unit









Auto Restart








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






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



Hot-start Control


25 °C

27 °C

35 °C30 °C

22 °C

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(39)°C

25°C22(20)°C

36(42)°C

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

269

67030

570269

90

90

120.430521

670

570

450

40

110

110

670

670

4

1

3

2

5 6

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TE*2

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1. Functions ....................................................................................24


3. Dimensions .................................................................................27

Ceiling Mounted Cassette Type (4Way) (2)


1. Functions

Indoor Unit









Auto Restart








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






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



Hot-start Control


25 °C

27 °C

35 °C30 °C

22 °C

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(39)°C

25°C22(20)°C

36(42)°C

Minimum

3min

Settingfan

speed

Settingfan

speed

Settingfan







3. Dimensions

Dimensions

76, S

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dong

, Cha

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(uni

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4 3

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154

A direction View

126R35

62

A


Dimensions

840

126 62

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246195

A direction View

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4 3

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A


Dimensions

76, S

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4 3

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109

R35

126

288

237

A direction View

A


1. Functions ....................................................................................31


3. Dimensions .................................................................................39

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.

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.

Cooling Mode Operation• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan stop.

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

Compressor ON Temp=> Setting Temp+0.5°C

Compressor OFF Temp => Setting Temp-0.5°C

• 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.

Function of Controls

Operation Details


Healthy Dehumidification Mode

• When the dehumidification operation input by the remote controller is received, the intake air temperature isdetected and the setting temp is automatically set according to the intake air temperature.

26°C ≤ Intake Air Temp => 25°C

24°C ≤ Intake Air Temp < 26°C => Intake Air Temp-1°C

18°C ≤ Intake Air Temp < 24°C => Intake Air Temp-0.5°C

Intake Air Temp < 18°C => 18°C

• 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

Compressor OFF Temp. => Setting Temp-0.5°C

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

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

Themo OFF Temp. => Setting Temp.+4°C

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

• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C , when above 35°C , itoperates with the low airflow speed.

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

Defrost Control

• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle todefrost of the outdoor unit.

Fuzzy Operation (Outdoor unit C/O Model)

• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the settingtemp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.

Compressor ON Temp => Setting Temp+0.5°C

Compressor OFF Temp => Setting Temp+0.5°C

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


24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C

22°C ≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C

18°C ≤ Intake Air Temp<22°C => Intake Air Temp

Intake Air Temp<18°C => 18°C

• 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

Operation Details


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 sincethe 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 ≤ Inatake Air Temp => Fuzzy Operation for Cooling

21°C ≤ Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification

Inatake Air Temp<21°C => 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.

1) Fuzzy Operation for Cooling• 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 or more above the setting temp, the compressor isturned on.










• 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 or more below




Operation Details


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







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

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

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

Compressor ON Temp => Setting Temp + 2°CCompressor OFF Temp => Setting Temp + 4°C

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


• 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.

Airflow Speed Selection

• The airflow speed of the indoor fan is set to high, medium, low, or chaos by the input of the airflow speedselection key on the remote controller.

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.

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


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 operationis carried out according to the set time.

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 inappliance 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 After another 30 min elapse, it increases by 1°C 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.

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.

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.”

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

• 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.

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.”





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)

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 onthe 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 and the high speed ofairflow.

Forced Operation (Outdoor unit H/P Model)

• To operate the appliance by force in case that the remote controller is lost, the forced operation selectionswitch 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 ≤ Intake Air Temp => Cooling Mode Operation, 22°C, High Speed

21°C ≤ Intake Air Temp < 24°C => Dehumidification Operation, 23°C, High Speed

Intake Air Temp < 21°C => Heating Mode Operation, 24°C, High Speed

Test Operation Control

• To check the condition of the installation when installing the appliance, the appliance is operated at coolingmode, 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.

Protection of the evaporator pipe from frosting

• In the temperrature of the indoor pipe is below 0°C after 7 minutes from starting the compressor, the compres-sor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the temperature ofthe indoor pipe is over 7°C, the compressor and the outdoor fan are reoperated.

• Outdoor fan motor stops when indoor pipe temperature is blow 3°C and restarts at the pipe temperature above6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously ateven below 3°C.

Operation Details


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.

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

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san-

dong

, Cha

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Dimensions


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1. Functions ....................................................................................42


3. Dimensions .................................................................................50

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.




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














• 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

Themo OFF Temp. => Setting Temp.+4°C

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



Defrost Control

• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle todefrost of the outdoor unit.













Operation Details

























Operation Details


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










Compressor ON Temp => Setting Temp + 2°CCompressor OFF Temp => Setting Temp + 4°C

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


• 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.



On-Timer Operation




Off-Timer Operation




Operation Details



• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operationis carried out according to the set time.








desired direction.








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





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 onthe 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 and the high speed ofairflow.

Forced Operation (Outdoor unit H/P Model)

• To operate the appliance by force in case that the remote controller is lost, the forced operation selectionswitch 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 ≤ Intake Air Temp => Cooling Mode Operation, 22°C, High Speed

21°C ≤ Intake Air Temp < 24°C => Dehumidification Operation, 23°C, High Speed

Intake Air Temp < 21°C => Heating Mode Operation, 24°C, High Speed

Test Operation Control

• To check the condition of the installation when installing the appliance, the appliance is operated at coolingmode, 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.

Protection of the evaporator pipe from frosting

• In the temperrature of the indoor pipe is below 0°C after 7 minutes from starting the compressor, the compres-sor and outdoor fan are stopped, and 3 minutes delay of operating of the compressor, when the temperature ofthe indoor pipe is over 7°C, the compressor and the outdoor fan are reoperated.

• Outdoor fan motor stops when indoor pipe temperature is blow 3°C and restarts at the pipe temperature above6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously ateven below 3°C.

Operation Details


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

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, Cha

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500

525


1. Funtions ......................................................................................52


3. Dimensions .................................................................................56

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.

High head height Drain pump • A standard drain-head height of up to 700mm is possible.





• High, Med, Low




Functions





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.


SET TEMPERATURE +0.5°C(Thermo. ON)

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

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

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

(Thermal OFF)

Indoor unitHeat-Exchangertemperature

T LT

T ST

1minMinimum

3min 1min

3min

Settingfan

spped

Settingfan

spped

Settingfan

spped

40°C

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, fan operates at low speed, when it becomes lower than 40°C 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 19°C 19°C 19°C 19°C 19°C 19°C 26°C 26°C

22°C 22°C 22°C 22°C 22°C 22°C 22°C 27°C 27°C

25°C 25°C 25°C 25°C 25°C 25°C 25°C 28°C 28°C

27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C

B1 B2 CE CF VE VJ


Hot-Start Control

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

• 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

➀ Power Off On ➁ Operation Off On➂ Cooling operation Heating operation➃ 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

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CH

AS

SIS

CO

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: B1/

B2

Cei

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Con

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AR

NU

07G

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12G

B1G

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U15

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18G

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Unit

size(

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k,18

k):ø

6.35

Unit

size(

24k)

:ø9.

52Un

it siz

e(7k

,9k,

12k,

18k)

:ø12

.7Un

it siz

e(24

k):ø

15.8

8

5

6

21

3 4


1. Funtions ......................................................................................58


3. Dimensions .................................................................................62

Ceiling Concealed Duct Type (Built in)










Auto Restart








• High, Med, Low




Functions










3 minutes 3 minutes




INDOOR FAN Low Low


Operation Details







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

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

19°C 19°C 19°C 19°C 19°C 19°C 19°C 26°C 26°C

22°C 22°C 22°C 22°C 22°C 22°C 22°C 27°C 27°C

25°C 25°C 25°C 25°C 25°C 25°C 25°C 28°C 28°C

27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C

B1 B2 CE CF VE VJ


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/

B4

Cei

ling

Con

ceal

ed D

uct (

Bui

lt in

)

ARNU

07G

B3G

2+PB

SGB3

0(Ac

c'y),

PBSC

30(A

cc'y)

ARNU

09G

B3G

2+PB

SGB3

0(Ac

c'y),

PBSC

30(A

cc'y)

ARNU

12G

B3G

2+PB

SGB3

0(Ac

c'y),

PBSC

30(A

cc'y)

ARNU

15G

B3G

2+PB

SGB3

0(Ac

c'y),

PBSC

30(A

cc'y)

ARNU

18G

B4G

2+PB

SGB4

0(Ac

c'y),

PBSC

40(A

cc'y)

ARNU

24G

B4G

2+PB

SGB4

0(Ac

c'y),

PBSC

40(A

cc'y)

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

.

Wit

h S

uct

ion

Gri

lle

Wit

h S

uct

ion

Gri

lle &

Su

ctio

n C

anva

s

B3/

B4

A

Wit

h S

uct

ion

Gri

lle&

Su

ctio

n C

anva

s W

ith

Su

ctio

n G

rille

AC

B

AB

C

Btu

/hA

7,9,

12k

820

18,2

4k11

00

AB

CP

BS

GB

3091

035

956

PB

SG

B40

1188

359

56

AB

CP

BS

C30

821

274

42~2

50P

BS

C40

1100

274

42~2

50

250

190

618

388

190

500(Max)575

388

190

6560

277

216 24

Nam

e

1Li

quid

pip

e co

nnec

tion

2G

as p

ipe

conn

ectio

n

3D

rain

pip

e co

nnec

tion

4Po

wer

sup

ply

conn

ectio

n

5A

ir di

scha

rge

6A

ir su

ctio

n

Num

ber

Des

crip

ition

(uni

t : m

m)

Unit

size(

7k,9

k,12

k,18

k):ø

6.35

Unit

size(

24k)

:ø9.

52Un

it siz

e(7k

,9k,

12k,

18k)

:ø12

.7Un

it siz

e(24

k):ø

15.8

8

6

5

1 3

4

2


1. Funtions ......................................................................................64


3. Dimensions .................................................................................68

Ceiling Concealed Duct Type (High Static)

Funtion










Auto Restart








• 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

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

19°C 19°C 19°C 19°C 19°C 19°C 19°C 26°C 26°C

22°C 22°C 22°C 22°C 22°C 22°C 22°C 27°C 27°C

25°C 25°C 25°C 25°C 25°C 25°C 25°C 28°C 28°C

27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C

B1 B2 CE CF VE VJ

Operation Details


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

: BH

Cei

ling

Con

ceal

ed D

uct (

Hig

h S

tatic

)

AR

NU

07G

BH

A2

AR

NU

09G

BH

A2

AR

NU

12G

BH

A2

AR

NU

15G

BH

A2

AR

NU

18G

BH

A2

AR

NU

24G

BH

A2

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

.

48 5216

5

140

123

101

3151 29

70

50 100

260

87

750

30

47355

450

932

133

355

450

114

224

60

R37.5

47

49

24

21

882

882

158

260

450

65

108

6424

321

224

311

9

75

115

745

20 175

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

disc

harg

e

6

Air

suct

ion

Num

ber

Des

crip

ition

(uni

t : m

m)

Unit

size(

7k,9

k,12

k,18

k):ø

6.35

Unit

size(

24k)

:ø9.

52Un

it siz

e(7k

,9k,

12k,

18k)

:ø12

.7Un

it siz

e(24

k):ø

15.8

83

2

5

1

4

6

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

: BG

Cei

ling

Con

ceal

ed D

uct (

Hig

h S

tatic

)

AR

NU

28G

BG

A2

AR

NU

36G

BG

A2

AR

NU

42G

BG

A2

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

.

261

122

140

47

5316

5

325110

2

50 100

87

830

2975

355

87

1,23

0

450

23

49

108

1,18

2

158 113

298

186

232

243

243

232

23211

51,

043

20 220

32

5

1

4

6N

ame

1

Liqu

id p

ipe

conn

ectio

n Un

it siz

e(28

k,36

k,42

k):ø

9.52

2

Gas

pip

e co

nnec

tion

Unit

size(

28k,

36k,

42k)

:ø15

.88

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)

152

224

60

ø100

1,18

2

450

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

48G

BR

A2

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

.

221123

72268310

1

90

135

122

144

260

190

115

1,28

4

477 56

590

118 1,

004

114

1,23

0

50

32

168 185

215

279

241

279

380

140

21512

01,

092

25 303

Nam

e

1

Liqu

id p

ipe

conn

ectio

n Un

it siz

e(48

k):ø

9.52

2

Gas

pip

e co

nnec

tion

Unit

size(

48k)

:ø15

.88

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)

32

1

5

6

4

198

312

60

R60

590

1,23

0

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

76G

B8A

2U

RN

U96

GB

8A2

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

.

1,56

2

1,62

246

0

688

560 64

30

1,2

20

1,5

62

329

320

329

318

293

460 688

290 161

70 120

9914

0

44020

1,39

611

5

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

disc

harg

e

6

Air

suct

ion

Num

ber

Des

crip

ition

(uni

t : m

m)

Uni

t siz

e(76

k,96

k):ø

9.52

Uni

t siz

e(76

k):ø

19.0

5U

nit s

ize(

96k)

:ø22

.2

3

2

1

4

5

6

64 70 60 122

35810

96818

58


1. Functions ....................................................................................73


3. Dimensions .................................................................................81

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






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














• When the intake air temp reaches +3°Cabove the setting temp, the compressor is turned off. When below thesetting temp, the compressor is turned on.

Thermo ON Temp. => Setting Temp. +2°C

Thermo OFF Temp. => Setting Temp. +4°C

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



Defrost Control

• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle todefrost the outdoor unit.






Operation Details
































Operation Details












Compressor ON Temp => Setting Temp. +2°CCompressor OFF Temp => Setting Temp. +4°C

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


• 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.



On-Timer Operation




Off-Timer Operation




Operation Details



• When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation iscarried out according to the set time.








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.

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.





Operation Details




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.

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.

Protection of the evaporator pipe from frosting• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool-

ing 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 or higher after 3 min. pause of the compressor, the compressor and theoutdoor fan is turned on according to the condition of the room temperature.

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 21°C ≤ Room Temp. < 24°C Room Temp. < 21°C

Operating mode Cooling Cooling Healthy Dehumidification Heating

Indoor Fan Speed High High High High

Setting Temperature 22°C 22°C 23°C 24°C

Operation Details






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

: SE

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

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

.

(uni

t : m

m)

165

895

282

567

265

2

1

Nam

e

1

Air

disc

harg

e gr

ill

2

Air

suct

ion

grill

Num

ber

Des

crip

ition

(uni

t : m

m)

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

: 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

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

.

(uni

t : m

m)

1,09

0

178

300

281

804

Nam

e

1

Air

disc

harg

e gr

ill

2

Air

suct

ion

grill

Num

ber

Des

crip

ition

(uni

t : m

m)

1

2


1. Funtions ......................................................................................84


3. Dimensions .................................................................................88

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.






• 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

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

19°C 19°C 19°C 19°C 19°C 19°C 19°C 26°C 26°C

22°C 22°C 22°C 22°C 22°C 22°C 22°C 27°C 27°C

25°C 25°C 25°C 25°C 25°C 25°C 25°C 28°C 28°C

27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C

B1 B2 CE CF VE VJ


Operation Details

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

ww

w.lg

eairc

on.c

om

CH

AS

SIS

CO

DE

: VE

Cei

ling

& F

loor

AR

NU

09G

VE

A2

AR

NU

12G

VE

A2

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

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1. Function ......................................................................................91


3. Dimensions .................................................................................95

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.






• 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

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

19°C 19°C 19°C 19°C 19°C 19°C 19°C 26°C 26°C

22°C 22°C 22°C 22°C 22°C 22°C 22°C 27°C 27°C

25°C 25°C 25°C 25°C 25°C 25°C 25°C 28°C 28°C

27°C 27°C 27°C 27°C 27°C 27°C 27°C 30°C 30°C

B1 B2 CE CF VE VJ

Operation Details


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

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Part 3Trouble shooting guide


Self-diagnosis function .....................................................................99

Trouble shooting guide


Self-diagnosis function

Self-diagnosis functionSelf-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

Air temperature sensor of indoor unit is open or short

Inlet pipe temperature sensor of indoor unit is open or short

Failing to receive wired remote controller signal in indoor unit PCB

Malfunction of drain pump

Failing to receive outdoor unit signal in indoor unit PCB

Outlet pipe temperature sensor of indoor unit is open or short

Operation mode between indoor unit and outdoor unit is different

In case when the serial number marked on EEPROM of Indoor unit is 0 or FFFFFF

Disconnecting the fan motor connector/Failure of indoor fan motorlock

When the addressing signal doesn't respond for 3mins. suddenly,while the indoor unit gets the calling signal from the outdoor unit,

Ind

oo

r u

nit

rel

ated

err

or

Air temperature sensor of indoor unit

Inlet pipe temperature sensor of indoor unit

Transmission error : wired remote controller↔ indoor unitDrain pump

Transmission error : outdoor unit ↔ indoorunit

Outlet pipe temperature sensor of indoor unit

Different operation mode

Serial No.

Poor fan motor operation

Transmission error: indoor unit main PCBof outdoor.

0 1 -0 2 -

0 3 -

0 4 -

0 5 -

0 6 -0 7 -

0 9 -

1 0 -

1 1 -



01 Indoor unit air sensor error

02 Indoor unit pipe inlet sensor error

06 Indoor unit pipe outlet sensor error

ErrorNo.

Error Type Error Point Main Reasons

Indoor unit sensor isopen/short

1. Indoor unit PCB wrong connection

2. Indoor unit PCB failure

3. Sensor problem (main reason)

** 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 = 20.7kΩ : 25°C= 10kΩ : 50°C= 3.4kΩPipe temp sensor: 10°C = 10kΩ : 25°C= 5kΩ : 50°C= 1.8kΩ

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

CN-ROOM : Indoor air temp sensor

CN-PIPE2 : Pipe outlet temp sensor

CN-PIPE1 : Pipe inlet temp sensor

Measure the resistance of outlet pipe temp sensor.



* If there is no remote controller to replace : Use another unit’s 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 unit’s 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.



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

No

In indoor unit PCB Does the terminal voltage

for drain pump has 220V output?**

Replace indoor unit PCB

Replace Drain Pump

Yes

Checkthedrainheadheightandslope***

Remove it & clean the pump

float

Checkingfloatswitch

(HighpositionOpen)

No

Condensatewater

(Lowpositionshort0ohm)

* 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 220V)

(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



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 fault Checking ch07 methodIDU doesn’t 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)



11Indoor unit transmission error

ErrorNo.


Indoor unit doesn’t get sig-nal from ODU for 3 minutescontinuously

1. Indoor 485 transmission PCB fault

2. After PCB replacing, auto addressingwas not done


Yes

No After Auto addressing, error code disappears?

Replace indoor unit 485 transmission PCB

No After ODU main PCBreset, error code

disappears?

END

Yes

P/NO : MFL50459501 APRIL, 2008

system indoor unit r410a service manual...

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