LG MULTI V ARNU Series User manual

System
Indoor Unit
SERVICE MANUAL R410A
MODEL : ARNU Series
URNU Series
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com
R410A

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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.......................................................................................................................7
Ceiling Mounted Cassette Type (1 way).........................................................................................8
Ceiling Mounted Cassette Type (2 way).......................................................................................13
Ceiling Mounted Cassette Type (4 way)(1) ..................................................................................20
Ceiling Mounted Cassette Type (4 way)(2) ..................................................................................23
Art Cool Type(Mirror)....................................................................................................................30
Art Cool Type(Gallery) .................................................................................................................41
Ceiling Concealed Duct Type (Low static)....................................................................................51
Ceiling Concealed Duct Type (Built in).........................................................................................57
Ceiling Concealed Duct Type (High static)...................................................................................63
Wall Mounted Type.......................................................................................................................72
Ceiling & Floor Ceiling Suspended ..............................................................................................83
Floor Standing Type .....................................................................................................................90
Part 3 Trouble shooting guide.................................................................................97

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1
General Information
1. Model Names .............................................4
2. External Appearance .................................5
3. Nomenclature .............................................6

Model Names
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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Model Names
SE
Wall Mounted
(General) S5
SE
Mirror
S3
SF
1 Way TJ
2 Way TL
TE
4 Way TP
TN
TM
BH
BG
High
Static BR
B8
B1
Low Static
B2
B3
B4
Ceiling & Floor VE
Ceiling Suspended VJ
CE
With 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 Cool
Gallery
Floor
Standing
Without
Case
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
ARNU07
GSE*2
ARNU09
GSE*2
ARNU12
GSE*2
ARNU15
GSE*2
ARNU07
GTJ*2
ARNU09
GTJ*2
ARNU12
GTJ*2
ARNU18
GTL*2
ARNU24
GTL*2
ARNU07
GTE*2
ARNU09
GTE*2
ARNU12
GTE*2
ARNU15
GTE*2
ARNU18
GTE*2
ARNU24G
TP*2
ARNU28G
TP*2
ARNU07
GBHA2
ARNU09
GBHA2
ARNU12
GBHA2
ARNU15
GBHA2
ARNU18
GBHA2
ARNU24
GBHA2
ARNU07
GB1G2
ARNU09
GB1G2
ARNU12
GB1G2
ARNU15
GB1G2
ARNU07
GB3G2
ARNU09
GB3G2
ARNU12
GB3G2
ARNU15
GB3G2
ARNU07
GCEA2
ARNU09
GCEA2
ARNU12
GCEA2
ARNU15
GCEA2
ARNU07
GCEU2
ARNU09
GCEU2
ARNU12
GCEU2
ARNU15
GCEU2
ARNU09G
VEA2
ARNU12G
VEA2
ARNU18
GVJA2
ARNU24
GVJA2
ARNU18
GCFA2
ARNU24
GCFA2
ARNU18
GCFU2
ARNU24
GCFU2
ARNU28
GBGA2
ARNU36
GBGA2
ARNU42
GBGA2
ARNU36
GTN*2
ARNU48
GBRA2
ARNU42G
TM*2
ARNU48G
TM*2
URNU76
GB8A2
URNU96
GB8A2
ARNU18
GB2G2
ARNU24
GB2G2
ARNU18
GB4G2
ARNU24
GB4G2
ARNU07
GSE*2
ARNU09
GSE*2
ARNU12
GSE*2
ARNU15
GSE*2
ARNU07
GSF*2
ARNU09
GSF*2
ARNU12
GSF*2
ARNU18G
S5*2
ARNU24G
S5*2
ARNU18
GS3*2
ARNU24
GS3*2

External Appearance
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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. External Appearance
Wall Mounted
ART COOL Mirror
Ceiling Cassette- 1Way
Ceiling Cassette- 4Way
Ceiling & Floor
Ceiling Suspended
ARNU07GTJ*2
ARNU09GTJ*2
ARNU12GTJ*2
Ceiling Cassette -2Way
ARNU18GTL*2
ARNU24GTL*2
ARNU07GTE*2
ARNU09GTE*2
ARNU12GTE*2
ARNU15GTE*2
ARNU18GTE*2
ARNU24GTP*2
ARNU28GTP*2
ARNU36GTN*2
ARNU42GTM*2
ARNU48GTM*2
Ceiling Concealed Duct - Low Static
ARNU07GB1G2
ARNU09GB1G2
ARNU12GB1G2
ARNU15GB1G2
ARNU18GB2G2
ARNU24GB2G2
ARNU07GSE*2
ARNU09GSE*2
ARNU12GSE*2
ARNU15GSE*2
ARNU18GS5*2
ARNU24GS5*2
ARNU07GSE*2
ARNU09GSE*2
ARNU12GSE*2
ARNU15GSE*2
ARNU18GS3*2
ARNU24GS3*2
ARNU09GVEA2
ARNU12GVEA2
ARNU18GVJA2
ARNU24GVJA2
Floor Standing
With case
ARNU07GCEA2
ARNU09GCEA2
ARNU12GCEA2
ARNU15GCEA2
ARNU18GCFA2
ARNU24GCFA2
Without case
ARNU07GCEU2
ARNU09GCEU2
ARNU12GCEU2
ARNU15GCEU2
ARNU18GCFU2
ARNU24GCFU2
Ceiling Concealed Duct - High Static
ARNU07GBHA2
ARNU09GBHA2
ARNU12GBHA2
ARNU15GBHA2
ARNU18GBHA2
ARNU24GBHA2
ARNU28GBGA2
ARNU36GBGA2
ARNU42GBGA2
ARNU48GBRA2
URNU76GB8A2
URNU96GB8A2
Ceiling Concealed Duct – Built-in
ARNU07GB3G2
ARNU09GB3G2
ARNU12GB3G2
ARNU15GB3G2
ARNU18GB4G2
ARNU24GB4G2
* A:Basic, L:Plasma
ART COOL Gallery
ARNU07GSF*2
ARNU09GSF*2
ARNU12GSF*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 : Blue
M : Metal
D : Wood
R : Mirror
W : White Wood
SE: * R:Mirror
V:Silver
B : Blue

Nomenclature
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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
3. Nomenclature
ARN U G07 ATJ 2
Serial Number
Chassis Name
Electrical Ratings
1:1Ø, 115V, 60Hz 2: 1Ø, 220V, 60Hz
6:1Ø, 220 ~ 240V, 50Hz 7: 1Ø, 100V, 50/60Hz
G: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 Pump
N: AC Inverter and H/P V: AC Inverter and C/O
U: DC Inverter and H/P and C/O
System with
Indoor Unit using R410A
❈LGETA:U Ex) URN
Combinations of functions
A:Basic function
L:Neo Plasma(Wall Mounted)
C:Plasma(Ceiling Cassette)
G: Low Static
ART COOL Type Panel Color
B:Blue D:Wood M:Metal R:Mirror W:White Wood
V: Silver E:Red G:Gold 1: Kiss (Photo changeable)

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2
Indoor Units
Ceiling Cassette
1 Way .................................................................................8
2 Way ...............................................................................13
4 Way(1)...........................................................................20
4 Way(2)...........................................................................23
Art Cool Series
ART COOL Miror .............................................................30
ART COOL Gallery ..........................................................41
Ceiling Concealed Duct
Low Static ........................................................................51
Built In ..............................................................................57
High Static........................................................................63
Wall Mounted(General)
Wall Mounted ...................................................................72
Ceiling & Floor
Ceiling & Floor
Ceiling Suspended...........................................................83
Floor Standing
Floor Standing..................................................................90

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Functions ......................................................................................9
2. Operation Details........................................................................10
3. Dimensions .................................................................................12
Ceiling Mounted Cassette Type (1Way)

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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 smaller
size 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-bacteria
filter 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 fan
motor 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.

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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
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 Selected
Speed Speed Speed
INDOOR FAN Low Low