Haier Air Conditioner R410A User Manual
Internal Use Only  
http://biz.lgservice.com  
System  
R410A  
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.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Part 1  
General Information  
1. Model Names .............................................4  
2. External Appearance .................................5  
3. Nomenclature .............................................6  
- 3 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Model Names  
1. Model Names  
Capacity(Btu/h(kW))  
18k 24k 28k 36k  
(5.6) (7.1) (8.2) (10.6) (12.3) (14.1) (22.4) (28)  
Category  
Chassis  
Name  
7k  
9k  
12k  
15k  
42k  
48k  
76k 96k  
(2.2) (2.8) (3.6) (4.5)  
ARNU07 ARNU09 ARNU12 ARNU15  
SE  
S5  
SE  
Wall Mounted  
(General)  
GSE*2  
GSE*2  
GSE*2  
GSE*2  
ARNU18G ARNU24G  
S5*2  
S5*2  
ARNU07 ARNU09 ARNU12 ARNU15  
GSE*2 GSE*2 GSE*2 GSE*2  
Mirror  
ARNU18 ARNU24  
GS3*2 GS3*2  
ART COOL  
S3  
SF  
TJ  
ART Cool  
Gallery  
ARNU07 ARNU09 ARNU12  
GSF*2 GSF*2 GSF*2  
ARNU07 ARNU09 ARNU12  
GTJ*2 GTJ*2 GTJ*2  
1 Way  
2 Way  
ARNU18 ARNU24  
TL  
GTL*2  
ARNU07 ARNU09 ARNU12 ARNU15 ARNU18  
GTE*2 GTE*2 GTE*2 GTE*2 GTE*2  
GTL*2  
TE  
TP  
TN  
TM  
BH  
BG  
BR  
B8  
B1  
Ceiling  
ARNU24G ARNU28G  
TP*2  
Cassette  
TP*2  
4 Way  
ARNU36  
GTN*2  
ARNU42G ARNU48G  
TM*2  
TM*2  
ARNU07 ARNU09 ARNU12 ARNU15 ARNU18 ARNU24  
GBHA2 GBHA2 GBHA2 GBHA2 GBHA2 GBHA2  
ARNU28 ARNU36 ARNU42  
GBGA2 GBGA2 GBGA2  
High  
ARNU48  
GBRA2  
Static  
URNU76 URNU96  
GB8A2 GB8A2  
Ceiling  
Concealed  
Duct  
ARNU07 ARNU09 ARNU12 ARNU15  
GB1G2 GB1G2 GB1G2 GB1G2  
Low Static  
Built In  
ARNU18 ARNU24  
GB2G2 GB2G2  
B2  
B3  
ARNU07 ARNU09 ARNU12 ARNU15  
GB3G2 GB3G2 GB3G2 GB3G2  
B4  
ARNU18 ARNU24  
GB4G2 GB4G2  
ARNU09G ARNU12G  
VEA2 VEA2  
Ceiling & Floor  
VE  
VJ  
ARNU18 ARNU24  
GVJA2 GVJA2  
Ceiling Suspended  
ARNU07 ARNU09 ARNU12 ARNU15  
GCEA2 GCEA2 GCEA2 GCEA2  
CE  
CF  
With Case  
ARNU18 ARNU24  
GCFA2 GCFA2  
Floor  
ARNU07 ARNU09 ARNU12 ARNU15  
GCEU2 GCEU2 GCEU2 GCEU2  
Standing  
CE  
CF  
Without  
Case  
ARNU18 ARNU24  
GCFU2 GCFU2  
❈ *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  
- 4 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
External Appearance  
2. External Appearance  
Ceiling Cassette- 1Way  
ARNU07GTJ*2  
ARNU09GTJ*2  
ARNU12GTJ*2  
Ceiling Cassette -2Way  
ARNU18GTL*2  
ARNU24GTL*2  
* A:Basic, C:Plasma  
* A:Basic, C:Plasma  
Ceiling Cassette- 4Way  
Ceiling Concealed Duct - High Static  
ARNU07GTE*2  
ARNU09GTE*2  
ARNU12GTE*2  
ARNU15GTE*2  
ARNU18GTE*2  
ARNU24GTP*2  
ARNU28GTP*2  
ARNU36GTN*2  
ARNU42GTM*2  
ARNU48GTM*2  
ARNU07GBHA2  
ARNU09GBHA2  
ARNU12GBHA2  
ARNU15GBHA2  
ARNU18GBHA2  
ARNU24GBHA2  
ARNU28GBGA2  
ARNU36GBGA2  
ARNU42GBGA2  
ARNU48GBRA2  
URNU76GB8A2  
URNU96GB8A2  
* A:Basic, C:Plasma  
Ceiling Concealed Duct - Low Static  
ARNU07GB1G2 ARNU15GB1G2  
ARNU09GB1G2 ARNU18GB2G2  
ARNU12GB1G2 ARNU24GB2G2  
Wall Mounted  
ARNU07GSE*2  
ARNU09GSE*2  
ARNU12GSE*2  
ARNU15GSE*2  
ARNU18GS5*2  
ARNU24GS5*2  
* A:Basic, L:Plasma  
ART COOL Gallery  
Ceiling Concealed Duct – Built-in  
ARNU07GSF*2  
ARNU09GSF*2  
ARNU12GSF*2  
ARNU07GB3G2  
ARNU09GB3G2  
ARNU12GB3G2  
ARNU15GB3G2  
ARNU18GB4G2  
ARNU24GB4G2  
* E:Red V:Silver  
G:Gold 1: Kiss (Photo changeable)  
ART COOL Mirror  
Floor Standing  
With case  
S3: * B : Blue SE: * R:Mirror  
ARNU07GSE*2  
ARNU09GSE*2  
ARNU12GSE*2  
ARNU15GSE*2  
ARNU18GS3*2  
ARNU24GS3*2  
M : Metal  
D : Wood  
R : Mirror  
W : White Wood  
V:Silver  
B : Blue  
ARNU07GCEA2  
ARNU09GCEA2  
ARNU12GCEA2  
ARNU15GCEA2  
ARNU18GCFA2  
ARNU24GCFA2  
Ceiling & Floor  
ARNU09GVEA2  
ARNU12GVEA2  
Without case  
ARNU07GCEU2  
ARNU09GCEU2  
ARNU12GCEU2  
ARNU15GCEU2  
ARNU18GCFU2  
ARNU24GCFU2  
Ceiling Suspended  
ARNU18GVJA2  
ARNU24GVJA2  
- 5 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Nomenclature  
3. Nomenclature  
ARN  
U
07  
G
TJ  
A
2
Serial Number  
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)  
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  
- 6 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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  
- 7 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ceiling Mounted Cassette Type (1Way)  
1. Functions ......................................................................................9  
2. Operation Details........................................................................10  
3. Dimensions .................................................................................12  
- 8 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Specification  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
Airflow Direction Control  
•
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.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator pip-  
ing temperature will be reached at 25°C.  
Hot-start Control (Heating)  
Compact and light design  
• To install a unit is very convenient because of smaller  
size than textile.  
• The most advanced low-noise design.  
• The adoption of turbo fan and round type heat exchang-  
er give the quietest operation.  
Low noise  
• Long life wrinkle(type) and washable and anti-bacteria  
filter is adopted.  
Long life filter  
• Built-in drain pump automatically drains water.  
• A standard drain-head height of up to 700mm is possible.  
High head Drain pump  
High-Ceiling corresponding Function  
• According to the height of ceiling, the RPM of indoor fan  
motor is selected to increase air reaching distance.  
•
It is operating individually or totally by central control function.  
Central Control(Optional)  
- 9 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
2. Operation Detail  
(1) The function of main control  
I Auto Swing Control  
• This function is to swing the louver up and down automatically.  
I 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.  
I 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  
Intake Air Temperature  
Thermo. ON  
(SET TEMPERATURE +0.5°C)  
Thermo. OFF  
(SET TEMPERATURE -0.5°C)  
More than  
3 minutes  
More than  
3 minutes  
Selected  
Speed  
Selected  
Speed  
Selected  
Speed  
INDOOR FAN  
Low  
Low  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 10 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor pipe  
Temperature  
36(42)°C  
33(39)°C  
25°C  
22(20)°C  
Room  
Temperature  
Thermal Off  
Thermal On  
Minimum  
3min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
Setting  
fan  
speed  
Setting  
fan  
speed  
Setting  
fan  
speed  
Indoor fan  
4 Way  
Stop Low Low  
Low  
Low Stop Stop Low  
ON  
Thermal ON  
ST+2  
Thermal OFF  
ST+4  
Indoor Unit mode  
2TH  
(Remo.+Indoor)  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
Remo. mode  
ST+0  
ST+2  
I 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.  
Pipe  
temperature  
35 °C  
30 °C  
27 °C  
25 °C  
22 °C  
LO  
LOW  
Indoor fan  
SELECTED  
LOW  
OFF  
LOW  
LOLOW  
FAN  
speed  
COMP  
ON  
- 11 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
3. Dimensions  
5 6  
1 0 0  
1 5 1  
1 7 3  
2 4 2 . 5  
16.4  
110  
3 4 4 . 4  
4 1 0  
4 8 0  
- 12 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ceiling Mounted Cassette Type (2Way)  
1. Functions ....................................................................................14  
2. Operation Details........................................................................15  
3. Dimensions .................................................................................17  
- 13 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
Airflow Direction Control  
•
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.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator pip-  
ing temperature will be reached at 25°C.  
Hot-start Control (Heating)  
Compact and light design  
• To install a unit is very convenient because of smaller  
size than textile.  
• The most advanced low-noise design.  
• The adoption of turbo fan and round type heat exchang-  
er give the quietest operation.  
Low noise  
• Long life wrinkle(type) and washable and anti-bacteria  
filter is adopted.  
Long life filter  
• Built-in drain pump automatically drains water.  
• A standard drain-head height of up to 700mm is possible.  
High head Drain pump  
High-Ceiling corresponding Function  
• According to the height of ceiling, the RPM of indoor fan  
motor is selected to increase air reaching distance.  
•
It is operating individually or totally by central control function.  
Central Control(Optional)  
- 14 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
2. Operation Detail  
(1) The function of main control  
I Auto Swing Control  
• This function is to swing the louver up and down automatically.  
I 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.  
I 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  
Intake Air Temperature  
Thermo. ON  
(SET TEMPERATURE +0.5°C)  
Thermo. OFF  
(SET TEMPERATURE -0.5°C)  
More than  
3 minutes  
More than  
3 minutes  
Selected  
Speed  
Selected  
Speed  
Selected  
Speed  
INDOOR FAN  
Low  
Low  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 15 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor pipe  
Temperature  
36(42)°C  
33(39)°C  
25°C  
22(20)°C  
Room  
Temperature  
Thermal Off  
Thermal On  
Minimum  
3min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
Setting  
fan  
speed  
Setting  
fan  
speed  
Setting  
fan  
speed  
Indoor fan  
4 Way  
Stop Low Low  
Low  
Low Stop Stop Low  
ON  
Thermal ON  
ST+2  
Thermal OFF  
ST+4  
Indoor Unit mode  
2TH  
(Remo.+Indoor)  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
Remo. mode  
ST+0  
ST+2  
I 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.  
Pipe  
temperature  
35 °C  
30 °C  
27 °C  
25 °C  
22 °C  
LO  
LOW  
Indoor fan  
SELECTED  
LOW  
OFF  
LOW  
LOLOW  
FAN  
speed  
COMP  
ON  
- 16 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
3. Dimensions  
5 5 0  
6 4 0  
6 9 . 5  
2 7 5  
- 17 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ceiling Mounted Cassette Type (4Way) (1)  
1. Functions ....................................................................................19  
2. Operation Details........................................................................20  
3. Dimensions .................................................................................22  
- 18 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
Airflow Direction Control  
•
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.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator pip-  
ing temperature will be reached at 25°C.  
Hot-start Control (Heating)  
Compact and light design  
• To install a unit is very convenient because of smaller  
size than textile.  
• The most advanced low-noise design.  
• The adoption of turbo fan and round type heat exchang-  
er give the quietest operation.  
Low noise  
• Long life wrinkle(type) and washable and anti-bacteria  
filter is adopted.  
Long life filter  
• Built-in drain pump automatically drains water.  
• A standard drain-head height of up to 700mm is possible.  
High head Drain pump  
High-Ceiling corresponding Function  
• According to the height of ceiling, the RPM of indoor fan  
motor is selected to increase air reaching distance.  
•
•
It is operating individually or totally by central control function.  
It is operating swirl swing  
Central Control(Optional)  
Swirl Swing Control  
- 19 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
2. Operation Detail  
(1) The function of main control  
I Auto Swing Control  
• This function is to swing the louver up and down automatically.  
I 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.  
I 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  
Intake Air Temperature  
Thermo. ON  
(SET TEMPERATURE +0.5°C)  
Thermo. OFF  
(SET TEMPERATURE -0.5°C)  
More than  
3 minutes  
More than  
3 minutes  
Selected  
Speed  
Selected  
Speed  
Selected  
Speed  
INDOOR FAN  
Low  
Low  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
I Swirl Swing Control  
Vane 2  
Vane 2, 4 is almost vane closed while vane1, 3 is opened.  
Vane 1, 3 and vane 2,4 turn over minutely  
Vane 1  
Vane 3  
Vane 4  
- 20 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Detail  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor pipe  
Temperature  
36(42)°C  
33(39)°C  
25°C  
22(20)°C  
Room  
Temperature  
Thermal Off  
Thermal On  
Minimum  
3min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
Setting  
fan  
speed  
Setting  
fan  
speed  
Setting  
fan  
speed  
Indoor fan  
4 Way  
Stop Low Low  
Low  
Low Stop Stop Low  
ON  
Thermal ON  
ST+2  
Thermal OFF  
ST+4  
Indoor Unit mode  
2TH  
(Remo.+Indoor)  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
Remo. mode  
ST+0  
ST+2  
I 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.  
Pipe  
temperature  
35 °C  
30 °C  
27 °C  
25 °C  
22 °C  
LO  
LOW  
Indoor fan  
SELECTED  
LOW  
OFF  
LOW  
LOLOW  
FAN  
speed  
COMP  
ON  
- 21 -  
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Dimensions  
3. Dimensions  
9 0  
9 0  
5 2 1  
5 7 0  
3 0  
1 2 0 . 4  
2 6 9  
3 0  
6 7 0  
- 22 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Ceiling Mounted Cassette Type (4Way) (2)  
1. Functions ....................................................................................24  
2. Operation Details........................................................................25  
3. Dimensions .................................................................................27  
- 23 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
Airflow Direction Control  
•
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.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator pip-  
ing temperature will be reached at 25°C.  
Hot-start Control (Heating)  
Compact and light design  
• To install a unit is very convenient because of smaller  
size than textile.  
• The most advanced low-noise design.  
• The adoption of turbo fan and round type heat exchang-  
er give the quietest operation.  
Low noise  
• Long life wrinkle(type) and washable and anti-bacteria  
filter is adopted.  
Long life filter  
• Built-in drain pump automatically drains water.  
• A standard drain-head height of up to 700mm is possible.  
High head Drain pump  
High-Ceiling corresponding Function  
• According to the height of ceiling, the RPM of indoor fan  
motor is selected to increase air reaching distance.  
•
•
It is operating individually or totally by central control function.  
It is operating swirl swing  
Central Control(Optional)  
Swirl Swing Control  
- 24 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Operation Detail  
2. Operation Detail  
(1) The function of main control  
I Auto Swing Control  
• This function is to swing the louver up and down automatically.  
I 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.  
I 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  
Intake Air Temperature  
Thermo. ON  
(SET TEMPERATURE +0.5°C)  
Thermo. OFF  
(SET TEMPERATURE -0.5°C)  
More than  
3 minutes  
More than  
3 minutes  
Selected  
Speed  
Selected  
Speed  
Selected  
Speed  
INDOOR FAN  
Low  
Low  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
I Swirl Swing Control  
Vane 2  
Vane 2, 4 is almost vane closed while vane1, 3 is opened.  
Vane 1, 3 and vane 2,4 turn over minutely  
Vane 1  
Vane 3  
Vane 4  
- 25 -  
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Operation Detail  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor pipe  
Temperature  
36(42)°C  
33(39)°C  
25°C  
22(20)°C  
Room  
Temperature  
Thermal Off  
Thermal On  
Minimum  
3min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
Setting  
fan  
speed  
Setting  
fan  
speed  
Setting  
fan  
speed  
Indoor fan  
4 Way  
Stop Low Low  
Low  
Low Stop Stop Low  
ON  
Thermal ON  
ST+2  
Thermal OFF  
ST+4  
Indoor Unit mode  
2TH  
(Remo.+Indoor)  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
To be selected lower temperature  
contrast Indoor Unit and Remo.  
Remo. mode  
ST+0  
ST+2  
I 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.  
Pipe  
temperature  
35 °C  
30 °C  
27 °C  
25 °C  
22 °C  
LO  
LOW  
Indoor fan  
SELECTED  
LOW  
OFF  
LOW  
LOLOW  
FAN  
speed  
COMP  
ON  
- 26 -  
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Dimensions  
3. Dimensions  
126  
2 0 4  
9 9  
8 2  
6 0  
8 4 0  
6 8 4  
A direction View  
1 5 4  
2 0 4  
6 7 1  
9 5 0  
6 1 8  
5 0 0 ( A i r o u t l e t h o l e )  
- 27 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Dimensions  
126  
A direction View  
1 9 5  
2 4 6  
- 28 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Dimensions  
126  
A direction View  
2 3 7  
2 8 8  
- 29 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Art Cool Type(Mirror)  
1. Functions ....................................................................................31  
2. Operation Details........................................................................32  
3. Dimensions .................................................................................39  
- 30 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (THERMISTOR)  
Room temperature control  
• Maintains the room temperature in accordance with the Setting Temp.  
Starting Current Control  
• Indoor fan is delayed for 5 sec at the starting.  
Indoor Fan Speed Control  
• High, Med, Low, CHAOS  
Operation indication Lamps (LED)  
Signal Receptor  
Receives 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  
Timer  
: Lights up during Sleep Mode Auto operation.  
: Lights up during Timer operation.  
Defrost Mode  
: Lights up during Defrost Mode or Hot Start operation.  
Soft Dry Operation Mode  
• Intermittent operation of fan at low speed.  
Sleep Mode Auto Control  
• The fan is switched to low(Cooling), med(Heating) speed.  
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.  
Defrost(Deice) control (Heating)  
Natural Air Control by CHAOS Logic  
• Both the indoor and outdoor fan stops dur-  
ing defrosting.  
• The fan is switched to intermittent or irregular operation  
•
The fan speed is automatically switched from high to low speed.  
Hot-start Control (Heating)  
• The indoor fan does not rotate until the  
evaporator pipe temperature will be reached  
at 28°C.  
Airflow Direction Control  
• The louver can be set at the desired position or swing  
up and down automatically.  
- 31 -  
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Operation Details  
2. Operation Details  
Function of Controls  
DISPLAY  
1) High quality LCD remote controller supplied  
Operation 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.  
I 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.  
- 32 -  
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Operation Details  
I 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 ≤ 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 dehumidification  
operation 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.  
I 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, with  
the 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 , it  
operates with the low airflow speed.  
• While in defrost control, both of the indoor and outdoor fans are turned off.  
I 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.  
I 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 setting  
temp, 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 the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-  
ature  
- 33 -  
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Operation Details  
I 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 only  
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air  
temp at that moment as follows.  
24°C ≤ Inatake Air Temp  
21°C ≤ Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification  
Inatake Air Temp<21°C => Fuzzy Operation for Heating  
=> Fuzzy Operation for Cooling  
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10  
sec 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 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 the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• 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  
the setting temp, 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  
- 34 -  
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Operation Details  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to  
the intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in  
dehumidification 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°C  
Compressor OFF Temp => Setting Temp + 4°C  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to  
the intake air temp at that time.  
20°C ≤ Intake Air Temp => Intake Air Temp + 0.5°C  
Intake Air Temp < 20°C => 20°C  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to  
the intake air temperature and the setting temperature.  
I 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.  
I 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.  
I 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.  
- 35 -  
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Operation Details  
I 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.  
I 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 temperature  
increases 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 to  
the low.  
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to  
the medium.  
I 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.  
I 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.”  
I 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 then  
operated in order that the air outflow could reach further.  
I 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, 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 then  
operated in order that the air outflow could reach further.  
I 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  
- 36 -  
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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)  
I 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 and the high speed of  
airflow.  
I 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.  
• Press the forced operation button, the forced operation is carried out.  
• Press the forced operation button once again to stop operation.  
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation  
condition 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  
I 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, Jet  
Cool) is input by the remote controller, the test operation is canceled and the appliance is operated according  
to the setting by the remote controller.  
I 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 of  
the 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 above  
6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously at  
even below 3°C.  
- 37 -  
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Operation Details  
I 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.  
I 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 be  
stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)  
will be operated again.  
- 38 -  
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Dimensions  
3. Dimensions  
2 8 2  
5 3  
2 6 5  
1 6 5  
2 8 2  
- 39 -  
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Dimensions  
3 0 4  
3 1 5  
1 7 3  
- 40 -  
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ArtCoolGallery  
1. Functions ....................................................................................42  
2. Operation Details........................................................................43  
3. Dimensions .................................................................................50  
- 41 -  
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Only for training and service purposes  
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Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (THERMISTOR)  
Room temperature control  
• Maintains the room temperature in accordance with the Setting Temp.  
Starting Current Control  
• Indoor fan is delayed for 5 sec at the starting.  
Indoor Fan Speed Control  
• High, Med, Low, CHAOS  
Operation indication Lamps (LED)  
Signal Receptor  
Receives 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  
Timer  
: Lights up during Sleep Mode Auto operation.  
: Lights up during Timer operation.  
Defrost Mode  
: Lights up during Defrost Mode or Hot Start operation.  
Soft Dry Operation Mode  
• Intermittent operation of fan at low speed.  
Sleep Mode Auto Control  
• The fan is switched to low(Cooling), med(Heating) speed.  
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.  
Defrost(Deice) control (Heating)  
Natural Air Control by CHAOS Logic  
• Both the indoor and outdoor fan stops dur-  
ing defrosting.  
• The fan is switched to intermittent or irregular operation  
•
The fan speed is automatically switched from high to low speed.  
Hot-start Control (Heating)  
• The indoor fan does not rotate until the  
evaporator pipe temperature will be reached  
at 28°C.  
Airflow Direction Control  
• The louver can be set at the desired position or swing  
up and down automatically.  
- 42 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Operation Details  
2. Operation Details  
Function of Controls  
DISPLAY  
1) High quality LCD remote controller supplied  
Operation 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.  
I 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.  
- 43 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Operation Details  
I 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 ≤ 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 dehumidification  
operation 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.  
I 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, with  
the 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 , it  
operates with the low airflow speed.  
• While in defrost control, both of the indoor and outdoor fans are turned off.  
I 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.  
I 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 setting  
temp, 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 the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-  
ature  
- 44 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I 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 only  
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air  
temp at that moment as follows.  
24°C ≤ Inatake Air Temp  
21°C ≤ Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification  
Inatake Air Temp<21°C => Fuzzy Operation for Heating  
=> Fuzzy Operation for Cooling  
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10  
sec 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 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 the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• 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  
the setting temp, 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  
- 45 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Operation Details  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to  
the intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in  
dehumidification 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°C  
Compressor OFF Temp => Setting Temp + 4°C  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to  
the intake air temp at that time.  
20°C ≤ Intake Air Temp => Intake Air Temp + 0.5°C  
Intake Air Temp < 20°C => 20°C  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to  
the intake air temperature and the setting temperature.  
I 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.  
I 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.  
I 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.  
- 46 -  
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Operation Details  
I 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.  
I 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 temperature  
increases 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 to  
the low.  
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to  
the medium.  
I 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.  
I 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.”  
I 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 then  
operated in order that the air outflow could reach further.  
I 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, 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 then  
operated in order that the air outflow could reach further.  
I 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  
- 47 -  
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Only for training and service purposes  
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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)  
I 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 and the high speed of  
airflow.  
I 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.  
• Press the forced operation button, the forced operation is carried out.  
• Press the forced operation button once again to stop operation.  
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation  
condition 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  
I 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, Jet  
Cool) is input by the remote controller, the test operation is canceled and the appliance is operated according  
to the setting by the remote controller.  
I 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 of  
the 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 above  
6°C or after 90 seconds, if the pipe temperature does not rise to 6°C, outdoor fan motor runs continuously at  
even below 3°C.  
- 48 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
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Operation Details  
I 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.  
I 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 be  
stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)  
will be operated again.  
- 49 -  
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Dimensions  
3. Dimensions  
5 2 5  
- 50 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
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Ceiling Concealed Duct Type (Low static)  
1. Funtions ......................................................................................52  
2. Operation Details........................................................................53  
3. Dimensions .................................................................................56  
- 51 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Functions  
1. Funtions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
•
Maintains the room temperature in accordance with the Setting Temperature.  
• Indoor fan is delayed for 5 seconds at the starting.  
• High, Med, Low  
• Intermittent operation of fan at low speed.  
• Although the air-conditioner is turned off by a power failure, it is restarted auto-  
matically previous operation mode after power supply.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
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.  
•
It is operating individually or totally by central control function.  
Central Control(Optional)  
- 52 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
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Operation Details  
2. Operation Details  
(1) The function of main control  
I 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.  
I 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.  
Intake Air Temperature  
SET TEMPERATURE +0.5°C  
(Thermo. ON)  
SET TEMPERATURE -0.5°C  
(Thermo. OFF)  
More than  
3 minutes  
More than  
3 minutes  
Selecting  
fan speed  
Selecting  
fan speed  
Selecting  
fan speed  
INDOOR FAN  
Low  
OFF  
Low  
OFF  
COMPRESSOR  
ON  
ON  
ON  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 53 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Operation Details  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor unit  
Heat-Exchanger  
40°C  
temperature  
T ST  
A
T LT  
T Off  
T On  
Intake Air Temperature  
3min  
Low fan during 10sec  
B
Setting Temperature  
+3°C  
(Thermal OFF)  
Setting Temperature  
(Thermal ON)  
Minimum  
3min  
1min  
1min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
C
Setting  
fan  
Setting  
fan  
Setting  
fan  
Indoor fan  
4way valve  
Off Low Low  
Low  
Low Off  
Off Low  
spped  
spped  
spped  
ON  
• 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.  
A
-
-
For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.  
B
C
To be operated "Low" except initial Hotstart operation  
High Static  
Low Static  
B2 CE  
Convertible  
VE  
Chassis  
BH  
BG  
BR  
B1  
CF  
VJ  
Hotstart On  
Hotstart Off  
T On  
T Off  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C 19°C 19°C 19°C  
22°C 22°C 22°C 22°C  
25°C 25°C 25°C 25°C  
27°C 27°C 27°C 27°C  
26°C  
27°C  
28°C  
30°C  
26°C  
27°C  
28°C  
30°C  
Low temperature T LT  
Setting Temperature T ST  
- 54 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Operation Details  
I 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.  
Indoor unit  
Heat-Exchanger  
temperature  
Hotstart Off  
Hotstart On  
1 min  
Low  
1 min  
Low  
Thermal  
Outdoor fan  
ON  
ON  
Setting fan  
speed  
Setting fan  
speed  
Indoor fan  
Off  
Off  
ON  
4way Valve  
• Initial Hotstart On state  
➀ Power Off ➠ On  
➁ Operation Off ➠ On  
➂ Cooling operation ➠ Heating operation  
➃ Defrost operation  
- 55 -  
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LGE Internal Use Only  
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Dimensions  
3. Dimensions  
2 1 6  
2 7 7  
2 4  
1 6 1  
1 4  
3 8 3  
5 7 5  
1 8  
1 5 4  
1 9 0  
- 56 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ceiling Concealed Duct Type (Built in)  
1. Funtions ......................................................................................58  
2. Operation Details........................................................................59  
3. Dimensions .................................................................................62  
- 57 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Functions  
1. Funtions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
•
Maintains the room temperature in accordance with the Setting Temperature.  
• Indoor fan is delayed for 5 seconds at the starting.  
• High, Med, Low  
• Intermittent operation of fan at low speed.  
• Although the air-conditioner is turned off by a power failure, it is restarted auto-  
matically previous operation mode after power supply.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
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.  
•
It is operating individually or totally by central control function.  
Central Control(Optional)  
- 58 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
2. Operation Details  
(1) The function of main control  
I 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.  
I 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.  
Intake Air Temperature  
SET TEMPERATURE +0.5°C  
(Thermo. ON)  
SET TEMPERATURE -0.5°C  
(Thermo. OFF)  
More than  
3 minutes  
More than  
3 minutes  
Selecting  
fan speed  
Selecting  
fan speed  
Selecting  
fan speed  
INDOOR FAN  
Low  
OFF  
Low  
OFF  
COMPRESSOR  
ON  
ON  
ON  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 59 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Operation Details  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor unit  
Heat-Exchanger  
40°C  
temperature  
T ST  
A
T LT  
T Off  
T On  
Intake Air Temperature  
3min  
Low fan during 10sec  
B
Setting Temperature  
+3°C  
(Thermal OFF)  
Setting Temperature  
(Thermal ON)  
Minimum  
3min  
1min  
1min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
C
Setting  
fan  
Setting  
fan  
Setting  
fan  
Indoor fan  
4way valve  
Off Low Low  
Low  
Low Off  
Off Low  
spped  
spped  
spped  
ON  
• 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.  
A
-
-
For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.  
B
C
To be operated "Low" except initial Hotstart operation  
High Static  
Low Static  
B2 CE  
Convertible  
VE  
Chassis  
Hotstart On  
Hotstart Off  
BH  
BG  
BR  
B1  
CF  
VJ  
T On  
T Off  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C 19°C 19°C 19°C  
22°C 22°C 22°C 22°C  
25°C 25°C 25°C 25°C  
27°C 27°C 27°C 27°C  
26°C  
27°C  
28°C  
30°C  
26°C  
27°C  
28°C  
30°C  
Low temperature T LT  
Setting Temperature T ST  
- 60 -  
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Operation Details  
I 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.  
Indoor unit  
Heat-Exchanger  
temperature  
Hotstart Off  
Hotstart On  
1 min  
Low  
1 min  
Low  
Thermal  
Outdoor fan  
ON  
ON  
Setting fan  
speed  
Setting fan  
speed  
Indoor fan  
Off  
Off  
ON  
4way Valve  
• Initial Hotstart On state  
➀ Power Off ➠ On  
➁ Operation Off ➠ On  
➂ Cooling operation ➠ Heating operation  
➃ Defrost operation  
- 61 -  
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Dimensions  
3. Dimensions  
2 1 6  
2 7 7  
2 4  
3 8 8  
6 1 8  
3 8 8  
5 7 5  
1 9 0  
2 5 0  
1 9 0  
5 0 0 ( M a x )  
- 62 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Ceiling Concealed Duct Type (High Static)  
1. Funtions ......................................................................................64  
2. Operation Details........................................................................65  
3. Dimensions .................................................................................68  
- 63 -  
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Only for training and service purposes  
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Funtion  
1. Funtions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
•
Maintains the room temperature in accordance with the Setting Temperature.  
• Indoor fan is delayed for 5 seconds at the starting.  
• High, Med, Low  
• Intermittent operation of fan at low speed.  
• Although the air-conditioner is turned off by a power failure, it is restarted auto-  
matically previous operation mode after power supply.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
Hot-start Control (Heating)  
• The indoor fan does not rotate until the evaporator piping  
temperature reaches 30°C.  
High head height Drain pump  
• A standard drain-head height of up to 700mm is possible.  
•
It is operating individually or totally by central control function.  
Central Control(Optional)  
- 64 -  
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Operation Details  
2. Operation Details  
(1) The function of main control  
I 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.  
I 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.  
Intake Air Temperature  
SET TEMPERATURE +0.5°C  
(Thermo. ON)  
SET TEMPERATURE -0.5°C  
(Thermo. OFF)  
More than  
3 minutes  
More than  
3 minutes  
Selecting  
fan speed  
Selecting  
fan speed  
Selecting  
fan speed  
INDOOR FAN  
Low  
OFF  
Low  
OFF  
COMPRESSOR  
ON  
ON  
ON  
- 65 -  
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LGE Internal Use Only  
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Operation Details  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor unit  
Heat-Exchanger  
40°C  
temperature  
T ST  
A
T LT  
T Off  
T On  
Intake Air Temperature  
3min  
Low fan during 10sec  
B
Setting Temperature  
+3°C  
(Thermal OFF)  
Setting Temperature  
(Thermal ON)  
Minimum  
3min  
1min  
1min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
C
Setting  
fan  
Setting  
fan  
Setting  
fan  
Indoor fan  
4way valve  
Off Low Low  
Low  
Low Off  
Off Low  
spped  
spped  
spped  
ON  
• 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.  
A
-
-
For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.  
B
C
To be operated "Low" except initial Hotstart operation  
High Static  
Low Static  
B2 CE  
Convertible  
VE  
Chassis  
BH  
BG  
BR  
B1  
CF  
VJ  
Hotstart On  
Hotstart Off  
T On  
T Off  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C 19°C 19°C 19°C  
22°C 22°C 22°C 22°C  
25°C 25°C 25°C 25°C  
27°C 27°C 27°C 27°C  
26°C  
27°C  
28°C  
30°C  
26°C  
27°C  
28°C  
30°C  
Low temperature T LT  
Setting Temperature T ST  
- 66 -  
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Operation Details  
I Hot-Start Control  
• The indoor fan does not rotate until the indoor unit Hex-Exchanger temperature reaches 22°C.  
• The operation diagram is as following.  
Indoor unit  
Heat-Exchanger  
temperature  
Hotstart Off  
Hotstart On  
1 min  
Low  
1 min  
Low  
Thermal  
Outdoor fan  
ON  
ON  
Setting fan  
speed  
Setting fan  
speed  
Indoor fan  
Off  
Off  
ON  
4way Valve  
• Initial Hotstart On state  
➀ Power Off ➠ On  
➁ Operation Off ➠ On  
➂ Cooling operation ➠ Heating operation  
➃ Defrost operation  
- 67 -  
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Dimensions  
3. Dimensions  
4 5 0  
1 3 3  
3 5 5  
1 7 5  
2 0  
1 5 8  
2 6 0  
3 5 5  
4 5 0  
4 5 0  
2 2 4  
- 68 -  
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LGE Internal Use Only  
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Dimensions  
4 5 0  
3 5 5  
1 5 8  
1 1 3  
1 8 6  
2 9 8  
4 5 0  
2 2 0  
2 0  
2 2 4  
- 69 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Dimensions  
2 2 1  
1 2 3  
7 2  
1 4 4  
1 2 2  
9 0  
5 9 0  
4 7 7  
1 6 8  
1 8 5  
5 6  
5 9 0  
1 4 0  
3 8 0  
3 2  
3 0 3  
2 5  
3 1 2  
- 70 -  
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Dimensions  
1 4 0  
9 9  
6 0 1 2 2  
7 0  
6 4  
6 8 8  
5 6 0  
3 0  
2 9 0  
1 6 1  
6 4  
4 4 0  
2 0  
3 1 8  
4 6 0  
6 8 8  
- 71 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Wall Mountedd Type  
1. Functions ....................................................................................73  
2. Operation Details........................................................................74  
3. Dimensions .................................................................................81  
- 72 -  
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Functions  
1. Functions  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (THERMISTOR)  
Room temperature control  
• Maintains the room temperature in accordance with the Setting temperature  
Starting Current Control  
• Indoor fan is delayed for 5 sec at the starting.  
Indoor Fan Speed Control  
• High, Med, Low, CHAOS  
Operation indication Lamps (LED)  
Signal Receptor  
Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.)  
Operation Indication Lamps  
On/Off  
Sleep Mode  
Timer  
: Lights up during the system operation.  
: Lights up during Sleep Mode Auto operation.  
: Lights up during Timer operation.  
Defrost Mode  
Temperature  
: Lights up during Defrost Mode or Hot Start operation.  
: Indicate the setting temperature.  
Soft Dry Operation Mode  
• Intermittent operation of fan at low speed.  
Sleep Mode Auto Control  
• The fan is switched to low(Cooling), med(Heating) speed.  
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.  
Defrost(Deice) control (Heating)  
Natural Air Control by CHAOS Logic  
• Both the indoor and outdoor fan stops dur-  
• The fan is switched to intermittent or irregular operation  
ing defrosting.  
•
The fan speed is automatically switched from high to low speed.  
Hot-start Control (Heating)  
• The indoor fan does not rotate until the  
evaporator pipe temperature will be reached  
at 28°C.  
Airflow Direction Control  
• The louver can be set at the desired position or swing  
up and down automatically.  
- 73 -  
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Operation Details  
2. Operation Details  
Function of Controls  
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  
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  
• 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.  
I 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 com-  
pressor not running, operating with the low airflow speed regardless of the setting.  
- 74 -  
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Operation Details  
I 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 ≤ 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 dehumidification  
operation 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.  
I 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  
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, with  
the 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 , it  
operates with the low airflow speed.  
• While in defrost control, both of the indoor and outdoor fans are turned off.  
I Defrost Control  
• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to  
defrost the outdoor unit.  
I 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 setting  
temp, 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 the  
intake air temp at that time.  
- 75 -  
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Operation Details  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-  
ature  
I 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 only  
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air  
temp at that moment as follows.  
24°C ≤ Inatake Air Temp  
21°C ≤ Inatake Air Temp<24°C => Fuzzy Operation for Dehumidification  
Inatake Air Temp<21°C => Fuzzy Operation for Heating  
=> Fuzzy Operation for Cooling  
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10  
sec 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 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 the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• 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  
the setting temp, 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  
- 76 -  
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Operation Details  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the  
intake air temp at that time.  
26°C ≤ Intake Air Temp  
=> 25°C  
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, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in  
dehumidification 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°C  
Compressor OFF Temp => Setting Temp. +4°C  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the  
intake air temp at that time.  
20°C ≤ Intake Air Temp => Intake Air Temp + 0.5°C  
Intake Air Temp < 20°C => 20°C  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the  
intake air temperature and the setting temperature.  
I 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.  
I 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.  
I 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.  
- 77 -  
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Operation Details  
I 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.  
I 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 temperature  
increases 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 to  
the low.  
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to  
the medium.  
I 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.  
I 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.”  
I 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.  
• During the JET COOL function at any moment, the A/C starts to blow the cool air with side louvers closed at  
extremely high speed for 30 minutes setting the room temp. automatically to 18°C.  
I 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, 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.  
• During the JET HEAT function at any moment, the A/C starts to blow the hot air with side louvers closed at  
extremely high speed for 60 minutes setting the room temp. automatically to 30°C.  
I 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  
- State of Operation ON/OFF  
- 78 -  
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Operation Details  
- Operation Mode/Setting Temp/Selected Airflow Speed  
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)  
I 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.  
Heat pump Model  
Cooling Model  
Room Temp. ≥ 24°C 21°C ≤ Room Temp. < 24°C Room Temp. < 21°C  
Operating mode  
Indoor Fan Speed  
Setting Temperature  
Cooling  
High  
Cooling  
High  
Healthy Dehumidification  
Heating  
High  
High  
22°C  
22°C  
23°C  
24°C  
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to  
indicate the forced operation.  
I 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.  
I 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 indoor  
evaporator pipe from frosting.  
• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the  
outdoor fan is turned on according to the condition of the room temperature.  
I 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 the  
remote control signal cannot be received.  
- 79 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I 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 be  
stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage Generator(H.V.B)  
will be operated again.  
- 80 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
3. Dimensions  
2 8 2  
2 6 5  
1 6 5  
- 81 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
2 8 1  
3 0 0  
- 82 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Ceiling & Floor  
Ceiling Suspended  
1. Funtions ......................................................................................84  
2. Operation Details........................................................................85  
3. Dimensions .................................................................................88  
- 83 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Function  
1. Function  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
•
Maintains the room temperature in accordance with the Setting Temperature.  
• Indoor fan is delayed for 5 seconds at the starting.  
• High, Med, Low  
• Intermittent operation of fan at low speed.  
• Although the air-conditioner is turned off by a power failure, it is restarted auto-  
matically previous operation mode after power supply.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator piping  
temperature reaches 25°C.  
Hot-start Control (Heating)  
High head height Drain pump  
Central Control(Optional)  
• A standard drain-head height of up to 700mm is possible.  
•
It is operating individually or totally by central control function.  
- 84 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
2. Operation Details  
(1) The function of main control  
I 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.  
I 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.  
Intake Air Temperature  
SET TEMPERATURE +0.5°C  
(Thermo. ON)  
SET TEMPERATURE -0.5°C  
(Thermo. OFF)  
More than  
3 minutes  
More than  
3 minutes  
Selecting  
fan speed  
Selecting  
fan speed  
Selecting  
fan speed  
INDOOR FAN  
Low  
OFF  
Low  
OFF  
COMPRESSOR  
ON  
ON  
ON  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 85 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor unit  
Heat-Exchanger  
40°C  
temperature  
T ST  
A
T LT  
T Off  
T On  
Intake Air Temperature  
3min  
Low fan during 10sec  
B
Setting Temperature  
+3°C  
(Thermal OFF)  
Setting Temperature  
(Thermal ON)  
Minimum  
3min  
1min  
1min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
C
Setting  
fan  
Setting  
fan  
Setting  
fan  
Indoor fan  
4way valve  
Off Low Low  
Low  
Low Off  
Off Low  
spped  
spped  
spped  
ON  
• 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.  
A
-
-
For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.  
B
C
To be operated "Low" except initial Hotstart operation  
High Static  
Low Static  
B2 CE  
Convertible  
VE  
Chassis  
BH  
BG  
BR  
B1  
CF  
VJ  
Hotstart On  
Hotstart Off  
T On  
T Off  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C 19°C 19°C 19°C  
22°C 22°C 22°C 22°C  
25°C 25°C 25°C 25°C  
27°C 27°C 27°C 27°C  
26°C  
27°C  
28°C  
30°C  
26°C  
27°C  
28°C  
30°C  
Low temperature T LT  
Setting Temperature T ST  
- 86 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I 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.  
Indoor unit  
Heat-Exchanger  
temperature  
Hotstart Off  
Hotstart On  
1 min  
Low  
1 min  
Low  
Thermal  
Outdoor fan  
ON  
ON  
Setting fan  
speed  
Setting fan  
speed  
Indoor fan  
Off  
Off  
ON  
4way Valve  
• Initial Hotstart On state  
➀ Power Off ➠ On  
➁ Operation Off ➠ On  
➂ Cooling operation ➠ Heating operation  
➃ Defrost operation  
- 87 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
3. Dimensions  
2 7 3  
2 4  
4 9 0  
- 88 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
6 5 0  
- 89 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Floor Standing Type  
1. Function ......................................................................................91  
2. Operation Details........................................................................92  
3. Dimensions .................................................................................95  
- 90 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Function  
1. Function  
Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (Thermistor)  
Room temperature control  
Starting Current Control  
Indoor Fan Speed Control  
Soft Dry Operation Mode  
•
Maintains the room temperature in accordance with the Setting Temperature.  
• Indoor fan is delayed for 5 seconds at the starting.  
• High, Med, Low  
• Intermittent operation of fan at low speed.  
• Although the air-conditioner is turned off by a power failure, it is restarted auto-  
matically previous operation mode after power supply.  
Auto Restart  
• Both the indoor and outdoor fan stops during defrosting.  
• Hot start after defrost ends.  
Deice (defrost) control (Heating)  
• The indoor fan does not rotate until the evaporator piping  
temperature reaches 25°C.  
Hot-start Control (Heating)  
High head height Drain pump  
Central Control(Optional)  
• A standard drain-head height of up to 700mm is possible.  
•
It is operating individually or totally by central control function.  
- 91 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
2. Operation Details  
(1) The function of main control  
I 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.  
I 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.  
Intake Air Temperature  
SET TEMPERATURE +0.5°C  
(Thermo. ON)  
SET TEMPERATURE -0.5°C  
(Thermo. OFF)  
More than  
3 minutes  
More than  
3 minutes  
Selecting  
fan speed  
Selecting  
fan speed  
Selecting  
fan speed  
INDOOR FAN  
Low  
OFF  
Low  
OFF  
COMPRESSOR  
ON  
ON  
ON  
Thermal ON  
ST+0.5  
Thermal OFF  
ST-0.5  
Indoor Unit mode  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST+0.5  
To be selected higher temperature  
contrast Indoor Unit and Remo.  
ST-0.5  
2TH (Remo.+Indoor)  
Remo. Mode  
- 92 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I Heating Mode Operation  
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.  
Indoor unit  
Heat-Exchanger  
40°C  
temperature  
T ST  
A
T LT  
T Off  
T On  
Intake Air Temperature  
3min  
Low fan during 10sec  
B
Setting Temperature  
+3°C  
(Thermal OFF)  
Setting Temperature  
(Thermal ON)  
Minimum  
3min  
1min  
1min  
Thermal  
ON  
ON  
OFF  
OFF  
ON  
ON  
Outdoor fan  
C
Setting  
fan  
Setting  
fan  
Setting  
fan  
Indoor fan  
4way valve  
Off Low Low  
Low  
Low Off  
Off Low  
spped  
spped  
spped  
ON  
• 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.  
A
-
-
For eluminating latent heat-loss, fan operates at low speed for 10 seconds periodically.  
B
C
To be operated "Low" except initial Hotstart operation  
High Static  
Low Static  
B2 CE  
Convertible  
VE  
Chassis  
BH  
BG  
BR  
B1  
CF  
VJ  
Hotstart On  
Hotstart Off  
T On  
T Off  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C  
22°C  
25°C  
27°C  
19°C 19°C 19°C 19°C  
22°C 22°C 22°C 22°C  
25°C 25°C 25°C 25°C  
27°C 27°C 27°C 27°C  
26°C  
27°C  
28°C  
30°C  
26°C  
27°C  
28°C  
30°C  
Low temperature T LT  
Setting Temperature T ST  
- 93 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Operation Details  
I 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.  
Indoor unit  
Heat-Exchanger  
temperature  
Hotstart Off  
Hotstart On  
1 min  
Low  
1 min  
Low  
Thermal  
Outdoor fan  
ON  
ON  
Setting fan  
speed  
Setting fan  
speed  
Indoor fan  
Off  
Off  
ON  
4way Valve  
• Initial Hotstart On state  
➀ Power Off ➠ On  
➁ Operation Off ➠ On  
➂ Cooling operation ➠ Heating operation  
➃ Defrost operation  
- 94 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
3. Dimensions  
6 3 5  
2 0 . 4  
7 0  
6 2 . 8  
4 9  
6 3 9  
- 95 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Dimensions  
6 3 5  
2 0 3  
7 0  
1 4 5  
8 1 . 4  
4 9 . 4  
7 0  
2 1 . 4  
6 3 9  
- 96 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Part 3  
Trouble shooting guide  
- 97 -  
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LGE Internal Use Only  
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Trouble shooting guide  
Self-diagnosis function.....................................................................99  
- 98 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Only for training and service purposes  
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Self-diagnosis function  
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 Display  
1st,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 slave2  
011 ¡ 051 : No.105 error of master unit  
Display  
Title  
Cause of Error  
0
1
2
-
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  
Air temperature sensor of indoor unit  
Inlet pipe temperature sensor of indoor unit  
0
0
0
0
-
-
-
-
Transmission error : wired remote controller  
↔ indoor unit  
3
4
5
Drain pump  
Malfunction of drain pump  
Transmission error : outdoor unit ↔ indoor  
unit  
Failing to receive outdoor unit signal in indoor unit PCB  
0
0
6
7
-
-
Outlet pipe temperature sensor of indoor unit  
Different operation mode  
Serial No.  
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  
0
1
1
9
0
1
-
-
-
Poor fan motor operation  
Disconnecting the fan motor connector/Failure of indoor fan motor  
lock  
Transmission error: indoor unit ¡ main PCB  
of outdoor.  
When the addressing signal doesn't respond for 3mins. suddenly,  
while the indoor unit gets the calling signal from the outdoor unit,  
- 99 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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LGE Internal Use Only  
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Self-diagnosis function  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
01  
02  
06  
Indoor unit air sensor error  
1. Indoor unit PCB wrong connection  
2. Indoor unit PCB failure  
Indoor unit sensor is  
open/short  
Indoor unit pipe inlet sensor error  
Indoor unit pipe outlet sensor error  
3. Sensor problem (main reason)  
I Error diagnosis and countermeasure flow chart  
No  
Is sensor properly  
Connect properly to PCB  
connected to PCB?  
Yes  
No  
Is the resistance value  
of sensor normal?*  
Change the sensor  
Yes  
Change the PCB  
** 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) ➔ Normal  
Air temp sensor: 10°C = 20.7kΩ : 25°C= 10kΩ : 50°C= 3.4kΩ  
Pipe temp sensor: 10°C = 10kΩ : 25°C= 5kΩ : 50°C= 1.8kΩ  
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.  
- 100 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
1. Remote controller fault  
The remote controller  
did not receive the sig-  
nal from indoor unit  
during specific time  
2. Indoor unit PCB fault  
03  
No transmission between cabled  
remote controller & indoor unit  
3. Connector fault, Wrong connection  
4. transmission cable problem  
I Error diagnosis and countermeasure flow chart  
Does the error happens  
again if the remote  
controller is replaced?*  
No  
Replace cabled remote  
controller  
Yes  
Does the error occurred  
when the cable of remote  
controller is replaced?  
No  
Check connection &  
transmission cable **  
Yes  
Replace indoor unit PCB ***  
* 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 cause  
Check 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  
: Remote controller connection  
CN-REMO  
❇ The PCB can differ from model to model.  
Check from the right source.  
Checking transmission cable connection status  
- 101 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
1. Drain pump/float switch fault  
Float switch is open due to  
rising of condensate water  
level because of drain  
pump fault or drain pipe  
clogging  
2. Improper drain pipe location, clog-  
ging of drain pipe  
04  
Drain pump error  
3. Indoor unit PCB fault  
I Error diagnosis and countermeasure flow chart  
Is the drain pan filled  
Is Float switch short  
On measuring its  
resistance?  
No  
No  
half with condensate  
water? (half level of  
float switch)*  
Replace float switch  
Yes  
Yes  
Replace Indoor PCB or  
reconnect the connector  
In indoor unit PCB  
Does the terminal voltage  
for drain pump has  
220V output?**  
No  
No  
Is drain pump working?  
(Sound/drain noise/  
contact etc.)  
Replace indoor unit PCB  
Yes  
Yes  
Replace Drain Pump  
N o  
Drain pump blocked by  
foreign particles?  
Check the drain head height  
and slope***  
Checking float  
sw itch  
Yes  
(Low position➠ short 0 ohm )  
Remove it & clean the pump  
* If the float goes up higher than a half of float  
switch then the circuit is open & the unit is  
stopped automatically.  
float  
(High position➠O pen)  
Condensate w ater  
- 102 -  
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Self-diagnosis function  
float  
*** Indoor PCB drain pump connector  
A:Point to check rotating  
(Check input of 220V)  
(Marked as CN-DPUMP)  
Float switch connector  
Float switch Housing (CN-FLOAT)  
[***] Standard of drain pipe head height / slope  
MAX 450  
- 103 -  
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LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
Error  
Error Type  
No.  
Error Point  
Main Reasons  
1. Auto addressing is not done  
2. transmission cable is not connected  
3. Short circuit of transmission cable  
4. Indoor unit transmission circuit fault  
5. Outdoor unit transmission circuit fault  
6. Not enough distance between power and trans-  
mission cable?  
No signal transmission  
between indoor & outdoor  
units.  
Indoor & Outdoor unit  
05  
transmission error  
I Error diagnosis and countermeasure flow chart  
Replace the PCB of indoor unit  
No  
No  
displayed error  
No  
Is total number of indoor  
units connected displayed  
after auto addressing?  
Does all the IDUs show  
same error code CH05?  
Re-connect after check the  
transmission cable of indoor  
unit displayed error**  
Yes  
END  
Replace outdoor PCB after  
checking  
Check the main power  
supply at the ODU  
terminal block?  
No  
Is outdoor PCB LED  
blinking?  
Replace TRANS after checking  
Yes  
Yes  
Check the insulation of inverter  
/ constant compressor and replace  
if required  
No  
Is main circuit breaker off?  
Yes  
Check the capacity of main circuit  
breaker and replace if required  
Improper connection of power supply cable  
Main power supply problem  
If all ok,  
Turn on main circuit breaker  
Check if the  
transmission cable is  
properly connected  
to indoor / outdoor  
terminal block?*  
No  
Re connect transmission cable  
Outdoor PCB fault  
Replace after checking  
Yes  
Indoor PCB fault  
Replace 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  
* If the DC voltage between transmission terminal A, B  
of indoor unit is fluctuate within (-9V~+9V) then  
transmission from outdoor unit is normal  
- 104 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
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Self-diagnosis function  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
Refer to CH02  
Indoor unit outlet pipe  
temperature sensor open  
or short  
Indoor unit outlet pipe  
temperature sensor  
error  
06  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
1. Indoor units are in different mode  
2. PCB fault  
3. cabled remote controller fault  
❊ Checking ch07 method  
The Indoor units started  
later are operated in dif-  
ferent mode from earlier  
one.  
All Indoor units are not  
running in same mode  
07  
IDU doesn’t operate as Operation mode is  
flickering at IDU wired remote controller and IDU  
display window.  
I Error diagnosis and countermeasure flow chart  
Does error code  
Is operation mode of  
No  
No  
disappear  
outdoor & Indoor units  
after set operation  
same?  
Replace Indoor PCB***  
mode same?**  
Yes  
Yes  
END  
Adjust outdoor main PCB  
dip switch setting *  
* 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.  
o Dip switch Setting o  
ON  
ON  
1
1
2
2
3
3
4
4
5
5
6
6
7
7
1
8
2
9
3
4
5
6
7
10 11 12 13 14  
ON  
ON  
1
1
2
2
3
3
4
4
5
5
6
6
7
7
1
8
2
9
3
4
5
6
7
10 11 12 13 14  
*** 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 operation  
mode. The error will disappear.  
- 105 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
LGE Internal Use Only  
Only for training and service purposes  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
**** 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.  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
1. Error developed in transmission between the  
micro- processor and the EEPROM on the sur-  
face of the PCB.  
Indoor unit EEPROM  
error  
09  
2. ERROR due to the EEPROM damage  
I Error diagnosis and countermeasure flow chart  
- Replace the indoor unit PCB, and then make sure to perform Auto addressing and input the address of central control  
- 106 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
Error  
No.  
Error Type  
Error Point  
Main Reasons  
Indoor unit BLDC fan motor  
failure  
Indoor BLDC fan motor  
feedback signal is absent  
(for 50 sec.)  
1. Motor connector connection fault  
2. Indoor PCB fault  
3. Motor fault  
10  
I Error diagnosis and countermeasure flow chart  
Is connector  
connection proper?  
No  
Connect properly  
Yes  
No  
Is fan motor  
normal?*  
Replace indoor unit fan motor  
Yes  
Replace indoor unit PCB **  
* It is normal when check hall sensor of indoor fan motor as shown below  
Each termainl with the tester  
Normal resistance( 10%)  
Tester  
+
-
TH chassis TD chassis  
1
5
6
7
4
4
4
4
∞
∞
k
hundreds kΩ hundreds kΩ  
∞
∞
hundreds kΩ hundreds kΩ  
1
4
5
6
7
<Checking connection state of fan motor connector>  
** 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)  
- 107 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Self-diagnosis function  
Error  
No.  
Error Type  
Indoor unit transmission error  
Error Point  
Main Reasons  
1. Indoor 485 transmission PCB fault  
Indoor unit doesn’t get sig-  
nal from ODU for 3 minutes  
continuously  
11  
2. After PCB replacing, auto addressing  
was not done  
I Error diagnosis and countermeasure flow chart  
After ODU main PCB  
reset, error code  
disappears?  
No  
No  
After Auto addressing,  
error code disappears?  
Replace indoor unit 485  
transmission PCB  
Yes  
Yes  
END  
- 108 -  
Copyright ©2008 LG Electronics. Inc. All right reserved.  
Only for training and service purposes  
LGE Internal Use Only  
Download from Www.Somanuals.com. All Manuals Search And Download.  
APRIL, 2008  
P/NO : MFL50459501  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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