To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
■ Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
■ Installation
Do not use a defective or underrated circuit breaker. Use this
appliance on a dedicated circuit.
• There is risk of fire or electric
shock.
Always install a dedicated circuit and breaker.
• Improper wiring or installation may
cause fire or electric shock
Always ground the product.
• There is risk of fire or electric
shock.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric
shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric
shock.
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
4Ceiling Cassette Air Conditioner
Safety Precautions
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
Be cautious when unpacking
and installing the product.
• Sharp edges could cause injury.
Be especially careful of the case
edges and the fins on the condenser and evaporator.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air conditioner could fall with it, causing
property damage, product failure,
and personal injury.
For installation, always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• Moisture may condense and wet or
damage furniture.
■ Operational
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
Do not place a heater or other
appliances near the power
cable.
• There is risk of fire or electric
shock.
Do not let electric parts of the
product get wet.
• There is risk of fire, failure of the
product, or electric shock.
Service Manual 5
Safety Precautions
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
Gasolin
Do not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter,
if the unit is so equipped.)
• There is risk of physical injury, electric shock, or product failure.
If strange sounds, or small or smoke comes
from product. Turn the breaker off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product damage.
■ Installation
Always check for gas (refrigerant) leakage after
installation or repair of product.
• Low refrigerant levels may cause failure of product.
6Ceiling Cassette Air Conditioner
Install the drain hose to ensure that water is
drained away properly.
• A bad connection may cause water leakage.
Safety Precautions
Keep level even when installing the product.
• To avoid vibration or water leakage.
90˚
■ Operational
Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
• There is risk of fire, electric shock, or damage to the
plastic parts of the product.
Use two or more people to lift and transport
the product.
• Avoid personal injury.
Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!
• There is risk of personal injury.
Thinner
Wax
Do not step on or put anyting on the product.
(outdoor units)
• There is risk of personal injury and failure of product.
Do not insert hands or other objects through
the air inlet or outlet while the product is operated.
• There are sharp and moving parts that could cause
personal injury.
Service Manual 7
Features & Benefits
12 16........
........
IonizerPre-filter
Dust particles
dusts
Odour
Dust
electrode
discharge
Odor molecule
+6.5KV
discharge
aluminum coated
electrode(-)
(3.25KV discharge)
Generating
plasma
+
+
+
+
+
Dusts Collection
Polluted
Air
Purified
fresh Air
Main
PCB
Controller
# 1
Controller
# 2
Controller
# 8
M
1
Sub
1
M
2
Sub
2
M
16
Sub
16
M
17
Sub
17
M
18
Sub
18
M
128
Sub
128
Features & Benefits
Environment Friendly Refrigerant :
- LG Ceiling Cassette Air Conditioners uses environment friendly refrigerant, which don't do any harm to
the environment.
Plasma Air Purifier :
- It removes not only microscopic contaminants &
dust, but also house mites, pollen, and pet fur to help
preventing allergic diseases like asthma.It provides
odor free, dust free and allergy free air.
Group Control :
- It enables to control as much as 16 units with the
help of one wired remote controller. All the units will
follow same setting of temperature & other sub functions.
Central Control :
- It enables to control 16 x 8 = 128 units with the help
of 8 controllers. All units can be put on and off from
one Central Room. For Setting Temperature, Fan
Speed and other sub functions, access the respective LCD wired remote controller of each unit.
Jet Cool :
-In this mode, quick and fast cooling is done. Cold and
high velocity air is supplied to the room till the indoor
temperature reaches 18°C. The unit will continue to
run in jet cool mode till the Indoor temperature reaches 18°C.
8Ceiling Cassette Air Conditioner
Swirl Swing
71
Vane 2
Swirl Swing(New)4- Open(Conventional)
Swirl Swing(New)4- Open(Conventional)
2.4%4.8%100% Improved
Comparison of Air Flow Types
Comparison of Floor
Temp. Distribution(20°C)
Vane 1 Close OpenOpen
Open
Open
Open
CloseCloseOpen
Vane 3 Close Open CloseCloseOpen
OpenOpen CloseCloseOpen
Vane 2
OpenOpen
Time
CloseCloseOpen
Vane 4
Vane 1
Vane 3
Vane 2
Time
Vane 4
Vane 3
Vane 4
Vane 1
- It is the function for comfort cooling/heating operation.
- The diagonal two louvers are opened the
more larger than the other louvers.
After one minute, it is opposite.
Space Control
Vanes angle can be controlled by pair, considering its
installation environment.
- For example direct drafts can be annoying, leading
to discomfort and reduced productivity vane control
helps to eliminate this problem.
- Easily controlled by wired remote control.
- Air Flow can be controlled easily regarding any
space environment.
Features & Benefits
Auto Restart Operation :
- Whenever there is electricity failure to the unit, and after resumption of the power, unit will start in the same
mode prior to the power failure. Memorized condition are on / off condition, operating mode (cooling/heating),
set temperature and fan speed.The unit will memorize the above conditions and start with same memorized
condition.
Two Thermistor Control :
- There may be a significant difference between the temperature taken at the installed product and indoor temperature. Two thermistor control provides option to control temperature by referring any of the two temperatures. With the help of the slide switch at the back of the LCD wired remote controller, selection of the desired
thermistor for controlling the unit can be done. One thermistor is in the Indoor unit & the other one is in the
LCD wired remote.
Service Manual 9
Features & Benefits
5~6W
OthersLG
0.5W
CHILD LOCK
-Display
High Ceiling Operation
- According to the height of ceiling installation, it provides variability of indoor fan motor rpm. If the height
of installation is low then you can adjust low rpm of
indoor fan motor. On the other hand if the height of
the installation is high you can adjust high rpm of
indoor fan motor. Selection of speed can be done by
slide switch at the back of the LCD wired remote.
ex:
Selection HeightRPM
Lower2.4m700/600/500
Standard2.7m750/650/550
Higher3.0m800/700/600
Water Drain Pump :
- In some of the places natural drainage is not possible. For such places drain pump is very useful. It
removes condensed water from the unit.
Time Delay Safety Function :
- It delays restarting of the compressor by three minutes thereby preventing damage to the compressor.
Zero Standby Power:
- Due to SMPS (Switching Modulation Power Supply)
technology, there is almost zero power consumption
in the standby mode.
Child Lock Function:
-It prevents the children or others from tampering the
control buttons. Unit can be controlled by the wireless
remote controller. This can be easily set by pressing
timer key & Min key simultaneously. After child lock is
set, pressing any key will displaye CL on the LCD for
3 seconds and all the keys will be ineffective.
Self Diagnosis Function:
- This function provides diagnosis of the unit. An
error code will be displayed on the LCD wired
remote controller & diagnosis can be done as per
the code indication. The same is also printed on
key cover of the LCD wired remote controller.
10Ceiling Cassette Air Conditioner
List of Functions
• Ceiling Cassette
List of Functions
Features
Air Discharge Outlet44
Airflow Direction control (left & right)-Airflow Direction control (up & down)AutoAuto
Airflow Steps(Fan / Cool /Heat)3/4/-3/4/Auto Changeover-Auto Operationoo
Auto Restart Operationoo
Auto Swingoo
Central ControlAccessoryAccessory
CHAOS Wind (Auto wind)-Child Lock Functionoo
Cooling & Fan Operationoo
Coolling, heating & Fan Operation-Defrost / Deicing-Deodorizing Filter-Drain Pumpoo
E.S.P. Control-Electric Heater-Energy Saving Gold Fin-Environment Friendly Refrigerantoo
Fire Alarm Function-Forced Operationoo
Group Controloo
High Ceiling Operationoo
Hot Start-Jet Cool-Low Ambient Control-Plasma Air PurifierOptionalOptional
Prefilter(Washable / Anti-fungus)oo
Restart Delay (3-minutes)oo
Self Diagnosisoo
Sleep Modeoo
Soft Dry Operationoo
Swirl Swingoo
Tele Control-Temperature Controloo
Test Functionoo
Time Delay Safety functionoo
Timer (weekly)oo
Two Thermistor Controloo
Space Controloo
Wired LCD Remote Controlleroo
Wireless Remote Controlleroo
Zero Standby Poweroo
Zone Control--
ModelCeiling Cassette
LC240CPLC380CP
Notes :
O : Basic
Optional : Factory-Installed
Accessory : Field-Installed
- : Not available on this system
Service Manual 11
Function of Remote Control
Cooling Operation
Auto Operation
Healthy Dehumidification Operation
Operation Mode
ON
OFF
CANCEL
SET
°C/°F
AUTO CLEAN
1
3
5
4
9
10
12
18
16
7
2
8
13
15
11
6
Flip-up door
(opened)
Signal transmitter
17
14
Function of Remote Control
1. Wireless LCD Remote Control
1. START/STOP BUTTON
Operation starts when this button is pressed and
stops when the button is pressed again.
2. OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3. ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
4. INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium and high.
5.
JET COOL
Used to start or stop the speed cooling.(speed cooling
operates super high fan speed in cooling mode.)
6. AUTO SWING BUTTON
Used to stop or start louver movement and set the
desired up/down airflow direction.
7. ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
8. TIME SETTING BUTTONS
Used to adjust the time.
9. TIMER SET/CANCEL BUTTON
Used to set the timer when the desired time is
obtained and to cancel the Timer operation.
10. SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
11. AIR CIRCULATION BUTTON
Used to circulate the room air without cooling.
12. ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
13. PLASMA AIR CLEAN BUTTON
Used to start or stop the plasma-purification function.
14. HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (OPTIONAL)
Used to set the desired horizontal airflow direction.
15. RESET BUTTON
Used prior to resetting time.
16. 2nd F Button
Used prior to using modes printed in blue at the bottom of buttons.
17. AUTO CLEAN (OPTIONAL)
Used to set Auto Clean mode.
18. °C/°F SWITCH BUTTON
Used to switch temperature reading from Centigrade
to Fahrenheit.
12Ceiling Cassette Air Conditioner
❈ The wireless remote controller do not operate the swirl mode.❈ The wireless remote controller do not operate the swirl mode.
Timer Cancel 2ndF
Program Week
HourMin
Holiday
Set/Clr
RESET
Plasma
Operation unit
Humidify
AUTO SWING OPERATION
FAN SPEED
Program set
SUB FUNCTION
SET TEMP
Room Temp
HI
MED
LO
Heater
Defrost
Filter
Preheat
Out door
Time
Timer
On
Set no. Time
Off
01 03 05 07 09 11 13 15 17 19 21 23
3
10
12
14
15
11
13
18
16
2
1
5
4
8
9
7
17
1234
ZONE
2ndF
No Func
AUTO
JET
SLo
2. Wired LCD Remote Control
Function of Remote Control
1 Operation display
Displays the operation conditions.
2 On/Off Button
Operation starts when this button is pressed, and
stops when the button is pressed again.
3 Set Temperature Button
Used to set the temperature when the desired temperature is obtained.
4 FAN Operation Button
Used to circulate room air without cooling.
5 Fan Speed & Jet Cool Button
Used to set the desired fan speed and select jet
cool mode.
6 Operation Mode Selection Button
Used to select the operation mode.
• Auto Operation Mode
• Cooling Operation Mode
• Soft Dry Operation Mode
7 Auto Swing Button
Used to swing up and down.
8 Room Temperature Checking Button
Used to check the room temperature.
9 Plasma Air Clean Button
Used to start or stop the plasma-purification function.
10 Timer Cancel Button
Used to cancel the timer.
11 Timer Set Button
Used to set the timer when the desired time is
obtained.
12 Week Button
Used to set a day of the week.
13 Program Button
Used to set the weekly timer.
14 Holiday Button
Used to set a holiday of the week.
15 Time Set Button
Used to set the time of the day and change the
time in the weekly timer Function.
16 Set and Clear Button
Used to set and clear the weekly timer.
17 Swirl Button
Used to select swirl swing mode.
18 Reset Button
❈ The wireless remote controller do not operate the swirl
mode.
Used to set the current time and clear the setting
time.
Service Manual 13
Specifications
Specifications
System
Cooling Capacity
Heating Capacity
Input Cooling/HeatingW
Running CurrentCooling/HeatingA
Power Supplyø,V,Hz
Power Factor%
E.E.RCooling
C.O.PHeating
Setting Temperature Range(cool/heat)°C
Dehumidification Ratel/h
Refrigerant Control
Refrigerant Charge g(oz), type
Indoor UnitLCN240CP
Indoor fan motor
Indoor Fan
Indoor Fan RPM
Air Circulation Indoor (H/M/L)CMM(CFM)
Noise Level
(Sound Press,1m)
Temperature Controller
Indoor CoilFins per inch
Dimensions (W*D*H)
Net WeightIndoor kg(lbs)
Outdoor UnitLCU240CP
CompressorCapacityW(Btu/h)
Outdoor CoilFins per inch
Outdoor fan motor
Outdoor Fan
Air Circulation Outdoor CMM(CFM)
Noise Level
(Sound Press,1m)
SVC Valve
Dimensions (W*H*D)Outdoorinch(mm)
Net WeightOutdoorkg(lbs)
Others
Power Supply Cable(With Earth Cable)
Conncecting Cable(With Earth Cable)
Connecting Tube
(ø. Socket Flare)
Drain hose (ID ø)
Notes: 1. Capacities are based on the following conditions:
Cooling:- Indoor Temperature 26.7°C(80.0°F) DB /19.4°C(67.0°F) WB
2. Due to our policy of innovation some specifications may be changed without notification.
Indoor Unit
Outdoor Unit
Decoration Panel
OutputW
Model
No. of Poles
InputW
Running CurrentA
CapacitorµF/Vac
Type
No. Used / DiameterEA/mm(inch)
Cooling(H/M/L)rpm
Heating(H/M/L)rpm
Indoor(H/M/L)dB(A)±3
Tube Size (OD)inch(mm)
No. of Rows & Column
Indoorinch(mm)
Panel inch(mm)
Locked Rotor Amp.A
Type
QuantityNo.
Model
Maker
Motor Type
Motor InputW
Oil Type
Oil Chargecc
O.L.P Type(Model Name)
Tube Size (OD)inch(mm)
No. of Rows & Column
OutputW
Model
No. of Poles
InputW
Running CurrentA
CapacitorµF/Vac
Type
No. Used / DiameterEA/inch(mm)
DischargeSide / Top
Speedrpm
Outdoor dB(A)±3
Liquid
Gas
Liquid Sideinch(mm)
Gas Side inch(mm)
Length, stdm
Max length/elevationm
Indoor Unitmm
Outdoor Unitmm
- Outdoor Temperature 35.0°C(95.0°F) DB /23.9°C(75.0°F) WB
- Interconnecting Piping Length 7.5m
- Level Difference of Zero.
W(kcal/h)
Btu/h
W(kcal/h)
Btu/h
W/W(kcal/hW)
Btu/hW
W/W(kcal/hW)
Btu/hW
inch(mm)
2
No.* mm
LCN240CP
LCU240CP
7,034(6,048)
1, 208-230, 60
2.81(2.42)
18~30(64-86)
Capillary Tube
Turbo Fan
1/382(15)
600 / 540 / 480
15.0/14.0/13.0(530/494/459)
43/41/39
Thermistor
29.3*29.4*11.5(744*744*292)
33.5*33.5*1.18(850*850*30)
3,531(12,050)
1/18.1(460)
Side Discharge
1 / 4 (6.35)
1 / 2 (12.7)
34.2*25.8*12.6(870*655*320)
57(125.6)
1 / 4 (6.35)
1 / 2 (12.7)
PT-CFC
24000
-
-
2500
11.5
93
9.6
-
-
3.3
40.3
6
121
0.53
4.0/ 440
-
0.275(7)
21
2R 12C
24(52.9)
62
Rotary
2
GK120K
LG
PSC
1220
FVC68D
700
External
0.275(7)
20
2R 36C
67.2
6
120
0.54
6 / 370
Propeller
850
58(2048)
55
3 * 2.1
4 * 2.1
7.5
30/15
ø25
-
14Ceiling Cassette Air Conditioner
Specifications
System
Cooling Capacity
Heating Capacity
Input Cooling/HeatingW
Running CurrentCooling/HeatingA
Power Supplyø,V,Hz
Power Factor%
E.E.RCooling
C.O.PHeating
Setting Temperature Range(cool/heat)°C
Dehumidification Ratel/h
Refrigerant Control
Refrigerant Charge g(oz), type
Indoor UnitLCN380CP
Indoor fan motor
Indoor Fan
Indoor Fan RPM
Air Circulation Indoor (H/M/L)CMM(CFM)
Noise Level
(Sound Press,1m)
Temperature Controller
Indoor CoilFins per inch
Dimensions (W*D*H)
Net WeightIndoor kg(lbs)
Indoor Unit
Outdoor Unit
Decoration Panel
OutputW
Model
No. of Poles
InputW
Running CurrentA
CapacitorµF/Vac
Type
No. Used / DiameterEA/mm(inch)
Cooling(H/M/L)rpm
Heating(H/M/L)rpm
Indoor(H/M/L)dB(A)±3
Tube Size (OD)inch(mm)
No. of Rows & Column
Indoorinch(mm)
Panel inch(mm)
W(kcal/h)
Btu/h
W(kcal/h)
Btu/h
W/W(kcal/hW)
Btu/hW
W/W(kcal/hW)
Btu/hW
LCN380CP
LCU380CP
PT-CDC
11,137(9,576)
38000
-
-
4000
18.3
1, 208-230, 60
93
2.78(2394)
9.5
-
-
18~30/(64-86)
4.0
Capillary Tube
52.5
6
175
0.76
4 / 450
Turbo Fan
1/460(18.1)
560 / 520 /480
-
25/23/21(883/812/742)
40/38/36
Thermistor
0.275(7)
21
2R 12C
33.0*33.0*11.3(840*840*288)
37.4*37.4*1.2(950*950*30)
33(72.7)
Outdoor UnitLCU380CP
CompressorCapacityW(Btu/h)
Outdoor CoilFins per inch
Outdoor fan motor
Outdoor Fan
Air Circulation Outdoor CMM(CFM)
Noise Level
(Sound Press,1m)
SVC Valve
Dimensions (W*H*D)Outdoorinch(mm)
Net WeightOutdoorkg(lbs)
Others
Power Supply Cable(With Earth Cable)
Conncecting Cable(With Earth Cable)
Connecting Tube
(ø. Socket Flare)
Drain hose (ID ø)
Locked Rotor Amp.A
Type
QuantityNo.
Model
Maker
Motor Type
Motor InputW
Oil Type
Oil Chargecc
O.L.P Type(Model Name)
Tube Size (OD)inch(mm)
No. of Rows & Column
OutputW
Model
No. of Poles
InputW
Running CurrentA
CapacitorµF/Vac
Type
No. Used / DiameterEA/inch(mm)
DischargeSide / Top
Speedrpm
Outdoor dB(A)±3
Liquid
Gas
Liquid Sideinch(mm)
Gas Side inch(mm)
Length, stdm
Max length/elevationm
Indoor Unitmm
Outdoor Unitmm
inch(mm)
No.* mm
2
63
Rotary
GJ176KGJ208K
18100
500500
35.4*48.2*14.6(900*1225*370)
2
LG
PSC
FVC68D
Internal
0.275(7)
18
2R 52C
72
6
151
0.63
6 / 370
Propeller
2/18.1(460)
Side Discharge
880
105(3708)
58
1 / 4 (6.35)
5 / 8 (15.88)
93 (205.0)
5 * 3.3
4 * 2.1
1 / 4 (6.35)
5 / 8 (15.88)
7.5
35/15
ø25
-
Notes: 1. Capacities are based on the following conditions:
Cooling:- Indoor Temperature 26.7°C(80.0°F) DB /19.4°C(67.0°F) WB
2. Due to our policy of innovation some specifications may be changed without notification.
- Outdoor Temperature 35.0°C(95.0°F) DB /23.9°C(75.0°F) WB