LG LC240CP Schematic

LG

Ceiling Cassette
Air Conditioner

SERVICE MANUAL

LG

CAUTION

website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html

• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

TABLE OF CONTENTS

Table of contents Page

1. Models List .......................................................................................................................3

2. Safety Precautions ...........................................................................................................4

3. Feature & Benefits ...........................................................................................................8

4. List of Functions .............................................................................................................11

5. Function of Remote Control ...........................................................................................12

6. Specifications .................................................................................................................14

7. Dimensional Drawings ...................................................................................................16

8. Wiring Diagrams.............................................................................................................20

9. Refrigerant Cycle Diagrams ...........................................................................................22

10. Installation ....................................................................................................................23

11. Trouble Shooting Guide................................................................................................33

12. (3-Way)Valve ................................................................................................................49

13. Electronic Control Device.............................................................................................53

14. Exploded View and Replacement Parts List ................................................................54

2 Ceiling Cassette Air Conditioner

Models List

1.1 Cooling Only

Models List

Nominal Capacity

Btu/h Type Model Name Model Name Ø,V,Hz

24K Ceiling Cassette LCN240CP LCU240CP
38K Ceiling Cassette LCN380CP LCU380CP

Indoor Units Outdoor Units Power Supply

1Ø, 208-230V, 60Hz

Service Manual 3

Safety Precautions

Safety Precautions

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.

4 Ceiling 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.

6 Ceiling 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.

8 Ceiling 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

Close CloseOpen

Vane 3 Close Open Close CloseOpen

OpenOpen Close CloseOpen

Vane 2

OpenOpen

Time

Close CloseOpen

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

Others LG

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 Height RPM

Lower 2.4m 700/600/500

Standard 2.7m 750/650/550

Higher 3.0m 800/700/600

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.

10 Ceiling Cassette Air Conditioner

List of Functions

• Ceiling Cassette

List of Functions

Features

Air Discharge Outlet 4 4
Airflow Direction control (left & right) - ­Airflow Direction control (up & down) Auto Auto
Airflow Steps(Fan / Cool /Heat) 3/4/- 3/4/­Auto Changeover - ­Auto Operation o o
Auto Restart Operation o o
Auto Swing o o
Central Control Accessory Accessory
CHAOS Wind (Auto wind) - ­Child Lock Function o o
Cooling & Fan Operation o o
Coolling, heating & Fan Operation - ­Defrost / Deicing - ­Deodorizing Filter - ­Drain Pump o o
E.S.P. Control - ­Electric Heater - ­Energy Saving Gold Fin - ­Environment Friendly Refrigerant o o
Fire Alarm Function - ­Forced Operation o o
Group Control o o
High Ceiling Operation o o
Hot Start - ­Jet Cool - ­Low Ambient Control - ­Plasma Air Purifier Optional Optional
Prefilter(Washable / Anti-fungus) o o
Restart Delay (3-minutes) o o
Self Diagnosis o o
Sleep Mode o o
Soft Dry Operation o o
Swirl Swing o o
Tele Control - ­Temperature Control o o
Test Function o o
Time Delay Safety function o o
Timer (weekly) o o
Two Thermistor Control o o
Space Control o o
Wired LCD Remote Controller o o
Wireless Remote Controller o o
Zero Standby Power o o
Zone Control - -

Model Ceiling Cassette

LC240CP LC380CP

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.

12 Ceiling 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

Hour Min

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/Heating W
Running Current Cooling/Heating A
Power Supply ø,V,Hz
Power Factor %

E.E.R Cooling

C.O.P Heating

Setting Temperature Range(cool/heat) °C
Dehumidification Rate l/h
Refrigerant Control
Refrigerant Charge g(oz), type

Indoor Unit LCN240CP

Indoor fan motor

Indoor Fan

Indoor Fan RPM
Air Circulation Indoor (H/M/L) CMM(CFM)

Noise Level
(Sound Press,1m)
Temperature Controller

Indoor Coil Fins per inch

Dimensions (W*D*H)
Net Weight Indoor kg(lbs)

Outdoor Unit LCU240CP

Compressor Capacity W(Btu/h)

Outdoor Coil Fins per inch

Outdoor fan motor

Outdoor Fan

Air Circulation Outdoor CMM(CFM)
Noise Level
(Sound Press,1m)

SVC Valve

Dimensions (W*H*D) Outdoor inch(mm)
Net Weight Outdoor kg(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

Output W
Model
No. of Poles
Input W
Running Current A
Capacitor µF/Vac
Type
No. Used / Diameter EA/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
Indoor inch(mm)
Panel inch(mm)

Locked Rotor Amp. A
Type
Quantity No.
Model
Maker

Motor Type
Motor Input W
Oil Type
Oil Charge cc
O.L.P Type(Model Name)
Tube Size (OD) inch(mm)

No. of Rows & Column
Output W
Model
No. of Poles
Input W
Running Current A
Capacitor µF/Vac
Type
No. Used / Diameter EA/inch(mm)
Discharge Side / Top
Speed rpm

Outdoor dB(A)±3

Liquid
Gas

Liquid Side inch(mm)
Gas Side inch(mm)
Length, std m
Max length/elevation m
Indoor Unit mm
Outdoor Unit mm

- 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

-

14 Ceiling Cassette Air Conditioner

Specifications

System

Cooling Capacity

Heating Capacity

Input Cooling/Heating W
Running Current Cooling/Heating A
Power Supply ø,V,Hz
Power Factor %

E.E.R Cooling

C.O.P Heating

Setting Temperature Range(cool/heat) °C
Dehumidification Rate l/h
Refrigerant Control
Refrigerant Charge g(oz), type

Indoor Unit LCN380CP

Indoor fan motor

Indoor Fan

Indoor Fan RPM
Air Circulation Indoor (H/M/L) CMM(CFM)

Noise Level
(Sound Press,1m)
Temperature Controller

Indoor Coil Fins per inch

Dimensions (W*D*H)
Net Weight Indoor kg(lbs)

Indoor Unit
Outdoor Unit
Decoration Panel

Output W
Model
No. of Poles
Input W
Running Current A
Capacitor µF/Vac
Type
No. Used / Diameter EA/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
Indoor inch(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 Unit LCU380CP

Compressor Capacity W(Btu/h)

Outdoor Coil Fins per inch

Outdoor fan motor

Outdoor Fan

Air Circulation Outdoor CMM(CFM)
Noise Level
(Sound Press,1m)

SVC Valve

Dimensions (W*H*D) Outdoor inch(mm)
Net Weight Outdoor kg(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
Quantity No.
Model
Maker

Motor Type
Motor Input W
Oil Type
Oil Charge cc
O.L.P Type(Model Name)
Tube Size (OD) inch(mm)

No. of Rows & Column
Output W
Model
No. of Poles
Input W
Running Current A
Capacitor µF/Vac
Type
No. Used / Diameter EA/inch(mm)
Discharge Side / Top
Speed rpm

Outdoor dB(A)±3

Liquid
Gas

Liquid Side inch(mm)
Gas Side inch(mm)
Length, std m
Max length/elevation m
Indoor Unit mm
Outdoor Unit mm

inch(mm)

No.* mm

2

63

Rotary

GJ176K GJ208K

18100

500 500

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

- Interconnecting Piping Length 7.5m

- Level Difference of Zero.

Service Manual 15

292

292

212

150

54

90

90

192 117

70

110 110

850

850

850

850

744

658

572
744

Unit:mm

744 Unit size

744 Unit size

658 (Hanging bolt)

6666

790 (Ceiling opening)

790 (Ceiling opening)

572(Hanging bolt)

109

109

30

5

6

4

1

2

3

Dimensional Drawings

Dimensional Drawings

1. Indoor Units

Model No.: LCN240CP

Number Name Descripition

1 Liquid pipe connection Ø6.35 flare (1/4")
2 Gas pipe connection Ø12.7 flare (1/2")
3 Drain pipe connection
4 Power supply connection
5 Air discharge grill
6 Air suction grill

16 Ceiling Cassette Air Conditioner

(unit : mm)

288

950

950

290

210.5

180

52

140

40

110

30

90

90

110

30

840

785

840

678

840 Unit size

840 Unit size

672 (Hanging bolt)

101.5101.5

875 (Ceiling opening)

875 (Ceiling opening)

785(Hanging bolt)

45

45

Unit:mm

4

1

2

3

950

950

5

6

Model No.: LCN380CP

Dimensional Drawings

Number Name Descripition

1 Liquid pipe connection Ø6.35 flare (1/4")
2 Gas pipe connection Ø15.88 flare (5/8")
3 Drain pipe connection
4 Power supply connection
5 Air discharge grill
6 Air suction grill

(unit : mm)

Service Manual 17

Gas side
3-way valve

Liquid side
3-way valve

W

D

L1

L2

L3

L6L7 L8 L9

L4

H

L11

L10

L5

Dimensional Drawings

2. Outdoor Units

Model No.: LCU240CP

Model No.

Dim

W mm 870

H mm 800

D mm 320

L1 mm 370

L2 mm 25

L3 mm 340

L4 mm 775

L5 mm 25

L6 mm 546

L7 mm 162

L8 mm 162

L9 mm 54

L10 mm 74.5

L11 mm 79

LCU240CP

18 Ceiling Cassette Air Conditioner

Model No.: LCU380CP

L6L7 L8

L9

L4

H

L11

L10

L5

W

D

L1

L2

L3

Gas side
3-way valve

Liquid side
3-way valve

Dimensional Drawings

Model No.

Dim

LCU380CP

W mm 900

H mm 1,225

D mm 370

L1 mm 460

L2 mm 45

L3 mm 410

L4 mm 1,135

L5 mm 90

L6 mm 550

L7 mm 175

L8 mm 175

L9 mm 112

L10 mm 120

L11 mm 83

Service Manual 19

Wiring Diagrams

Wiring Diagrams

1. Indoor Unit

LCN240CP

20 Ceiling Cassette Air Conditioner

2. Outdoor Unit

LCU240CP

Wiring Diagrams

LCU380CP

Service Manual 21

Refrigerant Cycle Diagrams

INDOOR UNIT

H/EX

H/EX

Liquid SideLIQUID SIDE

COMPRESSOR

ACCUM.

Gas SideGAS SIDE

Capillary Tube

Expansion Device

OUTDOOR UNIT

Refrigerant Cycle Diagrams

1. Cooling Only Models

Model

LC240CP
LC380CP

Pipe Size(Diameter:Ø) inch

Gas Liquid Rated Max. Rated Max.

1/4
1/4

1/2
5/8

Piping length (ft.) Elevation (ft.)

25

100
115

16
16

50
50

Additional

Refrigerant

(oz/ft)

0.32

0.42

22 Ceiling Cassette Air Conditioner

More than
30cm

Fence or

obstacles

More than 70cm

More than 50cm

More than
30cm

More than
30cm

Sunroof

More than 50cm
(Service space)

Unit:cm

Ceiling

Ceiling Board

Ceiling Board

30 or more

Above 250

400 or less

100

or more

50 or
more

50 or
more

30 or less

Floor

Installation

1. Select the best location

Install the air conditioner in the location that satisfies the following conditions.

1.1 Indoor Unit

• There should not be any heat source or steam near the
unit.

• There should not be any obstacle to the air circulation.

• A place where air circulation in the room will be good.

• A place where drainage can be easily obtained.

• A place where noise prevention is taken into
consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the wall,
ceiling, or other obstacles.

• The indoor unit must have sufficeient maintenance
space.

Installation

1.2 Outdoor Unit

• If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from

the condenser is not restricted.

• Ensure that the space around the back is more than 30cm and sides is more than 30cm. The front of the unit

should have more than 70cm of space.

• Do not place animals and plants in the path of the warm air.

• Take the air conditioner weight into account and select a place where noise and vibration are minimum.

• Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.

• Rooftop Installations : If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the

roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop
mounting.

Sunroof

More than
30cm

More than

Fence or

obstacles

More than

30cm

30cm

More than 50cm

More than 70cm

Service Manual 23

Installation

Bolt

Tubing connection

Wall

5~7mm

Indoor Outdoor

Set screw of
paper model (4 pieces)

Paper model
for installation

Ceiling board

150mm

Adjust the same height

Ceiling board

Ceiling

Flat washer for M10

(accessory)

Keep the length of the bolt

from the bracket to 40mm

Open the ceiling board
along the outer edge of the
paper model

Flat washer for M10

(accessory)

Hanging bolt

(W3/8 or M10)

Nut
(W3/8 or M10)

Nut

(W3/8 or M10)

Spring washer

(M10)

Air Conditioner body

2. Settlement of outdoor unit

• Anchor the outdoor unit with a bolt and nut(ø10mm)
tightly and horizontally on a concrete or rigid mount.

• When installing on the wall, roof or rooftop, anchor
the mounting base securely with a nail or wire
assuming the influence of wind and earthquake.

• In the case when the vibration of the unit is conveyed
to the hose, secure the unit with an anti-vibration
rubber.

3. Indoor Unit Installation

24 Ceiling Cassette Air Conditioner

• The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut - W 3/8 or M10
Spring Washer - M10
Plate Washer - M10

CAUTION

• Tighten the nut and bolt to prevent unit falling.

• Drill the piping hole on the wall slightly tilted to
the outdoor side using a Ø 70 hole-core drill.

Installation

The power cord connected to the outdoor unit
should be complied with the following specifications
(Rubber insulation, type H05RN-F approved by HAR
or SAA).

If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer or its service agent.

The connecting cable connected to the indoor and
outdoor unit should be complied with the following
specifications (Rubber insulation, type H05RN-F
approved by HAR or SAA).

CAUTION

20mm

GN/YL

20mm

GN/YL

NORMAL
CROSS-SECTIONAL
AREA 2.1mm

2

(24K/38K)

Capacity 1 Phase

24K BTU/h
38K BTU/h

2.1mm

2

3.3mm

2

1Phase
Cooling Model Only.

POWER
INPUT

Terminals on the indoor unit

1(L) 2(N) 4(N) 5 7683(L)

Terminals on the outdoor unit

4(N) 5 6 73(L)

4. Wiring Connection

1. All wiring must comply with LOCAL REGULATIONS.

2. Select a power source that is capable of supplying the current as required by the air conditioner.

3. Feed the power source to the unit via a distribution switch board designed for this purpose.

4. The terminal screws inside the control box may be loose due to vibration during transport.
Check the screws for loose connection.
(Running the air conditioner with loose connection can overload and damage electrical components.)

5. Always ground the air conditioner with a grounding wire and connector to meet the LOCAL REGULATION.

WARNING

Make sure that the screws of the terminal are free from looseness.

Service Manual 25

Installation

Decoration panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10mm)

Control box cover

Piping side

Inlet GrilleInlet Grille

Inlet Grille

Louver motor

Decoration panel fixing screws
(Hexagon M5 screw)

Air conditioner unit

Decoration panel

Key holes

Display

Lead wire for
louver motor and
display

Air conditioner
unit

Ceiling

board

Decoration panel

Decoration
panel

Fit the insulator (this part) and
be careful for cool air leakage

Good example

Air

Cool air leakage

(no good)

Bad example

Ceiling

board

Air conditioner unit

5. Installation of Decoration Panel

The decoration panel has its installation
direction.

Before installing the decoration panel,
always remove the paper template.

1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10mm in length.)
The fixing screws (hexagon M5 screw) are included the indoor unit box.

2. Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)

3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide the panel so
that the screws reach the key hole edge.

4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)

5. Connect the louver motor connector and display connector.

6. After tightening these screws, install the air inlet grille (including the air filter).

Install certainly the decoration
panel.
Cool air leakage causes sweating.

CAUTION

Water drops fall.

26 Ceiling Cassette Air Conditioner

Installation

Indoor unit

Thermal insulator
(accessory)

Fastening band
(accessory)

Refrigerant piping

Trap is required to prevent water from entering
into electrical parts.

Seal a small opening
around the pipings
with gum type sealer.

Taping

Drain hose

Pipings

Connecting
cable

Plastic Band

Power supply
cord

6. Heat Insulation and pipings

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C).

2. Precautions in high humidity circumstance:
This air conditioner has been tested according to
the "KS Standard Conditions with Mist" and
confirmed that there is not any default. However, if it
is operated for a long time in high humid
atmosphere (dew point temperature: more than
23°C), water drops are liable to fall. In this case,
add heat insulation material according to the
following procedure:

• Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.

• Stick glass wool on all air conditioners that are located in ceiling atmosphere.

• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas piping: thick

piping) and drain piping, add further 10mm to 30mm thickness material.

FORM THE PIPINGS

1. Wrap the connecting portion of indoor unit with
the Insulation material and secure it with two
Plastic Bands. (for the right pipings)

• If you want to connect an additional drain hose,
the end of the drain-outlet should be kept at a
distance from the ground. (Do not dip it into
water, and fix it on the wall to avoid swinging in
the wind.)

2. Tape the Pipings, drain hose and Connecting
Cable from bottom to top.

3. Form the pipings gathered by taping along the
exterior wall and fix it to the wall by saddle or
equivalent.

In case of the Outdoor unit being installed
below position of the Indoor unit.

Service Manual 27

Installation

Maintenance
drain port

Upward
routing
not allowed

Pipe clamp

Indoor unit

700 or less

1 -1.5m

300mm or less

Clamp metal(attached) Drain hose(attached)

Drain raising pipe

Feed water

Drain Pump

Drain pan

Flexible drain hose
(accessory)

Main
drain pipe

Glue the joint

Drain
port

Drain hose connection
Use the clip (accessory)

1/50~1/100

MAX 700mm

Flexible drain hoseFlexible drain hose

In case of the Outdoor Unit being installed
above position of the Indoor Unit.

2. Tape the Pipings and Connecting cable from
bottom to top.

3. Form the pipings gathered by taping along the
exterior wall, and make the trap prevent water
from entering into the room.

4. Fix the pipings onto the wall by saddle or
equivalent.

7. Drain Pipe Work

■ Drain Piping of Ceiling Cassette

• Drain piping must have down-slope (1/50 to 1/100): be sure not to
provide up-and-down slope to prevent reversal flow.

• During drain piping connection, be careful not to exert extra force
on the drain port on the indoor unit.

• The outside diameter of the drain connection on the indoor unit is
32mm.

Seal a small opening
around the pipings
with gum type sealer.

Trap

Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings

•

Be sure to install heat insulation on the drain piping.

Heat insulation material: Polyethylene foam with
thickness more than 8 mm.

■

Install the drain raising pipes at a right angle to the
indoor unit and no more than 300mm from the unit.

Drain test

The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump
operation:

CAUTION

The supplied flexible drain hose should not be curved,
neither screwed. The curved or screwed hose may
cause a leakage of water.

28 Ceiling Cassette Air Conditioner

• Connect the main drain pipe to the exterior and
leave it provisionally until the test comes to an end.

• Feed water to the flexible drain hose and check the
piping for leakage.

• Be sure to check the drain pump for normal
operating and noise when electrical wiring is
complete.

• When the test is complete, connect the flexible
drain hose to the drain port on the indoor unit.

Installation

CAUTION

8. Test running

1) PRECAUTIONS IN TEST RUN

• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.

For test run, carry out the cooling operation first even during winter season.
Carry out the test run more than 5 minutes without stopping.
(Test run will be cancelled 18 minutes later automatically)

• The test run is started by pressing the room temperature checking button and down timer button for 3
seconds at the same time.

• To cancel the test run, press any button.

CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE

• After completing work, be sure to measure and record trial run properties, and store measured data, etc.

• Measuring items are room temperature, outside temperature, suction temperature, blow out temperature,

wind velocity, wind volume, voltage, current, presence of abnormal vibration and noise, operating pressure,
piping temperature, compressive pressure.

• As to the structure and appearance, check following items.

❏ Is the circulation of air adequate?
❏ Is the draining smooth?
❏ Is the heat insulation complete

(refrigerant and drain piping)?

❏ Is there any leakage of refrigerant?

❏ Is the remote controller switch operated?
❏ Is there any faulty wiring?
❏ Are not terminal screws loosened?

M4......118N.cm{12kgf.cm}

M5......196N.cm{20kgf.cm}

M6......245N.cm{25kgf.cm}

M8......588N.cm{60kgf.cm}

Service Manual 29

Installation

Thermometer

2) Connection of power supply

1. Connect the power supply cord to the independent
power supply.

• Circuit breaker is required.

2. Operate the unit for fifteen minutes or more.

3) Evaluation of the performance

1. Measure the temperature of the intake and
discharge air.

2. Ensure the difference between the intake
temperature and the discharge one is more than
8°C.

CAUTION

After the confirmation of the above conditions, prepare the wiring as follows:

1) Never fail to have an individual power specialized for the air conditioner. As for the method of
wiring, be guided by the circuit diagram pasted on the inside of control box cover.

2) Provide a circuit breaker switch between power source and the unit.

3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from
vibrations to which the unit is subjected during the course of transportation. Check them and
make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the
wires.)

4) Specification of power source

5) Confirm that electrical capacity is sufficient.

6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.

7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)

8) Never fail to equip a leakage breaker where it is wet or moist.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the

normal function of a overload protection device.

• Proper starting power is not given to the compressor.

HAND OVER

Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning,
temperature control, etc.).

30 Ceiling Cassette Air Conditioner

9. Optional Operation

TH

R14H

SW TH

REMO
MAIN
2TH

OP7
R18H

R17H

OP6

LO

STAND

SW HIGH

HI

R03S

C070

R04S

R02S

R01S

OP3

OP2 OP1

R19H

R11H

R13H R12H

OP5R16H OP4

R15H

CO1H

REMO

Room Temp. sensor

2TH

Indoor Unit

Position 1
Position 2
Position 3

Slide switch for ceiling height

Slide switch for 2 Thermistor

1) Two Thermistor System

(1) Open the rear cover of the wired remote-controller to set the mode.

(2) Select one of three selectable modes as follows.

• Position 1:
The room themperature is controlled by the thermistor of the wired remote-controller, control the
temperature according to the position of wired remote-controller.

• Position 2:
The room temperature is controlled by the thermistor of the main body.

• Position 3:
The room temperature is controlled by lower temperature between the temperature of main body and of
remote-controller sensor.

(3) Move the slide switch to set position.

Installation

(4) Close the rear cover and check if it works normally.

CAUTION

• Select the position after counselling with a customer.

• In case of cooling mode, room temperature is controlled by the main body sensor.

• To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense

the temperature more accurately.

• Maunfactured in the position 3.

Service Manual 31

Installation

TH

R14H

SW TH

REMO
MAIN
2TH

OP7
R18H

R17H

OP6

LO

STAND

SW HIGH

HI

R03S

C070

R04S

R02S

R01S

OP3

OP2 OP1

R19H

R11H

R13H R12H

OP5R16H OP4

R15H

CO1H

Lo

Hi

STAND

Slide switch for ceiling height

Slide switch for 2 Thermistor

Standard

Low

High

Operation unit

ZONE

1234

Humidify

JET

AUTO

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

Indoor Unit 1

Terminal(Local Supply)
Block

Terminal(Local Supply)
Block

Terminal(Local Supply)
Block

Main PCB

#1

Main PCB

#2

Main PCB

#16

Wired Remote Controller

Indoor Unit 2

Main PCB

Indoor Unit 16

Connector

RED(12V)

YL(SIGNAL)

BR(GND)

RED(12V)

YL(SIGNAL)

BR(GND)

YL(SIGNAL)

BR(GND)

Connecting Cable(Local Supply)

Connector Connector

....

....

YL(SIGNAL)

BR(GND)

YL(SIGNAL)

BR(GND)

YL(SIGNAL)

BR(GND)

Remote

Controller

PCB

Single Control

Group Control 1

Group Control 2

S/W GR

2) Adjusting air volume to the height of ceiling

You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the
comfortable atmosphere to consumers.

Procedure

1. Choose the selectable position in the table after measuring the height of ceiling.

Ceiling height Mode of slide switch Change of air volume Remark

more than 3.3m High Ceiling Increasing

2.7~3.3m Standard -

less than 2.7m Low Ceiling Decreasing

2. In the case of changing the height as "high" or "low", open the rear cover of the wired remote-controller.

3. Move the slide switch to the set position.

4. Close the rear cover and check if it works nomally.

Maunfactured in

standard mode

3) Group Control

It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent
overcurrent.

Wiring design

• Be careful not to exchange the color of wires.

• The maximum length of connecting wire should be below 200m(25Ω) on connecting each units.

• Use a wire more than 0.5mm

32 Ceiling Cassette Air Conditioner

CAUTION

2

• Using the supplied Wired Remote Controller, wire
them like above.

• Move S/W GR to "Group Control 1" position.

• Check the line color of the wire.

Troubleshooting Guide

Troubleshooting Guide

Cycle Troubleshooting Guide

Trouble analysis

1. Check temperature difference between intake and discharge air, and operating current.

Temp. difference : approx. 0°C
Current : less than 80% of

rated current

Temp. Difference

Temp. difference : approx. 8°C
Current : less than 80% of

rated current

Operating Current

Temp. difference : less than 8°C
Current : near the rated

current

Temp. difference : over 8°C

Notice:

Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.

All amount of refrigerant leaked out.
Check refrigeration cycle.

Refrigerant leakage
Clog of refrigeration cycle
Defective compressor

Excessive amount of refrigerant

Normal

2. Check temperature and pressure of refrigeration cycle.

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal value)

High Defective compressor Current is low.

Higher

Normal Excessive amount of High pressure does not quickly

refrigerant rise at the beginning of operation.

Insufficient amount of Current is low.

Lower Higher refrigerant(Leakage)

Clogging

Notice:

1. The suction pressure is usually 4.5~6.0 kg/cm2G at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.

Service Manual 33

Troubleshooting Guide

Electronic Parts Troubleshooting Guide

Trouble 1

Does the Operating LED of indoor unit blink

When Operation's ON?

Is the Connection between CN-POWER of indoor

unit and terminal block?

The Product doesn’t operate at all.

Turn off the main power and wait until LED on outdoor PCB is off

Turn on the main power again.

Refer to the self-diagnosis function.

Check the connecting state of connector

Is the Connection of cable between indoor and

Outdoor unit right?

Is the voltage of CN-POWER in outdoor

PCB ASS'Y about AC220/240V?

Check the Fuse of outdoor PCB Ass'y.

Check the connecting state of wires

Check the Auto Addressing Work

Replace the PCB Ass'y

Check the diagram wiring on the control panel

Check the main power.

Confirm Auto Addresssing work method

* The product's operation starts at three minutes after main power turning on

34 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Trouble 2

(When operated in the Sleeping Mode, the wind speed is set to the low speed as force.)

Caused by the remote controller.

Product doesn't operate with the remote controller.

Turn on main power.

While the compressor has been stopped, the compressor does not operate

owing to the delaying function for 3 minutes after stopped.

When the compressor stopped Indoor Fan is driven by a low speed.

At this point the wind speed is not controlled by the remote controller.

Caused by other parts except

the remote controller

When the mark ( ) is displayed in LCD

screen, replace battery.

When the detect switch (double key) inside the

remote controller door is fault, it is impossible to

operate temperature regulating(▲ / ▼) and wind

speed selecting.

Check the Display PWB Ass'y • Check receiver ass'y

Check the contact of CN-DISP 1 connector

Check DISP PWB Ass'y

-Voltage between CN1 ➀ - ➆ : DC +5V

Service Manual 35

Troubleshooting Guide

Trouble 3

When cooling does not operate

Turn on Main Power

Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 1°C at least.

When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.

Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).

When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.

• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC208V-230V) is applied to the connecting wire
terminal support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay.

Check point COMP ON COMP OFF

Between two pin of DC
part in relay for COMP

Below DC 1V

(app)

About DC12V

36 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Trouble 4

When indoor Fan does not operate

Turn off Main power

Check the connection of CN-FAN or CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Check the related circuit of indoor Fan Motor.

• The pin of Micom, and the part for driving SSR

• Check the pattern

• Check the SSR

- SSR Open: Indoor Fan Motor never operate

- SSR short: Indoor Fan Motor always operates in case of ON or OFF.

Turn ON Main Power

Check the SSR high speed operation by remote control.

(The Indoor Fan Motor is connected)

The voltage of PIN NO 1(blue) and 3(yellow) of CN-FAN or CN-MOTOR.

About AC 160V over About AC 50V over

SSR is not damaged SSR Check

Service Manual 37

Troubleshooting Guide

Trouble 5

When Vertical Louver does not operate

• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.

• If the regular torque is detected when rotating the Vertical Louver with
hands Normal

• Check the connecting condition of CN-U/D Connector

• Check the soldering condition(on PWB) of CN-U/D Connector

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin
GND.

If there are no problems after above checks

• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Vertical Louver

(RED) of CN-U/D and

38 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Self-diagnosis Function

■ Error Indicator

• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.

• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.

• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.

• After error occurrence, if error is released, error LED is also released simultaneously.

• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.

• Having or not of error code is different from Model.

Indoor Error

Error code

Description

MPS

Variable

MPS

Inverter

LED 1

(Red)

LED 2

(Green)

00 No Error ON

01 Indoor Room Thermistor Error 1 time OFF

02 Indoor In-Piping Error 2 times OFF

03 Remote controller Error 3 times OFF

04 Drain Pump Error 4 times OFF

05

Communication Error between In and Out

5 times OFF

06 Indoor Out-Piping Error 6 times OFF

Outdoor Error

Error Code

21 DC Peak(IPM Fault) 2 times 1 time ON
22 CT2(Max CT) 2 times 2 times OFF
23 DC Link Low Volt 2 times 3 times OFF
24 High/Low Pressure/Heatsink Switch 2 times 4 times OFF
25 Low Voltage / Over Voltage 2 times 5 times OFF
26 DC COMP Position Error 2 times 6 times OFF
27 PSC Fault Error 2 times 7 times OFF
28 DC Link High Volt 2 times 8 times OFF
32 D-Pipe High(INV) 3 times 2 times OFF
33 D-Pipe High(Normal) 3 times 3 times OFF
40 CT Sensor(open/short) 4 times OFF
41 INV. D-Pipe Thermistor Error(Open/Short) 4 times 1 times OFF
44 Outdoor Air Thermistor Error(Open/Short) 4 times 4 times OFF
45 Cond Pipe Thermistor Error(Open/Short) 4 times 5 times OFF
46 Suction Pipe Thermistor Error(Open/Short) 4 times 6 times OFF
47 Const. D-Pipe Thermistor Error(Open/Short) 4 times 7 times OFF
51 Capcity Error(High/Low) 5 times 1 times OFF
53 Signal Error(Indoor_Outdoor) 5 times 3 times OFF
54 Phase Error 5 times 4 times OFF
60 EEPROM Check Sum Error 6 times OFF
61 Cond Pipe High 6 times 1 times OFF
62 Heatsink High 6 times 2 times OFF
63 Cond Pipe Low 6 times 3 times OFF
65 Heatsink Thermistor Error(Open/Short)

Description

MPS

Variable

MPS

Inverter

LED 1

(Red)

6 times 5 times OFF

LED 2

(Green)

Indoor
Status

Indoor
Status

Service Manual 39

Troubleshooting Guide

Ω

10kΩ

Check the resistance Check the voltage

V

2.5Vdc

Troubleshooting CH01, CH02, CH06

Display

code

01

02

06

Title Cause of error Check point & Normal condition

Indoor air sensor

Indoor inlet pipe sensor

Indoor outlet pipe sensor

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

Normal resistor : 10KΩ/ at 25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)

Normal resistor : 5KΩ/ at 25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)

Normal resistor : 5KΩ/ at 25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)

Check Point

1. Unplug the sensor on Indoor unit PCB.

2. Estimate the resistance of each sensor.

3. If the resistance of the sensor is 10KΩ/ 5KΩ at 25°C, then sensor is normal.

4. If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. → Change the sensor.

5. Plug the sensor on Indoor unit PCB and Power ON.

6. Estimate the voltage of each sensor.

7. If the voltage of the sensor is 2.5Vdc at 25°C, then sensor is normal.

8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. → Repair or Change the PCB.

40 Ceiling Cassette Air Conditioner

Troubleshooting CH03

Check the Volt.

Indoor Unit

V

12Vdc

12V S GND

Check the Volt.

Wired R/C

V

12Vdc

12V S GND

Troubleshooting Guide

Display

code

03

Title Cause of error Check point & Normal condition

Communication

Wired R/C

• Open / Short

• Wrong connection

• Connection of wire

• Main PCB Volt. DC12V

• Noise interference

Check Point

1. Check the wire connection. (Open / Short) → Repair the connection

2. Check the soldering state of connector. (Soldered poorly) → Repair or Change the PCB.

3. Check the volt. Of main PCB power source. (DC 12V, DC 5V) → Repair or Change the main PCB.

4. Check the installation of wired remote controller. (Noise interference) → Adjust the state of installation

Service Manual 41

Troubleshooting Guide

Check the resistance

Ω

0Ω

CN Float

Troubleshooting CH04

Display

code

04

Title Cause of error Check point & Normal condition

• The connection of wire(Drain pump/ Float switch)

Drain pump

/ Float switch

• Float switch Open.
(Normal : short)

• Drain pump power input. (220V)

• Drain tube installation.

• Indoor unit installation. (Inclination)

Check Point

1. Check the wire connection. (Open, Soldered poorly) → Repair the connection or change the PCB.

2. Check the resistance of float switch (Abnormal : Open, Normal : short) → Check the float switch.

3. Check the level of water

4. Check the volt. Of Drain pump power supply. (AC 230V) → Repair or Change the main PCB.

42 Ceiling Cassette Air Conditioner

Troubleshooting CH05, CH53

Troubleshooting Guide

Display

code

05

/

53

(Indoor → Outdoor)

Title Cause of error Check point & Normal condition

• Power input AC 220V. (Outdoor, Indoor)

• The connector for transmission is disconnected.

Communication

• Communication poorly

• The connecting wires are misconnected.

• The GND1,2 is not connected at main GND.

• The communication line is shorted at GND.

• Transmission circuit of outdoor PCB is abnormal.

• Transmission circuit of indoor PCB is abnormal.

Check Point

1. Check the input power AC230V. (Outdoor, Indoor unit)

2. Check the communication wires are correctly connected.

→ Adjust the connection of wire

→ Confirm the wire of “Live”, “Neutral”

3. Check the resistance between communication line and GND. (Normal : Over 2MΩ)

4. Check the connector for communication is correctly
connected.

5. Check the connection of GND1, GND2, and main GND.

6. If one indoor unit is operated normally, outdoor PCB is no problem.

→ Check the another indoor unit.

* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.

Service Manual 43

Troubleshooting Guide

Troubleshooting CH24, CH25

Display

code

24

25

Title Cause of error Check point & Normal condition

Press S/W Open

Input voltage

• Low / High press
S/W open.

• Abnormal Input voltage
(140Vac , 300Vac .

Check Point

• CH 24

1. Check the connection of “CN_PRESS”

2. Check the install condition for over load.

3. Check the SVC V/V open.

4. Check the leakage of refrigerant.

• Check the connection of “CN_Press”.

• Check the components.

• Check the power source.

• Check the components.

• CH 25

1. Check the power source.

2. Check the components
(Trans1, B/Diode, Diode, Resistance)

44 Ceiling Cassette Air Conditioner

Troubleshooting CH32, CH33

100°C

95°C

95°C

90°C

Inverter Constant

105°C

115°C

COMP OFF

COMP OFF

LEV OPEN

LEV OPEN

NORMAL

NORMAL

LEV OPEN/Hz down

LEV OPEN/Hz down

Troubleshooting Guide

Display

code

32

33

Title Cause of error Check point & Normal condition

D-pipe (Inverter)

temp. high

(105°C )

D-pipe (Constant)

temp. high

(105°C )

• Discharge sensor
(Inverter) temp. high

• Discharge sensor
(Cons.) temp. high

• Check the discharge pipe sensor for INV.

• Check the install condition for over load.

• Check the leakage of refrigerant.

• Check the SVC V/V open.

• Check the discharge pipe sensor for Cons.

• Check the install condition for over load.

• Check the leakage of refrigerant.

• Check the SVC V/V open.

Check Point

• CH 32

1. Check the install condition for over load.

2. Check the SVC V/V open.

3. Check the leakage of refrigerant.

• CH 33

1. Check the install condition for over load.

2. Check the SVC V/V open.

3. Check the leakage of refrigerant.

4. Check the constant compressor. (same with CH21)

Service Manual 45

Troubleshooting Guide

Ω

Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65

Display

code

41

44

45

46

47

65

Title Cause of error Check point & Normal condition

D-pipe sensor (Inverter)

Air sensor

Condenser Pipe sensor

Suction Pipe sensor

D-pipe sensor (Constant)

Heat sink sensor

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Open / Short

• Soldered poorly

• Internal circuit error

• Normal resistor : 200KΩ / at 25°C (Unplugged)

• Normal voltage : 4.5Vdc / at 25°C (plugged)

• Normal resistor : 10KΩ / at 25°C (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C (plugged)

• Normal resistor : 5KΩ / at 25°C (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C (plugged)

• Normal resistor : 5KΩ / at 25°C (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C (plugged)

• Normal resistor : 200KΩ / at 25°C (Unplugged)

• Normal voltage : 4.5Vdc / at 25°C (plugged)

• Normal resistor : 10KΩ / at 25°C (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C (plugged)

Check Point

1. Estimate the resistance of each sensor.(Unplugged)

2. Estimate the voltage of each sensor.(Plugged)

3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal.

If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.

46 Ceiling Cassette Air Conditioner

Troubleshooting CH51, CH60

Troubleshooting Guide

Display

code

51

60

Title Cause of error Check point & Normal condition

Capacity Error

EEPROM

Check sum

Check Point

• CH 51

1. Check the indoor unit capacity.

• Over Capacity
Combination

• Undder Capacity
Combination

• Check sum error

• Check the indoor unit capacity.

• Check the combination table.

• Check the PCB ASM P/No.

• Check the poor soldering.

• CH 60

1. Check the insertion condition of EEPROM.

2. Check the poor soldering

Service Manual 47

Troubleshooting Guide

COMP Frequency

(Hz)

Toff °C

T1 °C

T2 °C

OFFNormal Normal

Normal

Heat Sink temp.

Troubleshooting CH61, CH62

Display

code

61

62

Title Cause of error Check point & Normal condition

Condenser

pipe sensor

temp. high

Heat sink sensor

temp. high

• Condenser pipe sensor

detected high
temp.(65°C)

• Heat sink sensor

detected high
temp.(85°C)

• Check the load condition.

• Check the sensor of Condenser pipe sensor.

• Check the fan is locked.

• Check the sensor of heat sink.

Check Point

• CH 61

1. Check the install condition for over load.
(Refrigerant, Pipe length, Blocked, …)

• CH 62

1. Check the fan is locked.

2. Check the Outdoor temp. is very high.

48 Ceiling Cassette Air Conditioner

(3-way) Valve

Valve cap

Open position
Closed position

Pin

Service
port

Service
port cap

To piping

connection

To outdoor unit

Valve cap

Open position
Closed position

Pin

Service
port

Service
port cap

To outdoor unit

To piping
connection

3-way Valve (Liguid Side) 3-way Valve (Gas Side)

(3-way) Valve

1.

2.

3.

4.

5.

6.

Works Shaft position Shaft position Service port

Shipping Closed Closed Closed

(with valve cap) (with valve cap) (with cap)

Air purging Open Closed Open

(Installation) (counter-clockwise) (clockwise) (push-pin or with

Operation Open Open Closed

(with valve cap) (with valve cap) (with cap)

Pumping down Closed Open Open

(Transfering) (clockwise) (counter-clockwise) (connected

Evacuation Open Open Open
(Servicing) (connected

Gas charging Open Open Open

(Servicing) (with charging

Pressure check Open Open Open

(Servicing) (connected

Gas releasing Open Open Open

(Servicing) (connected

Service port

Closed

(with cap)

Open

(push-pin or with

vacuum pump)

Closed

(with cap)

Closed

(with cap)

Open

(connected

manifold gauge)

Closed

(with cap)

Open

(connected

manifold gauge)

Open

(connected

manifold gauge)

vacuum pump)

manifold gauge)

manifold gauge)

cylinder)

manifold gauge)

manifold gauge)

Service Manual 49

(3-way) Valve

Lo

Closed

Purge the air

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

3-Way
valve

3-Way
valve

CLOSE

(1) Pumping down

•

Procedure

For pumping down,firstly short the Low Pressure
s/w at the outside and then operate below
procedure.(except AUUH488B)

1. Confirm that both the gas side and liquid side
valves are set to the open position.

- Remove the valve stem caps and confirm that
the valve stems are in the raised position.

- Be sure to use a hexagonal wrench to operate
the valve stems.

2. Operate the unit for 10 to 15 minutes.

3. Stop operation and wait for 3 minutes, then
connect the manifold gauge to the service port
of the gas side valve.

- Connect the hose of the gauge with the push
pin to the service port.

4. Air purging of the charge hose.

- Open the Low-handle valve on the gauge
slightly to air purge from the hose.

5. Set the liquid side valve to the closed position.

6. Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 1kg/cm2g.

7. Immediately set the gas side valve to the closed
position.

- Do this quickly so that the gauge ends up
indicating 1kg/ g.

8. Disconnect the charge set, and mount the liquid
side and gas side valve caps and the service
port nut.

- Use torque wrench to tighten the service port

- Be sure to check for gas leakage.

nut to a torque of 1.8kg.m.(4.2kg.m/5.5kg.m)

• Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor.

50 Ceiling Cassette Air Conditioner

(2) Evacuation

Lo

Open

Open

Vacuum pump

2-Way
valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way
valve

CLOSE

OPEN

(All amount of refrigerant leaked)

(3-way) Valve

• Procedure

1. Confirm that both the liguid side valve and gas
side valve are set to the opened position.

2. Connect the vaccum pump to the center hose of
the manifold gauge.

3. Connect the service port of the gas side valve to
the low side of the gauge.

4. Evacuation for approximately one hour.

- Confirm that the gauge needle has moved
toward-76 cmHg (vacuum of 4 mmHg or less).

5. Close the Low handle of the gauge turn off the
vacuum pump, and confirm that the gauge
needle does not move(approximately 5 minutes
after turning off the vacuum pump).

6. Disconnect the charge hose from the vacuum
pump.

- Vacuum pump oil.

If the vacuum pump oil becomes dirty or
depleted,replenish as needed.

7. Mount the valve caps and the service port caps.

Service Manual 51

(3-way) Valve

Lo

Charging
cylinder

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way
valve

3-Way
valve

OPEN

Open

Check valve

(1)

(3) Gas Charging

(After Evacuation)

• Procedure

1. Connect the gauge to the charging cylinder.

- Connect the charge hose which you
disconnected from the vacuum pump to the
valve at the bottom of the cylinder.

- If you are using a gas cylinder, also use a scale
and reverse the cylinder so that the system can
be charged with liquid.

2. Purge the air from the charge hose.

-

Open the valve at the bottom of the cylinder and
press the check valve on the charge set to purge
the air. (Be careful of the liquid refrigerant). The
procedure is the same if using a gas cylinder.

3. Open the low handle on the gauge and charge
the system with liquid refrigerant.

- If the system can not be charged with the
specified amount of refrigerant, it can be
charged with a little at a time (approximately
150g each time) while operating the air
conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1
minute and then repeat the procedure(pumping
down-pin).

4. Immediately disconnect the charge hose from
the gas side valve's service port.

This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.

- Stopping partway will allow the gas to be

discharged.

- If the system has been charged with liquid

refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.

5. Mount the valve stem nuts and the service port
nut.

- Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg.m.)

- Be sure to check for gas leakage.

52 Ceiling Cassette Air Conditioner

Electronic Control Device

• Main P.C.B ASM

Ceiling Cassette Type

Electronic Control Device

Service Manual 53

Exploded View and Replacement Parts List

266090

130411

354211-1

158591

330870

263230

352118-1

266012

552111

55211-2

159830

354211-2

249951

268714
263230

349490

Exploded View and Replacement Parts List

1. Indoor Unit

Model No.: LCN240CP/LCN340CP

54 Ceiling Cassette Air Conditioner

346810

130411

359012

W0CZZ

267110-1

267110-2

130911-1

130911-2

Exploded View and Replacement Parts List

Service Manual 55

Exploded View and Replacement Parts List

Parts List

LOCATION

No.

130411 BASE ASSEMBLY,WELD[INDOOR] 3041A10069A R

130911 CABINET ASSEMBLY,INDOOR 3091A10075E R

130911 CABINET ASSEMBLY,INDOOR 3091A10085C R

158591 PUMP ASSEMBLY,WATER 5859A10006G R

159830 AIR CLEANER ASSEMBLY 5983A10003D R

249951 CONTROL BOX ASSEMBLY,INDOOR 4995A10224E R

263230-1 THERMISTOR ASSEMBLY 6323A30002A R

263230-2 THERMISTOR ASSEMBLY 6323A3226W R

266012 SWITCH ASSEMBLY,FLOAT 6601A20001K R

266090 H.V ASSEMBLY 6609A20009L R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20127E R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20083Q R

268714 PWB(PCB) ASSEMBLY,MAIN 6871A10366M R

330870 DRAIN PAN ASSEMBLY 3087A10035H R

346810 MOTOR ASSEMBLY,INDOOR 4681A20168D R

349490 ORIFICE ASSEMBLY AGD30251001 R

352118 TUBE ASSEMBLY,MENIFOLD(INDOOR) 5211A10600C R

354211 EVAPORATOR ASSEMBLY,BENDING 5421A10062A R

359012 FAN ASSEMBLY,TURBO 5900A10016A R

552111 TUBE ASSEMBLY,CAPILLARY 5211A10550A R

DESCRIPTION

Part No.

REMARKS

LCN240CP

56 Ceiling Cassette Air Conditioner

Parts List

Exploded View and Replacement Parts List

LOCATION

No.

130411 BASE ASSEMBLY,WELD[INDOOR] 3041A10069A R

130911 CABINET ASSEMBLY,INDOOR 3091A10075E R

130911 CABINET ASSEMBLY,INDOOR 3091A10085C R

158591 PUMP ASSEMBLY,WATER 5859A10006G R

159830 AIR CLEANER ASSEMBLY 5983A10003D R

249951 CONTROL BOX ASSEMBLY,INDOOR 4995A10224F R

263230-1 THERMISTOR ASSEMBLY 6323A30002A R

263230-2 THERMISTOR ASSEMBLY 6323A3226W R

266012 SWITCH ASSEMBLY,FLOAT 6601A20001K R

266090 H.V ASSEMBLY 6609A20009L R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20127E R

267110 REMOTE CONTROLLER ASSEMBLY 6711A20083Q R

268714 PWB(PCB) ASSEMBLY,MAIN 6871A10366N R

330870 DRAIN PAN ASSEMBLY 3087A10035H R

346810 MOTOR ASSEMBLY,INDOOR 4681A20168D R

349490 ORIFICE ASSEMBLY AGD30251001 R

352118 TUBE ASSEMBLY,MENIFOLD(INDOOR) 5211A10600A R

354211 EVAPORATOR ASSEMBLY,BENDING 5421A10062A R

359012 FAN ASSEMBLY,TURBO 5900A10016A R

552111 TUBE ASSEMBLY,CAPILLARY 5211A10550A R

DESCRIPTION

Part No.

REMARKS

LCN340CP

Service Manual 57

Exploded View and Replacement Parts List

435301

349480

268712

554031

546810

559010

552112

W0CZZ

552113

268713

552202

566000

649950

554160

561410

552203-1

552203-2

437211

435512

263230

669200

43511

552116

137213-1

435300

137213-2

2. OUTDOOR UNITS

Model No.: LCU240CP

58 Ceiling Cassette Air Conditioner

Parts List

Exploded View and Replacement Parts List

LOCATION

No.

349480 ORIFICE 4948AP2527A R

433501 GRILLE,DISCHARGE 3530A20007J R

437211 PANEL ASSY,FRONT 2A01041X R

546810 MOTOR ASSEMBLY,OUTDOOR 4681A10030C R

552112 TUBE ASSEMBLY,CONDENSER IN 5211A25715A R

552113 TUBE ASSEMBLY,CONDENSER OUT 5211A25716A R

552117 TUBE ASSEMBLY,SUCTION 5211A29913A R

552203-1 VALVE,SERVICE 5220A20007A R

552203-2 VALVE,SERVICE 5220A20006A R

554031 CONDENSER ASSEMBLY,BENT 5403A20022T R

554160 COMPRESSOR ASSEMBLY 2520UGK2AA R

559010 FAN ASSEMBLY,PROPELLER 1A00195B R

435511 COVER CONTROL 3720AR7035C R

649950 CONTROL BOX ASSEMBLY,OUTDOOR 4995A0112M R

268713 PWB(PCB) ASSY,SUB 6871A20318D R

669200 RELAY 6920AP3400A R

W0CZZ CAPACITOR,DRAWING 6120AR2194F R

W0CZZ CAPACITOR,DRAWING 3A00988B R

263230-1 THERMISTOR ASSEMBLY 6323A20028B R

263230-2 THERMISTOR ASSEMBLY 6323A20023E R

435512 COVER ASSEMBLY TOP 3H003266H R

DESCRIPTION

Part No.

REMARKS

LCU240CP

Service Manual 59

Exploded View and Replacement Parts List

546810

649950

268712

552203-1

548490

552203-2

435512

559010

561410

W6640

554031-1

554031-2

566001

W0CZZ-1

W0CZZ-2

552116

554160

268713

437212

648600

669200

263230

437910

435511

137212

352115

352111

552201

Model No.: LCN380CP

60 Ceiling Cassette Air Conditioner

Parts List

Exploded View and Replacement Parts List

LOCATION

No.

137212 PANEL ASSEMBLY,SIDE 3721A20229A R

435512 COVER ASSEMBLY TOP 3550AP1213B R

437211 PANEL ASSY,FRONT 3720AP1212B R

135301 GRILLE,DISCHARGE 3530AP1225D R

135314 GRILLE,REAR 3720AP1202L R

546810 MOTOR ASSEMBLY,OUTDOOR 4681A10030C R

552112 TUBE ASSEMBLY,CONDENSER IN 5211A00034A R

552113 TUBE ASSEMBLY,CONDENSER OUT AJR30109601 R

552203-1 VALVE,SERVICE 5220A20013A R

552203-2 VALVE,SERVICE 5220A20007A R

554031 CONDENSER ASSEMBLY,BENT 5403A20044B R

554160 COMPRESSOR ASSEMBLY TBZ30130501 R

559010 FAN ASSEMBLY,PROPELLER 1A00195B R

649950 CONTROL BOX ASSEMBLY,OUTDOOR ABQ30144401 R

548490 ACCUMLATOR ASSY(MECH) 5211A00033A R

263230-1 THERMIATOR ASSEMBLY 6323A20019C R

263230-1 THERMISTOR ASSEMBLY 6323A20023E R

669200 RELAY 6920AP3400A R

W0CZZ CAPACITOR,DRAWING 6120AR2194F R

268713 PWB(PCB)ASSY, SUB 6871A21318E R

DESCRIPTION

Part No.

REMARKS

LCN380CP

Service Manual 61

Exploded View and Replacement Parts List

152312

135314

146811

137211

268712

135802

Model No.: PT-CDC1

62 Ceiling Cassette Air Conditioner

Parts List

Exploded View and Replacement Parts List

LOCATION

No.

137211 PANEL ASSEMBLY,FRONT(INDOOR) 3721A10106D R

135314 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10066A R

135312 FILTER ASSY,AIR CLEANER 5231A10004A R

146811 MOTOR ASSEMBLY,STEP 4681A20055A R

268712 PWB(PCB) ASSEMBLY,DISPLAY 6871A20096J R

135802 DOOR 3580A20005A R

DESCRIPTION

Part No.

REMARKS

PT-CDC

Service Manual 63

P/No.: 3828A20911A Printed in Korea