LG LC340CPO, LC340CPI, LC240CPO, LCN340CP, LCU340CP Service Manual

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.

MODEL: LCN240CP/LCU240CP

LC240CPI/LC240CPO
LCN340CP/LCU340CP
LC340CPI/LC340CPO

2 Ceiling Cassette Air Conditioner

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.............................................................................................................19

9. Refrigerant Cycle Diagrams ...........................................................................................21

10. Installation ....................................................................................................................22

11. Trouble Shooting Guide................................................................................................32

12. (3-Way)Valve ................................................................................................................48

13. Electronic Control Device.............................................................................................52

14. Exploded View and Replacement Parts List ................................................................53

Models List

Service Manual 3

Models List

❈ Local model name

1.2 Outdoor units

1. Model line up

1.1 Indoor units

Category Type

Chassis

Model names

Capacity, kW(kBtu/h)

7.03(24) 9.96(34)

Ceiling

cassette

4-way

Cooling only

Total capacity index of connectable
indoor units

Chassis

TH

AT-C243HLF0 AT-C343HLF0

AT-C243HLF0 AT-C343HLF0

1No. of connectable indoor units

9.967.03kW

3424kBtu/h

1Ø, 208-230V, 60HzPower supply

Factory

AT-C243HLF0

AT-C343HLF0

Local Model 1

Indoor Outdoor Indoor Outdoor

LCN240CP

LCN340CP

LCU240CP

LCU340CP

LC240CPI

LC340CPI

Local Model 2

LC240CPO

LC340CPO

4 Ceiling Cassette Air Conditioner

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.

■ Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

■ Installation

Be sure not to do.

Be sure to follow the instruction.

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 ground the product.

• 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.

Always install a dedicated cir­cuit and breaker.

• Improper wiring or installation may
cause fire or electric shock

Use the correctly rated break­er or fuse.

• There is risk of fire or electric
shock.

Do not modify or extend the
power cable.

• There is risk of fire or electric
shock.

Safety Presautions

Service Manual 5

■ Operational

Do not install, remove, or re­install the unit by yourself
(customer).

• There is risk of fire, electric shock,
explosion, or injury.

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.

For installation, always con­tact the dealer or an
Authorized Service Center.

• 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 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.

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.

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.

Safety Presautions

6 Ceiling Cassette Air Conditioner

■ Installation

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.

Be cautious that water could not enter the
product.

• There is risk of fire, electric shock, or product damage.

Always check for gas (refrigerant) leakage after
installation or repair of product.

• Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is
drained away properly.

• A bad connection may cause water leakage.

Do not store or use flammable gas or com­bustibles near the product.

• There is risk of fire or failure of product.

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.

Safety Presautions

Gasolin

Service Manual 7

Keep level even when installing the product.

• To avoid vibration or water leakage.

Use two or more people to lift and transport
the product.

• Avoid personal injury.

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.

Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!

• There is risk of personal injury.

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.

■ Operational

Safety Presautions

90˚

Thinner

Wax

8 Ceiling Cassette Air Conditioner

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(64°F). The unit will contin­ue to run in jet cool mode till the Indoor temperature
reaches 18°C(64°F).

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

Swirl Swing

- 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.

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, 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

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

10 Ceiling Cassette Air Conditioner

Features & Benefits

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:

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.

5~6W

Others LG

0.5W

CHILD LOCK

-Display

Selection Height RPM

Lower 2.4m(7.9ft) 700/600/500

Standard 2.7m(8.9ft) 750/650/550

Higher 3.0m(9.8ft) 800/700/600

Service Manual 11

List of Functions

• Ceiling Cassette

List of Functions

Air supply outlet
Airflow direction control (left & right)
Airflow direction control (up & down)
Auto swing (left & right)

Air flow

Auto swing (up & down)
Airflow steps(Fan / Cool / Heat)
CHAOS swing
CHAOS wind (Auto wind)
Jet cool (Power wind)
Swirl wind
Deodorizing filter

Air purifying Plasma air purifier

Prefilter(Washable)
Drain pump

Installation

E.S.P. control
Electric heater (Operation)
High ceiling operation
Hot start

Reliability Self diagnosis

Soft dry operation
Auto changeover
Auto cleaning
Auto operation(Artificial intelligence)
Auto restart operation

Convenience

Child lock
Forced operation
Group control
Sleep mode
Timer (On/Off)
Timer (weekly)
Two thermistor control
Standard wired remote controller
Deluxe wired remote controller

Individual Control

Simple wired remote controller
Wired remote controller(for hotel use)
Wireless remote controller(simple)
Wireless LCD remote controller
General central control(Non LGAP)

CAC Network

Dry contact

Function

Simple central control(LGAP)
PDI(Power Distribution Indicator)
PI 485

Special Function Kit

CTIE
Zone control

Others Thermistor

44

XX

Auto Auto

XX
OO

3/4/- 3/4/-

XX
XX
OO
OO
XX
OO
OO
OO

--

-­OO
XX
OO
OO
XX
XX
OO
OO
OO
OO

Option Option

-­OO
OO
OO
OO

--

--

--

--

PQWRHSF0 PQWRHSF0

Option Option
Option Option
Option Option
Option Option
Option Option

XX
XX

--

FunctionCategory

AT-C243HLF0 AT-C343HLF0

Note :

O : Applied, X : Not applied, – : No relation
Option: Model name & price are different according to options, and assembled in factory with main unit.
Accessory: Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

12 Ceiling Cassette Air Conditioner

Function of Remote Control

1. Wireless LCD Remote Control

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

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.

❈ The wireless remote controller do not operate the swirl mode.❈ The wireless remote controller do not operate the swirl mode.

Service Manual 13

Function of Remote Control

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

6

1

5

4

8
9

7

17

1234

ZONE

2ndF

No Func

AUTO
JET
SLo

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

Used to set the current time and clear the setting
time.

2. Wired LCD Remote Control

14 Ceiling Cassette Air Conditioner

Specifications

Specifications

Note :

1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 26.7°C(80°F) DB /19.4°C(67°F) WB

- Outdoor Temperature 35°C(95°F) DB /23.9°C(75°F) WB

Piping Length - Interconnecting Piping Length 7.5m(25ft)

- Level Difference of Zero.

Conversion Formula
kW = Btu/h × 0.0002931

CFM = CMM × 35.3

Power supply

Phase/Volts/Hz

Cooling capacity kW

Btu/h

Heating capacity kW

Btu/h

Current Nominal running current A

Fan Motor Type

Fan Type

Motor Output(W) * number of units

Air flow rate (H/M/L) cmm

cfm

Capacitor mF/V

Drive

Coil Row * stages * FPI mm

Dimensions Body mm(inch)

(W*D*H) Decorative Panel mm(inch)

Net Weight Body kg(lbs)

Decorative Panel kg(lbs)

Gross Weight Body kg(lbs)

Decorative Panel kg(lbs)

Air filter

Sound Level (H/M/L) dB(A)+3

Piping Connections Liquid mm(inch)

Gas mm(inch)

Drain OD/ID mm(inch)

Dehumidification rate l/h(pts/h)

Safety Devices

Temperature sensor

Refrigerant

Refrigerant control

Connectable outdoor Unit

Power and Transmission interunit cable

No.* mm2 (No. AWG)

Model

AT-C243HLF0

(LCN240CP / LC240CPI)

AT-C343HLF0

(LCN340CP / LC340CPI)

Indoor unit type Ceilling Cassette - 4way

1 / 208-230 / 60 1 / 208-230 / 60

7.03 9.96

24,000 34,000

--

--

1.0 1.0

BLDC BLDC

Turbo Fan Turbo Fan

50.6 * 1 50.6 * 1

18.4/17.0/15.6 24.1/22.7/21.2

650/600/550 850/800/750

--

DC DC

2R * 9C * 18 2R * 9C * 18

840 * 840 * 225(331/

16 * 33

1

/

16 * 8

7

/

8) 840 * 840 * 225(33

1

/

16 * 33

1

/

16 * 8

7

/

8)

950 * 950 * 30(37

13

/32 * 3713/32 * 13/16) 950 * 950 * 30(3713/32 * 3713/32 * 13/16)

26(57.3) 26(57.3)

3(6.61) 3(6.61)

30(66) 30(66)

4(9) 4(9)

Long Life filter Long Life filter

38/35/32 40/37/34

6.35(1/4) 6.35(1/4)

12.7(1/2) 15.88(5/8)

32/25(1.26/0.98) 32/25(1.26/0.98)

3.0(6.3) 3.7(7.8)

Fuse, Thermal protector for Fan motor

Thermistor Thermistor

R410A R410A

EEV EEV

Single Single

4 * 2.1(14) 4 * 2.1(14)

Service Manual 15

Specifications

Rated Capacity Cooling kW

Btu/h

Heating kW

Btu/h

Rated Input Cooling kW

Heating kW
Energy Label
Testing combination
Running current Cooling A

Heating A
Starting current (Cooling/Heating) A
Power supply Phase / Volts / Hz
Power supply Cable(outdoor)

No. * mm2(No. AWG)

Power and transmission cable

No. * mm2(No. AWG)
Dimensions W * H * D mm(inch)
Net weight kg(lbs)
Gross weight kg(lbs)
Maximum number of connectable unit
Compressor Type
(constant) Qty * model

Motor Type
Oil charge volume cc
Oil type

Refrigerant

Charge(at 7.5m(25ft))

g(oz)
Type
Control

Heat Exchanger Rows * Column * FPI

Defrosting method

Fan Capacitor mF/Vac

Drive
Discharge Direction

Side / Top

Air flow rate cmm(cfm)

Noise level(H) Sound press, 1m db (A) + 3
Piping connections Liquid mm(inch)

Gas mm(inch)

Max. piping length Main piping m(ft)
Max. elevation

Indoor unit - Outdoor unit

m(ft)

7.03 9.96

24,000 34,000

--

--

2.5 3.6

--

--

--

11.5 17

--

24 38

1 / 208-230 / 60 2 / 208-230 / 60

3 * 2.1(14) 3 * 3.3(12)
4 * 2.1(14) 4 * 2.1(14)

870 * 800 * 320(341/

2 * 31

1

/

2 * 12

19

/

32) 900 * 1160 * 370(35

7

/

16 * 45

11

/

16 * 14

9

/

16)

73(160) 86(190)
78(172) 93(205)

11

ROTARY ROTARY

2*GK120KAA GJ151KAA + GJ208KAA

Induction Induction

700 1200

PVE PVE

2100(74.1) 2500(88.2)

R410A R410A

EEV EEV

2R * 36C * 20 2R * 52C * 18

- -

6 / 370 6 / 370

Direct Drive Direct Drive

Side discharge Side discharge

51(1801) 105(3708)

55 58

6.35(1/4) 6.35(1/4)

12.7(1/2) 15.88(5/8)
30(100) 35(115)

15(50) 20(66)

AT-C243HLFO

(LCU240CP / LC240CPO)

AT-C343HLFO

(LCU340CP /LC340CPO)

Outdoor Unit

Note :

1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 26.7°C(80°F) DB /19.4°C(66.9°F) WB

- Outdoor Temperature 35°C(95°F) DB /23.9°C(75°F) WB

Piping Length - Interconnecting Piping Length 7.5m(25ft)

- Level Difference of Zero.

Conversion Formula
kW = Btu/h × 0.0002931
CFM = CMM × 35.3

16 Ceiling Cassette Air Conditioner

225(8.9)

950(37.4)

950(37.4)

840(33.1)

7

76(3.0)

135(5.3)

4

5

225(8.9)

6

806(31.7)

840(33.1)

840(33.1)

688(27.1)

950(37.4)

30(1.18)

950(37.4)

R35(1.4)

3

2

1

900(35.4) (ceiling opening)

688(27.1) (hanging bolt)

840(33.1)

900(35.4) (ceiling opening)

950(37.4)

806(31.7) (hanging bolt)

840(33.1)

Drain pipe connection

Air suction grille

Part Name

Decoration panel

Air discharge grille

Liquid pipe connection

Gas pipe connection

6

5

No.

2

4

3

1

Remark

7

Power supply connection

* mm(inch)

Dimensional Drawings

1. Indoor Units

Model No.: LCN240CP/LC240CPI/LCN340CP/LC340CPI

Dimensional Drawings

Service Manual 17

870(34.3)

546(21.5)

54.6(2.1)

333(13.1)

Ø531(20.9)

10(0.4)

808(31.8)

782.5(30.8)

392(15.4)

25.5(1.0)

80(3.1)

50(2.0)

320(12.6)

320(12.6)

340(13.4)

360(14.2)

160(6.3)

*mm(inch)

Dimensional Drawings

Model No.: LCU240CP/LC240CPO

2. Outdoor Units

18 Ceiling Cassette Air Conditioner

Dimensional Drawings

Model No.: LCU340CP/LC340CPO

Gas pipe connection

Part Name

Air discharge grille

Liquid pipe connection

Earth screw

Power & transmission connection

5

No.

2

4

3

1

Remark

5

1135(44.7)

1165(45.9)

308(12.1)

565(22.2)

273(10.7)

520(20.5)

80(3.1)

124(4.9)

900(35.4)

550(21.7)

370(14.6)

395(15.6)

15(0.6)

175(6.9)

3

2

65(2.6)

4

370(14.6)

1

*mm(inch)

Service Manual 19

Wiring Diagrams

1. Indoor Unit

LCN240CP/LC240CPI/LCN340CP/LC340CPI

Wiring Diagrams

Connector Number Location

CN-POWER AC power supply
CN-MOTOR BLDC fan motor output

CN-DPUMP Drain pump output

CN-DISP Display

CN-FLOAT Float switch input

CN-REMO Remote control

CN-CC Dry-contact

CN-ROOM Room sensor

CN-PIPE1 In-pipe thermistor
CN-PIPE2 Out-pipe thermistor
CN-GRILL Elevation grille

CN-PTC PTC Heater
CN-HVB HVB Ass'y (Air cleaner)

20 Ceiling Cassette Air Conditioner

Wiring Diagrams

LCU240CP/LC240CPO

LCU340CP/LC340CPO

2. Outdoor Unit

Notes:

BL

BLUE

RD

RED

YL

YELLOW

BK

OR

GN/YL

BLACK
ORANGE
GREEN/YELLOW

BR

WH

BROWN
WHITE
FIELD WIRING

Notes:

BL

BLUE

RD

RED

YL

YELLOW

GN/YL

BK

BLACK

OR

ORANGE
GREEN/YELLOW

BR

WH

BROWN
WHITE
FIELD WIRING

Service Manual 21

Refrigerant Cycle Diagrams

1. Cooling Only Models

INDOOR UNIT

H/EX

LIQUID SIDE

Gas Side

GAS SIDE

Capillary Tube

OUTDOOR UNIT

Thermistor
(Air)

E.E.V.

Accumulator

Heat

Exchanger

Check

Valve

Constant

Compressor 1

Constant

Compressor 2

Check

Valve

Thermistor

Thermistor

High
pressure
S/W

Thermistor

24k
34k

Gas Liquid Rated Max. Rated Max.

Pipe Size(Diameter:Ø) inch

Piping length (ft.) Elevation (ft.)

Capacity

Additional

Refrigerant

(oz/ft)

1/4
1/4

1/2
5/8

25

100
115

50
66

16
16

Refrigerant Cycle Diagrams

0.22

0.32

22 Ceiling Cassette Air Conditioner

Installation

More than
30cm(11.8inch)

Fence or

obstacles

Sunroof

More than 50cm(19.7inch)

(Service space)

More than
30cm(11.8inch)

More than 50cm(19.7inch)

More than 70cm(27.6inch)

More than 50cm(19.7inch)

More than
100cm(39.4inch)

More than
50cm(19.7inch)

More than
50cm(19.7inch)

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(11.8inch) and sides is more than 30cm(11.8inch).

The front of the unit should have more than 70cm(27.6inch) 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.

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 considera-

tion.

• 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.

Unit:cm(inch)

Ceiling

Ceiling Board

Ceiling Board

30(11.8)

or more

Above 250(98.4)

400(157.5) or less

100(39.4)

or more

50(19.7)
or more

50(19.7)
or more

30(11.8) or less

Floor

Installation

Sunroof

Fence or

obstacles

Service Manual 23

Installation

Bolt

Tubing connection

2. Settlement of outdoor unit

• Anchor the outdoor unit with a bolt and

nut(ø10mm(0.39inch)) 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.

Wall

5~7mm

(0.20~0.28inch)

Indoor Outdoor

3. Indoor Unit Installation

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

• Drill the piping hole on the wall slightly tilted to
the outdoor side using a Ø 70(2.76inch) hole-core
drill.

Set screw of
paper model (4 pieces)

Paper model
for installation

Ceiling board

150mm(5.91inch)

Adjust the same height

Ceiling board

Ceiling

Flat washer for M10

(accessory)

Keep the length of the bolt

from the bracket to 40mm(1.57inch)

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

• Tighten the nut and bolt to prevent unit falling.

CAUTION

24 Ceiling Cassette Air Conditioner

Installation

4. Wiring Connection

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

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.

24k/34k Btu/h (1Ø)

• Cooling & Heating type

Terminals on the indoor unit

1(L)

2(N) 3 4 5

Terminals on the outdoor unit

POWER
INPUT

1(L) 2(N) 2(N) 31(L)

4 5

CAUTION

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).

NORMAL CROSS-SECTIONAL AREA

GN/YL

Capacity
24k Btu/h
34k Btu/h

20mm(0.8inch)

2.1mm

3.3mm

1 Phase

2

(AWG 14)

2

(AWG 12)

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

WARNING

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).

NORMAL

GN/YL

CROSS-SECTIONAL
AREA 2.1mm

20mm(0.8inch)

2

(AWG 14)(24k/34k)

Service Manual 25

Installation

5. Installation of Decoration Panel

1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10mm(0.39inch) 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).

Decoration panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10mm(0.39inch))

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

The decoration panel has its installation
direction.

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

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

Water drops fall.

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

CAUTION

26 Ceiling Cassette Air Conditioner

Installation

6. Heat Insulation and pipings

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over
120°C(248°F) ).

2. Precautions in high humidity circumstance:
This air conditioner has been tested according to
the "KS Standard Conditions with Mist" and con
here is not any default. However, if it is operated for
a long time in high humid atmosphere (dew point
temperature: more than 23°C(73.4°F)), 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(0.39 to 0.79inch).

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

• In addition to the normal heat insulation (thickness: more than 8mm(0.31inch)) for refrigerant piping (gas

piping: thick piping) and drain piping, add further 10mm to 30mm(0.39inch to 1.18 inch) thickness material.

Indoor unit

Thermal insulator
(accessory)

Fastening band
(accessory)

Refrigerant piping

HEAT INSULATION

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.

FORM THE PIPINGS

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

Service Manual 27

Installation

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(1.26inch).

•

Be sure to install heat insulation on the drain piping.

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

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

• 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.

Heat insulation material: Polyethylene foam with
thickness more than 8 mm(0.31inch).

Drain test

Maintenance
drain port

Upward
routing
not allowed

Pipe clamp

Indoor unit

700mm

(27.6inch) or less

1 -1.5m(3.32-4.92ft)

300mm

(11.81inch) 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)

CAUTION

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

1/50~1/100

MAX 700mm
(27.6inch)

Flexible drain hoseFlexible drain hose

■

Install the drain raising pipes at a right angle to the
indoor unit and no more than 300mm(11.81inch) from
the 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.

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

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

Trap

28 Ceiling Cassette Air Conditioner

Installation

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.

• 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.

CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE

❏ 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}{10.4lbf.in}

M5......196N.cm{20kgf.cm}{17.4lbf.in}

M6......245N.cm{25kgf.cm}{21.7lbf.in}

M8......588N.cm{60kgf.cm}{52.1lbf.in}

8. Test running

CAUTION

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(14.4°F).

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

HAND OVER

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 nor-

mal function of a overload protection device.

• Proper starting power is not given to the compressor.

30 Ceiling Cassette Air Conditioner

Installation

9. Optional Operation

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.

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

Slide switch for 2 Thermistor

1
2
3

1
2
3

1
2
3

• 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.

CAUTION

Service Manual 31

Installation

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.

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.

Slide switch for
ceiling height

1
2
3

1
2
3

1
2
3

Ceiling height Mode of slide switch Change of air volume Remark

more than 3.3m(10.8ft) High Ceiling Increasing

2.7~3.3m(8.9~10.8ft) Standard ­less than 2.7m(8.9ft) Low Ceiling Decreasing

Maunfactured in stan-

dard mode

3) Group Control

• Be careful not to exchange the color of wires.

• The maximum length of connecting wire should be below 200m(656ft)(25Ω) on connecting each units.

• Use a wire more than 0.5mm

2

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

Wiring design

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

• 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.

CAUTION

32 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Trouble analysis

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

All amount of refrigerant leaked out.
Check refrigeration cycle.

Refrigerant leakage
Clog of refrigeration cycle
Defective compressor

Excessive amount of refrigerant

Normal

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.

2. Check temperature and pressure of refrigeration cycle.

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.

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

rated current

Temp. difference :

approx. 8°C(14.4°F)

Current : less than 80% of

rated current

Temp. difference :

less than 8°C(14.4°F)

Current : near the rated cur-

rent

Temp. difference : over 8°C(14.4°F)

Temp. Difference

Operating Current

Suction pressure Temperature

(Compared with (Compared with Cause of Trouble Description

the normal value) the normal value)

High Defective compressor Current is low.

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

Higher

Cycle Troubleshooting Guide

Troubleshooting Guide

Service Manual 33

Troubleshooting Guide

Electronic Parts Troubleshooting Guide

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.

Does the Operating LED of indoor unit blink

When Operation's ON?

Refer to the self-diagnosis function.

Is the Connection between CN-POWER of indoor

unit and terminal block?

Check the connecting state of connector

Is the Connection of cable between indoor and

Outdoor unit right?

Check the diagram wiring on the control panel

Is the voltage of CN-POWER in outdoor

PCB ASS'Y about AC220/240V?

Check the main power.

Check the Fuse of outdoor PCB Ass'y.

Check the connecting state of wires

Confirm Auto Addresssing work method

Check the Auto Addressing Work

Replace the PCB Ass'y

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

Trouble 1

34 Ceiling Cassette Air Conditioner

Troubleshooting Guide

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.

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

Caused by the remote controller.

Caused by other parts except

the remote controller

When the mark ( ) is displayed in LCD

screen, replace battery.

Check the contact of CN-DISP 1 connector

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 DISP PWB Ass'y

-Voltage between CN1 ➀ - ➆ : DC +5V

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

Product doesn't operate with the remote controller.

Trouble 2

Service Manual 35

Troubleshooting Guide

When cooling does not operate

Trouble 3

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(77°F)).

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

Below DC 1V

About DC12V

(app)

Between two pin of DC
part in relay for COMP

36 Ceiling Cassette Air Conditioner

Troubleshooting Guide

When indoor Fan does not operate

Trouble 4

Check the SSR high speed operation by remote control.

(The Indoor Fan Motor is connected)

Turn off Main power

Check the connection of CN-FAN or CN-MOTOR

Check the Fan Motor

Check the Fuse(AC250V/T2A)

Turn ON Main Power

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.

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

• 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

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

Check the operating circuit of the Vertical Louver

• Confirm that there is DC +12V between pin (RED) of CN-U/D and
GND.

When Vertical Louver does not operate

Trouble 5

38 Ceiling Cassette Air Conditioner

Troubleshooting Guide

■ 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.

Self-diagnosis Function

Indoor Error

Error code

Description

MPS

Variable

MPS

Inverter

LED 1

(Red)

LED 2

(Green)

Indoor
Status

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

Description

MPS

Variable

MPS

Inverter

LED 1

(Red)

LED 2

(Green)

Indoor
Status

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)

6 times 5 times OFF

Service Manual 39

Troubleshooting Guide

Ω

10kΩ

Check the resistance Check the voltage

V

2.5Vdc

01

02

06

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(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Display

code

Title Cause of error Check point & Normal condition

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(77°F), 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(77°F), then sensor is normal.

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

Troubleshooting CH01, CH02, CH06

40 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Troubleshooting CH03

Check the Volt.

Indoor Unit

V

12Vdc

12V S GND

Check the Volt.

Wired R/C

V

12Vdc

12V S GND

03

Communication

Wired R/C

• Open / Short

• Wrong connection

• Connection of wire

• Main PCB Volt. DC12V

• Noise interference

Display

code

Title Cause of error Check point & Normal condition

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

Troubleshooting CH04

Check the resistance

Ω

0Ω

CN Float

04

Drain pump

/ Float switch

• Float switch Open.
(Normal : short)

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

• Drain pump power input. (220V)

• Drain tube installation.

• Indoor unit installation. (Inclination)

Display

code

Title Cause of error Check point & Normal condition

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 Guide

Troubleshooting CH05, CH53

05

/

53

Communication

(Indoor → Outdoor)

• Communication poorly

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

• The connector for transmission is disconnected.

• 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.

Display

code

Title Cause of error Check point & Normal condition

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

24

25

Press S/W Open

Input voltage

• Low / High press
S/W open.

• Abnormal Input voltage
(140Vac , 300Vac .

• Check the connection of “CN_Press”.

• Check the components.

• Check the power source.

• Check the components.

Display

code

Title Cause of error Check point & Normal condition

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.

• CH 25

1. Check the power source.

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

44 Ceiling Cassette Air Conditioner

Troubleshooting Guide

Troubleshooting CH32, CH33

32

33

D-pipe (Inverter)

temp. high

(105°C(221°F) )

D-pipe (Constant)

temp. high

(105°C(221°F) )

• 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.

Display

code

Title Cause of error Check point & Normal condition

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)

90°C

(194°F)

80°C

(176°F)

95°C

(203°F)

Inverter Constant

105°C

(221°F)

105°C

(221°F)

COMP OFF

COMP OFF

LEV OPEN

LEV OPEN

NORMAL

NORMAL

LEV OPEN/Hz down

LEV OPEN/Hz down

90°C

(194°F)

Service Manual 45

Troubleshooting Guide

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

Ω

41

44

45

46

47

65

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(77°F) (Unplugged)

• Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)

• Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

• Normal resistor : 200KΩ / at 25°C(77°F) (Unplugged)

• Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)

• Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)

• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)

Display

code

Title Cause of error Check point & Normal condition

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 Guide

Troubleshooting CH51, CH60

51

60

Capacity Error

EEPROM

Check sum

• 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.

Display

code

Title Cause of error Check point & Normal condition

Check Point

• CH 51

1. Check the indoor unit capacity.

• CH 60

1. Check the insertion condition of EEPROM.

2. Check the poor soldering

Service Manual 47

Troubleshooting Guide

Troubleshooting CH61, CH62

61

62

Condenser

pipe sensor

temp. high

Heat sink sensor

temp. high

• Condenser pipe sensor

detected high
temp.(65°C)(149°F)

• Heat sink sensor

detected high
temp.(85°C)(185°F)

• Check the load condition.

• Check the sensor of Condenser pipe sensor.

• Check the fan is locked.

• Check the sensor of heat sink.

Display

code

Title Cause of error Check point & Normal condition

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.

COMP Frequency

(Hz)

Toff °C

T1 °C

T2 °C

OFFNormal Normal

Normal

Heat Sink temp.

48 Ceiling Cassette Air Conditioner

(3-way) Valve

(3-way) Valve

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

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

vacuum pump)

Operation Open Open Closed

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

Pumping down Closed Open Open

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

manifold gauge)

Evacuation Open Open Open

(Servicing) (connected

manifold gauge)

Gas charging Open Open Open

(Servicing) (with charging

cylinder)

Pressure check Open Open Open

(Servicing) (connected

manifold gauge)

Gas releasing Open Open Open

(Servicing) (connected

manifold gauge)

3.

2.

1.

4.

5.

6.

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

Service port

Closed

(with cap)

Open

(push-pin or with

vacuum pump)

Closed

(with cap)

Closed

(with cap)

Closed

(with cap)

Open

(connected

manifold gauge)

Open

(connected

manifold gauge)

Open

(connected

manifold gauge)

Service Manual 49

(3-way) Valve

•

Procedure

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

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 indi-

cating 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

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

- Be sure to check for gas leakage.

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

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

50 Ceiling Cassette Air Conditioner

(3-way) Valve

(2) Evacuation

(All amount of refrigerant leaked)

• 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.

Lo

Open

Open

Vacuum pump

2-Way
valve

Outdoor unit

Liquid side

Indoor unit

Gas side

3-Way
valve

CLOSE

OPEN

Service Manual 51

(3-way) Valve

(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(5.3oz)
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.

- Stopping partway will allow the gas to be dis-

charged.

- 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.

Lo

Charging
cylinder

Outdoor unit

Indoor unit

Liquid side

Gas side

CLOSE

Open

2-Way
valve

3-Way
valve

OPEN

Open

Check valve

(1)

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.

52 Ceiling Cassette Air Conditioner

Electronic Control Device

Electronic Control Device

• Main P.C.B ASM

<Indoor> <Outdoor>

130412

346810

359012

130911-3

130911-4

130911-2

130911-1

152510

330870

159830

354211

W49810

352118

158591

552111

263230-1

249951

135500

337000

349480

263230-2

267110-2267110-1

268714

266090

349600

Eva-in

Eva-out

The model name of Front Panel for this model is "PT-CDC1"
(Refer to 59 page)

Exploded View and Replacement Parts List

1. Indoor Unit

Model No.: LCN240CP/LCN340CP

Exploded View and Replacement Parts List

Service Manual 53

Exploded View and Replacement Parts List

Parts List

LOCATION

No.

130411 BASE ASSEMBLY,WELD(INDOOR) 3041A10069A R

130911-1 CABINET ASSEMBLY,INDOOR 3091A10075E R

130911-2 CABINET ASSEMBLY,INDOOR 3091A10085C R

130911-3 CABINET ASSEMBLY,INDOOR 3091A10077A R

130911-4 CABINET ASSEMBLY,INDOOR 3091A10075F R

135500-1 COVER 3550A30273A R

152510 HOSE ASSEMBLY,DRAIN 5251A10003A R

158591 PUMP ASSEMBLY,WATER 5859A10006G R

159830 FILTER ASSEMBLY,AIR CLEANER 5983A10003D R

249951 CASE ASSEMBLY,CONTROL(INDOOR) 4995A10224E 4995A10224F R

263230-1 THERMISTOR,NTC 6323A30002A R

263230-2 THERMISTOR,NTC 6323AQ3226W R

266090 HVPS,DC/DC 6609A20009L R

267110-1 REMOTE CONTROLLER ASSEMBLY 6711A20127E R

267110-2 REMOTE CONTROLLER ASSEMBLY 6711A20083Q R

268714 PCB ASSEMBLY,MAIN 6871A10366M 6871A10366N R

330870 PAN ASSEMBLY,DRAIN 3087A10035H R

337000 MESH,METAL 3700A20036A R

346810 MOTOR ASSEMBLY,DC,INDOOR 4681A20168D R

349480 ORIFICE 4948A20039A R

349600 BRACKET,MOTOR 4960A20080A R

352118 TUBE ASSEMBLY,MENIFOLD(INDOOR) 5211A10600C 5211A10600A R

354211 EVAPORATOR ASSEMBLY,FINAL 5421A10062A R

359012 FAN,TURBO 5900A10016A R

552111 TUBE ASSEMBLY,CAPILLARY 5211A10550B R

W49800 SUPPORTER ASSEMBLY 4981A21011A R

DESCRIPTION

LCN240CP / LC240CPI LCN340CP / LC340CPI

Part No.

REMARKS

54 Ceiling Cassette Air Conditioner

2. OUTDOOR UNITS

Model No.: LCU240CP

435300

137213-2

Exploded View and Replacement Parts List

435511

552203-1

552203-2

649950

W49810

137213-1

554031

546810

349600

W0CZZ-2

567480-2

W0CZZ-1

268711

561410

552117

567480-1

552112

559010

552114

550140

554160

552113

430410

447910

435512

W4810

437210

349480

435301

Service Manual 55

Exploded View and Replacement Parts List

Parts List

LOCATION

No.

137213-1 PANEL ASSEMBLY,SIDE 1A00202F R

137213-2 PANEL ASSEMBLY,SIDE 3A02284N R

567480-1 THERMISTOR,NTC 6323A20028B R

567480-2 THERMISTOR,NTC 6323A20023E R

349480 ORIFICE 4948AP2527A R

349600 BRACKET,MOTOR 1A00206B R

430410 BASE ASSEMBLY,OUTDOOR 3041AP2741G R

435300 GRILLE,REAR 1A00208H R

435301 GRILLE,DISCHARGE 3530A20007J R

435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3550AR2886C R

435512 COVER ASSEMBLY,TOP(OUTDOOR) 3H03266H R

437210 PANEL ASSEMBLY,FRONT(SUB) 1A00197C R

447910 BARRIER ASSEMBLY,OUTDOOR 4791A30004H R

546810 MOTOR ASSEMBLY 4681A10030C R

W49810 SUPPORTER ASSEMBLY 4980A20001B R

550140 DAMPER,COMPRESSOR 4H00982E R

552112 TUBE ASSEMBLY,CONDENSER(IN) 5211A25715A R

552113 TUBE ASSEMBLY,CONDENSER(OUT) 5211A25716A R

552114 TUBE ASSEMBLY, DISCHARGE(OUTDOOR) 5211A29916A R

552117 TUBE ASSEMBLY,SUCTION(OUTDOOR) 5211A29913A R

552203-1 VALVE,SERVICE 5220A20007A R

552203-2 VALVE,SERVICE 5220A20006A R

554031 CONDENSER ASSEMBLY,BENDING 5403A20022T R

554160 COMPRESSOR SET,KOREA 2520UGKK2AA(GK120KAA,2EA) R

559010 FAN ASSEMBLY,PROPELLER 1A00195B R

561410 SOLENOID 6141A20018Z R

649950 CASE ASSEMBLY,CONTROL(OUTDOOR) 4995A10112M R

W6920 RELAY,CONTACT 6920AP3400A R

W0CZZ-1 CAPACITOR,UNCLASSIFIED 3A00988B(35uF) R

W0CZZ-2 CAPACITOR,FILM,BOX 6120AR2194F(6+35uF) R

W4810 BRACKET 3A01934B R

268711 PCB ASSEMBLY, MAIN 6871A21318D R

DESCRIPTION

LCU240CP / LC240CPO

Part No.

REMARKS

56 Ceiling Cassette Air Conditioner

Model No.: LCU340CP/LC340CP0

546810

649950

552203-2

552203-1

435512

559010

554031

554031

W0CZZ-1

W0CZZ-2

268711

437212

W6920

567480-2

567480-1

546810

549610

559010

437211

435301

435511

137213

447910

430411

W49810

561410

552114

554160-2

552117

552115

55211G

552113

554160-1

Exploded View and Replacement Parts List

Service Manual 57

Exploded View and Replacement Parts List

Parts List

LOCATION

No.

435301 GRILLE,DISCHARGE 3530AP1225D R

437212 PANEL ASSEMBLY,REAR(OUTDOOR) 3720AP1202L R

137213 PANEL ASSEMBLY,SIDE 3721A20229A R

567480-1 THERMISTOR,NTC 6323A20019C R

567480-2 THERMISTOR,NTC 6323A20023E R

430411 BASE ASSEMBLY,WELD(OUTDOOR) 3041A20047Z R

435511 COVER ASSEMBLY,CONTROL(OUTDOOR) 3A01293X R

435512 COVER ASSEMBLY,TOP(OUTDOOR) 3550AP1213B R

437211 PANEL ASSEMBLY,FRONT(OUTDOOR) 3720AP1212B R

447910 BARRIER ASSEMBLY,OUTDOOR 4760AP1216C R

546810 MOTOR ASSEMBLY,OUTDOOR 4681A10030C R

552117 TUBE ASSEMBLY,SUCTION(OUTDOOR) 5211A00033A R

549610 BRACKET ASSEMBLY,MOTOR(OUTDOOR) 4960A10004A R

552115 TUBE ASSEMBLY,MENIFOLD(OUTDOOR) 5211A00034A R

552113 TUBE ASSEMBLY,CONDENSER(OUT) AJR30109601 R

552114 TUBE ASSEMBLY,DISCHARGE(OUTDOOR) 5211A19011A R

55211G TUBE ASSEMBLY,EXPANSION AJR30127901 R

552203-1 VALVE,SERVICE 5220A20013A R

552203-2 VALVE,SERVICE 5220A20007A R

554031 CONDENSER ASSEMBLY,BENDING 5403A20044B R

554160-1 COMPRESSOR SET,KOREA TBZ30130501(GJ208KAA) R

554160-2 COMPRESSOR SET,KOREA 2520UTBK1AA(GJ151KAA) R

559010 FAN ASSEMBLY,PROPELLER 1A00195B R

561410 SOLENOID 6141A20018Z R

649950 CASE ASSEMBLY,CONTROL(OUTDOOR) ABQ30144401 R

W6920 RELAY,CONTACT 6920AP3400A R

W0CZZ-1 CAPACITOR,FILM,BOX 6120AR2194F(6+35uF) R

W0CZZ-2 CAPACITOR,FILM,BOX 6120AR2194K(6+45uF) R

W49810 SUPPORTER 4980AP2517D R

268711 PCB ASSEMBLY,MAIN 6871A21318E R

DESCRIPTION

LCU340CP / LC340CPO

Part No.

REMARKS

58 Ceiling Cassette Air Conditioner

159830

135316

146811

137211

268711

135800

Model No.: PT-CDC1

Exploded View and Replacement Parts List

Service Manual 59

Exploded View and Replacement Parts List

Parts List

LOCATION

No.

137211 PANEL ASSEMBLY,FRONT(INDOOR) 3721A10106M R

135316 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A10066A R

159830 FILTER ASSY,AIR CLEANER 5231A10004A R

146811 MOTOR ASSEMBLY,STEP 4681A20055A R

268711 PWB(PCB) ASSEMBLY,DISPLAY 6871A20096J R

135800 DOOR 3580A20005A R

DESCRIPTION

Part No.

REMARKS

PT-CDC1

60 Ceiling Cassette Air Conditioner

P/No.: 3828A20911A Printed in Korea