LG Ceiling Cassette Air Conditioner

website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
LG
LG
Ceiling Cassette
Air Conditioner
SERVICE MANUAL
MODEL: LCN240CP/LCU240CP
LC240CPI/LC240CPO
LCN340CP/LCU340CP
LC340CPI/LC340CPO
CAUTION
• 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.............................................................................................................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
2 Ceiling Cassette Air Conditioner
Models List
Models List
1. Model line up
1.1 Indoor units
Category
Ceiling
cassette
Model names
Capacity, kW(kBtu/h)
Chassis
Type
4-way
TH
7.03(24)
9.96(34)
AT-C243HLF0
AT-C343HLF0
1.2 Outdoor units
AT-C243HLF0
Cooling only
No. of connectable indoor units
Total capacity index of connectable
indoor units
AT-C343HLF0
1
kW
7.03
9.96
kBtu/h
24
34
Power supply
1Ø, 208-230V, 60Hz
Chassis
❈ Local model name
Local Model 1
Local Model 2
Factory
Indoor
Outdoor
Indoor
Outdoor
AT-C243HLF0
LCN240CP
LCU240CP
LC240CPI
LC240CPO
AT-C343HLF0
LCN340CP
LCU340CP
LC340CPI
LC340CPO
Service Manual 3
Safety Presautions
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.
4 Ceiling Cassette Air Conditioner
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.
Safety Presautions
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.
For installation, always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Be sure the installation area
does not deteriorate with age.
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.
• If the base collapses, the air conditioner could fall with it, causing
property damage, product failure,
and personal injury.
• Moisture may condense and wet or
damage furniture.
Do not place a heater or other
appliances near the power
cable.
Do not let electric parts of the
product get wet.
■ Operational
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical
shock.
• There is risk of fire or electric
shock.
• There is risk of fire, failure of the
product, or electric shock.
Service Manual 5
Safety Presautions
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.
nilosaG
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.
■ 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 Presautions
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.
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.
Do not touch the metal parts of the product
when removing the air filter. They are very
sharp!
• There is risk of personal injury.
x
Wa Thinner
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
Features & Benefits
Environment Friendly Refrigerant :
- LG Ceiling Cassette Air Conditioners uses environment friendly refrigerant, which don't do any harm to
the environment.
Dust
electrode
discharge
Dust particles
Pre-filter
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.
Ionizer
+6.5KV
discharge
Polluted
Air
Dusts Collection
+
+
+
+
+
Generating
plasma
Odour
1
Purified
fresh Air
dusts aluminum coated
Odor molecule
electrode(-)
(3.25KV discharge)
2
........
16
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).
8 Ceiling Cassette Air Conditioner
Main
PCB
Controller
#1
M
1
M
2
M
16
M
17
M
18
M
128
Sub
1
Sub
2
Sub
16
Sub
17
Sub
18
Sub
128
Controller
#2
Controller
#8
Features & Benefits
Swirl Swing
- It is the function for comfort cooling/heating operation.
4- Open(Conventional)
Comparison of Floor
Temp. Distribution(20°C)
Swirl Swing(New)
- The diagonal two louvers are opened the
more larger than the other louvers.
After one minute, it is opposite.
2.4%
100% Improved
4.8%
Comparison of Air Flow Types
4- Open(Conventional)
Swirl Swing(New)
Vane 1 Open
Vane 1 Close
Vane 2 Open
Vane 2 Open
Vane 3 Open
Vane 3 Close
Vane 4 Open
Vane 4 Open
Close
Time
Open
Vane 2
Close
Open
Close
Close
Open
Close
Open
Open
Close
Open
Close
Open
71
Close
Open
Vane 3
Vane 1
Time
Vane 4
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
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
Lower
Standard
Higher
Height
2.4m(7.9ft)
2.7m(8.9ft)
3.0m(9.8ft)
RPM
700/600/500
750/650/550
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.
5~6W
Zero Standby Power:
- Due to SMPS (Switching Modulation Power Supply)
technology, there is almost zero power consumption
in the standby mode.
Child Lock Function:
30m
0.5W
Others
-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
CHILD LOCK
-Display
LG
30m
List of Functions
List of Functions
• Ceiling Cassette
Category
Air flow
Air purifying
Installation
Reliability
Convenience
Individual Control
CAC Network
Function
Special Function Kit
Others
Function
Air supply outlet
Airflow direction control (left & right)
Airflow direction control (up & down)
Auto swing (left & right)
Auto swing (up & down)
Airflow steps(Fan / Cool / Heat)
CHAOS swing
CHAOS wind (Auto wind)
Jet cool (Power wind)
Swirl wind
Deodorizing filter
Plasma air purifier
Prefilter(Washable)
Drain pump
E.S.P. control
Electric heater (Operation)
High ceiling operation
Hot start
Self diagnosis
Soft dry operation
Auto changeover
Auto cleaning
Auto operation(Artificial intelligence)
Auto restart operation
Child lock
Forced operation
Group control
Sleep mode
Timer (On/Off)
Timer (weekly)
Two thermistor control
Standard wired remote controller
Deluxe wired remote controller
Simple wired remote controller
Wired remote controller(for hotel use)
Wireless remote controller(simple)
Wireless LCD remote controller
General central control(Non LGAP)
Dry contact
Simple central control(LGAP)
PDI(Power Distribution Indicator)
PI 485
CTIE
Zone control
Thermistor
AT-C243HLF0
AT-C343HLF0
4
X
Auto
X
O
3/4/X
X
O
O
X
O
O
O
O
X
O
O
X
X
O
O
O
O
Option
O
O
O
O
PQWRHSF0
Option
Option
Option
Option
Option
X
X
-
4
X
Auto
X
O
3/4/X
X
O
O
X
O
O
O
O
X
O
O
X
X
O
O
O
O
Option
O
O
O
O
PQWRHSF0
Option
Option
Option
Option
Option
X
X
-
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.
Service Manual 11
Function of Remote Control
Function of Remote Control
1. Wireless LCD Remote Control
Signal transmitter
5
1
6
3
4
2
7
11
8
13
10
CANCEL
ON
OFF
9
12
17
SET
AUTO CLEAN
°C/°F
18
14
16
15
Flip-up door
(opened)
Operation Mode
Cooling Operation
Auto Operation
Healthy Dehumidification Operation
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.
12 Ceiling Cassette Air Conditioner
Function of Remote Control
2. Wired LCD Remote Control
AUTO SWING
OPERATION
SET TEMP
Room Temp
2ndF
Timer
FAN SPEED
SUB FUNCTION
HI
MED
LO
AUTO Heater Preheat
JET Defrost Humidify
SLo Filter Out door
ZONE
1 2 3 4
Time
1
Operation unit No Func Program set
On Off
Set no. Time 01
03
05
07
09
11
13
15
17
19
21
23
3
17
10
11
12
13
14
15
2
Timer
Cancel
2ndF
Program
Week
Holiday
5
6
4
Plasma
7
8
9
Set/Clr
Hour
Min
RESET
16
18
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.
Service Manual 13
Specifications
Specifications
Indoor unit type
Ceilling Cassette - 4way
Model
Power supply
Phase/Volts/Hz
Cooling capacity
Heating capacity
Current
Nominal running current
Fan
Motor Type
1 / 208-230 / 60
1 / 208-230 / 60
kW
7.03
9.96
24,000
34,000
kW
-
-
Btu/h
-
-
1.0
1.0
BLDC
BLDC
Turbo Fan
Turbo Fan
50.6 * 1
50.6 * 1
cmm
18.4/17.0/15.6
24.1/22.7/21.2
cfm
650/600/550
850/800/750
Fan Type
Motor Output(W) * number of units
Capacitor
AT-C343HLF0
(LCN340CP / LC340CPI)
Btu/h
A
Air flow rate (H/M/L)
AT-C243HLF0
(LCN240CP / LC240CPI)
mF/V
Drive
-
-
DC
DC
Coil
Row * stages * FPI
mm
2R * 9C * 18
2R * 9C * 18
Dimensions
Body
mm(inch)
840 * 840 * 225(331/16 * 331/16 * 87/8)
840 * 840 * 225(331/16 * 331/16 * 87/8)
(W*D*H)
Decorative Panel
mm(inch)
950 * 950 * 30(3713/32 * 3713/32 * 13/16)
950 * 950 * 30(3713/32 * 3713/32 * 13/16)
Net Weight
Body
kg(lbs)
26(57.3)
26(57.3)
Decorative Panel
kg(lbs)
3(6.61)
3(6.61)
Body
kg(lbs)
30(66)
30(66)
Decorative Panel
kg(lbs)
Gross Weight
Air filter
4(9)
4(9)
Long Life filter
Long Life filter
Sound Level (H/M/L)
dB(A)+3
38/35/32
40/37/34
Piping Connections Liquid
mm(inch)
6.35(1/4)
6.35(1/4)
Drain
Gas
mm(inch)
12.7(1/2)
15.88(5/8)
OD/ID
mm(inch)
32/25(1.26/0.98)
32/25(1.26/0.98)
l/h(pts/h)
3.0(6.3)
3.7(7.8)
Dehumidification rate
Safety Devices
Fuse, Thermal protector for Fan motor
Temperature sensor
Refrigerant
Refrigerant control
Connectable outdoor Unit
Power and Transmission interunit cable
No.* mm2 (No. AWG)
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.
14 Ceiling Cassette Air Conditioner
Thermistor
Thermistor
R410A
R410A
EEV
EEV
Single
Single
4 * 2.1(14)
4 * 2.1(14)
Conversion Formula
kW = Btu/h × 0.0002931
CFM = CMM × 35.3
Specifications
Outdoor Unit
Rated Capacity
Cooling
Heating
Rated Input
Cooling
Heating
kW
Btu/h
kW
Btu/h
kW
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)
Indoor unit - Outdoor unit
m(ft)
Max. elevation
AT-C243HLFO
(LCU240CP / LC240CPO)
7.03
24,000
2.5
11.5
24
1 / 208-230 / 60
3 * 2.1(14)
4 * 2.1(14)
870 * 800 * 320(341/2 * 311/2 * 1219/32)
73(160)
78(172)
1
ROTARY
2*GK120KAA
Induction
700
PVE
2100(74.1)
R410A
EEV
2R * 36C * 20
6 / 370
Direct Drive
Side discharge
51(1801)
55
6.35(1/4)
12.7(1/2)
30(100)
15(50)
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.
AT-C343HLFO
(LCU340CP /LC340CPO)
9.96
34,000
3.6
17
38
2 / 208-230 / 60
3 * 3.3(12)
4 * 2.1(14)
900 * 1160 * 370(357/16 * 4511/16 * 149/16)
86(190)
93(205)
1
ROTARY
GJ151KAA + GJ208KAA
Induction
1200
PVE
2500(88.2)
R410A
EEV
2R * 52C * 18
6 / 370
Direct Drive
Side discharge
105(3708)
58
6.35(1/4)
15.88(5/8)
35(115)
20(66)
Conversion Formula
kW = Btu/h × 0.0002931
CFM = CMM × 35.3
Service Manual 15
Dimensional Drawings
Dimensional Drawings
1. Indoor Units
Model No.: LCN240CP/LC240CPI/LCN340CP/LC340CPI
900(35.4) (ceiling opening)
840(33.1)
688(27.1) (hanging bolt)
950(37.4)
950(37.4)
840(33.1)
806(31.7) (hanging bolt)
950(37.4)
900(35.4) (ceiling opening)
225(8.9)
950(37.4)
840(33.1)
688(27.1)
1
950(37.4)
3
840(33.1)
806(31.7)
2
4)
1.
5(
R3
6
840(33.1)
4
225(8.9)
76(3.0)
135(5.3)
30(1.18)
5
7
* mm(inch)
No.
Part Name
1
Decoration panel
2
Air suction grille
3
Air discharge grille
4
Gas pipe connection
5
Liquid pipe connection
6
Drain pipe connection
7
Power supply connection
16 Ceiling Cassette Air Conditioner
Remark
Dimensional Drawings
2. Outdoor Units
Model No.: LCU240CP/LC240CPO
870(34.3)
546(21.5)
54.6(2.1)
360(14.2)
10(0.4)
340(13.4)
320(12.6)
160(6.3)
320(12.6)
Ø5
31(
20.
9)
80(3.1)
50(2.0)
25.5(1.0)
392(15.4)
782.5(30.8)
808(31.8)
333(13.1)
*mm(inch)
Service Manual 17
Dimensional Drawings
Model No.: LCU340CP/LC340CPO
175(6.9)
15(0.6)
370(14.6)
395(15.6)
900(35.4)
550(21.7)
370(14.6)
520(20.5)
4
1135(44.7)
565(22.2)
1165(45.9)
1
3
80(3.1)
124(4.9)
273(10.7)
65(2.6)
2
5
308(12.1)
*mm(inch)
No.
Part Name
1
Air discharge grille
2
Gas pipe connection
3
Liquid pipe connection
4
Power & transmission connection
5
Earth screw
18 Ceiling Cassette Air Conditioner
Remark
Wiring Diagrams
Wiring Diagrams
1. Indoor Unit
LCN240CP/LC240CPI/LCN340CP/LC340CPI
Connector Number
CN-POWER
CN-MOTOR
CN-DPUMP
CN-DISP
CN-FLOAT
CN-REMO
CN-CC
CN-ROOM
CN-PIPE1
CN-PIPE2
CN-GRILL
CN-PTC
CN-HVB
Location
AC power supply
BLDC fan motor output
Drain pump output
Display
Float switch input
Remote control
Dry-contact
Room sensor
In-pipe thermistor
Out-pipe thermistor
Elevation grille
PTC Heater
HVB Ass'y (Air cleaner)
Service Manual 19
Wiring Diagrams
2. Outdoor Unit
LCU240CP/LC240CPO
Notes:
BL
RD
YL
BLUE
RED
YELLOW
BK
OR
GN/YL
BLACK
ORANGE
GREEN/YELLOW
BR
WH
BROWN
WHITE
FIELD WIRING
BK
OR
GN/YL
BLACK
ORANGE
GREEN/YELLOW
BR
WH
BROWN
WHITE
FIELD WIRING
LCU340CP/LC340CPO
Notes:
BL
RD
YL
BLUE
RED
YELLOW
20 Ceiling Cassette Air Conditioner
Refrigerant Cycle Diagrams
Refrigerant Cycle Diagrams
1. Cooling Only Models
INDOOR UNIT
OUTDOOR UNIT
High
pressure
S/W
Thermistor
Thermistor
Gas Side
H/EX
Accumulator
Thermistor
(Air)
Constant
Compressor 2
Capillary Tube
Check
Valve
Constant
Compressor 1
Check
Valve
Heat
Exchanger
GAS SIDE
Thermistor
E.E.V.
LIQUID SIDE
Capacity
24k
34k
Pipe Size(Diameter:Ø) inch
Gas
Liquid
1/4
1/4
1/2
5/8
Piping length (ft.)
Elevation (ft.)
Rated
Max.
Rated
Max.
25
100
115
16
16
50
66
Additional
Refrigerant
(oz/ft)
0.22
0.32
Service Manual 21
Installation
Installation
1. Select the best location
Install the air conditioner in the location that satisfies the following conditions.
Above 250(98.4)
400(157.5) or less
50(19.7)
or more
100(39.4)
or more
Ceiling
Ceiling Board
Ceiling Board
50(19.7)
or more
30(11.8) or less
• 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.
30(11.8)
or more
1.1 Indoor Unit
Unit:cm(inch)
Floor
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.
More than
30cm(11.8inch)
Fe
ob nce
sta or
cle
s
Su
More than
50cm(19.7inch)
nro
of
More than
30cm(11.8inch)
Fe
ob nce
sta or
cle
s
More than 50cm(19.7inch)
More than 70cm(27.6inch)
22 Ceiling Cassette Air Conditioner
Su
nro
of
More than 50cm(19.7inch)
(Service space)
More than
50cm(19.7inch)
More than 50cm(19.7inch)
More than
100cm(39.4inch)
Installation
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.
Tubing connection
Bolt
• In the case when the vibration of the unit is conveyed
to the hose, secure the unit with an anti-vibration rubber.
150mm(5.91inch)
3. Indoor Unit Installation
Ceiling
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Spring washer
(M10)
Keep the length of the bolt
from the bracket to 40mm(1.57inch)
Flat washer for M10
(accessory)
Ceiling board
Flat washer for M10
(accessory)
Nut
(W3/8 or M10)
Air Conditioner body
Ceiling board
Paper model
for installation
Adjust the same height
• The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut
- W 3/8 or M10
Spring Washer - M10
Plate Washer - M10
Set screw of
paper model (4 pieces)
Open the ceiling board
along the outer edge of the
paper model
• Drill the piping hole on the wall slightly tilted to
the outdoor side using a Ø 70(2.76inch) hole-core
drill.
Wall
CAUTION
Indoor
Outdoor
5~7mm
(0.20~0.28inch)
• Tighten the nut and bolt to prevent unit falling.
Service Manual 23
Installation
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.
24k/34k Btu/h (1Ø)
• Cooling & Heating type
Terminals on the indoor unit
Terminals on the outdoor unit
1(L) 2(N)
1(L) 2(N)
3
4
5
1(L) 2(N)
3
4
5
POWER
INPUT
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).
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 CROSS-SECTIONAL AREA
Capacity
24k Btu/h
34k Btu/h
GN
/YL
1 Phase
2.1mm2(AWG 14)
3.3mm2(AWG 12)
NORMAL
CROSS-SECTIONAL
AREA 2.1mm2 (AWG 14)(24k/34k)
GN
20
/YL
20
mm
(0.
mm
8in
(0.
ch
)
8in
ch
)
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
Make sure that the screws of the terminal are free from looseness.
24 Ceiling Cassette Air Conditioner
Installation
5. Installation of Decoration Panel
Before installing the decoration panel,
always remove the paper template.
The decoration panel has its installation
direction.
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).
Piping side
Air conditioner unit
Decoration panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10mm(0.39inch))
Control box cover
Louver
motor
Inlet Grille
Decoration panel
Display
Key holes
Lead wire for
louver motor and
display
Decoration panel fixing screws
(Hexagon M5 screw)
Inlet Grille
CAUTION
Install certainly the decoration
Good example
panel.
Cool air leakage causes sweating.
Water drops fall.
Bad example
Air conditioner
unit
Ceiling
board
Decoration panel
Fit the insulator (this part) and
be careful for cool air leakage
Air conditioner unit
Air
Cool air leakage
(no good)
Ceiling
board
Decoration
panel
Service Manual 25
Installation
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(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:
Fastening band
(accessory)
Refrigerant piping
Indoor unit
Thermal insulator
(accessory)
• 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.
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.)
Seal a small opening
around the pipings
with gum type sealer.
Drain hose
Taping
In case of the Outdoor unit being installed
below position of the Indoor unit.
Pipings
Plastic Band
2. Tape the Pipings, drain hose and Connecting
Cable from bottom to top.
Connecting
cable
Power supply
cord
3. Form the pipings gathered by taping along the
exterior wall and fix it to the wall by saddle or
equivalent.
Trap is required to prevent water from entering
into electrical parts.
26 Ceiling Cassette Air Conditioner
Installation
Seal a small opening
around the pipings
with gum type sealer.
In case of the Outdoor Unit being installed
above position of the Indoor Unit.
Trap
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(1.26inch).
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
• Be sure to install heat insulation on the drain piping.
Upward
routing
not allowed
Pipe clamp
Indoor unit
Maintenance
drain port
700mm
(27.6inch) or less
300mm
1 -1.5m(3.32-4.92ft)
(11.81inch) or less
Heat insulation material: Polyethylene foam with
thickness more than 8 mm(0.31inch).
■ Install the drain raising pipes at a right angle to the
indoor unit and no more than 300mm(11.81inch) 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:
Feed water
Flexible drain hose
(accessory)
Main
drain pipe
Drain Pump
Drain
port
Drain raising pipe
Clamp metal(attached)
Drain hose(attached)
• 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.
Glue the joint
Drain hose connection
Use the clip (accessory)
Flexible drain hose
1/50~1/100
Drain pan
CAUTION
The supplied flexible drain hose should not be curved,
neither screwed. The curved or screwed hose may
cause a leakage of water.
MAX 700mm
(27.6inch)
Flexible drain hose
Flexible drain hose
Service
Manual 27
Installation
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.
CAUTION
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 remote controller switch operated?
❏ Is the draining smooth?
❏ Is there any faulty wiring?
❏ Is the heat insulation complete
❏ Are not terminal screws loosened?
(refrigerant and drain piping)?
❏ Is there any leakage of refrigerant?
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}
28 Ceiling Cassette Air Conditioner
Installation
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).
Thermometer
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.).
Service Manual 29
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.
Slide switch for 2 Thermistor
1
2
3
1
2
3
1
2
3
(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.
30 Ceiling Cassette Air Conditioner
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.
Ceiling height
more than 3.3m(10.8ft)
2.7~3.3m(8.9~10.8ft)
less than 2.7m(8.9ft)
Mode of slide switch
High Ceiling
Standard
Low Ceiling
Change of air volume
Increasing
Decreasing
Remark
Maunfactured in standard mode
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.
1
2
3
1
2
3
1
2
3
Slide switch for
ceiling height
3) Group Control
It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent
overcurrent.
Wiring design
Main PCB
Indoor Unit 1
Indoor Unit 2
Terminal(Local Supply)
Block
Connector
Terminal(Local Supply)
Block
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
RED(12V)
YL(SIGNAL)
BR(GND)
Main PCB
#1
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Indoor Unit 16
Terminal(Local Supply)
Block
Connector
Main PCB
#2
....
AUTO SWING
OPERATION
SET TEMP
Room Temp
Operation unit
03
FAN SPEED
HI
MED
LO
Time
Timer
On Off
Set no. Time 01
ZONE
....
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Main PCB
#16
Connecting Cable(Local Supply)
SUB FUNCTION
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
1 2 3 4
Program set
05
07
09
11
13
15
17
19
21
23
Wired Remote Controller
Single Control
S/W GR
Group Control 1
Group Control 2
Remote
Controller
PCB
• 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
• 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 0.5mm2
Service Manual 31
Troubleshooting Guide
Troubleshooting Guide
Cycle Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air, and operating current.
Temp. difference
Current
: approx. 0°C(0°F)
: less than 80% of
rated current
All amount of refrigerant leaked out.
Check refrigeration cycle.
Temp. difference
Current
: approx. 8°C(14.4°F)
: less than 80% of
rated current
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Temp. difference
Current
: less than 8°C(14.4°F)
: near the rated current
Temp. difference
: over 8°C(14.4°F)
Temp. Difference
Operating Current
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.
Suction pressure
(Compared with
the normal value)
Temperature
(Compared with
the normal value)
Cause of Trouble
Description
High
Defective compressor
Current is low.
Normal
Excessive amount of
refrigerant
High pressure does not quickly
rise at the beginning of operation.
Insufficient amount of
refrigerant(Leakage)
Clogging
Current is low.
Higher
Lower
Higher
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm G at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
2
32 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Electronic Parts Troubleshooting Guide
Trouble 1
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
Check the Auto Addressing Work
Confirm Auto Addresssing work method
Replace the PCB Ass'y
* The product's operation starts at three minutes after main power turning on
Service Manual 33
Troubleshooting Guide
Trouble 2
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.
(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
34 Ceiling Cassette Air Conditioner
• Check receiver ass'y
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(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
Between two pin of DC
part in relay for COMP
COMP ON
COMP OFF
Below DC 1V
(app)
About DC12V
Service Manual 35
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
36 Ceiling Cassette Air Conditioner
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
Normal
hands
• 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.
(RED) of CN-U/D and
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
Service Manual 37
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)
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
21
22
23
24
25
26
27
28
32
33
40
41
44
45
46
47
51
53
54
60
61
62
63
65
DC Peak(IPM Fault)
CT2(Max CT)
DC Link Low Volt
High/Low Pressure/Heatsink Switch
Low Voltage / Over Voltage
DC COMP Position Error
PSC Fault Error
DC Link High Volt
D-Pipe High(INV)
D-Pipe High(Normal)
CT Sensor(open/short)
INV. D-Pipe Thermistor Error(Open/Short)
Outdoor Air Thermistor Error(Open/Short)
Cond Pipe Thermistor Error(Open/Short)
Suction Pipe Thermistor Error(Open/Short)
Const. D-Pipe Thermistor Error(Open/Short)
Capcity Error(High/Low)
Signal Error(Indoor_Outdoor)
Phase Error
EEPROM Check Sum Error
Cond Pipe High
Heatsink High
Cond Pipe Low
Heatsink Thermistor Error(Open/Short)
38 Ceiling Cassette Air Conditioner
MPS
Variable
MPS
Inverter
LED 1
(Red)
2 times
2 times
2 times
2 times
2 times
2 times
2 times
2 times
3 times
3 times
4 times
4 times
4 times
4 times
4 times
4 times
5 times
5 times
5 times
6 times
6 times
6 times
6 times
6 times
LED 2
(Green)
1 time
2 times
3 times
4 times
5 times
6 times
7 times
8 times
2 times
3 times
1 times
4 times
5 times
6 times
7 times
1 times
3 times
4 times
1 times
2 times
3 times
5 times
Indoor
Status
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Troubleshooting Guide
Troubleshooting CH01, CH02, CH06
Display
code
Title
01
Indoor air sensor
• 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)
02
Indoor inlet pipe sensor
• Open / Short
• Soldered poorly
• Internal circuit error
Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
06
Indoor outlet pipe sensor
• Open / Short
• Soldered poorly
• Internal circuit error
Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
Cause of error
Check point & Normal condition
10kΩ
2.5Vdc
Ω
V
Check the resistance
Check the voltage
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.
Service Manual 39
Troubleshooting Guide
Troubleshooting CH03
Display
code
Title
03
Communication
Wired R/C
Cause of error
Check point & Normal condition
• Connection of wire
• Main PCB Volt. DC12V
• Noise interference
• Open / Short
• Wrong connection
Wired R/C
12V
S
Indoor Unit
GND
12V
S
GND
12Vdc
12Vdc
V
V
Check the Volt.
Check the Volt.
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
40 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Troubleshooting CH04
Display
code
Title
04
Drain pump
/ Float switch
Cause of error
• Float switch Open.
(Normal : short)
Check point & Normal condition
• The connection of wire(Drain pump/ Float switch)
• Drain pump power input. (220V)
• Drain tube installation.
• Indoor unit installation. (Inclination)
CN Float
0Ω
Ω
Check the resistance
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.
Service Manual 41
Troubleshooting Guide
Troubleshooting CH05, CH53
Display
code
05
/
53
Title
Communication
(Indoor → Outdoor)
Cause of error
• Communication poorly
Check point & Normal condition
• 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.
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.
42 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Troubleshooting CH24, CH25
Display
code
Title
24
Press S/W Open
25
Input voltage
Cause of error
Check point & Normal condition
• Low / High press
S/W open.
• Check the connection of “CN_Press”.
• Check the components.
• Abnormal Input voltage
(140Vac , 300Vac .
• Check the power source.
• Check the components.
Check Point
• CH 24
• CH 25
1. Check the connection of “CN_PRESS”
1. Check the power source.
2. Check the install condition for over load.
2. Check the components
(Trans1, B/Diode, Diode, Resistance)
3. Check the SVC V/V open.
4. Check the leakage of refrigerant.
Service Manual 43
Troubleshooting Guide
Troubleshooting CH32, CH33
Display
code
Title
32
D-pipe (Inverter)
temp. high
(105°C(221°F) )
• Discharge sensor
(Inverter) 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.
33
D-pipe (Constant)
temp. high
(105°C(221°F) )
• Discharge sensor
(Cons.) temp. high
• 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.
105°C
(221°F)
95°C
(203°F)
90°C
(194°F)
Cause of error
COMP OFF
LEV OPEN/Hz down
LEV OPEN/Hz down
NORMAL
Check point & Normal condition
105°C
(221°F)
90°C
(194°F)
80°C
(176°F)
Inverter
COMP OFF
LEV OPEN
LEV OPEN
NORMAL
Constant
Check Point
• CH 32
• CH 33
1. Check the install condition for over load.
1. Check the install condition for over load.
2. Check the SVC V/V open.
2. Check the SVC V/V open.
3. Check the leakage of refrigerant.
3. Check the leakage of refrigerant.
4. Check the constant compressor. (same with CH21)
44 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65
Display
code
Title
41
D-pipe sensor (Inverter)
• 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)
44
Air sensor
• 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)
45
Condenser Pipe sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
46
Suction Pipe sensor
• Open / Short
• Soldered poorly
• Internal circuit error
• Normal resistor : 5KΩ / at 25°C(77°F) (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
47
D-pipe sensor (Constant)
• 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)
65
Heat sink sensor
• 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)
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.
Ω
If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.
Service Manual 45
Troubleshooting Guide
Troubleshooting CH51, CH60
Display
code
51
Title
Capacity Error
60
EEPROM
Check sum
Cause of error
• Over Capacity
Combination
• Undder Capacity
Combination
Check point & Normal condition
• Check the indoor unit capacity.
• Check the combination table.
• Check the PCB ASM P/No.
• Check the poor soldering.
• Check sum error
Check Point
• CH 51
• CH 60
1. Check the indoor unit capacity.
1. Check the insertion condition of EEPROM.
2. Check the poor soldering
46 Ceiling Cassette Air Conditioner
Troubleshooting Guide
Troubleshooting CH61, CH62
Display
code
Title
Cause of error
61
Condenser
pipe sensor
temp. high
• Condenser pipe sensor
detected high
temp.(65°C)(149°F)
• Check the load condition.
• Check the sensor of Condenser pipe sensor.
62
Heat sink sensor
temp. high
• Heat sink sensor
detected high
temp.(85°C)(185°F)
• Check the fan is locked.
• Check the sensor of heat sink.
Check point & Normal condition
Heat Sink temp.
Toff °C
T2 °C
T1 °C
COMP Frequency
Normal
(Hz)
Normal
OFF
Normal
Check Point
• CH 61
• CH 62
1. Check the install condition for over load.
(Refrigerant, Pipe length, Blocked, …)
1. Check the fan is locked.
2. Check the Outdoor temp. is very high.
Service Manual 47
(3-way) Valve
(3-way) Valve
3-way Valve (Liguid Side)
3-way Valve (Gas Side)
Valve cap
Valve cap
Open position
Closed position
Open position
Closed position
Pin
Pin
To piping
connection
Service Service
port cap port
To outdoor unit
1.
To piping
connection
Service Service
port cap port
To outdoor unit
Works
Shaft position
Service port
Shaft position
Service port
Shipping
Closed
(with valve cap)
Closed
(with cap)
Closed
(with valve cap)
Closed
(with cap)
Closed
(clockwise)
Open
(push-pin or with
vacuum pump)
Closed
(with cap)
Air purging
(Installation)
Open
Open
(counter-clockwise) (push-pin or with
vacuum pump)
Operation
Open
(with valve cap)
Closed
(with cap)
Open
(with valve cap)
Pumping down
(Transfering)
Closed
(clockwise)
Closed
(with cap)
Open
(counter-clockwise)
Open
(connected
manifold gauge)
Evacuation
(Servicing)
Open
Open
(connected
manifold gauge)
Open
3.
Open
(connected
manifold gauge)
Open
Closed
(with cap)
Open
4.
Gas charging
(Servicing)
Pressure check
(Servicing)
Open
Open
(connected
manifold gauge)
Open
5.
Open
(connected
manifold gauge)
Gas releasing
(Servicing)
Open
Open
(connected
manifold gauge)
Open
6.
Open
(connected
manifold gauge)
2.
48 Ceiling Cassette Air Conditioner
Open
(with charging
cylinder)
(3-way) Valve
(1) Pumping down
Liquid side
Indoor unit
3-Way
valve
Open
Outdoor unit
Gas side
Closed
3-Way
valve
Lo
CLOSE
CLOSE
Purge the air
• 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.
6. Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 1kg/cm g.
2
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
nut to a torque of 1.8kg.m.(4.2kg.m/5.5kg.m)
- Be sure to check for gas leakage.
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.
• Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor.
Service Manual 49
(3-way) Valve
(2) Evacuation
(All amount of refrigerant leaked)
Liquid side
Indoor unit
Outdoor unit
2-Way
valve
Open
Gas side
3-Way
valve
Open
Vacuum pump
Lo
OPEN
CLOSE
• 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).
50 Ceiling Cassette Air Conditioner
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.
(3-way) Valve
(3) Gas Charging
(After Evacuation)
Liquid side
Indoor unit
2-Way
valve
Open
Outdoor unit
Gas side
Open
3-Way
valve
Check valve
Charging
cylinder
Lo
(1)
OPEN
CLOSE
• 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.
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.
Service Manual 51
Electronic Control Device
Electronic Control Device
• Main P.C.B ASM
<Indoor>
52 Ceiling Cassette Air Conditioner
<Outdoor>
Exploded View and Replacement Parts List
Exploded View and Replacement Parts List
1. Indoor Unit
Model No.: LCN240CP/LCN340CP
130412
267110-1
267110-2
349600
346810
359012
349480
130911-3
268714
249951
135500
130911-4
337000
130911-2
152510
130911-1
354211
W49810
330870
352118
158591
552111
159830
266090
Eva-in
263230-1
Eva-out
263230-2
The model name of Front Panel for this model is "PT-CDC1"
(Refer to 59 page)
Service Manual 53
Exploded View and Replacement Parts List
Parts List
Part No.
LOCATION
No.
130411
REMARKS
DESCRIPTION
LCN240CP / LC240CPI
BASE ASSEMBLY,WELD(INDOOR)
LCN340CP / LC340CPI
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
6609A20009L
R
267110-1 REMOTE CONTROLLER ASSEMBLY
6711A20127E
R
267110-2 REMOTE CONTROLLER ASSEMBLY
6711A20083Q
R
266090
HVPS,DC/DC
268714
PCB ASSEMBLY,MAIN
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)
354211
EVAPORATOR ASSEMBLY,FINAL
5421A10062A
R
359012
FAN,TURBO
5900A10016A
R
552111
TUBE ASSEMBLY,CAPILLARY
5211A10550B
R
W49800
SUPPORTER ASSEMBLY
4981A21011A
R
54 Ceiling Cassette Air Conditioner
6871A10366M
5211A10600C
6871A10366N
5211A10600A
R
R
435301
349480
435512
437210
W4810
430410
447910
559010
552113
546810
349600
137213-1
552114
550140
268711
552117
561410
567480-1
W0CZZ-2
552112
554160
W0CZZ-1
567480-2
554031
W49810
649950
435300
552203-2
552203-1
435511
137213-2
Exploded View and Replacement Parts List
2. OUTDOOR UNITS
Model No.: LCU240CP
Service Manual 55
Exploded View and Replacement Parts List
Parts List
Part No.
LOCATION
No.
REMARKS
DESCRIPTION
LCU240CP / LC240CPO
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
4948AP2527A
R
1A00206B
R
3041AP2741G
R
1A00208H
R
349480
ORIFICE
349600
BRACKET,MOTOR
430410
BASE ASSEMBLY,OUTDOOR
435300
GRILLE,REAR
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
5403A20022T
R
2520UGKK2AA(GK120KAA,2EA)
R
1A00195B
R
554031
CONDENSER ASSEMBLY,BENDING
554160
COMPRESSOR SET,KOREA
559010
FAN ASSEMBLY,PROPELLER
561410
SOLENOID
6141A20018Z
R
649950
CASE ASSEMBLY,CONTROL(OUTDOOR)
4995A10112M
R
W6920
RELAY,CONTACT
6920AP3400A
R
W0CZZ-1 CAPACITOR,UNCLASSIFIED
3A00988B(35uF)
R
6120AR2194F(6+35uF)
R
3A01934B
R
6871A21318D
R
W0CZZ-2 CAPACITOR,FILM,BOX
W4810
BRACKET
268711
PCB ASSEMBLY, MAIN
56 Ceiling Cassette Air Conditioner
437211
435301
559010
435512
559010
435511
546810
546810
549610
137213
430411
447910
567480-1
567480-2
554031
554031
55211G
552113
268711
649950
W6920
W0CZZ-2
554160-1
554160-2
552115
W0CZZ-1
552114
561410
552117
W49810
552203-2
437212
552203-1
Exploded View and Replacement Parts List
Model No.: LCU340CP/LC340CP0
Service Manual 57
Exploded View and Replacement Parts List
Parts List
Part No.
LOCATION
No.
REMARKS
DESCRIPTION
LCU340CP / LC340CPO
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
3041A20047Z
R
3A01293X
R
430411
BASE ASSEMBLY,WELD(OUTDOOR)
435511
COVER ASSEMBLY,CONTROL(OUTDOOR)
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
5403A20044B
R
554160-1 COMPRESSOR SET,KOREA
TBZ30130501(GJ208KAA)
R
554160-2 COMPRESSOR SET,KOREA
2520UTBK1AA(GJ151KAA)
R
1A00195B
R
554031
CONDENSER ASSEMBLY,BENDING
559010
FAN ASSEMBLY,PROPELLER
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
58 Ceiling Cassette Air Conditioner
Exploded View and Replacement Parts List
Model No.: PT-CDC1
146811
268711
159830
135316
135800
137211
Service Manual 59
Exploded View and Replacement Parts List
Parts List
Part No.
LOCATION
No.
REMARKS
DESCRIPTION
PT-CDC1
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
60 Ceiling Cassette Air Conditioner
P/No.: 3828A20911A
Printed in Korea