Panasonic CS-KE18NKU, CS-KE24NKU Service Manual

TECHNICAL & SERVICE MANUAL

CS-KE18NKU + CU-KE18NKU CS-KE24NKU + CU-KE24NKU

DC INVERTER SPLIT SYSTEM AIR CONDITIONER

Indoor Model No.

CS-KE18NKU

CS-KE24NKU

Indoor Unit Outdoor Unit

CS-KE18NKU CS-KE24NKU

Product Code No.

1 852 360 92

1 852 360 93

Outdoor Model No.

CU-KE18NKU

CU-KE24NKU

Product Code No.

1 852 361 20

1 852 361 23

CU-KE18NKU

IMPORTANT

These air conditioners employ new refrigerant R410A.

Pay special attention when servicing the unit.

CU-KE24NKU

REFERENCE NO.

SM700871

SAFETY PRECAUTIONS

• Before doing repair work, please read the " SAFETY PRECAUTIONS" carefully and fully understand them.

• The precautionary items here are divided into " Warning" and " Caution" items. Items in particular which may cause death or serious injury to the service personnel if the work is not performed correctly, are included in the " Warning" table. However, even precautionary items identified as " Caution" also have the potential for serious consequences if not performed correctly. Important safety precautions are described for all items in both categories. Be sure to carefully follow all of them.

• Symbol Indication

: This symbol indicates items to which we need to pay attention.

In this triangle, a definite precautionary item is described.

: This symbol indicates the item to be prohibited.

In or close to this circle, a prohibited item is described.

: This symbol indicates the items requiring special attention or instruction.

In or close to this circle, a prohibited item is described.

• After doing repair work, perform a test run to confirm that there are no abnormalities. At the same time, explain the precautions in use to the user.

Warning

Before performing an overhaul, disconnect the power plug or power cable from the unit. Performing the work with the power supplied to the unit, may cause an electric shock.

When repair work or circuit inspection that requires power supply for the air conditioner, is to be performed, do not touch the charging section. Doing so may cause an electric shock.

Prohibit

For the step-up capacitor attached to the electric section, perform the repair work after sufficiently discharging it. Insufficient capacitor discharge may cause an electric shock.

Do not perform repair work on the electric sections with wet hands. Doing so may cause an electric shock.

Do not start or stop the air conditioner by means of connecting or disconnecting the power plug. Doing so may cause an electric shock or fire.

When conducting repair work only use components included in the parts list for the corresponding unit and perform the work with the appropriate tools. Incorrect or poor repair work may cause an electric shock or fire.

Never modify the unit. Doing so may cause an electric shock or fire.

Perform all electric work according to local applicable regulations related to electrical equipment or interior wiring regulation and make sure to use the exclusive circuit. Insufficient capacity to the electric circuit or defective arrangement results may cause an electric shock or fire.

Make sure to replace any power cable or lead wire showing any signs of scratch or deterioration. Failure to do so may cause an electric shock, overheating or fire.

Make sure that there is no dust on or slack in the power plug and insert fully into the socket. Dust or incomplete connections may cause an electric shock or fire.

Do not damage or process the power cord, as it may cause an electric shock or fire.

Prohibit

For the wiring between the indoor unit and outdoor unit, securely fix the specified cable onto the terminal plate. Poorly fixed wiring may cause a heat or fire.

After connecting the wiring between the indoor unit and outdoor unit, attach the terminal cover securely. Incomplete attachment of the terminal cover may cause overheating or fire.

Warning

If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.

If refrigerant gas leaks during the work, ventilate the room. If refrigerant gas catches fire, harmful gas may be generated.

Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle. If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle, which may cause a unit breakdown."

When the welded section of the compressor intake or discharge pipe is to be disconnected, perform it in a well-ventilated place after sufficiently recovering the refrigerant gas. Any residue gas may jet out refrigerant or refrigerating machine oil, which may cause an injury.

When the work is to be performed in a high place (About 2 meters or more), make sure to wear a safety helmet, gloves and safety belt. Insufficient safety gear may cause a serious injury in case of a fall.

When the unit is to be relocated, confirm that the new installation location has sufficient strength for the weight of the unit. Insufficient strength of the installation location and incomplete installation work may cause an injury due to the unit falling.

When the remote controller batteries are replaced, dispose of the old batteries out of the reach of children. If a child swallows a battery, make sure that the child gets immediate medical attention.

Caution

Prohibit

Do not wash the air conditioner with water, as this may cause an electric shock or fire.

For the repair work in places with high humidity or moisture, make sure to ground the unit. Failure to do so may cause an electric shock.

Confirm that the component attachment position, wiring condition, soldering condition and connector connection are normal. If not, it may cause overheating or fire.

Confirm that the temperature around the compressor is not too high, and then perform the repair work. Failure to do so may cause a burn.

Perform welding work in a place with good ventilation. If the work is performed in a poorly ventilated area, it might cause a lack of oxygen.

If the installation plate or attachment frame has deteriorated due to corrosion, etc., replace it. Failure to do so may cause an injury due to the unit falling.

When the cleaning is to be performed, make sure to turn off the power and pull out the plug. Touching the fan that is rotating at high speed may result in an injury.

When the indoor unit is to be removed, do not place it on an incline. Doing so may cause wet furniture because water left inside may trickle down.

Do not hold the sharp end of the unit or the aluminum fins, as it may cause an injury to your hand or finger.

Prohibit

After repairs, make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more. Any insulation error may cause an electric shock.

After repairs, make sure to check the drainage of the indoor unit. Inappropriate drainage may cause wet furniture and floors due to water leakage.

Page

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications 2-2. Major Component Specifications 2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts 5-2. Cooling Capacity 5-3. Cooling Capacity (Low Ambient) 5-4. Heating Capacity 5-5. Air Throw Distance Charts

6. ELECTRICAL DATA

6-1. Electrical Characteristics 6-2. Electric Wiring Diagrams

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7 11 15

20 24 26 28 30

32 34

7. MAINTENANCE

7-1. Address Setting of the Remote Control Unit 7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit

8. FUNCTIONS

8-1. Operation Functions 8-2. Protective Functions

9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)

9-1. Precautions before Performing Inspection or Repair 9-2. Method of Self-Diagnostics 9-3. Checking the Indoor and Outdoor Units 9-4. Trouble Diagnosis of Fan Motor 9-5. Noise Malfunction and Electromagnetic Interference

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37 38

39 41

43 43 46 50 52

10. CHECKING ELECTRICAL COMPONENTS

10-1. Measurement of Insulation Resistance 10-2. Checking Continuity of Fuse on PCB Ass'y

11. REFRIGERANT R410A: SPECIAL PRECAUTIONS WHEN SERVICING UNIT

11-1. Characteristics of New Refrigerant R410A 11-2. Checklist before Servicing 11-3. Tools Specifically for R410A 11-4. Tubing Installation Procedures 11-5. In Case of Compressor Malfunction 11-6. In Case Refrigerant is Leaking 11-7. Charging Additional Refrigerant 11-8. Retro-Fitting Existing Systems

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Page

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53 54

55 56 57 57 58 60 61 61

APPENDIX A Operating Instructions

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APPENDIX B INSTALLAION INSTRUCTIONS

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A-1

A-2

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

Maximum

Minimum

Maximum

Minimum

95 °F DB / 71 °F WB 67 °F DB / 57 °F WB 80 °F DB / 67 °F WB – DB / – WB

115 °F DB 0 °F DB 75 °F DB / 65 °F WB – DB / 0 °F WB

2. SPECIFICATIONS

2-1. Unit Specifications

Indoor Unit CS-KE18NKU Outdoor Unit CU-KE18NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

EER BTU/h/W 11.7 COP W/W - 3.81 SEER BTU/Wh 20 HSPF

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 15 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g)

Features

Refrigerant Control Operation Sound (*Qt = Quiet mode) Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Refrigerant Tube Kit

Unit Dimensions

Height s Width s Depth

Package Dimensions

Height s Width s Depth

Weight

Dimensions & Weight

Shipping Volume

Indoor : Hi/Me/Lo/Qt* Outdoor : Hi

Narrow tube Wide tube

Net Shipping

BTU/h

BTU/h BTU/h

BTU/Wh

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

(mm)

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

17,500

524(890) / 441(749) / 377(641) 541(919) / 471(800) / 400(680)Air Circulation (Hi / Me / Lo) ft3/min (m3/h)

V A

WPower Input

1,500

%Power Factor 93 93

A 17.5

inch

11-23/32 s 41-15/16 s 8-5/8 26-3/8 s 34-21/32 s 11-7/32

11-27/32s45-1/8s15-5/32

)

( 4,000 to 17,500 )

5.15

( 1.2 to 5.15 )

7.0

( 1.2 to 7.0 ) ( 250 to 1,500 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

(298 s 1,065 s 219) (670 s 880 s 285)

(301 s 1,146 s 385)

26.5

33.1

4.59

230V Single-Phase 60Hz

Cooling Heating

20,400

6.0

13,100

4,400

4.89 -Moisture Removal (High) Pints/h 187 to 253

7.4

1,575

-10

Microprocessor / I.C. Thermistor

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 2.87 (1,300)

Electric Expansion Valve

Flare Type

25 (7.5) 1/4 (6.35) 1/2 (12.7)

Optional

28-27/32s39-27/32s14-29/32

(733 s 1,012 s 379) (12.0) (15.0) (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

< 230V >

( 4,400 to 20,400 ) ( 1.3 to 6.0 )

( 1.3 to 7.4 ) ( 270 to 1,575 )

41 / 38 / 30 / 2842 / 38 / 30 / 28

5251

Outdoor UnitIndoor Unit

97.0

(44.0)

105.8

(48.0)

9.88

(0.28)

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

80 °F DB / 67 °F WB 95 °F DB / 75 °F WB 47 °F DB / 43 °F WB

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature

Indoor Unit CS-KE18NKU Outdoor Unit CU-KE18NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Available Voltage Range Running Amperes

BTU/h

BTU/h BTU/h

WPower Input

17,500

524(890) / 441(749) / 377(641) 541(919) / 471(800) / 400(680)Air Circulation (Hi / Me / Lo) ft3/min (m3/h)

V A

1,500

( 4,000 to 17,500 )

5.15

( 1.2 to 5.15 )

7.7

( 1.2 to 7.7 ) ( 250 to 1,500 )

%Power Factor 94 93 EER BTU/h/W 11.7 COP W/W - 3.81 SEER BTU/Wh 20 HSPF

Electrical Rating

Compressor Locked Rotor Amperes

BTU/Wh

A 17.5 Fuse or Circuit Breaker Capacity A 15 Controls / Temperature Control Control Unit Timer

24-Hour ON or OFF Timer, 1-Hour OFF Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g)

Features

Refrigerant Control Operation Sound (*Qt = Quiet mode)

Indoor : Hi/Me/Lo/Qt* Outdoor : Hi

dB-A dB-A

Refrigerant Tubing Connections

ft (m)Max. allowable tubing length at shipment Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Refrigerant Tube Kit

Unit Dimensions

Height s Width s Depth

Package Dimensions

Height s Width s Depth

Weight

Dimensions & Weight

Shipping Volume

Net Shipping

inch

(mm)

inch

(mm)

Ibs (kg) Ibs (kg)

cu.ft (m

11-23/32 s 41-15/16 s 8-5/8 26-3/8 s 34-21/32 s 11-7/32

(298 s 1,065 s 219) (670 s 880 s 285)

11-27/32s45-1/8s15-5/32

26.5

33.1

)

4.59

208V Single-Phase 60Hz

Cooling Heating

20,400

6.0

13,100

4,400

4.89 -Moisture Removal (High) Pints/h

187 to 253

8.1

1,575

-10

Microprocessor / I.C. Thermistor

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 2.87 (1,300)

Electric Expansion Valve

Flare Type

25 (7.5) 1/4 (6.35) 1/2 (12.7)

Optional

28-27/32s39-27/32s14-29/32

(733 s 1,012 s 379)(301 s 1,146 s 385) (12.0) (15.0) (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

< 208V >

( 4,400 to 20,400 ) ( 1.3 to 6.0 )

( 1.3 to 8.1 )

( 270 to 1,575 )

41 / 38 / 30 / 2842 / 38 / 30 / 28

5251

Outdoor UnitIndoor Unit

97.0

(44.0)

105.8

(48.0)

9.88

(0.28)

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature

47 °F DB / 43 °F WB

Indoor Unit CS-KE24NKU Outdoor Unit CU-KE24NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Air Circulation (Hi / Me / Lo) ft3/min (m3/h)

Available Voltage Range Running Amperes

EER BTU/h/W 9.84 COP W/W - 3.41 SEER BTU/Wh 17 HSPF

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 20 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g)

Features

Refrigerant Control Operation Sound (*Qt = Quiet mode) Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Refrigerant Tube Kit

Unit Dimensions

Height s Width s Depth

Package Dimensions

Height s Width s Depth

Weight

Dimensions & Weight

Shipping Volume

Indoor : Hi/Me/Lo/Qt* Outdoor : Hi

Narrow tube Wide tube

Net Shipping

BTU/h

BTU/h BTU/h

BTU/Wh

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

(mm)

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

24,200

659(1,120) / 571(970) / 494(839) 683(1,161) / 583(991) / 518(880)

V A

WPower Input

2,460

%Power Factor 99 90

A 17.5

inch

11-23/32 s 41-15/16 s 8-5/8 29-1/8 s 35-7/16 s 12-19/32

11-27/32s45-1/8s15-5/32

)

( 4,000 to 24,200 )

7.1

( 1.2 to 7.1 )

10.8

( 1.3 to 10.8 ) ( 280 to 2,460 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

(298 s 1,065 s 219) (740 s 900 s 320)

(301 s 1,146 s 385)

26.5

33.1

4.59 (0.13)

230V Single-Phase 60Hz

Cooling Heating

29,000

8.5

14,800

9,400

4.89 -Moisture Removal (High) Pints/h 187 to 253

12.0

2,490

- 8.5

Microprocessor / I.C. Thermistor

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 4.30 (1,950)

Electric Expansion Valve

Flare Type

33 (10)

1/4 (6.35)

5/8 (15.88)

Optional

34-3/16 s 41-11/32 s 16-21/32

(868 s 1,050 s 423) (12.0) (15.0)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

< 230V >

( 4,400 to 29,000 ) ( 1.3 to 8.5 )

( 1.3 to 12.0 ) ( 290 to 2,490 )

46 / 43 / 40 / 3047 / 44 / 41 / 30

5655

Outdoor UnitIndoor Unit

130.1

(59.0)

138.9

(63.0)

12.71

(0.36)

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature 47 °F DB / 43 °F WB

Indoor Unit CS-KE24NKU Outdoor Unit CU-KE24NKU

Voltage Rating

Total Capacity

Sensible Capacity Latent Capacity

Performance

Air Circulation (Hi / Me / Lo) ft3/min (m3/h)

Available Voltage Range Running Amperes

EER BTU/h/W 9.84 COP W/W - 3.41 SEER BTU/Wh 17 HSPF

Electrical Rating

Compressor Locked Rotor Amperes Fuse or Circuit Breaker Capacity A 20 Controls / Temperature Control Control Unit Timer

Indoor / OutdoorFan Speeds

Airflow Direction (Indoor) Horizontal

Air Filter Compressor Refrigerant / Amount charged at shipment Ibs (g)

Features

Refrigerant Control Operation Sound (*Qt = Quiet mode) Refrigerant Tubing Connections

Refrigerant inch (mm) Tube Diameter inch (mm) Refrigerant Tube Kit / Accessories

Unit Dimensions

Height s Width s Depth

Package Dimensions

Height s Width s Depth

Weight

Dimensions & Weight

Shipping Volume

Indoor : Hi/Me/Lo/Qt* Outdoor : Hi

Narrow tube Wide tube

Net Shipping

BTU/h

BTU/h BTU/h

BTU/Wh

Vertical

dB-A dB-A

ft (m)Max. allowable tubing length at shipment

(mm)

(mm) Ibs (kg) Ibs (kg)

cu.ft (m

24,200

659(1,120) / 571(970) / 494(839) 683(1,161) / 583(991) / 518(880)

V A

WPower Input

2,460

%Power Factor 98 89

A 17.5

inch

11-23/32 s 41-15/16 s 8-5/8 29-1/8 s 35-7/16 s 12-19/32

11-27/32s45-1/8s15-5/32

)

( 4,000 to 24,200 )

7.1

( 1.2 to 7.1 )

12.1

( 1.3 to 12.1 ) ( 280 to 2,460 )

24-Hour ON or OFF Timer, 1-Hour OFF Timer

(298 s 1,065 s 219) (740 s 900 s 320)

(301 s 1,146 s 385)

26.5

33.1

4.59 (0.13)

208V Single-Phase 60Hz

Cooling Heating

29,000

8.5

14,800

9,400

4.89 -Moisture Removal (High) Pints/h 187 to 253

13.5

2,490

- 8.5

Microprocessor / I.C. Thermistor

Wireless Remote Control Unit

Auto and 3 steps / Auto (Hi, Me, Lo)

Manual

Auto

Washable, Anti-Mold

DC Twin Rotary (Inverter)

R410A / 4.30 (1,950)

Electric Expansion Valve

Flare Type

33 (10)

1/4 (6.35)

5/8 (15.88)

Optional / Air Clean Filter

34-3/16 s 41-11/32 s 16-21/32

(868 s 1,050 s 423) (12.0) (15.0)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

< 208V >

( 4,400 to 29,000 ) ( 1.3 to 8.5 )

( 1.3 to 13.5 ) ( 290 to 2,490 )

46 / 43 / 40 / 3047 / 44 / 41 / 30

5655

Outdoor UnitIndoor Unit

130.1

(59.0)

138.9

(63.0)

12.71

(0.36)

Remarks: Rating conditions are:

Cooling: Indoor air temperature 80 °F DB / 67 °F WB

Outdoor air temperature 95 °F DB / 75 °F WB

Heating: Indoor air temperature 70 °F DB

Outdoor air temperature 47 °F DB / 43 °F WB

2-2. Major Component Specifications

2-2-1. Indoor Unit

Indoor Unit CS-KE18NKU

Control PCB

Part No.

Controls

Control Circuit Fuse

Fan

Type Q'ty ... Dia. and Length

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Nominal Output

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over-Current Protection Over-Heat Protection

Run Capacitor Micro F

inch (mm)

Ohm

VAC

CB-CS-KE18NKU

Microprocessor

250V 3A

Cross-Flow

1 ... D3-5/8 / L33-9/32 (D92/L845)

DC Motor

SIC-41CVJ-D847-3...1

1,250 / 1,300

Internal Controller

Ye s Ye s

Flap Motor

Type Stepping Motor

Model

Rating

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Heat Exchanger Coil

Coil

Rows Fins Per inch

(m2)

Each Pair of Terminal : 400 +/- 7%

Aluminum Plate Fin / Copper Tube

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

MP24Z3-12V

3.07 (0.285) Face Area

DC 12V

19.5

Indoor Unit CS-KE24NKU

Control PCB

Part No.

Controls

Control Circuit Fuse

Fan

Type Q'ty ... Dia. and Length

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat)

Nominal Output

Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over-Current Protection Over-Heat Protection

Run Capacitor Micro F

inch (mm)

Ohm

VAC

CB-CS-KE24NKU

Microprocessor

250V 3A

Cross-Flow

1 ... D3-5/8 / L33-9/32 (D92/L845)

DC Motor

SIC-41CVJ-D847-3...1

1,500 / 1,550

Internal Controller

Ye s Ye s

Flap Motor

Type Stepping Motor

Model

MP24Z3-12V Rating Coil Resistance Ohm

Each Pair of Terminal : 400 +/- 7%

(Ambient Temp. 77 °F (25 °C))

Heat Exchanger Coil

Coil

Aluminum Plate Fin / Copper Tube

Rows

Fins Per inch

(m2)

3.07 (0.285) Face Area

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

DC 12V

19.5

2-2-2. Outdoor Unit

Outdoor Unit CU-KE18NKU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type

Compressor Model / Nominal Output Compressor Oil ... Amount

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-KE18NKU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

C-6RVN93H0M / 1,050W

FV50S ... 0.74 (350)

R - S :

0.482

S - T :

0.482

T - R :

0.482

Ye s Ye s Ye s

CS-7L115

Open : 239 °F (115 °C), Close : 203 °F (95 °C)

Fan

Type

Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat) Nominal Output Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows

Fins per inch

Face Area

Ohm

Micro F

VAC

(m2)

Propeller

1 ... D16-17/32 (D420)

DC Motor

SIC-67FV-F460-1 ... 1

820 / 850

RED - WHT :

WHT - BLU :

BLU - RED :

77.5

Internal Controller

Ye s

Aluminum Plate Fin / Copper Tube

21.2

5.49 (0.510)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Outdoor Unit CU-KE24NKU

Control PCB

Part No.

Controls

Control Circuit Fuse

Compressor

Type

Compressor Model / Nominal Output Compressor Oil ... Amount

Coil Resistance (Ambient Temp. 68 °F (20 °C))

Safety Device

CT (Peak current cut-off control) Compressor Discharge Temp. Control

Operation cut-off control in abnormal ambient Temp.

Overload Relay

Run Capacitor

Crankcase Heater

Pints (cc)

Ohm

Model

Operation Temp.

Micro F

VAC

CB-CU-KE24NKU

Microprocessor

250V 25A

DC Twin Rotary (Hermetic)

G8T265FU1JW / 2,410W

POE ... 1.49 (700)

U - V :

0.36

V - W :

0.36

W - U :

0.36

Ye s Ye s Ye s

CS-7L115

Open : 239 °F (115 °C), Close : 203 °F (95 °C)

230V 30W

Fan

Type

Q'ty ... Dia. inch (mm)

Fan Motor

Type Model ... Q'ty No. of Poles

Rough Measure RPM (Cool / Heat) Nominal Output Coil Resistance

(Ambient Temp. 68 °F (20 °C))

Safety Device

Type Over- Current Protection Over- Heat Protection

Run Capacitor

Heat Exchanger Coil

Coil

Rows

Fins per inch

Face Area

Ohm

Micro F

VAC

(m2)

Propeller

1 ... D18-1/8 (D460)

DC Motor

SIC-71FW-D490-1 ... 1

850 / 850

Internal Controller

Ye s Ye s

Aluminum Plate Fin / Copper Tube

18.1

6.40 (0.595)

External Finish Acrylic baked-on enamel finish

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

2-3. Other Component Specifications

Indoor Unit CS-KE18NKU CS-KE24NKU Outdoor Unit CU-KE18NKU CU-KE24NKU

• Indoor air temp sensor

(Model:PTM-D51H-S4-2 TH2)

• Indoor heat exchanger sensor

(Model:PTM-D51H-S4-2 TH1)

• Compressor temp sensor

(Model:TKS293B)

Resistance (k ohm)

59 68 77 86 95 104

(10) (15) (20) (25) (30) (35) (40)

Temperature °F (°C)

200

180

160 140

120

100

Resistance (k ohm)

32 50 68 86 104 122 140 158 176 194 (0) (10) (20) (30)(40) (50) (60) (70)(80) (90)

Temperature °F (°C)

• Outdoor air temp sensor

(Model:TKS295B)

• Outdoor heat exchanger sensor

(Model:TKS292B)

Resistance (k ohm)

4 5 14 23 32 41 50 59 68

(

20)(-15)(-10) (-5) (0) (5) (10) (15) (20)

Temperature °F (°C)

3. DIMENSIONAL DATA

Indoor Unit CS-KE18NKU

CS-KE24NKU

25/32

1-5/16

2-3/32

5-19/32

2-3/4

1-1/161-27/32

7-23/32

Unit: inch(mm)

(852-0-0010-216-00-0)

Outdoor Unit CU-KE18NKU

1-3/8

11-17/32

23-15/16

ID:23/32

34-21/32(880)

4-ID:15/16

5-11/32

15/32

2-17/32

12-7/32

13-5/32

11-7/32(285)

Wide tube service valve dia.1/2" (12.70)

Narrow tube service valve dia.1/4" (6.35)

23/32

1-13/16

2-13/32

26-3/8(670)

3/32

5-23/32

Unit: inch(mm)

(852-0-0010-132-00-0)

2-5/32

4-3/8

6-17/32

Outdoor Unit CU-KE24NKU

1-3/8

11-17/32

ID:23/32

35-7/16(900)

23-15/16

5-ID:15/16

5-11/32

15/32

2-15/16

13-19/32

14-17/32

12-19/32(320)

Narrow tube service valve dia.1/4" (6.35)

Wide tube service valve dia.5/8" (15.88)

23/32

1-21/32

2-7/8

29-1/8(740)

5-29/32

2-1/32 4-1/2

Unit: inch(mm)

(852-0-0010-118-00-0)

4-7/16

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit CS-KE18NKU CS-KE24NKU

Indoor unit Outdoor unit

Heat exchanger

Wide tube

Narrow tube

O.D. 1/4" (6.35 mm)

Outdoor Unit CU-KE18NKU

CU-KE24NKU

Wide tube service valve

Muffler

4-way valve

Narrow tube service valve

Strainer

*1 O.D.1/2"(12.7 mm)

O.D.5/8"(15.88 mm)

.........

Accumulator

High pressure

switch

H.P.

Capillary tube for

Electric

expansion

valve

split flow

CS/CU-KE18NKU CS/CU-KE24NKU

Compressor

Heat exchanger

Cooling cycle (Defrosting cycle)

Heating cycle

Insulation of Refrigerant Tubing

IMPORTANT

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min. 5/16"(8 mm).

After a tube has been insulated,

CAUTION

never try to bend it into a narrow curve because it can cause the tube to break or crack.

Thickness: Min. 5/16"(8 mm)

Wide tube

Insulation

Thickness: Min. 5/16"(8 mm)

Narrow tube

5. PERFORMANCE DATA

5-1. Temperature Charts

Indoor Unit CS-KE18NKU Outdoor Unit CU-KE18NKU

Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)

(1) Low pressure performance chart

174

(1.2)

159

(1.1)

145

psig(MPaG)

(1.0)

131

(0.9)

117

(0.8)

104

(0.7)

(0.6)

Low pressure at wide tube service valve

(0.5)

-4

(-20)

(-15)

(-10)

(-5)

(2) Operating current performance chart

32 (0)

41 (5)

(10)

Outdoor inlet air DB temp.°F(°C)

Indoor Air Temp.86°F (30°C)

(15)

(20)

Indoor Air Temp.86°F (30°C)

80°F (27°C)

75°F (24°C)

80°F (27°C)

80°F (27°C) 75°F (24°C)

75°F (24°C)

(25)

(30)

Hi FanLo fan

(35)

Hi FanLo fan

104 (40)

Operating current (A)

-4

(-20)

(-15)

(-10)

(-5)

(3) Indoor discharge air performance chart

64.4 (18)

60.8 (16)

57.2 (14)

53.6 (12)

50.0 (10)

Indoor discharge air temperature °F(°C)

46.4 (8)

-4

(-20)

(-15)

(-10)

(-5)

32 (0)

41 (5)

(10)

Outdoor inlet air DB temp.°F(°C)

32 (0)

41 (5)

(10)

Outdoor inlet air DB temp.°F(°C)

(15)

(20)

Indoor Air Temp.86°F (30°C)

(20)

(25)

80°F (27°C)

75°F (24°C)

(25)

(30)

(35)

Hi FanLo fan

(35)

104 (40)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

Indoor Unit CS-KE18NKU Outdoor Unit CU-KE18NKU

Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)

(1) High pressure performance chart

494

(3.4)

psig (MPaG)

421

(2.9)

348

(2.4)

275

High pressure at wide tube service valve

(1.9)

(2) Operating current performance chart

Operating current (A)

F (23

Indoor air temp.73°F (23°C)

Indoor air temp.73

(Ð5)32(0)41(5)50(10)59(15)68(20)77(25)

F (21

70°F (21°C)

F (

63°F (17°C)

Outdoor inlet air DB temp. °F(°C)

F (23

F (21

70°F (21°C)

Indoor air temp.73°F (23°C)

Indoor air temp.73

F (17

63°F (17°C)

(Ð5)32(0)41(5)

(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

131(55)

122(50)

113(45)

104(40)

Indoor air temp.73°F (23°C)

Indoor air temp.73

F (23

F (21

70°F (21°C)

F (17

63°F (17°C)

95(35)

86(30)

Indoor discharge air temperature °F(°C)

(Ð5)32(0)41(5)50(10)

(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

• Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in heating mode. (Refer to "8-2. Protective Functions Overload prevention during heating.")

Indoor Unit CS-KE24NKU Outdoor Unit CU-KE24NKU

Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)

(1) Low pressure performance chart

174

(1.2)

159

(1.1)

145

psig(MPaG)

(1.0)

131

(0.9)

117

(0.8)

104

(0.7)

(0.6)

Low pressure at wide tube service valve

(0.5)

-4

(-20)

(-15)

(-10)

(-5)

(2) Operating current performance chart

Operating current (A)

-4

(-20)

(-15)

(-10)

(-5)

32 (0)

41 (5)

(10)

Outdoor inlet air DB temp.°F(°C)

32 (0)

41 (5)

(10)

Outdoor inlet air DB temp.°F(°C)

Indoor Air Temp.86°F (30°C)

(15)

(20)

Indoor Air Temp

Indoor Air Temp.86°F (30°C)

(20)

80°F (27°C)

75°F (24°C)

F (27

80°F (27°C)

F (24

75°F (24°C)

.86

° °

(25)

C) C)

(25)

F (30

Hi FanLo fan

(30)

(35)

Hi FanLo fan

(35)

104 (40)

(3) Indoor discharge air performance chart

68.0 (20)

64.4 (18)

60.8 (16)

57.2 (14)

53.6 (12)

50.0 (10)

46.4 (8)

Indoor discharge air temperature °F(°C)

42.8 (6)

-4

(-20)

(-15)

(-10)

(-5)

32 (0)

Outdoor inlet air

41 (5)

(10)

DB temp.°F(°C)

Indoor Air Temp.86°F (30°C)

(15)

(20)

80°F (27°C)

75°F (24°C)

(25)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

(30)

Hi FanLo fan

(35)

104 (40)

Indoor Unit CS-KE24NKU Outdoor Unit CU-KE24NKU

Heating Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)

(1) High pressure performance chart

494

(3.4)

psig (MPaG)

421

(2.9)

348

(2.4)

275

High pressure at wide tube service valve

(1.9)

(2) Operating current performance chart

Operating current (A)

F (23

Indoor air temp.73°F (23°C)

Indoor air temp.73

(Ð5)32(0)41(5)50(10)59(15)68(20)77(25)

F (21

70°F (21°C)

F (

63°F (17°C)

Outdoor inlet air DB temp. °F(°C)

F (23

F (21

Indoor air temp.73°F (23°C)

Indoor air temp.73

70°F (21°C)

F (17

63°F (17°C)

(Ð5)32(0)41(5)

(10)59(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

(3) Indoor discharge air performance chart

131(55)

122(50)

113(45)

104(40)

Indoor air temp

Indoor air temp.73

F (23

.73°F (23°C)

F (21

70°F (21°C)

F (17

63°F (17°C)

95(35)

86(30)

Indoor discharge air temperature °F(°C)

(Ð5)32(0)41(5)50(10)

(15)68(20)77(25)

Outdoor inlet air DB temp. °F(°C)

NOTE

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.

5-2. Cooling Capacity

Indoor Unit : CS-KE18NKU Outdoor Unit : CU-KE18NKU Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 17,500 BTU/h AIR FLOW RATE: 524 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 14,130 14,230 14,340 14,030 13,720 10,700

(15.0) 80 (26.7) SHC 15,960 16,060 16,060 15,860 15,320 10,700

63 76 (24.4) SHC 12,810 12,610 12,300 12,000 11,690 9,550

(17.2) 80 (26.7) SHC 14,640 14,340 14,130 13,830 13,520 10,940

67 76 (24.4) SHC 10,780 10,470 10,270 10,060 9,660 7,520

(19.4) 80 (26.7) SHC 12,500 12,300 12,100 11,790 11,490 9,350

71 76 (24.4) SHC 8,540 8,330 8,130 7,930 7,420 5,490

(21.7) 80 (26.7) SHC 10,270 10,060 9,860 9,660 9,150 7,210

75 76 (24.4) SHC 6,300 6,200 5,990 5,790 5,180 3,450

(23.9) 80 (26.7) SHC 8,130 7,930 7,720 7,620 7,010 5,280

F (oC) AMBIENT TEMP. oF (oC)

TC 16,270 16,440 16,590 16,040 15,320 10,700

72 (22.2) SHC 12,400 12,500 12,610 12,300 12,000 9,860

84 (28.9) SHC 16,270 16,440 16,590 16,040 15,320 10,700 88 (31.1) SHC 16,270 16,440 16,590 16,040 15,320 10,700

TC 18,460 17,920 17,330 16,770 16,040 10,940

72 (22.2) SHC 11,080 10,880 10,570 10,370 9,960 7,830

84 (28.9) SHC 16,370 16,060 15,860 15,560 15,250 10,940 88 (31.1) SHC 18,100 17,790 17,330 16,770 16,040 10,940

TC 19,190 18,650 18,060 # 17,500 16,560 11,150

72 (22.2) SHC 9,050 8,740 8,540 8,330 7,930 5,790

84 (28.9) SHC 14,230 14,030 13,830 13,520 13,110 11,080 88 (31.1) SHC 15,960 15,760 15,450 15,250 14,840 11,150

TC 19,880 19,350 18,760 18,220 16,840 11,330

CI 0.91 1.10 1.29 1.45 1.59 1.24

72 (22.2) SHC 6,810 6,600 6,400 6,200 5,690 3,760

84 (28.9) SHC 12,000 11,790 11,590 11,390 10,880 8,940 88 (31.1) SHC 13,720 13,520 13,320 13,110 12,610 10,670

TC 20,470 19,940 19,350 18,830 17,030 11,450

84 (28.9) SHC 9,860 9,660 9,450 9,350 8,740 6,910 88 (31.1) SHC 11,590 11,390 11,180 10,980 10,470 8,640

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

0.87 1.04 1.21 1.36 1.54 1.24

0.88 1.06 1.23 1.39 1.57 1.24

0.89 1.08 1.26 1.42 1.59 1.24

0.93 1.13 1.32 1.48 1.59 1.24

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Indoor Unit : CS-KE24NKU Outdoor Unit : CU-KE24NKU Power Supply : 230V Single Phase 60Hz

< Cooling Capacity >

RATING CAPACITY: 24,200 BTU/h AIR FLOW RATE: 659 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 65 75 85 95 105 115

59 76 (24.4) SHC 17,730 17,860 17,990 17,990 16,330 11,020

(15.0) 80 (26.7) SHC 19,910 20,040 20,040 20,170 18,230 11,020

63 76 (24.4) SHC 16,970 16,580 16,200 15,810 13,770 10,690

(17.2) 80 (26.7) SHC 19,140 18,760 18,370 17,990 15,940 11,270

67 76 (24.4) SHC 14,410 14,020 13,640 13,380 11,210 8,390

(19.4) 80 (26.7) SHC 16,580 16,200 15,810 15,560 13,380 10,570

71 76 (24.4) SHC 11,590 11,330 10,950 10,690 8,520 5,830

(21.7) 80 (26.7) SHC 13,770 13,380 13,130 12,870 10,690 8,000

75 76 (24.4) SHC 8,900 8,640 8,260 8,130 5,960 3,520

(23.9) 80 (26.7) SHC 10,950 10,690 10,440 10,310 8,130 5,700

F (oC) AMBIENT TEMP. oF (oC)

TC 21,050 21,240 21,410 21,470 18,230 11,020

72 (22.2) SHC 15,690 15,810 15,810 15,940 14,280 10,950

84 (28.9) SHC 21,050 21,240 21,410 21,470 18,230 11,020 88 (31.1) SHC 21,050 21,240 21,410 21,470 18,230 11,020

TC 25,430 24,710 23,910 23,200 18,670 11,270

72 (22.2) SHC 14,920 14,530 14,150 13,770 11,720 8,640

84 (28.9) SHC 21,190 20,810 20,420 20,170 17,990 11,270 88 (31.1) SHC 23,240 22,980 22,470 22,210 18,670 11,270

TC 26,410 25,690 24,890 # 24,200 19,060 11,490

72 (22.2) SHC 12,230 11,970 11,590 11,330 9,160 6,340

84 (28.9) SHC 18,630 18,250 17,860 17,610 15,430 11,490 88 (31.1) SHC 20,680 20,290 20,040 19,650 17,480 11,490

TC 27,350 26,640 25,840 25,180 19,390 11,670

72 (22.2) SHC 9,540 9,160 8,900 8,640 6,470 3,780

84 (28.9) SHC 15,810 15,560 15,170 14,920 12,740 10,180 88 (31.1) SHC 17,860 17,610 17,220 16,970 14,790 11,670

TC 28,120 27,420 26,630 26,020 19,600 11,790

84 (28.9) SHC 13,130 12,870 12,490 12,360 10,180 7,750 88 (31.1) SHC 15,170 14,920 14,660 14,410 12,230 9,800

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

(18.3) (23.9) (29.4) (35.0) (40.6) (46.1)

1.39 1.65 1.91 2.13 2.04 1.40

1.41 1.68 1.95 2.17 2.04 1.40

1.43 1.72 2.00 2.22 2.04 1.40

1.46 1.76 2.05 2.27 2.04 1.40

1.50 1.80 2.10 2.32 2.04 1.40

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB : Outdoor Ambient Temp. 95 °F (35 °C) DB

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

5-3. Cooling Capacity (Low Ambient)

Indoor Unit : CS-KE18NKU Outdoor Unit : CU-KE18NKU Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 17,500 BTU/h AIR FLOW RATE: 524 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 0 5 15 25 35 45 55

59 76 (24.4) SHC 13,520 13,520 13,520 15,140 13,620 13,620 13,620

(15.0) 80 (26.7) SHC 15,050 15,040 15,010 15,140 15,200 15,260 15,230

63 76 (24.4) SHC 11,280 11,280 11,280 15,350 11,490 11,490 11,590

(17.2) 80 (26.7) SHC 13,110 13,110 13,110 15,350 13,220 13,320 13,320

67 76 (24.4) SHC 8,940 8,940 9,050 15,460 9,250 9,350 9,450

(19.4) 80 (26.7) SHC 10,780 10,780 10,880 15,460 11,080 11,180 11,180

71 76 (24.4) SHC 6,500 6,600 6,600 15,440 7,010 7,110 7,210

(21.7) 80 (26.7) SHC 8,330 8,330 8,440 15,440 8,740 8,940 8,940

75 76 (24.4) SHC 4,260 4,260 4,370 15,300 4,770 4,880 4,980

(23.9) 80 (26.7) SHC 5,990 6,100 6,200 15,300 6,600 6,710 6,810

F (oC) AMBIENT TEMP. oF (oC)

(-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8)

TC 15,050 15,040 15,010 15,140 15,200 15,260 15,230

72 (22.2) SHC 11,790 11,790 11,790 15,140 11,890 11,890 11,890

84 (28.9) SHC 15,050 15,040 15,010 15,140 15,200 15,260 15,230 88 (31.1) SHC 15,050 15,040 15,010 15,140 15,200 15,260 15,230

TC 15,050 15,050 15,090 15,350 15,480 15,620 15,640

72 (22.2) SHC 9,550 9,550 9,550 15,350 9,760 9,860 9,860

84 (28.9) SHC 14,740 14,740 14,840 15,350 14,950 15,050 15,050 88 (31.1) SHC 15,050 15,050 15,090 15,350 15,480 15,620 15,640

TC 14,890 14,920 15,040 15,460 15,680 15,910 16,000

72 (22.2) SHC 7,210 7,210 7,320 15,460 7,520 7,620 7,720

84 (28.9) SHC 12,500 12,500 12,500 15,460 12,810 12,910 12,910 88 (31.1) SHC 14,230 14,230 14,230 15,460 14,540 14,640 14,640

TC 14,550 14,610 14,820 15,440 15,780 16,120 16,290

72 (22.2) SHC 4,880 4,880 4,880 15,440 5,280 5,380 5,490

84 (28.9) SHC 10,060 10,060 10,160 15,440 10,470 10,670 10,670 88 (31.1) SHC 11,790 11,790 11,890 15,440 12,200 12,300 12,400

TC 14,050 14,130 14,450 15,300 15,760 16,210 16,470

84 (28.9) SHC 7,720 7,830 7,930 15,300 8,330 8,440 8,540 88 (31.1) SHC 9,450 9,450 9,550 15,300 10,060 10,160 10,270

0.71 0.74 0.76 0.63 0.61 0.58 0.61

0.81 0.84 0.85 0.69 0.65 0.61 0.62

0.93 0.96 0.95 0.76 0.70 0.64 0.64

1.07 1.09 1.07 0.84 0.76 0.68 0.67

1.21 1.23 1.19 0.93 0.83 0.73 0.70

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

NOTE

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

Indoor Unit : CS-KE24NKU Outdoor Unit : CU-KE24NKU Power Supply : 230V Single Phase 60Hz

< Cooling Capacity (Low Ambient) >

RATING CAPACITY: 24,200 BTU/h AIR FLOW RATE: 659 CFM

INDOOR OUTDOOR

ENT. TEMP.

WB DB 0 5 15 25 35 45 55

59 76 (24.4) SHC 17,730 17,730 17,730 21,210 17,860 17,730 17,730

(15.0) 80 (26.7) SHC 19,910 19,910 19,910 21,210 19,910 19,910 19,910

63 76 (24.4) SHC 14,790 14,920 14,920 21,460 15,050 15,050 15,170

(17.2) 80 (26.7) SHC 16,970 16,970 16,970 21,460 17,220 17,220 17,350

67 76 (24.4) SHC 11,850 11,850 11,970 21,570 12,230 12,360 12,490

(19.4) 80 (26.7) SHC 14,020 14,020 14,150 21,570 14,410 14,530 14,660

71 76 (24.4) SHC 8,770 8,770 8,900 21,510 9,410 9,410 9,540

(21.7) 80 (26.7) SHC 10,820 10,950 11,080 21,510 11,460 11,590 11,720

75 76 (24.4) SHC 5,700 5,830 6,080 21,270 6,600 6,600 6,850

(23.9) 80 (26.7) SHC 7,880 8,000 8,130 21,270 8,770 8,770 9,030

F (oC) AMBIENT TEMP. oF (oC)

TC 21,090 21,110 20,980 21,210 21,150 21,090 21,140

72 (22.2) SHC 15,690 15,690 15,690 20,420 15,690 15,690 15,690

84 (28.9) SHC 21,090 21,110 20,980 21,210 21,150 21,090 21,140 88 (31.1) SHC 21,090 21,110 20,980 21,210 21,150 21,090 21,140

TC 20,960 21,020 21,030 21,460 21,460 21,470 21,630

72 (22.2) SHC 12,740 12,740 12,740 20,420 13,000 13,000 13,130

84 (28.9) SHC 19,010 19,140 19,140 21,460 19,270 19,270 19,400 88 (31.1) SHC 20,960 21,020 21,030 21,460 21,320 21,320 21,450

TC 20,600 20,700 20,890 21,570 21,640 21,750 22,020

72 (22.2) SHC 9,800 9,800 9,930 20,420 10,180 10,310 10,310

84 (28.9) SHC 16,070 16,070 16,200 21,570 16,580 16,580 16,710 88 (31.1) SHC 18,120 18,250 18,250 21,570 18,630 18,630 18,760

TC 19,950 20,090 20,520 21,510 21,680 21,880 22,310

72 (22.2) SHC 6,600 6,720 6,850 20,420 7,240 7,360 7,490

84 (28.9) SHC 13,000 13,000 13,130 21,510 13,640 13,640 13,890 88 (31.1) SHC 15,050 15,050 15,300 21,510 15,690 15,690 15,940

TC 19,060 19,240 19,940 21,270 21,540 21,860 22,440

84 (28.9) SHC 9,930 10,050 10,310 21,270 10,820 10,950 11,080 88 (31.1) SHC 12,100 12,100 12,360 21,270 12,870 13,000 13,130

TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)

(-17.8) (-15.0) (-9.4) (-3.9) (1.7) (7.2) (12.8)

1.26 1.30 1.20 0.92 1.00 1.06 1.03

1.43 1.47 1.33 1.01 1.07 1.12 1.06

1.64 1.67 1.49 1.11 1.16 1.19 1.11

1.87 1.90 1.68 1.22 1.26 1.27 1.16

2.11 2.13 1.86 1.34 1.37 1.36 1.21

NOTE

Above data does not take Freeze Prevention Protection during cooling operation into account. For this reason, the value may vary from the actual cooling characteristics.

2. Above data represents the value when the operation frequency of a compressor is fixed.

5-4. Heating Capacity

Indoor Unit : CS-KE18NKU Outdoor Unit : CU-KE18NKU Power Supply : 230V Single Phase 60Hz

< Heating Capacity >

RATING CAPACITY: 20,400 BTU/h AIR FLOW RATE: 541 CFM

OUTDOOR INDOOR

ENT. TEMP.

13 (-10.6) TH 13,570 13,560 13,550 13,530 13,510

18 (-7.8) TH 14,610 14,610 14,590 14,570 14,540

23 (-5.0) TH 15,710 15,700 15,690 15,660 15,630

28 (-2.2) TH 16,850 16,840 16,830 16,800 16,760

33 (0.6) TH 18,030 18,020 18,000 17,970 17,930

38 (3.3) TH 19,200 19,190 19,170 19,130 19,090

43 (6.1) TH 20,440 20,430 # 20,400 20,360 20,310

48 (8.9) TH 21,700 21,680 21,650 21,600 21,550

53 (11.7) TH 22,970 22,940 22,910 22,860 22,790

58 (14.4) TH 24,190 24,160 24,120 24,060 23,740

63 (17.2) TH 25,450 25,410 25,360 25,300 23,740

65 (18.3) TH 25,930 25,900 25,850 25,780 23,740

F (oC) AMBIENT TEMP. oF (oC)

WB 60 65 70 75 80

0 (-17.8) TH 11,320 11,320 11,310 11,290 11,270

3 (-16.1) TH 11,700 11,700 11,690 11,680 11,650

8 (-13.3) TH 12,620 12,610 12,600 12,590 12,560

TH : Total Heating Capacity (BTU/h)

(15.6) (18.3) (21.1) (23.9) (26.7)

0.97 1.01 1.06 1.11 1.16

0.98 1.03 1.08 1.13 1.18

1.01 1.06 1.12 1.17 1.22

1.05 1.10 1.16 1.22 1.28

1.09 1.15 1.21 1.27 1.33

1.13 1.19 1.26 1.33 1.40

1.17 1.24 1.32 1.39 1.46

1.22 1.29 1.37 1.45 1.53

1.26 1.34 1.43 1.51 1.59

1.31 1.40 1.49 1.58 1.67

1.37 1.46 1.56 1.65 1.74

1.53 1.63 1.63 1.73 1.83

1.49 1.59 1.70 1.81 1.91

1.56 1.67 1.78 1.89 2.00

1.59 1.70 1.82 1.93 2.04

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 70 °F (21.1 °C) DB : Outdoor Ambient Temp. 47 °F (8.3 °C) DB / 43 °F (6.1 °C) WB

Above data does not take Defrost Operation, Overload Prevention Protection, and/or Cold Air Prevention Protection during heating operation into account. For this reason, the value may vary from the actual heating characteristics.

3. Above data represents the value when the operation frequency of a compressor is fixed.

Indoor Unit : CS-KE24NKU Outdoor Unit : CU-KE24NKU Power Supply : 230V Single Phase 60Hz

< Heating Capacity >

RATING CAPACITY: 29,000 BTU/h AIR FLOW RATE: 683 CFM

OUTDOOR INDOOR

ENT. TEMP.

13 (-10.6) TH 19,360 19,370 19,370 19,360 19,330

18 (-7.8) TH 20,830 20,840 20,840 20,820 20,790

23 (-5.0) TH 22,380 22,390 22,380 22,360 22,330

28 (-2.2) TH 23,990 23,990 23,980 23,960 23,920

33 (0.6) TH 25,650 25,650 25,640 25,610 25,570

38 (3.3) TH 27,290 27,290 27,270 27,240 27,190

43 (6.1) TH 29,030 29,020 # 29,000 28,960 27,610

48 (8.9) TH 30,790 30,780 30,750 30,700 27,610

53 (11.7) TH 32,560 32,540 32,500 30,860 27,610

58 (14.4) TH 34,260 34,240 33,000 30,860 27,610

63 (17.2) TH 36,010 35,000 32,980 30,860 27,610

65 (18.3) TH 36,690 34,940 32,920 30,860 27,610

F (oC) AMBIENT TEMP. oF (oC)

WB 60 65 70 75 80

0 (-17.8) TH 16,200 16,210 16,200 16,190 16,170

3 (-16.1) TH 16,740 16,740 16,740 16,730 16,710

8 (-13.3) TH 18,030 18,030 18,030 18,020 18,000

TH : Total Heating Capacity (BTU/h)

(15.6) (18.3) (21.1) (23.9) (26.7)

1.48 1.55 1.62 1.69 1.76

1.50 1.58 1.65 1.72 1.79

1.56 1.64 1.72 1.80 1.87

1.62 1.70 1.79 1.87 1.96

1.68 1.78 1.87 1.96 2.05

1.76 1.85 1.96 2.06 2.15

1.83 1.94 2.05 2.16 2.26

1.91 2.03 2.14 2.26 2.37

2.00 2.12 2.24 2.37 2.49

2.09 2.22 2.35 2.48 2.61

2.19 2.33 2.47 2.61 2.62

2.44 2.59 2.59 2.62 2.62

2.41 2.56 2.62 2.62 2.62

2.54 2.62 2.62 2.62 2.62

2.59 2.62 2.62 2.62 2.62

NOTE

Rating conditions (#)

: Indoor Unit Entering Air Temp. 70 °F (21.1 °C) DB : Outdoor Ambient Temp. 47 °F (8.3 °C) DB / 43 °F (6.1 °C) WB

3. Above data represents the value when the operation frequency of a compressor is fixed.

5-5. Air Throw Distance Charts

0 5 10 15 20 25 30

Indoor Unit CS-KE18NKU

Cooling

Room air temp.:80°F (26.7°C)

Fan speed:High

Axis air velocity (ft./sec.)

Vertical distance (ft.)

Horizontal distance (ft.)

: Flap angle 0 , : Axis air velocity 0 : Flap angle 30 , : Axis air velocity 30

Heating

Room air temp.:70°F (21.1°C) Fan speed:High

Axis air velocity (ft./sec.)

Vertical distance (ft.)

Horizontal distance (ft.)

: Flap angle 45 , : Axis air velocity 45 : Flap angle 60 , : Axis air velocity 60

+ 86 hidden pages

Panasonic CS-KE18NKU, CS-KE24NKU Service Manual

TECHNICAL & SERVICE MANUAL

SAFETY PRECAUTIONS

Table of Contents

1. OPERATING RANGE

2. SPECIFICATIONS

2-1. Unit Specifications

2-2. Major Component Specifications

2-3. Other Component Specifications

3. DIMENSIONAL DATA

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

5. PERFORMANCE DATA

5-1. Temperature Charts

5-2. Cooling Capacity

5-3. Cooling Capacity (Low Ambient)

5-4. Heating Capacity

5-5. Air Throw Distance Charts