Panasonic CS-KE18NB4UW, CS-MKE12NB4U, CS-MKE9NB4U, CU-4KE31NBU, CU-4KE24NBU User Manual

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CU-3KE19NBU (3-room multi unit)

CU-4KE24NBU (4-room multi unit)

CU-4KE31NBU (4-room multi unit)

< Applicable Multi-Outdoor Units >

INDOOR UNIT :

CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

CS-KE18NB4UW & CZ-18BT1U

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

Semi-Concealed Type Indoor Unit

1 852 361 10 (1 852 361 15)

1 852 361 11 (1 852 361 15)

1 852 361 07 (1 852 361 15)

9,000BTU / h

11,900BTU / h

17,500BTU / h

CS-MKE9NB4U (CZ-18BT1U)

CS-MKE12NB4U (CZ-18BT1U)

CS-KE18NB4UW (CZ-18BT1U)

Product Code No.

Body (Panel)

Capacity

Indoor Model No.

Body (Panel)

TECHNICAL & SERVICE MANUAL

REFERENCE NO. SM700882

CS-MKE9NB4U (Body) & CZ-18BT1U (Panel)

CS-MKE12NB4U (Body) & CZ-18BT1U (Panel)

CS-KE18NB4UW (Body) & CZ-18BT1U (Panel)

Remote Controller

Wired Remote Controller

(Option)

Body

Panel

• 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.

SAFETY PRECAUTIONS

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.

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.

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.

Prohibit

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

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.

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.

Prohibit

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SAFETY PRECAUTIONS

TABLE OF CONTENTS

APPLICABLE MULTI-OUTDOOR UNITS

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. ELECTRICAL DATA

5-1. Electric Wiring Diagrams

6. MAINTENANCE

6-1. Disassembly Procedure

7. FUNCTIONS

7-1. Operation Functions

7-2. Protective Functions

8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)

8-1. Precautions before Performing Inspection or Repair

8-2. Method of Self-Diagnostics

8-3. Checking the Indoor and Outdoor Units

8-4. Trouble Diagnosis of Fan Motor

8-5. Noise Malfunction and Electromagnetic Interference

APPENDIX A Operating Instructions

(CS-MKE9NB4U & CZ-18BT1U, CS-MKE12NB4U & CZ-18BT1U)

APPENDIX B Operating Instructions

(CS-KE18NB4UW & CZ-18BT1U)

APPENDIX C INSTALLATION INSTRUCTIONS

CS-MKE9NB4U & CZ-18BT1U, CS-MKE12NB4U & CZ-18BT1U,

CS-KE18NB4UW & CZ-18BT1U

A-1

A-2

A-3

Page

()

...........................................................................................

............................................................................

APPENDIX D Operating Instructions

(CZ-RD515U)

APPENDIX E INSTALLATION INSTRUCTIONS

(CZ-RD515U)

A-4

A-5

Page

APPLICABLE MULTI-OUTDOOR UNITS

CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

CS-KE18NB4UW & CZ-18BT1U

3-Room

CU-3KE19NBU

YES

4-Room

CU-4KE24NBU

YES

4-Room

CU-4KE31NBU

YES

Indoor Unit

Multi-Outdoor Unit

95 °F DB / 71 °F WB

67 °F DB / 57 °F WB

80 °F DB / 67 °F WB

– DB / – WB

1. OPERATING RANGE

Maximum

Minimum

Maximum

Minimum

115 °F DB

14 °F DB

75 °F DB / 65 °F WB

– DB / 0 °F WB

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Heating

2. SPECIFICATIONS

2-1. Unit Specifications

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

2-1-1.

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

0.1

9,000

2.65

Cooling

230V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

3/8 (9.52)

Flare Type

33 / 32 / 31 34 / 33 / 32

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Performance

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<230V>

Type

221 (376) / 206 (350) / 194 (330)

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

3.4

12,300

3.6

Heating

247 (420) / 235 (399) / 224 (381)

Moisture Removal (High) Pints/h

0.12

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

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

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-MKE9NB4U)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-MKE9NB4U & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

Cooling

208V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

3/8 (9.52)

Flare Type

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<208V>

Type

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

Heating

Moisture Removal (High) Pints/h

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

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

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-MKE9NB4U)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-MKE9NB4U & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

0.11

9,000

2.65

33 / 32 / 31 34 / 33 / 32

221 (376) / 206 (350) / 194 (330)

3.4

12,300

3.6

247 (420) / 235 (399) / 224 (381)

0.13

Performance

2-1-2. Indoor Unit CS-MKE12NB4U & CZ-18BT1U

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

Cooling

230V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

3/8 (9.52)

Flare Type

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<230V>

Type

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

Heating

Moisture Removal (High) Pints/h

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-MKE12NB4U)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-MKE12NB4U & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

0.11

11,900

3.5

34 / 32 / 31 35 / 34 / 32

235 (399) / 206 (350) / 194 (330)

4.26

13,600

4.0

268 (455) / 247 (420) / 224 (381)

0.13

Performance

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-MKE12NB4U & CZ-18BT1U

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

Cooling

208V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

3/8 (9.52)

Flare Type

34 / 32 / 31 35 / 34 / 32

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<208V>

Type

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

Heating

Moisture Removal (High) Pints/h

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-MKE12NB4U)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-MKE12NB4U & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

0.12

11,900

3.5

235 (399) / 206 (350) / 194 (330)

4.26

13,600

4.0

268 (455) / 247 (420) / 224 (381)

0.14

Performance

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

2-1-3. Indoor Unit CS-KE18NB4UW & CZ-18BT1U

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

0.15

17,500

5.15

Cooling

230V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

1/2 (12.7)

Flare Type

44 / 40 / 36 44 / 40 / 36

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<230V>

Type

341 (579) / 294 (500) / 253 (430)

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

4.89

20,400

6.0

Heating

383 (651) / 324 (551) / 265 (450)

Moisture Removal (High) Pints/h

0.19

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

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

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-KE18NB4UW)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-KE18NB4UW & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

Performance

Indoor Unit CS-KE18NB4UW & CZ-18BT1U

Vertical

dB-AIndoor : Hi/Me/Lo

Air Filter

Refrigerant

0.16

17,500

5.15

Cooling

208V Single-Phase 60Hz

187 to 253

Refrigerant Tubing Connections

Operation Sound

Electrical Rating

WPower Input

Available Voltage Range

Running Amperes

Narrow tube

Wide tube

Refrigerant inch (mm)

Tube Diameter inch (mm)

1/4 (6.35)

1/2 (12.7)

Flare Type

44 / 40 / 36 44 / 40 / 36

R410A

Washable, Anti-Mold

Auto

Timer

IndoorFan Speeds

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

Auto and 3 steps

Airflow Direction (Indoor) Horizontal

Controls / Temperature Control

Control Unit

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

Features

BTU/h

Voltage Rating

Total Capacity

Semi-Concealed Type Indoor Unit

<208V>

Type

341 (579) / 294 (500) / 253 (430)

Air Circulation (Hi/Me/Lo) ft

/min (m

/h)

4.89

20,400

6.0

Heating

383 (651) / 324 (551) / 265 (450)

Moisture Removal (High) Pints/h

0.2

Wired Remote Controller (Option) CZ-RD515U

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

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

Shipping Volume

Net

Shipping

Weight Ib. (kg)

Ib. (kg)

cu.ft (m

)

inch (mm)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width

Depth

22-5/8 (575)

35.3 (16)

Individual Unit

Body

(CS-KE18NB4UW)

Panel

(CZ-18BT1U)

Indoor Unit

(CS-KE18NB4UW & CZ-18BT1U)

inch (mm) (313)12-5/16

(625)24-19/32

(18.7)41.3

11-5/32 (283)

inch (mm) 22-5/8 (575)

inch (mm)

Package Dimensions Height

Width

Depth 28-1/8 (714)

inch (mm) -

11-13/32 (290)

inch (mm) 24-13/16 (630)

41.9 (19)

4.59 (0.13)

24-19/32 (625)

6.0 (2.7)

1-9/16 (40)

24-19/32 (625)

26-11/16 (678)

4-1/8 (105)

26-3/16 (665)

7.7 (3.5)

1.65 (0.04)

Performance

Indoor Unit (Body) CS-MKE9NB4U

Indoor Unit (Panel) CZ-18BT1U

2-2. Major Component Specifications

2-2-1. Indoor Unit

MP24ZN-12V ... 2

Flap Motor

Type Stepping Motor

Rating

Model ... Q'ty

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DC 12V

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

10.8

333 +/- 10%Coil Resistance

Model ... Q'ty

Rating Voltage, Hz

Input

Drain Pump

Ohm

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Thermal Fuse

293 (145)

(Ambient Temp. 68 °F (20 °C))

Safety Device

Open

Type

°F (°C)

Aluminum Plate Fin / Copper Tube

18.1

2.94 (0.273) Face Area

Coil

Rows

Fins per inch

Heat Exchanger Coil

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Yes

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 3A

CB-CS-MKE9NB4U

1 ... D12-5/8 / L5-3/4 (D322/L147)

Turbo

DC Motor

SIC-62FW-D866-2 ... 1

DC280V / 23W

440 / 490

Internal Controller

Yes

Fan

Q'ty ... Dia. and Length

Type

inch (mm)

Fan Motor

Rating Voltage / Nominal Output

Coil Resistance

Rough Measure RPM (Cool / Heat)

Type

Model ... Q'ty

No. of Poles

Safety Device

Type

Over- Current Protection

Over- Heat Protection

(Ambient Temp. 68 °F (20 °C))

Run Capacitor Micro F

VAC

Ohm

Indoor Unit (Body) CS-MKE12NB4U

Indoor Unit (Panel) CZ-18BT1U

MP24ZN-12V ... 2

Flap Motor

Type Stepping Motor

Rating

Model ... Q'ty

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DC 12V

Aluminum Plate Fin / Copper Tube

18.1

2.94 (0.273) Face Area

Coil

Rows

Fins per inch

Heat Exchanger Coil

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 3A

CB-CS-MKE12NB4U

1 ... D12-5/8 / L5-3/4 (D322/L147)

Turbo

DC Motor

SIC-62FW-D866-2 ... 1

470 / 520

Thermal Fuse

Fan

Q'ty ... Dia. and Length

Type

inch (mm)

Fan Motor

Coil Resistance

Rough Measure RPM (Cool / Heat)

Type

Model ... Q'ty

No. of Poles

Safety Device

Type

(Ambient Temp. 68 °F (20 °C))

Run Capacitor Micro F

VAC

Ohm

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

10.8

333 +/- 10%Coil Resistance

Model ... Q'ty

Rating Voltage, Hz

Input

Drain Pump

Ohm

Thermal Fuse

293 (145)

(Ambient Temp. 68 °F (20 °C))

Safety Device

Open

Type

°F (°C)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Yes

Over- Current Protection

Over- Heat Protection

DC280V / 23WRating Voltage / Nominal Output

Indoor Unit (Body) CS-KE18NB4UW

Indoor Unit (Panel) CZ-18BT1U

MP24ZN-12V ... 2

Flap Motor

Type Stepping Motor

Rating

Model ... Q'ty

Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DC 12V

Aluminum Plate Fin / Copper Tube

18.1

2.94 (0.273) Face Area

Coil

Rows

Fins per inch

Heat Exchanger Coil

)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Control PCB

Control Circuit Fuse

Controls

Part No.

Microprocessor

250V 3A

CB-CS-KE18NB4U

1 ... D12-5/8 / L5-3/4 (D322/L147)

Turbo

DC Motor

SIC-62FW-D866-2 ... 1

650 / 720

Internal Controller

Fan

Q'ty ... Dia. and Length

Type

inch (mm)

Fan Motor

Coil Resistance

Rough Measure RPM (Cool / Heat)

Type

Model ... Q'ty

No. of Poles

Safety Device

Type

(Ambient Temp. 68 °F (20 °C))

Run Capacitor Micro F

VAC

Ohm

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

10.8

333 +/- 10%Coil Resistance

Model ... Q'ty

Rating Voltage, Hz

Input

Drain Pump

Ohm

Thermal Fuse

293 (145)

(Ambient Temp. 68 °F (20 °C))

Safety Device

Open

Type

°F (°C)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Yes

Over- Current Protection

Over- Heat Protection

DC340V / 20WRating Voltage / Nominal Output

2-3. Other Component Specifications

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

CS-KE18NB4UW & CZ-18BT1U

32 50 68 86 104 122 140 158 176 194

(0) (10) (20) (30) (40) (50) (60) (70)(80) (90)

100

120

140

160

180

200

59 68 77 86 95 104

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

• Indoor air temp sensor

(Model:KTEC-35-S98)

• Indoor heat exchanger sensor

(Model:PT2M-51H-S3)

Resistance (k ohm)

Temperature °F (°C)

3. DIMENSIONAL DATA

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

CS-KE18NB4UW & CZ-18BT1U

6-5/16 6-11/16

1-3/16 (30)

4-19/32

1-25/32

2-3/32

8-15/32

22-5/8 (575)

11-5/32 (283)

Less than 31/32Less than 31/32

3-5/8

22-5/8 (575)

12-7/8

Suspension bolt pitch

21-1/32 (534)

21-1/32

(534)

12-7/16

23-5/8 (600)

Ceiling opening dimensions

23-5/8 (600)

Ceiling opening dimensions

Center of

panel

24-19/32 (625)

13-5/32 (334)

14-3/32 (358)

7-11/16

4-29/32

A View

1-3/16

21/32

3-1/8

The length of the suspension

bolts should be selected so that

there is a gap of 1-3/16" or

the ceiling (21/32" or more

below the lower surface of the

main unit), as shown in the

figure at right. If the suspension

bolts is too long, it will contact

the ceiling panel and the unit

cannot be installed.

Air intake

Discharge outlet

Refrigerant tubing

(liquid tube)

dia.

1/4" (flared)

Refrigerant tubing

(gas tube)

dia. 1/2"

(flared)

Drain tube connection port VP20 (outer dia. 1")

Power supply port

Suspension bolt hole (4 - 1/2" x 1-1/8" hole)

Fresh air intake duct connection port (dia. 3-7/8")

7-23/32

1-27/32 1-3/32

2-3/32

2-3/4 1-9/32

5-9/16

25/32

Unit : inch (mm)

O.D. 3/8" (9.52 mm)

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

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

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

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

Indoor Unit CS-KE18NB4UW & CZ-18BT1U

Cooling cycle

Heating cycle

Indoor unit

Cooling cycle

Heating cycle

Indoor unit

Heat exchanger

Strainer

Heat exchanger

Strainer

5. ELECTRICAL DATA

5-1. Electric Wiring Diagrams

Indoor Unit CS-MKE9NB4U & CZ-18BT1U

CS-MKE12NB4U & CZ-18BT1U

CS-KE18NB4UW & CZ-18BT1U

8FA2-5250-46900-2

1 2 3 4 5 6

FAN MOTOR

DRAIN PUMP

DCM

6P (BLU)

6P (WHT)

3P (BLU)

3P (RED)

PWM/POW 7P (RED) PWM/POW 7P (RED) RC

4P (WHT)

IND

7P (WHT)

3P (RED)

FLAP

5P (WHT)

ROOM

2P (YEL)

COIL-1

2P (RED)

IND LAMP ASSY

FLAP (W)

FLOAT SWITCH

BOX BOX

SERIAL

2P (WHT)

SERIAL

2P (WHT)

TERMINAL BASE

CONTROLLER CONTROLLER

TO OUTDOOR UNIT

GND

FERRITE

CORE

AC1 AC2 SI

RED

YEL

BLU

YEL/(RED)

1 1

2 2

1 1

2 2

YEL/(RED)

BRN

RED

ORG

YEL

PNK

BLU

VLT

2 3

RED

BLK

WHT

GRN/YEL

RED

WHT

GRN

WHT

BLK

GRN

BRN

RED

ORG

YEL

PNK

BLU

VLT

BLK

FLAP (R)

THERMISTOR

ROOM

COIL-1

BLK

ORG

BLU

BRN

WHT

BLK

ORG

BLU

BRN

WHT

BLK

6. MAINTENANCE

6-1. Disassembly Procedure

6-1-1. Remove the air intake grill.

(1) Slide the 2 latches each to the corresponding arrow direction. (Fig. 1 and Fig. 2)

Open downward the air intake grill located on the latch side.

(2) Undo the air intake grill drop preventive hook. (Fig. 3)

Undo the 2 hinges for the grill and remove the air intake grill.

6-1-2. Disconnect the connectors in the control box.

(1) Remove the 2 screws and remove the control box cover. (Fig. 4)

(2) Disconnect the connectors CN04 (FLAP 5P), CN12 (RC 4P) and CN13 (IND 7P). (Fig. 5)

Latch

Hook

Hinge

Air intake grill

Screw Control box cover

CN13

CN04

CN12

Fig.1

Fig.4 Fig.5

Fig.2 Fig.3

Hinge

Control PCboard

To avoid electrical shock hazard, be sure to disconnect power before

attempting to disassemble the unit.

When a footstool, etc. is used for disassembling the indoor unit,

be careful not to fall down. If you fall down, you might be injured seriously.

Warning

NOTE

6-1-3. Remove the ceiling panel.

(1) Open the clamp (4 locations) and remove the 2 lead wires from the clamps. (Fig. 6)

(2) Remove the 4 screws fixing the corner cover (at 3 locations) and indicator cover (at 1 location). (Fig. 6)

(3) Press the center 1 of the cover and remove the cover with the section 2 pulled down. (Fig. 7)

(4) Remove the strap (3 locations) from the hook on the ceiling panel. (Fig. 8)

There is no strap on the indicator cover.

(5) Remove the bolt (4 locations) with a washer and remove the ceiling panel. (Fig. 9)

Screw

Bolt

Screw

Indicator

cover

Corner cover

Corner coverCorner cover

Clamp

Pull down

section 2.

Lead wire

Cover

Center 1

Fig.6 Fig.7

Fig.8 Fig.9

Remove the strap

from the hook.

Strap

6-1-4. Remove the indoor air temperature sensor.

(1) Disconnect the connector CN08 (ROOM 2P) in the control box and remove the indoor air temperature

sensor. (Fig. 10)

6-1-5. Remove the power box and control box.

(1) Remove a screw and remove the terminal cover. (Fig. 11)

(2) Remove the 2 screws and remove the power box cover. (Fig. 11)

(3) Disconnect the power lines (No. 1 and No. 2) / signal line (No. 3) and ground cable from the terminals in

the power box. (Fig. 12)

Indoor air temperature sensor

CN08

Terminal

Fig.10

Fig.11

Fig.12

Ground cable

Terminal cover

Screw

Power box cover

Power lines / Signal line

12 3

(4) Disconnect the connector CN07 (DP 2P) in the power box. (Fig. 13)

Remove a screw and disconnect the ground cable. (Fig. 13)

(5) Disconnect the connector CN03 (DCM 6P) in the power box. (Fig. 14)

(6) Remove the 4 screws and remove the power box. (Fig. 14)

(7) Disconnect the connectors CN06 (FS 3P) and CN09 (COIL-1 2P) in the control box. (Fig. 15)

(8) Remove the 2 screws and remove the control box. (Fig. 15)

Fig.13

Fig.14

Fig.15

Screw

CN06

CN03

Screw

Ground cable

CN07

CN09

For the removal of the following components, perform any work after removing the indoor

unit (main body) from the ceiling.

Main body lower section Heat exchanger sensor Drain pump

Float switch Turbo fan Fan motor

Heat exchanger

1. Perform the work after draining the water to prevent the water leakage from the drain pan.

• Put a bucket, etc., under the drain cap and remove the drain cap to drain the water.

(Fig. 16)

2. Refer to the installation instructions for recovery of refrigerant or removal of the power

cable or tubing.

6-1-6. Remove the main body lower section.

(1) Remove the 4 screws. (Fig. 16)

(2) Remove the 2 screws. (Fig. 17)

(3) Disconnect the connector CN03 (DCM 6P) in the power box. (Fig. 18)

(4) Lift the main body lower section and remove it from the main body upper section.

Screw

Fig.16

Fig.18Fig.17

Drain cap

Main body lower sectionMain body lower section

Screw

Main body lower section

Main body

upper section

Screw

CN03

Screw

NOTE

6-1-7. Remove the heat exchanger sensor.

(1) Remove the heat exchanger sensor from the sensor holder. (Fig. 19)

6-1-8. Remove the drain pump and float switch.

(1) Remove the 2 screws (Fig. 20)

(2) Loosen the clamp and disconnect the drain hose from the drain pump. (Fig. 20)

(3) Remove the drain pump from the main body upper section. (Fig. 20)

(4) Remove a nut and remove the float switch. (Fig. 21)

Heat exchanger sensor

Fig.20 Fig.21

Fig.19

Holder

Drain pump

Screw

Clamp

Float switch

Nut

Drain hose

6-1-9. Remove the turbo fan and fan motor.

(1) Remove a nut and remove the turbo fan. (Fig. 22)

(2) Remove the 2 screws and 3 nuts, and remove the fan motor. (Fig. 23)

6-1-10. Remove the heat exchanger.

(1) Remove the 3 screws. (Fig. 24)

(2) Remove the 3 screws. (Fig. 25)

(3) Remove the heat exchanger from the main body upper section with the heat exchanger lifted.

Fig.22 Fig.23

Fig.24 Fig.25

Turbo fan

Nut

Screw Nut

Fan motor

Screw

ScrewHeat exchanger

Screw

Main body

upper section

Emergency operation SENSOR DRY

AUTO cooling/heating operation

Selecting the operation mode

During DRY operation, the system adjusts the room

temperature and fan speed according to the conditions in the

room, in order to maintain a comfortable room environment.

SENSOR DRY operation

• DRY operation is as shown in the figure below.

PAM- control

• In order to further improve inverter performance, control is

switched between PWM control at low operation speeds, and

PAM control at high operation speeds, making the most

effective use of power.

The compressor operation frequency varies.

The indoor fan operates with 1/f fluctuation.

The compressor operates at a low operating frequency.

The indoor fan operates with 1/f fluctuation.

• Monitoring operation takes place when the room temperature

is below 59°F

(15°C), or more than 5°F(3°C) below the set

temperature.

• When the monitoring range is entered, the compressor stops,

and the indoor fan operates with 1/f fluctuation.

DRY A

DRY B

Monitor

Conditions are monitored at all

times when the room temperature

is below 59°F(15°C).

Load

COOL zone

A zone

B zone

Emergency operation is available when the remote

controller malfunctions, has been lost, or otherwise

cannot be used.

• The set temperature is 4°F(2°C) below the detected room

temperature in the case of cooling operation, and 4°F(2°C)

above the room temperature in the case of heating

operation. The flap and fan speed settings are AUTO.

(GREEN) (RED) (Lamp Off)

COOL HEAT STOP

• When AUTO mode is selected, the microprocessor calculates

the difference between the set temperature and the room

temperature, and automatically switches to Cooling or

Heating mode.

• As shown by the example in the figure below, with AUTO

cooling/heating operation, the mode changes between

Heating and Cooling mode according to changes in the

relationship between the current room temperature and the

set temperature.

Room temp. Set temp. COOL

Room temp. Set temp. HEAT

Zone A

Zone B

Zone C

Zone B

Zone A

OFF OFF

Compressor

Operation mode

Room temp.

HeatingCooling Cooling

ON ON ON

More than

1 hour

Within

1 hour

Set temp.

Example

Example of operation in AUTO mode with the set room temperature

at 74°F(23°C).

To operate the system, press the OPERATION button,

which is also used as the receiver, below the unit display.

Each time this button is pressed, the OPERATION lamp

changes color to indicate the type of operation. Select the

desired type of operation.

7. FUNCTIONS

7-1. Operation Functions

HIGH POWER

NIGHT SETBACK

Lamp colors

Timer backup

This function acts to raise the power but keeps the AC system in

the same operating mode.

This function is set with the HIGH POWER button on the remote

controller.

(It can be set regardless of the temperature and fan speed

settings.)

HIGH POWER operation from remote controller

The unit operates at maximum output for 30 minutes,

regardless of the desired temperature.

The fan speed is 1 step above "High."

OPERATION lamp

When HIGH POWER operation ends, the unit operates at low

Hz for 5 minutes, regardless of the thermostat OFF conditions.

When in DRY mode, operation is in the cooling zone.

Operation stops if there are no operator controls for 25 hours or

longer after unit operation switched from OFF to ON by use of

ON timer operation.

Frequency

MAX

Start End

Time

30 min. 5 min.

Setting

temperature

Press the NIGHT

SETBACK button

When NIGHT SETBACK operation is set, the temperature and

fan speed settings will be adjusted automatically to allow

comfortable sleep.

When NIGHT SETBACK operation is set, " mark" appears on

the remote controller. The main unit display lamp also becomes

dimmer.

COOL and DRY modes

When the night setback mode is selected, the air conditioner

automatically raises the temperature setting 2°F(1°C) when 30

minutes have passed after the selection was made, and then

another 2°F(1°C) after another 30 minutes have passed,

regardless of the indoor temperature when night setback was

selected. This enables you to save energy without sacrificing

comfort. This function is convenient when gentle cooling is

needed.

HEAT mode

When the night setback mode is selected, the air conditioner

automatically lowers the temperature setting 4°F(2°C) when 30

minutes have passed after the selection was made, and then

another 4°F(2°C) after another 30 minutes have passed,

regardless of the indoor temperature when night setback was

selected. This enables you to save energy without sacrificing

comfort. This function is convenient when gentle heating is

needed.

OPERATION lamp Green

TIMER lamp Green

HIGH POWER lamp Green

HEAT operation Red

DRY operation Orange

COOL operation Green

FAN operation Green

DEFROSTING operation Red and Orange

alternately

NOTE

30 min. 30 min.

Time

2°F(1°C)

Setting

temperature

Press the NIGHT

SETBACK button

30 min. 30 min.

Time

4°F(2°C)

2°F(1°C)

Overload prevention during heating

During HEAT operation, the temperature of the indoor heat

exchanger is used to control the frequency and lessen the load

on the compressor before the protective device is activated.

Cold-air prevention during heating

During heating, the fan speed is set to "LL" (very low) or stopped.

As the temperature of the indoor heat exchanger rises, the fan

speed is changed to the set speed.

Freeze prevention

During COOL or DRY operation, freezing is detected and

operation is stopped when the temperature of the indoor heat

exchanger matches the conditions below.

Freeze-prevention operation is engaged when the

temperature of the indoor heat exchanger is below 43°F(6°C).

Restart after freeze-prevention operation occurs when the

temperature of the indoor heat exchanger reaches 46°F(8°C)

or above.

Area: Automatic capacity control

When Point A has been exceeded, the operation frequency is

reduced by a certain proportion.

Area: Frequency increase is prohibited.

At Point B and below, overload prevention is ended and

control is the same as in the

area.

Area: Automatic capacity control

When the temperature drops below Point A, the operation

frequency is reduced by a certain proportion.

Area: Frequency increase is prohibited.

When the temperature reaches Point C or above, freezing

prevention is ended and control is the same as in the

area.

* When the temperature drops to below 36°F(2°C)

(continuously for 2 minutes or longer), the compressor stops.

Once the freeze condition is detected, the air conditioner will

work less than the maximum frequency until it is turned off.

Approx.

127

(53)

At stability of operation

TO1

TO2

TO3

The fan speed is increased depending

on the outside air temperature. (*1)

At start of operation

H +

Stopped

Indoor heat exchanger

A. Control start

B. Control end

Fan speed [rpm] Outdoor air temp.

(25)

(30)

TC1 100

(38)

abc d

abcd

Indoor heat exchanger

temperature °F(°C)

Indoor heat exchanger

temperature °F(°C)

Indoor heat exchanger

temperature °F(°C)

Approx.

117

(47)

(2)

(6)

(8)

• The fan speed is forcibly changed to "LL" beginning 30 seconds

after the thermostat turns OFF.

• At stability of operation refers to operation when the room

temperature has approached the set temperature.

• When HEAT operation starts, the indoor fan is stopped until the

temperature of the indoor heat exchanger reaches 68°F(20°C)

or higher, or until the room temperature reaches 59°F(15°C) or

higher.

*1 It is applied only to CS-MKE9NB4U and CS-MKE12NB4U.

This function is enabled when the automatic operation is being

performed and the "Automatic Fan Speed" has been selected.

The fan speed might be increased during the automatic

operation. However, it is not the abnormal condition.

TC1 : CS-KE18NB4UW 104°F (40°C)

CS-MKE9NB4U, CS-MKE12NB4U 91°F (33°C)

TO1 : 35.6°F (2°C) or less

TO2 : 35.6°F (2°C) to 53.6°F (12°C)

TO3 : 53.6°F (12°C) or more

NOTE

7-2. Protective Functions

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