Panasonic R410A User Manual

TECHNICAL & SERVICE MANUAL

INDOOR UNIT :

CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U& CZ-18BT1U CS-KS18NB4UW& CZ-18BT1U

DC INVERTER MULTI-SYSTEM AIR CONDITIONER

Capacity

9,000BTU / h

11,900BTU / h

17,500BTU / h

Indoor Model No.

Body (Panel)

CS-MKS9NB4U (CZ-18BT1U)

CS-MKS12NB4U (CZ-18BT1U)

CS-KS18NB4UW (CZ-18BT1U)

Semi-Concealed Type Indoor Unit

Product Code No.

Body (Panel)

1 852 361 08 (1 852 361 15)

1 852 361 09 (1 852 361 15)

1 852 361 06 (1 852 361 15)

Body

Panel

CS-MKS9NB4U (Body) & CZ-18BT1U (Panel) CS-MKS12NB4U (Body) & CZ-18BT1U(Panel) CS-KS18NB4UW (Body) & CZ-18BT1U(Panel)

< Applicable Multi-Outdoor Units >

CU-3KS19NBU (3-room multi unit) CU-4KS24NBU (4-room multi unit) CU-4KS31NBU (4-room multi unit)

Remote Controller

Wired Remote Controller

(Option)

REFERENCE NO. SM700881

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

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

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8 14 17

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-MKS9NB4U & CZ-18BT1U , CS-MKS12NB4U & CZ-18BT1U

APPENDIX B Operating Instructions (CS-KS18NB4UW & CZ-18BT1U)

APPENDIX C INSTALLATION INSTRUCTIONS CS-MKS9NB4U & CZ-18BT1U , CS-MKS12NB4U & CZ-18BT1U , CS-KS18NB4UW & CZ-18BT1U

()

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28 30

31 31 33 37 38

A-1

A-2

A-3

Page

APPENDIX D Operating Instructions

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

(CZ-RD515U)

APPENDIX E INSTALLATION INSTRUCTIONS (CZ-RD515U)

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

A-4

A-5

APPLICABLE MULTI-OUTDOOR UNITS

Multi-Outdoor Unit

Indoor Unit

CS-MKS9NB4U & CZ-18BT1U

CS-MKS12NB4U & CZ-18BT1U

CS-KS18NB4UW & CZ-18BT1U

3-Room

CU-3KS19NBU

YES

4-Room

CU-4KS24NBU

YES

4-Room

CU-4KS31NBU

YES

1. OPERATING RANGE

Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.

Cooling

Maximum

Minimum

95 °F DB / 71 °F WB

67 °F DB / 57 °F WB

115 °F DB

14 °F DB

2. SPECIFICATIONS

2-1. Unit Specifications

2-1-1.

Type

Voltage Rating

Performance

Electrical Rating

Features

Indoor Unit CS-MKS9NB4U & CZ-18BT1U

Semi-Concealed Type Indoor Unit

230V Single-Phase 60Hz

Total Capacity

Air Circulation (Hi/Me/Lo) ft Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

Controls / Temperature Control Control Unit Timer

Airflow Direction (Indoor) Horizontal

Air Filter Refrigerant Operation Sound Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm) Wired Remote Controller (Option) CZ-RD515U

Narrow tube Wide tube

BTU/h

/min (m3/h)

IndoorFan Speeds

Vertical

dB-AIndoor : Hi/Me/Lo

WPower Input

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

V A

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

33 / 32 / 31

Flare Type

<230V>

Cooling

9,000

2.65

3.4

187 to 253

0.1 16

Auto

R410A

1/4 (6.35) 3/8 (9.52)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Remarks: Rating conditions are:

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

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

Net Shipping

Indoor Unit

(CS-MKS9NB4U & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

(CS-MKS9NB4U)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-MKS9NB4U & CZ-18BT1U

Type

Voltage Rating

Total Capacity

BTU/h

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

Performance

Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

V A

WPower Input

Electrical Rating

Controls / Temperature Control Control Unit Timer

IndoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Refrigerant

Features

Operation Sound

dB-AIndoor : Hi/Me/Lo Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Wired Remote Controller (Option) CZ-RD515U

Semi-Concealed Type Indoor Unit

208V Single-Phase 60Hz

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

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

<208V>

Cooling

9,000

2.65

3.4

187 to 253

0.11 15

Auto

R410A

33 / 32 / 31

Flare Type

1/4 (6.35) 3/8 (9.52)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Net Shipping

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

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

Indoor Unit

(CS-MKS9NB4U & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

(CS-MKS9NB4U)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Panel

(CZ-18BTCS)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-MKS12NB4U & CZ-18BT1U

Type

Voltage Rating

Total Capacity

BTU/h

Air Circulation (Hi/Me/Lo) ft

Performance

Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

/min (m3/h)

V A

WPower Input

Electrical Rating

Controls / Temperature Control Control Unit Timer

IndoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Refrigerant

Features

Operation Sound

dB-AIndoor : Hi/Me/Lo Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Wired Remote Controller (Option) CZ-RD515U

Semi-Concealed Type Indoor Unit

230V Single-Phase 60Hz

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

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

<230V>

Cooling

11,900

3.5

4.26

187 to 253

0.11 17

Auto

R410A

34 / 32 / 31

Flare Type

1/4 (6.35) 3/8 (9.52)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Net Shipping

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

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

Indoor Unit

(CS-MKS12NB4U & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

(CS-MKS12NB4U)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-MKS12NB4U & CZ-18BT1U

Type

Voltage Rating

Total Capacity

BTU/h

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

Performance

Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

V A

WPower Input

Electrical Rating

Controls / Temperature Control Control Unit Timer

IndoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Refrigerant

Features

Operation Sound

dB-AIndoor : Hi/Me/Lo Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Wired Remote Controller (Option) CZ-RD515U

Semi-Concealed Type Indoor Unit

208V Single-Phase 60Hz

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

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

<208V>

Cooling

11,900

3.5

4.26

187 to 253

0.12 16

Auto

R410A

34 / 32 / 31

Flare Type

1/4 (6.35) 3/8 (9.52)

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Net Shipping

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

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

Indoor Unit

(CS-MKS12NB4U & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

(CS-MKS12NB4U)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-KS18NB4UW & CZ-18BT1U

Type

Voltage Rating

Total Capacity

BTU/h

Air Circulation (Hi/Me/Lo) ft

Performance

Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

/min (m3/h)

V A

WPower Input

Electrical Rating

Controls / Temperature Control Control Unit Timer

IndoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Refrigerant

Features

Operation Sound

dB-AIndoor : Hi/Me/Lo Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Wired Remote Controller (Option) CZ-RD515U

Semi-Concealed Type Indoor Unit

230V Single-Phase 60Hz

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

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

<230V>

Cooling

17,500

5.15

4.89

187 to 253

0.15 22

Auto

R410A

44 / 40 / 36

Flare Type

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

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Net Shipping

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

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

Indoor Unit

(CS-KS18NB4UW & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

(CS-KS18NB4UW)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

Indoor Unit CS-KS18NB4UW & CZ-18BT1U

Type

Voltage Rating

Total Capacity

BTU/h

Air Circulation (Hi/Me/Lo) ft

Performance

Moisture Removal (High) Pints/h Available Voltage Range Running Amperes

/min (m3/h)

V A

WPower Input

Electrical Rating

Controls / Temperature Control Control Unit Timer

IndoorFan Speeds

Airflow Direction (Indoor) Horizontal

Vertical Air Filter Refrigerant

Features

Operation Sound

dB-AIndoor : Hi/Me/Lo Refrigerant Tubing Connections Refrigerant inch (mm) Tube Diameter inch (mm)

Narrow tube Wide tube

Wired Remote Controller (Option) CZ-RD515U

Semi-Concealed Type Indoor Unit

208V Single-Phase 60Hz

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

Microprocessor / I.C. Thermister

Wireless Remote Control Unit

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

Auto and 3 steps

Washable, Anti-Mold

<208V>

Cooling

17,500

5.15

4.89

187 to 253

0.16 22

Auto

R410A

44 / 40 / 36

Flare Type

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

Dimensions & Weight (Indoor Unit)

Unit Dimensions Height

Width Depth

Package Dimensions Height

Width Depth 28-1/8 (714)

Weight Ib. (kg)

Shipping Volume

Net Shipping

Remarks: Rating conditions are:

Cooling: Indoor air temperature

Outdoor air temperature

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

Indoor Unit

(CS-KS18NB4UW & CZ-18BT1U)

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

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

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

Ib. (kg)

cu.ft (m

)

(625)24-19/32 (625)24-19/32

(18.7)41.3

(CS-KS18NB4UW)

11-5/32 (283)

11-13/32 (290)

Individual Unit

Body

22-5/8 (575)

35.3 (16)

41.9 (19)

4.59 (0.13)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Panel

(CZ-18BT1U)

1-9/16 (40)

24-19/32 (625) 24-19/32 (625)

4-1/8 (105)

26-3/16 (665)

26-11/16 (678)

6.0 (2.7)

7.7 (3.5)

1.65 (0.04)

2-2. Major Component Specifications

2-2-1. Indoor Unit

Indoor Unit (Body) CS-MKS9NB4U

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)

Rating Voltage / 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-MKS9NB4U

Microprocessor

250V 3A

Turbo

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

DC Motor

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

440

DC280V / 23W

Internal Controller

Yes Yes

Drain Pump

Model ... Q'ty Rating Voltage, Hz

(Ambient Temp. 68 °F (20 °C)) Safety Device

Heat Exchanger Coil

Coil

Rows Fins per inch

Input

Type Open

Ohm

°F (°C)

(m2)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

Aluminum Plate Fin / Copper Tube

Indoor Unit (Panel) CZ-18BT1U

Flap Motor

Type Stepping Motor

Model ... Q'ty

Rating Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

MP24ZN-12V ... 2

10.8

333 +/- 10%Coil Resistance

Thermal Fuse

293 (145)

18.1

2.94 (0.273) Face Area

DC 12V

Indoor Unit (Body) CS-MKS12NB4U

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)

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-MKS12NB4U

Microprocessor

250V 3A

Turbo

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

DC Motor

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

470

DC280V / 23WRating Voltage / Nominal Output

Thermal Fuse

Yes Yes

Drain Pump

Model ... Q'ty Rating Voltage, Hz

Input

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

Ohm

(Ambient Temp. 68 °F (20 °C)) Safety Device

Type Open

°F (°C)

Heat Exchanger Coil

Coil

Aluminum Plate Fin / Copper Tube Rows Fins per inch

(m2)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Indoor Unit (Panel) CZ-18BT1U

Flap Motor

Type Stepping Motor

Model ... Q'ty

Rating Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

MP24ZN-12V ... 2

10.8

333 +/- 10%Coil Resistance

Thermal Fuse

293 (145)

18.1

2.94 (0.273) Face Area

DC 12V

Indoor Unit (Body) CS-KS18NB4UW

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)

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-KS18NB4U

Microprocessor

250V 3A

Turbo

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

DC Motor

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

650

DC340V / 20WRating Voltage / Nominal Output

Internal Controller

Yes Yes

Drain Pump

Model ... Q'ty Rating Voltage, Hz

Input

PLD-12230ST-1 ... 1

AC208 to 240V, 60Hz

Ohm

(Ambient Temp. 68 °F (20 °C)) Safety Device

Type Open

°F (°C)

Heat Exchanger Coil

Coil

Aluminum Plate Fin / Copper Tube Rows Fins per inch

(m2)

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

Indoor Unit (Panel) CZ-18BT1U

Flap Motor

Type Stepping Motor

Model ... Q'ty

Rating Coil Resistance Ohm

(Ambient Temp. 77 °F (25 °C))

Each Pair of Terminal : 380 +/- 7%

DATA SUBJECT TO CHANGE WITHOUT NOTICE.

MP24ZN-12V ... 2

10.8

333 +/- 10%Coil Resistance

Thermal Fuse

293 (145)

18.1

2.94 (0.273) Face Area

DC 12V

2-3. Other Component Specifications

Indoor Unit CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U

• Indoor air temp sensor

(Model:KTEC-35-S98)

Resistance (k ohm)

59 68 77 86 95 104

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

Temperature °F (°C)

• Indoor heat exchanger sensor

(Model:PT2M-51H-S3)

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)

3. DIMENSIONAL DATA

Indoor Unit CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U

7-11/16

4-29/32

A View

1-3/16

21/32

3-1/8

(534)

21-1/32

23-5/8 (600)

Suspension bolt pitch

Ceiling opening dimensions

Center of

panel

(flared)

1/4" (flared)

dia.

dia. 1/2"

23-5/8 (600)

21-1/32 (534)

Ceiling opening dimensions

Suspension bolt pitch

12-7/16

12-7/8

22-5/8 (575)

6-5/16 6-11/16

2-3/32

1-25/32

1-3/16 (30)

11-5/32 (283)

8-15/32

1-25/32

4-19/32

Less than 31/32 Less than 31/32

The length of the suspension

14-3/32 (358)

24-19/32 (625)

25/32

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.

24-19/32 (625)

13-5/32 (334)

5-9/16

2-3/4 1-9/32

(liquid tube)

Air intake

Discharge outlet

Refrigerant tubing

(gas tube)

22-5/8 (575)

Refrigerant tubing

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")

2-3/32

3-5/8

7-23/32

1-27/32 1-3/32

Unit : inch (mm)

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Indoor Unit CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U & CZ-18BT1U

Indoor unit

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

Heat exchanger

Strainer

Indoor Unit CS-KS18NB4UW & CZ-18BT1U

Indoor unit

Heat exchanger

Strainer

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

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

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

Cooling cycle

5. ELECTRICAL DATA

5-1. Electric Wiring Diagrams

Indoor Unit CS-MKS9NB4U & CZ-18BT1U CS-MKS12NB4U & CZ-18BT1U CS-KS18NB4UW & CZ-18BT1U

FLAP (R)

FLAP (W)

IND LAMP ASSY

COIL-1

BLK

COIL-1

WHT BRN

BLU

ORG

BLK

2P (RED)

ROOM

2P (YEL)

3P (RED)

FLAP

5P (WHT)

IND

7P (WHT)

4P (WHT)

8FA2-5250-46900-2

ROOM

BLK

VLT

BLU PNK YEL

ORG RED BRN

GRN BLK

WHT

BLK

BLK BLK

FLOAT SWITCH

THERMISTOR

ORG

BLU

BRN

WHT

BLK

WHT

BRN

BLU

ORG

BLK

TERMINAL BASE

2 3

TO OUTDOOR UNIT

BRN

DRAIN PUMP

FAN MOTOR

GND

RED

YEL

ORG

GRN/YEL

CORE

FERRITE

PNK

BLU

VLT

YEL/(RED)

BLU YEL

WHT

BLK

RED

1 2 3 4 5 6

RED

WHT

BLK

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

3P (BLU)

DCM

6P (BLU)

AC1 AC2 SI

SERIAL

2P (WHT)

1 1

2 2

RED

WHT

1 1

2 2

SERIAL

2P (WHT)

3P (RED)

6P (WHT)

GRN

BOX BOX

CONTROLLER CONTROLLER

6. MAINTENANCE

6-1. Disassembly Procedure

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

Warning

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.

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.

Latch

Hinge

Latch

Air intake grill

Fig.1

Hinge

Fig.2 Fig.3

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)

Control PCboard

Hook

CN13

CN04

CN12

Screw Control box cover

Fig.4 Fig.5

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)

NOTE

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

There is no strap on the indicator cover.

Indicator cover

Screw

Clamp

Corner cover

Lead wire

Clamp

Corner coverCorner cover

Pull down section 2.

Fig.6 Fig.7

Bolt

Cover

Center 1

Strap

Remove the strap from the hook.

Bolt

Fig.8 Fig.9

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)

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)

CN08

Terminal cover

Screw

Power box cover

Ground cable

Fig.11

Terminal

Fig.12

Power lines / Signal line

(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)

Screw

Ground cable

Screw

12 3

CN07

Fig.13

Screw

CN03

Fig.14

Screw

CN09

Screw

CN06

Fig.15

NOTE

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

Drain cap

Main body lower sectionMain body lower section

Screw

Fig.16

Main body lower section

Main body upper section

Screw

CN03

Fig.18Fig.17

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

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

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

Holder

Drain pump

Screw

Float switch

Nut

Drain hose

Clamp

Fig.20 Fig.21

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)

Turbo fan

Fig.22 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.

Nut

Screw Nut

Fan motor

ScrewHeat exchanger

Screw

Fig.24 Fig.25

Main body upper section

Screw

7. FUNCTIONS

7-1. Operation Functions

Emergency operation SENSOR DRY

Emergency operation is available when the remote controller malfunctions, has been lost, or otherwise cannot be used.

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.

COOL STOP

(GREEN) (Lamp Off)

• The set temperature is 4°F(2°C) below the detected room temperature in the case of cooling operation. The flap and fan speed settings are AUTO.

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.

Load

COOL zone

A zone

B zone

Conditions are monitored at all times when the room temperature is below 59°F(15°C).

DRY A

The compressor operation frequency varies. The indoor fan operates with 1/f fluctuation.

DRY B

The compressor operates at a low operating frequency. The indoor fan operates with 1/f fluctuation.

Monitor

• Monitoring operation takes place when the room temperature is below 59°F temperature.

• When the monitoring range is entered, the compressor stops, and the indoor fan operates with 1/f fluctuation.

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

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.

HIGH POWER

NIGHT SETBACK

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."

Frequency

MAX

30 min. 5 min.

Start End

Time

NOTE

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.

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.

Setting temperature

Press the NIGHT SETBACK button

2°F(1°C)

30 min. 30 min.

Time

Lamp colors

OPERATION lamp

DRY operation Orange COOL operation Green FAN operation Green DEFROSTING operation Red and Orange alternately

OPERATION lamp Green

TIMER lamp Green

HIGH POWER lamp Green

Timer backup

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.

7-2. Protective Functions

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.

(8)

(6)

(2)

temperature °F(°C)

Indoor heat exchanger

Area: Automatic capacity control

When the temperature drops below Point A, the operation

abcd

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.

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