Panasonic CS-MKS9NB4U Operating manual

CU-3KS19NBU (3-room multi unit)
CU-4KS24NBU (4-room multi unit)
CU-4KS31NBU (4-room multi unit)
< Applicable Multi-Outdoor Units >
INDOOR UNIT : CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U& CZ-18BT1U
CS-KS18NB4UW& CZ-18BT1U
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Semi-Concealed Type Indoor Unit
1 852 361 08 (1 852 361 15)
1 852 361 09 (1 852 361 15)
1 852 361 06 (1 852 361 15)
9,000BTU / h
11,900BTU / h
17,500BTU / h
CS-MKS9NB4U (CZ-18BT1U)
CS-MKS12NB4U (CZ-18BT1U)
CS-KS18NB4UW (CZ-18BT1U)
Product Code No.
Body (Panel)
Capacity Indoor Model No.
Body (Panel)
TECHNICAL & SERVICE MANUAL
REFERENCE NO. SM700881
CS-MKS9NB4U (Body) & CZ-18BT1U (Panel)
CS-MKS12NB4U (Body) & CZ-18BT1U(Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U(Panel)
Remote Controller Wired Remote Controller
(Option)
Body
Panel

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.
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• 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.
2

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.
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3

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-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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TABLE OF CONTENTS
2
4
6
7
8
14
17
18
19
20
21
28
30
31
31
33
37
38
A-1
A-2
A-3
Page
()
4

APPENDIX D Operating Instructions
(CZ-RD515U)
APPENDIX E INSTALLATION INSTRUCTIONS
(CZ-RD515U)
............................................................................................
............................................................................
A-4
A-5
Page
5

APPLICABLE MULTI-OUTDOOR UNITS
CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
3-Room
CU-3KS19NBU
YES
YES
YES
4-Room
CU-4KS24NBU
YES
YES
YES
4-Room
CU-4KS31NBU
YES
YES
YES
Indoor Unit
Multi-Outdoor Unit
6

95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
1. OPERATING RANGE
Maximum
Minimum
115 °F DB
14 °F DB
Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
7

2. SPECIFICATIONS
2-1. Unit Specifications
Indoor Unit CS-MKS9NB4U & CZ-18BT1U
2-1-1.
Vertical
dB-AIndoor : Hi/Me/Lo
Air Filter
Refrigerant
0.1
16
9,000
2.65
Cooling
230V Single-Phase 60Hz
187 to 253
Refrigerant Tubing Connections
Operation Sound
Electrical Rating
WPower Input
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<230V>
Type
221(376)/206(350)/194(330)
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
3.4
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
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-MKS9NB4U)
Panel
(CZ-18BT1U)
Indoor Unit
(CS-MKS9NB4U & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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)
8

Indoor Unit CS-MKS9NB4U & 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
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<208V>
Type
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
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
Outdoor air temperature
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-MKS9NB4U)
Panel
(CZ-18BTCS)
Indoor Unit
(CS-MKS9NB4U & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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
15
9,000
2.65
221(376)/206(350)/194(330)
3.4
Performance
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
9

Indoor Unit CS-MKS12NB4U & CZ-18BT1U
Vertical
dB-AIndoor : Hi/Me/Lo
Air Filter
Refrigerant
0.11
17
11,900
3.5
Cooling
230V Single-Phase 60Hz
187 to 253
Refrigerant Tubing Connections
Operation Sound
Electrical Rating
WPower Input
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<230V>
Type
235(399)/206(350)/194(330)
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.26
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
Outdoor air temperature
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-MKS12NB4U)
Panel
(CZ-18BT1U)
Indoor Unit
(CS-MKS12NB4U & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
10

Indoor Unit CS-MKS12NB4U & 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
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<208V>
Type
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
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
Outdoor air temperature
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-MKS12NB4U)
Panel
(CZ-18BT1U)
Indoor Unit
(CS-MKS12NB4U & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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
16
11,900
3.5
235(399)/206(350)/194(330)
4.26
Performance
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
11

Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Vertical
dB-AIndoor : Hi/Me/Lo
Air Filter
Refrigerant
0.15
22
17,500
5.15
Cooling
230V Single-Phase 60Hz
187 to 253
Refrigerant Tubing Connections
Operation Sound
Electrical Rating
WPower Input
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<230V>
Type
341(579)/294(500)/253(430)
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89
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
Outdoor air temperature
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-KS18NB4UW)
Panel
(CZ-18BT1U)
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
12

Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Vertical
dB-AIndoor : Hi/Me/Lo
Air Filter
Refrigerant
0.16
22
17,500
5.15
Cooling
208V Single-Phase 60Hz
187 to 253
Refrigerant Tubing Connections
Operation Sound
Electrical Rating
WPower Input
--
V
A
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
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
kW
Total Capacity
Semi-Concealed Type Indoor Unit
<208V>
Type
341(579)/294(500)/253(430)
Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89
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
Outdoor air temperature
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
Shipping Volume
Net
Shipping
Weight Ib. (kg)
Ib. (kg)
cu.ft (m3)
inch (mm)
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
-
-
22-5/8 (575)
35.3 (16)
Individual Unit
Body
(CS-KS18NB4UW)
Panel
(CZ-18BT1U)
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
inch (mm) (313)12-5/16
(625)24-19/32
(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
13

Indoor Unit (Body) CS-MKS9NB4U
2-2. Major Component Specifications
2-2-1. Indoor Unit
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 3A
CB-CS-MKS9NB4U
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
PLD-12230ST-1 ... 1
AC208 to 240V, 60Hz
10.8
333 +/- 10%Coil Resistance
Model ... Q'ty
Rating Voltage, Hz
Input
Drain Pump
Ohm
W
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
2
18.1
2.94 (0.273)Face Area
Coil
Rows
Fins per inch
Heat Exchanger Coil
ft2(m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Yes
1 ... D12-5/8 / L5-3/4 (D322/L147)
Turbo
DC Motor
SIC-62FW-D866-2 ... 1
8
-
DC280V / 23W
440
Internal Controller
Yes
-
-
Fan
Q'ty ... Dia. and Length
Type
inch (mm)
Fan Motor
Rating Voltage / Nominal Output
Coil Resistance
Rough Measure RPM (Cool)
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
14

Indoor Unit (Body) CS-MKS12NB4U
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 3A
CB-CS-MKS12NB4U
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
2
18.1
2.94 (0.273)Face Area
Coil
Rows
Fins per inch
Heat Exchanger Coil
ft2(m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
1 ... D12-5/8 / L5-3/4 (D322/L147)
Turbo
DC Motor
SIC-62FW-D866-2 ... 1
8
-
470
Thermal Fuse
-
-
Fan
Q'ty ... Dia. and Length
Type
inch (mm)
Fan Motor
Coil Resistance
Rough Measure RPM (Cool)
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
W
Thermal Fuse
293 (145)
(Ambient Temp. 68 °F (20 °C))
Safety Device
Open
Type
°F (°C)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Yes
Yes
Over- Current Protection
Over- Heat Protection
DC280V / 23WRating Voltage / Nominal Output
15

Indoor Unit (Body) CS-KS18NB4UW
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 3A
CB-CS-KS18NB4U
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
2
18.1
2.94 (0.273)Face Area
Coil
Rows
Fins per inch
Heat Exchanger Coil
ft2(m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
1 ... D12-5/8 / L5-3/4 (D322/L147)
Turbo
DC Motor
SIC-62FW-D866-2 ... 1
8
-
650
Internal Controller
-
-
Fan
Q'ty ... Dia. and Length
Type
inch (mm)
Fan Motor
Coil Resistance
Rough Measure RPM (Cool)
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
W
Thermal Fuse
293 (145)
(Ambient Temp. 68 °F (20 °C))
Safety Device
Open
Type
°F (°C)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Yes
Yes
Over- Current Protection
Over- Heat Protection
DC340V / 20WRating Voltage / Nominal Output
16

2-3. Other Component Specifications
Indoor Unit CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
032 50 68 86 104 122 140 158 176 194
(0) (10) (20) (30) (40) (50) (60) (70) (80) (90)
40
60
80
100
120
140
160
180
200
20
50
1
0
2
3
4
5
6
7
8
9
10
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)
Resistance (k ohm)
Temperature °F (°C) Temperature °F (°C)
17

3. DIMENSIONAL DATA
Indoor Unit CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
6-5/16 6-11/16
1-3/16 (30)
4-19/32 1-25/32
1-25/32
2-3/32
8-15/32
22-5/8 (575)
11-5/32 (283)
3
6
5
Less than 31/32Less than 31/32
3-5/8
22-5/8 (575)
12-7/8
Suspension bolt pitch
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
7
Center of panel
24-19/32 (625)
24-19/32 (625)
13-5/32 (334)
14-3/32 (358)
1
2
2
2
2
7-11/16
4-29/32
A View
8
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.
AA
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")
1 2 3 4 5 6 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)
18

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-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Cooling cycle
Indoor unit
Cooling cycle
Indoor unit
Heat exchanger
Strainer
Heat exchanger
Strainer
19

5. ELECTRICAL DATA
5-1. Electric Wiring Diagrams
Indoor Unit CS-MKS9NB4U & CZ-18BT1U
CS-MKS12NB4U & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
8FA2-5250-46900-2
1 2 3 4 5 6 1 2 3 4 5 6
FM DP
FAN MOTOR
DRAIN PUMP
DCM
6P (BLU)
6P (WHT)
DP
3P (BLU)
3P (RED)
PWM/POW 7P (RED) PWM/POW 7P (RED) RC
4P (WHT)
IND
7P (WHT)
FS
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
1
RED
YEL
BLU
1 1
YEL/(RED)
3 3
1 1
2
1 1 2 2
1 1 2 2
2
3 3
4 4
5 5
6 6
7 7
1 1
2 2
3 3
4 4
5 5
6 6
7 7
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
6 6
7 7
1 1
2 2
3 3
4 4
1 1
2 2
1 1
3 3
3 3
4 4
5 5
1 1
2 2
1 1
2 2
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
6 6
6 6
7 7
8 8
9 9
10 10
YEL/(RED)
BRN RED
ORG
YEL
PNK
BLU
VLT
2 3
RED
BLK
BLK
WHT
WHT
GRN/YEL
RED
WHT
GRN
WHT
BLK
GRN
BRN
RED
ORG
YEL
PNK
BLU
VLT
BLK
BLK
FLAP (R)
THERMISTOR
ROOM
COIL-1
1 1
2 2
3 3
4 4
5 5
BLK
ORG
BLU
BRN
WHT
BLK
BLK
ORG
ORG
BLU
BLU
BRN
BRN
WHT
WHT
BLK
BLK
BLK
BLK
20