Panasonic KS12NB41A User Manual
TECHNICAL & SERVICE MANUAL
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No.
Body (Panel)
CS-KS12NB41 (CZ-18BT1U)
CS-KS18NB4UW (CZ-18BT1U)
Product Code No.
Body (Panel)
1 852 361 04 (1 852 361 15)
1 852 361 06 (1 852 361 15)
Indoor Unit
Body
Panel
CS-KS12NB41 (Body) & CZ-18BT1U (Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)
Outdoor Model No. Product Code No.
CU-KS18NKU
CU-KS12NK1A
CU-KS18NKUA
1 852 361 18
1 852 361 16
1 852 361 19
Outdoor Unit
CU-KS12NK1A
Remote Controller
Wired Remote Controller
(Option)
CU-KS18NKU
CU-KS18NKUA
REFERENCE NO. SM700879
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
Prohibit
Prohibit
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.
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
Prohibit
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
Prohibit
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.
3
Table of Contents
Page
SAFETY PRECAUTIONS
TABLE OF CONTENTS
1. OPERATING RANGE
2. SPECIFICATIONS
2-1. Unit Specifications
2-2. Major Component Specifications
2-3. Other Component Specifications
3. DIMENSIONAL DATA
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
5. PERFORMANCE DATA
5-1. Temperature Charts
5-2. Cooling Capacity
5-3. Cooling Capacity (Low Ambient)
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2
4
6
7
17
22
23
26
28
30
32
6. ELECTRICAL DATA
6-1. Electrical Characteristics
6-2. Electric Wiring Diagrams
7. MAINTENANCE
7-1. Address Setting of the Remote Control Unit
7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit
7-3. Disassembly Procedure
8. FUNCTIONS
8-1. Operation Functions
8-2. Protective Functions
9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
9-1. Precautions before Performing Inspection or Repair
9-2. Method of Self-Diagnostics
9-3. Checking the Indoor and Outdoor Units
9-4. Trouble Diagnosis of Fan Motor
9-5. Noise Malfunction and Electromagnetic Interference
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34
36
39
40
41
48
50
51
51
53
57
59
4
10. CHECKING ELECTRICAL COMPONENTS
10-1. Measurement of Insulation Resistance
10-2. Checking Continuity of Fuse on PCB Ass'y
11. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1. Characteristics of New Refrigerant R410A
11-2. Checklist before Servicing
11-3. Tools Specifically for R410A
11-4. Tubing Installation Procedures
11-5. In Case of Compressor Malfunction
11-6. In Case Refrigerant is Leaking
11-7. Charging Additional Refrigerant
11-8. Retro-Fitting Existing Systems
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Page
60
61
62
63
64
64
65
67
68
68
APPENDIX A Operating Instructions
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
APPENDIX B INSTALLATION INSTRUCTIONS
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
APPENDIX C Operating Instructions
(CZ-RD515U)
APPENDIX D INSTALLATION INSTRUCTIONS
(CZ-RD515U)
()
()
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A-1
A-2
A-3
A-4
5
1. OPERATING RANGE
Models : CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Maximum
Minimum
Models : CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
Temperature Indoor Air Intake Temp. Outdoor Air Intake Temp.
Cooling
Maximum
Minimum
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
67 °F DB
115 °F DB
0 °F DB
6
2. SPECIFICATIONS
2-1. Unit Specifications
2-1-1.
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
Voltage Rating
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Air Circulation (Hi/Me/Lo) ft
Moisture Removal (High) Pints/h
Available Voltage Range
Running Amperes
EER BTU/h/W 9.41
SEER BTU/Wh 16
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A 15
Controls / Temperature Control
Control Unit
Timer
Indoor / OutdoorFan Speeds
Airflow Direction (Indoor) Horizontal
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Features
Operation Sound
Refrigerant Tubing Connections
Refrigerant inch (mm)
Tube Diameter inch (mm)
Wired Remote Controller (Option) CZ-RD515U
Indoor : Hi/Me/Lo
Outdoor : Hi
Narrow tube
Wide tube
BTU/h
BTU/h
BTU/h
3
/min (m3/h)
Vertical
dB-A
dB-A
ft (m)Max. allowable tubing length at shipment
kW
V
A
WPower Input
%Power Factor 97
A 17.5
24-Hour ON or OFF Timer, 1-Hour OFF Timer
230V Single-Phase 60Hz
17,500
5.15
341 (579) / 294 (500) / 253 (430)
8.3
1,860
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Auto and 3 steps / Auto (Hi, Me, Lo)
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Flare Type
< 230V >
Cooling
( 4,000 to 17,500 )
( 1.2 to 5.15 )
10,600
6,900
4.89
187 to 253
( 1.2 to 8.3 )
( 250 to 1,860 )
-
Auto
51
25 (7.5)
1/4 (6.35)
1/2 (12.7)
7
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Shipping Volume
Net
Shipping
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
cu.ft (m
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
(313)12-5/16
(625)24-19/32
(625)24-19/32
-
-
(18.7)41.3
-
3
)
-
Individual Unit
Body
(CS-KS18NB4UW)
11-5/32 (283)
22-5/8 (575)
22-5/8 (575)
24-19/32 (625)
24-19/32 (625)
11-13/32 (290)
24-13/16 (630)
28-1/8 (714)
26-11/16 (678)
35.3 (16)
41.9 (19)
4.59 (0.13)
< 230V >
Panel
(CZ-18BT1U)
1-9/16 (40)
4-1/8 (105)
26-3/16 (665)
6.0 (2.7)
7.7 (3.5)
1.65 (0.04)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Net
Shipping
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
Outdoor Unit
(CU-KS18NKU)
inch (mm) (670)26-3/8
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
(880)34-21/32
(285)11-7/32
(733)28-27/32
(1,012)39-27/32
(379)14-29/32
(41.0)90.4
(45.0)99.2
(0.28)9.88
8
2-1-2.
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
Voltage Rating
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Air Circulation (Hi/Me/Lo) ft
Moisture Removal (High) Pints/h
Available Voltage Range
Running Amperes
EER BTU/h/W 9.41
SEER BTU/Wh 16
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A 15
Controls / Temperature Control
Control Unit
Timer
Indoor / OutdoorFan Speeds
Airflow Direction (Indoor) Horizontal
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Features
Operation Sound
Refrigerant Tubing Connections
Refrigerant inch (mm)
Tube Diameter inch (mm)
Wired Remote Controller (Option) CZ-RD515U
Indoor : Hi/Me/Lo
Outdoor : Hi
Narrow tube
Wide tube
BTU/h
BTU/h
BTU/h
3
/min (m3/h)
Vertical
dB-A
dB-A
ft (m)Max. allowable tubing length at shipment
kW
V
A
WPower Input
%Power Factor 98
A 17.5
24-Hour ON or OFF Timer, 1-Hour OFF Timer
208V Single-Phase 60Hz
17,500
5.15
341 (579) / 294 (500) / 253 (430)
9.1
1,860
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Auto and 3 steps / Auto (Hi, Me, Lo)
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Flare Type
< 208V >
Cooling
( 4,000 to 17,500 )
( 1.2 to 5.15 )
10,600
6,900
4.89
187 to 253
( 1.2 to 9.1 )
( 250 to 1,860 )
-
Auto
51
25 (7.5)
1/4 (6.35)
1/2 (12.7)
9
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Shipping Volume
Net
Shipping
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
cu.ft (m
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
(313)12-5/16
(625)24-19/32
(625)24-19/32
-
-
(18.7)41.3
-
3
)
-
Individual Unit
Body
(CS-KS18NB4UW)
11-5/32 (283)
22-5/8 (575)
22-5/8 (575)
24-19/32 (625)
24-19/32 (625)
11-13/32 (290)
24-13/16 (630)
28-1/8 (714)
26-11/16 (678)
35.3 (16)
41.9 (19)
4.59 (0.13)
< 208V >
Panel
(CZ-18BT1U)
1-9/16 (40)
4-1/8 (105)
26-3/16 (665)
6.0 (2.7)
7.7 (3.5)
1.65 (0.04)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Net
Shipping
Shipping Volume
Remarks: Rating conditions are:
Cooling: Indoor air temperature
Outdoor air temperature
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
Outdoor Unit
(CU-KS18NKU)
inch (mm) (670)26-3/8
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
(880)34-21/32
(285)11-7/32
(733)28-27/32
(1,012)39-27/32
(379)14-29/32
(41.0)90.4
(45.0)99.2
(0.28)9.88
10
2-1-3.
Indoor Unit CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Voltage Rating
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Air Circulation (Hi/Me/Lo) ft
Moisture Removal (High) Pints/h
Available Voltage Range
Running Amperes
EER BTU/h/W 9.44
SEER BTU/Wh 16
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A 20
Controls / Temperature Control
Control Unit
Timer
Indoor / OutdoorFan Speeds
Airflow Direction (Indoor) Horizontal
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Features
Operation Sound
Refrigerant Tubing Connections
Refrigerant inch (mm)
Tube Diameter inch (mm)
Wired Remote Controller (Option) CZ-RD515U
Indoor : Hi/Me/Lo
Outdoor : Hi
Narrow tube
Wide tube
BTU/h
BTU/h
BTU/h
3
/min (m3/h)
Vertical
dB-A
dB-A
ft (m)Max. allowable tubing length at shipment
kW
V
A
WPower Input
%Power Factor 87
A20
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi and multi steps)
115V Single-Phase 60Hz
Cooling
11,900
235 (399) / 206 (350) / 194 (330)
12.6
1,260
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
( 3,000 to 11,900 )
3.5
( 0.9 to 3.5 )
7,200
4,700
4.26
104 to 126
( 2.5 to 12.6 )
( 250 to 1,260 )
Auto
Washable, Anti-Mold
DC Rotary (Inverter)
R410A / 2.43 (1,100)
Electric Expansion Valve
34 / 32 / 31
Flare Type
25 (7.5)
1/4 (6.35)
3/8 (9.52)
-
47
11
Indoor Unit CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth 28-1/8 (714)
Weight Ib. (kg)
Net
Shipping
Shipping Volume
Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Net
Shipping
Shipping Volume
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-KS12NB41 & CZ-18BT1U)
inch (mm) (313)12-5/16
inch (mm) 22-5/8 (575)
inch (mm)
(625)24-19/32
(625)24-19/32
inch (mm) -
inch (mm) 24-13/16 (630)
inch (mm)
-
(18.7)41.3
Ib. (kg)
cu.ft (m
3
)
-
-
Body
(CS-KS12NB41)
11-5/32 (283)
22-5/8 (575)
11-13/32 (290)
35.3 (16)
41.9 (19)
4.59 (0.13)
Outdoor Unit
(CU-KS12NK1A)
inch (mm) (548)21-9/16
Individual Unit
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
(720)28-11/32
(265)10-7/16
(596)23-15/32
(866)34-3/32
(368)14-1/2
(34.0)75.0
Ib. (kg)
cu.ft (m
3
)
(37.0)81.6
(0.18)6.35
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)
12
2-1-4.
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
Voltage Rating
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Air Circulation (Hi/Me/Lo) ft
Moisture Removal (High) Pints/h
Available Voltage Range
Running Amperes
EER BTU/h/W 9.41
SEER BTU/Wh 16
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A 15
Controls / Temperature Control
Control Unit
Timer
Indoor / OutdoorFan Speeds
Airflow Direction (Indoor) Horizontal
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Features
Operation Sound
Refrigerant Tubing Connections
Refrigerant inch (mm)
Tube Diameter inch (mm)
Wired Remote Controller (Option) CZ-RD515U
Indoor : Hi/Me/Lo
Outdoor : Hi
Narrow tube
Wide tube
BTU/h
BTU/h
BTU/h
3
/min (m3/h)
Vertical
dB-A
dB-A
ft (m)Max. allowable tubing length at shipment
kW
V
A
WPower Input
%Power Factor 97
A 17.5
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi and multi steps)
230V Single-Phase 60Hz
17,500
5.15
341 (579) / 294 (500) / 253 (430)
8.3
1,860
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Flare Type
< 230V >
Cooling
( 4,000 to 17,500 )
( 1.2 to 5.15 )
10,600
6,900
4.89
187 to 253
( 1.2 to 8.3 )
( 250 to 1,860 )
-
Auto
51
25 (7.5)
1/4 (6.35)
1/2 (12.7)
13
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Shipping Volume
Net
Shipping
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
cu.ft (m
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
(313)12-5/16
(625)24-19/32
(625)24-19/32
-
-
(18.7)41.3
-
3
)
-
Individual Unit
Body
(CS-KS18NB4UW)
11-5/32 (283)
22-5/8 (575)
22-5/8 (575)
24-19/32 (625)
24-19/32 (625)
11-13/32 (290)
24-13/16 (630)
28-1/8 (714)
26-11/16 (678)
35.3 (16)
41.9 (19)
4.59 (0.13)
< 230V >
Panel
(CZ-18BT1U)
1-9/16 (40)
4-1/8 (105)
26-3/16 (665)
6.0 (2.7)
7.7 (3.5)
1.65 (0.04)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Net
Shipping
Shipping Volume
Remarks: Rating conditions are:
Cooling: Indoor air temperature
Outdoor air temperature
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
Outdoor Unit
(CU-KS18NKUA)
inch (mm) (670)26-3/8
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
(880)34-21/32
(285)11-7/32
(733)28-27/32
(1,012)39-27/32
(379)14-29/32
(41.0)90.4
(45.0)99.2
(0.28)9.88
14
2-1-5.
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
Voltage Rating
Total Capacity
Sensible Capacity
Latent Capacity
Performance
Air Circulation (Hi/Me/Lo) ft
Moisture Removal (High) Pints/h
Available Voltage Range
Running Amperes
EER BTU/h/W 9.41
SEER BTU/Wh 16
Compressor Locked Rotor Amperes
Electrical Rating
Fuse or Circuit Breaker Capacity A 15
Controls / Temperature Control
Control Unit
Timer
Indoor / OutdoorFan Speeds
Airflow Direction (Indoor) Horizontal
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
Features
Operation Sound
Refrigerant Tubing Connections
Refrigerant inch (mm)
Tube Diameter inch (mm)
Wired Remote Controller (Option) CZ-RD515U
Indoor : Hi/Me/Lo
Outdoor : Hi
Narrow tube
Wide tube
BTU/h
BTU/h
BTU/h
3
/min (m3/h)
Vertical
dB-A
dB-A
ft (m)Max. allowable tubing length at shipment
kW
V
A
WPower Input
%Power Factor 98
A 17.5
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi and multi steps)
208V Single-Phase 60Hz
17,500
5.15
341 (579) / 294 (500) / 253 (430)
9.1
1,860
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Flare Type
< 208V >
Cooling
( 4,000 to 17,500 )
( 1.2 to 5.15 )
10,600
6,900
4.89
187 to 253
( 1.2 to 9.1 )
( 250 to 1,860 )
-
Auto
51
25 (7.5)
1/4 (6.35)
1/2 (12.7)
15
Indoor Unit CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
Dimensions & Weight (Indoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Shipping Volume
Net
Shipping
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
cu.ft (m
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
(313)12-5/16
(625)24-19/32
(625)24-19/32
-
-
(18.7)41.3
-
3
)
-
Individual Unit
Body
(CS-KS18NB4UW)
11-5/32 (283)
22-5/8 (575)
22-5/8 (575)
24-19/32 (625)
24-19/32 (625)
11-13/32 (290)
24-13/16 (630)
28-1/8 (714)
26-11/16 (678)
35.3 (16)
41.9 (19)
4.59 (0.13)
< 208V >
Panel
(CZ-18BT1U)
1-9/16 (40)
4-1/8 (105)
26-3/16 (665)
6.0 (2.7)
7.7 (3.5)
1.65 (0.04)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions Height
Width
Depth
Package Dimensions Height
Width
Depth
Weight Ib. (kg)
Net
Shipping
Shipping Volume
Remarks: Rating conditions are:
Cooling: Indoor air temperature
Outdoor air temperature
80 °F DB / 67 °F WB
95 °F DB / 75 °F WB
Outdoor Unit
(CU-KS18NKUA)
inch (mm) (670)26-3/8
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
3
cu.ft (m
)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
(880)34-21/32
(285)11-7/32
(733)28-27/32
(1,012)39-27/32
(379)14-29/32
(41.0)90.4
(45.0)99.2
(0.28)9.88
16
2-2. Major Component Specifications
2-2-1. Indoor Unit
Indoor Unit (Body) CS-KS12NB41
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-KS12NB4U
Microprocessor
250V 3A
Turbo
1 ... D12-5/8 / L5-3/4 (D322/L147)
DC Motor
SIC-62FW-D866-2 ... 1
8
470
DC160V / 23W
-
Internal Controller
Yes
Yes
-
-
Drain Pump
Model ... Q'ty
Rating Voltage, Hz
(Ambient Temp. 68 °F (20 °C))
Safty Device
Heat Exchanger Coil
Coil
Rows
Fins per inch
Input
Type
Open
W
Ohm
°F (°C)
2
(m2)
ft
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
PLD-12115ST-1 ... 1
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.
AC115V, 60Hz
10.8
101 +/- 10%Coil Resistance
Thermal Fuse
293 (145)
2
18.1
2.94 (0.273) Face Area
MP24ZN-12V ... 2
DC 12V
17
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
8
650
DC340V / 20WRating Voltage / Nominal Output
-
Internal Controller
Yes
Yes
-
-
Drain Pump
Model ... Q'ty
PLD-12230ST-1 ... 1
Rating Voltage, Hz
Input
W
Ohm
(Ambient Temp. 68 °F (20 °C))
Safty Device
Type
Open
°F (°C)
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
Fins per inch
2
(m2)
ft
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
AC208 to 240V, 60Hz
10.8
333 +/- 10%Coil Resistance
Thermal Fuse
293 (145)
2
18.1
2.94 (0.273) Face Area
DC 12V
18
2-2-2. Outdoor Unit
Outdoor Unit CU-KS18NKU
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Operation Temp.
Micro F
VAC
CB-CU-KS18NKU
Microprocessor
250V 25A
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S :
S - T :
T - R :
0.482
0.482
0.482
Yes
Yes
Yes
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over- Current Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D16-17/32 (D420)
DC Motor
SIC-67FV-F460-1 ... 1
8
820
50
RED - WHT :
WHT - BLU :
BLU - RED :
77.5
77.5
77.5
Internal Controller
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
21.2
5.49 (0.510)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
19
Outdoor Unit CU-KS12NK1A
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Operation Temp.
Micro F
VAC
CB-CU-KS12NK1A
Microprocessor
125V 25A
DC Rotary (Hermetic)
G4C090LU1ER / 900W
FV50S ... 0.68 (320)
U - V :
V - W :
W - U :
0.81
0.81
0.81
Yes
Yes
Yes
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
115V 20W
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over- Current Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D15-3/4 (D400)
DC Motor
SIC-67FV-F460-1 ... 1
8
750
50
RED - WHT :
WHT - BLU :
BLU - RED :
77.5
77.5
77.5
Internal Controller
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
18.1
3.95 (0.367)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
20
Outdoor Unit CU-KS18NKUA
Control PCB
Part No.
Controls
Control Circuit Fuse
Compressor
Type
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C))
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Overload Relay
Run Capacitor
Crankcase Heater
Pints (cc)
Ohm
Model
Operation Temp.
Micro F
VAC
CB-CU-KS18NKUA
Microprocessor
250V 25A
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S :
S - T :
T - R :
0.482
0.482
0.482
Yes
Yes
Yes
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
Fan
Type
Q'ty ... Dia. inch (mm)
Fan Motor
Type
Model ... Q'ty
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Over- Current Protection
Run Capacitor
Heat Exchanger Coil
Coil
Rows
Fins per inch
Face Area
W
Ohm
Micro F
VAC
2
ft
(m2)
Propeller
1 ... D16-17/32 (D420)
DC Motor
SIC-67FV-F460-1 ... 1
8
820
50
RED - WHT :
WHT - BLU :
BLU - RED :
77.5
77.5
77.5
Internal Controller
Yes
-
-
Aluminum Plate Fin / Copper Tube
2
21.2
5.49 (0.510)
External Finish Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
21
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