Panasonic CU-KS18NKU Operating manual

TECHNICAL & SERVICE MANUAL
CS-KS18NKU + CU-KS18NKU
+ CU-KS18NKUA
CS-KS24NKU + CU-KS24NKU
+ CU-KS24NKUA
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Unit
Outdoor Model No.
CU-KS18NKU
CU-KS18NKUA
CU-KS24NKU
CU-KS24NKUA
Product Code No.
1 852 361 18
1 852 361 19
1 852 361 21
1 852 361 22
Outdoor Unit
CS-KS18NKU
CS-KS24NKU
CU-KS18NKU
CU-KS18NKUA
CU-KS24NKU
CU-KS24NKUA
REFERENCE NO. SM700872
Indoor Model No.
CS-KS18NKU
CS-KS24NKU
Product Code No.
1 852 360 90
1 852 360 91
AIRCO
N
DITIONER
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.

• 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
Prohibit
Prohibit
Prohibit
Prohibit
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.
Prohibit
Prohibit
Prohibit
Prohibit
Prohibit
3

Table of Contents
1. OPERATING RANGE
2. SPECIFICATIONS
2-1.Unit Specifications
2-2.Major Component Specifications
2-3.Other Component Specifications
3. DIMENSIONAL DATA
4. REFRIGERANT FLOW DIAGRAM
4-1.Refrigerant Flow Diagram
5. PERFORMANCE DATA
5-1.Temperature Charts
5-2.Cooling Capacity
5-3.Cooling Capacity (Low Ambient)
5-4.Air Throw Distance Charts
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
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
10. CHECKING ELECTRICAL COMPONENTS
10-1.Measurement of Insulation Resistance
10-2.Checking Continuity of Fuse on PCB Ass'y
6
7
15
21
22
25
26
30
32
34
36
38
42
43
44
46
47
47
50
54
56
57
58
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4

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
APPENDIX A Operating Instructions
APPENDIX B INSTALLATION INSTRUCTIONS
59
60
61
61
62
64
65
65
A-1
A-2
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5

95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
1.OPERATING RANGE
Maximum
Minimum
115 °F DB
67 °F DB
Temperature Indoor Air Intake Temp.Outdoor Air Intake Temp.
Cooling
95 °
67 °F DB / 57 °F WB
Maximum
Minimum
115 °F DB
0 °F DB
Temperature Indoor Air Intake Temp.Outdoor Air Intake Temp.
Cooling
Models:CS-KS18NKU + CU-KS18NKU
CS-KS24NKU + CU-KS24NKU
Models:CS-KS18NKU + CU-KS18NKUA
CS-KS24NKU + CU-KS24NKUA
F DB / 71 °F WB
6

2. SPECIFICATIONS
2-1. Unit Specifications
Indoor UnitCS-KS18NKU
Outdoor UnitCU-KS18NKU < 230V >
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
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
7.0
1,500
( 1.2 to 7.0 )
( 250 to 1,500 )
17,500
5.15
( 4,000 to 17,500 )
( 1.2 to 5.15 )
Shipping Volume
Cooling
13,100
4,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
230V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
90.4
99.2
9.88
(41.0)
(45.0)
(0.28)
(298 × 1,065 × 219) (670 × 880 × 285)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 26-3/8 × 34-21/32 × 11-7/32
1/4 (6.35)
1/2 (12.7)
ft (m)Max.allowable tubing length at shipment
Flare Type
25 (7.5)
42 / 38 / 30 / 28
51
R410A / 2.87 (1,300)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 93
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 20
524 (890) / 441 (749) / 377 (641)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 11.7
Fuse or Circuit Breaker Capacity A 15
4.59 (0.13)
(733 × 1,012 × 379)(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
28-27/32 × 39-27/32 × 14-29/32
7

Indoor UnitCS-KS18NKU
Outdoor UnitCU-KS18NKU < 208V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
7.7
1,500
( 1.2 to 7.7 )
( 250 to 1,500 )
17,500
5.15
( 4,000 to 17,500 )
( 1.2 to 5.15 )
Shipping Volume
Cooling
13,100
4,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
208V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
90.4
99.2
9.88
(41.0)
(45.0)
(0.28)
(298 × 1,065 × 219) (670 × 880 × 285)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 26-3/8 × 34-21/32 × 11-7/32
1/4 (6.35)
1/2 (12.7)
ft (m)Max.allowable tubing length at shipment
Flare Type
25 (7.5)
42 / 38 / 30 / 28
51
R410A / 2.87 (1,300)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 94
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 20
524 (890) / 441 (749) / 377 (641)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 11.7
Fuse or Circuit Breaker Capacity A 15
4.59 (0.13)
(733 × 1,012 × 379)(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
28-27/32 × 39-27/32 × 14-29/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
8

Indoor UnitCS-KS24NKU
Outdoor UnitCU-KS24NKU < 230V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
10.8
2,460
( 1.3 to 10.8 )
( 280 to 2,460 )
24,200
7.1
( 4,000 to 24,200 )
( 1.2 to 7.1 )
Shipping Volume
Cooling
14,800
9,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
230V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
119.0
127.9
13.41
(54.0)
(58.0)
(0.38)
34-3/16 × 41-11/32 × 16-21/32
(868 × 1,050 × 423)
(298 × 1,065 × 219) (740 × 900 × 320)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 29-1/8 × 35-7/16 × 12-19/32
1/4 (6.35)
5/8 (15.88)
ft (m)Max.allowable tubing length at shipment
Flare Type
33 (10)
47 / 44 / 41 / 30
55
R410A / 4.30 (1,950)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 99
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 17
659 (1,120) / 571 (970) / 494 (839)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 9.8
Fuse or Circuit Breaker Capacity A 20
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
9

Indoor UnitCS-KS24NKU
Outdoor UnitCU-KS24NKU < 208V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
12.1(1.3 to 12.1 )
24,200
7.1
( 4,000 to 24,200 )
( 1.2 to 7.1 )
Shipping Volume
Cooling
14,800
9,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
208V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
119.0
127.9
13.41
(54.0)
(58.0)
(0.38)
34-3/16 × 41-11/32 × 16-21/32
(868 × 1,050 × 423)
(298 × 1,065 × 219) (740 × 900 × 320)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 29-1/8 × 35-7/16 × 12-19/32
1/4 (6.35)
5/8 (15.88)
ft (m)Max.allowable tubing length at shipment
Flare Type
33 (10)
47 / 44 / 41 / 30
55
R410A / 4.30 (1,950)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 98
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 17
659 (1,120) / 571 (970) / 494 (839)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 9.8
Fuse or Circuit Breaker Capacity A 20
2,460 ( 280 to 2,460 )
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
10

Indoor UnitCS-KS18NKU
Outdoor UnitCU-KS18NKUA < 230V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
7.0
1,500
( 1.2 to 7.0 )
( 250 to 1,500 )
17,500
5.15
( 4,000 to 17,500 )
( 1.2 to 5.15 )
Shipping Volume
Cooling
13,100
4,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
230V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
90.4
99.2
9.88
(41.0)
(45.0)
(0.28)
(298 × 1,065 × 219) (670 × 880 × 285)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 26-3/8 × 34-21/32 × 11-7/32
1/4 (6.35)
1/2 (12.7)
ft (m)Max.allowable tubing length at shipment
Flare Type
25 (7.5)
42 / 38 / 30 / 28
51
R410A / 2.87 (1,300)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hiand multisteps)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 93
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 20
524 (890) / 441 (749) / 377 (641)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 11.7
Fuse or Circuit Breaker Capacity A 15
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
(733 × 1,012 × 379)
28-27/32 × 39-27/32 × 14-29/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
11

Indoor UnitCS-KS18NKU
Outdoor UnitCU-KS18NKUA < 208V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
7.7
1,500
( 1.2 to 7.7 )
( 250 to 1,500 )
17,500
5.15
( 4,000 to 17,500 )
( 1.2 to 5.15 )
Shipping Volume
Cooling
13,100
4,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
208V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
90.4
99.2
9.88
(41.0)
(45.0)
(0.28)
(298 × 1,065 × 219) (670 × 880 × 285)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 26-3/8 × 34-21/32 × 11-7/32
1/4 (6.35)
1/2 (12.7)
ft (m)Max.allowable tubing length at shipment
Flare Type
25 (7.5)
42 / 38 / 30 / 28
51
R410A / 2.87 (1,300)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hiand multisteps)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 94
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 20
524 (890) / 441 (749) / 377 (641)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 11.7
Fuse or Circuit Breaker Capacity A 15
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
(733 × 1,012 × 379)
28-27/32 × 39-27/32 × 14-29/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
12

Indoor Unit CS-KS24NKU
Outdoor Unit CU-KS24NKUA < 230V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
10.8 ( 1.3 to 10.8 )
24,200
7.1
( 4,000 to 24,200 )
( 1.2 to 7.1 )
Shipping Volume
Cooling
14,800
9,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
230V Single-Phase 60Hz
inch
187 to 253
Dimensions& Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
119.0
127.9
13.41
(54.0)
(58.0)
(0.38)
34-3/16 × 41-11/32 × 16-21/32
(868 × 1,050 × 423)
(298 × 1,065 × 219) (740 × 900 × 320)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 29-1/8 × 35-7/16 × 12-19/32
1/4 (6.35)
5/8 (15.88)
ft (m)Max. allowable tubing length at shipment
Flare Type
33 (10)
47 / 44 / 41 / 30
55
R410A / 4.30 (1,950)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hi and multi steps)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 99
A 17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 17
659 (1,120) / 571 (970) / 494 (839)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 9.8
Fuse or Circuit Breaker Capacity A 20
2,460 ( 280 to 2,460 )
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
13

Indoor UnitCS-KS24NKU
Outdoor UnitCU-KS24NKUA < 208V >
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Vertical
dB-A
dB-A
Indoor :Hi/Me/Lo/Qt*
Outdoor :Hi
Air Filter
Compressor
Refrigerant / Amount charged at shipment Ibs (g)
Refrigerant Control
12.1(1.3 to 12.1 )
24,200
7.1
( 4,000 to 24,200 )
( 1.2 to 7.1 )
Shipping Volume
Cooling
14,800
9,400
Net
Shipping
Package Dimensions
Weight
Height × Width × Depth
Height × Width × Depth
Ibs (kg)
Ibs (kg)
cu.ft (m3)
(mm)
inch
(mm)
208V Single-Phase 60Hz
inch
187 to 253
Dimensions & Weight
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Unit Dimensions
Operation Sound
Electrical Rating
Sensible Capacity
Latent Capacity
WPower Input
V
A
Available Voltage Range
Running Amperes
Refrigerant Tube Kit
Narrow tube
Wide tube
Refrigerant inch (mm)
Tube Diameter inch (mm)
26.5
33.1
(12.0)
(15.0)
119.0
127.9
13.41
(54.0)
(58.0)
(0.38)
34-3/16 × 41-11/32 × 16-21/32
(868 × 1,050 × 423)
(298 × 1,065 × 219) (740 × 900 × 320)
Outdoor UnitIndoor Unit
11-23/32 × 41-15/16 × 8-5/8 29-1/8 × 35-7/16 × 12-19/32
1/4 (6.35)
5/8 (15.88)
ft (m)Max.allowable tubing length at shipment
Flare Type
33 (10)
47 / 44 / 41 / 30
55
R410A / 4.30 (1,950)
Electric Expansion Valve
Washable, Anti-Mold
DC Twin Rotary (Inverter)
Manual
Auto
Timer
Indoor / OutdoorFan Speeds
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Auto and 3 steps / Auto (Hiand multisteps)
Airflow Direction (Indoor) Horizontal
Controls / Temperature Control
Control Unit
Microprocessor / I.C.Thermistor
Wireless Remote Control Unit
Features
Compressor Locked Rotor Amperes
Optional
BTU/h
Performance
%Power Factor 98
A17.5
Voltage Rating
BTU/h
kW
Total Capacity
BTU/h
SEER BTU/Wh 17
659 (1,120) / 571 (970) / 494 (839)Air Circulation (Hi/Me/Lo) ft3/min (m3/h)
4.89Moisture Removal (High) Pints/h
EER BTU/h/W 9.8
Fuse or Circuit Breaker Capacity A 20
2,460 ( 280 to 2,460 )
4.59 (0.13)
(301 × 1,146 × 385)
11-27/32 × 45-1/8 × 15-5/32
Remarks: Rating conditions are:
Cooling:Indoor air temperature 80 °F DB / 67 °F WB
Outdoor air temperature 95 °F DB / 75 °F WB
14

Indoor Unit CS-KS18NKU
MP24Z3
Flap Motor
Type Stepping Motor
Rating
Model
Coil Resistance Ohm
(Ambient Temp. 77 °F (25 °C))
Each Pair of Terminal : 400 +/- 7%
DC 12V
Aluminum Plate Fin / Copper Tube
2
19.5
3.07 (0.285)Face Area
Coil
Rows
Fins per inch
Heat Exchanger Coil
ft2(m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Yes
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 3A
CB-CS-KS18NKU
1 ... D3-5/8 / L33-9/32 (D92/L845)
Cross-Flow
DC Motor
SIC-41CVJ-D847-3 ... 1
8
30
-
1,250
Internal Controller
Yes
-
-
Fan
Q'ty ... Dia. and Length
Type
inch (mm)
Fan Motor
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
W
Ohm
2-2.Major Component Specifications
2-2-1.Indoor Unit
15

Indoor Unit CS-KS24NKU
MP24Z3
Flap Motor
Type Stepping Motor
Rating
Model
Coil Resistance Ohm
(Ambient Temp. 77 °F (25 °C))
Each Pair of Terminal : 400 +/- 7%
DC 12V
Aluminum Plate Fin / Copper Tube
2
19.5
3.07 (0.285)Face Area
Coil
Rows
Fins per inch
Heat Exchanger Coil
ft2(m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Yes
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 3A
CB-CS-KS24NKU
1 ... D3-5/8 / L33-9/32 (D92/L845)
Cross-Flow
DC Motor
SIC-41CVJ-D847-3 ... 1
8
30
-
1,500
Internal Controller
Yes
-
-
Fan
Q'ty ... Dia. and Length
Type
inch (mm)
Fan Motor
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
W
Ohm
16

Outdoor Unit CU-KS18NKU
2-2-2.Outdoor Unit
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 25A
CB-CU-KS18NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Pints (cc)
WHT - BLU :
BLU - RED :
RED - WHT :
77.5
77.5
77.5
Micro F
VAC
External FinishAcrylic baked-on enamel finish
FV50S ... 0.74 (350)
-
-
Internal Controller
Yes
Aluminum Plate Fin / Copper Tube
2
21.2
Face Area ft2(m2)5.49 (0.510)
Coil
Rows
Fins per inch
Heat Exchanger Coil
SIC-67FV-F460-1 ... 1
Compressor Oil ... Amount
8
50
820
Ohm
DC Motor
Type
Compressor Model / Nominal Output
Compressor
Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
U - V :
V - W :
W - U :
0.482
0.482
0.482
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC
Run Capacitor
Crankcase Heater
Yes
Yes
Yes
Overload Relay CS-7L115 Model
Operation Temp. Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
1 ... D16-17/32 (D420)
Fan
Propeller
Q'ty ... Dia. inch (mm)
Type
Type
Over- Current Protection
(Ambient Temp. 68 °F (20 °C))
Fan Motor
Nominal Output
Coil Resistance
Safety Device
Rough Measure RPM (Cool)
Run Capacitor
Type
Model ... Q'ty
No. of Poles
W
17

Outdoor Unit CU-KS24NKU
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 25A
CB-CU-KS24NKU
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Pints (cc)
-
Micro F
VAC
External FinishAcrylic baked-on enamel finish
FV50S ... 1.49 (700)
-
-
Internal Controller
Yes
Yes
Aluminum Plate Fin / Copper Tube
2
18.1
Face Area ft2(m2)6.40 (0.595)
Coil
Rows
Fins per inch
Heat Exchanger Coil
SIC-71FW-D490-1 ... 1
Compressor Oil ... Amount
8
90
850
Ohm
DC Motor
Type
Compressor Model / Nominal Output
Compressor
Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm
DC Twin Rotary (Hermetic)
G8T265FU1JW / 2,410W
U - V :
V - W :
W - U :
0.36
0.36
0.36
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC
Run Capacitor
Crankcase Heater
Yes
Yes
Yes
Overload Relay CS-7L115 Model
Operation Temp. Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
1 ... D18-1/8 (D460)
Fan
Propeller
Q'ty ... Dia. inch (mm)
Type
Type
Over-Current Protection
Over-Heat Protection
(Ambient Temp. 68 °F (20 °C))
Fan Motor
Nominal Output
Coil Resistance
Safety Device
Rough Measure RPM (Cool)
Run Capacitor
Type
Model ... Q'ty
No. of Poles
W
18

Outdoor Unit CU-KS18NKUA
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 25A
CB-CU-KS18NKUA
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Pints (cc)
WHT - BLU :
BLU - RED :
RED - WHT :
77.5
77.5
77.5
Micro F
VAC
External FinishAcrylic baked-on enamel finish
FV50S ... 0.74 (350)
-
-
Internal Controller
Yes
Aluminum Plate Fin / Copper Tube
2
21.2
Face Area ft2(m2)5.49 (0.510)
Coil
Rows
Fins per inch
Heat Exchanger Coil
SIC-67FV-F460-1 ... 1
Compressor Oil ... Amount
8
50
820
Ohm
DC Motor
Type
Compressor Model / Nominal Output
Compressor
Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
R - S :
S - T :
T - R :
0.482
0.482
0.482
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC
Run Capacitor
Crankcase Heater
Yes
Yes
Yes
Overload Relay CS-7L115 Model
Operation Temp. Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
-
1 ... D16-17/32 (D420)
Fan
Propeller
Q'ty ... Dia. inch (mm)
Type
Type
Over- Current Protection
(Ambient Temp. 68 °F (20 °C))
Fan Motor
Nominal Output
Coil Resistance
Safety Device
Rough Measure RPM (Cool)
Run Capacitor
Type
Model ... Q'ty
No. of Poles
W
19

Outdoor Unit CU-KS24NKUA
Control PCB
Control Circuit Fuse
Controls
Part No.
Microprocessor
250V 25A
CB-CU-KS24NKUA
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Pints (cc)
-
Micro F
VAC
External FinishAcrylic baked-on enamel finish
FV50S ... 1.49 (700)
-
-
Internal Controller
Yes
Yes
Aluminum Plate Fin / Copper Tube
2
18.1
Face Area ft2(m2)6.40 (0.595)
Coil
Rows
Fins per inch
Heat Exchanger Coil
SIC-71FW-D490-1 ... 1
Compressor Oil ... Amount
8
90
850
Ohm
DC Motor
Type
Compressor Model / Nominal Output
Compressor
Coil Resistance (Ambient Temp. 77 °F (25 °C)) Ohm
DC Twin Rotary (Hermetic)
G8T265FU1JW / 2,410W
U - V :
V - W :
W - U :
0.36
0.36
0.36
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Safety Device
Micro F
VAC
Run Capacitor
Crankcase Heater
Yes
Yes
Yes
Overload Relay CS-7L115 Model
Operation Temp. Open : 239 °F (115 °C), Close : 203 °F (95 °C)
-
-
230V 30W
1 ... D18-1/8 (D460)
Fan
Propeller
Q'ty ... Dia. inch (mm)
Type
Type
Over-Current Protection
Over-Heat Protection
(Ambient Temp. 68 °F (20 °C))
Fan Motor
Nominal Output
Coil Resistance
Safety Device
Rough Measure RPM (Cool)
Run Capacitor
Type
Model ... Q'ty
No. of Poles
W
20