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)
Product Code No.
Body (Panel)
Outdoor Model No. Product Code No.
1 852 361 18
1 852 361 16
1 852 361 19
CU-KS18NKU
CU-KS12NK1A
CU-KS18NKUA
CS-KS12NB41 (CZ-18BT1U)
1 852 361 04 (1 852 361 15)
CS-KS18NB4UW (CZ-18BT1U) 1 852 361 06 (1 852 361 15)
Indoor Unit
Outdoor Unit
Body
Panel
CS-KS12NB41 (Body) & CZ-18BT1U (Panel)
CS-KS18NB4UW (Body) & CZ-18BT1U (Panel)
CU-KS12NK1A
Remote Controller
CU-KS18NKU
CU-KS18NKUA
Wired Remote Controller
(Option)
REFERENCE NO. SM700879
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Warning
If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.
Prohibit
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."
Prohibit
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.
Prohibit
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.
Prohibit
Prohibit
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.
3
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Table of Contents
Page
2
SAFETY PRECAUTIONS ..............................................................................................................
TABLE OF CONTENTS .....................................................................................................................
1. OPERATING RANGE ...................................................................................................................
4
6
2. SPECIFICATIONS
2-1. Unit Specifications .............................................................................................................
7
2-2. Major Component Specifications ....................................................................................... 17
2-3. Other Component Specifications ....................................................................................... 22
3. DIMENSIONAL DATA..................................................................................................................... 23
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram ................................................................................................... 26
5. PERFORMANCE DATA
5-1. Temperature Charts ............................................................................................................ 28
5-2. Cooling Capacity ................................................................................................................ 30
5-3. Cooling Capacity (Low Ambient) ......................................................................................... 32
6. ELECTRICAL DATA
6-1. Electrical Characteristics .................................................................................................... 34
6-2. Electric Wiring Diagrams .................................................................................................... 36
7. MAINTENANCE
7-1. Address Setting of the Remote Control Unit ....................................................................... 39
7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit .................................. 40
7-3. Disassembly Procedure ...................................................................................................... 41
8. FUNCTIONS
8-1. Operation Functions ........................................................................................................... 48
8-2. Protective Functions ........................................................................................................... 50
9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
9-1. Precautions before Performing Inspection or Repair ........................................................... 51
9-2. Method of Self-Diagnostics ................................................................................................. 51
9-3. Checking the Indoor and Outdoor Units .............................................................................. 53
9-4. Trouble Diagnosis of Fan Motor ........................................................................................... 57
9-5. Noise Malfunction and Electromagnetic Interference .......................................................... 59
4
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Page
10. CHECKING ELECTRICAL COMPONENTS
10-1. Measurement of Insulation Resistance ............................................................................... 60
10-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 61
11. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1. Characteristics of New Refrigerant R410A ......................................................................... 62
11-2. Checklist before Servicing ................................................................................................... 63
11-3. Tools Specifically for R410A ................................................................................................ 64
11-4. Tubing Installation Procedures ............................................................................................ 64
11-5. In Case of Compressor Malfunction .................................................................................... 65
11-6. In Case Refrigerant is Leaking ............................................................................................ 67
11-7. Charging Additional Refrigerant .......................................................................................... 68
11-8. Retro-Fitting Existing Systems ............................................................................................ 68
APPENDIX A Operating Instructions ............................................................................................ A-1
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
(
)
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
APPENDIX B INSTALLATION INSTRUCTIONS ............................................................................. A-2
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
(
)
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
APPENDIX C Operating Instructions ............................................................................................ A-3
(CZ-RD515U)
APPENDIX D INSTALLATION INSTRUCTIONS ............................................................................. A-4
(CZ-RD515U)
5
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1. OPERATING RANGE
Models : CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
Temperature
Maximum
Indoor Air Intake Temp.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
Outdoor Air Intake Temp.
115 °F DB
Cooling
Minimum
67 °F DB
Models : CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
Temperature
Maximum
Indoor Air Intake Temp.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
Outdoor Air Intake Temp.
115 °F DB
Cooling
Minimum
0 °F DB
6
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2. SPECIFICATIONS
2-1. Unit Specifications
Indoor Unit
Outdoor Unit CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U
2-1-1.
< 230V >
Voltage Rating
230V Single-Phase 60Hz
Cooling
17,500 ( 4,000 to 17,500 )
5.15 ( 1.2 to 5.15 )
10,600
Total Capacity
BTU/h
kW
Sensible Capacity
Latent Capacity
BTU/h
BTU/h
ft3/min (m3/h)
Pints/h
6,900
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Available Voltage Range
Running Amperes
Power Input
341 (579) / 294 (500) / 253 (430)
4.89
V
A
W
187 to 253
8.3
( 1.2 to 8.3 )
1,860 ( 250 to 1,860 )
Power Factor
EER
SEER
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
Controls / Temperature Control
Control Unit
%
BTU/h/W
BTU/Wh
A
97
9.41
16
17.5
A
15
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor)
-
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Ibs (g)
Operation Sound
Indoor : Hi/Me/Lo
Outdoor : Hi
dB-A
dB-A
51
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
1/2 (12.7)
Wired Remote Controller (Option)
CZ-RD515U
7
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
< 230V >
Individual Unit
Body Panel
(CS-KS18NB4UW) (CZ-18BT1U)
11-5/32 (283) 1-9/16 (40)
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
Dimensions & Weight (Indoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
12-5/16 (313)
inch (mm)
inch (mm)
inch (mm)
24-19/32 (625)
24-19/32 (625)
-
22-5/8 (575) 24-19/32 (625)
22-5/8 (575) 24-19/32 (625)
11-13/32 (290) 4-1/8 (105)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
-
-
24-13/16 (630) 26-3/16 (665)
28-1/8 (714) 26-11/16 (678)
Weight
41.3 (18.7)
-
35.3 (16)
41.9 (19)
6.0 (2.7)
7.7 (3.5)
Shipping
Ib. (kg)
cu.ft (m3)
-
4.59 (0.13)
1.65 (0.04)
Shipping Volume
Outdoor Unit
(CU-KS18NKU)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
26-3/8 (670)
inch (mm)
inch (mm)
inch (mm)
34-21/32 (880)
11-7/32 (285)
28-27/32 (733)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
39-27/32 (1,012)
14-29/32 (379)
90.4 (41.0)
Weight
Shipping
Ib. (kg)
cu.ft (m3)
99.2 (45.0)
Shipping Volume
9.88 (0.28)
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
8
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Indoor Unit
Outdoor Unit CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U
2-1-2.
< 208V >
Voltage Rating
208V Single-Phase 60Hz
Cooling
17,500 ( 4,000 to 17,500 )
5.15 ( 1.2 to 5.15 )
10,600
Total Capacity
BTU/h
kW
Sensible Capacity
Latent Capacity
BTU/h
BTU/h
ft3/min (m3/h)
Pints/h
6,900
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Available Voltage Range
Running Amperes
Power Input
341 (579) / 294 (500) / 253 (430)
4.89
V
A
W
187 to 253
9.1
( 1.2 to 9.1 )
1,860 ( 250 to 1,860 )
Power Factor
EER
SEER
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
Controls / Temperature Control
Control Unit
%
BTU/h/W
BTU/Wh
A
98
9.41
16
17.5
A
15
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi, Me, Lo)
Airflow Direction (Indoor)
-
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Ibs (g)
Operation Sound
Indoor : Hi/Me/Lo
Outdoor : Hi
dB-A
dB-A
51
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
1/2 (12.7)
Wired Remote Controller (Option)
CZ-RD515U
9
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
< 208V >
Individual Unit
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
Dimensions & Weight (Indoor Unit)
Body Panel
(CS-KS18NB4UW) (CZ-18BT1U)
Unit Dimensions
Height
Width
Depth
inch (mm)
12-5/16 (313)
11-5/32 (283)
1-9/16 (40)
inch (mm)
inch (mm)
inch (mm)
24-19/32 (625)
24-19/32 (625)
-
22-5/8 (575) 24-19/32 (625)
22-5/8 (575) 24-19/32 (625)
11-13/32 (290) 4-1/8 (105)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
-
-
24-13/16 (630) 26-3/16 (665)
28-1/8 (714) 26-11/16 (678)
Weight
41.3 (18.7)
-
35.3 (16)
41.9 (19)
6.0 (2.7)
7.7 (3.5)
Shipping
Ib. (kg)
cu.ft (m3)
-
4.59 (0.13)
1.65 (0.04)
Shipping Volume
Outdoor Unit
(CU-KS18NKU)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
26-3/8 (670)
inch (mm)
inch (mm)
inch (mm)
34-21/32 (880)
11-7/32 (285)
28-27/32 (733)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
39-27/32 (1,012)
14-29/32 (379)
90.4 (41.0)
Weight
Shipping
Ib. (kg)
cu.ft (m3)
99.2 (45.0)
Shipping Volume
9.88 (0.28)
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
10
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Indoor Unit
Outdoor Unit CU-KS12NK1A
CS-KS12NB41 & CZ-18BT1U
2-1-3.
Voltage Rating
115V Single-Phase 60Hz
Cooling
Total Capacity
BTU/h
kW
11,900 ( 3,000 to 11,900 )
3.5
( 0.9 to 3.5 )
7,200
Sensible Capacity
Latent Capacity
BTU/h
BTU/h
ft3/min (m3/h)
Pints/h
4,700
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Available Voltage Range
Running Amperes
Power Input
235 (399) / 206 (350) / 194 (330)
4.26
104 to 126
12.6 ( 2.5 to 12.6 )
1,260 ( 250 to 1,260 )
V
A
W
Power Factor
EER
SEER
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
Controls / Temperature Control
Control Unit
%
BTU/h/W
BTU/Wh
A
87
9.44
16
20
A
20
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Airflow Direction (Indoor)
-
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Washable, Anti-Mold
DC Rotary (Inverter)
R410A / 2.43 (1,100)
Electric Expansion Valve
34 / 32 / 31
Ibs (g)
Operation Sound
Indoor : Hi/Me/Lo
Outdoor : Hi
dB-A
dB-A
47
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
3/8 (9.52)
Wired Remote Controller (Option)
CZ-RD515U
11
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Indoor Unit
CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Individual Unit
Body Panel
(CS-KS12NB41) (CZ-18BT1U)
11-5/32 (283) 1-9/16 (40)
Indoor Unit
(CS-KS12NB41 & CZ-18BT1U)
Dimensions & Weight (Indoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
12-5/16 (313)
inch (mm)
inch (mm)
inch (mm)
24-19/32 (625)
24-19/32 (625)
-
22-5/8 (575) 24-19/32 (625)
22-5/8 (575) 24-19/32 (625)
11-13/32 (290) 4-1/8 (105)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
-
-
24-13/16 (630) 26-3/16 (665)
28-1/8 (714) 26-11/16 (678)
Weight
41.3 (18.7)
-
35.3 (16)
41.9 (19)
6.0 (2.7)
7.7 (3.5)
Shipping
Ib. (kg)
cu.ft (m3)
-
4.59 (0.13)
1.65 (0.04)
Shipping Volume
Outdoor Unit
(CU-KS12NK1A)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
21-9/16 (548)
inch (mm)
inch (mm)
inch (mm)
28-11/32 (720)
10-7/16 (265)
23-15/32 (596)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
34-3/32 (866)
14-1/2 (368)
75.0 (34.0)
81.6 (37.0)
Weight
Shipping
Ib. (kg)
cu.ft (m3)
6.35 (0.18)
Shipping Volume
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
12
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Indoor Unit
Outdoor Unit CU-KS18NKUA
CS-KS18NB4UW & CZ-18BT1U
2-1-4.
< 230V >
Voltage Rating
230V Single-Phase 60Hz
Cooling
17,500 ( 4,000 to 17,500 )
5.15 ( 1.2 to 5.15 )
10,600
Total Capacity
BTU/h
kW
Sensible Capacity
Latent Capacity
BTU/h
BTU/h
ft3/min (m3/h)
Pints/h
6,900
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Available Voltage Range
Running Amperes
Power Input
341 (579) / 294 (500) / 253 (430)
4.89
V
A
W
187 to 253
8.3
( 1.2 to 8.3 )
1,860 ( 250 to 1,860 )
Power Factor
EER
SEER
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
Controls / Temperature Control
Control Unit
%
BTU/h/W
BTU/Wh
A
97
9.41
16
17.5
A
15
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Airflow Direction (Indoor)
-
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Ibs (g)
Operation Sound
Indoor : Hi/Me/Lo
Outdoor : Hi
dB-A
dB-A
51
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
1/2 (12.7)
Wired Remote Controller (Option)
CZ-RD515U
13
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
< 230V >
Individual Unit
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
Dimensions & Weight (Indoor Unit)
Body Panel
(CS-KS18NB4UW) (CZ-18BT1U)
Unit Dimensions
Height
Width
Depth
inch (mm)
12-5/16 (313)
11-5/32 (283)
1-9/16 (40)
inch (mm)
inch (mm)
inch (mm)
24-19/32 (625)
24-19/32 (625)
-
22-5/8 (575) 24-19/32 (625)
22-5/8 (575) 24-19/32 (625)
11-13/32 (290) 4-1/8 (105)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
-
-
24-13/16 (630) 26-3/16 (665)
28-1/8 (714) 26-11/16 (678)
Weight
41.3 (18.7)
-
35.3 (16)
41.9 (19)
6.0 (2.7)
7.7 (3.5)
Shipping
Ib. (kg)
cu.ft (m3)
-
4.59 (0.13)
1.65 (0.04)
Shipping Volume
Outdoor Unit
(CU-KS18NKUA)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
26-3/8 (670)
inch (mm)
inch (mm)
inch (mm)
34-21/32 (880)
11-7/32 (285)
28-27/32 (733)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
39-27/32 (1,012)
14-29/32 (379)
90.4 (41.0)
Weight
Shipping
Ib. (kg)
cu.ft (m3)
99.2 (45.0)
Shipping Volume
9.88 (0.28)
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
14
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Indoor Unit
Outdoor Unit CU-KS18NKUA
CS-KS18NB4UW & CZ-18BT1U
2-1-5.
< 208V >
Voltage Rating
208V Single-Phase 60Hz
Cooling
17,500 ( 4,000 to 17,500 )
5.15 ( 1.2 to 5.15 )
10,600
Total Capacity
BTU/h
kW
Sensible Capacity
Latent Capacity
BTU/h
BTU/h
ft3/min (m3/h)
6,900
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Available Voltage Range
Running Amperes
Power Input
341 (579) / 294 (500) / 253 (430)
4.89
Pints/h
V
A
W
187 to 253
9.1
( 1.2 to 9.1 )
1,860 ( 250 to 1,860 )
Power Factor
EER
SEER
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
Controls / Temperature Control
Control Unit
%
BTU/h/W
BTU/Wh
A
98
9.41
16
17.5
A
15
Microprocessor / I.C. Thermister
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Airflow Direction (Indoor)
-
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1,300)
Electric Expansion Valve
44 / 40 / 36
Ibs (g)
Operation Sound
Indoor : Hi/Me/Lo
Outdoor : Hi
dB-A
dB-A
51
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
1/2 (12.7)
Wired Remote Controller (Option)
CZ-RD515U
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
< 208V >
Individual Unit
Indoor Unit
(CS-KS18NB4UW & CZ-18BT1U)
Dimensions & Weight (Indoor Unit)
Body Panel
(CS-KS18NB4UW) (CZ-18BT1U)
Unit Dimensions
Height
Width
Depth
inch (mm)
12-5/16 (313)
11-5/32 (283)
1-9/16 (40)
inch (mm)
inch (mm)
inch (mm)
24-19/32 (625)
24-19/32 (625)
-
22-5/8 (575) 24-19/32 (625)
22-5/8 (575) 24-19/32 (625)
11-13/32 (290) 4-1/8 (105)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
-
-
24-13/16 (630) 26-3/16 (665)
28-1/8 (714) 26-11/16 (678)
Weight
41.3 (18.7)
-
35.3 (16)
41.9 (19)
6.0 (2.7)
7.7 (3.5)
Shipping
Ib. (kg)
cu.ft (m3)
-
4.59 (0.13)
1.65 (0.04)
Shipping Volume
Outdoor Unit
(CU-KS18NKUA)
Dimensions & Weight (Outdoor Unit)
Unit Dimensions
Height
Width
Depth
inch (mm)
26-3/8 (670)
inch (mm)
inch (mm)
inch (mm)
34-21/32 (880)
11-7/32 (285)
28-27/32 (733)
Package Dimensions Height
Width
Depth
Net
inch (mm)
inch (mm)
Ib. (kg)
39-27/32 (1,012)
14-29/32 (379)
90.4 (41.0)
Weight
Shipping
Ib. (kg)
cu.ft (m3)
99.2 (45.0)
Shipping Volume
9.88 (0.28)
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
16
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2-2. Major Component Specifications
2-2-1. Indoor Unit
Indoor Unit (Body) CS-KS12NB41
Control PCB
Part No.
Controls
CB-CS-KS12NB4U
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Turbo
Q'ty ... Dia. and Length
inch (mm)
1 ... D12-5/8 / L5-3/4 (D322/L147)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-62FW-D866-2 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
470
Rating
Coil Resistance
Voltage / Nominal Output
DC160V / 23W
-
Ohm
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Internal Controller
Over- Current Protection
Over- Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Drain Pump
Model ... Q'ty
Rating
PLD-12115ST-1 ... 1
AC115V, 60Hz
10.8
Voltage, Hz
Input
W
Coil Resistance
101 +/- 10%
Ohm
(Ambient Temp. 68 °F (20 °C))
Safty Device
Type
Open
Thermal Fuse
293 (145)
°F (°C)
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
18.1
2.94 (0.273)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Indoor Unit (Panel) CZ-18BT1U
Flap Motor
Type
Stepping Motor
MP24ZN-12V ... 2
Model ... Q'ty
Rating
DC 12V
Coil Resistance
(Ambient Temp. 77 °F (25 °C))
Ohm
Each Pair of Terminal : 380 +/- 7%
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
17
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Indoor Unit (Body) CS-KS18NB4UW
Control PCB
Part No.
Controls
CB-CS-KS18NB4U
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Turbo
Q'ty ... Dia. and Length
inch (mm)
1 ... D12-5/8 / L5-3/4 (D322/L147)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-62FW-D866-2 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
650
Rating
Coil Resistance
Voltage / Nominal Output
DC340V / 20W
-
Ohm
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Internal Controller
Over- Current Protection
Over- Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Drain Pump
Model ... Q'ty
Rating
PLD-12230ST-1 ... 1
AC208 to 240V, 60Hz
10.8
Voltage, Hz
Input
W
Coil Resistance
333 +/- 10%
Ohm
(Ambient Temp. 68 °F (20 °C))
Safty Device
Type
Open
Thermal Fuse
293 (145)
°F (°C)
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
18.1
2.94 (0.273)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Indoor Unit (Panel) CZ-18BT1U
Flap Motor
Type
Stepping Motor
MP24ZN-12V ... 2
Model ... Q'ty
Rating
DC 12V
Coil Resistance
(Ambient Temp. 77 °F (25 °C))
Ohm
Each Pair of Terminal : 380 +/- 7%
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
18
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2-2-2. Outdoor Unit
Outdoor Unit CU-KS18NKU
Control PCB
Part No.
Controls
CB-CU-KS18NKU
Microprocessor
250V 25A
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S : 0.482
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm
Pints (cc)
S - T : 0.482
T - R : 0.482
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
Run Capacitor
-
-
-
VAC
Crankcase Heater
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D16-17/32 (D420)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-67FV-F460-1 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
Nominal Output
820
50
W
Coil Resistance
Ohm
RED - WHT : 77.5
WHT - BLU : 77.5
BLU - RED : 77.5
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Internal Controller
Over- Current Protection
Run Capacitor
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
21.2
ft2 (m2)
5.49 (0.510)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
19
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Outdoor Unit CU-KS12NK1A
Control PCB
Part No.
Controls
CB-CU-KS12NK1A
Microprocessor
125V 25A
Control Circuit Fuse
Compressor
Type
DC Rotary (Hermetic)
G4C090LU1ER / 900W
FV50S ... 0.68 (320)
U - V : 0.81
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm
Pints (cc)
V - W : 0.81
W - U : 0.81
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
Run Capacitor
-
VAC
-
Crankcase Heater
115V 20W
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D15-3/4 (D400)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-67FV-F460-1 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
Nominal Output
750
50
W
Coil Resistance
Ohm
RED - WHT : 77.5
WHT - BLU : 77.5
BLU - RED : 77.5
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Internal Controller
Over- Current Protection
Run Capacitor
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
18.1
ft2 (m2)
3.95 (0.367)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
20
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Outdoor Unit CU-KS18NKUA
Control PCB
Part No.
Controls
CB-CU-KS18NKUA
Microprocessor
250V 25A
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S : 0.482
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 °F (20 °C)) Ohm
Pints (cc)
S - T : 0.482
T - R : 0.482
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
Open : 239 °F (115 °C), Close : 203 °F (95 °C)
Run Capacitor
-
-
-
VAC
Crankcase Heater
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D16-17/32 (D420)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-67FV-F460-1 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
Nominal Output
820
50
W
Coil Resistance
Ohm
RED - WHT : 77.5
WHT - BLU : 77.5
BLU - RED : 77.5
(Ambient Temp. 68 °F (20 °C))
Safety Device
Type
Internal Controller
Over- Current Protection
Run Capacitor
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
21.2
ft2 (m2)
5.49 (0.510)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
21
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2-3. Other Component Specifications
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
CU-KS12NK1A CU-KS18NKUA
• Indoor heat exchanger sensor
(Model:PT2M-51H-S3)
• Compressor temp sensor
(CU-KS12NK1A Model:DTN-TKS274Y TH2)
(CU-KS18NKU , CU-KS18NKUA Model:DTN-TKS293B)
...
• Indoor air temp sensor
(Model:KTEC-35-S98)
...
10
9
8
7
6
5
4
3
2
1
0
200
180
160
140
120
100
80
60
40
20
0
50
59 68 77 86 95 104
32 50 68 86 104 122 140 158 176 194
(0) (10)(20) (30) (40)(50) (60) (70)(80) (90)
(10) (15) (20) (25) (30) (35) (40)
Temperature °F (°C)
Temperature °F (°C)
• Outdoor air temp sensor
...
(CU-KS12NK1A Model:DTN-TKS269B)
...
(CU-KS18NKU , CU-KS18NKUA Model:TKS295B)
• Outdoor heat exchanger sensor
...
(CU-KS12NK1A Model:DTN-TKS274Y TH1)
...
(CU-KS18NKU , CU-KS18NKUA Model:TKS292B)
40
35
30
25
20
15
10
5
0
-
4
5
14 23 32 41 50 59 68
10) ( 5) (0) (5) (10) (15) (20)
Temperature °F (°C)
(
-
20)(
-
15)(
-
-
22
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3. DIMENSIONAL DATA
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
1 - 3 / 1 6
7 - 1 1 / 1 6
2 1 / 3 2
3 - 1 / 8
C e i l i n g o p e n i n g d i m e n s i o n s
2 3 - 5 / 8 ( 6 0 0 )
S u s p e n s i o n b o l t p i t c h
1 1 - 5 / 3 2 1 ( - 3 2 / 1 8 6 ( 3 3 0 ) )
8 - 1 5 / 3 2
2 4 - 1 9 / 3 2 ( 6 2 5 )
1 3 - 5 / 3 2 ( 3 3 4 )
2 1 - 1 / 3 2 ( 5 3 4 )
1 2 - 7 / 1 6
1 - 2 5 / 3 2
4 - 1 9 / 3 2
1 2 - 7 / 8
1 - 2 5 / 3 2
5 - 9 / 1 6
1 - 9 / 3 2 2 - 3 / 4
3 - 5 / 8
7 - 2 3 / 3 2
Unit : inch (mm)
23
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Outdoor Unit CU-KS12NK1A
21-3/16
3-19/32
15/32
10-13/16
Wide tube service valve
dia.3/8" (9.52)
28-11/32 (720)
2-1/8
Narrow tube service valve
dia.1/4" (6.35)
6-3/32
Unit : inch (mm)
(852-0-0010-12600-0)
24
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Outdoor Unit CU-KS18NKU
CU-KS18NKUA
23-15/16
5-11/32
15/32
11-17/32
Wide tube service valve
dia.1/2" (12.70)
34-21/32 (880)
2-17/32
Narrow tube service valve
dia.1/4" (6.35)
3/32
5-23/32
1-13/16
2-13/32
Unit : inch (mm)
(852-0-0010-13300-0)
25
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4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Indoor unit
Outdoor unit
Wide tube
service
valve
Wide tube
Accumulator
Muffler
O.D.
High pressure
3/8"
(9.52 mm)
switch
H.P.
Electric
expansion
valve
Narrow
tube
service
valve
M
Narrow tube
Muffler
O.D.
1/4"
(6.35 mm)
Cooling cycle
26
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU
CU-KS18NKUA
Indoor unit
Outdoor unit
Wide tube
service
valve
Wide tube
Accumulator
Muffler
O.D.
1/2"
High pressure
(12.7mm)
switch
H.P.
Electric
expansion
valve
Narrow
tube
service
valve
M
Narrow tube
O.D.
1/4"
(6.35 mm)
Cooling cycle
27
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5. PERFORMANCE DATA
5-1. Temperature Charts
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
Outdoor Unit
CU-KS12NK1A
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) Low pressure performance chart
Lo Fan
Hi Fan
131
(0.9)
102
(0.7)
73
(0.5)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
(2) Operating current performance chart
15
Lo Fan
Hi Fan
14
13
12
11
10
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
(3) Indoor discharge air performance chart
68
(20)
Lo Fan
Hi Fan
59
(15)
50
(10)
41
(5)
32
(0)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
28
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit
CU-KS18NKU or CU-KS18NKUA
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)
(1) Low pressure performance chart
Lo Fan
Hi Fan
131
(0.9)
102
(0.7)
73
(0.5)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
(2) Operating current performance chart
10
Lo Fan
Hi Fan
9
8
7
6
5
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
(3) Indoor discharge air performance chart
68
(20)
Lo Fan
Hi Fan
59
(15)
50
(10)
41
(5)
32
(0)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air DB temp. °F(°C)
NOTE
• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
29
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5-2. Cooling Capacity
Indoor Unit
: CS-KS12NB41 & CZ-18BT1U
Outdoor Unit : CU-KS12NK1A
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity >
RATING CAPACITY:
11,900 BTU/h
AIR FLOW RATE:
OUTDOOR
AMBIENT TEMP. oF (oC)
235 CFM
INDOOR
ENT. TEMP. oF (oC)
WB
DB
65
75
85
95
105
115
(18.3)
(23.9)
(29.4)
(35.0)
(40.6)
(46.1)
TC
CI
8,350
0.79
8,570
0.93
8,800
1.06
8,930
1.16
9,210
1.25
7,830
1.07
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
6,340
7,210
8,120
8,350
8,350
6,430
7,300
8,210
8,570
8,570
6,570
7,440
8,350
8,800
8,800
6,610
7,480
8,400
8,930
8,930
6,800
7,660
8,530
9,210
9,210
6,060
6,930
7,830
7,830
7,830
59
(15.0)
TC
CI
12,230
0.80
12,030
0.94
11,790
1.08
11,580
1.18
10,580
1.25
7,950
1.07
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
7,070
7,940
8,850
9,720
10,590
6,930
7,800
8,720
9,590
10,450
6,840
7,710
8,580
9,450
10,360
6,700
7,570
8,490
9,360
10,230
6,200
7,070
7,980
8,850
9,720
4,970
5,840
6,750
7,620
7,950
63
(17.2)
TC
CI
12,460
0.82
12,290
0.96
12,070
1.10
# 11,900
1.20
10,700
1.25
8,040
1.07
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
5,790
6,660
7,570
8,440
9,310
5,700
6,570
7,480
8,350
9,220
5,610
6,480
7,390
8,260
9,130
5,520
6,380
7,300
8,170
9,040
4,970
5,880
6,750
7,620
8,490
3,870
4,740
5,650
6,520
7,390
67
(19.4)
TC
CI
12,640
0.84
12,490
0.98
12,300
1.13
12,170
1.22
10,770
1.25
8,100
1.07
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
4,460
5,330
6,250
7,120
7,980
4,420
5,290
6,200
7,070
7,940
4,330
5,200
6,110
6,980
7,850
4,280
5,150
6,060
6,930
7,800
3,690
4,560
5,470
6,340
7,210
2,680
3,550
4,460
5,330
6,200
71
(21.7)
TC
CI
12,730
0.86
12,610
1.01
12,450
1.15
12,370
1.25
10,780
1.25
8,120
1.07
75
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
4,050
4,970
5,840
6,700
4,010
4,920
5,790
6,660
3,960
4,880
5,740
6,610
3,920
4,830
5,700
6,570
3,370
4,280
5,150
6,020
2,450
3,370
4,240
5,100
(23.9)
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
NOTE
1.
Rating conditions (#) : Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
: Outdoor Ambient Temp. 95 °F (35 °C) DB
2.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.
30
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Indoor Unit
: CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit : CU-KS18NKU or CU-KS18NKUA
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity >
RATING CAPACITY:
17,500 BTU/h
65
AIR FLOW RATE:
OUTDOOR
AMBIENT TEMP. oF (oC)
341 CFM
INDOOR
ENT. TEMP. oF (oC)
WB
DB
75
85
95
105
115
(18.3)
(23.9)
(29.4)
(35.0)
(40.6)
(46.1)
TC
CI
12,260
1.15
12,550
1.34
12,830
1.54
13,060
1.72
13,460
1.67
9,520
1.30
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
9,140
10,330
11,590
12,260
12,260
9,270
10,470
11,720
12,550
12,550
9,400
10,600
11,860
12,830
12,830
9,540
9,740
10,930
12,190
13,380
13,460
7,810
9,010
9,520
9,520
9,520
59
10,730
11,990
13,060
13,060
(15.0)
TC
CI
18,110
1.17
17,790
1.37
17,400
1.57
17,000
1.75
14,080
1.67
9,650
1.30
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
10,400
11,590
12,850
14,040
15,240
10,200
11,390
12,650
13,850
15,110
10,000
11,190
12,450
13,650
14,840
9,800
8,340
9,540
10,800
11,990
13,180
6,290
7,480
8,740
9,650
9,650
63
11,000
12,260
13,450
14,640
(17.2)
TC
CI
18,510
1.19
18,220
1.40
17,860
1.60
# 17,500
1.79
14,220
1.67
9,750
1.30
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
8,680
9,870
11,130
12,320
13,510
8,480
9,740
10,930
12,190
13,380
8,340
9,540
10,800
11,990
13,180
8,140
6,620
7,880
9,070
10,330
11,530
4,830
6,020
7,280
8,480
9,670
67
9,340
(19.4)
10,600
11,790
12,980
TC
CI
18,820
1.22
18,570
1.43
18,260
1.64
17,940
1.83
14,290
1.67
9,810
1.30
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
6,750
7,950
9,210
10,470
11,660
6,690
7,880
9,140
10,330
11,530
6,550
7,750
9,010
10,200
11,390
6,420
7,610
8,870
10,070
11,260
4,900
6,090
7,350
8,540
9,740
3,240
4,430
5,690
6,890
8,080
71
(21.7)
TC
CI
19,010
1.25
18,800
1.46
18,530
1.68
18,260
1.87
14,280
1.67
9,810
1.30
75
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
6,160
7,420
8,610
9,800
6,090
7,350
8,540
9,740
5,960
7,220
8,410
9,670
5,890
7,150
8,340
9,540
4,430
5,690
6,890
8,080
2,970
4,230
5,430
6,620
(23.9)
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
NOTE
1.
Rating conditions (#) : Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
: Outdoor Ambient Temp. 95 °F (35 °C) DB
2.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
3. Above data represents the value when the operation frequency of a compressor is fixed.
31
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5-3. Cooling Capacity (Low Ambient)
Indoor Unit
: CS-KS12NB41 & CZ-18BT1U
Outdoor Unit : CU-KS12NK1A
Power Supply : 115V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
RATING CAPACITY:
11,900 BTU/h
AIR FLOW RATE:
235 CFM
INDOOR
OUTDOOR
ENT. TEMP. oF (oC)
AMBIENT TEMP. oF (oC)
WB
DB
0
5
15
25
35
45
55
(-17.8)
9,530
0.47
(-15.0)
(-9.4)
(-3.9)
(1.7)
(7.2)
(12.8)
TC
CI
9,550
0.50
9,560
0.47
9,590
0.46
9,600
0.46
9,590
0.51
9,570
0.55
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
6,930
7,800
8,720
9,530
9,530
6,930
7,800
8,720
9,550
9,550
6,980
7,850
8,720
9,560
9,560
8,580
9,450
9,590
9,590
9,590
6,980
7,850
8,760
9,600
9,600
6,980
7,850
8,760
9,590
9,590
6,980
7,850
8,760
9,570
9,570
59
(15.0)
TC
CI
9,440
0.53
9,460
0.56
9,530
0.51
9,590
0.49
9,650
0.49
9,660
0.53
9,670
0.57
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
5,650
6,520
7,440
8,300
9,170
5,650
6,520
7,440
8,300
9,170
5,700
6,570
7,480
8,350
9,220
8,580
9,450
9,590
9,590
9,590
5,740
6,610
7,530
8,400
9,270
5,740
6,610
7,530
8,400
9,270
5,790
6,660
7,530
8,400
9,270
63
(17.2)
TC
CI
9,250
0.61
9,290
0.63
9,410
0.57
9,530
0.54
9,620
0.52
9,670
0.56
9,720
0.59
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
4,370
5,240
6,160
7,020
7,890
4,370
5,240
6,160
7,020
7,890
4,420
5,290
6,200
7,070
7,940
8,580
9,450
9,530
9,530
9,530
4,510
5,380
6,290
7,160
8,030
4,560
5,420
6,340
7,210
8,080
4,560
5,420
6,340
7,210
8,080
67
(19.4)
TC
CI
8,950
0.68
9,010
0.71
9,210
0.63
9,380
0.58
9,520
0.56
9,610
0.60
9,710
0.62
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
3,000
3,870
4,780
5,650
6,520
3,050
3,920
4,830
5,700
6,570
3,090
3,960
4,880
5,740
6,610
8,580
9,380
9,380
9,380
9,380
3,230
4,100
5,010
5,880
6,750
3,280
4,140
5,060
5,930
6,800
3,280
4,140
5,060
5,930
6,800
71
(21.7)
TC
CI
8,590
0.76
8,650
0.79
8,930
0.69
9,160
0.63
9,360
0.60
9,480
0.63
9,620
0.64
75
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
2,590
3,500
4,370
5,240
2,640
3,550
4,420
5,290
2,730
3,640
4,510
5,380
9,160
9,160
9,160
9,160
2,860
3,780
4,650
5,520
2,910
3,820
4,690
5,560
2,960
3,870
4,740
5,610
(23.9)
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
NOTE
1.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
2. Above data represents the value when the operation frequency of a compressor is fixed.
32
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Indoor Unit
: CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit : CU-KS18NKUA
Power Supply : 230V Single Phase 60Hz
< Cooling Capacity (Low Ambient) >
RATING CAPACITY:
17,500 BTU/h
AIR FLOW RATE:
341 CFM
INDOOR
OUTDOOR
ENT. TEMP. oF (oC)
AMBIENT TEMP. oF (oC)
WB
DB
0
5
15
25
35
45
55
(-17.8)
(-15.0)
(-9.4)
(-3.9)
(1.7)
(7.2)
(12.8)
TC
CI
13,400
0.69
13,430
0.73
13,440
0.76
13,470
0.66
13,500
0.66
13,520
0.66
13,510
0.70
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
9,740
10,930
12,190
13,380
13,400
9,740
10,930
12,190
13,380
13,430
9,740
10,930
12,190
13,380
13,440
11,860
13,050
13,470
13,470
13,470
9,740
11,000
12,190
13,380
13,500
9,800
11,000
12,260
13,450
13,520
9,800
11,000
12,190
13,450
13,510
59
(15.0)
TC
CI
13,260
0.78
13,300
0.82
13,370
0.84
13,480
0.71
13,560
0.70
13,640
0.69
13,670
0.72
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
7,950
9,140
10,400
11,590
12,790
7,950
9,140
10,400
11,590
12,790
7,950
9,210
10,400
11,590
12,850
11,860
13,050
13,480
13,480
13,480
8,080
9,270
10,530
11,720
12,920
8,080
9,270
10,530
11,720
12,980
8,140
9,340
10,600
11,790
12,980
63
(17.2)
TC
CI
12,980
0.89
13,040
0.92
13,170
0.93
13,380
0.78
13,530
0.75
13,670
0.72
13,760
0.75
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
6,090
7,280
8,540
9,740
11,000
6,160
7,350
8,610
9,800
11,000
6,220
7,420
8,680
9,870
11,060
11,860
13,050
13,380
13,380
13,380
6,360
7,550
8,810
10,000
11,190
6,420
7,610
8,870
10,070
11,260
6,420
7,680
8,870
10,070
11,330
67
(19.4)
TC
CI
12,550
1.00
12,630
1.03
12,830
1.03
13,160
0.85
13,390
0.80
13,600
0.76
13,750
0.77
72 (22.2) SHC
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
4,230
5,430
6,690
7,880
9,070
4,230
5,490
6,690
7,950
9,140
4,370
5,560
6,820
8,010
9,210
11,860
13,050
13,160
13,160
13,160
4,570
5,760
7,020
8,210
9,400
4,630
5,820
7,080
8,280
9,470
4,700
5,890
7,150
8,340
9,540
71
(21.7)
TC
CI
12,010
1.11
12,110
1.14
12,380
1.13
12,850
0.92
13,150
0.86
13,440
0.80
13,650
0.80
75
76 (24.4) SHC
80 (26.7) SHC
84 (28.9) SHC
88 (31.1) SHC
3,640
4,900
6,090
7,280
3,700
4,960
6,160
7,350
3,770
5,030
6,220
7,420
12,850
12,850
12,850
12,850
4,030
5,290
6,490
7,680
4,170
5,360
6,620
7,810
4,230
5,490
6,690
7,880
(23.9)
TC : Total Cooling Capacity (BTU/h) SHC : Sensible Heat Capacity (BTU/h)
NOTE
1.
Above data does not take Freeze Prevention Protection during cooling operation into account.
For this reason, the value may vary from the actual cooling characteristics.
2. Above data represents the value when the operation frequency of a compressor is fixed.
33
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6. ELECTRICAL DATA
6-1. Electrical Characteristics
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
Outdoor Unit CU-KS12NK1A
Cooling
Indoor Unit
Fan Motor
Outdoor Unit
Fan Motor + Compressor
115V Single-phase 60Hz
12.39
Complete Unit
Performance at
Rating conditions
Running amp.
0.21
18
12.6
A
Power input
1,242
1,260
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
95 °F (35 °C) DB
34
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Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Fan Motor + Compressor
230V Single-phase 60Hz
8.15
Complete Unit
Performance at
Rating conditions
Running amp.
A
0.15
22
8.3
Power input
W
1,838
1,860
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
95 °F (35 °C) DB
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.16
22
8.94
9.1
A
1,838
1,860
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
95 °F (35 °C) DB
Indoor Unit
CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKUA
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Fan Motor + Compressor
230V Single-phase 60Hz
8.15
Complete Unit
Performance at
Rating conditions
Running amp.
0.15
22
8.3
A
Power input
1,838
1,860
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
95 °F (35 °C) DB
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.16
22
8.94
9.1
A
1,838
1,860
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
95 °F (35 °C) DB
35
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6-2. Electric Wiring Diagrams
Indoor Unit
CS-KS12NB41 & CZ-18BT1U
CS-KS18NB4UW & CZ-18BT1U
C O I L - 1
B L K
B L K
O R O M
B L K
B L K
B L K
B L K
S T W A I T C F H
O R G
B L U
B R N
W H T
B L K
W H T
B R N
B L U
O R G
B L K
W H T
B R N
B L U
O R G
B L K
T V L
B L U
P N K
Y E L
O R G
R E D
B R N
G R N
B L K
W H T
G R N / Y E L
Y E L / ( R E D )
Y E L / ( R E D )
B L U
Y E L
W H T
B L K
R E D
R E D
W H T
B L K
C O R E
F E R R I T E
36
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Outdoor Unit CU-KS12NK1A
8FA2-5251-12300-2
37
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Outdoor Unit CU-KS18NKU CU-KS18NKUA
REACTANCE
BLK
WHT
WHT
POWER RELAY
6
5
1 2
1 2
1
4
BLK
w
w
w
w
w
E
TERMINAL
PLATE
L1
L2
E2
E1
FERRITE CORE
w
w
w
U
V
25A
w
BLK
WHT
RED
ACIN1
1
2
w
w
ACIN2
SI-A
CONTROLLER
W
3
GND
4
5
6
BLK
1 2 3
1 2 3
COMP
1 2
A-TH
COIL/OUTDOOR
DCFM
MV0
1 2 3 4 5
1 2 3 4 5
1 2 3 4 1 2 3 4
1 2 3 4 5 6 7
WHT
1 2 1 2 3 4 1 2 3 4
N
L
POWER
SUPPLY
1 2
3 4 5 6 7
1 2 3 4 5 6 7
1 2 3 4 5
1 2 3 4 5
HIGH PRESSURE
SWITCH
BLK
BLK
MV0
S
R
T
1 1
2 2
FM
MAGNETIC COIL
CM
2P-CONNECTOR (BLK)
FAN MOTOR
COMPRESSOR
MOTOR
OVERLOAD RELAY
(OLR)
WHT
WHT
WHT
WHT
1
2
1
2
ELEC SYSTEM ASSY
*
2P-CONNECTOR (RED)
8FA2-5251-12000-2
38
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Ta b
7. MAINTENANCE
7-1. Address Setting of the Remote
Controller
The address can be set in order to prevent
interference between remote controllers when two
indoor units are installed near each other. The
address is normally set to "A." To set a different
address, it is necessary to change the address on the
second remote controller.
Fig. 1
NOTE
Once changed, you cannot restore the original
address setting of the air conditioner.
(1) Switch on the power source.
(2) Break the address-setting tab marked "A" on the
second remote controller to change the address
(Fig. 1). When the tab is removed, the address is
automatically set to B (Fig. 2).
ACL button
(3) Press and hold the remote controller HIGH
POWER button and 1 HR TIMER button. Then,
press and hold the ACL (reset) button with a
pointed object such as the tip of a pen. After 5
seconds, release ACL button first, then release
HIGH POWER and 1 HR. TIMER buttons, "oP-1"
(test run) appears, blinking in the remote
controller clock display area.
Fig. 2
(4) Each time the 1 HR TIMER button is pressed, the
display changes as shown below. Press this
button 2 times to change the display to "oP-7"
(address setting). (Fig. 3)
ON/OFF
operation
button
Test run mode
HIGH POWER
button
Self-diagnostic mode
Address setting mode
1HR.
TIMER
button
(5) "oP-7" has now been selected for address setting.
(6) Press the ON/OFF operation button on the remote
controller. (Fig. 3) Check that the "beep" signal
received sound is heard from the second indoor
unit (approximately 5 times). The sound you hear
is the signal that the remote controller address
has been changed.
(7) Finally press the remote controller ACL (reset)
button to cancel the blinking "oP-7" display. (Fig.
3)
ACL
(Reset)
button
Changing of the second remote controller address is
now completed.
Fig. 3
39
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7-2. Disconnecting and Connecting Positive Connector for Outdoor Unit
One of the two types of connectors illustrated at left is used. Their
basic structure is the same for each.
How to Disconnect
Hold the resin connector cover, and pull the connector off.
You cannot disconnect the connector by pulling the wire since
it is locked inside. Always hold the cover to disconnect. (See
illustration at left.) For the connector without the resin cover,
push the lock in the direction of "2" while pulling it off.
Pull the cover upward
How to Connect
In order to connect, hold the resin cover of the connector and
push it in. Confirm the click sound for the inside lock.
When the cover is pulled upward, the lock is
released with the sequence of 1 and 2.
40
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7-3. Disassembly Procedure
To avoid electrical shock hazard, be sure to disconnect power before
WARNING
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.
7-3-1. 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.
Latch
Hinge
Hook
Latch
Air intake grill
Hinge
Fig.1
Fig.2
Fig.3
7-3-2. 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)
CN04
Control PCboard
CN13
CN12
Screw
Control box cover
Fig.4
Fig.5
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7-3-3. 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 There is no strap on the indicator cover.
(5) Remove the bolt (4 locations) with a washer and remove the ceiling panel. (Fig. 9)
Screw
Clamp
Corner cover
Indicator
cover
Pull down
section 2.
Lead wire
Cover
Clamp
Center 1
Corner cover
Corner cover
Screw
Fig.6
Fig.7
Bolt
Strap
Remove the strap
from the hook.
Bolt
Fig.8
Fig.9
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7-3-4. 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
CN08
Fig.10
7-3-5. 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)
Terminal cover
Screw
Screw
Power box cover
Fig.11
Terminal
Ground cable
Power lines / Signal line
Fig.12
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(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
1
2
3
CN07
Fig.13
Screw
Screw
Screw
Screw
CN03
Fig.14
CN09
Screw
Screw
CN06
Fig.15
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For the removal of the following components, perform any work after removing the indoor
unit (main body) from the ceiling.
NOTE
Main body lower section
Float switch
Heat exchanger sensor
Turbo fan
Drain pump
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.
7-3-6. 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
Screw
Drain cap
Main body lower section
Main body lower section
Screw
Screw
Fig.16
Main body lower section
Main body
upper section
Screw
CN03
Fig.17
Fig.18
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7-3-7. Remove the heat exchanger sensor.
(1) Remove the heat exchanger sensor from the sensor holder. (Fig. 19)
Heat exchanger sensor
Holder
Fig.19
7-3-8. 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)
Screw
Drain pump
Float switch
Nut
Drain hose
Clamp
Fig.20
Fig.21
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7-3-9. 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
Screw
Nut
Nut
Fan motor
Fig.22
Fig.23
7-3-10. 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.
Heat exchanger
Screw
Screw
Main body
upper section
Screw
Fig.24
Fig.25
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8. FUNCTIONS
8-1. Operation Functions
Emergency operation
SENSOR DRY
Emergency operation is available when the remote
controller malfunctions, has been lost, or otherwise
cannot be used.
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.
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.
SENSOR DRY operation
DRY operation is as shown in the figure below.
Load
COOL zone
A zone
COOL
(GREEN)
STOP
(Lamp Off)
B zone
The set temperature is 4°F(2°C) below the detected room
temperature in the case of cooling operation.
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.
(15°C), or more than 5°F(3°C) below the set
When the monitoring range is entered, the compressor stops,
and the indoor fan operates with 1/f fluctuation.
NOTE
(CLxx models only)
The Sensor Dry operation during the Low Ambient Cooling
Mode (outside air temperature:59°F(15°C) or lower) is as
follows.
DRY A
and
DRY B
The compressor operates a cycle of 3 minutes ON and 6
minutes OFF repeatedly.
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.
48
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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.)
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.
HIGH POWER operation from remote controller
COOL and DRY modes
The unit operates at maximum output for 30 minutes,
regardless of the desired temperature.
The fan speed is 1 step above "High."
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.
Frequency
MAX
2°F(1°C)
Setting
Time
0
temperature
2°F(1°C)
30 min.
5 min.
Press the NIGHT
SETBACK button
30 min.
30 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.
Lamp colors
OPERATION lamp
DRY operation
COOL operation
FAN operation
Orange
Green
Green
OPERATION lamp
TIMER lamp
Green
Green
Green
HIGH POWER lamp
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.
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8-2. Protective Functions
Compressor discharge temperature control
Freeze prevention
This function controls the operation frequency to prevent the
compressor discharge temperature from rising more than a
specified temperature.
During COOL or DRY operation, freezing is detected and
operation is stopped when the temperature of the indoor heat
exchanger matches the conditions below.
1. Freeze-prevention operation is engaged when the
Compressor discharge temperature °F(°C)
temperature of the indoor heat exchanger is below 43°F(6°C).
2. Restart after freeze-prevention operation occurs when the
temperature of the indoor heat exchanger reaches 46°F(8°C)
or above.
Approx.
A
214
(101)
Approx.
B
201
C
(94)
46
(8)
a
b
c
d
A
B
43
(6)
a. Area: Automatic capacity control.
b. When the temperature rises above Point A, the operation
frequency is reduced at a specified rate.
c. Area: Further frequency increase is prohibited.
d. When the temperature falls below Point B, prevention of a rise
in frequency is released and the air conditioner operates as in
36
(2)
*
a
b
c
d
a. Area: Automatic capacity control
b. When the temperature drops below Point A, the operation
frequency is reduced by a certain proportion.
c. Area: Frequency increase is prohibited.
d. When the temperature reaches Point C or above, freezing
a
area.
* The compressor will stop if the temperature of the compressor
discharge exceeds 248°F(120°C) due to shortage of gas or
other reason.
prevention is ended and control is the same as in the
a
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.
CT (Peak current cut-off control)
This function prevents the circuit breaker or fuse from operating
to open the circuit. This function works when electrical current
has increased due to an increase in the cooling load,
or to a decrease in the power supply voltage. In these cases,
operation frequency is reduced or operation is interrupted auto-
matically to control the electrical current for operation.
(CLxx models only)
NOTE
The Freeze Prevention Control during the Low Ambient Cooling
Mode (outside air temperature:59°F(15°C) or lower) is as follows.
The compressor stops when the temperature of indoor heat
exchanger becomes less than 36°F(2°C).
The compressor restarts when the temperature of indoor heat
exchanger becomes 46°F(8°C) or higher.
When the cause of the increase in electrical current is rectified,
the system will resume operation in the original mode.
<CS-KS12NB41>
(A)
Cooling Dry
22.5
Peak current cut-off trips
Hz down
14.0
<CS-KS18NB4UW>
(A)
Cooling Dry
17.5
Peak current cut-off trips
Hz down
11.0
50
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9. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
9-1. Precautions before Performing Inspection or Repair
After checking the self-diagnostics monitor, turn the power OFF before starting inspection or repair.
High-capacity electrolytic capacitors are used inside the outdoor unit controller (inverter). They retain an electrical charge
(charging voltage DC 310V) even after the power is turned OFF, and some time is required for the charge to dissipate. Be
careful not to touch any electrified parts before the controller LED (red) turns OFF.
If the outdoor controller is normal, approximately 30 seconds will be required for the charge to dissipate. However, allow at
least 5 minutes for the charge to dissipate if there is thought to be any trouble with the outdoor controller.
9-2. Method of Self-Diagnostics
< Clock display >
Follow the procedure below to perform detailed trouble diagnostics.
Test run mode
Self-diagnostics mode
NOTE
1:If the operation lamp blinks every 0.5 seconds immediately when the
power is turned ON, there is an external ROM (OTP data) failure on the
indoor circuit board, or a ROM socket insertion problem, or the ROM
has not been installed.
2:The failure mode is stored in memory even when the power is not ON.
Follow the procedure below to perform diagnostics.
PROCEDURE
ON/OFF
operation
button
After turning on power to the air conditioner, use the remote controller and
follow the steps below to execute self-diagnostics.
Step 1: Press and hold the remote controller HIGH POWER button and 1
HR TIMER button. Then, press and hold the ACL (reset) button
with a pointed object such as the tip of a pen. After 5 seconds,
release ACL button first, then release HIGH POWER and 1 HR
TIMER buttons, "oP-1" (test run) appears, blinking in the remote
controller clock display area.
HIGH POWER
button
1HR.
TIMER
button
Step 2: Next, press the 1 HR TIMER button once to change the display
from "oP-1" to "oP-3" (self-diagnostics). (The display continues to
blink.)
Step 3: Finally press the ON/OFF button to engage self-diagnostics mode.
• The self-diagnostics function utilizes the 3 indicator lamps on the main
unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to
report the existence of sensor trouble or a protective operation. (The
lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.)
Self-diagnostics is completed when the buzzer sounds 3 short beeps.
• A maximum of 3 self-diagnostics reports are displayed, for 5 seconds
each, beginning with the most recent report. Following this display the
lamps turn OFF. In order to view the self-diagnostics results again,
press the ON/OFF button again.
ACL
(Reset)
button
• The 3 lamps remain OFF if no trouble has occurred.
<IMPORTANT> After self-diagnostics is completed, be sure to press the
ACL (reset) button to return to normal mode. The air
conditioner will not operate if this is not done.
51
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(1) Self-diagnostics Lamps
INDOOR UNIT
OPERATION button
OPERATION lamp
TIMER lamp
HIGH POWER lamp
REMOTE CONTROL receiver
Since the indications cover various units, the corresponding parts listed below may not be present in some models.
.... .... ....
INDICATION ON INDOOR UNIT
OFF
BLINKING
ON
HIGH
OPERATION
TIMER
POWER
CODE
S01
DIAGNOSIS CONTENTS
POSSIBLE MALFUNCTION
(1) OPEN OR SHORT CIRCUIT IN SENSOR
(2) POOR CONTACT AT CONNECTOR OR OPEN
CIRCUIT AT TERMINAL PRESS-FIT LOCATION.
(3) I/D PCB FAILURE (I/D = INDOOR)
ROOM TEMP. SENSOR TROUBLE
I/D HEAT EXCHANGER TEMP.
SENSOR TROUBLE
S02
(1) OPEN OR SHORT CIRCUIT IN SENSOR
(2) POOR CONTACT AT CONNECTOR OR OPEN
CIRCUIT AT TERMINAL PRESS-FIT LOCATION
(3) O/D PCB FAILURE (O/D = OUTDOOR)
COMPRESSOR TEMP. SENSOR
TROUBLE
S04
S05
O/D HEAT EXCHANGER TEMP.
SENSOR TROUBLE
O/D AIR TEMP. SENSOR TROUBLE
O/D CURRENT SENSOR ERROR
S06
S07
O/D PCB FAILURE
(1) MIS-WIRING (2) AC POWER FAILURE (3) BLOWN FUSE
(4) POWER RELAY FAILURE (5) I/D OR O/D PCB FAILURE
(6) O/D FAN MOTOR FAILURE (7) REACTOR FAILURE
I/D-O/D COMMUNICATION
TROUBLE
E01
E02
(SERIAL COMMUNICATION
TROUBLE)
(8) HIGH-PRESSURE SW FAILURE (9) OLR FAILURE (10) MAGNETIC COIL FAILURE
(1) HIC OR POWER TR FAILURE (2) O/D FAN NOT OPERATING
(3) INSTANTANEOUS POWER STOPPAGE (4) SERVICE VALVE NOT OPENED
(5) O/D FAN BLOCKED (6) CONTINUOUS OVERLOAD OPERATION
(7) COMPRESSOR FAILURE (8) O/D PCB FAILURE
HIC CIRCUIT TROUBLE
POWER TR CIRCUIT TROUBLE
O/D UNIT EXTERNAL ROM
TROUBLE
(1) EXTERNAL ROM DATA FAILURE (2) O/D PCB FAILURE
E03
E04
(1) INSTANTANEOUS POWER STOPPAGE (2) HIC OR POWER TR FAILURE
(3) O/D PCB FAILURE
CURRENT PEAK CUT
PAM CIRCUIT TROUBLE
(1) O/D PCB FAILURE
(2) O/D POWER VOLTAGE TROUBLE
E05
E06
E07
E08
ACTIVE CIRCUIT TROUBLE
(1) ELECTRIC EXPANSION VALVE FAILURE (2) CHOKED CAPILLARY TUBE
(3) INSUFFICIENT GAS (4) CONTINUOUS OVERLOAD OPERATION
(5) O/D FAN NOT OPERATING (6) O/D PCB FAILURE
COMPRESSOR
DISCHARGE TEMP.
OVERHEATING PREVENTION
(1) FAN MOTOR FAILURE (2) CONNECTOR CONTACT FAILURE
(3) I/D PCB FAILURE
I/D FAN OPERATION TROUBLE
4-WAY VALVE SWITCHING
TROUBLE
ZERO-CROSS TROUBLE
(1) 4-WAY VALVE FAILURE (HEAT PUMP MODEL ONLY)
(2) O/D PCB FAILURE
(1) SERVICE VALVE NOT OPENED (2) INSUFFICIENT GAS
(1) OPEN PHASE (2) O/D PCB FAILURE
GAS-LOSS PREVENTION
E09
E10
DC COMPRESSOR DRIVE
CIRCUIT TROUBLE
(1) FAN MOTOR FAILURE (2) CONNECTOR CONTACT FAILURE
(3) O/D PCB FAILURE
E11
E12
O/D DC FAN OPERATION TROUBLE
(1) MIS-WIRING (2) BLOWN FUSE
(3) POWER RELAY FAILURE (4) O/D PCB FAILURE
(5) COMPRESSOR FAILURE
O/D SYSTEM COMM FAILURE,
OLR OPERATION, O/D POWER
OPEN PHASE, O/D FREEZING
(1) I/D FAN SYSTEM TROUBLE (2) INSUFFICIENT GAS
(3) OPERATION AT LOW TEMPERATURE
FREEZING-PREVENTION OPERATION
FLOAT SWICTH (FS) IS ACTIVED.
E13
TIMER
LAMP
BLINKING (3 SEC. INTERVAL)
(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE
8512-5261-99100-1
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(2) If the self-diagnostics function fails to operate
Check the indoor unit.
• No indicators illuminate and the
indoor fan does not rotate.
• Check the power voltage.
Blown
Is the fuse blown?
Normal
Replace the circuit
board or the fuse.
Replace the controller.
9-3. Checking the Indoor and Outdoor Units
(1) Checking the indoor unit
No.
Control
Check items (unit operation)
• The rated voltage must be present between inter-unit wirings 1 and 2.
1
Use the remote controller to operate the
unit in "TEST run" mode. To determine
whether the mode is currently in
"TEST run" mode, check the 3 indicator
lamps on the unit. If all 3 are blinking,
the current mode is "TEST run."
•
Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the
voltage at both ends is measured, approximately 12 to 15V DC must
be output and the multimeter pointer must bounce once every 8
seconds.
Or instead of measuring the voltage, you can insert an LED jig and
check that the LED flickers once every 8 seconds.
If there are no problems with the above, then check the outdoor unit.
For the "Test run" procedure, refer to the Appendix B "Installation Instructions".
(2) Checking the outdoor unit
No.
Control
Check items (unit operation)
1
Apply the rated voltage between outdoor
unit terminals L and N.
• The control panel LED (red) must illuminate.
2
Short-circuit the outdoor unit COM terminal
to the T-RUN terminal.
• The compressor, fan motor and 4-way valve must all turn on.
If there are no problems with the above, then check the indoor unit.
TEST/T-RUN terminals
Using the TEST/T-RUN terminals
T-RUN
: Test run (compressor and fan motor turn ON).
TEST/MV : Compresses time to 1/60th (accelerates
operation by 60 times faster than normal).
(TEST)/MV T-RUN COM
53
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(3) Serial Communication Error Identification Procedure
If the lamps on the main body show the following conditions after the completion of self-diagnostics,
a communication error between the indoor unit and outdoor unit might be considered.
In such a case, identify the breakdown section by using the following procedure.
NOTE
Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure.
Lamp Operation
Timer
High Power
: Off
: Blinking
: Illuminated
Condition
E01
E12
< Before the Operation >
For terminal strip short circuit work or inter-unit wiring removal, turn off the power to
avoid an electric shock.
WARNING
Release the terminal strip short circuit after the completion of self-diagnostics.
Do not perform the short-circuit work between any other terminals except for
specified ones on the specified terminal strip. If such work is performed between
the incorrect terminals, the unit might be broken.
CAUTION
< Convenient Tool for Short-Circuit Work ( for example ) >
Cable
Alligator Clip
Alligator Clip
< Check Items before Troubleshooting Serial Communication Start >
After confirming that the following errors do not exist, start the "Troubleshooting Serial Communication"
in "Condition: E01 and E12".
1. Mis -wiring (inter-unit cable, etc.)
2. AC power failure
6. Reactor failure (defective insulation, etc.)
7. High-Pressure Switch failure
3. Blown fuse
8. Overload Relay failure
4. Power Relay failure
5. Outdoor Fan Motor failure (defective insulation, etc.)
9. Magnetic Coil failure (defective insulation, short-circuit, etc.)
10. Compressor failure (defective insulation, etc.)
(3-1) Condition: E01
-
+
Outdoor Unit
V
1
2
3
3
4
5
6
Outdoor Unit
Troubleshooting Serial Communication
1
1
2
3
4
5
6
Power
1
2
Power
Indoor Unit
2
3
V
Indoor Unit
+
-
Fig. 2
Fig. 1
1. Turn OFF the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Disconnect the cable from the terminal 3 on the indoor unit
Is the voltage of about DC12V
or more given between the terminals
2 and 3 on the outdoor unit terminal strip
(Serial Communication Line) ?
(Fig. 1)
No
terminal strip.
(Fig. 2)
3. Turn ON the power.
Yes
A
B
( Continued to the next page B. )
( Continued to the next page A. )
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( Continued from the previous page A. )
A
( Continued from the previous page B. )
B
Is the voltage of about DC22V to
24V given between the terminals
2 and 3 on the indoor unit terminal strip
(Serial Communication Line) ?
(Fig. 2)
Yes
No
Defect in the indoor unit
P.C. board
Defect or connection error
in the inter-unit cable
Outdoor Unit
1. Turn OFF the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Short-circuit between the terminals 2 and 3 on the outdoor
1
1
2
2
3
3
4
5
6
Power
unit terminal strip.
(Fig. 3)
Indoor Unit
Fig. 3
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
Condition: E12
Defect in the outdoor unit
P.C. board.
What is the latest self-diagnosis result ?
Condition: E01
Outdoor Unit
Outdoor Unit
1. Turn off the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Remove the short-circuit between the terminals 2 and 3 on
the outdoor unit terminal strip.
1
1
2
3
3
4
5
6
1
2
2
3
4
5
6
Power
Power
3. Disconnect the cable from the terminal 3 on the indoor unit
2
terminal strip.
(Fig. 4)
1
3
Indoor Unit
Fig. 4
Indoor Unit
Fig. 5
Short-circuit between the terminals 2 and 3 on the indoor unit
terminal board. (Fig. 5)
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
Condition: E12
Defect or connection error
in the inter-unit cable
What is the latest self-diagnosis result ?
Condition: E01
Defect in the indoor unit
P.C. board
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(3-2) Condition: E12
Troubleshooting Serial Communication
Outdoor Unit
1
1
2
2
3
3
4
5
6
Power
1. Turn off the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Disconnect the cable from the terminal 3 on the Outdoor
Indoor Unit
unit terminal strip.
(Fig. 6)
Fig. 6
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
Condition: E01
Defect in the outdoor unit
P.C. board
What is the latest self-diagnosis result ?
Condition: E12
Outdoor Unit
1
1
2
3
3
4
5
6
1. Turn off the power and wait until the power lamp (LED)
of the outdoor unit controller is turned OFF.
2. Disconnect the cable from the terminal 3 on the indoor
Power
2
unit terminal strip.
(Fig. 7)
Indoor Unit
Fig. 7
1. Turn ON the power and operate the system using the
remote controller or the operation button on the indoor unit.
2. Perform the self-diagnosis five seconds after the operation
start.
Condition: E01
Defect in the inter-unit
cable
What is the latest self-diagnosis result ?
Condition: E12
Defect in the indoor unit
P.C. board
56
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9-4. Trouble Diagnosis of Fan Motor
9-4-1. Indoor Fan Motor
This indoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil
resistance, and the following procedure should be used to check the motor.
To perform diagnosis, operate the unit in cooling mode with indoor fan speed "High". Next, make sure that the
indoor unit receive the signals from the remote controller when the ON/OFF operation button is pressed.
(A) Turn OFF the power before connecting or disconnecting the motor connectors.
(B) When performing voltage measurement at the indoor controller connector for (3) in the table
below, the DC motor will trip and voltage output will stop approximately 1 minute after operation
is started. For this reason, to measure the voltage again, turn OFF the unit once using the
remote controller, and then start the air conditioner again.
Important:
[Trouble symptom 1] The fan does not stop when the unit stops. Indoor unit controller trouble.
[Trouble symptom 2] The fan motor does not rotate when the unit is operating.
(Diagnostic procedure)
* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the indoor
unit controller (3 locations).
Measurement location
Normal value
CS-KS12NB41
DC 130V to 195V
CS-KS18NB4UW
DC 280V to 340V
(1) Vm-Gnd: Between pin 1 and pin 3
(2) Vcc-Gnd: Between pin 4 and pin 3
(3) Vs-Gnd: Between pin 5 and pin 3
DC 15V +/- 10%
Fluctuation between DC 1.8V to 5.7V
(Diagnostic results)
All of the above measured values are normal. Fan motor trouble (Replace the motor.)
Any one of the above measured values is not normal. Indoor unit controller trouble (Replace the controller .)
(Reference)
DC motor connector pin arrangement
Pin 1: Vm (red)
Pin 2: Not used
Pin 3: Gnd (black)
Pin 4: Vcc (white)
Pin 5: Vs (yellow)
Pin 6: PG (blue)
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the indoor unit
operates.
(There is trouble in the system that provides feedback of motor rotation speed from the
motor to the indoor unit controller.)
[Trouble symptom 4] Fan motor rotation speed does not change during indoor unit operation.
[Trouble symptom 5] Fan motor rotation speed varies excessively during indoor unit operation.
(Remedy for symptom 3 to 5)
It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble.
Therefore, first replace the indoor unit controller, then (if necessary) replace the DC motor.
57
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9-4-2. Outdoor Fan Motor
This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil
resistance, and the following procedure should be used to check the motor.
Perform the trouble diagnosis by Test Run mode described on Installation Instructions.
(A) Turn OFF the power before connecting or disconnecting the motor connectors.
(B) When performing voltage measurement at the outdoor controller connector for (3) in the table
below, the DC motor will trip and voltage output will stop approximately 10 seconds after
operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor
unit power, then, measure the voltage in Test Run mode.
Important:
[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble
[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.
(Diagnostic procedure)
* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor
unit controller (3 locations).
Measurement location
Normal value
(1) Vs-Gnd: Between pin 1 and pin 4
(2) Vcc-Gnd: Between pin 5 and pin 4
(3) Vsp-Gnd: Between pin 7 and pin 4
DC 110V or more
DC 14V or more
After fluctuating 4 times between DC 1.0 to 4.3V
(1 sec. ON) and DC 0 V (1 sec. OFF), the DC
motor trips.
(Diagnostic results)
All of the above measured values are normal. Fan motor trouble (Replace the motor.)
Any one of the above measured values is not normal. Outdoor unit controller trouble
(Replace the controller .)
(Reference)
DC motor connector pin arrangement
Pin 1: Vs (white)
Pin 2: Not used
Pin 3: Not used
Pin 4: Gnd (black)
Pin 5: Vcc (red)
Pin 6: FG (blue)
Pin 7: Vsp (yellow)
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor
unit operates.
(There is trouble in the system that provides feedback of motor rotation speed from the
motor to the outdoor unit controller.)
[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.
[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.
(Remedy for symptom 3 to 5)
It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble.
Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.
58
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9-5. Noise Malfunction and Electromagnetic Interference
An inverter A/C operates using pulse signal control and high frequencies. Therefore, it is susceptible to the effects of external
noise, and is likely to cause electromagnetic interference with nearby wireless devices.
A noise filter is installed for ordinary use, preventing these problems. However, depending on the installation conditions, these
effects may still occur. Please pay attention to the points listed below.
(1) Noise malfunction
This refers to the application of high-frequency noise to the signal wires, resulting in abnormal signal pulses and malfunction.
Locations most susceptible to noise
Trouble
Correction
1. Locations near broadcast stations where
there are strong electromagnetic waves
Either of the following trouble may occur.
(The fundamental concept is to make the
system less susceptible to noise.)
1. The unit may stop suddenly during
operation.
2. Locations near amateur radio (short wave)
stations
- Insulate for noise or
distance from the noise source. -
2. Indicator lamps may flicker.
3. Locations near electronic sewing machines
and arc-welding machines
1. Use shielded wires.
2. Move unit away from the noise source.
(2) Electromagnetic interference
This refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through
space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby.
Locations most susceptible to noise
Trouble
Correction
1. A television or radio is located near the
A/C and A/C wiring.
1. Noise appears in the television picture, 1. Select a separate power source.
or the picture is distorted.
2. Keep the A/C and A/C wiring at least 1 meter
2. The antenna cable for a television or
radio is located close to the A/C and A/C
wiring.
2. Static occurs in the radio sound.
away from wireless devices and antenna cables.
3. Change the wireless device’s antenna to a
high-sensitivity antenna.
3. Locations where television and radio
signals are weak.
4. Change the antenna cable to a BS coaxial cable.
5. Use a noise filter (for the wireless device).
6. Use a signal booster.
59
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10. CHECKING ELECTRICAL COMPONENTS
Ground wire
10-1. Measurement of Insulation
Resistance
Clip
The insulation is in good condition if the resistance
exceeds 1M ohm.
Probe
10-1-1. Power Supply Cord
Insulation
tester
Clamp the grounding wire of power cord with the lead
Fig. 1
clip of the insulation resistance tester and measure the
resistance by placing a probe on either of the two
power wires. (Fig. 1)
Terminal plate
Then also measure the resistance between the
grounding and other power terminals. (Fig. 1)
Probe
10-1-2. Indoor Unit
Clamp an aluminum plate fin or copper tube with the
lead clip of the insulation resistance tester and
measure the resistance by placing a probe on each
terminal screw on the terminal plate. (Fig. 2)
Note that the ground line terminal should be skipped
for the check.
Clip
Copper
tube or
Insulation
tester
metallic part
10-1-3. Outdoor Unit
Fig. 2
Clamp a metallic part of the unit with the lead clip of
the insulation resistance tester and measure the
resistance by placing a probe on each terminal screw
where power supply lines are connected on the
terminal plate. (Fig. 2)
Probe
10-1-4. Measurement of Insulation
Resistance for Electrical Parts
Clip
Copper
tube or
Disconnect the lead wires of the desired electric part
from terminal plate, capacitor, etc. Similarly disconnect
the connector. Then measure the insulation resistance.
(Figs. 3 and 4)
metallic part
Insulation
tester
Fig. 3
NOTE
From fan motor,
compressor and
other parts
Refer to Electric Wiring Diagram.
If the probe cannot enter the poles because the hole is
too narrow then use a probe with a thinner pin.
Probe
Metallic
part
Clip
Insulation
tester
Fig. 4
60
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10-2. Checking Continuity of Fuse
on PCB Ass'y
Fuse
Remove the PCB Ass'y from the electrical
component box. Then pull out the fuse from the PCB
Ass'y. (Fig. 5)
Check for continuity using a multimeter as shown in
Fig. 6.
PCB Ass'y
Fig. 5
Fuse
Fig. 6
61
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11. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
11-1. Characteristics of New Refrigerant R410A
11-1-1. What is New Refrigerant R410A?
R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its
refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.
11-1-2. Components (mixing proportions)
HFC32 (50%) / HFC125 (50%)
11-1-3. Characteristics
Less toxic, more chemically stable refrigerant
The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when
there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in
composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the
remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified
amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).
When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid
phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in
gaseous state. Thus, always charge the refrigerant while it is in liquid phase.
Ether-type oil is used for compressor oil for R410A-type units, which is different
CAUTION
from the mineral oil used for R22. Thus more attention to moisture prevention and
faster replacement work compared with conventional models are required.
62
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11-2. Checklist before Servicing
Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ
between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of
extrusion) by using the flare spacer.
Specification A
Diameter of tube D
Flare tool for R410A
Conventional flare tool (for R22)
Dia.1/4" (6.35 mm)
Dia.3/8" (9.52 mm)
Dia.1/2" (12.7 mm)
Dia.5/8" (15.88 mm)
0 to 0.0196"
0.0472"
(0 to 0.5 mm)
(1.2 mm)
Size of flare
Spacer
D
D
A
A
Flare tool for R410A
Conventional flare tool (R22)
Tubing precautions
Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily
cover the ends of the tubing with caps or tape prior to installation.
Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickness, since
air conditioners with R410A are subject to higher pressure than those using R22 and R407C.
No addition of compressor oil for R410A
No additional charge of compressor oil is permitted.
No use of refrigerant other than R410A
Never use a refrigerant other than R410A.
If refrigerant R410A is exposed to fire
Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure
to provide ample ventilation during installation work.
Caution in case of R410A leak
Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room,
immediately provide thorough ventilation.
63
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11-3. Tools Specifically for R410A
For servicing, use the following tools for R410A
Tool Distinction
Gauge manifold
Tool Name
Charging hose
Gas leak detector
Refrigerant cylinder
Charging cylinder
Refrigerant recovery unit
Vacuum pump with anti-reverse flow (*1)
(Solenoid valve-installed type, which prevents oil from flowing back into the
unit when the power is off, is recommended.)
Vacuum pump (*2)...can be used if the following adapter is attached.
Vacuum pump adapter (reverse-flow prevention adapter) (*3).
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)
Electronic scale for charging refrigerant
Flare tool
Tools specifically for R410A
Bender
Tools which can be com-
monly used for R22,
R407C, and R410A
Torque wrench
Cutter, reamer
Welding tool, nitrogen gas cylinder
The above tools specifically for R410A must not be used for R22 and R407C.
Doing so will cause malfunction of the unit.
CAUTION
For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for
R22-type units can be used for R410A-type. However, they must be used
exclusively for R410A and never alternately with R22 and R407C.
To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external
diameter of the service port screw has been altered.
<External diameter of service port> R410A : 5/16"
R22, R407C : 1/4"
11-4. Tubing Installation Procedures
When the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing.
The following is the HAB oil generally used:
Esso: ZERICE S32
NOTE
For details on tubing installation procedures, refer to the installation manuals attached to the indoor
unit and outdoor unit.
64
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11-5. In Case of Compressor Malfunction
Should the compressor malfunction, be sure to make the switch to a replacement
compressor as quickly as possible.
CAUTION
Use only the tools indicated exclusively for R410A. See "11-3. Tools
Specifically for R410A."
11-5-1. Procedure for Replacing Compressor
(1) Recovering refrigerant
Any remaining refrigerant inside the unit should not be
released to the atmosphere, but recovered using the
refrigerant recovery unit for R410A.
(1) Recover refrigerant
OK
Do not reuse the recovered refrigerant, since it will contain
impurities.
(2) Replacing Compressor
(2) Replace compressor
OK
Soon after removing seals of both discharge and suction
tubes of the new compressor, replace it quickly.
(3) Checking for sealing
Use nitrogen gas for the pressurized gas, and never use a
refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(3) Check for sealing
OK
(4) Evacuation
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
(4) Evacuation
OK
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
When using a vacuum pump with exhaust air volume more
than 0.883 cu.ft./min. and ultimate vacuum pressure rate
of 50 micron Hg.
(5) Recharge
Standard time for evacuation
Length of tubing
Less than 33 ft. (10 m)
More than 33 ft. (10 m)
Evacuation time
More than 10 minutes
More than 15 minutes
65
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(5) Recharging
Be sure to charge the specified amount of
Configuration and characteristics of cylinders
Valve
refrigerant in liquid state using the service port
of the wide tube service valve. The proper
amount is listed on the unit's nameplate.
When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.
Liquid
Never charge a large amount
CAUTION
of liquid refrigerant at once to
the unit. This may cause
damage to the compressor.
Single valve
Charge liquid refrigerant with
cylinder in up-side-down position.
When charging with a refrigerant cylinder, use an
electronic scale for charging refrigerant. In this
case, if the volume of refrigerant in the cylinder
becomes less than 20% of the fully-charged
amount, the composition of the refrigerant starts
to change. Thus, do not use the refrigerant if
the amount in the charging cylinder is less
than 20%.
Fig. 1
Valve
Also, charge the minimum necessary amount to
the charging cylinder before using it to charge
the air conditioning unit.
Example:
Liquid
In case of charging refrigerant to a unit requiring
1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10
Kg) cylinder, the minimum necessary amount for
the cylinder is:
Single valve (with siphon tube)
Charge with cylinder in normal position.
1.68 + 22 0.20 = 6.08 lb.
(0.76 + 10 0.20 = 2.76 Kg)
Fig. 2
For the remaining refrigerant, refer to the
instructions of the refrigerant manufacturer.
If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.
NO!
Charging
cylinder
Prepare an evacuated charging cylinder
beforehand.
To prevent the composition
CAUTION
of R410A from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the
refrigerant. (Fig. 3)
Liquid
Open
Refrigerant
cylinder
Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.
Fig. 3
66
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11-6. In Case Refrigerant is Leaking
Never attempt to charge additional refrigerant when refrigerant has been leaking
CAUTION
from the unit. Follow the procedure described below to locate points of leaks and
carry out repairs, then recharge the refrigerant.
(1) Detecting Leaks
Use the detector for R410A to locate refrigerant leak
points.
(1) Detect leaks
(2) Recovering refrigerant
Never release the gas to the atmosphere; recover
OK
residual refrigerant using the refrigerant recovery unit for
R410A, instead.
Do not reuse the recovered refrigerant because its
composition will have been altered.
(2) Recover refrigerant
OK
(3) Welding leaking points
Confirm again that no residual refrigerant exists in the unit
before starting welding.
(3) Weld leaking points
OK
Weld securely using flux and wax for R410A.
Prevent oxide film from forming inside the tubes utilizing
substitution with nitrogen (N2) in the refrigerant circuit of
the unit. Leave ends of tubes open during welding.
(4) Checking for sealing
(4) Check for sealing
OK
Use nitrogen gas for the pressurized gas, and never use
a refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(5) Evacuation
(5) Evacuation
OK
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
(6) Recharge
When using a vacuum pump with exhaust air volume
more than 0.883 cu.ft./min. and ultimate vacuum pressure
rate of 50 micron Hg.
Standard time for evacuation
Length of tubing
Less than 33 ft. (10 m)
More than 33 ft. (10 m)
Evacuation time
More than 10 minutes
More than 15 minutes
(6) Recharging
Recharge unit in the same manner explained on the
previous page "(5) Recharging."
67
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11-7. Charging Additional Refrigerant
11-7-1. When Tubes are Extended
Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came
with the indoor unit. Charge additional refrigerant in liquid state only.
Never charge additional refrigerant if refrigerant is leaking from the unit. Follow
CAUTION
instructions given in "11-6. In Case Refrigerant is Leaking" and completely carry
out repairs. Only then should you recharge the refrigerant.
11-8. Retro-Fitting Existing Systems
11-8-1. Use of Existing Units
Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to
operate improperly and may result in a hazardous condition.
11-8-2. Use of Existing Tubing
If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing. Instead,
completely new tubing must be used.
68
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APPENDIX A Operating Instructions
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
(852-6-4181-211-00-1)
A-1
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Operating Instructions
Split System Air Conditioner
Model No.
Indoor Units
Outdoor Units
(For Single use)
CS-KS12NB41
CS-KS18NB4UW
CU-KS12NK1A
CU-KS18NKU
CU-KS18NKUA
(For Multiple use)
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
Ceiling Panel
CZ-18BT1U
This air conditioner uses the refrigerant R410A.
“Multiple use” is applied for the model
CS-KS18NB4UW only.
• “Single use” means that only one indoor unit is
connected with one outdoor unit in a one-unit-to-one-
unit configuration.
• “Multiple use” (i.e. Flexi-Multi system) means that two
or more indoor units are connected with one outdoor
unit in a multiple-unit-to-one-unit configuration.
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181211001
CV6233187622
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FEATURES
This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below;
refer to these descriptions when using the air conditioner.
• Microprocessor Controlled Operation
• Automatic and 3-step Fan Speed
The interior compartment of the remote controller contains
several features to facilitate automatic operation, easy
logically displayed for easy use.
Auto/High/Medium/Low
• Air Sweep Control
This function moves a flap up and down in the air outlet,
directing air in a sweeping motion around the room and
providing comfort in every corner.
• Simple One-touch Remote Controller
The remote controller has several features to facilitate
automatic operation.
• Auto. Flap Control
This automatically sets the flap to the optimum position
• 24-Hour ON or OFF Timer
This timer can be set to automatically turn the unit on or off
during cooling and drying operation.
at any time within a 24 hour period.
• Automatic Restart Function for Power Failure
Even when power failure occurs, preset programmed
operation can be reactivated once power resumes.
• 1-Hour OFF Timer
This timer can be set to automatically turn off the unit at
any time after one hour.
• High Power Operation
The unit operates at maximum output for 30 minutes,
regardless of the desired temperature.
The fan speed is 1 step above “High”.
• Night Setback
This function saves energy by controlling operation to
provide a quieter operating sound than normal.
CONTENTS
Page
FEATURES.................................................................................2
PRODUCT INFORMATION........................................................2
SAFETY PRECAUTIONS...........................................................2
INSTALLATION LOCATION........................................................3
ELECTRICAL REQUIREMENTS ...............................................3
SAFETY INSTRUCTIONS..........................................................3
NAMES OF PARTS ....................................................................4
USING THE REMOTE CONTROLLER ......................................8
OPERATION WITH THE REMOTE CONTROLLER...................9
1. Operation ....................................................................9
2. Adjusting the Fan Speed.............................................9
3. Fan Only......................................................................9
4. Night Setback Mode..................................................10
5. HIGH POWER Mode.................................................10
Page
SPECIAL REMARKS ...............................................................10
SETTING THE TIMER .............................................................10
USING THE 1-HOUR OFF TIMER ..........................................12
TIPS FOR ENERGY SAVING..................................................12
ADJUSTING THE AIRFLOW DIRECTION ..............................12
OPERATION WITHOUT THE REMOTE CONTROLLER.........13
CARE AND CLEANING ...........................................................13
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) .15
OPERATING RANGE...............................................................15
WIRED REMOTE CONTROLLER ...........................................15
SPECIFICATIONS....................................................................16
PRODUCT INFORMATION
SAFETY PRECAUTIONS
If you have problems or questions concerning your Air
Conditioner, you will need the following information. Model
and serial numbers are on the nameplate on the bottom of
the cabinet.
The following symbols used in this manual, alert you
to potentially dangerous conditions to users, service
personnel or the appliance:
This symbol refers to a hazard or unsafe
practice which can result in severe
personal injury or death.
Model No. __________________________________
Serial No. ___________________________________
Date of purchase _____________________________
Dealer’s address _____________________________
Phone number _______________________________
This symbol refers to a hazard or unsafe
practice which can result in personal
CAUTION
injury or product or property damage.
2
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INSTALLATION LOCATION
• To prevent possible hazards from insulation failure,
the unit must be grounded.
• We recommend that this air conditioner be installed
properly by qualified installation technicians in
accordance with the Installation Instructions
provided with the unit.
• Before installation, check that the voltage of the electric
supply in your home or office is the same as the voltage
shown on the nameplate.
• Do not clean inside the indoor and outdoor units by users.
Engage authorized dealer or specialist for cleaning.
• In case of malfunction of this appliance, do not repair by
yourself. Contact to the sales dealer or service dealer for a
repair.
• Refrigerant gas leakage may cause fire.
• For safety, be sure to turn the air conditioner off and
also to disconnect the power before cleaning.
• Pull off the power plug from a receptacle, or switch off the
breaker, or switch off the power disconnecting mean to
isolate the air conditioner from the main power supply in
case of emergency.
• Do not install this air conditioner
where there are fumes or flammable
gases, or in an extremely humid space
such as a greenhouse.
• Do not install the air conditioner where
excessively high heat-generating
objects are placed.
CAUTION
Avoid:
• Do not turn the air conditioner on and off from the power
mains switch. Use the ON/OFF operation button.
• Do not stick anything into the air outlet of the outdoor unit.
This is dangerous because the fan is rotating at high
speed.
• Do not touch the air inlet or the sharp aluminum fins
of the outdoor unit. You may get injured.
• Keep the fire alarm and the air outlet at least 1.5m away from
the unit.
To protect the air conditioner from heavy corrosion, avoid installing
the outdoor unit where salty sea water can splash directly onto it or
in sulphurous air near a spa.
ELECTRICAL REQUIREMENTS
1. All wiring must conform to the local electrical codes.
Consult your dealer or a qualified electrician for details.
2. Each unit must be properly grounded with a ground (or
earth) wire or through the supply wiring.
• Do not let children play with the air conditioner.
• Do not cool or heat the room too much if babies or invalids
are present.
3. Wiring must be done by a qualified electrician.
• Do not sit or step on the unit. You may fall down
accidentally.
• Do not stick any object into the FAN CASE.
You may be injured and the unit may be damaged.
NOTE
Pull off the power plug from a receptacle, or switch off the breaker, or
switch off the power disconnecting mean to isolate the air conditioner
from the main power supply when not in use for a long time.
SAFETY INSTRUCTIONS
NOTICE
• Read this Instruction Manual carefully before using
this air conditioner. If you still have any difficulties
or problems, consult your dealer for help.
• This air conditioner is designed to give you
comfortable room conditions. Use this only for its
intended purpose as described in this Instruction
Manual.
• This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
• This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules.
These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Confirm to authorized dealer or specialist on usage of
specified refrigerant type.
Using of refrigerant other than the specified type may cause
product damage, burst and injury etc.
• Never touch the unit with wet hands.
• Never use or store gasoline or other flammable vapor or
liquid near the air conditioner — it is very dangerous.
• Do not use this appliance in a potentially explosive
atmosphere.
• This air conditioner has no ventilator for intaking fresh air
from outdoors. You must open doors or windows frequently
when you use gas or oil heating appliances in the same
room, which consume a lot of oxygen from the air.
Otherwise there is a risk of suffocation in an extreme case.
• Do not swallow the battery.
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
• After removing the battery from remote controller, keep it
away from the reach of children. The battery can cause
death by suffocation if swallowed.
• When inserting the battery, make sure the polarities
(+ and -) are correct.
• FCC Caution: To assure continued compliance, follow the
attached installation instructions. Any changes or modifications
not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
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NAMES OF PARTS
UNIT DISPLAY AND OPERATION
BUTTON
INDOOR UNIT
INDOOR UNIT
Air Intakes
OPERATION button
OPERATION lamp
Air Outlet!
TIMER lamp
(4 locations)
HIGH POWER lamp
REMOTE CONTROL receiver
Remote Controller
IMPORTANT
Refrigerant Tubes
OUTDOOR UNIT
Avoid using radio equipment such as mobile phone near (within
4 ft. (1.2 m)) the remote control receiver. Some radio equipment
may cause malfunction of the unit.
Drain Hose
If the trouble happens, disconnect power and restart the air
conditioner after a few minutes.
REMOTE
CONTROL
receiver
This section picks up infrared signals from the
remote controller (transmitter).
OPERATION
button
When the remote controller cannot be used,
pressing this button enables cooling operation.
Air Outlet
Each time this button is pressed, the operation
mode changes cyclically.
NOTE
Stop
Cooling operation
This illustration is based on the external view of a standard model.
Consequently, the shape may differ from that of the air conditioner
which you have selected.
OPERATION
lamp
This lamp lights when the system is in the
continuous DRY (orange), COOL (green) and
FAN (green) mode.
This air conditioner consists of an indoor unit and an outdoor unit.
You can control the air conditioner with the remote controller.
TIMER lamp
This lamp lights when the system is being
controlled by the timer.
Air from the room is drawn into this section and
passes through air filters which remove dust.
Air Intake
HIGH POWER
lamp
This lamp lights during operation in the HIGH
POWER mode.
Conditioned air is blown out of the air
conditioner through the air outlet.
Air Outlet
The remote controller controls power ON/OFF,
operation mode selection, temperature, fan
speed, timer setting, and air sweeping.
Remote
Controller
NOTE
The unit’s display lamps are dimmed during operation in the NIGHT
SETBACK mode.
The indoor and outdoor units are connected by
copper tubes through which refrigerant gas
flows.
Refrigerant
Tubes
Moisture in the room condenses and drains off
through this hose.
Drain Hose
The outdoor unit contains the compressor, fan
motor, heat exchanger coil, and other electrical
components.
Outdoor
(Condensing)
Unit
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REMOTE CONTROLLER (DISPLAY)
Displayed when transmitting data
Displayed when indoor unit sensor is
in use
Displayed when setting temperature
Displayed when temperature is shown
Displayed when setting timer
Displayed when the time
display is set to 12-hour
time.
Symbols
(4) Timer
24-hour clock with ON/OFF
(1) Operation mode
MILD DRY ..............................
COOL.....................................
FAN ........................................
program Timer .......................
ON Timer. ..............................
OFF Timer. ............................
1-hour OFF Timer..................
(2) Fan speed
Automatic operation ...............
(5) NIGHT SETBACK..................
HIGH .....................................
MEDIUM.................................
LOW.......................................
(6) Confirmation
of transmission.......................
(7) Auto. flap indication................
Flap angle indication..............
Sweep indication....................
(8) High power operation.............
(3) Temperature setting
60 – 86 °F
When set to 80 °F
temperature indication............
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REMOTE CONTROLLER
Transmitter
When you press the buttons on the remote controller, the
mark
appears in the display to transmit the setting changes to the receiver
in the air conditioner.
Display
Information on the operating conditions is displayed while the remote
controller is switched on. If the unit is turned off, FLAP setting and
FAN SPEED setting are not displayed.
HIGH POWER button
: If this button is pressed during DRY, COOL or FAN operation, the unit
operates at maximum output for 30 minutes, regardless of the
desired temperature.
The fan speed is 1step above ‘‘HIGH’’.
FAN SPEED selector button
: The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed
FLAP button
Press this button either to select the setting of the airflow direction to the auto.
flap in each mode or one of the six possible positions manually or to select the
sweep function which moves the flap up and down automatically.
: Auto flap setting: If selected in a cooling or dry operation, the flap is set
at position (7) in the following chart.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.
NOTE
When you press the FLAP button, the air flow direction will be changed one by
one as follows.
SWEEP
ON TIME/OFF TIME setting buttons
Advance button
Return button
No display: The timer does not operate.
: The air conditioner starts at the set time.
: The air conditioner stops at the set time.
: The air conditioner stops and starts, or starts and
stops, at the set times every day. For details, see
“SETTING THE TIMER”.
CANCEL button
SENSOR button
When you press this button (use a small-tipped object such as a ballpoint
pen), the
mark will appear at the display. And the room temperature is
detected by the sensor which is built into the indoor unit and the air
conditioner is controlled accordingly.
NOTE
If the remote controller is located near a heat source, such as a space
heater or in direct sunlight, press the SENSOR button to switch to the
sensor on the indoor unit.
ADDRESS switch
• The address switch changes to prevent mixing of signals from remote controller’s when
two air conditioners are installed next to each other. Normally, the address switch is set
to A. For more information, please contact the dealer where you made the purchase.
• Normally, the tabs on the remote controller should not be bent.
Temperature display selector button
This switches the temperature display
between °C and °F.
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Sensor
A temperature sensor inside the remote controller senses the room
temperature.
ON/OFF operation button
This button is for turning the air conditioner on and off.
1 HR. TIMER button (1-HOUR OFF TIMER)
: When you press this button, regardless of whether the unit is operating
or stopping, the unit operates for one hour and then shuts down.
Temperature setting buttons (TEMP.)
Press the
button to increase the set temperature.
Press the
button to reduce the set temperature.
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.
buttons is pressed.
MODE selector button
Use this button to select DRY, COOL or FAN mode.
(DRY)
(COOL)
(FAN)
: The air conditioner reduces the humidity in the room.
: The air conditioner makes the room cooler.
: The air conditioner works only as a circulation fan.
NIGHT SETBACK button
For details, see “4. Night Setback Mode”. When you press this button in the
DRY or COOL mode, the
mark appears in the display, and the remote
controller will automatically adjust the set temperature to save energy.
CLOCK button
Time display selector button
This switches the time display between 24-hour time and 12-hour time.
ACL button (ALL CLEAR)
Puts the remote controller into pre-operation status. Always press this button
after replacing the batteries.
(Cover closed)
NOTE
• The illustration above pictures the remote controller after the cover has been opened.
• The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the
remote controller stops for more than 15 minutes due to the loss of the remote controller or other trouble, the air conditioner will
switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the
temperature around the remote controller may differ from the temperature detected at the air conditioner’s position.
• The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.
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USING THE REMOTE CONTROLLER
HOW TO INSTALL BATTERIES
HOW TO USE THE REMOTE CONTROLLER
When using the remote controller, always point the unit’s transmitter
head directly at the air conditioner’s receiver.
Air Conditioner
(Indoor unit)
Receiver
(Transmitter
head)
Remote Controller
REMOTE CONTROLLER INSTALLATION
POSITION
ACL button
The remote controller may be operated either from a non-fixed
position or from a wall-mounted position. To ensure that the air
conditioner operates correctly, do not install the remote controller in
the following places:
1. Slide the cover in the direction indicated by the arrow and remove
it.
2. Install two AAA alkaline batteries. Make sure the batteries point in
the direction marked in the battery compartment.
3. Use a thin object such as the tip of a pen to press the ACL button.
• In direct sunlight
• Behind a curtain or other places where it is covered
• More than 26 ft.(8 m) away from the air conditioner
• In the path of the air conditioner’s airstream
• Where it may become extremely hot or cold
• Where it may be subject to electrical or magnetic noise
• Where there is an obstacle between the remote controller and air
conditioner (since a check signal is sent from the remote controller
every 5 minutes)
• The batteries last about six months,
depending on how much you use the
CAUTION
remote controller. Replace the
batteries when the remote controller’s
display fails to light, or when the
remote controller cannot be used to
change the air conditioner’s settings.
• Use two fresh leak-proof type-AAA
alkaline batteries.
• In replacing batteries, follow the
instructions as mentioned in the
subsection “HOW TO INSTALL
BATTERIES”.
• If you do not use the remote controller
more than 1 month, take out the
batteries.
• Dispose of the used batteries at the
designated location in compliance
with the applicable local ordinances.
MOUNTING THE REMOTE CONTROLLER
Before mounting the remote controller, press the ON/OFF operation
button at the mounting location to make sure that the air conditioner
operates from that location. The indoor unit should make a beeping
sound to indicate that it has received the signal.
Rear Side
Remote Control Holder
Information for Users on Collection and Disposal
of Old Equipment and used Batteries
Press
Set in
Hole
[Information on Disposal in other Countries
outside the European Union]
place
These symbols are only valid in the European Union.
If you wish to discard these items, please contact
your local authorities or dealer and ask for the correct
method of disposal.
• To prevent loss of the remote
controller, you can connect the
remote controller to the holder by
passing a string through the remote
controller and attachment hole.
Mounting Screws
5/32 x 5/8"
(4 x 16 mm)
(included)
Note for the battery symbol (bottom two symbol
examples):
To take out the remote controller, pull it forward.
This symbol might be used in combination with a
chemical symbol. In this case it complies with the
requirement set by the Directive for the chemical
involved.
WHEN HOLDING THE REMOTE CONTROLLER
• When using the remote controller and during air conditioner
operation, the transmitter on the remote controller should be
pointed towards the receiver on the indoor unit.
Pb
• Make sure that there are no objects between the remote controller
and receiver which could block the signal.
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OPERATION WITH THE REMOTE CONTROLLER
1. Operation
2. Adjusting the Fan Speed
A. Automatic fan speed
Simply set the FAN SPEED selector button to the
position.
This automatically sets the best fan speed for the room
temperature.
B. Manual fan speed
If you want to adjust fan speed manually during operation,
just set the FAN SPEED selector button as desired. [
, or
,
]
STEP 2
STEP 3
3. Fan Only
STEP 2
STEP 1
STEP 4
STEP 5
STEP 1
Check that the circuit breaker on the power panel is
turned on.
NOTE
STEP 3
Press the setting buttons as described below and
change the settings as desired.
If you want to circulate air without any temperature
control, follow these steps:
STEP 1
Press the MODE selector button
and select the desired mode.
For dehumidifying operation
For cooling operation
o
o
o
STEP 1
Press the MODE selector button to switch to
the fan mode
.
For fan only operation
STEP 2
STEP 3
Press the ON/OFF operation button.
STEP 2
STEP 3
To start the air conditioner, press the ON/
OFF operation button.
Press the FAN SPEED selector button to
select the fan speed of your choice (
or ).
Press the TEMP. setting buttons to change
the temperature setting to the desired
temperature.
,
Adjustable temperature range:
30 °C max.
16 °C min.
or
86 °F max.
60 °F min.
STEP 4
STEP 5
Set the FAN SPEED selector button to the
setting you want.
Press the FLAP button and set the airflow
direction as desired.
(Refer to “ADJUSTING THE AIRFLOW
DIRECTION” on page 12.)
To stop the air conditioner, press the ON/OFF
operation button again.
• Choose the best position in the room for the remote
controller, which also acts as the sensor for room
comfort and transmits the operating instructions.
Once you’ve found this best position, always keep the
remote controller there.
NOTE
• This appliance has a built-in 5-minute time delay
circuit to ensure reliable operation. When the
operation button is pressed, the compressor will start
running within three minutes. In the event of power
failure, the unit will stop.
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HIGH POWER mode can be used to increase the output of the
indoor unit for all operation modes.
4. Night Setback Mode
Press the HIGH POWER button while unit is operating.
The
mark appears in the display.
To cancel, press HIGH POWER button again.
• When the HIGH POWER button is pressed, the unit operates at
maximum output for 30 minutes, regardless of the desired
temperature. The fan speed is 1 step above “High”.
NOTE
Depending on the operating conditions, the fan speed may be
increased by a small amount only.
SPECIAL REMARKS
‘‘DRY’’ ( ) Operation
How it works?
• Once the room temperature reaches the level that was set, the
unit’s operation frequency is changed automatically.
• During DRY operation, the fan speed automatically runs at lower
speed for providing a comfortable breeze.
• ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F
or less.
Night Setback Mode is used for saving energy.
Press the NIGHT SETBACK button while unit is operating.
The
mark appears in the display.
To release the night setback function, press the NIGHT SETBACK
button again.
Cooling ( ) operation
• Sometimes the indoor unit may not get to the set fan speed such as
LOW under cool operation at very low outdoor temperatures due to
the indoor unit being protected from ice or frost when combined with
the outdoor unit for Low Ambient Cooling models.
In Cooling and DRY Mode: ( and
)
When the night setback mode is selected, the air conditioner
automatically raises the temperature setting 2 °F when 30 minutes
have passed after the selection was made, and then another 2 °F
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.
Power failure during operation
• In the event of power failure, the unit will stop. When the power is
resumed, the unit will restart automatically in approximately
5 minutes by the remote controller.
Clicking Sound
2 °F
Clicking sound is heard from the air conditioner
Setting
temperature
• In cooling operation, any plastic parts may shrink due to a sudden
temperature change. In this event, a clicking sound may occur. This
is normal, and the sound will soon disappear.
2 °F
30 min.
30 min.
Press the NIGHT
SETBACK button
Time
Remote Controller
• The remote controller sends the setting condition to the air
conditioner regularly at five minute intervals.
5. HIGH POWER Mode
SETTING THE TIMER
NOTE
In the descriptions below, the following settings are used for the
temperature and time indicator selector button on the bottom front
section of the remote controller.
• Temperature: °F
• Time: AM, PM
10
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1. How to set the present time
(Example) To set to 10:30 pm.
Operation
Indication
The timer indication is
displayed, and the present ON
time is shown.
1. Press the ON TIME setting
button once.
2. Press the Advance, Return
The timer
) button until AM 7:10 blinks.
indication
(
,
is displayed.
The time can be set in 10-minute
increments. Holding down the
button advances the time rapidly
in 10-minute increments.
Operation
Indication
3. Wait a few seconds, and then The timer
indication
stops blinking and the present
time is displayed.
1. Press the CLOCK button
once if the time indicator is
not flashing.
The time indication alone
flashes.
the setting is complete.
2. Press the Advance, Return
The time can be set in 1-minute
) button until PM 10:30 increments. Holding down the
4. How to set daily ON/OFF repeat timer
(Example) To start operation at 7:10 am. and stop the air conditioner
at 11:00 am.
(
,
is displayed.
button advances the time rapidly
in 10-minute increments.
3. Press the CLOCK button
This completes the setting of the
current time.
again.
2. How to set the OFF time
(Example) To stop the air conditioner at 11:00 am.
10:30 pm.
Present time
7:10 am.
ON
11:00am.
OFF
Operation
Indication
1. Set the timer ON/OFF times The present time 10:30 pm. and
Operation
Indication
indication is
displayed, and the present OFF
time is shown.
as shown in 2-1, 2, 3 and 3-1,
2, 3.
are displayed.
1. Press the OFF TIME setting The timer
button once.
NOTE
• The ON/OFF combination timer uses the current time as the
reference, and it is activated starting from whichever set time
comes first.
• With the ON/OFF combination timer, the settings are repeated
every day.
• You can check the timer ON/OFF times after you have set them by
pressing the ON TIME and OFF TIME setting buttons.
2. Press the Advance, Return
The timer
) button until AM 11:00 blinks.
indication
(
,
is displayed.
The time can be set in 10-minute
increments. Holding down the
button advances the time rapidly
in 10-minute increments.
3. Wait a few seconds, and then The timer
indication
the setting is complete.
stops blinking and the present
time is displayed.
To cancel a timer program
• Press the CANCEL button.
• When either an ON or OFF timer is to be canceled, press the
button corresponding to the timer whose program is to be
canceled, and then press the CANCEL button.
3. How to set the ON time
(Example) To start operation at 7:10 am.
NOTE
• The airflow direction, fan speed and temperature setting can be
changed after a timer program has been set even when the unit is
stopped. Even when operation is stopped during an ON timer
program, the unit will start operating when the set time is reached
provided that the program is not canceled.
• When the ON timer and OFF timer are set to the same time, the
timer operates as if it is turned off.
11
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USING THE 1-HOUR OFF
TIMER
ADJUSTING THE AIRFLOW
DIRECTION
The vertical airflow can be adjusted by moving the flap with the
remote controller. Do not move the flap with your hands. Confirm that
the remote controller has been turned on. Use the FLAP button to
set either the sweep function or one of the six airflow direction
settings.
1. 1-Hour OFF Timer
A. Sweep function
The flap starts moving
up and down to deliver
air over the sweep
range.
This function causes the unit to operate for one hour and then
stop, regardless of whether the unit is on or off when this
button is pressed.
The
indicator in the display indicates that this function is
operating.
Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1
HR. TIMER button.
B. Setting the airflow manually
SWEEP
Referring to the above
illustration, use the
FLAP button to set the
airflow direction within
the range used during
the cooling or
COOL
DRY
FAN
appears in the display.
Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the
unit to stop operating, and then press the ON/OFF operation button
again.
dehumidifying operation.
The 1-Hour Timer function is now cancelled and the unit operates
normally.
C. Auto flap function
The flap is set to
the
recommended
position.
NOTE
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER
button is pressed once to cancel the function and then again, the
unit continues to operate for one hour from that point in time and
then stops.
NOTE
• It is not possible to use the OFF Timer and 1-Hour OFF Timer
together. Whichever function is set last takes precedence. If the 1
HR. TIMER button is pressed while the TIMER OFF function
operates, the OFF Timer is cancelled and the unit will stop
operating one hour later.
The flap automatically closes when the unit is off.
CAUTION
• Use the FLAP button on the remote controller to adjust the
position of the flap. If you move the flap by hand, the flap
position according to the remote controller and the actual
flap position may no longer match. If this should happen,
shut off the unit, wait for the flap to close, and then turn on
the unit again; the flap position will now be normal again.
• Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip
down.
2. Operation together with the daily ON/OFF
repeat timer
The 1-Hour OFF Timer setting is given priority over the DAILY ON/
OFF REPEAT setting.
TIPS FOR ENERGY SAVING
Avoid
• Do not block neither the air intake nor the air outlet. It may
cause less performance, and may leads to malfunctions.
• Do not let direct sunlight into the room. Use sunshades, blinds or
curtains. If the walls and ceiling of the room are warmed by the
sun, it will take longer to cool the room.
Do
• Always try to keep the air filter clean. (Refer to “CARE AND
CLEANING”.) A clogged filter will impair the performance of the
unit.
• To prevent conditioned air from escaping, keep windows, doors and
any other openings closed.
12
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OPERATION WITHOUT THE
REMOTE CONTROLLER
CARE AND CLEANING
• Cleaning and maintenance operations
must be carried out by specially
trained personnel.
INDOOR UNIT
While working in high places, slipping
or falling may result in serious injury.
• For safety, be sure to turn the air
conditioner off and also to disconnect
the power before cleaning.
• Do not pour water on the indoor unit to
clean it. This will damage the internal
components and cause an electric
shock hazard.
OPERATION button
OPERATION lamp
Ceiling panel (Indoor Unit)
Clean the ceiling panel of the indoor unit with a vacuum cleaner
brush, or wipe it with a clean, soft cloth.
If you have lost the remote controller or it has trouble, follow the
steps below.
If it is stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning it, be careful not to force the flaps out of
place.
When the air conditioner is not running
Each time the OPERATION button is pressed, the operation mode
changes cyclically.
• Never use solvents, or harsh chemicals
CAUTION
when cleaning the indoor unit. Do not
wipe the plastic casing using very hot
water.
Stop
Cooling operation
• Some metal edges and the fins are
sharp and may cause injury if handled
improperly; be especially careful when
you clean these parts.
NOTE
• The internal coil and other components
of the outdoor unit must be cleaned
every year. Consult your dealer or
service center.
The temperature is set to the room temperature minus 4°F during
the cooling operation, and the fan speed and flap are set to Auto.
Cleaning the flaps
• The air outlet flap can be removed and washed with water.
• Be sure to always stop operation before removing the flap.
• After washing with water, allow it to dry, and then remount it.
CAUTION
• Do not move the flap with your hands.
• When using a footstool or the like, be careful not to let it tip
over.
Cleaning the main unit and Remote Controller
• Wipe clean using a soft, dry cloth.
• To remove stubborn dirt, moisten a cloth in warm water no hotter
than 104 °F, wring thoroughly, and then wipe.
13
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Air filter
How to remove the air intake grille
The air filter collects dust and other particles from the air and should
be cleaned once every 6 months.
If the filter gets blocked, the efficiency of the air conditioner drops
greatly.
1. Open the air intake grille.
2. Detach the safety cord from the frame (remember to attach it
again after cleaning or maintenance).
3. Hold on the air intake grille and pull it towards you to detach the
two air intake grille hinges.
NOTE
4. Clean the grille gently using a soft sponge, or the like. Then dry it
The frequency with which the filter should be cleaned depends on
the environment in which the unit is used.
with care.
Neutral detergent may be used to remove stubborn dirt. Then
rinse thoroughly with water and dry it.
How to remove the filter
1. Slide the two latches of the air intake grille with your thumbs in the
Air intake grille hinge
direction of the arrow to open the grille.
Air intake
grille
Ceiling
panel
Latch
2. Open the air intake grille downward.
Air intake grille hinge
Safety cord
• When cleaning the air filter, never
remove the safety cord. If it is
CAUTION
necessary to remove it for servicing
and maintenance inside, be sure to
reinstall the safety cord securely (hook
on the grille side) after the work.
• When the air intake grille has been
opened, rotating parts (such as the
fan), electrically charged areas, etc. will
be exposed in the unit’s opening. Bear
in mind the dangers that these parts
and areas pose, and proceed with the
work carefully.
Air intake grille
3. Press the tabs on both sides of the air filter (indicated with
marks on the grill) to release the filter, and then, lift and pull the
filter up and out using the tabs to remove it.
• Periodically check the outdoor unit to
see if the air outlet or air intake is
clogged with dirt or soot.
Care: After a prolonged idle period
Check the indoor and outdoor unit air intakes and outlets for
blockage; if there is a blockage, remove it.
Care: Before a prolonged idle period
• Operate the fan for half a day to dry out the inside.
• Disconnect the power supply and also turn off the circuit breaker.
• Clean the air filter and replace it in its original position.
• Outdoor unit internal components must be checked and cleaned
periodically.
Safety cord
Air filter
Contact your local dealer for this service.
4. Use a vacuum cleaner to remove light dust. If there is sticky dust
on the filter, wash the filter in lukewarm, soapy water, rinse it in
clean water, and dry it.
5. Insert the filter correctly again inside the grille, close the grille
letting the latches slide towards the outside and fix again the
latch.
14
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TROUBLESHOOTING
(BEFORE CALLING FOR SERVICE)
If your air conditioner does not work properly, first check the following
points before requesting service. If it still does not work properly,
contact your dealer or service center.
OPERATING RANGE
The air conditioner is operable within the temperature ranges as
listed below:
For Cooling Only Models : CU-KS18NKU
Temperature
Max.
Indoor air
temperature
Outdoor air
temperature
Trouble
Possible Cause
Remedy
COOLING
95 °F DB /
71 °F WB
115 °F DB
Air conditioner does
not run at all.
1. Power failure.
1. Restore power.
2. Leakage circuit
breaker tripped.
2. Contact service
center.
Min.
67 °F DB /
57 °F WB
67 °F DB
For Low Ambient Cooling Models : CU-KS12NK1A, CU-KS18NKUA
3. Line voltage is too
low.
3. Consult your
electrician or
dealer.
Temperature
Indoor air
temperature
Outdoor air
temperature
4. Batteries in remote 4. Replace batteries.
controller have run
down.
COOLING
Max.
95 °F DB /
71 °F WB
115 °F DB
Min.
67 °F DB /
57 °F WB
0 °F DB
OPERATION lamp
blinks and air
Trouble in system.
Contact service
center.
conditioner does not
operate.
For Cooling Only Models : CU-3KS19NBU, CU-4KS24NBU,
CU-4KS31NBU
Compressor runs but Obstruction in front of Remove obstruction.
soon stops.
condenser coil.
(Outdoor Unit)
Temperature
Indoor air
temperature
Outdoor air
temperature
Poor cooling
performance.
1. Dirty or clogged air 1. Clean air filter to
COOLING
Max.
95 °F DB /
71 °F WB
115 °F DB
filter.
improve airflow.
2. Heat source or
many people in
room.
2. Eliminate heat
source if possible.
Min.
67 °F DB /
57 °F WB
14 °F DB
3. Doors and/or
windows are open.
3. Shut them to keep
the heat out.
WIRED REMOTE CONTROLLER
4. Obstacle near air
intake or air
discharge port.
4. Remove it to ensure
good airflow.
A separately sold wired remote controller (CZ-RD515U)
used with this air conditioner is also available. If you wish
to use the wired remote control function, you will need to
purchase the optional wired remote controller.
5. Thermostat is set
too high for cooling.
5. Set the temperature
lower.
Clicking sound is
heard from the air
conditioner.
In cooling operation,
any plastic parts may the sound will soon
shrink due to a
sudden temperature
change. In this event,
a clicking sound may
occur.
This is normal, and
disappear.
OPERATION lamp
lights but outdoor unit phones near the air
will not run.
The use of cellular
1. Turn off the power
then restart the air
conditioner after a
while.
conditioner may cause
disturbance to its
normal operation.
2. Consult your dealer.
TIMER lamp blinks
(3 sec. interval) and
air conditioner does
not operate.
FLOAT SWITCH is
actived.
Contact service
center.
15
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SPECIFICATIONS
• For Single use
Model No.
Outdoor Unit
CU-KS12NK1A
Indoor Unit
CS-KS12NB41
Power Source
Cooling Capacity
Single-phase, 115 V, 60 Hz
3.50 [ 0.90 ~ 3.50 ]
11,900 [ 3,000 ~ 11,900 ]
kW
BTU/h
kW
-
-
Heating Capacity
BTU/h
Cooling
Operation
Outdoor (Hi)
Indoor(H/M/L)
Outdoor (Hi)
Indoor(H/M/L)
47
-
-
-
34/32/31
-
dB(A)
Operation
Sound
Heating
Operation
dB(A)
-
-
21-9/16×28-11/32×10-7/16
(548×720×265)
11-5/32×22-5/8×22-5/8
(283×575×575)
Unit Dimensions (H×W×D)
inch(mm)
lbs.(kg)
Net Weight
75.0(34.0)
35.3(16.0)
• For Single use
Outdoor Unit
CU-KS18NKU , CU-KS18NKUA
Indoor Unit
CS-KS18NB4UW
Model No.
Power Source
Single-phase, 208-230 V, 60 Hz
5.15 [ 1.20 ~ 5.15 ]
17,500 [ 4,000 ~ 17,500 ]
kW
BTU/h
kW
Cooling Capacity
-
-
Heating Capacity
BTU/h
Cooling
Operation
Outdoor (Hi)
Indoor(H/M/L)
Outdoor (Hi)
Indoor(H/M/L)
51
-
-
-
dB(A)
Operation
Sound
44/40/36
-
-
Heating
Operation
dB(A)
-
26-3/8×34-21/32×11-7/32
(670×880×285)
11-5/32×22-5/8×22-5/8
(283×575×575)
Unit Dimensions (H×W×D)
inch(mm)
lbs.(kg)
Net Weight
90.4(41.0)
35.3(16.0)
Ceiling Panel
CZ-18BT1U
Model No.
1-9/16×24-19/32×24-19/32
(40×625×625)
Unit Dimensions (H×W×D)
inch(mm)
Net Weight
lbs. (kg)
6.0(2.7)
16
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• For Multiple use
Model No.
Indoor Unit
CS-KS18NB4UW
Power Source
Cooling Capacity
Single-phase, 208-230 V, 60 Hz
5.15
17,500
-
kW
BTU/h
kW
Heating Capacity
-
BTU/h
Cooling Operation
dB(A)
dB(A)
44/40/36
Operation
Sound
(H/M/L)
Heating Operation
(H/M/L)
-
11-5/32×22-5/8×22-5/8
(283×575×575)
Unit Dimensions (H×W×D)
inch(mm)
lbs.(kg)
Net Weight
35.3(16.0)
• For Multiple use
Outdoor Unit
CU-4KS24NBU
Model No.
CU-3KS19NBU
CU-4KS31NBU
Single-phase, 208-230 V, 60 Hz
Power Source
5.50 [ 2.90 ~ 5.50 ]
18,800 [ 9,800 ~ 18,800 ]
7.50 [ 2.90 ~ 7.50 ]
25,400 [ 9,800 ~ 25,400 ]
9.00 [ 2.90 ~ 9.00 ]
30,600 [ 9,800～30,600 ]
kW
BTU/h
kW
BTU/h
dB(A)
dB(A)
Cooling Capacity
-
-
50
-
-
-
50
-
-
-
53
-
Heating Capacity
Cooling Operation (Hi)
Operation
Sound
Heating Operation (Hi)
29-1/8×35-7/16×12-19/32 29-1/8×35-7/16×12-19/32 35-1/32×35-7/16×12-19/32
Unit Dimensions (H×W×D)
inch(mm)
(740×900×320)
(740×900×320)
(890×900×320)
lbs.(kg)
Net Weight
138.9(63.0)
138.9(63.0)
174.2(79.0)
17
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APPENDIX B INSTALLATION INSTRUCTIONS
CS-KS12NB41 & CZ-18BT1U + CU-KS12NK1A
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKU
CS-KS18NB4UW & CZ-18BT1U + CU-KS18NKUA
(852-6-4190-574-00-1)
A-2
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INSTALLATION INSTRUCTIONS
Split System Air Conditioner
This air conditioner uses the refrigerant R410A.
Contents
Page
NOTE
External diameter of service port R410A: 5/16"
IMPORTANT!
Please Read Before Starting .................................. 2
Model Combinations
1. GENERAL .......................................................... 4
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Unit
Combine indoor and outdoor units only as listed
below.
1-3. Optional Copper Tubing Kit
1-4. Type of Copper Tube and Insulation Material
1-5. Additional Materials Required for Installation
Model No.
Indoor Unit
Outdoor Unit
2. INSTALLATION SITE SELECTION ................... 5
2-1. Indoor Unit
CS-KS12NB41
CU-KS12NK1A
Power Source:
60 Hz, single-phase, 115 V
2-2. Outdoor Unit
2-3. Baffle Plate for the Outdoor Unit
CS-KS18NB4UW
CU-KS18NKU
3. HOW TO INSTALL THE INDOOR UNIT........... 12
3-1. Preparation for Suspending
CU-KS18NKUA
Power Source:
3-2. Suspending the Indoor Unit
3-3. Placing the Unit Inside the Ceiling
3-4. Installing the Drain Piping
60 Hz, single-phase, 230/208 V
3-5. Checking the Drainage
Ceiling Panel
CZ-18BT1U
3-6. How to Install the Ceiling Panel
3-7. Wiring Instructions
3-8. Recommended Wire Length and Diameter
3-9. Wiring Instructions for Inter-unit Connections
4. HOW TO INSTALL THE OUTDOOR UNIT....... 20
4-1. Wiring Instructions for the Outdoor Unit
5. REFRIGERANT TUBING.................................. 21
5-1. Use of the Flaring Method
5-2. Flaring Procedure with a Flare Tool
5-3. Caution before Connecting Tubes Tightly
5-4. Connecting Tubing between Indoor and
Outdoor Units
5-5. Insulation of Refrigerant Tubing
5-6. Taping the Tubes
5-7. Finishing the Installation
6. AIR PURGING................................................... 23
ꢀ Air Purging with a Vacuum Pump (for Test Run)
ꢀ Basic Functions of the Service Valves
ꢀ Pump Down
ꢀ Service Valve Connections
7. REMOTE CONTROLLER INSTALLATION
POSITION ......................................................... 27
7-1. Mounting on a Wall
8. ADDRESS SWITCH.......................................... 28
8-1. Address Setting of the Remote Controller
CV6233187785
85264190574001 2011
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When Transporting
IMPORTANT!
Please Read Before Starting
Be careful when picking up and moving the indoor and out-
door units. Get a partner to help, and bend your knees when
lifting to reduce strain on your back. Sharp edges or thin alu-
minum fins on the air conditioner can cut your fingers.
This air conditioning system meets strict safety and operating
standards. As the installer or service person, it is an important
part of your job to install or service the system so it operates
safely and efficiently.
When Installing…
Select an installation location which is rigid and strong
enough to support or hold the unit, and select a location for
easy maintenance.
For safe installation and trouble-free operation, you
must:
ꢁ
Carefully read this instruction booklet before beginning.
…In a Ceiling or Wall
ꢁ
Follow each installation or repair step exactly as shown.
Make sure the ceiling/wall is strong enough to hold the
unit’s weight. It may be necessary to construct a strong
wood or metal frame to provide added support.
ꢁ
Observe all local, state, and national electrical codes.
ꢁ
Pay close attention to all warning and caution notices
given in this manual.
This symbol refers to a hazard
or unsafe practice which can
result in severe personal injury
or death.
…In a Room
Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.
WARNING
This symbol refers to a hazard
or unsafe practice which can
result in personal injury or prod-
uct or property damage.
Keep the fire alarm and the air
outlet at least 1.5 m away from
the unit.
CAUTION
CAUTION
If Necessary, Get Help
…In Moist or Uneven Locations
These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.
Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents
water damage and abnormal vibration.
…In an Area with High Winds
In Case of Improper Installation
Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.
The manufacturer shall in no way be responsible for improp-
er installation or maintenance service, including failure to
follow the instructions in this document.
…In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.
SPECIAL PRECAUTIONS
WARNING
When Connecting Refrigerant Tubing
When Wiring
‡ :KHQꢀSHUIRUPLQJꢀpiping work
do not mix air except for speci-
fied refrigerant (R410A) in
refrigeration cycle. It causes
capacity down, and risk of
explosion and injury due to
high tension inside the refrige-
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM.
‡ 'RꢀQRWꢀVXSSO\ꢀSRZHUꢀWRꢀWKHꢀXQLWꢀXQWLOꢀDOOꢀZLULQJꢀDQGꢀWXELQJ
are completed or reconnected and checked.
‡ +LJKO\ꢀGDQJHURXVꢀHOHFWULFDOꢀYROWDJHVꢀDUHꢀXVHGꢀLQꢀWKLV
system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and
inadequate grounding can cause accidental injury or
death.
rant cycle.
WARNING
‡ 5HIULJHUDQWꢀJDVꢀOHDNDJHꢀPD\
cause fire.
‡ *URXQGꢀWKHꢀXQLW following local electrical codes.
‡ 'RꢀQRWꢀDGGꢀRUꢀUHSODFHꢀUHIULJHUDQW
other than specified type.
It may cause product damage,
burst and injury etc.
‡ &RQQHFWꢀDOOꢀZLULQJꢀWLJKWO\ꢁꢀ/RRVHꢀZLULQJꢀPD\ꢀFDXVHꢀRYHUꢂ
heating at connection points and a possible fire hazard.
‡ 7RꢀSUHYHQWꢀSRVVLEOHꢀKD]DUGVꢀIURPꢀLQVXODWLRQꢀIDLOXUHꢃ
the unit must be grounded.
‡ 9HQWLODWHꢀWKHꢀURRPꢀZHOOꢃꢀLQꢀWKHꢀHYHQWꢀWKDWꢀUHIULJHUDQWꢀ
gas leaks during the installation. Be careful not to allow
contact of the refrigerant gas with a flame as this will
cause the generation of poisonous gas.
2
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‡ 8VHꢀWKHꢀIODUHꢀPHWKRGꢀIRUꢀFRQQHFWLQJꢀWXELQJꢁ
Others
‡ $SSO\ꢀUHIULJHUDQWꢀOXEULFDQWꢀWRꢀWKHꢀPDWFKLQJꢀVXUIDFHVꢀRI
the flare and union tubes before connecting them,
then tighten the nut with a torque wrench for a leak-
free connection.
CAUTION
‡ &KHFNꢀFDUHIXOO\ꢀIRUꢀOHDNVꢀEHIRUHꢀVWDUWLQJꢀWKHꢀWHVWꢀUXQꢁ
‡ 9HQWLODWHꢀDQ\ꢀHQFORVHGꢀDUHDVꢀZKHQꢀLQVWDOOLQJꢀRUꢀWHVWLQJ
the refrigeration system. Escaped refrigerant gas, on
contact with fire or heat, can produce dangerously
toxic gas.
‡ 'RꢀQRWꢀOHDNꢀUHIULJHUDQWꢀZKLOHꢀSLSLQJꢀZRUNꢀIRUꢀDQꢀLQVWDOODWLRQ
or re-installation, and while repairing refrigeration parts.
Handle liquid refrigerant carefully as it may cause frost-
bite.
‡ &RQILUPꢀXSRQꢀFRPSOHWLQJꢀLQVWDOODWLRQꢀWKDWꢀQRꢀUHIULJHUDQW
gas is leaking. If escaped gas comes in contact with a
stove, gas water heater, electric room heater or other heat
source, it can produce dangerously toxic gas.
When Servicing
‡ 7XUQꢀWKHꢀSRZHUꢀ2)) DWꢀWKHꢀPDLQꢀSRZHUꢀER[ꢀꢄPDLQVꢅ
before opening the unit to check or repair electrical
parts and wiring.
‡ 'RꢀQRWꢀWRXFKꢀWKHꢀDLUꢀLQOHWꢀRUꢀWKHꢀVKDUSꢀDOXPLQXPꢀ
fins of the outdoor unit. You may get injured.
‡ 'RꢀQRWꢀVLWꢀRUꢀVWHSꢀRQꢀWKHꢀXQLWꢃꢀ\RXꢀPD\ꢀIDOOꢀGRZQ
‡ .HHSꢀ\RXUꢀILQJHUVꢀDQGꢀFORWKLQJꢀDZD\ꢀIURPꢀDQ\ꢀPRYLQJ
accidentally.
parts.
‡ 'RꢀQRWꢀVWLFNꢀDQ\ꢀREMHFWꢀLQWRꢀWKHꢀ)$1ꢀ&$6(ꢁ
‡ &OHDQꢀXSꢀWKHꢀVLWHꢀDIWHUꢀ\RXꢀILQLVKꢃꢀUHPHPEHULQJꢀWRꢀFKHFN
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
You may be injured and the unit may be damaged.
NOTE
The illustrations are based on the typical appearance of
a standard model. Consequently, the shape may differ
from that of the air conditioner that you are installing.
3
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1. General
This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instruc-
tions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.
1-1. Tools Required for Installation (not supplied)
1. Standard screwdriver
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
6. Sabre saw or key hole saw
7. Hacksaw
8. Core bits
9. Hammer
10. Drill
11. Tube cutter
12. Tube flaring tool
13. Torque wrench
14. Adjustable wrench
15. Reamer (for deburring)
5. Carpenter’s level
1-2. Accessories Supplied with Unit
Table 1
Parts
Figure
Q’ty
Remarks
Parts
Figure
Q’ty
Remarks
For temporarily
suspending indoor
unit from ceiling
For full-scale
installation
diagram
3/16 13/32"
(5 10mm)
Washer
8
Truss head screw
4
For wide /
Flare
2
For unit & PVC
tube connection
1/8"(T3)
narrow tube
connection
Drain hose
1
2
2
4
4
4
insulation
set
3/16"(T5)
5-1/2"(L140)
For wide /
narrow tube /
flare nut connection
For drain hose
connection
Insulation tape
Vinyl tie
2
8
1
1
1
2
1
Hose band
3/32"(T2)
For flare / drain
insulating
connection
Truss-head Phillips
5/32 5/8"
(4 16mm)
Tapping screw
Cushion rubber
Truss head screw
Packed in the
outdoor unit
Drain hose
insulation
For drain tube
connection
13/32"(T10)
Remote
controller
5/32 15/32"
(4 12mm)
Packed in the
ceiling panel
Remote control
holder
Special screw
3/16 1-9/16"
(5 40mm)
AAA alkaline
battery
Use M10 or 3/8" for suspension bolts.
Suspension bolts and nuts (locally purchased)
Full-scale
installation
diagram
Printed on
container box
1-3. Optional Copper Tubing Kit
Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide
tubing, fittings and insulation. Consult your nearest sales outlet or air conditioning workshop.
1-4. Type of Copper Tube and Insulation Material
If you wish to purchase these materials separately from a local source, you will need:
1. Deoxidized annealed copper tube for refrigerant tubing as detailed in Table 2.
Cut each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to dampen vibration between units.
2. Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing. Wall thickness
of the insulation should be not less than 5/16" (8 mm).
3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. Refer to 3-7. Wiring
Instructions for details.
CAUTION
Table 2
Check local electrical codes
Narrow Tube
Wide Tube
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.
Model
Outer Dia.
Thickness
Outer Dia.
3/8" (9.52 mm)
Thickness
CS-KS12NB41
1/4" (6.35 mm)
1/4" (6.35 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm)
CS-KS18NB4UW
0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)
4
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1-5. Additional Materials Required for Installation
1. Refrigeration (armored) tape
2. Insulated staples or clamps for connecting wire
(See local codes)
3. Putty
4. Refrigeration lubricant
5. Clamps or saddles to secure refrigerant tubing
2. Installation Site Selection
2-1. Indoor Unit
To prevent abnormal heat genera-
WARNING
tion and the possibility of fire, do
not place obstacles, enclosures
and grilles in front of or surround-
ing the air conditioner in a way
that may block air flow.
AVOID:
3.3 ft.
(1m)
3.3 ft.
(1m)
ꢁ direct sunlight.
ꢁ nearby heat sources that may affect performance of the unit.
ꢁ areas where leakage of flammable gas may be expected.
ꢁ places where large amounts of oil mist exist.
3.3 ft.
(1m)
3.3 ft.
(1m)
3.3 ft.
(1m)
DO:
Fig. 1
ꢁ select an appropriate position from which every corner of
the room can be uniformly cooled.
Indoor unit
ꢁ select a location that will hold the weight of the unit.
ꢁ select a location where tubing and drain hose have the
shortest run to the outside.
ꢁ allow room for operation and maintenance as well as unre-
stricted air flow around the unit. (Fig. 1)
Outdoor unit
ꢁ install the unit within the maximum elevation difference (H)
above or below the outdoor unit and within a total tubing length
(L) from the outdoor unit as detailed in Table 3 and Fig. 2.
Fig. 2
ꢁ install the indoor unit more than 3.3' (1 m) away from any
antenna or power lines or connecting wires used for television,
radio, telephone, security system, or intercom. Electrical noise
from any of these sources may affect operation.
CAUTION
Air delivery will be degraded if the distance
from the floor to the ceiling is greater than
10 ft. (3 m).
Table 3
Max. Allowable Tubing
Length at Shipment
(ft.)
Limit of Tubing
Length (L)
(ft.)
Limit of Elevation
Difference (H)
(ft.)
Required Amount of
Additional Refrigerant
(oz./ft.)*
Model
CS-KS12NB41
25
25
65
23
50
0.16
0.27
CS-KS18NB4UW
100
* If total tubing length becomes 25 to 65 ft. (Max.) or 25 to 100 ft. (Max.), charge additional refrigerant (R410A) by 0.16 or 0.27 oz./ft.
No additional charge of compressor oil is necessary. For more detailed charging information, refer to the Technical & Service Manual.
5
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2-2. Outdoor Unit
Exhaust fan
NO
AVOID:
Hot air
Heat source
ꢁ heat sources, exhaust fans, etc. (Fig. 3)
ꢁ damp, humid or uneven locations.
Outdoor unit
DO:
ꢁ choose a place as cool as possible.
ꢁ choose a place that is well ventilated.
Fig. 3
ꢁ install in a location where at least two sides are unob-
structed, so that the flow of air at the intake port or
exhaust port is not blocked, and so that sufficient
space is ensured for maintenance to be carried out
without trouble. In general the top also must be unob-
structed. (Figs. 4a and 4b)
(CU-KS12NK1A)
Obstacle above
Min.
Min.
7' (2 m)
7' (2 m)
Air intake
Min. 2" (5 cm)
Valve
side
ꢁ provide a solid base (level concrete pad, concrete
block, 4" ꢀ 1'4" (10 ꢀ 40 cm) beams or equal), a mini-
mum of 4" (10 cm) above ground level to reduce
humidity and protect the unit against possible water
damage and decreased service life. (Fig. 5a)
Min. 10"
(25 cm)
Min.
Air discharge
Min.
2" (5 cm)
8" (20 cm)
ꢁ install cushion rubber under unit’s feet to reduce
Ground
Min. 2" (5 cm)
Air intake
vibration and noise. (Fig. 5b)
Fig. 4a
ꢁ use lug bolts or equal to bolt down unit, reducing
vibration and noise.
(CU-KS18NKU, CU-KS18NKUA)
Obstacle above
Min.
ꢁ install in a location where no antenna of a television
or radio exists within 10' (3 m).
Min.
7' (2 m)
7' (2 m)
Air intake
Min. 4" (10 cm) Valve
side
Min. 10"
(25 cm)
Min.
Air discharge
Min.
2" (5 cm)
1'4" (40 cm)
Ground
Min. 4" (10 cm)
Air intake
Fig. 4b
Anchor bolts
(4 pcs.)
Min. 4" (10 cm)
Air intake
Concrete
or equal
Cushion rubber
Fig. 5a
Fig. 5b
6
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2-3. Baffle Plate for the Outdoor Unit
(Low Ambient Cooling models only)
Air intake baffle
Wind
NOTE
It is recommended to use baffle plates for models
CU-KS12NK1A and CU-KS18NKUA. The baffle plates
are not normally required for the other models.
Front
When the outdoor unit is installed in a position exposed
to strong wind (such as seasonal winds with low air tem-
perature in winter), baffle plates must be installed on the
outdoor unit. (Fig. 5c)
Back
Wind
This unit is designed so that the fan of the outdoor unit
runs at low speed when the air conditioner is operated at
low outdoor air temperatures. When the outdoor unit is
exposed to strong wind, the system pressure drops
because of the freeze protector.
No air intake baffle
required on
Air discharge baffle
Install a pair of windbaffle plates at the front and back of
the outdoor unit if it will be subject to strong wind during
the winter. (Figs. 5c to 5k)
this side.
Fig. 5c
7
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ꢀ CU-KS12NK1A
(1) Recommended dimensions of the baffle plates
Air Intake Baffle
Air Discharge Baffle
N
H
J
A
I
J
B
H
2- 15/64"
(2- 6 mm)
C
K
M
2- 1/4"
G
4- 1/4"
(2- 6.5 mm)
(4- 6.5 mm)
L
Q
K
P
C
E
G
I
E
F
A
G
D
D
B
F
Fig. 5d
Fig. 5e
For Air Intake
Dimensions
A
B
C
D
E
F
G
H
I
J
K
N
P
Q
Model
(inch) 21-21/32 25/32 2-5/32 17-5/16
13
25/64 19/32 23/64 19/64 17-3/8 25/64 5-29/32 25/32 25/32
CU-KS12NK1A
(mm)
550
20
55
440
330
10
15
9
7.5
441
10
150
20
20
For Air Discharge
Dimensions
Model
A
B
C
D
E
F
G
H
I
J
K
L
M
(inch) 19-3/32 20-3/32 13-25/32 5-29/32 17-17/32 25/32 2-5/32 14-9/16 2-3/4 3-11/32 19/32
(mm) 485 510 350 150 445 20 55 370 70 85 15
1-3/8
35
1-3/8
35
CU-KS12NK1A
Material to be used: Metal plate with corrosion protection treatment
Plate thickness: 0.0394 to 0.0472" (1.0 to 1.2 mm)
(2) Parts required (locally purchased except for screws)
Air Intake Baffle
Air Discharge Baffle
Item
Q’ty
1
Remarks
Item
Q’ty Remarks
Baffle plate
Baffle plate
1
4
4
4
4
Screw 5/32 ꢀ 15/32" (4 ꢀ 12 mm) tapping
Bolt 15/64 ꢀ 19/32 – 25/32" (M6 ꢀ 15 – 20 mm)
Nut 15/64" (M6)
2
Attached to outdoor unit
Bolt 15/64 ꢀ 13/32 – 19/32" (M6 ꢀ 10 – 15 mm)
2
Nut 15/64" (M6)
Washer
2
Washer
2
Spring washer
Spring washer
2
8
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ꢀ CU-KS18NKUA
(1) Recommended dimensions of the baffle plates
Air Intake Baffle
Air Discharge Baffle
H
O
A
2- 15/64"
(2- 6 mm)
I
J
B
H
C
J
K
3- 1/4"
(3- 6.5 mm)
4- 1/4"
(4- 6.5 mm)
G
G
C
E
R
L
Q
I
E
A
D
K
F
F
D
B
G
Fig. 5f
Fig. 5g
For Air Intake
Dimensions
A
B
C
D
E
F
G
H
I
J
K
L
O
Q
R
Model
(inch) 24-13/32 25/32 1-25/32 22-1/4 9-1/4
9-1/4
235
25/64 25/32 19/32 23-1/8 19/64 25/64 5-29/32 25/32 25/32
CU-KS18NKUA
(mm)
620
20
45
565
235
10
20
15
587
7.5
10
150
20
20
For Air Discharge
Dimensions
Model
A
B
C
D
E
F
G
H
I
J
K
(inch) 20-7/8 22-1/16 13-25/32 5-29/32 18-1/8 1-3/8 2-5/32 17-5/16 2-3/8 3-11/32 31/32
(mm) 530 560 350 150 460 35 55 440 60 85 25
CU-KS18NKUA
Material to be used: Metal plate with corrosion protection treatment
Plate thickness: 0.0394 to 0.0472" (1.0 to 1.2 mm)
(2) Parts required (locally purchased except for screws)
Air Intake Baffle
Air Discharge Baffle
Item
Q’ty
1
Remarks
Item
Q’ty Remarks
Baffle plate
Baffle plate
1
4
4
4
4
Screw 5/32 ꢀ 15/32" (4 ꢀ 12 mm) tapping
Bolt 15/64 ꢀ 19/32 – 25/32" (M6 ꢀ 15 – 20 mm)
Nut 15/64" (M6)
2
Attached to outdoor unit
Bolt 15/64 ꢀ 13/32 – 19/32" (M6 ꢀ 10 – 15 mm)
3
Nut 15/64" (M6)
Washer
3
Washer
3
Spring washer
Spring washer
3
9
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(3) Installation procedure
ꢀ CU-KS12NK1A
1. Air Intake Baffle
2. Air Discharge Baffle
1. Remove the panels front, side L and R from the unit
and drill 4 holes of ø1/4 inch (6.5 mm) at the
prescribed positions.
(1) Left side
1. Remove the front panel from the unit.
2. Remove the panel side L, and drill 2 holes of ø1/4 inch
(6.5 mm) at the prescribed position.
2. Install the windbaffle on the unit using field supply
bolts and nuts.
3. Install the windbaffle on the unit using field supply bolts
and nuts.
3. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts
is between 13/32 – 19/32 inch (10 – 15 mm).
4. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
4. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts is
between 19/32 – 25/32 inch (15 – 20 mm).
5. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
(2) Right side
1. Remove the front panel from the unit.
2. Use 2 preholes on the panel side R to install the baffle
plate.
3. Remove the panel side R from the unit by removing the
screws. These screws are used in step 4 below.
4. Put (sandwich) the windbaffle between the unit and the
panel side R, then install the windbaffle on the unit using
the above screws. Be careful not to damage the screw
holes.
Panel front
Panel side R
Panel front
Panel side R
Panel side L
Panel side L
Fig. 5h
Fig. 5i
NOTE
ꢁ In order to prevent contact of the bolts and heat exchanger and other parts inside the unit, install the windbaffle using
bolts from inside the unit and fasten the bolts with nuts from outside the unit.
ꢁ When the windbaffle is installed on the unit, the unit has higher wind resistance. In order to prevent the unit from
falling over, anchor the legs of the unit using anchor bolts (or similar method).
10
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ꢀ CU-KS18NKUA
1. Air Intake Baffle
2. Air Discharge Baffle
1. Remove the panels front, top, side L and R from the
unit and drill 4 holes of ø1/4 inch (6.5 mm) at the
prescribed positions.
(1) Left side
1. Remove the top panel from the unit.
2. Remove the panel side L, and drill 3 holes of ø1/4 inch
(6.5 mm) at the prescribed positions.
3. Install the windbaffle on the unit using field supply bolts
and nuts.
2. Install the windbaffle on the unit using field supply
bolts and nuts.
3. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts
is between 13/32 – 19/32 inch (10 – 15 mm).
4. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
4. Recommended bolts to be used are 15/64" (M6 ISO
standard), and the recommended length of the bolts is
between 19/32 – 25/32 inch (15 – 20 mm).
5. Use washers and spring washers to tightly fasten the
windbaffle to the unit.
(2) Right side
1. Remove the top panel from the unit.
2. Use 2 preholes on the panel side R to install the baffle plate.
3. Remove the panel side R from the unit by removing the
screws. These screws are used in step 4 below.
4. Put (sandwich) the windbaffle between the unit and the
panel side R, then install the windbaffle on the unit using the
above screws. Be careful not to damage the screw holes.
Panel side R
Panel top
Panel top
Panel front
Panel side R
Panel front
Panel side L
Panel side L
Fig. 5j
Fig. 5k
NOTE
ꢁ In order to prevent contact of the bolts and heat exchanger and other parts inside the unit, install the windbaffle using
bolts from inside the unit and fasten the bolts with nuts from outside the unit.
ꢁ When the windbaffle is installed on the unit, the unit has higher wind resistance. In order to prevent the unit from
falling over, anchor the legs of the unit using anchor bolts (or similar method).
(4) Precautions for installation
1. Be sure not to damage painted surfaces.
2. Finish the edges of the windbaffle to avoid cuts or injury.
3. Drilling of holes must be carefully done so that no damage is caused to external or internal parts of the unit.
Particular care must be taken that drill chips do not drop into the unit.
11
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Hole-in-anchor
Hole-in-plug
3. How to Install the Indoor Unit
Concrete
Insert
3-1. Preparation for Suspending
This unit uses a drain pump. Use a carpenter’s level to
check that the unit is level.
3-2. Suspending the Indoor Unit
Suspension bolt (M10 or 3/8")
(locally purchased)
(1) Fix the suspension bolts securely in the ceiling using
the method shown in the diagrams, by attaching
them to the ceiling support structure, or by any other
method that ensures that the unit will be securely
and safely suspended. (Fig. 6-1)
Fig. 6-1
23-5/8"(600mm
Ceiling opening dimensions
21-1/32"(534mm
Suspension bolt pitch
)
)
(2) Follow the diagram to make the holes in the ceiling.
(3) Determine the pitch of the suspension bolts using
the supplied full-scale installation diagram. The dia-
gram shows the relationship between the positions
of the suspension fitting, unit, and panel. (Fig. 6-2)
3-3. Placing the Unit Inside the Ceiling
22-5/8"(575mm
6-5/16" 6-11/16"
(160mm (170mm
)
(1) Be sure to remove the fan protection (4pcs) for
transportation before hanging up the indoor unit.
Drain tube
connection port
2-3/32"
(53mm
(outer dia 1-1/32"( 26mm))
)
)
)
(2) When placing the unit inside the ceiling, determine
the pitch of the suspension bolts using the supplied
full-scale installation diagram. (Fig. 6-3)
Tubing and wiring must be laid inside the ceiling
when suspending the unit. If the ceiling is already
constructed, lay the tubing and wiring into position
for connection to the unit before placing the unit
inside the ceiling.
Power supply port
Refrigerant tubing joint
(narrow tube side)
1/4( 6.35mm) (flared)
Fig. 6-2
(3) The length of suspension bolts must be appropriate
for a distance between the bottom of the bolt and the
bottom of the unit of more than 19/32" (15 mm) as
shown in the diagram. (Fig. 6-3)
(4) Thread the 3 hexagonal nuts (locally purchased) and
2 supplied washers onto each of the 4 suspension
bolts as shown in the diagram. Use 1 nut and 1
washer for the upper side, and 2 nuts and 1 washer
for the lower side, so that the unit will not fall off the
suspension lugs. (Fig. 6-4)
Full-scale installation diagram
(printed on top of container box)
Supplied screw
Fig. 6-3
Suspension bolt
(5) Adjust so that the distance between the unit and the
ceiling bottom is 1/2" (13 mm) to 23/32" (18 mm).
Tighten the nuts on the upper side and lower side of
the suspension lug. (Fig. 6-4)
Suspension lug
Nuts and washers
(used for upper and lower)
Notch
Double nut
1/2" – 23/32"
(13~18mm
)
Fig. 6-4
12
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3-4. Installing the Drain Piping
Twist tie
(4 vinyl ties, supplied)
(1) Prepare standard hard PVC pipe (locally purchased O.D.
1-1/32" (26 mm)) for the drain and use the supplied hose
band to prevent water leaks. (Fig. 6-5)
Hard PVC pipe
(equivalent to
O.D. 1-1/32" (26mm))
(locally purchased)
Drain hose
insulation
(supplied)
Position to
fasten hose
bands
Drain port
(2) To install the drain hose, first place 1 of the 2 hose bands
over the unit drain port and the other hose band over the
hard PVC pipe (not supplied). Then connect both ends of
the supplied drain hose. (Fig. 6-5)
Drain hose
(supplied)
(3) On the unit drain side, grasp the hose band with pliers
and insert the drain hose all the way to the base.
3/16"
3/16"
(5mm
15/16"
(25mm
(5mm
)
)
ꢁ If other commercially available hose bands are used, the
drain hose may become pinched or wrinkled and there is
danger of water leakage. Therefore be sure to use the
supplied hose bands. When sliding the hose bands, be
careful to avoid scratching the drain hose.
15/16"
Hose band
(2 bands, supplied)
(25mm
)
)
5-1/2"(140mm
)
Unit
Fig. 6-5
ꢁ Do not use adhesive when connecting the supplied drain
hose to the drain port (either on the main unit or the PVC
pipe).
ꢁ Attach so that the hose band
fastener is on the side of the
drain port.
ꢁ Attach the hose bands so that
each is approximately 3/16"
(5 mm) to 15/16" (25 mm) from
the end of the supplied drain
hose.
CAUTION
Reasons: a) It may cause water to leak from the connec-
tion. Since the connection is slippery just
after the adhesive has been applied, the
pipe easily slips off.
b) The pipe cannot be removed when mainte-
nance is needed.
(4) Wrap the hose with the supplied drain hose insulation
and use the 4 twist ties so that the hose is insulated with
no gaps.
Air bleeder prohibited
ꢁ Do not bend the supplied drain hose 90° or more. The
hose may slip off.
NOTE
Fig. 6-6
Make sure the drain pipe has a downward gradient (1/100 or
more) and that there are no water traps.
ꢁ Do not install an air bleeder as
this may cause water to spray
from the drain pipe outlet.
(Fig. 6-6)
CAUTION
CAUTION
ꢁ In cases where it is necessary to raise the height of the
drain piping, the drain piping can be raised to a maximum
height of 2.78 ft. (850 mm) above the bottom surface of
the ceiling. Under no conditions attempt to raise it higher
than 2.78 ft. (850 mm) above the bottom surface of the
ceiling. Doing so will result in water leakage. (Fig. 6-7)
ꢁ Do not use natural drainage.
1 ft.(300mm) or less
2.78 ft.(850mm) or less
0 - 45
* Length of supplied drain hose = 5-1/2"(140mm
)
Fig. 6-7
ꢁ Do not install the pipe with an upward gradient from the
connection port. This will cause the drain water to flow
backward and leak when the unit is not operating.
(Fig. 6-8)
Uphill slope
ꢁ Do not apply force to the piping on the unit side when
connecting the drain pipe. The pipe should not be
allowed to hang unsupported from its connection to the
unit. Fasten the pipe to a wall, frame, or other support as
close to the unit as possible. (Fig. 6-9)
Fig. 6-8
Support
bracket
ꢁ Provide insulation for any pipes that are run indoors.
Fig. 6-9
13
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Water drain
3-5. Checking the Drainage
After wiring and drain piping are completed, use the following pro-
cedure to check that the water will drain smoothly. For this, pre-
pare a bucket and wiping cloth to catch and wipe up spilled water.
ꢁ Be sure to do the wiring between the units before installing the
ceiling panel. (Refer to 3-9. Wiring Instructions for Inter-unit
Connections)
(1) Turn on the power. (Here, “power” refers to the power supply
from the outdoor unit.)
Over 4"
(100mm
)
Control box
(2) Slowly pour approx. 16 ounces (500 ml) of water into the drain
pan to check drainage. (Fig. 6-10a)
(3) Remove the 2 screws from the control box cover, then open
the cover. Be careful not to drop the cover at this time.
(4) Disconnect the FS 3P connector (red) on the control PCB and
operate the drain pump. (Fig. 6-10b) Check the water flow
through the transparent drain pipe and see if there is any
leakage.
Plastic container
for water intake
Drain pan outlet
Water
(Approx. 16 ounces (500m ) )
Fig. 6-10a
Control box
FLAP
(5) When the check of drainage is complete, reconnect the FS
3P connector and remount the control cover.
The drain pump will continue to
FS
IND RC
CAUTION
operate for a minimum of 6 min-
utes after the FS 3P connector is
reconnected.
Fig. 6-10b
must be within the range of 1/2"(13mm) to 23/32"(18mm). (Fig. 6-11)
If not within this range, malfunction or other trouble may occur.
A
3-6. How to Install the Ceiling Panel
Indoor unit
Checking the unit position
A
Ceiling opening
dimension
(1) Check that the ceiling hole is 23-5/8" (600 mm) ꢀ 23-5/8"
(600 mm) (Fig. 6-11)
Ceiling side
Latch
(2) Confirm that the position of the indoor unit and the ceiling
as shown in the diagram. If the positions of the ceiling sur-
face and unit do not match, air leakage, water leakage, flap
operation failure, or other problems may occur. (Fig. 6-11)
Fig. 6-11
Flap
NO
CAUTION
ꢁ Never place the panel face-down. Neither hang it ver-
tically nor place it on top of a projecting object. Plac-
ing it face-down will damage the surface.
Fig. 6-12
Fig. 6-13
Ceiling panel
Air-intake grille
ꢁ Do not touch the flap or apply force to it. (This may
cause flap malfunction.) (Fig. 6-12)
1
1
3-6-1. Before Installing the Ceiling Panel
(1) Remove the air-intake grille and air filter from the ceiling
panel.
Air-intake grille hinge
a) Press on and slide the two latches of the air-intake grille
Fig. 6-14
with your thumb in the direction shown by the arrow
to open the grille. (Figs. 6-13 and 6-14)
1
2
b) With the air-intake grille opened, remove the grille hinge
from the ceiling panel by sliding it in the direction shown
by the arrow 2 . (Fig. 6-15)
Fig. 6-15
14
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(2) Removing the corner cover and
indicator cover
a) While lightly pressing the cen-
ter of the corner cover, pull up
the tab for the screw hole.
Use the same procedure to
remove the indicator cover.
(Fig. 6-16)
1
Corner cover
Press
2 Pull up
Indicator cover
Fig. 6-16
3-6-2. Installing the Ceiling Panel
Temporary latches
(1) Hang the temporary latches on the inside of the ceil-
ing panel to the receptacle on the unit to temporarily
attach the ceiling panel in place. (Fig. 6-17)
Temporary
latch
ꢁ The ceiling panel must be installed in the correct
direction relative to the unit. Align the REF. PIPE and
DRAIN marks on the ceiling panel corner with the
correct positions on the unit.
Fig. 6-17
Refrigerant tubing joint
Drainage check
(2) Align the panel installation holes and the unit screw
holes. (Fig. 6-18)
(3) Tighten the supplied special screws at the 4 panel
installation locations so that the panel is attached
tightly to the unit.
ꢁ Check that the wiring connectors are not caught
REF.PIPE mark
Ceiling panel
between the unit and the ceiling panel.
DRAIN mark
(4) Check that the panel is attached tightly to the ceiling.
(Fig. 6-19)
ꢁ At this time, make sure that there are no gaps
between the unit and the ceiling panel, or between
the ceiling panel and the ceiling surface.
Panel installation hole
(4 locations)
Special screws
ꢁ If there is a gap between the panel and the ceiling,
leave the ceiling panel attached and make fine
adjustments to the installation height of the unit to
eliminate the gap with the ceiling.
Fig. 6-18
Do not allow
gaps
Indoor unit
Ceiling surface
Ceiling panel
CAUTION
Fig. 6-19
If the screws are not sufficiently tightened,
trouble such as that shown in the figure
below may occur. Be sure to tighten
the screws securely.
If a gap remains between the ceiling
surface and the ceiling panel even
after the screws are tightened,
The height of the unit can be adjusted from the ceiling
panel corner hole, with the ceiling panel attached, to
an extent that does not affect the unit levelness,
the drain hose, or other elements.
adjust the height of the unit again.
Air leakage
Air leakage from
ceiling surface
Staining
Adjust so that there are no gaps.
Condensation, water leakage
Fig. 6-20
15
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3-6-3. Wiring the Ceiling Panel and the Indicator
Drain pipe side
(1) Remove the 2 screws from the control box cover, then open
the cover. Be careful that the cover does not fall.
(2) Connect the 5P FLAP wiring connector from the ceiling
panel to the connector on the control PCB in the control box.
(Fig. 6-21)
Control box
Refrigerant tube side
(3) Connect the 7P IND and 4P RC wiring connector from the
indicator to the connectors on the control PCB in the control
box. (Fig. 6-21)
Indicator cover
Power box
As to how to attach the indicator cover, refer to Fig.6-23.
(4) Be sure to use the clamps to fasten the connector wires in
place. (Fig. 6-21)
Fig. 6-22
Indoor unit
Ceiling panel
(5) Tighten the 2 cover screws to
7P IND and 4P RC
wiring connector
Indicator
5P FLAP wiring connector
close the cover.
Clamps
ꢁ Check that the wiring
connectors are not caught
between the electrical
4P
5P
component box and the cover.
ꢁ If the indicator connector is
not securely connected,
the remote controller
signal will not be
5P FLAP
wiring connector
7P
received.
ꢁ If the connectors are not
connected, the auto flap will not
operate. Be sure
7P IND and 4P RC wiring connector
to connect them securely.
Control box
Indicator
* Pass the wiring connectors through the clamps to fasten them in place,
as shown in the figure.
Fig. 6-21
3-6-4. How to Attach the Corner Cover and Air-Intake Grille
A. Attaching the corner cover
Pin
(1) Check that the safety strap from the corner cover is fas-
tened to the ceiling panel pin, as shown in the figure.
(Fig. 6-23)
(2) Use the supplied screws to attach the corner cover to the
ceiling panel.
B. Attaching the air-intake grille
Place the corner cover so that the 3 tabs
fit into the holes in the ceiling panel.
Then fasten it in place with the supplied screws.
ꢁ To install the air-intake grille, follow the steps for 3-6-1.
Before Installing the Ceiling Panel in the reverse order.
By rotating the air-intake grille, it is possible to attach the
Fig. 6-23
grille onto the ceiling panel
from any of 4 directions.
Hole for ceiling
panel hook
(Fig. 6-25)
* The grille can be installed
with these hinges facing
in any of 4 directions.
ꢁ When attaching the air-intake
grille, be careful that the flap
and the indicator wiring do
not become caught.
ꢁ Be sure to attach the safety
Can be installed rotated 90
cord that prevents the air-intake
Hook that prevents
the grille from
dropping
grille from dropping off to the
ceiling panel unit as shown
in Fig. 6-24.
Fig. 6-24
Fig. 6-25
16
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3-6-5. Checking After Installation
ꢁ Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling sur-
face. Gaps may cause water leakage and condensation.
ꢁ Check that the wiring is securely connected.
If it is not securely connected, the auto flap will not operate. In addition, water leakage and condensation may occur.
3-6-6. When Removing the Ceiling Panel for Servicing
When removing the ceiling panel for servicing, remove the air-intake grille and air filter, disconnect the flap and the indi-
cator wiring connectors inside the control box, and then remove the 4 mounting screws.
3-6-7. Adjusting the Auto Flap
The air-direction flap on the ceiling panel outlet can be adjusted as follows.
ꢁ Adjust the flap to the desired angle using the remote controller. The flap also has an automatic air-sweeping mecha-
nism.
NOTE
ꢁ Never attempt to move the flap by hand.
ꢁ Proper air flow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or
heating seems inadequate, try changing the direction of the air flow.
3-7. Wiring Instructions
General precautions on wiring
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate,
then carry out the wiring closely following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each unit, with a power supply
disconnect and circuit breaker for overcurrent protection provided in the exclu-
sive line.
(3) To prevent possible hazards due to insulation failure, the unit must be grounded.
(4) Each wiring connection must be done tightly and in accordance with the wiring
system diagram. Wrong wiring may cause the unit to misoperate or become
damaged.
(5) Do not allow wiring to touch the refrigerant tubing, compressor, or any moving
parts of the fan.
(6) Unauthorized changes in the internal wiring can be very dangerous. The manu-
facturer will accept no responsibility for any damage or misoperation that occurs
as a result of such unauthorized changes.
3-8. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality. For field wiring require-
ments, please refer to your local electrical codes. Carefully observe these regula-
tions when carrying out the installation.
Table 4 lists recommended wire lengths and diameters for power supply systems.
NOTE
Refer to the wiring system diagram (Fig. 7a or Fig. 7b) for the meaning of (A), (B)
and (C) in Table 4.
Refer to your local codes or in the absence of local codes see the National Electric
Code: ANSI/NFPA70.
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Table 4
Cross-Sectional
Area (AWG)
(A)+(B)
(A) Power Supply Wiring Length (ft)
(B) Power Line Length (ft)
(C) Control
Line Length (ft)
Fuse or Circuit
Breaker Capacity
Model
(#14)
(#12)
(#14)
CU-KS12NK1A
131 (Max.)
131 (Max.)
230 (Max.)
230 (Max.)
65 (Max.)
100 (Max.)
20A
15A
CU-KS18NKU, CU-KS18NKUA
# ... AWG (American Wire Gauge)
WIRING SYSTEM DIAGRAM
(CU-KS12NK1A)
WARNING
INDOOR
OUTDOOR
Disconnect
switch
Field supply
*
UNIT
UNIT
ꢁ Be sure to comply with local codes on running the
wire from the indoor unit to the outdoor unit (size
of wire and wiring method, etc.).
Terminal
Terminal
(B)
115V
115V
115V
1
2
3
1
2
3
4
5
6
ꢁ Each wire must be firmly connected.
ꢁ No wire should be allowed to touch refrigerant
tubing, the compressor, or any moving part.
(C)
(A)
L
Grounding line
N
(B)
WARNING
Grounding
line
ꢁ To avoid the risk of electric shock, each air
conditioner unit must be grounded.
Fig. 7a
ꢁ For the installation of a grounding device,
please observe local electrical codes.
ꢁ Grounding is necessary, especially for units
using inverter circuits, in order to release
charged electricity and electrical noise caused
by high tension.
Otherwise, electrical shock may occur.
ꢁ Place a dedicated ground more than 7' (2 m)
away from other grounds and do not have it
shared with other electric appliances.
(CU-KS18NKU, CU-KS18NKUA)
INDOOR
OUTDOOR
UNIT
Disconnect
switch
Field supply
*
UNIT
Terminal
Terminal
(B)
230/208V
1
2
3
1
2
230/208V
230/208V
3
4
5
6
(C)
(A)
L1
Grounding line
L2
(B)
Grounding
line
CAUTION
Fig. 7b
ꢁ Be sure to connect the power supply line to the
outdoor unit as shown in the wiring diagram. The
indoor unit draws its power from the outdoor unit.
ꢁ Do not run wiring for antenna, signal, or power
lines of television, radio, stereo, telephone, secu-
rity system, or intercom any closer than 3'3" (1 m)
from the power cable and wires between the
indoor and outdoor units. Electrical noise may
affect the operation.
NOTE
*
A disconnect switch may be required by
national or local codes.
CAUTION
Always comply with national and local code
requirements.
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3-9. Wiring Instructions for Inter-unit Connections
(1) Remove the 1 screw from the terminal cover, then open the
cover. Be careful that the cover does not fall.
(2) Remove the 3 screws from the power box cover, then open
the cover. Be careful that the cover does not fall.
(3) Use the screw to securely fasten the ground wire from the
outdoor unit in place.
(4) Remove the transparent plastic cover from the 3P terminal
plate.
(5) While viewing the wiring diagram, connect the inter-unit and
power supply line to terminals 1, 2 and 3 on the 3P terminal
plate.
Power wiring
(Locally purchased)
Clamping strap
Earth screw
(6) Remount the transparent plastic cover onto the 3P terminal
plate.
(7) Be sure to use the clamping strap to fasten the wires in place.
Inter unit
(8) Tighten the screws to remount the terminal and the power
box cover.
(Conduit)
Fig. 8
Loose wiring may cause the ter-
WARNING
minal to overheat or result in unit
malfunction. A fire hazard may
also exist. Therefore, be sure all
wiring is tightly connected.
When connecting each power wire to the corresponding terminal, fol-
low the instructions “How to connect wiring to the terminal” and fasten
the wire securely tight with the fixing screw of the terminal plate.
How to connect wiring to the terminal
a) For Indoor Unit
9/32"
(7 mm)
(ACTUAL
SIZE)
STRIP
SIZE
(1) Cut the wire end with a cutting pliers, then strip the insulation to
expose the wire about 9/32" (7 mm). See the label (Fig. 9) near the
terminal plate.
Fig. 9
(2) Using a screwdriver, loosen the terminal screw on the terminal
plate.
(3) Insert the wire and tighten the terminal screw completely using a
screwdriver.
b) For Outdoor Unit
Solid wire
Loop
ꢀ For solid core wiring (or F-cable)
(1) Cut the wire end with a cutting pliers, then strip the insulation to
expose the solid wire about 15/16" (25 mm). (Fig. 10)
(2) Using a screwdriver, remove the terminal screw(s) on the terminal
plate.
Insulation
Fig. 10
(3) Using the pliers, bend the solid wire to form a loop suitable for the
terminal screw.
(4) Shape the loop wire properly, place it on the terminal plate and fix
it securely with the removed terminal screw using a screwdriver.
19
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ꢀ For stranded wiring
(1) Cut the wire end with a cutting pliers, then strip the insulation to expose the stranded wiring about 3/8" (10 mm) and
tightly twist the wire ends. (Figs. 11 and 12)
(2) Using a screwdriver, remove the terminal screw(s) on the terminal plate.
(3) Using a ring connector fastener or pliers, securely clamp each stripped wire end with a ring connector. (Fig. 11)
(4) Place the ring connector wire, and replace and tighten the removed terminal screw using a screwdriver. (Fig. 13)
Special
washer
Screw
Twist wire ends
Stranded wire
Screw and
special washer
Ring connector
Terminal plate
Ring
Ring
Wire
connector
connector
Wire
Fig. 11
Fig. 12
Fig. 13
4. How to Install the Outdoor Unit
First refer to Section 2. Installation Site Selection.
Lock nut
Cabinet
4-1. Wiring Instructions for the Outdoor Unit
Regulations on wire size differ from locality to locality.
For field wiring requirements, please refer to your
local electrical codes. Make sure that the installation
fully complies with all local and national regulations.
Terminal
block
(1) Remove access panel “C”. (Fig. 14)
(2) Connect the inter-unit and power supply line
according to the drawing on the panel side.
Conduit
plate
(3) Be sure to size each wire allowing approx. 4"
(10 cm) longer than the required length for
wiring. Store excess wiring inside the cabinet.
Access panel “C”
(4) When connections are completed, check that all
connections are correct as shown in the wiring
system diagram on panel side.
Plug
Inter unit
(Conduit)
Power supply
(Conduit)
(5) Be sure to ground the unit according to your
local codes.
Fig. 14
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Deburring
5. Refrigerant Tubing
After
Before
5-1. Use of the Flaring Method
Many of the conventional split system air conditioners
employ the flaring method to connect refrigerant tubes
which run between indoor and outdoor units. In this
method, the copper tubes are flared at each end and
connected with flare nuts.
5-2. Flaring Procedure with a Flare Tool
(1) Cut the copper tube to the required length with a
tube cutter. It is recommended to cut approx. 12" to
20" (30 to 50 cm) longer than the tubing length you
estimate.
Fig. 15
Copper
tubing
(2) Remove burrs at the end of the copper tube with a
tube reamer or file. This process is important and
should be done carefully to make a good flare.
(Fig. 15)
Reamer
NOTE
When reaming, hold the tube end downward and be
sure that no copper scraps fall into the tube. (Fig. 16)
Fig. 16
(3) Remove the flare nut from the unit and be sure to
mount it on the copper tube.
If the previous flare tool
(clutch-type) is used:
If the special R410A
flare tool is used:
(4) Make a flare at the end of copper tube with a flare
0.0472" (1.2 mm)
tool.* (Figs. 17 and 18)
0 to 0.0196"
(0 to 0.5 mm)
Adjust so that the amount of tube
protrusion is as shown in the figure.
(*Use “RIDGID” or equivalent.)
NOTE
Fig. 17
A good flare should have the following characteristics:
ꢁ inside surface is glossy and smooth.
ꢁ edge is smooth.
Flare nut
Copper
tubing
ꢁ tapered sides are of uniform length.
5-3. Caution before Connecting Tubes Tightly
a) Be sure to apply a sealing cap or water-proof tape
to prevent dust or water from getting into the tubes
before they are used.
Flare tool
Fig. 18
b) Be sure to apply refrigerant lubricant to the match-
ing surfaces of the flare and union before connect-
ing them together. This is effective for reducing gas
leaks. (Fig. 19)
Apply refrigerant
lubricant here and here
Fig. 19
c) For proper connection, align the union tube and
flare tube straight with each other, then screw in the
flare nut lightly at first to obtain a smooth match.
(Fig. 20)
Flare nut
Union
Fig. 20
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5-4. Connecting Tubing between Indoor and
Outdoor Units
Torque wrench
a) Tightly connect the indoor side refrigerant tubing exten-
ded from the wall with the outdoor side tubing. (Fig. 21)
Spanner
Indoor unit
b) To fasten the flare nuts, apply specified torque as:
Outdoor unit
Table 5
Fig. 21
Tube Dia.
Nut
Tightening Torque
1/4" (6.35 mm)
3/8" (9.52 mm)
1/2" (12.70 mm)
5/8" (15.88 mm)
21/32" (17 mm)
7/8" (22 mm)
Approx. 120 – 160 lbs·in (140 – 180 kgf·cm)
Approx. 300 – 360 lbs·in (340 – 420 kgf·cm)
Approx. 430 – 480 lbs·in (490 – 550 kgf·cm)
Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)
Insulation
1-1/32" (26 mm)
1-5/32" (29 mm)
Thickness:
min. 5/16"
(8 mm)
Min.
5/16"
(8 mm)
5-5. Insulation of Refrigerant Tubing
Fig. 22
IMPORTANT
To prevent heat loss and wet floors due to dripping of con-
densation, both tubes must be well insulated with a
proper insulation material.
The thickness of the insulation should be a minimum 5/16"
(8 mm). (Fig. 22)
Insulation tape (supplied)
Flare insulation (3/16"(T5, supplied) )
Flare insulation (1/8"(T3, supplied) )
Tube insulation
(not supplied)
Flare nut
Taping the flare nuts
Vinyl tie (supplied)
Wind the insulation tape around the flare nuts at the
tube connections. Secondly cover up the tubing connec-
tions with the flare insulation (1/8" (T3, supplied)). Then
wind the other flare insulation (3/16" (T5, supplied)).
Finally, fasten the insulation at both ends with the sup-
plied vinyl ties. (Fig. 23)
Fig. 23
Drain hose insulation
and vinyl tie
(supplied)
Drain pipe and insulation
(not supplied)
Refrigerant tubing
and insulation
(not supplied)
Drain hose
and hose band
(supplied)
Insulation material
Insulation tape (supplied)
Vinyl tie (supplied)
The material used for insulation must have good insula-
tion characteristics, be easy to use, be age resistant,
and must not easily absorb moisture.
Flare
insulation (supplied)
After a tube has been insulat-
The procedure used for installing
the insulation for both wide and
narrow tubes are the same.
CAUTION
ed, never try to bend it into a
narrow curve because it can
cause the tube to break or
crack.
Fig. 24
Never grasp the drain or refrigerant connecting out-
lets when moving the unit.
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5-6. Taping the Tubes
(1) At this time, the 2 refrigerant tubes (and electrical wire
if local codes permit) should be taped together with
armoring tape. The drain hose may also be included
and taped together as 1 bundle with the tubing.
(2) Wrap the armoring tape from the bottom of the outdoor
unit to the top of the tubing where it enters the wall. As
you wrap the tubing, overlap half of each previous tape
turn. (Fig. 25)
Clamp
Drain hose
Insulated tubes
(3) Clamp the tubing bundle to wall, using 1 clamp approx.
every 47" (120 cm).
Apply putty here
NOTE
Do not wind the armoring tape too tightly, since this will
decrease the heat insulation effect. Also, be sure the con-
densation drain hose splits away from the bundle and drips
clear of the unit and the tubing.
Fig. 25
Tubing
5-7. Finishing the Installation
Fig. 26
After finishing insulating and taping over the tubing, use
sealing putty to seal off the hole in the wall to prevent rain
and draft from entering. (Fig. 26)
Indoor unit
6. Air Purging
Air and moisture remaining in the refrigerant system have
undesirable effects as indicated below. Therefore, they must
be purged completely.
Outdoor unit
ꢁ pressure in the system rises
ꢁ operating current rises
ꢁ cooling (or heating) efficiency drops
ꢁ moisture in the air may freeze and block capillary tubing
ꢁ water may lead to corrosion of parts in the refrigerant system
ꢀ Air Purging with a Vacuum Pump (for Test Run)
(1) Check that each tube (both narrow and wide tubes)
between the indoor and outdoor units have been proper-
ly connected and all wiring for the test run has been
completed. Note that both narrow and wide tube service
valves on the outdoor unit are kept closed at this stage.
Manifold valve
(Exclusively for R410A)
(2) Using an adjustable wrench or box wrench, remove the
valve caps from the service valve on both narrow and
wide tubes.
(3) Connect a vacuum pump and a manifold valve (with
pressure gauges) to the service port on the wide tube
service valve. (Fig. 27)
Lo
Hi
Pressure
gauge
The service port on the wide tube service valve
uses a Schrader core valve to access the
refrigerant system. The valve core is similar to
those used in automobile tires. Therefore, be
sure to use a vacuum hose connector which
has a push-pin inside.
CAUTION
CAUTION
Charging hose
(Exclusively for R410A)
Vacuum pump adapter
(Exclusively for R410A)
(with reverse flow prevention)
Be sure to use a manifold valve for air
purging. If it is not available, use a stop
valve (field supply) for this purpose. The
“Hi” knob of the manifold valve must
always be kept closed.
Vacuum pump
Fig. 27
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(4) With the “Lo” knob of the manifold valve open, run
the vacuum pump. The operation time for the vacu-
um pump varies with tubing length and the capacity
of the pump. The following table shows the amount
of time for evacuation:
NOTE
To prevent other refrigerants from being mistakenly
charged to units which use R410A, the size of the
charge port on the service valve is different from the
one for other refrigerant types. For servicing such as
recharging, the specified charging hose, manifold and
vacuum pump adapter (with reverse flow prevention)
for R410A must be used.
Table 6
Required time for evacuation when
26.4 gal/h (100 liter/h) vacuum pump is used
If tubing length is
If tubing length is
less than 33 ft. (10 m)
more than 33 ft. (10 m)
10 min. or more
15 min. or more
NOTE
(5) With the vacuum pump still running, close the “Lo”
knob of the manifold valve. Then stop the vacuum
pump.
The required time in Table 6 is calculated based on the
assumption that the ideal (or target) vacuum condition
is around 0.193 psi (10 mmHg abs.).
(6) With the hex wrench, turn the valve stem on the
narrow tube service valve counter-clockwise by
90 degrees (1/4 turn) for 10 seconds, and then turn
the stem clockwise to close it again. (Fig. 28)
90° (1/4 turn)
Narrow tube
Hex wrench
Wide tube
Be sure to completely insert the hex
CAUTION
wrench before attempting to turn the valve.
(7) Leak test all joints at the tubing (both indoor and outdoors) with
soapy water. Bubbles indicate a leak. Tighten the joint more
when leaks, then check if there is no leak. Be sure to wipe off the
soap with a clean cloth.
Valve cap
Vacuum hose to manifold valve
Fig. 28
(8) With the hex wrench, turn the wide tube service valve stem
counter-clockwise to fully open the valve.
(9) Turn the narrow tube service valve stem counter-clockwise to
fully open the valve.
(10) Loosen the vacuum hose connected to the wide tube service
port slightly to release the pressure. Then, remove the hose.
This may cause the refrigerant gas to
leak. In order to avoid this, take off the
hose quickly.
CAUTION
(11) Fasten the valve cap on the wide tube service port securely
with an adjustable wrench or box wrench. Next, mount the
valve cap on the service valve and tighten it to 170 lbs·in
(200 kgf·cm) with a torque wrench. This process is very
important to prevent gas from leaking from the system.
(12) Test run the air conditioner. (See next page.)
(13) While the air conditioner is running, apply liquid soap to
check for any gas leaks around the service valves or caps.
(14) If there is no leakage, stop the air conditioner.
(15) Wipe off the soap on the tubing.
This completes air purging with a vacuum pump and the air condi-
tioner is ready for actual operation.
24
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How to Test Run the Air Conditioner
After turning on the power of the air conditioner, use the
remote controller and follow the steps below to conduct
the test run.
(1) Set the remote controller in Test Run mode. (Fig. 29)
a)Press and hold the HIGH POWER button and the
1HR. TIMER button.
b)Then press and hold the ACL (Reset) button with
a pointed object such as the tip of a pen. After 5
seconds, release the ACL button first.
ON/OFF
operation
button
HIGH POWER
button
c)Then release the HIGH POWER and 1HR. TIMER
buttons.
1HR.
TIMER
button
d)
appears and “oP-1” blinking in the remote con-
troller clock display area. (Fig. 30)
(2) Start Cooling mode test run by pressing the ON/OFF
operation button of the remote controller. (Fig. 29)
‡ 7KLVꢀVWDUWVꢀWKHꢀIDQꢀSURGXFLQJꢀXQFRROHGꢀIRUFHGꢀDLU
with the 3 indicator lamps (OPERATION lamp,
TIMER lamp, and HIGH POWER lamp) on the
main unit blinking. (Fig. 31)
‡ $IWHUꢀꢆꢀPLQXWHVꢃꢀWKHꢀV\VWHPꢀVKLIWVꢀLQWRꢀFRROLQJ
operation, and cool air will start to be felt. Cooling
mode test run is unaffected by the room tempera-
ture.
ACL
(Reset)
button
Fig. 29
(3) Press the ON/OFF operation button of the remote
controller again to stop the test run. (Fig. 29)
(4) Finally press the ACL (Reset) button of the remote
controller to release it from Test Run mode to return
to normal mode. (Fig. 29)
‡ ´ µꢀDQGꢀ´R3ꢂꢇµꢀZLOOꢀGLVDSSHDUꢀIURPꢀWKHꢀUHPRWH
controller clock display area.
NOTE
Fig. 30
Troubleshooting:
In the event that the green OPERATION lamp is blinking
upon powering up the system, an error condition exists.
In this case, refer to the self-diagnostics procedure
which can be seen by opening the air-intake grille.
IMPORTANT
After the test run is completed, be sure to press the ACL
(Reset) button to return to normal mode. The air condi-
tioner will not operate correctly if this is not done.
OPERATION button
OPERATION lamp
TIMER lamp
HIGH POWER lamp
REMOTE CONTROL receiver
Fig. 31
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ꢀ Basic Functions of the Service Valves
The basic functions of the service valves are given in Table 7 below.
Table 7
Narrow Tube Service
Valve (2-Way)
Wide Tube Service
Valve (3-Way)
Action
O-ring
Valve cap
Stem
CLOSED
Shipping
Fully OPEN
Fully OPEN
CLOSED
Operating and
test running
the air conditioner
Measuring pressure
and gas charging
*
*
* The service port on the wide tube ser-
vice valve uses a Schrader core valve
to access the refrigerant system.
Therefore, be sure to use a hose con-
nector which has a push-pin inside.
(Fig. 32)
Air purging with
a vacuum pump
Service valve
Hose with push-pin
CAUTION
Close
When opening or clos-
ing the service valve
stem, use the hex
wrench. Be sure to fully
seat the wrench before
turning the valve.
PUSH
Open
Hex
wrench
NOTE
External diameter of service port
R410A: 5/16"
Fig. 33
Fig. 32
ꢀ Pump Down
Pump down means collecting all refrigerant gas in the
system back into the outdoor unit without losing any of
the gas. Pump down is used when the unit is to be
moved or before servicing the refrigerant circuit.
(2) Using a hex wrench, turn the narrow tube service
valve clockwise all the way to close the service
valve. (Be sure to confirm that the wide tube service
valve is fully open.)
(3) Press the operation button and start cooling oper-
ation.
Pump Down Procedure
Be sure to carry out pump down with the unit in
Cooling mode.
(4) When the low pressure gauge reading falls to 14.2 to
7.1 psi (1 to 0.5 kg/cm2), fully close the wide tube
valve stem. Then quickly stop the unit.
(1) Connect the Lo side charging hose of the manifold
valve to the service port on the wide tube service
valve.
(5) Disconnect all gauges and hoses, and replace the
valve caps as they were before.
26
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ꢀ Service Valve Connections
a) Temporary connection:
Screw in 3 – 5 turns by hand. (Fig. 34)
b) To fasten the flare nuts, apply specified torque
as Table 8 and Fig. 35.
Table 8
Fig. 34
Tube Dia.
Nut
Tightening Torque
1/4" (6.35 mm)
3/8" (9.52 mm)
1/2" (12.70 mm)
5/8" (15.88 mm)
21/32" (17 mm)
7/8" (22 mm)
Approx. 120 – 160 lbs·in (140 – 180 kgf·cm)
Approx. 300 – 360 lbs·in (340 – 420 kgf·cm)
Approx. 430 – 480 lbs·in (490 – 550 kgf·cm)
Approx. 590 – 710 lbs·in (680 – 820 kgf·cm)
1-1/32" (26 mm)
1-5/32" (29 mm)
Torque wrench
7. Remote Controller Installation Position
Fig. 35
The remote controller can be operated from either a
non-fixed position or a wall-mounted position.
Be sure to tighten the flare nut
using the prescribed torque. If the
nut is over-tightened, refrigerant
leakage may occur.
CAUTION
To ensure that the air conditioner operates correctly, do
not install the remote controller in the following places:
ꢁ In direct sunlight
ꢁ Behind a curtain or other place where it is covered
ꢁ More than 26' (8 m) away from the air conditioner
ꢁ In the path of the air conditioner’s airstream
ꢁ Where it may become extremely hot or cold
ꢁ Where it may be subject to electrical or magnetic
interference
ꢁ Where there is an obstacle between the remote con-
troller and the air conditioner (since a check signal is
sent from the remote controller every 5 minutes)
7-1. Mounting on a Wall
Before mounting the remote controller, press the
ON/OFF operation button at the mounting location to
make sure that the air conditioner operates from that
location. The indoor unit should make a beeping sound
to indicate that it has received the signal.
Rear side
Remote control
holder
Press
Set in
place
Hole
To prevent loss of the remote controller,
you can connect the remote controller
to the holder by passing a string through
the remote controller and attachment hole.
Mounting screws
5/32 5/8" (4 16 mm)
(included)
To take out the remote controller, pull it forward.
Fig. 36
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8. Address Switch
Tab
8-1. Address Setting of the Remote Controller
The address can be set in order to prevent interfer-
ence between remote controllers when 2 indoor units
are installed near each other. The address is normally
set to “A.” To set a different address, it is necessary to
change the address on the second remote controller.
NOTE
Fig. 37
Once changed, you cannot restore the original
address setting of the air conditioner.
(1) Switch on the power source.
(2) Break the address-setting tab marked “A” on the
second remote controller to change the address
(Fig. 37). When the tab is removed, the address is
automatically set to B (Fig. 38).
(3) Press and hold the remote controller HIGH
POWER button and 1HR. TIMER button. Then,
press and hold the ACL (Reset) button with a
pointed object such as the tip of a pen. After 5
seconds, release the ACL button first, then
release the HIGH POWER and 1HR. TIMER but-
tons. “oP-1” (Test Run) appears, blinking in the
remote controller clock display area.
ACL button
Fig. 38
(4) Each time the 1HR. TIMER button is pressed, the
display changes as shown below. Press this but-
ton 2 times to change the display to “oP-7”
(Address setting). (Fig. 39)
Test run mode
Self-diagnostic mode
Address setting mode
ON/OFF
operation
button
HIGH POWER
button
(5) “oP-7” has now been selected for address setting.
1HR.
(6) Press the ON/OFF operation button on the remote
controller. (Fig. 39) Check that the “beep” signal-
received sound is heard from the second indoor
unit (approximately 5 times). The sound you hear
is the signal that the remote controller address
has been changed.
TIMER
button
(7) Finally press the remote controller ACL (Reset)
button to cancel the blinking “oP-7” display.
(Fig. 39)
Changing of the second remote controller address is
now completed.
ACL
(Reset)
button
Fig. 39
28
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APPENDIX C Operating Instructions
CZ-RD515U
(852-6-4181-230-00-1)
A-3
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Operating Instructions
Wired Remote Controller
CZ-RD515U
Model No.
This wired remote controller is designed for
both the “COOL/DRY/HEAT Model” and
“COOL/DRY Model” indoor unit.
Once the wired remote controller is
connected, the wireless remote controller
cannot be used.
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181230001
CV6233187877
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FEATURES
• Microprocessor Controlled Operation
The interior compartment of the remote controller contains several
features to facilitate automatic operation, easy logically displayed
for easy use.
• Air Sweep Control
This function moves a flap up and down in the air outlet, directing
air in a sweeping motion around the room and providing comfort in
every corner.
• 24-Hour ON or OFF Timer
This timer can be set to automatically turn the unit on or off at any
time within a 24 hour period.
• Automatic Restart Function for Power Failure
Even when power failure occurs, preset programmed operation
can be reactivated once power resumes.
• Automatic Switching between Cooling and Heating
This unit automatically switches between cooling operation and
heating operation according to the difference between the room
temperature and the temperature setting.
(This function is available only for “Single use” of COOL/DRY/
HEAT Model.)
• 1-Hour OFF Timer
This timer can be set to automatically turn off the unit at any time
after one hour.
• Night Setback
This function saves energy by controlling operation to provide a
quieter operating sound than normal.
• Hot Start Heating System
Right from the start, the air is warm and comfortable. This system
prevents any cold blasts at the beginning while the heat pump is
warming up, or even defrosting.
• Automatic and 3-step Fan Speed
Auto/High/Medium/Low
(This function is available only for COOL/DRY/HEAT Model.)
NOTE
• Since the wired remote controller is designed to be commonly used for various air conditioners, some of the functions of the wireless
remote controller supplied with the indoor unit cannot be used.
• “Single use” means that only one indoor unit is connected with one outdoor unit in a one-unit-to-one-unit configuration.
• “Multiple use” (i.e. Flexi-Multi system) means that two or more indoor units are connected with one outdoor unit in a multiple-unit-to-one-unit
configuration.
CONTENTS
Page
FEATURES......................................................................................................................................... 2
PRODUCT INFORMATION ................................................................................................................ 2
SAFETY PRECAUTIONS................................................................................................................... 2
INSTALLATION LOCATION ................................................................................................................ 3
ELECTRICAL REQUIREMENTS........................................................................................................3
SAFETY INSTRUCTIONS.................................................................................................................. 3
REMOTE CONTROLLER................................................................................................................... 4
OPERATION WITH THE REMOTE CONTROLLER........................................................................... 7
1. Automatic Operation (only for COOL/DRY/HEAT Model) .................................................... 7
2. Manual Operation................................................................................................................ 7
3. Adjusting the Fan Speed .....................................................................................................8
4. Fan Only.............................................................................................................................. 8
5. Night Setback Mode ............................................................................................................ 8
SPECIAL REMARKS.......................................................................................................................... 8
SETTING THE TIMER........................................................................................................................ 9
USING THE 1-HOUR OFF TIMER...................................................................................................10
ADJUSTING THE AIRFLOW DIRECTION .......................................................................................10
PRODUCT INFORMATION
SAFETY PRECAUTIONS
If you have problems or questions concerning your wired
remote controller, you will need the following information.
The following symbols used in this manual, alert you
to potentially dangerous conditions to users, service
personnel or the appliance:
Model No. __________________________________
Date of purchase _____________________________
Dealer’s address _____________________________
Phone number _______________________________
This symbol refers to a hazard or unsafe
practice which can result in severe
personal injury or death.
This symbol refers to a hazard or unsafe
practice which can result in personal
CAUTION
injury or product or property damage.
2
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INSTALLATION LOCATION
• To prevent possible hazards from insulation failure,
the unit must be grounded.
We recommend that this wired remote controller be
installed properly by qualified installation technicians
in accordance with the Installation Instructions
provided with the unit.
• Do not clean inside the indoor and outdoor units by users.
Engage authorized dealer or specialist for cleaning.
• In case of malfunction of this appliance, do not repair by
yourself. Contact to the sales dealer or service dealer for a
repair.
• Refrigerant gas leakage may cause fire.
• Do not install this wired remote
controller where there are fumes or
flammable gases, or in an extremely
humid space such as a greenhouse.
• Do not install the wired remote
controller where excessively high
heat-generating objects are placed.
• For safety, be sure to turn the air conditioner off and
also to disconnect the power before cleaning.
• Pull off the power plug from a receptacle, or switch off the
breaker, or switch off the power disconnecting mean to
isolate the air conditioner from the main power supply in
case of emergency.
Avoid:
To protect the air conditioner from heavy corrosion, avoid installing
the outdoor unit where salty sea water can splash directly onto it or
in sulphurous air near a spa.
CAUTION
• Do not turn the air conditioner on and off from the power
mains switch. Use the ON/OFF operation button.
• Do not stick anything into the air outlet of the outdoor unit.
This is dangerous because the fan is rotating at high
speed.
• Do not touch the air inlet or the sharp aluminum fins
of the outdoor unit. You may get injured.
• Keep the fire alarm and the air outlet at least 1.5m away from
the unit.
ELECTRICAL REQUIREMENTS
1. All wiring must conform to the local electrical codes.
Consult your dealer or a qualified electrician for details.
2. Each unit must be properly grounded with a ground (or
earth) wire or through the supply wiring.
3. Wiring must be done by a qualified electrician.
• Do not let children play with the air conditioner.
• Do not cool or heat the room too much if babies or invalids
are present.
NOTE
• Do not sit or step on the unit. You may fall down
accidentally.
• Do not stick any object into the FAN CASE.
You may be injured and the unit may be damaged.
Pull off the power plug from a receptacle, or switch off the breaker, or
switch off the power disconnecting mean to isolate the air conditioner
from the main power supply when not in use for a long time.
SAFETY INSTRUCTIONS
• Read this Instruction Manual carefully before using
this air conditioner. If you still have any difficulties
or problems, consult your dealer for help.
• This air conditioner is designed to give you
comfortable room conditions. Use this only for its
intended purpose as described in this Instruction
Manual.
NOTICE
• This device complies with part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
• This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules.
These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that
interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Confirm to authorized dealer or specialist on usage of
specified refrigerant type.
Using of refrigerant other than the specified type may cause
product damage, burst and injury etc.
• Never touch the unit with wet hands.
• Never use or store gasoline or other flammable vapor or
liquid near the air conditioner — it is very dangerous.
• Do not use this appliance in a potentially explosive
atmosphere.
• This air conditioner has no ventilator for intaking fresh air
from outdoors. You must open doors or windows frequently
when you use gas or oil heating appliances in the same
room, which consume a lot of oxygen from the air.
Otherwise there is a risk of suffocation in an extreme case.
• Do not swallow the battery.
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
• After removing the battery from remote controller, keep it
away from the reach of children. The battery can cause
death by suffocation if swallowed.
• FCC Caution: To assure continued compliance, follow the
attached installation instructions. Any changes or modifications
not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
3
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REMOTE CONTROLLER
NOTE
The descriptions on the AUTO ( ) or HEAT ( ) operation mode are only for the “COOL/DRY/HEAT Model,” and not for the
“COOL/DRY Model.”
Display
Information on the operating conditions is displayed while the remote
controller is switched on. If the unit is turned off, only the mode that was set
previously is still displayed.
Temperature setting buttons (TEMP.)
Press the
button to increase the set temperature.
Press the
button to reduce the set temperature.
The temperature setting changes by 2 °F each time one of the TEMP. buttons
is pressed.
FAN SPEED selector button
: The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed
NIGHT SETBACK button
For details, see “5. Night Setback Mode”. When you press this button in the
HEAT, DRY or COOL mode, the
mark appears in the display, and the
remote controller will automatically adjust the set temperature to save energy.
FLAP button
Press this button either to select the setting of the airflow direction to one of
the six possible positions manually or to select the sweep function which
moves the flap up and down automatically.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.
NOTE
When you press the FLAP button, the air flow direction will be changed one by
one as follows.
SWEEP
ACL button (ALL CLEAR)
Timer and Present Time setting buttons
First, press the SET button to select the mode (ON, OFF and Present Time
settings) you want.
Each time you press the ‘‘HH’’ button, the hours advance by one.
(PM0, PM1.....PM11, AM0, AM1.....AM11)
When you press the ACL button while the
operation button is ON, all settings are cleared.
Press the ACL button if the air conditioner is not
operating correctly.
Each time you press the ‘‘MM’’ button, the minutes advance by one when
setting Present Time and by ten when setting ON and OFF Time.
SET button
For details, see “SETTING THE TIMER”.
Press this button to select the mode you want to program.
4
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ON/OFF operation button
This button is for turning the air conditioner on and off.
MODE selector button
Use this button to select AUTO, HEAT, DRY, COOL or FAN mode.
(AUTO)
: When this setting is selected, the air conditioner calculates the difference between the
thermostat setting and the room temperature and automatically switches to the ‘‘COOL’’ or
‘‘HEAT’’ mode as appropriate. (This function is available only for “Single use” of COOL/DRY/
HEAT Model.)
(HEAT)
(DRY)
(COOL)
(FAN)
: The air conditioner makes the room warmer.
: The air conditioner reduces the humidity in the room.
: The air conditioner makes the room cooler.
: The air conditioner works only as a circulation fan except for “Multiple use” of COOL/DRY/
HEAT Model.
1 HR. TIMER button (1-HOUR OFF TIMER)
: When you press this button, regardless of whether the unit is operating or stopping, the unit operates for
one hour and then shuts down.
TIMER SELECT button
No display :The timer does not operate.
:
:
The air conditioner starts at the set time.
The air conditioner stops at the set time.
:
The air conditioner stops and starts, or starts and stops, at the set times every day.
Sensor
A temperature sensor inside the remote controller senses the room temperature.
SENSOR button
When you press this button (use a small-tipped object such as a ballpoint pen), the
mark will disappear at the
display. And the room temperature is detected by the sensor which is built into the remote controller and the air
conditioner is controlled accordingly.
NOTE
If the remote controller is located near a heat source, such as a space heater or in direct sunlight, press the
SENSOR button to switch to the sensor on the indoor unit.
NOTE
The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.
5
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REMOTE CONTROLLER (DISPLAY)
Displayed when indoor unit sensor
is in use
Displayed when operating NIGHT
SETBACK mode
Displayed when setting
temperature
Displayed when temperature is
shown
Displayed when setting timer
Symbols
(3) Temperature setting
(1) Operation mode
60 – 86 °F..............................
AUTO .....................................
(only for COOL/DRY/HEAT
Model)
HEAT......................................
(only for COOL/DRY/HEAT
Model)
When set to 80 °F
temperature indication ...........
(4) Timer
24-hour clock with ON/OFF
program Timer .......................
MILD DRY ..............................
COOL.....................................
FAN ........................................
ON Timer. ..............................
OFF Timer. ............................
1-hour OFF Timer..................
(5) NIGHT SETBACK..................
(2) Fan speed
Automatic operation ...............
HIGH .....................................
MEDIUM.................................
LOW.......................................
(6) Flap angle indication..............
Sweep indication....................
6
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OPERATION WITH THE REMOTE CONTROLLER
1. Automatic Operation
2. Manual Operation
(only for COOL/DRY/HEAT Model)
• Single use
This unit automatically switches between cooling operation and
heating operation according to the difference between the room
temperature and the temperature setting.
• Multiple use
The air conditioner calculates the difference between the
thermostat setting and room temperature, and automatically
determines the mode to operate under cooling or heating. Then,
the air conditioner continuously operates under the mode selected
at initial operation.
STEP 2
STEP 3
STEP 1
STEP 4
STEP 5
Check that the circuit breaker on the power panel is
turned on.
NOTE
STEP 2
STEP 1
If the automatic operation settings of the unit do not
meet your needs, press the setting buttons as
described below and change the settings as desired.
STEP 1
Press the MODE selector button
and select the desired mode.
For heating operation
Check that the circuit breaker on the power panel is
turned on.
o
o
o
o
NOTE
For dehumidifying operation
For cooling operation
For fan only operation
(No Fan mode in “Multiple use” of
COOL/DRY/HEAT Model)
Once
mode is selected and the unit is preset by
following the steps below, you can have the air
conditioner automatically bring the room to the desired
temperature simply by pressing the ON/OFF operation
button.
STEP 2
STEP 3
To start the air conditioner, press the ON/
OFF operation button.
Press the TEMP. setting buttons to change
the temperature setting to the desired
temperature.
STEP 1
STEP 2
Press the MODE selector button to
Press the ON/OFF operation button.
.
Adjustable temperature range:
86 °F max.
60 °F min.
To stop the air conditioner, press the ON/OFF operation
button again.
STEP 4
STEP 5
Set the FAN SPEED selector button to the
setting you want.
Press the FLAP button and set the airflow
direction as desired.
(Refer to “ADJUSTING THE AIRFLOW
DIRECTION” on page 10.)
To change the temperature setting; press the
temperature setting buttons and change the setting to
the desired temperature.
NOTE
To stop the air conditioner, press the ON/OFF
operation button again.
• Choose the best position in the room for the remote
controller, which also acts as the sensor for room
comfort and transmits the operating instructions.
Once you’ve found this best position, always keep the
remote controller there.
NOTE
• This appliance has a built-in 5-minute time delay
circuit to ensure reliable operation. When the
operation button is pressed, the compressor will start
running within three minutes. In the event of power
failure, the unit will stop.
• The display on the remote controller shows the setting
temperature and not the room temperature.
• When multiple indoor units are used and units in other
rooms are already operating, they will be operating
with the same mode as the operating indoor units.
(only for “Multiple use” of COOL/DRY/HEAT Model)
7
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A. In Cooling and DRY Mode: ( and
)
3. Adjusting the Fan Speed
A. Automatic fan speed
Simply set the FAN SPEED selector button to the
position.
This automatically sets the best fan speed for the room
temperature.
B. Manual fan speed
When the night setback mode is selected, the air conditioner
automatically raises the temperature setting 2 °F when 30 minutes
have passed after the selection was made, and then another 2 °F
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.
If you want to adjust fan speed manually during operation,
just set the FAN SPEED selector button as desired. [
, or
,
]
2 °F
4. Fan Only
Setting
temperature
2 °F
30 min.
30 min.
STEP 2
STEP 1
Press the NIGHT
SETBACK button
Time
STEP 3
B. In Heating Mode: (
)
(only for COOL/DRY/HEAT Model)
When the night setback mode is selected, the air conditioner
automatically lowers the temperature setting 4 °F when 30
minutes have passed after the selection was made, and then
another 4 °F after another 30 minutes have passed, regardless of
the indoor temperature when night setback was selected. This
enables you to save energy without sacrificing comfort. This
function is convenient when gentle heating is needed.
If you want to circulate air without any temperature
control, follow these steps:
STEP 1
Press the MODE selector button to switch to
the fan mode
Setting
temperature
4 °F
.
4 °F
STEP 2
STEP 3
Press the ON/OFF operation button.
Press the FAN SPEED selector button to
select the fan speed of your choice (
or ).
,
30 min.
30 min.
Time
Press the NIGHT
SETBACK button
There is no FAN only function in “Multiple use” of
COOL/DRY/HEAT Model.
NOTE
5. Night Setback Mode
SPECIAL REMARKS
Power failure during operation
In the event of power failure, the unit will stop. When the power is
resumed within 8 hours, the unit will restart automatically in
approximately five minutes, or 15 minutes in “Multiple use” of COOL/
DRY/HEAT Model on AUTO mode by the remote controller.
Remote Controller
The remote controller sends the setting condition to the air
conditioner regularly at five minute intervals.
Remote Controller Display
If the display malfunctions, press the ACL button.
This resets the remote controller back to the initial settings.
Make the settings again.
Night Setback Mode is used for saving energy.
Press the NIGHT SETBACK button while unit is operating.
The
mark appears in the display.
To release the night setback function, press the NIGHT SETBACK
button again.
8
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3. How to set the ON time
(Example) To start operation at 7:10 am.
SETTING THE TIMER
ON TIME
Present time
Indication
Operation
1. Press the SET button once.
The timer
indication alone
flashes and the previous set-
time is only displayed.
2. • Press the HH button until
AM 7 is displayed.
The display will change
automatically back to show the
present time after about 10 sec.
1. How to set the present time
(Example) To set to 9:10 pm.
• Press the MM button until
10 is displayed.
3. Press the TIMER SELECT
The present time and
displayed.
are
button once to set ON time.
To cancel the setting, press the TIMER SELECT button three times.
4. How to set daily ON/OFF repeat timer
Operation
Indication
(Example) To start operation at 7:10 am. and stop the air conditioner
at 11:30 pm.
1. Press the SET button three
The time indication alone
flashes.
times.
2. • Press the HH button until
PM 9 is displayed.
The display will flash for 10 sec.
and automatically stop flashing
except for the “ : ” symbol.
• Press the MM button until
10 is displayed.
2. How to set the OFF time
(Example) To stop the air conditioner at 11:30 pm.
Present time
ON TIME
OFF TIME
Programmed
daily ON / OFF
OFF TIME
Present time
9:10 pm.
Present time
7:10 am.
ON
11:30pm.
OFF
Operation
Indication
1. Press the SET button twice.
The timer
indication alone
flashes and the previous set-
time is only displayed.
2. • Press the HH button until
PM 11 is displayed.
The display will change
automatically back to show the
present time after about 10 sec.
Operation
Indication
Set the timer ON/OFF times as The present time PM 9:10 and
shown in 2 and 3.
• Press the MM button until
30 is displayed.
are displayed.
3. Press the TIMER SELECT
The present time and
button twice to set OFF time. displayed.
are
To cancel the setting, press the TIMER SELECT button once.
NOTE
To cancel the setting, press the TIMER SELECT button twice.
You can check the timer ON/OFF times after you have set them by
pressing the SET button.
5. Backup function
Even if the main power supply to the unit is turned off, the remote
controller will store the previous settings in its internal memory for up
to 8 hours. If the power is not turned back on within 8 hours, the
previous settings will be lost. In this case, the mode settings must be
reset by the user.
9
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USING THE 1-HOUR OFF
TIMER
ADJUSTING THE AIRFLOW
DIRECTION
The vertical airflow can be adjusted by moving the flap with the
remote controller. Do not move the flap with your hands. Confirm that
the remote controller has been turned on. Use the FLAP button to
set either the sweep function or one of the six airflow direction
settings.
1. 1-Hour OFF Timer
This function causes the unit to operate for one hour and then
stop, regardless of whether the unit is on or off when this
button is pressed.
A. Sweep function
The flap starts moving
up and down to deliver
air over the sweep
range.
The
indicator in the display indicates that this function is
operating.
Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1
HR. TIMER button.
B. Setting the airflow manually
appears in the display.
SWEEP
Referring to the above
Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the
unit to stop operating, and then press the ON/OFF operation button
again.
The 1-Hour Timer function is now cancelled and the unit operates
normally.
illustration, use the
FLAP button to set the
airflow direction within
the range used during
the heating, cooling, or
dehumidifying
COOL
DRY
FAN
SWEEP
HEAT
operation.
NOTE
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER
button is pressed once to cancel the function and then again, the
unit continues to operate for one hour from that point in time and
then stops.
• It is not possible to use the OFF Timer and 1-Hour OFF Timer
together. Whichever function is set last takes precedence. If the 1
HR. TIMER button is pressed while the TIMER OFF function
operates, the OFF Timer is cancelled and the unit will stop
operating one hour later.
NOTE
• The flap automatically closes when the unit is off.
• During the heating operation, the fan speed will be very low and the
flap will be in the horizontal position (position ) until the air being
blown out of the unit begins to warm. Once the air warms up, the
flap position and fan speed change to the settings specified with
the remote controller.
CAUTION
2. Operation together with the daily ON/OFF
repeat timer
• Use the FLAP button on the remote controller to adjust the
position of the flap. If you move the flap by hand, the flap
position according to the remote controller and the actual
flap position may no longer match. If this should happen,
shut off the unit, wait for the flap to close, and then turn on
the unit again; the flap position will now be normal again.
• Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip
down.
The 1-Hour OFF Timer setting is given priority over the DAILY ON/
OFF REPEAT setting.
10
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APPENDIX D INSTALLATION INSTRUCTIONS
CZ-RD515U
(852-6-4190-592-00-0)
A-4
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INSTALLATION INSTRUCTIONS
Wired Remote Controller
‡ In order to install this wired remote controller onto a wall-mounted model, the connection kit
IMPORTANT
(CZ-RC515U or CZ-RC515UA), which must be purchased separately, is required.
‡ Once the wired remote controller is connected, the wireless remote controller cannot be used.
Table 1
Parts supplied with the remote controller
See Table 1.
Parts
Figure
Q'ty
Parts
Figure
Q'ty
26.2 ft. (8m)
Wired
remote
controller
Wire
harness
Remote controller installation guidelines
1
1
Installation location
‡ Mount the remote controller 3.3 to 4.9 ft. (1 to 1.5
meters) off the floor where it can sense the average
temperature of the room.
5/32 15/16"
(4 25mm)
Machine
screws
Instruction
manual
2
2
2
1
1
‡ Do not mount the remote controller in a place
exposed to direct sunlight or where it is exposed to
outside air such as near a window.
5/32 15/16"
(4 25mm)
Tapping
screws
Installation
Instructions
‡ Do not mount the remote controller behind a curtain or
other object so that it is separated from the air circula-
tion of the room.
‡ Mount the remote controller inside the room being air
Spacers
conditioned.
Switching the room temperature sensor
Room temperature sensors are separately incorporated in both the indoor unit and the remote controller. Either sensor can
be used to sense the room temperature. The indoor unit sensor is usually used.
If you wish the remote controller to sense the room temperature, press the SENSOR button with a ballpoint pen or tool with
a small tip. (Refer to Fig. 9 on page 4 to locate the SENSOR button.)
How to install the remote controller
IMPORTANT
‡ The remote controller is set to “Cool/Dry/Heat model” at
the time of shipment from the factory. If the purchased air
conditioner is a COOL/DRY model, follow the instructions
on the label and change the switch on the reverse side of
the remote controller unit to “Cool/Dry model”. (Fig. 1)
‡ The remote controller is also set to “Single” at the time of
shipment from the factory. For multiple use, set the
switch on the reverse side of the remote controller unit to
“Multi”. (Fig. 1)
‡ After all work is completed, if any switches have been
changed, then be sure to press the ACL (Reset) button.
(Refer to Fig. 9 on page 4 to locate the ACL (Reset) but-
ton.)
Fig. 1
CV6233187884
85264190592000 2011
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A. Installing with in-wall junction box
In-wall junction box (locally purchased)
(1) Install the junction box (locally purchased) into the wall.
(Figs. 2-a and 3)
(2) Pass the wire harness through the junction box and
conduit. (Fig. 3)
Tab
(3) Insert a flathead screwdriver into the 5 tab locations
and disconnect the back plate of the remote controller by
lifting up slightly. (Fig. 2-b)
2-3/8"
(60mm)
Back
plate
The tabs are thin; take care not to chip them.
Fig. 2-a
Fig. 2-b
(4) Pass the wire harness connector through the cord open-
ing on the back plate of the remote controller.
from the indoor unit
Use nippers or a similar tool to cut out the slots for the
remote controller back plate screws. Insert the spacers
and use the machine screws to install the remote con-
troller back plate. (Fig. 3)
In-wall junction box
(5) Insert the connector into the PCB of the remote controller
unit, and wrap the wire harness around the hook. (Fig. 4)
Opening
Wire harness
(6) Store the excess wire harness inside the junction box,
then hook the remote controller unit onto the top of the
back plate and install the remote controller unit.
(7) To remove the remote controller unit after it has been
installed, insert a flathead screwdriver into the slot on the
bottom of the case and turn it. (Fig. 5)
Wall
Spacers
Back plate
Machine
screws
B. Installing directly onto the wall
Remote
controller
(1) Insert a flathead screwdriver into the 5 tab locations and
disconnect the back plate of the remote controller by lift-
ing up slightly. (Fig. 2-b)
Fig. 3
The tabs are thin; take care not to chip them.
PCB
(2) Use tapping screws to directly fasten the remote con-
troller back plate onto the wall. (Fig. 6)
(3) Insert the connector into the PCB of the remote controller
unit, and wrap the wire harness around the hook. (Fig. 4)
Hook
Slot
(4) Use nippers or a similar tool to cut out the slot on the top
of the remote controller unit. Pass the wire harness
through the slot, then hook the remote controller unit
onto the top of the back plate and install the remote con-
troller unit.
Connector
Fig. 4
Fig. 5
(5) In order to conceal the exposed wiring, use a wire cover
(locally purchased) or similar means.
NOTE
Wire harness
Cut out
‡ When installing the remote controller back plate, be sure
that it is flat and straight. Do not over-tighten the installa-
tion screws.
‡ Install the remote controller away from all sources of elec-
Wall
trical noise.
Back plate
‡ Install a noise filter or take other appropriate action if elec-
Tapping
screws
trical noise affects the power supply circuit of the unit.
Remote
controller
Fig. 6
2
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7P IND and 4P RC
wiring connector
5P FLAP
wiring connector
How to wire the remote controller
Ceiling
panel
(1) Turn OFF the power and remove the ceiling panel
air-intake grille. (Refer to 3-6-1 Before Installing the
Ceiling Panel in the Installation Instructions supplied
with the indoor unit.)
(2) Remove the 3 power box cover screws and 2 control
box cover screws, then remove both covers. At this
time, take care not to drop the covers. (Fig. 7)
Control
box
cover
(3) Disconnect the 7P (IND) terminal and 4P (RC) termi-
nal of the 7P IND and 4P RC wiring connectors and
the 5P terminal of the 5P FLAP wiring connector
from the control box PCB connectors (IND, RC,
FLAP). Disconnect each wiring connector from the
clamp that fastens it. (Fig. 7)
Power box cover
Indicator
(4) Remove the ceiling panel. (To remove the ceiling
panel, follow the steps for 3-6 How to Install the
Ceiling Panel in the reverse order. Refer to the
Installation Instructions supplied with the indoor unit.)
Fig. 7
Fig. 8-a
Indicator
7P IND and 4P RC
wiring connector
5P FLAP
7P IND and 4P RC
wiring connector wiring connector
Ceiling
panel
Clamps
Wire harness
Remote
controller
4P
7P
5P FLAP
wiring
connector
Control PCB
Putty
Terminal cover
Wire harness
Indicator
Wire harness
Clamping strap
Fig. 8-b
Fig. 8
(5) Remove the terminal cover screws, then remove the cover. At this time, take care not to drop the cover. (Fig. 8)
(6) Pull in the wire harness from the remote controller as shown in Fig. 8-b.
‡ Remove the putty before wiring. After wiring, make sure to restore the putty.
(7) Insert the wire harness 4P terminal into the control box PCB connector (RC). (Fig. 8-a)
(8) Install the terminal cover. Then install the ceiling panel. (Refer to 3-6 How to Install the Ceiling Panel in the
Installation Instructions supplied with the indoor unit.)
(9) Insert only the 7P (IND) terminal of the 7P IND and 4P RC wiring connector into the connector (IND) on the control
box PCB. Store the 4P terminal inside the control box. (Fig. 8-a)
(10) Next, insert the 5P terminal of the 5P FLAP wiring connector into the connector (FLAP) on the control box PCB.
(Fig. 8-a)
(11) When the connections are completed, fasten the wire harness and each wiring connector with the clamps.
(12) Install the power box cover and control box cover.
(13) Install the air-intake grille. (Refer to 3-6 How to Install the Ceiling Panel in the Installation Instructions supplied
with the indoor unit.)
3
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How to Test Run the Air Conditioner
After turning on the power of the air conditioner, use the
remote controller and follow the steps below to conduct
the test run.
(1) Set the remote controller in Test Run mode. (Fig. 9)
a)Press and hold the NIGHT SETBACK button and
the 1HR. TIMER button.
ON/OFF
operation button
b)Then press and hold the ACL (Reset) button with
a pointed object such as the tip of a pen. After 5
seconds, release the ACL button first.
NIGHT SETBACK
button
1 HR.TIMER
button
c)Then release the NIGHT SETBACK and 1HR.
TIMER buttons.
d)
appears and “oP-1” blinking in the remote
controller clock display area. (Fig. 10)
(2) Start Cooling mode test run by pressing the ON/OFF
operation button of the remote controller. (Fig. 9)
ACL (Reset)
button
SENSOR button
‡ This starts the fan producing uncooled forced air
with the 3 indicator lamps (OPERATION lamp,
TIMER lamp, and HIGH POWER lamp) on the
main unit blinking. (Fig. 11)
Fig. 9
‡ After 3 minutes, the system shifts into cooling
operation, and cool air will start to be felt. Cooling
mode test run is unaffected by the room tempera-
ture.
(3) Press the ON/OFF operation button of the remote
controller again to stop the test run. (Fig. 9)
Fig. 10
(4) Finally press the ACL (Reset) button of the remote
controller to release it from Test Run mode to return
to normal mode. (Fig. 9)
‡ “ ” and “oP-1” will disappear from the remote
controller clock display area.
NOTE
Troubleshooting:
In the event that the green OPERATION lamp is blink-
ing upon powering up the system, an error condition
exists. In this case, refer to the self-diagnostics proce-
dure which can be seen by opening the air-intake grille.
OPERATION button
OPERATION lamp
TIMER lamp
HIGH POWER lamp
IMPORTANT
REMOTE CONTROL receiver
Fig. 11
After the test run is completed, be sure to press the
ACL (Reset) button to return to normal mode. The air
conditioner will not operate correctly if this is not done.
WI1011-0
Printed in China
4
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DC1111-0
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