TECHNICAL & SERVICE MANUAL
INDOOR UNIT : CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
DC INVERTER MULTI-SYSTEM AIR CONDITIONER
Capacity
Indoor Model No.
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
Product Code No.
1 852 360 94
1 852 360 95
1 852 360 96
1 852 360 97
1 852 360 98
7,500BTU / h
9,000BTU / h
11,900BTU / h
17,500BTU / h
24,200BTU / h
Wall Mounted Type Indoor Unit
< Applicable Multi-Outdoor Units >
CU-3KS19NBU (3-room multi unit)
CU-4KS24NBU (4-room multi unit)
CU-4KS31NBU (4-room multi unit)
N
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
N
CS-MKS18NKU
CS-MKS24NKU
REFERENCE NO. SM700873
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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
.............................................................................................................
SAFETY PRECAUTIONS
2
4
5
6
....................................................................................................................
....................................................................................
TABLE OF CONTENTS
APPLICABLE MULTI-OUTDOOR UNITS
...................................................................................................................
1. OPERATING RANGE
2. SPECIFICATIONS
.............................................................................................................
2-1. Unit Specifications
7
17
22
.......................................................................................
.......................................................................................
2-2. Major Component Specifications
2-3. Other Component Specifications
....................................................................................................................
3. DIMENSIONAL DATA
23
25
26
31
4. REFRIGERANT FLOW DIAGRAM
..................................................................................................
.................................................................................................
....................................................................................................
4-1. Refrigerant Flow Diagram
5. PERFORMANCE DATA
5-1. Air Throw Distance Charts
6. ELECTRICAL DATA
6-1. Electric Wiring Diagrams
7. FUNCTIONS
...........................................................................................................
...........................................................................................................
7-1. Operation Functions
7-2. Protective Functions
32
34
8.TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
..........................................................
8-1. Precautions before Performing Inspection or Repair
35
35
38
41
42
.................................................................................................
8-2. Method of Self-Diagnostics
..............................................................................
..........................................................................................
8-3. Checking the Indoor and Outdoor Units
8-4. Trouble Diagnosis of Fan Motor
.........................................................
8-5. Noise Malfunction and Electromagnetic Interference
..........................................................................................
..........................................................................................
..........................................................................
APPENDIX A Operating Instructions
APPENDIX B Operating Instructions
A-1
A-2
A-3
APPENDIX C INSTALLATION INSTRUCTIONS
4
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APPLICABLE MULTI-OUTDOOR UNITS
Multi-Outdoor Unit
3-Room
4-Room
4-Room
CU-3KS19NBU CU-4KS24NBU CU-4KS31NBU
Indoor Unit
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
YES
YES
YES
YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
5
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1. OPERATING RANGE
Combination with cooling outdoor unit CU-3KS19NBU, CU-4KS24NBU or CU-4KS31NBU
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
14 °F DB
6
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2. SPECIFICATIONS
2-1. Unit Specifications
Indoor Unit
CS-MKS7NKU
< 230V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
7,500
2.20
241 (410) / 224 (381) / 212 (360)
2.77
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.11
V
A
W
25
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
33 / 30 / 27 / 23
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
7
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Indoor Unit
CS-MKS7NKU
< 208V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
7,500
2.20
241 (410) / 224 (381) / 212 (360)
2.77
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.12
V
A
W
25
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
33 / 30 / 27 / 23
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
8
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Indoor Unit
CS-MKS9NKU
< 230V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
9,000
2.65
ft3/min (m3/h)
Air Circulation (Hi/Me/Lo)
259 (440) / 241 (410) / 212 (360)
Moisture Removal (High)
Pints/h
3.4
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.15
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
34 / 31 / 28 / 23
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
9
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Indoor Unit
CS-MKS9NKU
< 208V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
9,000
2.65
ft3/min (m3/h)
Air Circulation (Hi/Me/Lo)
259 (440) / 241 (410) / 212 (360)
Moisture Removal (High)
Pints/h
3.4
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.17
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
34 / 31 / 28 / 23
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
10
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Indoor Unit
CS-MKS12NKU
< 230V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
11,900
3.50
282 (479) / 259 (440) / 218 (370)
4.26
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.15
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
36 / 33 / 29 / 25
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
11
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Indoor Unit
CS-MKS12NKU
< 208V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
11,900
3.50
282 (479) / 259 (440) / 218 (370)
4.26
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.17
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
36 / 33 / 29 / 25
Flare Type
1/4 (6.35)
3/8 (9.52)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-7/32 (285)
32-15/32 (825)
7-7/16 (189)
10-19/32 (269)
35-21/32 (906)
14-1/32 (356)
19.8 (9.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
24.3 (11.0)
2.82 (0.08)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
12
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Indoor Unit
CS-MKS18NKU
< 230V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
17,500
5.15
500 (850) / 447 (760) / 377 (641)
4.89
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.15
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
41 / 38 / 34 / 28
Flare Type
1/4 (6.35)
1/2 (12.7)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-5/8 (219)
11-27/32 (301)
45-1/8 (1,146)
15-5/32 (385)
26.5 (12.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
33.1 (15.0)
4.59 (0.13)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
13
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Indoor Unit
CS-MKS18NKU
< 208V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
17,500
5.15
500 (850) / 447 (760) / 377 (641)
4.89
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.17
V
A
W
35
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
41 / 38 / 34 / 28
Flare Type
1/4 (6.35)
1/2 (12.7)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-5/8 (219)
11-27/32 (301)
45-1/8 (1,146)
15-5/32 (385)
26.5 (12.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
33.1 (15.0)
4.59 (0.13)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
14
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Indoor Unit
CS-MKS24NKU
< 230V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
24,200
7.10
541 (919) / 500 (850) / 435 (739)
4.89
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.20
V
A
W
45
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
44 / 41 / 38 / 30
Flare Type
1/4 (6.35)
5/8 (15.88)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-5/8 (219)
11-27/32 (301)
45-1/8 (1,146)
15-5/32 (385)
26.5 (12.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
33.1 (15.0)
4.59 (0.13)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
15
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Indoor Unit
CS-MKS24NKU
< 208V >
Type
Wall Mounted Type Indoor Unit
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
Capacity
BTU/h
kW
ft3/min (m3/h)
24,200
7.10
541 (919) / 500 (850) / 435 (739)
4.89
Air Circulation (Hi/Me/Lo)
Moisture Removal (High)
Pints/h
Electrical Rating
Available Voltage Range
Running Amperes
Power Input
Cooling
187 to 253
0.22
V
A
W
45
Features
Control / Temperature Control
Control Unit
Microprocessor / I.C. Thermistor
Wireless Remote Control Unit
Timer
24-Hour ON or OFF Timer, 1-Hour OFF Timer
Fan Speeds
Indoor
Horizontal
Vertical
Auto and 3 steps
Manual
Airflow Direction (Indoor)
Auto
Air Filter
Refrigerant
Washable, Anti-Mold
R410A
Operation Sound
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Indoor : Hi/Me/Lo/Qt*
dB-A
44 / 41 / 38 / 30
Flare Type
1/4 (6.35)
5/8 (15.88)
Optional
Refrigerant
Narrow tube
inch (mm)
Tube Diameter
Refrigerant Tube Kit
Wide tube
inch (mm)
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-5/8 (219)
11-27/32 (301)
45-1/8 (1,146)
15-5/32 (385)
26.5 (12.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Ib. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
Ib. (kg)
cu.ft (m3)
33.1 (15.0)
4.59 (0.13)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
16
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2-2. Major Component Specifications
2-2-1. Indoor Unit
Indoor Unit
CS-MKS7NKU
Control PCB
Part No.
Controls
CB-CU-MKS7NKU
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Q'ty ... Dia. and Length
Cross-Flow
inch (mm)
1 ... D3-5/8 / L24-31/32 (D92 / L634)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-41CVJ-D847-4 ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
1,050
47
W
Coil Resistance
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
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
(Ambient Temp. 77 °F (25 °C))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
2.02 (0.188)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
17
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Indoor Unit
CS-MKS9NKU
Control PCB
Part No.
Controls
CB-CU-MKS9NKU
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Q'ty ... Dia. and Length
Cross-Flow
inch (mm)
1 ... D3-5/8 / L24-31/32 (D92 / L634)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-41CVJ-D847-4 ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
1,100
47
W
Coil Resistance
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
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
(Ambient Temp. 77 °F (25 °C))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
2.02 (0.188)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
18
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Indoor Unit
CS-MKS12NKU
Control PCB
Part No.
Controls
CB-CU-MKS12NKU
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Q'ty ... Dia. and Length
Cross-Flow
inch (mm)
1 ... D3-5/8 / L24-31/32 (D92 / L634)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-41CVJ-D847-4 ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
1,200
47
W
Coil Resistance
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
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
(Ambient Temp. 77 °F (25 °C))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
2.02 (0.188)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
19
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Indoor Unit
CS-MKS18NKU
Control PCB
Part No.
Controls
CB-CU-MKS18NKU
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Q'ty ... Dia. and Length
Cross-Flow
inch (mm)
1 ... D3-5/8 / L33-9/32 (D92 / L845)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-41CVJ-D847-3 ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
1,200
30
W
Coil Resistance
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
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
(Ambient Temp. 77 °F (25 °C))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
3.07 (0.285)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
20
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Indoor Unit
CS-MKS24NKU
Control PCB
Part No.
Controls
CB-CU-MKS24NKU
Microprocessor
250V 3A
Control Circuit Fuse
Fan
Type
Q'ty ... Dia. and Length
Cross-Flow
inch (mm)
1 ... D3-5/8 / L33-9/32 (D92 / L845)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-41CVJ-D847-3 ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
1,300
30
W
Coil Resistance
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
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
(Ambient Temp. 77 °F (25 °C))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
3.07 (0.285)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
21
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2-3. Other Component Specifications
Quantity of Sensor
CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKU
Model No.
Sensor Name
of sensor
PTM-D51H-
S3 TH2
1
0
1
0
1
0
0
1
0
1
Indoor air temp sensor
PTM-D51H-
S3-2 TH2
10
9
8
7
6
5
4
3
2
1
0
50
59 68 77 86 95 104
(10) (15) (20) (25) (30) (35) (40)
Temperature °F (°C)
Quantity of Sensor
CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKU
Model No.
of sensor
Sensor Name
PTM-D51H-
S3 TH1
1
0
1
0
1
0
0
1
0
1
Indoor heat exchanger sensor
PTM-D51H-
S3-2 TH1
200
180
160
140
120
100
80
60
40
20
0
32 50 68 86 104 122 140 158 176 194
(0) (10)(20) (30) (40)(50) (60) (70)(80) (90)
Temperature °F (°C)
22
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3. DIMENSIONAL DATA
Indoor Unit
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
Unit: inch(mm)
(852-0-0010-215-00-0)
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Indoor Unit
CS-MKS18NKU
CS-MKS24NKU
Unit: inch(mm)
(852-0-0010-216-00-0)
24
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4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
Indoor Unit
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
Indoor unit
Indoor unit
Indoor unit
O.D. 3/8" (9.52 mm)
Indoor heat
exchanger
O.D. 1/4" (6.35 mm)
Cooling cycle
Cooling cycle
Cooling cycle
Indoor Unit
CS-MKS18NKU
O.D. 1/2" (12.7 mm)
Indoor heat
exchanger
O.D. 1/4" (6.35 mm)
Indoor Unit
CS-MKS24NKU
O.D. 5/8" (15.88 mm)
Indoor heat
exchanger
O.D. 1/4" (6.35 mm)
25
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5. PERFORMANCE DATA
5-1. Air Throw Distance Charts
Indoor Unit
CS-MKS7NKU
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15
0
0
5
20
25
30
5
10
15
: Flap angle 0
: Flap angle 30
°
,
°
: Axis air velocity 0°
: Axis air velocity 30°
,
26
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Indoor Unit
CS-MKS9NKU
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15
0
0
5
20
25
30
5
10
15
: Flap angle 0
: Flap angle 30
°
,
°
: Axis air velocity 0°
: Axis air velocity 30°
,
27
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Indoor Unit
CS-MKS12NKU
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15
0
0
5
20
25
30
5
10
15
: Flap angle 0
: Flap angle 30
°
,
°
: Axis air velocity 0°
: Axis air velocity 30°
,
28
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Indoor Unit
CS-MKS18NKU
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15
0
0
5
20
25
30
5
10
15
: Flap angle 0
: Flap angle 30
°
,
°
: Axis air velocity 0°
: Axis air velocity 30°
,
29
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Indoor Unit
CS-MKS24NKU
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15
0
0
5
20
25
30
5
10
15
: Flap angle 0
: Flap angle 30
°
,
°
: Axis air velocity 0°
: Axis air velocity 30°
,
30
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6. ELECTRICAL DATA
6-1. Electric Wiring Diagrams
Indoor Unit
CS-MKS7NKU CS-MKS9NKU CS-MKS12NKU CS-MKS18NKU CS-MKS24NKU
TERMINAL BASE
EVAPORATOR
BLK
1
2
3
WHT
RED
AC1 AC2 SI
1 1
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
1010
RED
CONNECTOR
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
1010
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
1 1
2 2
3 3
4 4
5 5
1 1
2 2
3 3
4 4
5 5
RED
PNK
BLU
BRN
YEL
FLAP
5P (WHT)
FLAP
LAMP
10P (WHT)
FLAP MOTOR
CONTROLLER
ROOM THERMISTOR
1 1
1 1
2 2
3 3
4 4
5 5
6 6
BLK
RED
2 2
3 3
4 4
ROOM/COIL
4P (WHT)
BLK
BLK
BLK
BLK
WHT
YEL
BLU
DCM
6P (BLU)
FM
COIL THERMISTOR
FAN MOTOR
HA
JEM-A
4P (WHT)
1 2 3 4
8FA2-5251-11000-2
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7. FUNCTIONS
7-1. Operation Functions
Emergency operation
SENSOR DRY
Emergency operation is available when the remote
controller malfunctions, has been lost, or otherwise
cannot be used.
During DRY operation, the system adjusts the room
temperature and fan speed according to the conditions in the
room, in order to maintain a comfortable room environment.
SENSOR DRY operation
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.
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(15°C), or more than 5°F(3°C) below the set
temperature.
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.
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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
temperature
Time
0
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
Orange
Green
COOL operation
TIMER lamp
Green
Green
Green
QUIET lamp
ION 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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7-2. Protective Functions
Freeze prevention
During COOL or DRY operation, freezing is detected and
operation is stopped when the temperature of the indoor heat
exchanger matches the conditions below.
1. Freeze-prevention operation is engaged when the
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.
C
46
(8)
A
B
43
(6)
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
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.
NOTE
(CLxx models only)
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.
34
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8. TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)
8-1. 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.
8-2. Method of Self-Diagnostics
Follow the procedure below to perform detailed trouble diagnostics.
< Clock display >
Test run mode
NOTE
Self-diagnostics mode
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.
QUIET
button
Step 1: Press and hold the remote controller QUIET button and 1 HR
TIMER button. At the same time, press the ACL (reset) button.
Use a pointed object such as the tip of a pen to press the ACL
button.
1HR.
TIMER
button
When this has been done, "oP-1" (test run) appears, blinking, in
the remote controller clock display area.
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.
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(1) Self-diagnostics Lamps
INDOOR UNIT
(1) OPERATION lamp
(2) TIMER lamp
(3) QUIET lamp
OPERATION button
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
QUIET
(3)
TIMER
(2)
OPERATION
(1)
CODE
S01
DIAGNOSIS CONTENTS
POSSIBLE MALFUNCTION
(1) OPEN OR SHORT CIRCUIT IN SENSOR
ROOM TEMP. SENSOR TROUBLE
(2) POOR CONTACT AT CONNECTOR OR OPEN CIRCUIT AT
TERMINAL PRESS-FIT LOCATION (FOR HUMIDITY SENSOR,
THIS REPRESENTS SHORT-CIRCUIT DETECTION ONLY.)
(3) I/D PCB FAILURE (I/D = INDOOR)
I/D HEAT EXCHANGER
S02
TEMP. SENSOR TROUBLE
HUMIDITY SENSOR TROUBLE
S03
COMPRESSOR TEMP. SENSOR
TROUBLE
S04
S05
(1) OPEN OR SHORT CIRCUIT IN SENSOR
(2) POOR CONTACT AT CONNECTOR OR OPEN CIRCUIT AT
TERMINAL PRESS-FIT LOCATION
O/D HEAT EXCHANGER
TEMP. SENSOR TROUBLE
(3) O/D PCB FAILURE (O/D = OUTDOOR)
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
(SERIAL COMMUNICATION TROUBLE)
E01
E02
(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
(1) EXTERNAL ROM DATA FAILURE (2) O/D PCB FAILURE
O/D UNIT EXTERNAL ROM TROUBLE
CURRENT PEAK CUT
E03
E04
(1) INSTANTANEOUS POWER STOPPAGE (2) HIC OR POWER TR FAILURE
(3) O/D PCB FAILURE
PAM CIRCUIT TROUBLE
(1) O/D PCB FAILURE
(2) O/D POWER VOLTAGE TROUBLE
E05
E06
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
E07
E08
(1) 4-WAY VALVE FAILURE (HEAT PUMP MODEL ONLY)
(2) O/D PCB FAILURE
4-WAY VALVE SWITCHING TROUBLE
ZERO-CROSS TROUBLE
(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
O/D SYSTEM COMM FAILURE,
OLR OPERATION, O/D POWER
OPEN PHASE, O/D FREEZING
(1) MIS-WIRING (2) BLOWN FUSE (3) POWER RELAY FAILURE
(4) O/D PCB FAILURE (5) COMPRESSOR FAILURE
(1) I/D FAN SYSTEM FAILURE (2) INSUFFICIENT GAS
(3) OPERATION AT LOW TEMPERATURE
FREEZING-PREVENTION OPERATION
E13
8FA2-5251-11100-2
36
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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.
37
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8-3. 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 4 indicator
lamps on the unit. If all 4 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 "4. How to Test Run the Air Conditioner" on Appendix B.
(2) Checking the outdoor unit
No.
Control
Check items (unit operation)
1
Apply the rated voltage between outdoor
unit terminals L1 and L2.
• The control panel LED (red) must illuminate.
2
Short-circuit the outdoor unit COM terminal
to the T-RUN terminal.
• The compressor and fan motor 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
38
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(3) How to Identify a Serial Communication Error
If the lamps on the main body show the following conditions after the completion of self-diagnosis,
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-Diagnosis" for the self-diagnosis procedure.
:
Lamp Quiet
(3)
Timer Operation
(2) (1)
Off
Blinking
Illuminated
Condition
:
:
E01
E12
(3-1) Condition: E01
For terminal board short circuit work or inter-unit wiring removal, turn off the power to
avoid an electric shock.
WARNING
Remove the terminal board short circuit after the completion of self-diagnosis.
Operate the air conditioner
in the "TEST RUN" mode.
Does the voltage
1. Short-circuit between the terminals 2 and 3
on the indoor unit terminal board.
Yes
between the terminals 1 and 2
on the indoor unit terminal board
reach the rated value ?
2. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
No
Condition: E12
What is the self-diagnosis result ?
Condition: E01
1. Disconnect the inter-unit wiring on the indoor
unit side.
2. Operate the system in the "TEST RUN" mode.
An error in the P. C. Board in the
indoor unit might be considered.
1. Disconnect the inter-unit wiring on the outdoor
unit side.
2. Short-circuit between the terminals 2 and 3
on the outdoor unit terminal board.
Does the voltage
between the wires 1 and 2 of
inter-unit wiring on the indoor unit side
reach the rated value ?
Yes
3. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
No
An error in the P. C. Board in the
indoor unit might be considered.
(Terminal board error, etc.)
An error in the P. C. Board in the
Condition: E12
What is the self-diagnosis result ?
outdoor unit might be considered.
(Connection error between the P. C. Board in
the outdoor unit and J-B)
An error in the inter-unit wiring might be considered.
(ex. wire breaking or connection error, etc.)
An error in the inter-unit wiring
might be considered.
(ex. wire breaking or connection error, etc.)
Condition: E01
An error in the P. C. Board in the
outdoor unit might be considered.
Connection error between the P. C. Board in
the outdoor unit and J-B)
39
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(3-2) Condition: E12
1. Disconnect the inter-unit wiring on the indoor
unit side.
2. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
Condition: E01
What is the self-diagnosis result ?
Condition: E12
1. Disconnect the inter-unit wiring on the outdoor
unit side.
2. Operate the system in TEST RUN mode. Then,
five minutes later, perform the self-diagnosis.
An error in the P. C. Board in the
indoor unit might be considered.
(Terminal board error, etc.)
Condition: E01
What is the self-diagnosis result ?
Condition: E12
An error in the P. C. Board in the
outdoor unit might be considered.
(Connection error between the P. C. Board in
the outdoor unit and J-B)
An error in the inter-unit wiring
might be considered.
(ex. wire breaking or connection error, etc.)
40
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8-4. Trouble Diagnosis of Fan Motor
8-4-1. 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
DC 230 V or more
DC 14 V or more
(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
Fluctuation between DC 1.7 to 6.1 V
(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.
41
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8-5. 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
(The fundamental concept is to
make the system less susceptible to noise.)
1. Locations near broadcast stations where
there are strong electromagnetic waves
Either of the following trouble may occur.
1. The unit may stop suddenly during
operation.
- Insulate for noise or
distance from the noise source. -
1. Use shielded wires.
2. Locations near amateur radio (short wave)
stations
2. Indicator lamps may flicker.
3. Locations near electronic sewing machines
and arc-welding machines
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.
42
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APPENDIX A Operating Instructions
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
(852-6-4181-214-00-2)
A-1
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Operating Instructions
Split System Air Conditioner
Model No.
Indoor Units
Outdoor Units
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
This air conditioner uses the refrigerant R410A.
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181214002
CV6233187648
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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
•
Air Sweep Control
The interior compartment of the remote controller
contains several features to facilitate automatic operation,
easy logically displayed for easy use.
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
during heating, cooling, and drying operation.
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.
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.
•
Quiet Operation
The fan rotates slower than the fan speed setting to
provide a quieter operating sound.
Automatic and 3-step Fan Speed
Auto/High/Medium/Low
CONTENTS
Page
Page
FEATURES............................................................................. 2
PRODUCT INFORMATION.................................................... 2
SAFETY PRECAUTIONS....................................................... 2
INSTALLATION LOCATION.................................................... 3
ELECTRICAL REQUIREMENTS ........................................... 3
SAFETY INSTRUCTIONS...................................................... 3
NAMES OF PARTS ................................................................ 5
USING THE REMOTE CONTROLLER ................................ 10
OPERATION WITH THE REMOTE CONTROLLER ............ 12
1. Operation .............................................................. 12
2. Adjusting the Fan Speed....................................... 13
3. Fan Only................................................................ 13
4. Night Setback Mode.............................................. 14
5. QUIET Mode ......................................................... 15
6. HIGH POWER Mode............................................. 15
SPECIAL REMARKS ........................................................... 16
SETTING THE TIMER ......................................................... 17
USING THE 1-HOUR OFF TIMER....................................... 19
TIPS FOR ENERGY SAVING .............................................. 19
ADJUSTING THE AIRFLOW DIRECTION........................... 20
OPERATION WITHOUT THE REMOTE CONTROLLER..... 21
CARE AND CLEANING ....................................................... 21
WIRED REMOTE CONTROLLER........................................ 23
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) .... 24
OPERATING RANGE........................................................... 24
SPECIFICATIONS................................................................ 25
PRODUCT INFORMATION
SAFETY PRECAUTIONS
The following symbols used in this manual, alert you
to potentially dangerous conditions to users, service
personnel or the appliance:
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.
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
CAUTION
personal injury or product or property
damage.
2
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INSTALLATION LOCATION
•
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 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.
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.
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.
Pull off the power plug from a receptacle, or switch off the breaker, or switch off
NOTE
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.
•
•
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.
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.
3
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•
•
•
To prevent possible hazards from insulation failure, the unit must
be grounded.
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 turn the air conditioner on and off from the power mains switch.
Use the ON/OFF operation button.
CAUTION
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.
Do not let children play with the air conditioner.
Do not cool or heat the room too much if babies or invalids are present.
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.
•
•
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.
NOTICE
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:
• 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.
•
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.
4
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NAMES OF PARTS
Air Intakes
INDOOR UNIT
Air Outlet
Remote Controller
Drain Hose
Refrigerant Tubes
OUTDOOR UNIT
Air Outlet
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.
NOTE
This air conditioner consists of an indoor unit and an outdoor unit. You can control
the air conditioner with the remote controller.
Air Intake Air from the room is drawn into this section and passes through air filters which
remove dust.
Air Outlet Conditioned air is blown out of the air conditioner through the air outlet.
Remote Controller The remote controller controls power ON/OFF, operation mode selection,
temperature, fan speed, timer setting, and air sweeping.
Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which
refrigerant gas flows.
Drain Hose Moisture in the room condenses and drains off through this hose.
Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and
other electrical components.
5
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UNIT DISPLAY AND OPERATION BUTTON
INDOOR UNIT
IMPORTANT
OPERATION lamp
TIMER lamp
QUIET lamp
Avoid using radio equipment
such as mobile phone near
(within 4 ft. (1.2m)) the remote
control receiver. Some radio
equipment may cause
QUIET
OPERATION button
malfunction of the unit.
If the trouble happens,
disconnect power and restart
the air conditioner after a few
minutes.
REMOTE CONTROL receiver
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.
Each time this button is pressed, the operation mode changes cyclically.
Cooling operation
Stop
OPERATION lamp This lamp lights when the system is in the continuous DRY (orange), COOL
(green) and FAN (green) mode.
TIMER lamp This lamp lights when the system is being controlled by the timer.
QUIET lamp This lamp lights during operation in the QUIET mode.
The unit’s display lamps are dimmed during operation in the NIGHT SETBACK
mode.
NOTE
6
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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
(1) Operation mode
(4) Timer
24-hour clock with ON/OFF
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. fla.dication.....................
Flap angle indication ..............
Sweep indication....................
(8) High power operation.............
(9) Quiet operation.......................
(3) Temperature setting
60 – 86 °F
When set to 80 °F
temperature indication............
7
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REMOTE CONTROLLER
Sensor
Transmitter
(Cover closed)
Display
ON/OFF operation button
1 HR. TIMER button
QUIET button
Temperature setting buttons (TEMP.)
MODE selector button
NIGHT SETBACK button
HIGH POWER button
FAN SPEED selector button
FLAP button
ON TIME
setting
buttons
Advance button
Return button
OFF TIME
setting
buttons
Advance button
Return button
CLOCK button
CANCEL button
SENSOR button
Time display selector button
ACL button
ADDRESS switch
Temperature display
selector button
The illustration above pictures the remote controller after the cover has been
opened.
NOTE
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.
Sensor A temperature sensor inside the remote controller senses the room temperature.
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.
QUIET button
: When you press this button, the fan rotates slower than the fan speed
setting to provide a quieter operating sound.
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.
8
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REMOTE CONTROLLER (CONTINUED)
Temperature setting buttons Press the
(TEMP.) Press the
button to increase the set temperature.
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.
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 “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.
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.
When you press the FLAP button, the air flow direction will be changed one by
one as follows.
NOTE
SWEEP
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 1 step above “High”.
ON TIME/OFF TIME setting No display: The timer does not operate.
buttons
: 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”.
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.
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.
NOTE
9
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REMOTE CONTROLLER (CONTINUED)
Temperature Display Selector This switches the temperature display between °C and °F.
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.
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.
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.
NOTE
USING THE REMOTE CONTROLLER
How to Install Batteries
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.
ACL button
•
The batteries last about six months, depending on how much you use
the 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.
CAUTION
•
•
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.
Information for Users on Collection and Disposal of Old Equipment and used Batteries
[Information on Disposal in other
Countries outside the European Union]
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.
Note for the battery symbol (bottom two
symbol examples):
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.
Pb
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USING THE REMOTE CONTROLLER (CONTINUED)
How to Use the Remote When using the remote controller, always point the unit’s transmitter head directly
Controller at the air conditioner’s receiver.
Air Conditioner
(Indoor unit)
Receiver
Remote Controller
(Transmitter head)
Remote Controller Installation The remote controller may be operated either from a non-fixed position or from a
Position wall-mounted position. 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 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)
Mounting the Remote Before mounting the remote controller, press the ON/OFF operation button at the
Controller 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.
Remote Control
Holder
Rear Side
Press
Mounting Screws
5/32 x 5/8" (4 x 16 mm)
(included)
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.
To take out the remote controller, pull it forward.
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.
•
Make sure that there are no objects between the remote controller and
receiver which could block the signal.
11
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OPERATION WITH THE REMOTE CONTROLLER
1. Operation
STEP 2
STEP 3
STEP 1
STEP 4
STEP 5
Check that the circuit breaker on the power panel is turned on.
NOTE
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 dehumidifying operation
For cooling operation
For fan only operation
o
o
o
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.
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 20.)
To stop the air conditioner, press the ON/OFF operation button again.
12
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
•
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.
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
3. Fan Only
If you want to adjust fan speed manually during operation, just set the FAN
SPEED selector button as desired. [
,
, or
]
STEP 2
STEP 1
STEP 3
If you want to circulate air without any temperature control, follow these steps:
STEP 1
STEP 2
STEP 3
Press the MODE selector button to switch to the fan mode
Press the ON/OFF operation button.
.
Press the FAN SPEED selector button to select the fan speed of
your choice ( or ).
,
13
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
4. Night Setback Mode
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.
NOTE
Pressing the MODE selector button cancels Night Setback mode.
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.
)
2 °F
Setting
temperature
2 °F
30 min.
30 min.
Press the NIGHT
SETBACK button
Time
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
5. QUIET Mode
QUIET Mode is used to reduce the fan sound of the indoor unit.
Press the QUIET button.
The
mark appears in the display.
To cancel, press QUIET button again.
•
•
In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.
If the unit is already operating with a very low airflow, the fan sound may not
change even if the QUIET button is pressed.
6. HIGH POWER Mode
HIGH POWER mode can be used to increase the output of the indoor unit for all
operation modes.
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”.
QUIET Mode and HIGH POWER Mode cannot be used at the same time.
• Pressing the MODE selector button cancels HIGH POWER
mode.
NOTE
• Depending on the operating conditions, the fan speed may be
increased by a small amount only.
15
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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.
Cooling ( ) Operation
•
Sometimes the indoor unit may not get to the set fan speed such as LOW and
QUIET 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 the event of power failure, the unit will stop. When the power is resumed,
the unit will restart automatically within 15 minutes by the remote controller.
Power failure during
operation
Clicking Sound
Clicking sound is heard from
the air conditioner
•
•
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.
The remote controller sends the setting condition to the air conditioner
regularly at five minute intervals.
Remote Controller
16
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SETTING THE TIMER
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.
NOTE
•
•
Temperature: °F
Time: AM, PM
(Example) To set to 10:30 pm.
1. How to set the present
time
Operation
Indication
1. Press the CLOCK button once if
The time indication alone flashes.
the time indicator is not flashing.
2. Press the Advance, Return ( ,
) button until PM 10:30 is
displayed.
The time can be set in 1-minute
increments. Holding down the button
advances the time rapidly in 10-minute
increments.
3. Press the CLOCK button again.
This completes the setting of the
current time.
(Example) To stop the air conditioner at 11:00 am.
2. How to set the OFF time
Operation
Indication
1. Press the OFF TIME setting
The timer
indication is displayed,
button once.
and the present OFF time is shown.
2. Press the Advance, Return ( ,
) button until AM 11:00 is
displayed.
The timer indication blinks.
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 The timer
indication stops
setting is complete.
blinking and the present time is
displayed.
17
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SETTING THE TIMER (CONTINUED)
(Example) To start operation at 7:10 am.
3. How to set the ON time
Operation
Indication
1. Press the ON TIME setting
The timer
indication is displayed,
button once.
and the present ON time is shown.
2. Press the Advance, Return ( ,
) button until AM 7:10 is
displayed.
The timer
indication blinks.
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 stops
the setting is complete.
blinking and the present time is
displayed.
(Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.
4. How to set DAILY ON/OFF
REPEAT timer
10:30 pm.
Present time
7:10 am.
ON
11:00 am.
OFF
Operation
Indication
1. Set the timer ON/OFF times as
The present time 10:30 pm. and
are displayed.
shown in 2-1, 2, 3 and 3-1, 2, 3.
•
The ON/OFF combination timer uses the current time as the
reference, and it is activated starting from whichever set time
comes first.
NOTE
•
•
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.
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.
•
•
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.
NOTE
18
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USING THE 1-HOUR OFF TIMER
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.
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.
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.
The 1-Hour Timer function is now cancelled and the unit operates normally.
•
•
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
2. Operation together with the The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT
DAILY ON/OFF REPEAT Timer setting.
TIPS FOR ENERGY SAVING
Avoid
Do
•
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.
•
•
•
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.
19
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ADJUSTING THE AIRFLOW DIRECTION
1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your
hands to the left or right.
When the humidity is high, the vertical vanes should be in the front
CAUTION
position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation may
begin to form around the air vent and drip down.
2. Vertical 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.
COOL
SWEEP
DRY
FAN
A. Sweep function
B. Setting the airflow manually
Referring to the above illustration, use the
The flap starts moving up and down to
deliver air over the sweep range.
FLAP button to set the airflow direction
within the range used during the cooling or
dehumidifying operation.
C. Auto flap function
The flap is set to the recommended
position.
•
The flap automatically closes when the unit is off.
NOTE
•
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.
CAUTION
•
Condensation may begin to form around the air vent and drip down.
20
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OPERATION WITHOUT THE REMOTE CONTROLLER
INDOOR UNIT
If you have lost the remote controller or it has trouble, follow the steps below.
When the air conditioner is not running
Each time the OPERATION button is pressed, the operation mode changes
cyclically.
Cooling operation
Stop
OPERATION button
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.
NOTE
CARE AND CLEANING
1. For safety, be sure to turn the air conditioner off and also to disconnect
the power before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the
internal components and cause an electric shock hazard.
Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or
wipe them with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out of place.
1. Never use solvents, or harsh chemicals when cleaning the indoor unit.
CAUTION
Do not wipe the plastic casing using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be
cleaned every year. Consult your dealer or service center.
21
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CARE AND CLEANING (CONTINUED)
Filter The filter behind the air intake grille should be checked and cleaned at least once
every two weeks.
How to remove the filter 1. Grasp both ends of the air
Air intake grille
intake grille, and remove it by
opening towards the front and
pulling towards you.
2. Remove the filter attached to
filter
the rear of the air intake grille.
Cleaning 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.
How to replace the filter 1. With the FRONT mark of the
filter
filter at the front, align the two
indentions near the mark with
the hooks at the rear of the air
intake grille, and then mount
the filter.
FRONT mark
Hook
Groove
Pin
2. Allow the edge of the air intake
grille to slide into the top of the
indoor unit, and then insert it
all the way inside.
Air intake grille
3. Press in the bottom right and
left corners of the air intake
grille to attach the indoor unit.
Air intake grille
Attach so that the round pins at the top right and left corners of the air intake grille
are inserted into the grooves at the top right and left of the indoor unit.
NOTE
22
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CARE AND CLEANING (CONTINUED)
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.
•
The air intake grille can be removed in order to wash it with water.
Removing and remounting the Refer to “How to remove the filter” and “How to replace the filter” on page 22.
air intake grille
When using a footstool or the like, be careful not to let it tip over.
CAUTION
Washing the grille with water
•
•
Clean the grille gently using a soft sponge, or the like. Then wipe away any
remaining moisture.
Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly
with water and wipe away any remaining moisture.
WIRED REMOTE CONTROLLER
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 both the optional wired remote controller and its
connection kit (CZ-RC515U).
23
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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.
Trouble
Possible Cause
1. Power failure.
Remedy
1. Restore power.
Air conditioner does not run at all.
2. Leakage circuit breaker tripped.
2. Contact service center.
3. Consult your electrician or dealer.
4. Replace batteries.
3. Line voltage is too low.
4. Batteries in remote controller have
run down.
OPERATION lamp blinks and air
conditioner does not operate.
Trouble in system.
Contact service center.
Remove obstruction.
Compressor runs but soon stops.
Obstruction in front of condenser coil.
(Outdoor Unit)
Poor cooling performance.
1. Dirty or clogged air filter.
1. Clean air filter to improve airflow.
2. Eliminate heat source if possible.
3. Shut them to keep the heat out.
4. Remove it to ensure good airflow.
2. Heat source or many people in room.
3. Doors and/or windows are open.
4. Obstacle near air intake or air
discharge port.
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 shrink due to a sudden
This is normal, and the sound will soon
disappear.
temperature change. In this event, a
clicking sound may occur.
OPERATION lamp lights but outdoor
unit will not run.
The use of cellular phones near the air
conditioner may cause disturbance to
its normal operation.
1. Turn off the power then restart the
air conditioner after a while.
2. Consult your dealer.
OPERATING RANGE
The air conditioner is operable within the temperature ranges as listed below:
Temperature
Indoor air temperature
Outdoor air temperature
COOLING
Max.
Min.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
14 °F DB
24
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SPECIFICATIONS
Indoor Unit
CS-MKS9NKU
Model No.
CS-MKS7NKU
CS-MKS12NKU
Power Source
Cooling Capacity
Single-phase, 208-230 V, 60 Hz
2.20
7,500
-
-
33/30/27
-
2.65
9,000
-
-
34/31/28
-
3.50
11,900
kW
BTU/h
kW
BTU/h
dB(A)
dB(A)
-
Heating Capacity
-
36/33/29
-
Cooling Operation (H/M/L)
Operation
Sound
Heating Operation (H/M/L)
Unit Dimensions (H×W×D)
(Indoor unit : Include panel)
11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16 11-7/32×32-15/32×7-7/16
inch(mm)
(285×825×189)
(285×825×189)
(285×825×189)
lbs.(kg)
Net Weight
19.8(9.0)
19.8(9.0)
19.8(9.0)
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 ] 30,600 [ 9,800 ~ 30,600 ]
9.00 [ 2.90 ~ 9.00 ]
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)
25
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APPENDIX B Operating Instructions
CS-MKS18NKU
CS-MKS24NKU
(852-6-4181-215-00-1)
A-2
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Operating Instructions
Split System Air Conditioner
Model No.
Indoor Units
Outdoor Units
CS-MKS18NKU
CS-MKS24NKU
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
This air conditioner uses the refrigerant R410A.
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.
Panasonic Corporation
1006 Kadoma, Kadoma City, Osaka, Japan
85264181215001
CV6233187631
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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
•
Air Sweep Control
The interior compartment of the remote controller
contains several features to facilitate automatic operation,
easy logically displayed for easy use.
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
during heating, cooling, and drying operation.
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.
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.
•
Quiet Operation
The fan rotates slower than the fan speed setting to
provide a quieter operating sound.
Automatic and 3-step Fan Speed
Auto/High/Medium/Low
CONTENTS
Page
Page
FEATURES............................................................................. 2
PRODUCT INFORMATION.................................................... 2
SAFETY PRECAUTIONS....................................................... 2
INSTALLATION LOCATION.................................................... 3
ELECTRICAL REQUIREMENTS ........................................... 3
SAFETY INSTRUCTIONS...................................................... 3
NAMES OF PARTS ................................................................ 5
USING THE REMOTE CONTROLLER ................................ 10
OPERATION WITH THE REMOTE CONTROLLER ............ 12
1. Operation .............................................................. 12
2. Adjusting the Fan Speed....................................... 13
3. Fan Only................................................................ 13
4. Night Setback Mode.............................................. 14
5. QUIET Mode ......................................................... 15
6. HIGH POWER Mode............................................. 15
SPECIAL REMARKS ........................................................... 16
SETTING THE TIMER ......................................................... 17
USING THE 1-HOUR OFF TIMER....................................... 19
TIPS FOR ENERGY SAVING .............................................. 19
ADJUSTING THE AIRFLOW DIRECTION........................... 20
OPERATION WITHOUT THE REMOTE CONTROLLER..... 21
CARE AND CLEANING ....................................................... 21
WIRED REMOTE CONTROLLER........................................ 23
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) .... 24
OPERATING RANGE........................................................... 24
SPECIFICATIONS................................................................ 25
PRODUCT INFORMATION
SAFETY PRECAUTIONS
The following symbols used in this manual, alert you
to potentially dangerous conditions to users, service
personnel or the appliance:
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.
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
CAUTION
personal injury or product or property
damage.
2
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INSTALLATION LOCATION
•
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 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.
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.
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.
Pull off the power plug from a receptacle, or switch off the breaker, or switch off
NOTE
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.
•
•
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.
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.
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•
•
•
To prevent possible hazards from insulation failure, the unit must
be grounded.
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 turn the air conditioner on and off from the power mains switch.
Use the ON/OFF operation button.
CAUTION
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.
Do not let children play with the air conditioner.
Do not cool or heat the room too much if babies or invalids are present.
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.
•
•
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.
NOTICE
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:
• 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.
•
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
Air Intakes
INDOOR UNIT
Air Outlet
Remote Controller
Drain Hose
Refrigerant Tubes
OUTDOOR UNIT
Air Outlet
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.
NOTE
This air conditioner consists of an indoor unit and an outdoor unit. You can control
the air conditioner with the remote controller.
Air Intake Air from the room is drawn into this section and passes through air filters which
remove dust.
Air Outlet Conditioned air is blown out of the air conditioner through the air outlet.
Remote Controller The remote controller controls power ON/OFF, operation mode selection,
temperature, fan speed, timer setting, and air sweeping.
Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which
refrigerant gas flows.
Drain Hose Moisture in the room condenses and drains off through this hose.
Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and
other electrical components.
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UNIT DISPLAY AND OPERATION BUTTON
INDOOR UNIT
IMPORTANT
OPERATION lamp
TIMER lamp
QUIET lamp
Avoid using radio equipment
such as mobile phone near
(within 4 ft. (1.2m)) the remote
control receiver. Some radio
equipment may cause
QUIET
OPERATION button
malfunction of the unit.
If the trouble happens,
disconnect power and restart
the air conditioner after a few
minutes.
REMOTE CONTROL receiver
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.
Each time this button is pressed, the operation mode changes cyclically.
Cooling operation
Stop
OPERATION lamp This lamp lights when the system is in the continuous DRY (orange), COOL
(green) and FAN (green) mode.
TIMER lamp This lamp lights when the system is being controlled by the timer.
QUIET lamp This lamp lights during operation in the QUIET mode.
The unit’s display lamps are dimmed during operation in the NIGHT SETBACK
mode.
NOTE
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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
(1) Operation mode
(4) Timer
24-hour clock with ON/OFF
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. fla.dication.....................
Flap angle indication ..............
Sweep indication....................
(8) High power operation.............
(9) Quiet operation.......................
(3) Temperature setting
60 – 86 °F
When set to 80 °F
temperature indication............
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REMOTE CONTROLLER
Sensor
Transmitter
(Cover closed)
Display
ON/OFF operation button
1 HR. TIMER button
QUIET button
Temperature setting buttons (TEMP.)
MODE selector button
NIGHT SETBACK button
HIGH POWER button
FAN SPEED selector button
FLAP button
ON TIME
setting
buttons
Advance button
Return button
OFF TIME
setting
buttons
Advance button
Return button
CLOCK button
CANCEL button
SENSOR button
Time display selector button
ACL button
ADDRESS switch
Temperature display
selector button
The illustration above pictures the remote controller after the cover has been
opened.
NOTE
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.
Sensor A temperature sensor inside the remote controller senses the room temperature.
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.
QUIET button
: When you press this button, the fan rotates slower than the fan speed
setting to provide a quieter operating sound.
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.
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REMOTE CONTROLLER (CONTINUED)
Temperature setting buttons Press the
(TEMP.) Press the
button to increase the set temperature.
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.
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 “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.
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.
When you press the FLAP button, the air flow direction will be changed one by
one as follows.
NOTE
SWEEP
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 1 step above “High”.
ON TIME/OFF TIME setting No display: The timer does not operate.
buttons
: 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”.
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.
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.
NOTE
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REMOTE CONTROLLER (CONTINUED)
Temperature Display Selector This switches the temperature display between °C and °F.
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.
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.
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.
NOTE
USING THE REMOTE CONTROLLER
How to Install Batteries
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.
ACL button
•
The batteries last about six months, depending on how much you use
the 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.
CAUTION
•
•
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.
Information for Users on Collection and Disposal of Old Equipment and used Batteries
[Information on Disposal in other
Countries outside the European Union]
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.
Note for the battery symbol (bottom two
symbol examples):
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.
Pb
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USING THE REMOTE CONTROLLER (CONTINUED)
How to Use the Remote When using the remote controller, always point the unit’s transmitter head directly
Controller at the air conditioner’s receiver.
Air Conditioner
(Indoor unit)
Receiver
Remote Controller
(Transmitter head)
Remote Controller Installation The remote controller may be operated either from a non-fixed position or from a
Position wall-mounted position. 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 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)
Mounting the Remote Before mounting the remote controller, press the ON/OFF operation button at the
Controller 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.
Remote Control
Holder
Rear Side
Press
Mounting Screws
5/32 x 5/8" (4 x 16 mm)
(included)
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.
To take out the remote controller, pull it forward.
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.
•
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
STEP 2
STEP 3
STEP 1
STEP 4
STEP 5
Check that the circuit breaker on the power panel is turned on.
NOTE
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 dehumidifying operation
For cooling operation
For fan only operation
o
o
o
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.
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 20.)
To stop the air conditioner, press the ON/OFF operation button again.
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
•
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.
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
3. Fan Only
If you want to adjust fan speed manually during operation, just set the FAN
SPEED selector button as desired. [
,
, or
]
STEP 2
STEP 1
STEP 3
If you want to circulate air without any temperature control, follow these steps:
STEP 1
STEP 2
STEP 3
Press the MODE selector button to switch to the fan mode
Press the ON/OFF operation button.
.
Press the FAN SPEED selector button to select the fan speed of
your choice ( or ).
,
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
4. Night Setback Mode
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.
NOTE
Pressing the MODE selector button cancels Night Setback mode.
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.
)
2 °F
Setting
temperature
2 °F
30 min.
30 min.
Press the NIGHT
SETBACK button
Time
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OPERATION WITH THE REMOTE CONTROLLER (CONTINUED)
5. QUIET Mode
QUIET Mode is used to reduce the fan sound of the indoor unit.
Press the QUIET button.
The
mark appears in the display.
To cancel, press QUIET button again.
•
•
In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.
If the unit is already operating with a very low airflow, the fan sound may not
change even if the QUIET button is pressed.
6. HIGH POWER Mode
HIGH POWER mode can be used to increase the output of the indoor unit for all
operation modes.
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”.
QUIET Mode and HIGH POWER Mode cannot be used at the same time.
• Pressing the MODE selector button cancels HIGH POWER
mode.
NOTE
• Depending on the operating conditions, the fan speed may be
increased by a small amount only.
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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.
Cooling ( ) Operation
•
Sometimes the indoor unit may not get to the set fan speed such as LOW and
QUIET 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 the event of power failure, the unit will stop. When the power is resumed,
the unit will restart automatically within 15 minutes by the remote controller.
Power failure during
operation
Clicking Sound
Clicking sound is heard from
the air conditioner
•
•
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.
The remote controller sends the setting condition to the air conditioner
regularly at five minute intervals.
Remote Controller
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SETTING THE TIMER
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.
NOTE
•
•
Temperature: °F
Time: AM, PM
(Example) To set to 10:30 pm.
1. How to set the present
time
Operation
Indication
1. Press the CLOCK button once if
The time indication alone flashes.
the time indicator is not flashing.
2. Press the Advance, Return ( ,
) button until PM 10:30 is
displayed.
The time can be set in 1-minute
increments. Holding down the button
advances the time rapidly in 10-minute
increments.
3. Press the CLOCK button again.
This completes the setting of the
current time.
(Example) To stop the air conditioner at 11:00 am.
2. How to set the OFF time
Operation
Indication
1. Press the OFF TIME setting
The timer
indication is displayed,
button once.
and the present OFF time is shown.
2. Press the Advance, Return ( ,
) button until AM 11:00 is
displayed.
The timer indication blinks.
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 The timer
indication stops
setting is complete.
blinking and the present time is
displayed.
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SETTING THE TIMER (CONTINUED)
(Example) To start operation at 7:10 am.
3. How to set the ON time
Operation
Indication
1. Press the ON TIME setting
The timer
indication is displayed,
button once.
and the present ON time is shown.
2. Press the Advance, Return ( ,
) button until AM 7:10 is
displayed.
The timer
indication blinks.
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 stops
the setting is complete.
blinking and the present time is
displayed.
(Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.
4. How to set DAILY ON/OFF
REPEAT timer
10:30 pm.
Present time
7:10 am.
ON
11:00 am.
OFF
Operation
Indication
1. Set the timer ON/OFF times as
The present time 10:30 pm. and
are displayed.
shown in 2-1, 2, 3 and 3-1, 2, 3.
•
The ON/OFF combination timer uses the current time as the
reference, and it is activated starting from whichever set time
comes first.
NOTE
•
•
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.
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.
•
•
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.
NOTE
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USING THE 1-HOUR OFF TIMER
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.
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.
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.
The 1-Hour Timer function is now cancelled and the unit operates normally.
•
•
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
2. Operation together with the The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT
DAILY ON/OFF REPEAT Timer setting.
TIPS FOR ENERGY SAVING
Avoid
Do
•
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.
•
•
•
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.
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ADJUSTING THE AIRFLOW DIRECTION
1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your
hands to the left or right.
When the humidity is high, the vertical vanes should be in the front
CAUTION
position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation may
begin to form around the air vent and drip down.
2. Vertical 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.
COOL
SWEEP
DRY
FAN
A. Sweep function
B. Setting the airflow manually
Referring to the above illustration, use the
The flap starts moving up and down to
deliver air over the sweep range.
FLAP button to set the airflow direction
within the range used during the cooling or
dehumidifying operation.
C. Auto flap function
The flap is set to the recommended
position.
•
The flap automatically closes when the unit is off.
NOTE
•
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.
CAUTION
•
Condensation may begin to form around the air vent and drip down.
20
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OPERATION WITHOUT THE REMOTE CONTROLLER
INDOOR UNIT
If you have lost the remote controller or it has trouble, follow the steps below.
When the air conditioner is not running
Each time the OPERATION button is pressed, the operation mode changes
cyclically.
Cooling operation
Stop
OPERATION button
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.
NOTE
CARE AND CLEANING
1. For safety, be sure to turn the air conditioner off and also to disconnect
the power before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the
internal components and cause an electric shock hazard.
Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or
wipe them with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out of place.
1. Never use solvents, or harsh chemicals when cleaning the indoor unit.
CAUTION
Do not wipe the plastic casing using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be
cleaned every year. Consult your dealer or service center.
21
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CARE AND CLEANING (CONTINUED)
Filter The filter behind the air intake grille should be checked and cleaned at least once
every two weeks.
How to remove the filter 1. Grasp both ends of the air
Air intake grille
intake grille, and remove it by
opening towards the front and
pulling towards you.
2. Remove the filter attached to
filter
the rear of the air intake grille.
Cleaning 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.
How to replace the filter 1. With the FRONT mark of the
filter
filter at the front, align the two
indentions near the mark with
the hooks at the rear of the air
intake grille, and then mount
the filter.
FRONT mark
Hook
Groove
Pin
2. Allow the edge of the air intake
grille to slide into the top of the
indoor unit, and then insert it
all the way inside.
Air intake grille
3. To attach the air intake grille to
the indoor unit, press its
bottom right and left corners as
well as its bottom center into
place.
Air intake grille
Attach so that the round pins at the top right and left corners of the air intake grille
are inserted into the grooves at the top right and left of the indoor unit.
NOTE
22
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CARE AND CLEANING (CONTINUED)
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.
•
The air intake grille can be removed in order to wash it with water.
Removing and remounting the Refer to “How to remove the filter” and “How to replace the filter” on page 22.
air intake grille
When using a footstool or the like, be careful not to let it tip over.
CAUTION
Washing the grille with water
•
•
Clean the grille gently using a soft sponge, or the like. Then wipe away any
remaining moisture.
Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly
with water and wipe away any remaining moisture.
WIRED REMOTE CONTROLLER
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 both the optional wired remote controller and its
connection kit (CZ-RC515U).
23
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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.
Trouble
Possible Cause
1. Power failure.
Remedy
1. Restore power.
Air conditioner does not run at all.
2. Leakage circuit breaker tripped.
2. Contact service center.
3. Consult your electrician or dealer.
4. Replace batteries.
3. Line voltage is too low.
4. Batteries in remote controller have
run down.
OPERATION lamp blinks and air
conditioner does not operate.
Trouble in system.
Contact service center.
Remove obstruction.
Compressor runs but soon stops.
Obstruction in front of condenser coil.
(Outdoor Unit)
Poor cooling performance.
1. Dirty or clogged air filter.
1. Clean air filter to improve airflow.
2. Eliminate heat source if possible.
3. Shut them to keep the heat out.
4. Remove it to ensure good airflow.
2. Heat source or many people in room.
3. Doors and/or windows are open.
4. Obstacle near air intake or air
discharge port.
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 shrink due to a sudden
This is normal, and the sound will soon
disappear.
temperature change. In this event, a
clicking sound may occur.
OPERATION lamp lights but outdoor
unit will not run.
The use of cellular phones near the air
conditioner may cause disturbance to
its normal operation.
1. Turn off the power then restart the
air conditioner after a while.
2. Consult your dealer.
OPERATING RANGE
The air conditioner is operable within the temperature ranges as listed below:
Temperature
Indoor air temperature
Outdoor air temperature
COOLING
Max.
Min.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
14 °F DB
24
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SPECIFICATIONS
Indoor Unit
Model No.
CS-MKS18NKU
CS-MKS24NKU
Power Source
Cooling Capacity
Single-phase, 208-230 V, 60 Hz
5.15
17,500
7.10
24,200
kW
BTU/h
kW
BTU/h
dB(A)
dB(A)
-
-
Heating Capacity
-
41/38/34
-
-
44/41/38
-
Cooling Operation (H/M/L)
Operation
Sound
Heating Operation (H/M/L)
Unit Dimensions (H×W×D)
(Indoor unit : Include panel)
11-23/32×41-15/16×8-5/8
(298×1,065×219)
11-23/32×41-15/16×8-5/8
(298×1,065×219)
inch(mm)
lbs.(kg)
Net Weight
26.5(12.0)
26.5(12.0)
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 ] 30,600 [ 9,800 ~ 30,600 ]
9.00 [ 2.90 ~ 9.00 ]
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)
25
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APPENDIX C INSTALLATION INSTRUCTIONS
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
(852-6-4190-580-00-0)
A-3
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For Indoor Unit
INSTALLATION INSTRUCTIONS
Split System Air Conditioner
Contents
This air conditioner uses the refrigerant R410A.
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
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
CU-3KS19NBU
CU-4KS24NBU
CU-4KS31NBU
2. INSTALLATION SITE SELECTION ................... 5
2-1. Indoor Unit
2-2. Embedding the Tubing and Wiring
3. HOW TO INSTALL THE INDOOR UNIT ............. 7
3-1. Remove the Rear Panel from the Unit
3-2. Make a Hole
3-3. Install the Rear Panel on the Wall
3-4. Removing and Installing the Grille
3-5. Shape the Indoor Side Tubing
3-6. Wiring Instructions
Power Source:
60 Hz, single-phase, 230 / 208 VAC
3-7. Wiring Instructions for Inter-unit Connections
3-8. Mounting
3-9. Drain Hose
4. HOW TO TEST RUN THE AIR CONDITIONER... 17
5. REMOTE CONTROLLER INSTALLATION
POSITION ......................................................... 18
5-1. Mounting on a Wall
6. ADDRESS SWITCH.......................................... 19
6-1. Address Setting of the Remote Controller
7. CONNECTING A HOME AUTOMATION
DEVICE.............................................................. 20
8. INSTALLATION CHECK SHEET ...................... 20
CV6233187778
85264190580000 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.
…In a Room
This symbol refers to a hazard
or unsafe practice which can
result in severe personal injury
or death.
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
When Connecting Refrigerant Tubing
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.
‡ :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-
In Case of Improper Installation
The manufacturer shall in no way be responsible for improp-
er installation or maintenance service, including failure to
follow the instructions in this document.
rant cycle.
WARNING
‡ 5HIULJHUDQWꢀJDVꢀOHDNDJHꢀPD\
SPECIAL PRECAUTIONS
cause fire.
WARNING
When Wiring
‡ 'RꢀQRWꢀDGGꢀRUꢀUHSODFHꢀUHIULJHUDQW
other than specified type.
It may cause product damage,
burst and injury etc.
ELECTRICAL SHOCK CAN CAUSE SEVERE
PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN
SHOULD ATTEMPT TO WIRE THIS SYSTEM.
‡ 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.
‡ '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.
‡ *URXQGꢀWKHꢀXQLW following local electrical codes.
‡ &RQQHFWꢀDOOꢀZLULQJꢀWLJKWO\ꢁꢀ/RRVHꢀZLULQJꢀPD\ꢀFDXVHꢀRYHUꢂ
heating at connection points and a possible fire hazard.
‡ 7RꢀSUHYHQWꢀSRVVLEOHꢀKD]DUGVꢀIURPꢀLQVXODWLRQꢀIDLOXUHꢃ
the unit must be grounded.
‡ 'RꢀQRWꢀDGGꢀDQ\ꢀUHIULJHUDQWꢃꢀDLUꢃꢀRUꢀVXEVWDQFHꢀLQWRꢀWKH
refrigeration circuit other than the designated refrigerant
(R410A). Adding anything other than the specified refrig-
erant may cause the pressure to rise excessively in the
refrigeration circuit, rupturing the circuit and causing injury
or damage.
‡ 8VHꢀDOOꢂQHZꢀWXELQJꢀDQGꢀIODUHꢀQXWVꢀWRꢀPDNHꢀWKHꢀWXELQJꢀFRQꢂ
nections. Using any previous parts (from R22-based sys-
tems) may result in damage to the equipment, and may
lead to the refrigeration circuit rupturing, causing a seri-
ous accident.
2
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‡ $SSO\ꢀUHIULJHUDQWꢀOXEULFDQWꢀWRꢀWKHꢀPDWFKLQJꢀVXUIDFHVꢀRI
the flare and union tubes before connecting them, then
tighten the nut with a torque wrench for a leak-free
connection.
‡ &OHDQꢀXSꢀWKHꢀVLWHꢀDIWHUꢀ\RXꢀILQLVKꢃꢀUHPHPEHULQJꢀWRꢀFKHFN
that no metal scraps or bits of wiring have been left inside
the unit being serviced.
Others
‡ &KHFNꢀFDUHIXOO\ꢀIRUꢀOHDNVꢀEHIRUHꢀVWDUWLQJꢀWKHꢀWHVWꢀUXQꢁ
‡ 'RꢀQRWꢀOHDNꢀUHIULJHUDQWꢀZKLOHꢀSLSLQJꢀZRUNꢀIRUꢀDQꢀLQVWDOODWLRQ
or re-installation, and while repairing refrigeration parts.
Handle liquid refrigerant carefully as it may cause frost-
bite.
CAUTION
‡ 9HQWLODWHꢀDQ\ꢀHQFORVHGꢀDUHDVꢀZKHQꢀLQVWDOOLQJꢀRUꢀWHVWLQJ
the refrigeration system. Escaped refrigerant gas, on
contact with fire or heat, can produce dangerously
toxic gas.
When Servicing
‡ 7XUQꢀWKHꢀSRZHUꢀ2)) DWꢀWKHꢀPDLQꢀSRZHUꢀER[ꢀꢄPDLQVꢅ
before opening the unit to check or repair electrical
parts and wiring.
‡ &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.
‡ .HHSꢀ\RXUꢀILQJHUVꢀDQGꢀFORWKLQJꢀDZD\ꢀIURPꢀDQ\ꢀPRYLQJ
parts.
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
6. Sabre saw or key hole saw
7. Hacksaw
8. Core bits
9. Hammer
10. Drill
This booklet briefly outlines where and how to install the
air conditioning system. Please read over the entire set
of instructions for the indoor and outdoor units and make
sure all accessory parts listed are with the system before
beginning.
11. Tube cutter
1-1. Tools Required for Installation (not supplied)
1. Standard screwdriver
12. Tube flaring tool
13. Torque wrench
14. Adjustable wrench
15. Reamer (for deburring)
2. Phillips head screwdriver
3. Knife or wire stripper
4. Tape measure
5. Carpenter’s level
1-2. Accessories Supplied with Unit
Table 1
Parts
Figure
Q’ty
Parts
Figure
Q’ty
Parts
Clamp
Figure
Q’ty
Truss-head
Remote
Tapping screw
5Phillips
1
10
1
controller
5
/32
/8" (4 16 mm)
Drain hose
adapter
Remote control
holder
1
2
8
1
Rawl plug
Packed in the indoor unit.
AAA alkaline
battery
1-3. Optional Copper Tubing Kit
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).
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.
3. Use insulated copper wire for field wiring. Wire size
varies with the total length of wiring. Refer to 3-6.
Wiring Instructions for details.
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 tub-
ing as detailed in Table 2.
Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.
CAUTION
Cut each tube to the appropriate lengths 1' to 1'4"
(30 cm to 40 cm) to dampen vibration between units.
Table 2
Narrow Tube
Model
Wide Tube
Outer Dia.
Thickness
Outer Dia.
Thickness
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
1/4" (6.35 mm)
1/4" (6.35 mm)
1/4" (6.35 mm)
1/4" (6.35 mm)
1/4" (6.35 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm)
3/8" (9.52 mm)
3/8" (9.52 mm)
3/8" (9.52 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm)
0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)
0.0314" (0.8 mm) 5/8" (15.88 mm) 0.0393" (1.0 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
Indoor unit
2. Installation Site Selection
2-1. Indoor Unit
To prevent abnormal heat generation
WARNING
and the possibility of fire, do not
place obstacles, enclosures and
grilles in front of or surrounding the
air conditioner in a way that may
block air flow.
Drain hose
Outside drainage
AVOID:
Fig. 1
ꢀ direct sunlight.
ꢀ nearby heat sources that may affect performance of the
unit.
6" (15 cm)
min.
2" (5 cm)
min.
2" (5 cm)
min.
ꢀ areas where leakage of flammable gas may be expected.
ꢀ placing or allowing any obstructions near the air condition-
er inlet or outlet.
Front View
ꢀ installing in rooms that contain instant-on (rapid-start)
fluorescent lamps. (These may prevent the air conditioner
from receiving signals.)
Fig. 2
Tubing length (L1)
INDOOR
UNIT (1)
ꢀ places where large amounts of oil mist exist.
INDOOR
UNIT (2)
ꢀ installing in locations where there are devices that
generate high-frequency emissions.
Elevation
L2
L3
difference (H1) OUTDOOR
UNIT
H2
H3
DO:
ꢀ select an appropriate position from which every corner of
INDOOR
UNIT (3)
H4
INDOOR
L4
UNIT (4)
the room can be uniformly cooled. (High on a wall is best.)
Fig. 3a
ꢀ 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. (Fig. 1)
CAUTION
ꢀ allow room for operation and maintenance as well as
Indoor unit
Wall
unrestricted air flow around the unit. (Fig. 2)
For stable operation of the
air conditioner, do not
install wall-mounted type
indoor units less than 5'
(1.5 m) from floor level.
ꢀ install the unit within the maximum elevation difference
(H1, H2, H3, H4) above or below the outdoor unit and
ZLWKLQꢀDꢀWRWDOꢀWXELQJꢀOHQJWKꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢃꢀ/ꢆꢇ/ꢈꢇ/ꢉꢇ/ꢊꢅ
from the outdoor unit as detailed in Table 3 and Fig. 3a.
Minimum height
from floor level
5' (1.5 m)
Floor level
Fig. 3b
5
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ꢀ install the indoor unit more than 3.3' (1 m) away from any
antenna or power lines or connecting wires used for tele-
vision, radio, telephone, security system, or intercom.
Electrical noise from any of these sources may affect
operation.
ꢀ install in a sturdy manner to avoid increased operating
noise.
Table 3
Max.
Allowable
Tubing Length
Per Unit
Max. Allowable Total
Tubing Length
at Shipment
Limit of
Total Tubing Length
(L1+L2+L3) or
(L1+L2+L3+L4)
(ft.)
Limit of Elevation
Difference
(H1, H2, H3, H4)
(ft.)
Required Amount
of Additional
Refrigerant
Model
(L1+L2+L3) or
(L1+L2+L3+L4)
(ft.)
(oz./ft.)*
(ft.)
&8ꢂꢉ.6ꢆꢋ1%8
&8ꢂꢊ.6ꢈꢊ1%8
&8ꢂꢊ.6ꢉꢆ1%8
ꢌꢈ
ꢌꢈ
ꢆꢍꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢅ
ꢆꢍꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢅ
ꢍꢎ
ꢍꢎ
ꢍꢎ
³
ꢆꢍꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢇ/ꢊꢅ
ꢆꢍꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢇ/ꢊꢅ
ꢈꢎꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢇ/ꢊꢅ
ꢈꢉꢎꢀꢄ/ꢆꢇ/ꢈꢇ/ꢉꢇ/ꢊꢅ
ꢎꢁꢈꢈ
ꢎꢁꢈꢈ
ꢆꢎꢎ
* If total tubing length becomes 150 to 200 ft. (Max.) or 150 to 230 ft. (Max.), charge additional refrigerant (R410A) by 0.22 oz./ft.
No additional charge of compressor oil is necessary. For more detailed charging information, refer to the Technical & Service Manual.
2-2. Embedding the Tubing and Wiring
ꢀ Before beginning embedding installation work, consult
fully with agencies or offices related to the building’s
foundation, construction, electricity, and water.
ꢀ Wait to make connections to the embedded portion.
Each connection step is described later in this
manual.
ꢀ Securely cover the end of the embedded tubing to
prevent intrusion of dirt or moisture.
ꢀ If an embedded tube is to be left for a long time, fill
the tube with nitrogen and seal both ends securely.
If a tube is left open for an extended time, moisture in
the air inside the tubing may condense into water
droplets, and lead to water contamination of the refrig-
erant circuit.
ꢀ In order to prevent insulation breakdown and ground
faults, do not allow wiring ends to come in contact with
rainwater, or be subjected to condensation or dew.
ꢀ Apply sufficient thermal insulation to the refrigerant
tubing and drain pipes.
6
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3. How to Install the Indoor Unit
3-1. Remove the Rear Panel from the Unit
(1) Remove and discard the set screw on the rear
panel. (Fig. 6)
(2) Press the 2 ꢁ marks on the frame cover and disen-
gage the stationary tabs from the frame. (Fig. 7)
Set screw only for transportation
(3) Remove the rear panel.
Fig. 6
NOTE
Tubing can be extended in 5 or 6 directions as shown in
Fig. 8. Select the direction you need providing the short-
est run to the outside unit.
Rear panel
ꢀ When left tubing is to be done, switch the drain hose
and drain cap. (For details, refer to “Switching drain
hose and drain cap” on page 15.)
3-2. Make a Hole
(1) Place the rear panel from the indoor unit on the wall
at the location selected. Make sure the panel is hori-
zontal, using a carpenter’s level or tape measure to
measure down from the ceiling. Wait until after cut-
ting the hole before attaching the rear panel to the
wall.
marks
Fig. 7
Right-rear
tubing
Left
Left-rear
tubing
(recommended)
tubing
(2) Determine which side of the unit you should make
the hole for tubing and wiring. (Fig. 9a or 9b)
Right
tubing
Left-downward
tubing
Right-downward
tubing
NOTE
(Not applicable for
CS-MKS18NKU, CS-MKS24NKU)
In the case of left-rear tubing, use the measurement
points from the edge of the rear panel for precise place-
ment of the hose outlet. (Fig. 9a or 9b)
Fig. 8
(CS-MKS7NKU, CS-MKS9NKU, CS-MKS12NKU)
(3) Before making the hole, check carefully that no
studs or pipes are directly run behind the spot to be
cut.
2-3/4" (70 mm)
Also avoid areas where elec-
trical wiring or conduits are
located.
CAUTION
The above precautions are also applicable if tubing
goes through the wall in any other location.
Fig. 9a
(CS-MKS18NKU, CS-MKS24NKU)
2-3/8" (60 mm)
Fig. 9b
7
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(4) Using a sabre saw, key hole saw or hole-cutting drill
attachment, cut a hole in the wall. See Table 4 and
Fig. 10.
NOTE
Hole should be made at a slight downward slant to the
outdoor side.
Table 4
Indoor
side
Outdoor
side
Hole Dia.
CS-MKS7NKU
CS-MKS9NKU
CS-MKS12NKU
CS-MKS18NKU
CS-MKS24NKU
2-9/16" (65 mm)
3-5/32" (80 mm)
(5) Measure the thickness of the wall from the inside
edge to the outside edge and cut PVC pipe at a
slight angle 1/4" (6 mm) shorter than the thickness of
the wall. (Fig. 11)
Fig. 10
39&ꢀSLSHꢀꢄ/RFDOO\ꢀSXUFKDVHGꢅ
(6) Place the plastic cover over the end of the pipe (for
indoor side only) and insert the pipe in the wall.
(Fig. 12)
Cut at slight angle
3-3. Install the Rear Panel on the Wall
Fig. 11
Be sure to confirm that the wall is strong enough to sus-
pend the unit.
INSIDE
OUTSIDE
PVC pipe
Wall
See either Item a) or b) below depending on the wall type.
Plastic cover
ꢄ/RFDOO\ꢀSXUFKDVHGꢅ
Slight
angle
a) If Wooden Wall
(1) Attach the rear panel to the wall with the 8 screws
provided. (Fig. 13a or 13b)
Fig. 12
If you are not able to line up the holes in the rear
panel with the beam locations marked on the wall,
use rawl plugs or toggle bolts to go through the
holes on the panel or drill 3/16" (5 mm) dia. holes in
the panel over the stud locations and then mount the
rear panel.
(CS-MKS7NKU, CS-MKS9NKU, CS-MKS12NKU)
(2) Double check with a carpenter’s level or tape mea-
sure that the panel is level. This is important to
install the unit properly. (Fig. 14)
Fig. 13a
(3) Make sure the panel is flush against the wall. Any
space between the wall and unit will cause noise
and vibration.
(CS-MKS18NKU, CS-MKS24NKU)
b) If Block, Brick, Concrete or Similar Type Wall
Make 3/16" (4.8 mm) dia. holes in the wall. Insert rawl
plugs for appropriate mounting screws. (Fig. 15)
Fig. 13b
3/16"
(4.8 mm) dia. hole
Rawl plug
Fig. 14
Fig. 15
8
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Grille
Air intake grille
3-4. Removing and Installing the Grille
3-4-1. Indoor unit types
(CS-MKS7NKU, CS-MKS9NKU, CS-MKS12NKU)
Basically, these models can be installed and wired without
removing the grille. If access to any internal part is needed,
follow the steps as given below.
Fig. 16a
Be sure to wear work gloves
CAUTION
during installation to avoid being
cut by the sharp aluminum fins
of the heat exchanger.
How to remove the grille
(1) Grasp both ends of the air intake grille, and remove it by
opening towards the front and pulling towards you. (Fig.
16a)
Screw cover
Fig. 16b
Cover
(2) Remove the 2 screws. (Fig. 16b)
Thermistor
(3) Remove the screw on the right side cover plate and
open the cover. (Fig. 17a)
(4) Take out the thermistor from the grille. (Fig. 17b)
(5) Pull the lower part of the grille toward you to remove.
(Fig. 18a)
Thermistor
Fig. 17b
Fig. 17a
(6) Use a standard screwdriver to push on the tabs to
remove the grille.
Tab
*
Grille
Frame
How to replace the grille
*
(1) Reinstall the grille into the lower part while aligning
its tabs on the upper part. (Fig. 18b) Insert the tabs
in the slots and push the lower part of the grille back
into position.
Tab
(2) Make sure that the grille and frame are firmly fitted
together by engaging the tabs.
Fig. 18a
(3) Attach the thermistor on the grille. (Fig. 17a)
*
(4) Close the cover and replace the screw. (Fig. 17a)
*
(5) Affix the grille with the 2 previously removed screws.
(Fig. 16b)
(6) Install the air intake grille.
(a) Allow the edge of the air intake grille to slide into
the top of the indoor unit, and then insert it all
the way inside. (Fig. 19a)
Fig. 18b
(b) Press the bottom right and left corners of the air
intake grille to attach it to the indoor unit. (Fig. 19b)
Groove
NOTE
Pin
Attach so that the round pins at the top right and left corners
of the air intake grille are inserted into the grooves at the top
right and left of the
indoor unit.
Fig. 19b
Fig. 19a
9
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3-4-2. Indoor unit types
(CS-MKS18NKU, CS-MKS24NKU)
Grille
Air intake grille
Basically, these models can be installed and wired with-
out removing the grille. If access to any internal part is
needed, follow the steps as given below.
How to remove the grille
(1) Grasp both ends of the air intake grille, and remove
it by opening towards the front and pulling towards
you. (Fig. 16a-1)
Fig. 16a-1
(2) Remove the 3 screws. (Fig. 16b-1)
(3) Remove the screw on the right side cover plate and
open the cover. (Fig. 17a-1)
(4) Take out the thermistor from the grille. (Fig. 17b-1)
Fig. 16b-1
Cover
(5) Press the 3 tabs at the top of the grille and the 3
tabs on the front face to separate the grille from the
frame. (Fig. 18a-1)
Thermistor
Thermistor
(6) Pull the grill toward you to remove it.
How to replace the grille
Fig. 17a-1
(1) When installing the grille, place the bottom of the
grille into the frame first. (Fig. 18b-1)
Fig. 17b-1
Tab
Then insert the tabs on the top of the grille and on
the front face into the frame.
(2) Make sure that the grille and frame are firmly fitted
together by engaging the tabs.
(3) Attach the thermistor on the grille. (Fig. 17a-1)
(4) Close the cover and replace the screw. (Fig. 17a-1)
Tab
(5) Affix the grille with the 3 previously removed screws.
(Fig. 16b-1)
Fig. 18a-1
(6) Install the air intake grille.
(a) Allow the edge of the air intake grille to slide into
the top of the indoor unit, and then insert it all the
way inside. (Fig. 19a-1)
(b) Press the bottom right and left corners and center
of the air intake grille to attach it to the indoor
unit. (Fig. 19b-1)
Fig. 18b-1
NOTE
Groove
Attach so that the round pins at the top right and left cor-
ners of the air intake grille are inserted into the grooves
at the top right and left of the indoor unit.
Pin
Fig. 19b-1
Fig. 19a-1
10
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3-5. Shape the Indoor Side Tubing
(1) Arrangement of tubing by directions
a) Right or left tubing
Frame
Cut out the corner of the right/left frame with a
hacksaw or the like. (Figs. 20 and 21)
Left tubing
outlet
b) Right-rear or left-rear tubing
In this case, the corner of the frame need not be
cut.
(2) To mount the indoor unit on the rear panel:
Fig. 20
Hang the 2 mounting slots of the unit on the
upper tabs of the rear panel. (Fig. 22)
Frame
3-6. Wiring Instructions
General precautions on wiring
Right tubing
outlet
(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 cir-
cuit breaker for overcurrent protection provided in
the exclusive line.
Fig. 21
(3) To prevent possible hazard 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.
Fig. 22
(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 manufacturer will accept no
responsibility for any damage or misoperation that
occurs as a result of such unauthorized changes.
11
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3-7. Wiring Instructions for Inter-unit Connections
Rear
Wall
(1) Insert the inter-unit wiring (according to local codes)
into the through-the-wall PVC pipe. Run the wiring
toward the indoor side allowing approx. 10" (25 cm)
to extend from the wall face. (Fig. 24)
panel
Plastic
cover
(2) Grasp both ends of the air intake grille, and remove
it by opening towards the front and pulling towards
you.
Wiring
10"
(3) Remove the screw on the right side cover plate and
open the cover. (Fig. 25)
(25 cm)
Fig. 24
Fig. 25
Fig. 26a
(4) Route the inter-unit wiring from the back of the
indoor unit and pull it toward the front for connec-
tion. (Figs. 26a and 26b)
Cover
(5) Connect the inter-unit wiring to the corresponding
terminals on the terminal plate (Figs. 26a and 26b)
while referring to the wiring diagram.
(6) Be sure to secure the wiring with the provided
clamp.
NOTE
When closing the air intake grille, press the bottom right
and left corners and center. (Fig. 27)
Please refer to “How to replace the grille” on page 9 or
10 for installing the air intake grille.
Terminal
plate
Fig. 27
Inter-unit
wiring
Earth
plate
/RFNꢀQXW
Top of conduit
connector
Fig. 26b
12
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Loose wiring may cause the
terminal to overheat or result
in unit malfunction. A fire
hazard may also exist. There-
fore, be sure all wiring is
tightly connected.
WARNING
When connecting each power wire to the corresponding
terminal, follow the instructions “How to connect wiring
to the terminal” and fasten the wire securely tight with
the fixing screw of the terminal plate.
9/32"
(7 mm)
(ACTUAL
SIZE)
STRIP
SIZE
How to connect wiring to the terminal
a) For Indoor Unit
Fig. 28
(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. 28) near the terminal plate.
Solid wire
/RRS
(2) Using a screwdriver, loosen the terminal screw on
the terminal plate.
(3) Insert the wire and tighten the terminal screw com-
pletely using a screwdriver.
Insulation
b) For Outdoor Unit
Fig. 29
ꢂ 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. 29)
Stranded wire
Ring
connector
(2) Using a screwdriver, remove the terminal screw(s)
on the terminal plate.
(3) Using the pliers, bend the solid wire to form a loop
suitable for the terminal screw.
Fig. 30
(4) Shape the loop wire properly, place it on the termi-
nal plate and fix it securely with the removed termi-
nal screw using a screwdriver.
Twist wire ends
ꢂ 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. 30
and 31)
Fig. 31
(2) Using a screwdriver, remove the terminal screw(s)
on the terminal plate.
Special
washer
Screw
(3) Using a ring connector fastener or pliers, securely
clamp each stripped wire end with a ring connector.
(Fig. 30)
Screw and
Ring connector
Terminal plate
special washer
Wire
Ring
connector
(4) Place the ring connector wire, and replace and
tighten the removed terminal screw using a screw-
driver. (Fig. 32)
Wire
Fig. 32
13
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3-8. Mounting
(1) To install the indoor unit, mount the indoor unit onto
the 2 tabs on the upper part of the rear plate.
(2) Hold down the air discharge outlet and press the
lower part of the indoor unit until it clicks to securely
fasten to the 2 tabs on the lower part of the rear
plate. (Fig. 33)
Push
NOTE
For tubing, choose either the right or left tubing direction
and follow the steps below. This work can be made easi-
er by placing padding material (such as styrofoam) at the
rear right side of the indoor unit. (Fig. 34)
Fig. 33
ꢂ Right-side tubing
(1) Shape the refrigerant tubing so that it can easily go
into the wall hole. (Fig. 35)
(2) Push the wiring, refrigerant tubing, and drain hose
through the hole in the wall. Adjust the indoor unit so
it is securely seated on the rear panel. (Fig. 36)
Padding material
(3) Carefully bend the tubing (if necessary) to run along
the wall in the direction of the outdoor unit and then
tape as far as the fittings. (See Caution on page 19
in the outdoor unit installation manual.) The drain
hose should come straight down the wall to a point
where water runoff won’t stain the wall.
Fig. 34
Rear panel
Cover
Refrigerant
tubing
(4) Connect the refrigerant tubing to the outdoor unit.
(After performing a leak test on the connecting part,
insulate it with the tubing insulation. (Fig. 37a))
Also, refer to Section 3-5. Tubing connections in the
outdoor unit installation manual.
Inter-unit
wiring
Drain hose
(5) Assemble the refrigerant tubing, drain hose, and
conduit (including inter-unit wiring) as shown in
Fig. 37b.
Fig. 35
Refrigerant tubing
Insulation
Fig. 37a
Conduit
Drain hose
Fig. 36
Inter-unit wiring
Fig. 37b
14
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ꢂ Left-side tubing
Rear panel
ꢄꢆꢅ /HDGꢀWKHꢀWXELQJꢀDQGꢀGUDLQꢀKRVHꢀWKURXJKꢀWKHꢀZDOOꢃ
allowing sufficient length for connection. Then bend
the tubing using a tube bender to make the attach-
ment. (Fig. 38)
Hole in wall
Wide tube
Narrow tube
Bent part
(2) Switch the drain hose and drain cap.
Fig. 38
Switching drain hose and drain cap
ꢄDꢅ /RFDWHꢀWKHꢀGUDLQꢀKRVHꢀDQGꢀWKHꢀGUDLQꢀFDSꢁꢀꢄ)LJꢁ
39)
(b) Remove the screw fastening the drain hose on
the right side, and pull out the drain hose to
remove it. (Fig. 39)
Drain cap
(c) Apply moderate force to pull off the drain cap
on the left side. (If you cannot pull it off by
hand, use a long-nose pliers.)
Drain hose
Fig. 39
(d) Reattach the drain hose to the left side and the
drain cap to the right side. (Fig. 40a)
Drain hose
Drain hose
Slide the drain hose fully onto the drain pan outlet
until the drain hose edge is pushed into the insula-
tion. Check that the screw holes in the drain bracket
and the drain pan outlet are aligned and securely in
contact, then fasten them with the screw. (After
attaching the drain hose, check that it is attached
securely.) (Fig. 40c)
Clamp
Drain cap
Drain cap
Use a Phillips screwdriver to push the drain cap in
firmly. (If it is difficult to push in, wet the cap with
water first.)
Fig. 40a
Screw hole
(3) Install the indoor unit on the rear panel.
(4) Connect the tubing and wiring led inside from out-
doors.
Drain pan outlet
(5) After completing a leak test, bundle the tubing
together with armoring tape and store it inside the
tubing storage area at the back of the indoor unit
and hold it with clamps. (Figs. 40a and 41)
Insulation
Drain bracket
Drain bracket
Screw
Drain hose
Drain hose
Fig. 40c
Fig. 40b
Refrigerant tubing
Inter-unit wiring
Conduit
Fig. 41
15
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To unmount indoor unit
Press the 2 ꢁ marks on the lower part of the indoor unit
and unlatch the tabs. Then lift the indoor unit and
unmount. (Fig. 42)
3-9. Drain Hose
a) The drain hose should be slanted downward to the
outdoors. (Fig. 43)
b) Never form a trap in the course of the hose.
c) If the drain hose will run in the room, insulate the
hose with insulation* so that chilled condensation
will not damage furniture or floors. (Fig. 44)
Push
* Foamed polyethylene or its equivalent is recom-
Fig. 42
mended.
Do not supply power to the
WARNING
unit or operate it until all
tubing and wiring to the out-
side unit are completed.
Slant
Indoor
unit
Drain
hose
Risk of Electric Shock
Fig. 43
Condensation
Insulation material
ꢄ/RFDOO\ꢀSXUFKDVHGꢅ
must be used.
Fig. 44
16
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4. 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. 59a)
a)Press and hold the QUIET button and the 1HR.
TIMER button.
Eꢅ7KHQꢀSUHVVꢀDQGꢀKROGꢀWKHꢀ$&/ ꢄ5HVHWꢅꢀEXWWRQꢀZLWKꢀD
pointed object such as the tip of a pen. After 5 sec-
RQGVꢃꢀUHOHDVHꢀWKHꢀ$&/ EXWWRQꢀILUVWꢁ
ON/OFF
operation
button
QUIET
button
c)Then release the QUIET and 1HR. TIMER buttons.
1HR.
d)
appears and “oP-1” blinking in the remote con-
troller clock display area. (Fig. 59b)
TIMER
button
(2) Start Cooling mode test run by pressing the ON/OFF
operation button of the remote controller. (Fig. 59a)
‡ 7KLVꢀVWDUWVꢀWKHꢀIDQꢀSURGXFLQJꢀXQFRROHGꢀIRUFHGꢀDLUꢀZLWK
the 3 indicator lamps (OPERATION lamp, TIMER
lamp and QUIET lamp) on the main unit blinking.
(Fig. 59c)
‡ $IWHUꢀꢉꢀPLQXWHVꢃꢀWKHꢀV\VWHPꢀVKLIWVꢀLQWRꢀFRROLQJꢀRSHUDꢂ
tion, and cool air will start to be felt. Cooling mode test
run is unaffected by the room temperature.
ACL
(Reset)
button
(3) Press the ON/OFF operation button of the remote con-
troller again to stop the test run. (Fig. 59a)
Fig. 59a
ꢄꢊꢅ )LQDOO\ꢀSUHVVꢀWKHꢀ$&/ ꢄ5HVHWꢅꢀEXWWRQꢀRIꢀWKHꢀUHPRWHꢀFRQꢂ
troller to release it from Test Run mode to return to nor-
mal mode. (Fig. 59a)
‡ ´ µꢀDQGꢀ´R3ꢂꢆµꢀZLOOꢀGLVDSSHDUꢀIURPꢀWKHꢀUHPRWHꢀFRQꢂ
troller clock display area.
NOTE
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 on the
inside of the front cover.
Fig. 59b
IMPORTANT
OPERATION lamp
TIMER lamp
QUIET lamp
After the test run is completed, be sure to press the
$&/ ꢄ5HVHWꢅꢀEXWWRQꢀWRꢀUHWXUQꢀWRꢀQRUPDOꢀPRGHꢁꢀ7KH
air conditioner will not operate correctly if this is not
done.
Fig. 59c
17
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5. Remote Controller Installation Position
The remote controller can be operated from either a
non-fixed position or a wall-mounted position.
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)
5-1. 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 x 5/8" (4 x 16 mm)
(Included)
To take out the remote controller, pull it forward.
Fig. 61
18
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6. Address Switch
Tab
6-1. Address Setting of the Remote Controller
The address can be set in order to prevent interference
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.
Fig. 62
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. 62). When the tab is removed, the address is
automatically set to B (Fig. 63).
$&/ꢀEXWWRQ
(3) Press and hold the remote controller QUIET button
and 1HR. TIMER button. Then, press and hold the
$&/ ꢄ5HVHWꢅꢀEXWWRQꢀZLWKꢀDꢀSRLQWHGꢀREMHFWꢀVXFKꢀDV
WKHꢀWLSꢀRIꢀDꢀSHQꢁꢀ$IWHUꢀꢍꢀVHFRQGVꢃꢀUHOHDVHꢀWKHꢀ$&/
button first, then release the QUIET and 1HR.
TIMER buttons. “oP-1” (Test Run) appears, blinking
in the remote controller clock display area.
Fig. 63
(4) Each time the 1HR. TIMER button is pressed, the
display changes as shown below. Press this button
2 times to change the display to “oP-7” (Address
setting). (Fig. 64)
Test run mode
ON/OFF
Selfdiagnostic mode
Address setting mode
operation
button
QUIET
button
1HR.
(5) “oP-7” has now been selected for address setting.
TIMER
button
(6) Press the ON/OFF operation button on the remote
controller. (Fig. 64) Check that the “beep”signal-
received sound is heard from the second indoor unit
(approximately 5 times). The sound you hear is the
signal that the remote controller address has been
changed.
ꢄꢏꢅ )LQDOO\ꢀSUHVVꢀWKHꢀUHPRWHꢀFRQWUROOHUꢀ$&/ ꢄ5HVHWꢅꢀEXWꢂ
ton to cancel the blinking “oP-7” display.
(Fig. 64)
ACL
Changing of the second remote controller address is
now completed.
(Reset)
button
Fig. 64
19
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7. Connecting a Home Automation Device
The HA (white) 4P terminal is located on the indoor unit PCB. If a HA device will
be used, connect it to this terminal.
8. Installation Check Sheet
The strength of the installation location is sufficient to support the air
conditioner weight.
The indoor and outdoor units are installed level and vertically.
The power and voltage are as specified.
Inter-unit cables are securely inserted into the terminal block.
Inter-unit cables are securely fixed.
The power cable and inter-unit cables are not connected anywhere along
their paths.
The ground wire is securely connected.
Thermal insulation has been applied to the tubing connections.
Drain connections are secure and water drains properly.
Putty has been used to close the hole in the wall.
Remote controller signals are being positively received.
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DC1111-0
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