Panasonic Air Conditioner CS KE18NB4UW User Manual
TECHNICAL & SERVICE MANUAL  
INDOOR UNIT : CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW& CZ-18BT1U  
DC INVERTER MULTI-SYSTEM AIR CONDITIONER  
Indoor Model No.  
Body (Panel)  
Product Code No.  
Body (Panel)  
Capacity  
9,000BTU / h CS-MKE9NB4U (CZ-18BT1U)  
1 852 361 10 (1 852 361 15)  
11,900BTU / h CS-MKE12NB4U (CZ-18BT1U) 1 852 361 11 (1 852 361 15)  
17,500BTU / h CS-KE18NB4UW (CZ-18BT1U) 1 852 361 07 (1 852 361 15)  
Semi-Concealed Type Indoor Unit  
Body  
< Applicable Multi-Outdoor Units >  
CU-3KE19NBU (3-room multi unit)  
CU-4KE24NBU (4-room multi unit)  
CU-4KE31NBU (4-room multi unit)  
Panel  
CS-MKE9NB4U (Body) & CZ-18BT1U (Panel)  
CS-MKE12NB4U (Body) & CZ-18BT1U (Panel)  
CS-KE18NB4UW (Body) & CZ-18BT1U (Panel)  
Remote Controller  
Wired Remote Controller  
(Option)  
REFERENCE NO. SM700882  
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Warning  
If refrigerant gas blows off during the work, do not touch the refrigerant gas as it may cause frostbite.  
Prohibit  
If refrigerant gas leaks during the work, ventilate the room.  
If refrigerant gas catches fire, harmful gas may be generated.  
Do not mix any gas other than the specified refrigerant gas in the refrigerating cycle.  
If air or other contaminants mix with the gas, pressure will become extremely high in the refrigerating cycle,  
which may cause a unit breakdown."  
Prohibit  
When the welded section of the compressor intake or discharge pipe is to be disconnected, perform it in  
a well-ventilated place after sufficiently recovering the refrigerant gas.  
Any residue gas may jet out refrigerant or refrigerating machine oil, which may cause an injury.  
When the work is to be performed in a high place (About 2 meters or more), make sure to wear a safety helmet,  
gloves and safety belt. Insufficient safety gear may cause a serious injury in case of a fall.  
When the unit is to be relocated, confirm that the new installation location has sufficient strength for the weight of the unit.  
Insufficient strength of the installation location and incomplete installation work may cause an injury due to  
the unit falling.  
When the remote controller batteries are replaced, dispose of the old batteries out of the reach of children.  
If a child swallows a battery, make sure that the child gets immediate medical attention.  
Caution  
Do not wash the air conditioner with water, as this may cause an electric shock or fire.  
Prohibit  
For the repair work in places with high humidity or moisture, make sure to ground the unit.  
Failure to do so may cause an electric shock.  
Confirm that the component attachment position, wiring condition, soldering condition and connector connection  
are normal.  
If not, it may cause overheating or fire.  
Confirm that the temperature around the compressor is not too high, and then perform the repair work.  
Failure to do so may cause a burn.  
Perform welding work in a place with good ventilation.  
If the work is performed in a poorly ventilated area, it might cause a lack of oxygen.  
If the installation plate or attachment frame has deteriorated due to corrosion, etc., replace it.  
Failure to do so may cause an injury due to the unit falling.  
When the cleaning is to be performed, make sure to turn off the power and pull out the plug.  
Touching the fan that is rotating at high speed may result in an injury.  
When the indoor unit is to be removed, do not place it on an incline.  
Doing so may cause wet furniture because water left inside may trickle down.  
Prohibit  
Prohibit  
Do not hold the sharp end of the unit or the aluminum fins, as it may cause an injury to your hand or finger.  
After repairs, make sure to measure the insulation resistance and confirm that the value is 1 Mohm or more.  
Any insulation error may cause an electric shock.  
After repairs, make sure to check the drainage of the indoor unit.  
Inappropriate drainage may cause wet furniture and floors due to water leakage.  
3
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TABLE OF CONTENTS  
Page  
.............................................................................................................  
2
4
6
7
SAFETY PRECAUTIONS  
....................................................................................................................  
....................................................................................  
TABLE OF CONTENTS  
APPLICABLE MULTI-OUTDOOR UNITS  
...................................................................................................................  
1. OPERATING RANGE  
2. SPECIFICATIONS  
.............................................................................................................  
.......................................................................................  
8
14  
17  
2-1. Unit Specifications  
2-2. Major Component Specifications  
2-3. Other Component Specifications  
.......................................................................................  
....................................................................................................................  
18  
19  
20  
21  
3. DIMENSIONAL DATA  
4. REFRIGERANT FLOW DIAGRAM  
..................................................................................................  
4-1. Refrigerant Flow Diagram  
5. ELECTRICAL DATA  
....................................................................................................  
5-1. Electric Wiring Diagrams  
6. MAINTENANCE  
.....................................................................................................  
6-1. Disassembly Procedure  
7. FUNCTIONS  
...........................................................................................................  
...........................................................................................................  
28  
30  
7-1. Operation Functions  
7-2. Protective Functions  
8.TROUBLESHOOTING (BEFORE CALLING FOR SERVICE)  
..........................................................  
31  
31  
33  
37  
38  
8-1. Precautions before Performing Inspection or Repair  
.................................................................................................  
..............................................................................  
8-2. Method of Self-Diagnostics  
8-3. Checking the Indoor and Outdoor Units  
..........................................................................................  
8-4. Trouble Diagnosis of Fan Motor  
..........................................................  
8-5. Noise Malfunction and Electromagnetic Interference  
............................................................................................  
A-1  
A-2  
A-3  
APPENDIX A Operating Instructions  
APPENDIX B Operating Instructions  
APPENDIX C INSTALLATION INSTRUCTIONS  
(CS-MKE9NB4U & CZ-18BT1U, CS-MKE12NB4U & CZ-18BT1U)  
............................................................................................  
(CS-KE18NB4UW & CZ-18BT1U)  
.............................................................................  
CS-MKE9NB4U & CZ-18BT1U, CS-MKE12NB4U & CZ-18BT1U,  
CS-KE18NB4UW & CZ-18BT1U  
(
)
4
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Page  
...........................................................................................  
A-4  
APPENDIX D Operating Instructions  
(CZ-RD515U)  
............................................................................  
A-5  
APPENDIX E INSTALLATION INSTRUCTIONS  
(CZ-RD515U)  
5
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APPLICABLE MULTI-OUTDOOR UNITS  
Multi-Outdoor Unit  
3-Room  
4-Room  
CU-4KE24NBU  
YES  
4-Room  
CU-4KE31NBU  
YES  
CU-3KE19NBU  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW & CZ-18BT1U  
YES  
YES  
YES  
YES  
YES  
YES  
YES  
6
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1. OPERATING RANGE  
Temperature  
Indoor Air Intake Temp.  
95 °F DB / 71 °F WB  
67 °F DB / 57 °F WB  
80 °F DB / 67 °F WB  
– DB / – WB  
Outdoor Air Intake Temp.  
115 °F DB  
Maximum  
Cooling  
Minimum  
14 °F DB  
Maximum  
Heating  
75 °F DB / 65 °F WB  
– DB / 0 °F WB  
Minimum  
7
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2. SPECIFICATIONS  
2-1. Unit Specifications  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
2-1-1.  
<230V>  
Type  
Semi-Concealed Type Indoor Unit  
230V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
12,300  
3.6  
Total Capacity  
BTU/h  
kW  
9,000  
2.65  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
221 (376) / 206 (350) / 194 (330) 247 (420) / 235 (399) / 224 (381)  
Pints/h  
3.4  
-
V
A
187 to 253  
0.1  
16  
0.12  
18  
Power Input  
W
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
33 / 32 / 31  
34 / 33 / 32  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
3/8 (9.52)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-MKE9NB4U & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-MKE9NB4U) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283) 1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
8
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Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
<208V>  
Type  
Semi-Concealed Type Indoor Unit  
208V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
12,300  
3.6  
Total Capacity  
BTU/h  
9,000  
2.65  
kW  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
221 (376) / 206 (350) / 194 (330) 247 (420) / 235 (399) / 224 (381)  
Pints/h  
3.4  
-
V
A
W
187 to 253  
0.11  
15  
0.13  
17  
Power Input  
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
33 / 32 / 31  
34 / 33 / 32  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
3/8 (9.52)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-MKE9NB4U & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-MKE9NB4U) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283) 1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
9
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2-1-2. Indoor Unit CS-MKE12NB4U & CZ-18BT1U  
<230V>  
Type  
Semi-Concealed Type Indoor Unit  
230V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
13,600  
4.0  
Total Capacity  
BTU/h  
11,900  
3.5  
kW  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
235 (399) / 206 (350) / 194 (330) 268 (455) / 247 (420) / 224 (381)  
Pints/h  
4.26  
-
V
A
W
187 to 253  
0.11  
17  
0.13  
19  
Power Input  
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
34 / 32 / 31  
35 / 34 / 32  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
3/8 (9.52)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-MKE12NB4U & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-MKE12NB4U) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283)  
1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
10  
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Indoor Unit  
CS-MKE12NB4U & CZ-18BT1U  
<208V>  
Type  
Semi-Concealed Type Indoor Unit  
208V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
13,600  
4.0  
Total Capacity  
BTU/h  
11,900  
3.5  
kW  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
235 (399) / 206 (350) / 194 (330) 268 (455) / 247 (420) / 224 (381)  
Pints/h  
4.26  
-
V
A
W
187 to 253  
0.12  
16  
0.14  
18  
Power Input  
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
34 / 32 / 31  
35 / 34 / 32  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
3/8 (9.52)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-MKE12NB4U & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-MKE12NB4U) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283)  
1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
11  
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2-1-3. Indoor Unit CS-KE18NB4UW & CZ-18BT1U  
<230V>  
Type  
Semi-Concealed Type Indoor Unit  
230V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
20,400  
6.0  
Total Capacity  
BTU/h  
17,500  
5.15  
kW  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
341 (579) / 294 (500) / 253 (430) 383 (651) / 324 (551) / 265 (450)  
Pints/h  
4.89  
-
V
A
W
187 to 253  
0.15  
22  
0.19  
27  
Power Input  
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
44 / 40 / 36  
44 / 40 / 36  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
1/2 (12.7)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-KE18NB4UW & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-KE18NB4UW) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283) 1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
12  
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Indoor Unit  
CS-KE18NB4UW & CZ-18BT1U  
<208V>  
Type  
Semi-Concealed Type Indoor Unit  
208V Single-Phase 60Hz  
Voltage Rating  
Cooling  
Heating  
20,400  
6.0  
Total Capacity  
BTU/h  
17,500  
5.15  
kW  
Air Circulation (Hi/Me/Lo)  
Moisture Removal (High)  
Available Voltage Range  
Running Amperes  
ft3/min (m3/h)  
341 (579) / 294 (500) / 253 (430) 383 (651) / 324 (551) / 265 (450)  
Pints/h  
4.89  
-
V
A
W
187 to 253  
0.16  
22  
0.2  
27  
Power Input  
-
-
Controls / Temperature Control  
Control Unit  
Microprocessor / I.C. Thermister  
Wireless Remote Control Unit  
Timer  
24-Hour ON or OFF Timer, 1-Hour OFF Timer  
Fan Speeds  
Indoor  
Horizontal  
Vertical  
Auto and 3 steps  
Airflow Direction (Indoor)  
-
Auto  
Air Filter  
Refrigerant  
Washable, Anti-Mold  
R410A  
Operation Sound  
Indoor : Hi/Me/Lo  
dB-A  
44 / 40 / 36  
44 / 40 / 36  
Refrigerant Tubing Connections  
Flare Type  
1/4 (6.35)  
Refrigerant  
Narrow tube  
Wide tube  
inch (mm)  
inch (mm)  
Tube Diameter  
1/2 (12.7)  
Wired Remote Controller (Option)  
CZ-RD515U  
Individual Unit  
Indoor Unit  
(CS-KE18NB4UW & CZ-18BT1U)  
Dimensions & Weight (Indoor Unit)  
Body  
Panel  
(CS-KE18NB4UW) (CZ-18BT1U)  
Unit Dimensions  
Height  
Width  
Depth  
inch (mm)  
12-5/16 (313)  
11-5/32 (283) 1-9/16 (40)  
inch (mm)  
inch (mm)  
inch (mm)  
24-19/32 (625)  
24-19/32 (625)  
-
22-5/8 (575) 24-19/32 (625)  
22-5/8 (575) 24-19/32 (625)  
11-13/32 (290) 4-1/8 (105)  
Package Dimensions Height  
Width  
Depth  
Net  
inch (mm)  
inch (mm)  
Ib. (kg)  
-
-
24-13/16 (630) 26-3/16 (665)  
28-1/8 (714) 26-11/16 (678)  
Weight  
41.3 (18.7)  
-
35.3 (16)  
41.9 (19)  
6.0 (2.7)  
7.7 (3.5)  
Shipping  
Ib. (kg)  
cu.ft (m3)  
-
4.59 (0.13)  
1.65 (0.04)  
Shipping Volume  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Remarks: Rating conditions are:  
Cooling: Indoor air temperature 80 °F DB / 67 °F WB  
Outdoor air temperature 95 °F DB / 75 °F WB  
Heating: Indoor air temperature 70 °F DB  
Outdoor air temperature 47 °F DB / 43 °F WB  
13  
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2-2. Major Component Specifications  
2-2-1. Indoor Unit  
Indoor Unit (Body) CS-MKE9NB4U  
Control PCB  
Part No.  
Controls  
CB-CS-MKE9NB4U  
Microprocessor  
250V 3A  
Control Circuit Fuse  
Fan  
Type  
Turbo  
Q'ty ... Dia. and Length  
inch (mm)  
1 ... D12-5/8 / L5-3/4 (D322/L147)  
Fan Motor  
Type  
DC Motor  
Model ... Q'ty  
SIC-62FW-D866-2 ... 1  
No. of Poles  
Rough Measure RPM (Cool / Heat)  
8
440 / 490  
DC280V / 23W  
-
Rating  
Coil Resistance  
Voltage / Nominal Output  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Internal Controller  
Over- Current Protection  
Over- Heat Protection  
Run Capacitor  
Yes  
Yes  
-
-
Micro F  
VAC  
Drain Pump  
Model ... Q'ty  
Rating  
PLD-12230ST-1 ... 1  
AC208 to 240V, 60Hz  
10.8  
Voltage, Hz  
Input  
W
Coil Resistance  
333 +/- 10%  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Open  
Thermal Fuse  
293 (145)  
°F (°C)  
Heat Exchanger Coil  
Coil  
Aluminum Plate Fin / Copper Tube  
Rows  
2
Fins per inch  
Face Area  
18.1  
2.94 (0.273)  
ft2 (m2)  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Indoor Unit (Panel) CZ-18BT1U  
Flap Motor  
Type  
Stepping Motor  
MP24ZN-12V ... 2  
Model ... Q'ty  
Rating  
DC 12V  
Coil Resistance  
(Ambient Temp. 77 °F (25 °C))  
Ohm  
Each Pair of Terminal : 380 +/- 7%  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
14  
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Indoor Unit (Body) CS-MKE12NB4U  
Control PCB  
Part No.  
Controls  
CB-CS-MKE12NB4U  
Microprocessor  
250V 3A  
Control Circuit Fuse  
Fan  
Type  
Turbo  
Q'ty ... Dia. and Length  
inch (mm)  
1 ... D12-5/8 / L5-3/4 (D322/L147)  
Fan Motor  
Type  
DC Motor  
Model ... Q'ty  
SIC-62FW-D866-2 ... 1  
No. of Poles  
Rough Measure RPM (Cool / Heat)  
8
470 / 520  
DC280V / 23W  
-
Rating  
Coil Resistance  
Voltage / Nominal Output  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Thermal Fuse  
Over- Current Protection  
Over- Heat Protection  
Run Capacitor  
Yes  
Yes  
-
-
Micro F  
VAC  
Drain Pump  
Model ... Q'ty  
Rating  
PLD-12230ST-1 ... 1  
AC208 to 240V, 60Hz  
10.8  
Voltage, Hz  
Input  
W
Coil Resistance  
333 +/- 10%  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Open  
Thermal Fuse  
293 (145)  
°F (°C)  
Heat Exchanger Coil  
Coil  
Aluminum Plate Fin / Copper Tube  
Rows  
2
Fins per inch  
Face Area  
18.1  
2.94 (0.273)  
ft2 (m2)  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Indoor Unit (Panel) CZ-18BT1U  
Flap Motor  
Type  
Stepping Motor  
MP24ZN-12V ... 2  
Model ... Q'ty  
Rating  
DC 12V  
Coil Resistance  
(Ambient Temp. 77 °F (25 °C))  
Ohm  
Each Pair of Terminal : 380 +/- 7%  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
15  
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Indoor Unit (Body) CS-KE18NB4UW  
Control PCB  
Part No.  
Controls  
CB-CS-KE18NB4U  
Microprocessor  
250V 3A  
Control Circuit Fuse  
Fan  
Type  
Turbo  
Q'ty ... Dia. and Length  
inch (mm)  
1 ... D12-5/8 / L5-3/4 (D322/L147)  
Fan Motor  
Type  
DC Motor  
Model ... Q'ty  
SIC-62FW-D866-2 ... 1  
No. of Poles  
Rough Measure RPM (Cool / Heat)  
8
650 / 720  
DC340V / 20W  
-
Rating  
Coil Resistance  
Voltage / Nominal Output  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Internal Controller  
Over- Current Protection  
Over- Heat Protection  
Run Capacitor  
Yes  
Yes  
-
-
Micro F  
VAC  
Drain Pump  
Model ... Q'ty  
Rating  
PLD-12230ST-1 ... 1  
AC208 to 240V, 60Hz  
10.8  
Voltage, Hz  
Input  
W
Coil Resistance  
333 +/- 10%  
Ohm  
(Ambient Temp. 68 °F (20 °C))  
Safety Device  
Type  
Open  
Thermal Fuse  
293 (145)  
°F (°C)  
Heat Exchanger Coil  
Coil  
Aluminum Plate Fin / Copper Tube  
Rows  
2
Fins per inch  
Face Area  
18.1  
2.94 (0.273)  
ft2 (m2)  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
Indoor Unit (Panel) CZ-18BT1U  
Flap Motor  
Type  
Stepping Motor  
MP24ZN-12V ... 2  
Model ... Q'ty  
Rating  
DC 12V  
Coil Resistance  
(Ambient Temp. 77 °F (25 °C))  
Ohm  
Each Pair of Terminal : 380 +/- 7%  
DATA SUBJECT TO CHANGE WITHOUT NOTICE.  
16  
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2-3. Other Component Specifications  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW & CZ-18BT1U  
• Indoor air temp sensor  
• Indoor heat exchanger sensor  
(Model:KTEC-35-S98)  
(Model:PT2M-51H-S3)  
10  
200  
180  
9
8
7
6
5
4
3
2
1
0
160  
140  
120  
100  
80  
60  
40  
20  
0
50  
59 68 77 86 95 104  
32 50 68 86 104 122 140 158 176 194  
(0) (10)(20) (30) (40)(50) (60) (70)(80) (90)  
(10) (15) (20) (25) (30) (35) (40)  
Temperature °F (°C)  
Temperature °F (°C)  
17  
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3. DIMENSIONAL DATA  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW & CZ-18BT1U  
1 - 3 / 1 6  
7 - 1 1 / 1 6  
2 1 / 3 2  
3 - 1 / 8  
C e i l i n g o p e n i n g d i m e n s i o n s  
2 3 - 5 / 8 ( 6 0 0 )  
S u s p e n s i o n b o l t p i t c h  
1 1 - 5 / 3 2 1 ( - 3 2 / 1 8 6 ( 3 3 0 ) )  
8 - 1 5 / 3 2  
2 4 - 1 9 / 3 2 ( 6 2 5 )  
1 3 - 5 / 3 2 ( 3 3 4 )  
2 1 - 1 / 3 2 ( 5 3 4 )  
1 2 - 7 / 1 6  
1 - 2 5 / 3 2  
4 - 1 9 / 3 2  
1 2 - 7 / 8  
1 - 2 5 / 3 2  
5 - 9 / 1 6  
- 9 1 / 3 2  
2 - 3 / 4  
3 - 5 / 8  
7 - 2 3 / 3 2  
Unit : inch (mm)  
18  
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4. REFRIGERANT FLOW DIAGRAM  
4-1. Refrigerant Flow Diagram  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
Indoor unit  
O.D. 3/8" (9.52 mm)  
O.D. 1/4" (6.35 mm)  
Cooling cycle  
Heating cycle  
Indoor Unit  
CS-KE18NB4UW & CZ-18BT1U  
Indoor unit  
O.D. 1/2" (12.7 mm)  
O.D. 1/4" (6.35 mm)  
Cooling cycle  
Heating cycle  
19  
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5. ELECTRICAL DATA  
5-1. Electric Wiring Diagrams  
Indoor Unit  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW & CZ-18BT1U  
C O I L - 1  
R O O M  
B L K  
B L K  
B L K  
B L K  
B L K  
B L K  
S T W I T C F H
O R G  
B L U  
B R N  
W H T  
B L K  
W H T  
B R N  
B L U  
O R G  
B L K  
W H T  
B R N  
B L U  
O R G  
B L K  
T
V L  
B L U  
P N K  
Y E L  
O R G  
R E D  
B R N  
G R N  
B L K  
W H T  
G R N / Y E L  
Y E L / ( R E D )  
Y E L / ( R E D )  
B L U  
Y E L  
W H T  
B L K  
R E D  
R E D  
W H T  
B L K  
C O R E  
F E R R I T E  
20  
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6. MAINTENANCE  
6-1. Disassembly Procedure  
To avoid electrical shock hazard, be sure to disconnect power before  
attempting to disassemble the unit.  
When a footstool, etc. is used for disassembling the indoor unit,  
be careful not to fall down. If you fall down, you might be injured seriously.  
Warning  
6-1-1. Remove the air intake grill.  
(1) Slide the 2 latches each to the corresponding arrow direction. (Fig. 1 and Fig. 2)  
Open downward the air intake grill located on the latch side.  
(2) Undo the air intake grill drop preventive hook. (Fig. 3)  
Undo the 2 hinges for the grill and remove the air intake grill.  
Latch  
Hinge  
Hook  
Latch  
Air intake grill  
Hinge  
Fig.1  
Fig.2  
Fig.3  
6-1-2. Disconnect the connectors in the control box.  
(1) Remove the 2 screws and remove the control box cover. (Fig. 4)  
(2) Disconnect the connectors CN04 (FLAP 5P), CN12 (RC 4P) and CN13 (IND 7P). (Fig. 5)  
CN04  
Control PCboard  
CN13  
CN12  
Screw  
Control box cover  
Fig.4  
Fig.5  
21  
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6-1-3. Remove the ceiling panel.  
(1) Open the clamp (4 locations) and remove the 2 lead wires from the clamps. (Fig. 6)  
(2) Remove the 4 screws fixing the corner cover (at 3 locations) and indicator cover (at 1 location). (Fig. 6)  
(3) Press the center 1 of the cover and remove the cover with the section 2 pulled down. (Fig. 7)  
(4) Remove the strap (3 locations) from the hook on the ceiling panel. (Fig. 8)  
NOTE  
There is no strap on the indicator cover.  
(5) Remove the bolt (4 locations) with a washer and remove the ceiling panel. (Fig. 9)  
Screw  
Clamp  
Corner cover  
Indicator  
cover  
Pull down  
section 2.  
Lead wire  
Cover  
Clamp  
Center 1  
Corner cover  
Corner cover  
Screw  
Fig.6  
Fig.7  
Bolt  
Strap  
Remove the strap  
from the hook.  
Bolt  
Fig.8  
Fig.9  
22  
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6-1-4. Remove the indoor air temperature sensor.  
(1) Disconnect the connector CN08 (ROOM 2P) in the control box and remove the indoor air temperature  
sensor. (Fig. 10)  
Indoor air temperature sensor  
CN08  
Fig.10  
6-1-5. Remove the power box and control box.  
(1) Remove a screw and remove the terminal cover. (Fig. 11)  
(2) Remove the 2 screws and remove the power box cover. (Fig. 11)  
(3) Disconnect the power lines (No. 1 and No. 2) / signal line (No. 3) and ground cable from the terminals in  
the power box. (Fig. 12)  
Terminal cover  
Screw  
Screw  
Power box cover  
Fig.11  
Terminal  
Ground cable  
Power lines / Signal line  
Fig.12  
23  
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(4) Disconnect the connector CN07 (DP 2P) in the power box. (Fig. 13)  
Remove a screw and disconnect the ground cable. (Fig. 13)  
(5) Disconnect the connector CN03 (DCM 6P) in the power box. (Fig. 14)  
(6) Remove the 4 screws and remove the power box. (Fig. 14)  
(7) Disconnect the connectors CN06 (FS 3P) and CN09 (COIL-1 2P) in the control box. (Fig. 15)  
(8) Remove the 2 screws and remove the control box. (Fig. 15)  
Screw  
Ground cable  
1
2
3
CN07  
Fig.13  
Screw  
Screw  
Screw  
Screw  
CN03  
Fig.14  
CN09  
Screw  
Screw  
CN06  
Fig.15  
24  
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NOTE  
For the removal of the following components, perform any work after removing the indoor  
unit (main body) from the ceiling.  
Main body lower section  
Float switch  
Heat exchanger sensor  
Turbo fan  
Drain pump  
Fan motor  
Heat exchanger  
1. Perform the work after draining the water to prevent the water leakage from the drain pan.  
• Put a bucket, etc., under the drain cap and remove the drain cap to drain the water.  
(Fig. 16)  
2. Refer to the installation instructions for recovery of refrigerant or removal of the power  
cable or tubing.  
6-1-6. Remove the main body lower section.  
(1) Remove the 4 screws. (Fig. 16)  
(2) Remove the 2 screws. (Fig. 17)  
(3) Disconnect the connector CN03 (DCM 6P) in the power box. (Fig. 18)  
(4) Lift the main body lower section and remove it from the main body upper section.  
Screw  
Screw  
Drain cap  
Main body lower section  
Main body lower section  
Screw  
Screw  
Fig.16  
Main body lower section  
Main body  
upper section  
Screw  
CN03  
Fig.17  
Fig.18  
25  
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6-1-7. Remove the heat exchanger sensor.  
(1) Remove the heat exchanger sensor from the sensor holder. (Fig. 19)  
Heat exchanger sensor  
Holder  
Fig.19  
6-1-8. Remove the drain pump and float switch.  
(1) Remove the 2 screws (Fig. 20)  
(2) Loosen the clamp and disconnect the drain hose from the drain pump. (Fig. 20)  
(3) Remove the drain pump from the main body upper section. (Fig. 20)  
(4) Remove a nut and remove the float switch. (Fig. 21)  
Screw  
Drain pump  
Float switch  
Nut  
Drain hose  
Clamp  
Fig.20  
Fig.21  
26  
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6-1-9. Remove the turbo fan and fan motor.  
(1) Remove a nut and remove the turbo fan. (Fig. 22)  
(2) Remove the 2 screws and 3 nuts, and remove the fan motor. (Fig. 23)  
Turbo fan  
Screw  
Nut  
Nut  
Fan motor  
Fig.22  
Fig.23  
6-1-10. Remove the heat exchanger.  
(1) Remove the 3 screws. (Fig. 24)  
(2) Remove the 3 screws. (Fig. 25)  
(3) Remove the heat exchanger from the main body upper section with the heat exchanger lifted.  
Heat exchanger  
Screw  
Screw  
Main body  
upper section  
Screw  
Fig.24  
Fig.25  
27  
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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)  
HEAT  
(RED)  
STOP  
(Lamp Off)  
B zone  
• The set temperature is 4°F(2°C) below the detected room  
temperature in the case of cooling operation, and 4°F(2°C)  
above the room temperature in the case of heating  
operation. The flap and fan speed settings are AUTO.  
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.  
AUTO cooling/heating operation  
Selecting the operation mode  
DRY B  
• When AUTO mode is selected, the microprocessor calculates  
the difference between the set temperature and the room  
temperature, and automatically switches to Cooling or  
Heating mode.  
The compressor operates at a low operating frequency.  
The indoor fan operates with 1/f fluctuation.  
Monitor  
Room temp. Set temp.  
Room temp. Set temp.  
COOL  
HEAT  
• Monitoring operation takes place when the room temperature  
is below 59°F(15°C), or more than 5°F(3°C) below the set  
• As shown by the example in the figure below, with AUTO  
cooling/heating operation, the mode changes between  
Heating and Cooling mode according to changes in the  
relationship between the current room temperature and the  
set temperature.  
temperature.  
• When the monitoring range is entered, the compressor stops,  
and the indoor fan operates with 1/f fluctuation.  
Example  
PAM- control  
Example of operation in AUTO mode with the set room temperature  
at 74°F(23°C).  
• 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.  
Room temp.  
Zone A  
Zone B  
Zone C  
74  
Set temp.  
Zone C  
Zone B  
More than  
1 hour  
Within  
1 hour  
Zone A  
Compressor  
ON  
ON  
ON  
OFF  
OFF  
Operation mode  
Cooling  
Heating  
Cooling  
28  
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HIGH POWER  
NIGHT SETBACK  
This function acts to raise the power but keeps the AC system in  
the same operating mode.  
This function is set with the HIGH POWER button on the remote  
controller.  
(It can be set regardless of the temperature and fan speed  
settings.)  
When NIGHT SETBACK operation is set, the temperature and  
fan speed settings will be adjusted automatically to allow  
comfortable sleep.  
When NIGHT SETBACK operation is set, " mark" appears on  
the remote controller. The main unit display lamp also becomes  
dimmer.  
HIGH POWER operation from remote controller  
COOL and DRY modes  
The unit operates at maximum output for 30 minutes,  
regardless of the desired temperature.  
The fan speed is 1 step above "High."  
When the night setback mode is selected, the air conditioner  
automatically raises the temperature setting 2°F(1°C) when 30  
minutes have passed after the selection was made, and then  
another 2°F(1°C) after another 30 minutes have passed,  
regardless of the indoor temperature when night setback was  
selected. This enables you to save energy without sacrificing  
comfort. This function is convenient when gentle cooling is  
needed.  
Frequency  
MAX  
2°F(1°C)  
Setting  
Time  
0
temperature  
2°F(1°C)  
30 min.  
5 min.  
Press the NIGHT  
SETBACK button  
30 min.  
30 min.  
Start  
End  
Time  
NOTE  
When HIGH POWER operation ends, the unit operates at low  
Hz for 5 minutes, regardless of the thermostat OFF conditions.  
HEAT mode  
When in DRY mode, operation is in the cooling zone.  
When the night setback mode is selected, the air conditioner  
automatically lowers the temperature setting 4°F(2°C) when 30  
minutes have passed after the selection was made, and then  
another 4°F(2°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 heating is  
needed.  
Lamp colors  
OPERATION lamp  
HEAT operation  
DRY operation  
Red  
Setting  
4°F(2°C)  
temperature  
Orange  
4°F(2°C)  
Time  
COOL operation  
FAN operation  
Green  
Green  
DEFROSTING operation  
Red and Orange  
alternately  
Press the NIGHT  
SETBACK button  
30 min.  
30 min.  
OPERATION lamp  
Green  
Green  
Green  
TIMER lamp  
HIGH POWER lamp  
Timer backup  
Operation stops if there are no operator controls for 25 hours or  
longer after unit operation switched from OFF to ON by use of  
ON timer operation.  
29  
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7-2. Protective Functions  
Overload prevention during heating  
Cold-air prevention during heating  
During HEAT operation, the temperature of the indoor heat  
exchanger is used to control the frequency and lessen the load  
on the compressor before the protective device is activated.  
During heating, the fan speed is set to "LL" (very low) or stopped.  
As the temperature of the indoor heat exchanger rises, the fan  
speed is changed to the set speed.  
Indoor heat exchanger  
Fan speed [rpm]  
Outdoor air temp.  
The fan speed is increased depending  
on the outside air temperature. (*1)  
Approx.  
A
127  
(53)  
A. Control start  
B. Control end  
Approx.  
117  
B
TO1  
TO2  
TO3  
H +  
(47)  
a
b
c
d
H
a. Area: Automatic capacity control  
b. When Point A has been exceeded, the operation frequency is  
reduced by a certain proportion.  
At stability of operation  
c. Area: Frequency increase is prohibited.  
d. At Point B and below, overload prevention is ended and  
control is the same as in the  
a
area.  
At start of operation  
LL  
Stopped  
Freeze prevention  
77  
86  
TC1  
100  
(38)  
(25) (30)  
During COOL or DRY operation, freezing is detected and  
operation is stopped when the temperature of the indoor heat  
exchanger matches the conditions below.  
Indoor heat exchanger  
temperature °F(°C)  
1. Freeze-prevention operation is engaged when the  
NOTE  
temperature of the indoor heat exchanger is below 43°F(6°C).  
• The fan speed is forcibly changed to "LL" beginning 30 seconds  
after the thermostat turns OFF.  
• At stability of operation refers to operation when the room  
temperature has approached the set temperature.  
2. Restart after freeze-prevention operation occurs when the  
temperature of the indoor heat exchanger reaches 46°F(8°C)  
or above.  
• When HEAT operation starts, the indoor fan is stopped until the  
temperature of the indoor heat exchanger reaches 68°F(20°C)  
or higher, or until the room temperature reaches 59°F(15°C) or  
higher.  
C
46  
(8)  
A
B
43  
(6)  
*1 It is applied only to CS-MKE9NB4U and CS-MKE12NB4U.  
This function is enabled when the automatic operation is being  
performed and the "Automatic Fan Speed" has been selected.  
The fan speed might be increased during the automatic  
operation. However, it is not the abnormal condition.  
36  
(2)  
*
a
b
c
d
TC1 : CS-KE18NB4UW  
CS-MKE9NB4U, CS-MKE12NB4U  
TO1 : 35.6°F (2°C) or less  
104°F (40°C)  
91°F (33°C)  
a. Area: Automatic capacity control  
b. When the temperature drops below Point A, the operation  
frequency is reduced by a certain proportion.  
TO2 : 35.6°F (2°C) to 53.6°F (12°C)  
TO3 : 53.6°F (12°C) or more  
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.  
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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  
< Clock display >  
Follow the procedure below to perform detailed trouble diagnostics.  
Test run mode  
Self-diagnostics mode  
NOTE  
1:If the operation lamp blinks every 0.5 seconds immediately when the  
power is turned ON, there is an external ROM (OTP data) failure on the  
indoor circuit board, or a ROM socket insertion problem, or the ROM  
has not been installed.  
2:The failure mode is stored in memory even when the power is not ON.  
Follow the procedure below to perform diagnostics.  
PROCEDURE  
ON/OFF  
operation  
button  
After turning on power to the air conditioner, use the remote controller and  
follow the steps below to execute self-diagnostics.  
Step 1: Press and hold the remote controller HIGH POWER button and 1  
HR TIMER button. Then, press and hold the ACL (reset) button  
with a pointed object such as the tip of a pen. After 5 seconds,  
release ACL button first, then release HIGH POWER and 1 HR  
TIMER buttons, "oP-1" (test run) appears, blinking in the remote  
controller clock display area.  
HIGH POWER  
button  
1HR.  
TIMER  
button  
Step 2: Next, press the 1 HR TIMER button once to change the display  
from "oP-1" to "oP-3" (self-diagnostics). (The display continues to  
blink.)  
Step 3: Finally press the ON/OFF button to engage self-diagnostics mode.  
• The self-diagnostics function utilizes the 3 indicator lamps on the main  
unit, in combinations of ON lamps, blinking lamps, and OFF lamps, to  
report the existence of sensor trouble or a protective operation. (The  
lamps blink or remain ON for 5 seconds, then turn OFF for 2 seconds.)  
Self-diagnostics is completed when the buzzer sounds 3 short beeps.  
• A maximum of 3 self-diagnostics reports are displayed, for 5 seconds  
each, beginning with the most recent report. Following this display the  
lamps turn OFF. In order to view the self-diagnostics results again,  
press the ON/OFF button again.  
ACL  
(Reset)  
button  
• The 3 lamps remain OFF if no trouble has occurred.  
<IMPORTANT> After self-diagnostics is completed, be sure to press the  
ACL (reset) button to return to normal mode. The air  
conditioner will not operate if this is not done.  
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(1) Self-diagnostics Lamps  
INDOOR UNIT  
OPERATION button  
OPERATION lamp  
TIMER lamp  
HIGH POWER lamp  
REMOTE CONTROL receiver  
Since the indications cover various units, the corresponding parts listed below may not be present in some models.  
.... .... ....  
INDICATION ON INDOOR UNIT  
OFF  
BLINKING  
ON  
HIGH  
OPERATION  
TIMER  
POWER  
CODE  
S01  
DIAGNOSIS CONTENTS  
POSSIBLE MALFUNCTION  
(1) OPEN OR SHORT CIRCUIT IN SENSOR  
(2) POOR CONTACT AT CONNECTOR OR OPEN  
CIRCUIT AT TERMINAL PRESS-FIT LOCATION.  
(3) I/D PCB FAILURE (I/D = INDOOR)  
ROOM TEMP. SENSOR TROUBLE  
I/D HEAT EXCHANGER TEMP.  
SENSOR TROUBLE  
S02  
(1) OPEN OR SHORT CIRCUIT IN SENSOR  
(2) POOR CONTACT AT CONNECTOR OR OPEN  
CIRCUIT AT TERMINAL PRESS-FIT LOCATION  
(3) O/D PCB FAILURE (O/D = OUTDOOR)  
COMPRESSOR TEMP. SENSOR  
TROUBLE  
S04  
S05  
O/D HEAT EXCHANGER TEMP.  
SENSOR TROUBLE  
O/D AIR TEMP. SENSOR TROUBLE  
O/D CURRENT SENSOR ERROR  
S06  
S07  
O/D PCB FAILURE  
(1) MIS-WIRING (2) AC POWER FAILURE (3) BLOWN FUSE  
(4) POWER RELAY FAILURE (5) I/D OR O/D PCB FAILURE  
(6) O/D FAN MOTOR FAILURE (7) REACTOR FAILURE  
I/D-O/D COMMUNICATION  
TROUBLE  
E01  
E02  
(SERIAL COMMUNICATION  
TROUBLE)  
(8) HIGH-PRESSURE SW FAILURE (9) OLR FAILURE (10) MAGNETIC COIL FAILURE  
(1) HIC OR POWER TR FAILURE (2) O/D FAN NOT OPERATING  
(3) INSTANTANEOUS POWER STOPPAGE (4) SERVICE VALVE NOT OPENED  
(5) O/D FAN BLOCKED (6) CONTINUOUS OVERLOAD OPERATION  
(7) COMPRESSOR FAILURE (8) O/D PCB FAILURE  
HIC CIRCUIT TROUBLE  
POWER TR CIRCUIT TROUBLE  
O/D UNIT EXTERNAL ROM  
TROUBLE  
(1) EXTERNAL ROM DATA FAILURE (2) O/D PCB FAILURE  
E03  
E04  
(1) INSTANTANEOUS POWER STOPPAGE (2) HIC OR POWER TR FAILURE  
(3) O/D PCB FAILURE  
CURRENT PEAK CUT  
PAM CIRCUIT TROUBLE  
(1) O/D PCB FAILURE  
(2) O/D POWER VOLTAGE TROUBLE  
E05  
E06  
E07  
E08  
ACTIVE CIRCUIT TROUBLE  
(1) ELECTRIC EXPANSION VALVE FAILURE (2) CHOKED CAPILLARY TUBE  
(3) INSUFFICIENT GAS (4) CONTINUOUS OVERLOAD OPERATION  
(5) O/D FAN NOT OPERATING (6) O/D PCB FAILURE  
COMPRESSOR  
DISCHARGE TEMP.  
OVERHEATING PREVENTION  
(1) FAN MOTOR FAILURE (2) CONNECTOR CONTACT FAILURE  
(3) I/D PCB FAILURE  
I/D FAN OPERATION TROUBLE  
4-WAY VALVE SWITCHING  
TROUBLE  
ZERO-CROSS TROUBLE  
(1) 4-WAY VALVE FAILURE (HEAT PUMP MODEL ONLY)  
(2) O/D PCB FAILURE  
(1) SERVICE VALVE NOT OPENED (2) INSUFFICIENT GAS  
(1) OPEN PHASE (2) O/D PCB FAILURE  
GAS-LOSS PREVENTION  
E09  
E10  
DC COMPRESSOR DRIVE  
CIRCUIT TROUBLE  
(1) FAN MOTOR FAILURE (2) CONNECTOR CONTACT FAILURE  
(3) O/D PCB FAILURE  
E11  
E12  
O/D DC FAN OPERATION TROUBLE  
(1) MIS-WIRING (2) BLOWN FUSE  
(3) POWER RELAY FAILURE (4) O/D PCB FAILURE  
(5) COMPRESSOR FAILURE  
O/D SYSTEM COMM FAILURE,  
OLR OPERATION, O/D POWER  
OPEN PHASE, O/D FREEZING  
(1) I/D FAN SYSTEM TROUBLE (2) INSUFFICIENT GAS  
(3) OPERATION AT LOW TEMPERATURE  
FREEZING-PREVENTION OPERATION  
FLOAT SWICTH (FS) IS ACTIVED.  
E13  
TIMER  
LAMP  
BLINKING (3 SEC. INTERVAL)  
(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE  
8512-5261-99100-1  
32  
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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.  
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 3 indicator  
lamps on the unit. If all 3 are blinking,  
the current mode is "TEST run."  
•
Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the  
voltage at both ends is measured, approximately 12 to 15V DC must  
be output and the multimeter pointer must bounce once every 8  
seconds.  
Or instead of measuring the voltage, you can insert an LED jig and  
check that the LED flickers once every 8 seconds.  
If there are no problems with the above, then check the outdoor unit.  
For the "Test run" procedure, refer to the Appendix B "Installation Instructions".  
(2) Checking the outdoor unit  
No.  
Control  
Check items (unit operation)  
1
Apply the rated voltage between outdoor  
unit terminals L and N.  
• The control panel LED (red) must illuminate.  
2
Short-circuit the outdoor unit COM terminal  
to the T-RUN terminal.  
• The compressor, fan motor and 4-way valve must all turn on.  
If there are no problems with the above, then check the indoor unit.  
TEST/T-RUN terminals  
Using the TEST/T-RUN terminals  
T-RUN  
: Test run (compressor and fan motor turn ON).  
TEST/MV : Compresses time to 1/60th (accelerates  
operation by 60 times faster than normal).  
(TEST)/MV T-RUN COM  
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(3) Serial Communication Error Identification Procedure  
If the lamps on the main body show the following conditions after the completion of self-diagnostics,  
a communication error between the indoor unit and outdoor unit might be considered.  
In such a case, identify the breakdown section by using the following procedure.  
NOTE Refer to "Method of Self-Diagnostics" for the self-diagnostics procedure.  
Lamp Operation  
Timer  
High Power  
: Off  
: Blinking  
: Illuminated  
Condition  
E01  
E12  
< Before the Operation >  
For terminal strip short circuit work or inter-unit wiring removal, turn off the power  
Warning to avoid an electric shock.  
Release the terminal strip short circuit after the completion of self-diagnostics.  
Do not perform the short-circuit work between any other terminals except for  
Caution specified ones on the specified terminal strip. If such work is performed between  
the incorrect terminals, the unit might be broken.  
Prohibit  
< Convenient Tool for Short-Circuit Work ( for example ) >  
Cable  
Alligator Clip  
Alligator Clip  
< Check Items before Troubleshooting Serial Communication Start >  
After confirming that the following errors do not exist, start the "Troubleshooting Serial Communication"  
in "Condition: E01 and E12".  
1. Mis -wiring (inter-unit cable, etc.)  
2. AC power failure  
3. Blown fuse  
6. Reactor failure (defective insulation, etc.)  
7. High-Pressure Switch failure  
8. Overload Relay failure  
4. Power Relay failure  
5. Outdoor Fan Motor failure (defective insulation, etc.)  
9. Magnetic Coil failure (defective insulation, short-circuit, etc.)  
10. Compressor failure (defective insulation, etc.)  
(3-1) Condition: E01  
-
+
Outdoor Unit  
V
1
2
3
3
4
5
6
Outdoor Unit  
Troubleshooting Serial Communication  
1
1
2
3
4
5
6
Power  
1
2
Power  
Indoor Unit  
2
3
V
Indoor Unit  
+
-
Fig. 2  
Fig. 1  
1. Turn OFF the power and wait until the power lamp (LED)  
of the outdoor unit controller is turned OFF.  
2. Disconnect the cable from the terminal 3 on the indoor unit  
Is the voltage of about DC12V  
or more given between the terminals  
2 and 3 on the outdoor unit terminal strip  
(Serial Communication Line) ?  
(Fig. 1)  
No  
terminal strip.  
(Fig. 2)  
3. Turn ON the power.  
Yes  
A
B
( Continued to the next page B. )  
( Continued to the next page A. )  
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( Continued from the previous page A. )  
A
( Continued from the previous page B. )  
B
Is the voltage of about DC22V to  
24V given between the terminals  
2 and 3 on the indoor unit terminal strip  
(Serial Communication Line) ?  
(Fig. 2)  
Yes  
No  
Defect in the indoor unit  
P.C. board  
Defect or connection error  
in the inter-unit cable  
Outdoor Unit  
1. Turn OFF the power and wait until the power lamp (LED)  
of the outdoor unit controller is turned OFF.  
2. Short-circuit between the terminals 2 and 3 on the outdoor  
1
1
2
2
3
3
4
5
6
Power  
unit terminal strip.  
(Fig. 3)  
Indoor Unit  
Fig. 3  
1. Turn ON the power and operate the system using the  
remote controller or the operation button on the indoor unit.  
2. Perform the self-diagnosis five seconds after the operation  
start.  
Condition: E12  
Defect in the outdoor unit  
P.C. board.  
What is the latest self-diagnosis result ?  
Condition: E01  
Outdoor Unit  
Outdoor Unit  
1. Turn off the power and wait until the power lamp (LED)  
of the outdoor unit controller is turned OFF.  
2. Remove the short-circuit between the terminals 2 and 3 on  
the outdoor unit terminal strip.  
1
1
2
3
3
4
5
6
1
2
2
3
4
5
6
Power  
Power  
3. Disconnect the cable from the terminal 3 on the indoor unit  
2
terminal strip.  
(Fig. 4)  
1
3
Indoor Unit  
Fig. 4  
Indoor Unit  
Fig. 5  
Short-circuit between the terminals 2 and 3 on the indoor unit  
terminal board. (Fig. 5)  
1. Turn ON the power and operate the system using the  
remote controller or the operation button on the indoor unit.  
2. Perform the self-diagnosis five seconds after the operation  
start.  
Condition: E12  
Defect or connection error  
in the inter-unit cable  
What is the latest self-diagnosis result ?  
Condition: E01  
Defect in the indoor unit  
P.C. board  
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(3-2) Condition: E12  
Troubleshooting Serial Communication  
Outdoor Unit  
1
1
2
2
3
3
4
5
6
Power  
1. Turn off the power and wait until the power lamp (LED)  
of the outdoor unit controller is turned OFF.  
2. Disconnect the cable from the terminal 3 on the Outdoor  
Indoor Unit  
unit terminal strip.  
(Fig. 6)  
Fig. 6  
1. Turn ON the power and operate the system using the  
remote controller or the operation button on the indoor unit.  
2. Perform the self-diagnosis five seconds after the operation  
start.  
Condition: E01  
Defect in the outdoor unit  
P.C. board  
What is the latest self-diagnosis result ?  
Condition: E12  
Outdoor Unit  
1
1
2
3
3
4
5
6
1. Turn off the power and wait until the power lamp (LED)  
of the outdoor unit controller is turned OFF.  
2. Disconnect the cable from the terminal 3 on the indoor  
Power  
2
unit terminal strip.  
(Fig. 7)  
Indoor Unit  
Fig. 7  
1. Turn ON the power and operate the system using the  
remote controller or the operation button on the indoor unit.  
2. Perform the self-diagnosis five seconds after the operation  
start.  
Condition: E01  
Defect in the inter-unit  
cable  
What is the latest self-diagnosis result ?  
Condition: E12  
Defect in the indoor unit  
P.C. board  
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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.  
Important:  
(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.  
[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 280V to 340V  
(1) Vm-Gnd: Between pin 1 and pin 3  
(2) Vcc-Gnd: Between pin 4 and pin 3  
(3) Vs-Gnd: Between pin 5 and pin 3  
DC 15V +/- 10%  
Fluctuation between DC 1.8V to 5.7V  
(Diagnostic results)  
All of the above measured values are normal. Fan motor trouble (Replace the motor.)  
Any one of the above measured values is not normal. Indoor unit controller trouble (Replace the controller .)  
(Reference)  
DC motor connector pin arrangement  
Pin 1: Vm (red)  
Pin 2: Not used  
Pin 3: Gnd (black)  
Pin 4: Vcc (white)  
Pin 5: Vs (yellow)  
Pin 6: PG (blue)  
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the indoor  
unit operates.  
(There is trouble in the system that provides feedback of motor rotation speed from the  
motor to the indoor unit controller.)  
[Trouble symptom 4] Fan motor rotation speed does not change during indoor unit operation.  
[Trouble symptom 5] Fan motor rotation speed varies excessively during indoor unit operation.  
(Remedy for symptom 3 to 5)  
It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble.  
Therefore, first replace the indoor unit controller, then (if necessary) replace the DC motor.  
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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  
1. Locations near broadcast stations where  
there are strong electromagnetic waves  
Either of the following trouble may occur.  
(The fundamental concept is to make the  
system less susceptible to noise.)  
1. The unit may stop suddenly during  
operation.  
2. Locations near amateur radio (short wave)  
stations  
- Insulate for noise or  
distance from the noise source. -  
2. Indicator lamps may flicker.  
3. Locations near electronic sewing machines  
and arc-welding machines  
1. Use shielded wires.  
2. Move unit away from the noise source.  
(2) Electromagnetic interference  
This refers to noise generated by high-speed switching of the microcomputer and compressor. This noise radiates through  
space and returns to the electric wiring, affecting any wireless devices (televisions, radios, etc.) located nearby.  
Locations most susceptible to noise  
Trouble  
Correction  
1. A television or radio is located near the  
A/C and A/C wiring.  
1. Noise appears in the television picture, 1. Select a separate power source.  
or the picture is distorted.  
2. Keep the A/C and A/C wiring at least 1 meter  
2. The antenna cable for a television or  
radio is located close to the A/C and A/C  
wiring.  
2. Static occurs in the radio sound.  
away from wireless devices and antenna cables.  
3. Change the wireless device’s antenna to a high-  
sensitivity antenna.  
3. Locations where television and radio  
signals are weak.  
4. Change the antenna cable to a BS coaxial cable.  
5. Use a noise filter (for the wireless device).  
6. Use a signal booster.  
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APPENDIX A Operating Instructions  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
(852-6-4181-219-00-2)  
A-1  
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Operating Instructions  
Split System Air Conditioner  
Model No.  
Indoor Units  
Outdoor Units  
CS-MKE9NB4U  
CS-MKE12NB4U  
CU-3KE19NBU  
CU-4KE24NBU  
CU-4KE31NBU  
Ceiling Panel  
CZ-18BT1U  
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  
85264181219002  
CV6233187594  
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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  
This function moves a flap up and down in the air outlet,  
The interior compartment of the remote controller contains  
several features to facilitate automatic operation, easy  
logically displayed for easy use.  
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  
• Hot Start Heating System  
This timer can be set to automatically turn the unit on or off  
at any time within a 24 hour period.  
Right from the start, the air is warm and comfortable. This  
system prevents any cold blasts at the beginning while the  
heat pump is warming up, or even defrosting.  
• 1-Hour OFF Timer  
This timer can be set to automatically turn off the unit at  
any time after one hour.  
• Automatic Restart Function for Power Failure  
Even when power failure occurs, preset programmed  
operation can be reactivated once power resumes.  
• Night Setback  
This function saves energy by controlling operation to  
• High Power Operation  
provide a quieter operating sound than normal.  
If not in Auto Operation, the unit operates at maximum  
output for 30 minutes, regardless of the desired  
temperature.  
• Automatic and 3-step Fan Speed  
Auto/High/Medium/Low  
The fan speed is 1 step above “High”.  
CONTENTS  
Page  
FEATURES................................................................................. 2  
PRODUCT INFORMATION........................................................ 2  
SAFETY PRECAUTIONS........................................................... 2  
INSTALLATION LOCATION........................................................ 3  
ELECTRICAL REQUIREMENTS ............................................... 3  
SAFETY INSTRUCTIONS.......................................................... 3  
NAMES OF PARTS .................................................................... 4  
USING THE REMOTE CONTROLLER ...................................... 8  
OPERATION WITH THE REMOTE CONTROLLER................... 9  
1. Automatic Operation..................................................... 9  
2. Manual Operation......................................................... 9  
3. Adjusting the Fan Speed............................................ 10  
4. Night Setback Mode................................................... 10  
5. HIGH POWER Mode.................................................. 10  
Page  
SPECIAL REMARKS ................................................................11  
SETTING THE TIMER ..............................................................11  
USING THE 1-HOUR OFF TIMER ...........................................13  
TIPS FOR ENERGY SAVING...................................................13  
ADJUSTING THE AIRFLOW DIRECTION ...............................13  
OPERATION WITHOUT THE REMOTE CONTROLLER..........14  
CARE AND CLEANING ............................................................14  
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) ..16  
OPERATING RANGE................................................................16  
WIRED REMOTE CONTROLLER ............................................16  
SPECIFICATIONS.....................................................................17  
PRODUCT INFORMATION  
SAFETY PRECAUTIONS  
If you have problems or questions concerning your Air  
Conditioner, you will need the following information. Model  
and serial numbers are on the nameplate on the bottom of  
the cabinet.  
The following symbols used in this manual, alert you  
to potentially dangerous conditions to users, service  
personnel or the appliance:  
This symbol refers to a hazard or unsafe  
practice which can result in severe  
personal injury or death.  
Model No. __________________________________  
Serial No. ___________________________________  
Date of purchase _____________________________  
Dealer’s address _____________________________  
Phone number _______________________________  
This symbol refers to a hazard or unsafe  
practice which can result in personal  
CAUTION  
injury or product or property damage.  
2
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INSTALLATION LOCATION  
• To prevent possible hazards from insulation failure,  
the unit must be grounded.  
• We recommend that this air conditioner be installed  
properly by qualified installation technicians in  
accordance with the Installation Instructions  
provided with the unit.  
• Before installation, check that the voltage of the electric  
supply in your home or office is the same as the voltage  
shown on the nameplate.  
• Do not clean inside the indoor and outdoor units by users.  
Engage authorized dealer or specialist for cleaning.  
• In case of malfunction of this appliance, do not repair by  
yourself. Contact to the sales dealer or service dealer for a  
repair.  
• Refrigerant gas leakage may cause fire.  
• For safety, be sure to turn the air conditioner off and  
also to disconnect the power before cleaning.  
• Pull off the power plug from a receptacle, or switch off the  
breaker, or switch off the power disconnecting mean to  
isolate the air conditioner from the main power supply in  
case of emergency.  
• Do not install this air conditioner  
where there are fumes or flammable  
gases, or in an extremely humid space  
such as a greenhouse.  
• Do not install the air conditioner where  
excessively high heat-generating  
objects are placed.  
CAUTION  
Avoid:  
• Do not turn the air conditioner on and off from the power  
mains switch. Use the ON/OFF operation button.  
• Do not stick anything into the air outlet of the outdoor unit.  
This is dangerous because the fan is rotating at high  
speed.  
• Do not touch the air inlet or the sharp aluminum fins  
of the outdoor unit. You may get injured.  
• Keep the fire alarm and the air outlet at least 1.5m away from  
the unit.  
To protect the air conditioner from heavy corrosion, avoid installing  
the outdoor unit where salty sea water can splash directly onto it or  
in sulphurous air near a spa.  
ELECTRICAL REQUIREMENTS  
1. All wiring must conform to the local electrical codes.  
Consult your dealer or a qualified electrician for details.  
2. Each unit must be properly grounded with a ground (or  
earth) wire or through the supply wiring.  
• Do not let children play with the air conditioner.  
• Do not cool or heat the room too much if babies or invalids  
are present.  
3. Wiring must be done by a qualified electrician.  
• Do not sit or step on the unit. You may fall down  
accidentally.  
• Do not stick any object into the FAN CASE.  
You may be injured and the unit may be damaged.  
NOTE  
Pull off the power plug from a receptacle, or switch off the breaker, or  
switch off the power disconnecting mean to isolate the air conditioner  
from the main power supply when not in use for a long time.  
SAFETY INSTRUCTIONS  
NOTICE  
• Read this Instruction Manual carefully before using  
this air conditioner. If you still have any difficulties  
or problems, consult your dealer for help.  
• This air conditioner is designed to give you  
comfortable room conditions. Use this only for its  
intended purpose as described in this Instruction  
Manual.  
• This device complies with part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
(1) This device may not cause harmful interference, and (2) this  
device must accept any interference received, including  
interference that may cause undesired operation.  
• This equipment has been tested and found to comply with  
the limits for a Class B digital device, pursuant to part 15 of  
the FCC Rules.  
These limits are designed to provide reasonable protection  
against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency  
energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that  
interference will not occur in a particular installation. If this  
equipment does cause harmful interference to radio or television  
reception, which can be determined by turning the equipment off  
and on, the user is encouraged to try to correct the interference  
by one or more of the following measures:  
• Confirm to authorized dealer or specialist on usage of  
specified refrigerant type.  
Using of refrigerant other than the specified type may cause  
product damage, burst and injury etc.  
• Never touch the unit with wet hands.  
• Never use or store gasoline or other flammable vapor or  
liquid near the air conditioner — it is very dangerous.  
• Do not use this appliance in a potentially explosive  
atmosphere.  
• This air conditioner has no ventilator for intaking fresh air  
from outdoors. You must open doors or windows frequently  
when you use gas or oil heating appliances in the same  
room, which consume a lot of oxygen from the air.  
Otherwise there is a risk of suffocation in an extreme case.  
• Do not swallow the battery.  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from  
that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for  
help.  
• After removing the battery from remote controller, keep it  
away from the reach of children. The battery can cause  
death by suffocation if swallowed.  
• When inserting the battery, make sure the polarities  
(+ and -) are correct.  
• FCC Caution: To assure continued compliance, follow the  
attached installation instructions. Any changes or modifications  
not expressly approved by the party responsible for compliance  
could void the user's authority to operate this equipment.  
3
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NAMES OF PARTS  
UNIT DISPLAY AND OPERATION  
BUTTON  
INDOOR UNIT  
INDOOR UNIT  
Air Intakes  
OPERATION button  
OPERATION lamp  
Air Outlet!  
(4 locations)  
TIMER lamp  
HIGH POWER lamp  
REMOTE CONTROL receiver  
Remote Controller  
IMPORTANT  
Refrigerant Tubes  
OUTDOOR UNIT  
Avoid using radio equipment such as mobile phone near (within  
4 ft. (1.2 m)) the remote control receiver. Some radio equipment  
may cause malfunction of the unit.  
Drain Hose  
If the trouble happens, disconnect power and restart the air  
conditioner after a few minutes.  
REMOTE  
CONTROL  
receiver  
This section picks up infrared signals from the  
remote controller (transmitter).  
OPERATION  
button  
When the remote controller cannot be used,  
pressing this button enables heating and  
cooling operation.  
Air Outlet  
Each time this button is pressed, the type of  
operation conducted is indicated by the  
changing color of the OPERATION lamp. Press  
the button and select the lamp color that suits  
your preference for operation.  
NOTE  
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.  
Heating  
operation  
(red)  
Cooling  
operation  
(green)  
Stop  
(lamp off)  
This air conditioner consists of an indoor unit and an outdoor unit.  
You can control the air conditioner with the remote controller.  
Air from the room is drawn into this section and  
passes through air filters which remove dust.  
Air Intake  
OPERATION  
lamp  
This lamp lights when the system is in the  
continuous AUTO (red or green), HEAT (red),  
DRY (orange) and COOL (green) mode.  
The OPERATION lamp lights up red and orange  
alternately when the system is defrosting.  
Conditioned air is blown out of the air  
conditioner through the air outlet.  
Air Outlet  
The remote controller controls power ON/OFF,  
operation mode selection, temperature, fan  
speed, timer setting, and air sweeping.  
Remote  
Controller  
TIMER lamp  
This lamp lights when the system is being  
controlled by the timer.  
The indoor and outdoor units are connected by  
copper tubes through which refrigerant gas  
flows.  
Refrigerant  
Tubes  
HIGH POWER  
lamp  
This lamp lights during operation in the HIGH  
POWER mode.  
Moisture in the room condenses and drains off  
through this hose.  
Drain Hose  
NOTE  
The unit’s display lamps are dimmed during operation in the NIGHT  
SETBACK mode.  
The outdoor unit contains the compressor, fan  
motor, heat exchanger coil, and other electrical  
components.  
Outdoor  
(Condensing)  
Unit  
4
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REMOTE CONTROLLER (DISPLAY)  
Displayed when transmitting data  
Displayed when indoor unit sensor is  
in use  
Displayed when setting temperature  
Displayed when temperature is shown  
Displayed when setting timer  
Displayed when the time  
display is set to 12-hour  
time.  
Symbols  
(4) Timer  
24-hour clock with ON/OFF  
(1) Operation mode  
AUTO .....................................  
HEAT......................................  
MILD DRY ..............................  
COOL.....................................  
program Timer .......................  
ON Timer. ..............................  
OFF Timer. ............................  
1-hour OFF Timer..................  
(2) Fan speed  
(5) NIGHT SETBACK..................  
Automatic operation ...............  
(6) Confirmation  
of transmission.......................  
HIGH .....................................  
MEDIUM.................................  
LOW.......................................  
(7) Auto. flap indication................  
Flap angle indication..............  
Sweep indication....................  
(8) High power operation.............  
(3) Temperature setting  
60 – 86 °F  
When set to 80 °F  
temperature indication............  
5
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REMOTE CONTROLLER  
Transmitter  
When you press the buttons on the remote controller, the  
mark  
appears in the display to transmit the setting changes to the receiver  
in the air conditioner.  
Display  
Information on the operating conditions is displayed while the remote  
controller is switched on. If the unit is turned off, FLAP setting and  
FAN SPEED setting are not displayed.  
HIGH POWER button  
: If this button is pressed during HEAT, DRY or COOL operation, the  
unit operates at maximum output for 30 minutes, regardless of the  
desired temperature.  
The fan speed is 1step above ‘‘HIGH’’.  
FAN SPEED selector button  
: The air conditioner automatically decides the fan speeds.  
: High fan speed  
: Medium fan speed  
: Low fan speed  
FLAP button  
Press this button either to select the setting of the airflow direction to the auto.  
flap in each mode or one of the six possible positions manually or to select the  
sweep function which moves the flap up and down automatically.  
: Auto flap setting: If selected in a heating operation, the flap is set to  
position (3) in the following chart. If selected in a cooling or dry  
operation, the flap is set at position (7) in the following chart.  
: The airflow direction can be set manually. (six positions)  
: The flap moves up and down automatically.  
NOTE  
When you press the FLAP button, the air flow direction will be changed one by  
one as follows.  
SWEEP  
ON TIME/OFF TIME setting buttons  
Advance button  
Return button  
No display: The timer does not operate.  
: The air conditioner starts at the set time.  
: The air conditioner stops at the set time.  
: The air conditioner stops and starts, or starts and  
stops, at the set times every day. For details, see  
“SETTING THE TIMER”.  
CANCEL button  
SENSOR button  
When you press this button (use a small-tipped object such as a ballpoint  
pen), the  
mark will appear at the display. And the room temperature is  
detected by the sensor which is built into the indoor unit and the air  
conditioner is controlled accordingly.  
NOTE  
If the remote controller is located near a heat source, such as a space  
heater or in direct sunlight, press the SENSOR button to switch to the  
sensor on the indoor unit.  
ADDRESS switch  
• The address switch changes to prevent mixing of signals from remote controller’s when  
two air conditioners are installed next to each other. Normally, the address switch is set  
to A. For more information, please contact the dealer where you made the purchase.  
• Normally, the tabs on the remote controller should not be bent.  
Temperature display selector button  
This switches the temperature display  
between °C and °F.  
6
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Sensor  
A temperature sensor inside the remote controller senses the room  
temperature.  
ON/OFF operation button  
This button is for turning the air conditioner on and off.  
1 HR. TIMER button (1-HOUR OFF TIMER)  
: When you press this button, regardless of whether the unit is operating  
or stopping, the unit operates for one hour and then shuts down.  
Temperature setting buttons (TEMP.)  
Press the  
button to increase the set temperature.  
Press the  
button to reduce the set temperature.  
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.  
buttons is pressed.  
MODE selector button  
Use this button to select AUTO, HEAT, DRY or COOL mode.  
(AUTO)  
: When this setting is selected, the air conditioner calculates the  
difference between the thermostat setting and the room  
temperature and automatically switches to the ''COOL'' or  
''HEAT'' mode as appropriate.  
(HEAT)  
(DRY)  
: The air conditioner makes the room warmer.  
: The air conditioner reduces the humidity in the room.  
: The air conditioner makes the room cooler.  
(COOL)  
NIGHT SETBACK button  
For details, see “4. Night Setback Mode”. When you press this button in the  
HEAT, DRY or COOL mode, the  
mark appears in the display, and the  
remote controller will automatically adjust the set temperature to save energy.  
CLOCK button  
Time display selector button  
This switches the time display between 24-hour time and 12-hour time.  
ACL button (ALL CLEAR)  
Puts the remote controller into pre-operation status. Always press this button  
after replacing the batteries.  
(Cover closed)  
NOTE  
• The illustration above pictures the remote controller after the cover has been opened.  
• The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the  
remote controller stops for more than 15 minutes due to the loss of the remote controller or other trouble, the air conditioner will  
switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the  
temperature around the remote controller may differ from the temperature detected at the air conditioner’s position.  
• The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is  
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.  
7
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USING THE REMOTE CONTROLLER  
HOW TO INSTALL BATTERIES  
HOW TO USE THE REMOTE CONTROLLER  
When using the remote controller, always point the unit’s transmitter  
head directly at the air conditioner’s receiver.  
Air Conditioner  
(Indoor unit)  
Receiver  
ACL button  
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.  
(Transmitter  
head)  
Remote Controller  
REMOTE CONTROLLER INSTALLATION  
POSITION  
• The batteries last about six months,  
depending on how much you use the  
CAUTION  
The remote controller may be operated either from a non-fixed  
position or from a wall-mounted position. To ensure that the air  
conditioner operates correctly, do not install the remote controller in  
the following places:  
remote controller. Replace the  
batteries when the remote controller’s  
display fails to light, or when the  
remote controller cannot be used to  
change the air conditioner’s settings.  
• Use two fresh leak-proof type-AAA  
alkaline batteries.  
• In replacing batteries, follow the  
instructions as mentioned in the  
subsection “HOW TO INSTALL  
BATTERIES”.  
• 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)  
• If you do not use the remote controller  
more than 1 month, take out the  
batteries.  
• Dispose of the used batteries at the  
designated location in compliance  
with the applicable local ordinances.  
MOUNTING THE REMOTE CONTROLLER  
Before mounting the remote controller, press the ON/OFF operation  
button at the mounting location to make sure that the air conditioner  
operates from that location. The indoor unit should make a beeping  
sound to indicate that it has received the signal.  
Information for Users on Collection and Disposal  
of Old Equipment and used Batteries  
Rear Side  
[Information on Disposal in other Countries  
outside the European Union]  
Remote Control Holder  
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.  
Press  
Set in  
Note for the battery symbol (bottom two symbol  
examples):  
Hole  
place  
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.  
Mounting Screws  
5/32 x 5/8"  
• 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.  
(4 x 16 mm)  
(included)  
Pb  
S/M (Single/Multiple switch)  
To take out the remote controller, pull it forward.  
• Initially, the S/M switch is set to S (Single).  
• Set this switch to M (Multiple) for multiple operation.  
• Always press ACL button by a thin object such as the tip of a pen  
after setting the S/M switch.  
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.  
NOTE  
When multiple indoor units are used and units in other rooms are  
already operating, they will be operating with the same mode as the  
operating indoor units.  
8
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OPERATION WITH THE REMOTE CONTROLLER  
1. Automatic Operation  
2. Manual Operation  
The air conditioner calculates the difference between the thermostat  
setting and room temperature, and automatically determines the  
mode to operate under cooling or heating. Then, the air conditioner  
continuously operates under the mode selected at initial operation.  
STEP 2  
STEP 3  
STEP 2  
STEP 1  
STEP 4  
STEP 5  
STEP 1  
Check that the circuit breaker on the power panel is  
turned on.  
NOTE  
If the automatic operation settings of the unit do not  
meet your needs, press the setting buttons as  
described below and change the settings as desired.  
STEP 1  
Press the MODE selector button  
and select the desired mode.  
For heating operation  
Check that the circuit breaker on the power panel is  
turned on.  
NOTE  
o
o
o
For dehumidifying operation  
For cooling operation  
Once  
mode is selected and the unit is preset by  
following the steps below, you can have the air  
conditioner automatically bring the room to the desired  
temperature simply by pressing the ON/OFF operation  
button.  
STEP 2  
STEP 3  
To start the air conditioner, press the ON/  
OFF operation button.  
Press the TEMP. setting buttons to change  
the temperature setting to the desired  
temperature.  
STEP 1  
STEP 2  
Press the MODE selector button to  
Press the ON/OFF operation button.  
.
Adjustable temperature range:  
30 °C max.  
16 °C min.  
or  
86 °F max.  
60 °F min.  
To stop the air conditioner, press the ON/OFF operation  
button again.  
STEP 4  
STEP 5  
Set the FAN SPEED selector button to the  
setting you want.  
• To change the temperature setting; press the  
temperature setting buttons and change the setting to  
the desired temperature.  
NOTE  
Press the FLAP button and set the airflow  
direction as desired.  
(Refer to “ADJUSTING THE AIRFLOW  
DIRECTION” on page 13.)  
To stop the air conditioner, press the ON/OFF  
operation button again.  
• When multiple indoor units are used and units in other  
rooms are already operating, they will be set to the  
same mode of operation as the operating indoor units.  
NOTE  
• 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.  
• 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.  
9
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B. In Heating Mode: (  
)
3. Adjusting the Fan Speed  
A. Automatic fan speed  
Simply set the FAN SPEED selector button to the  
position.  
This automatically sets the best fan speed for the room  
temperature.  
B. Manual fan speed  
When the night setback mode is selected, the air conditioner  
automatically lowers the temperature setting 4 °F when 30  
minutes have passed after the selection was made, and then  
another 4 °F after another 30 minutes have passed, regardless of  
the indoor temperature when night setback was selected. This  
enables you to save energy without sacrificing comfort. This  
function is convenient when gentle heating is needed.  
If you want to adjust fan speed manually during operation,  
just set the FAN SPEED selector button as desired. [  
, or  
,
]
Setting  
4 °F  
temperature  
4 °F  
4. Night Setback Mode  
30 min.  
30 min.  
Time  
Press the NIGHT  
SETBACK button  
5. HIGH POWER 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.  
A. In Cooling and DRY Mode: ( and  
)
HIGH POWER mode can be used to increase the output of the  
indoor unit for all operation modes except automatic operation.  
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.  
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”.  
• HIGH POWER Mode cannot be used when the operation mode is  
in Automatic Operation.  
2 °F  
Setting  
temperature  
NOTE  
2 °F  
• When set to High fan speed during heating operation, the fan runs  
at High fan speed even though the  
mark is displayed.  
• Depending on the operating conditions, the fan speed may be  
increased by a small amount only.  
30 min.  
30 min.  
Press the NIGHT  
SETBACK button  
Time  
10  
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SPECIAL REMARKS  
SETTING THE TIMER  
‘‘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.  
Heating ( ) Operation  
Heating performance  
• Because this air conditioner heats a room by drawing in the heat of  
the outside air (heat pump system), the heating efficiency will fall  
off when the outdoor temperature is very low. If sufficient heat  
cannot be obtained with this air conditioner, use another heating  
appliance together with it.  
NOTE  
Defrosting  
In the descriptions below, the following settings are used for the  
temperature and time indicator selector button on the bottom front  
section of the remote controller.  
• Temperature: °F  
• Time: AM, PM  
• When the outdoor temperature is low, frost or ice may form on the  
heat exchanger coil, reducing heating performance. When this  
happens, a microcomputer defrosting system operates. At the  
same time, the fan on the indoor unit stops and the OPERATION  
lamp lights red and orange alternately until defrosting is completed.  
Heating operation restarts after several minutes. (This interval will  
vary slightly depending upon the outdoor temperature and the way  
in which frost forms.)  
1. How to set the present time  
(Example) To set to 10:30 pm.  
Cold draft prevention  
• For several minutes after the start of heating operation, the indoor  
fan runs at a lower speed until the indoor heat exchanger coil has  
warmed up sufficiently. However, the fan may remain stopped when  
the room temperature is low. This is because the COLD DRAFT  
PREVENTION SYSTEM is in operation.  
Cooling ( ) operation  
Operation  
Indication  
• Sometimes the indoor unit may not get to the set fan speed such as  
LOW under cool operation at very low outdoor temperatures due to  
the indoor unit being protected from ice or frost.  
1. Press the CLOCK button  
once if the time indicator is  
not flashing.  
The time indication alone  
flashes.  
Power failure during operation  
2. Press the Advance, Return  
The time can be set in 1-minute  
) button until PM 10:30 increments. Holding down the  
• In the event of power failure, the unit will stop. When the power is  
resumed, the unit will restart automatically in approximately  
15 minutes by the remote controller.  
(
,
is displayed.  
button advances the time rapidly  
in 10-minute increments.  
Clicking Sound  
3. Press the CLOCK button  
This completes the setting of the  
current time.  
again.  
Clicking sound is heard from the air conditioner  
• In heating or cooling operation, any plastic parts may expand or  
shrink due to a sudden temperature change. In this event, a  
clicking sound may occur. This is normal, and the sound will soon  
disappear.  
Remote Controller  
• The remote controller sends the setting condition to the air  
conditioner regularly at five minute intervals.  
11  
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2. How to set the OFF time  
4. How to set daily ON/OFF repeat timer  
(Example) To stop the air conditioner at 11:00 am.  
(Example) To start operation at 7:10 am. and stop the air conditioner  
at 11:00 am.  
10:30 pm.  
Present time  
7:10 am.  
ON  
11:00am.  
OFF  
Operation  
Indication  
indication is  
displayed, and the present OFF  
time is shown.  
1. Press the OFF TIME setting The timer  
button once.  
2. Press the Advance, Return  
The timer  
) button until AM 11:00 blinks.  
indication  
Operation  
Indication  
(
,
1. Set the timer ON/OFF times The present time 10:30 pm. and  
is displayed.  
The time can be set in 10-minute  
increments. Holding down the  
button advances the time rapidly  
in 10-minute increments.  
as shown in 2-1, 2, 3 and 3-1,  
2, 3.  
are displayed.  
NOTE  
3. Wait a few seconds, and then The timer  
indication  
stops blinking and the present  
time is displayed.  
the setting is complete.  
• The ON/OFF combination timer uses the current time as the  
reference, and it is activated starting from whichever set time  
comes first.  
• With the ON/OFF combination timer, the settings are repeated  
every day.  
• You can check the timer ON/OFF times after you have set them by  
pressing the ON TIME and OFF TIME setting buttons.  
3. How to set the ON time  
(Example) To start operation at 7:10 am.  
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.  
NOTE  
• The airflow direction, fan speed and temperature setting can be  
changed after a timer program has been set even when the unit is  
stopped. Even when operation is stopped during an ON timer  
program, the unit will start operating when the set time is reached  
provided that the program is not canceled.  
• When the ON timer and OFF timer are set to the same time, the  
timer operates as if it is turned off.  
Operation  
Indication  
The timer indication is  
displayed, and the present ON  
time is shown.  
1. Press the ON TIME setting  
button once.  
2. Press the Advance, Return  
The timer  
indication  
(
,
) button until AM 7:10 blinks.  
is displayed.  
The time can be set in 10-minute  
increments. Holding down the  
button advances the time rapidly  
in 10-minute increments.  
3. Wait a few seconds, and then The timer  
indication  
stops blinking and the present  
time is displayed.  
the setting is complete.  
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USING THE 1-HOUR OFF  
TIMER  
ADJUSTING THE AIRFLOW  
DIRECTION  
The vertical airflow can be adjusted by moving the flap with the  
remote controller. Do not move the flap with your hands. Confirm that  
the remote controller has been turned on. Use the FLAP button to  
set either the sweep function or one of the six airflow direction  
settings.  
1. 1-Hour OFF Timer  
A. Sweep function  
The flap starts moving  
up and down to deliver  
air over the sweep  
range.  
This function causes the unit to operate for one hour and then  
stop, regardless of whether the unit is on or off when this  
button is pressed.  
The  
indicator in the display indicates that this function is  
operating.  
Setting procedure:  
Regardless of whether the unit is operating or stopped, press the 1  
HR. TIMER button.  
B. Setting the airflow manually  
SWEEP  
Referring to the above  
illustration, use the  
FLAP button to set the  
airflow direction within  
the range used during  
the heating, cooling, or  
dehumidifying  
COOL  
DRY  
appears in the display.  
SWEEP  
HEAT  
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.  
operation.  
C. Auto flap function  
The flap is set  
to the  
recommended  
position.  
NOTE  
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER  
button is pressed once to cancel the function and then again, the  
unit continues to operate for one hour from that point in time and  
then stops.  
• It is not possible to use the OFF Timer and 1-Hour OFF Timer  
together. Whichever function is set last takes precedence. If the 1  
HR. TIMER button is pressed while the TIMER OFF function  
operates, the OFF Timer is cancelled and the unit will stop  
operating one hour later.  
NOTE  
• The flap automatically closes when the unit is off.  
• During the heating operation, the fan speed will be very low and the  
flap will be in the horizontal position (position ) until the air being  
blown out of the unit begins to warm. Once the air warms up, the  
flap position and fan speed change to the settings specified with  
the remote controller.  
2. Operation together with the daily ON/OFF  
repeat timer  
CAUTION  
The 1-Hour OFF Timer setting is given priority over the DAILY ON/  
OFF REPEAT setting.  
• Use the FLAP button on the remote controller to adjust the  
position of the flap. If you move the flap by hand, the flap  
position according to the remote controller and the actual  
flap position may no longer match. If this should happen,  
shut off the unit, wait for the flap to close, and then turn on  
the unit again; the flap position will now be normal again.  
• Do not have the flap pointed down during cooling operation.  
Condensation may begin to form around the air vent and drip  
down.  
TIPS FOR ENERGY SAVING  
Avoid  
• Do not block neither the air intake nor the air outlet. It may  
cause less performance, and may leads to malfunctions.  
• Do not let direct sunlight into the room. Use sunshades, blinds or  
curtains. If the walls and ceiling of the room are warmed by the  
sun, it will take longer to cool the room.  
Do  
• Always try to keep the air filter clean. (Refer to “CARE AND  
CLEANING”.) A clogged filter will impair the performance of the  
unit.  
• To prevent conditioned air from escaping, keep windows, doors and  
any other openings closed.  
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OPERATION WITHOUT THE  
REMOTE CONTROLLER  
CARE AND CLEANING  
• Cleaning and maintenance operations  
must be carried out by specially  
trained personnel.  
INDOOR UNIT  
While working in high places, slipping  
or falling may result in serious injury.  
• For safety, be sure to turn the air  
conditioner off and also to disconnect  
the power before cleaning.  
• Do not pour water on the indoor unit to  
clean it. This will damage the internal  
components and cause an electric  
shock hazard.  
OPERATION button  
OPERATION lamp  
Ceiling panel (Indoor Unit)  
Clean the ceiling panel of the indoor unit with a vacuum cleaner  
brush, or wipe it with a clean, soft cloth.  
If you have lost the remote controller or it has trouble, follow the  
steps below.  
If it is stained, use a clean cloth moistened with a mild liquid  
detergent. When cleaning it, be careful not to force the flaps out of  
place.  
When the air conditioner is not running  
Each time the OPERATION button is pressed, the type of operation  
conducted is indicated by the changing color of the OPERATION  
lamp. Press the button and select the lamp color that suits your  
preference for operation.  
• Never use solvents, or harsh chemicals  
CAUTION  
when cleaning the indoor unit. Do not  
wipe the plastic casing using very hot  
water.  
• Some metal edges and the fins are  
sharp and may cause injury if handled  
improperly; be especially careful when  
you clean these parts.  
Cooling operation  
(green)  
Heating  
operation (red)  
Stop  
(lamp off)  
• The internal coil and other components  
of the outdoor unit must be cleaned  
every year. Consult your dealer or  
service center.  
NOTE  
The temperature is set to the room temperature minus 4°F during  
the cooling operation and to the room temperature plus 4°F during  
the heating operation, and the fan speed and flap are set to Auto.  
Cleaning the flaps  
• The air outlet flap can be removed and washed with water.  
• Be sure to always stop operation before removing the flap.  
• After washing with water, allow it to dry, and then remount it.  
CAUTION  
• Do not move the flap with your hands.  
• When using a footstool or the like, be careful not to let it tip  
over.  
Cleaning the main unit and Remote Controller  
• Wipe clean using a soft, dry cloth.  
• To remove stubborn dirt, moisten a cloth in warm water no hotter  
than 104 °F, wring thoroughly, and then wipe.  
14  
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Air filter  
How to remove the air intake grille  
The air filter collects dust and other particles from the air and should  
be cleaned once every 6 months.  
If the filter gets blocked, the efficiency of the air conditioner drops  
greatly.  
1. Open the air intake grille.  
2. Detach the safety cord from the frame (remember to attach it  
again after cleaning or maintenance).  
3. Hold on the air intake grille and pull it towards you to detach the  
two air intake grille hinges.  
NOTE  
4. Clean the grille gently using a soft sponge, or the like. Then dry it  
The frequency with which the filter should be cleaned depends on  
the environment in which the unit is used.  
with care.  
Neutral detergent may be used to remove stubborn dirt. Then  
rinse thoroughly with water and dry it.  
How to remove the filter  
1. Slide the two latches of the air intake grille with your thumbs in the  
Air intake grille hinge  
direction of the arrow to open the grille.  
Air intake  
grille  
Ceiling  
panel  
Latch  
2. Open the air intake grille downward.  
Air intake grille hinge  
Safety cord  
• When cleaning the air filter, never  
remove the safety cord. If it is  
CAUTION  
necessary to remove it for servicing  
and maintenance inside, be sure to  
reinstall the safety cord securely (hook  
on the grille side) after the work.  
• When the air intake grille has been  
opened, rotating parts (such as the  
fan), electrically charged areas, etc. will  
be exposed in the unit’s opening. Bear  
in mind the dangers that these parts  
and areas pose, and proceed with the  
work carefully.  
Air intake grille  
3. Press the tabs on both sides of the air filter (indicated with  
marks on the grill) to release the filter, and then, lift and pull the  
filter up and out using the tabs to remove it.  
• Periodically check the outdoor unit to  
see if the air outlet or air intake is  
clogged with dirt or soot.  
Care: After a prolonged idle period  
Check the indoor and outdoor unit air intakes and outlets for  
blockage; if there is a blockage, remove it.  
Care: Before a prolonged idle period  
• Operate the fan for half a day to dry out the inside.  
• Disconnect the power supply and also turn off the circuit breaker.  
• Clean the air filter and replace it in its original position.  
• Outdoor unit internal components must be checked and cleaned  
periodically.  
Safety cord  
Air filter  
Contact your local dealer for this service.  
4. Use a vacuum cleaner to remove light dust. If there is sticky dust  
on the filter, wash the filter in lukewarm, soapy water, rinse it in  
clean water, and dry it.  
5. Insert the filter correctly again inside the grille, close the grille  
letting the latches slide towards the outside and fix again the  
latch.  
15  
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TROUBLESHOOTING  
(BEFORE CALLING FOR SERVICE)  
If your air conditioner does not work properly, first check the following  
points before requesting service. If it still does not work properly,  
contact your dealer or service center.  
OPERATING RANGE  
The air conditioner is operable within the temperature ranges as  
listed below:  
Temperature  
Indoor air  
temperature  
Outdoor air  
temperature  
COOLING  
HEATING  
Max.  
95 °F DB /  
71 °F WB  
115 °F DB  
Trouble  
Possible Cause  
Remedy  
Air conditioner does  
not run at all.  
1. Power failure.  
1. Restore power.  
Min.  
67 °F DB /  
57 °F WB  
14 °F DB  
2. Leakage circuit  
breaker tripped.  
2. Contact service  
center.  
Max.  
80 °F DB /  
67 °F WB  
75 °F DB /  
65 °F WB  
3. Line voltage is too  
low.  
3. Consult your  
electrician or  
dealer.  
Min.  
– DB / – WB  
– DB / 0 °F WB  
4. Batteries in remote 4. Replace batteries.  
controller have run  
down.  
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 the optional wired remote controller.  
OPERATION lamp  
blinks and air  
conditioner does not  
operate.  
Trouble in system.  
Contact service  
center.  
Compressor runs but Obstruction in front of Remove obstruction.  
soon stops.  
condenser coil.  
(Outdoor Unit)  
Poor cooling (or  
heating) performance.  
1. Dirty or clogged air 1. Clean air filter to  
filter.  
improve airflow.  
2. Heat source or  
many people in  
room.  
2. Eliminate heat  
source if possible.  
3. Doors and/or  
windows are open.  
3. Shut them to keep  
the heat (or cold)  
out.  
4. Obstacle near air  
intake or air  
4. Remove it to ensure  
good airflow.  
discharge port.  
5. Thermostat is set  
too high for cooling  
(or too low for  
5. Set the temperature  
lower (or higher).  
heating).  
6. (Outdoor  
temperature is too  
low for heating.)  
6. (Consult your  
dealer or try to use  
another heat  
appliance.)  
Clicking sound is  
heard from the air  
conditioner.  
In heating or cooling  
operation, any plastic the sound will soon  
parts may expand or  
shrink due to a  
This is normal, and  
disappear.  
sudden temperature  
change. In this event,  
a clicking sound may  
occur.  
OPERATION lamp  
lights but outdoor unit phones near the air  
will not run.  
The use of cellular  
1. Turn off the power  
then restart the air  
conditioner after a  
while.  
conditioner may cause  
disturbance to its  
normal operation.  
2. Consult your dealer.  
TIMER lamp blinks  
(3 sec. interval) and  
air conditioner does  
not operate.  
FLOAT SWITCH is  
actived.  
Contact service  
center.  
16  
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SPECIFICATIONS  
Indoor Unit  
Model No.  
CS-MKE9NB4U  
CS-MKE12NB4U  
Power Source  
Single-phase, 208-230 V, 60 Hz  
2.65  
9,000  
3.60  
3.50  
11,900  
4.00  
kW  
BTU/h  
kW  
Cooling Capacity  
Heating Capacity  
12,300  
33/32/31  
34/33/32  
13,600  
34/32/31  
35/34/32  
BTU/h  
dB(A)  
dB(A)  
Cooling Operation (H/M/L)  
Operation  
Sound  
Heating Operation (H/M/L)  
11-5/32×22-5/8×22-5/8  
(283×575×575)  
11-5/32×22-5/8×22-5/8  
(283×575×575)  
Unit Dimensions (H×W×D)  
inch(mm)  
lbs.(kg)  
Net Weight  
35.3(16.0)  
35.3(16.0)  
Outdoor Unit  
CU-4KE24NBU  
Model No.  
CU-3KE19NBU  
CU-4KE31NBU  
Single-phase, 208-230 V, 60 Hz  
Power Source  
5.45 [ 2.90 ~ 5.45 ]  
18,600 [ 9,800 ~ 18,600 ]  
7.30 [ 3.40 ~ 7.30 ]  
6.80 [ 2.90 ~ 6.80 ]  
23,200 [ 9,800 ~ 23,200 ] 30,600 [ 9,800 ~ 30,600 ]  
8.60 [ 3.40 ~ 8.60 ] 9.40 [ 3.40 ~ 9.40 ]  
9.00 [ 2.90 ~ 9.00 ]  
kW  
BTU/h  
kW  
BTU/h  
dB(A)  
dB(A)  
Cooling Capacity  
Heating Capacity  
24,800 [ 11,600 ~ 24,800 ] 29,200 [ 11,600 ~ 29,200 ] 32,000 [ 11,600 ~ 32,000 ]  
Cooling Operation (Hi)  
50  
52  
50  
52  
53  
52  
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  
143.3(65.0)  
143.3(65.0)  
180.8(82.0)  
Ceiling Panel  
CZ-18BT1U  
Model No.  
1-9/16×24-19/32×24-19/32  
(40×625×625)  
Unit Dimensions (H×W×D)  
inch(mm)  
Net Weight  
lbs. (kg)  
6.0(2.7)  
17  
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APPENDIX B Operating Instructions  
CS-KE18NB4UW & CZ-18BT1U  
(852-6-4181-213-00-2)  
A-2  
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Operating Instructions  
Split System Air Conditioner  
Model No.  
Indoor Units  
Outdoor Units  
(For Single use)  
CS-KE12NB41  
CS-KE18NB4UW  
CU-KE12NK1  
CU-KE18NKU  
(For Multiple use)  
CU-3KE19NBU  
CU-4KE24NBU  
CU-4KE31NBU  
Ceiling Panel  
CZ-18BT1U  
This air conditioner uses the refrigerant R410A.  
“Multiple use” is applied for the model  
CS-KE18NB4UW only.  
• “Single use” means that only one indoor unit is  
connected with one outdoor unit in a one-unit-to-one-  
unit configuration and that the remote controller’s S/M  
switch is at the “S” (Single) position.  
• “Multiple use” (i.e. Flexi-Multi system) means that two  
or more indoor units are connected with one outdoor  
unit in a multiple-unit-to-one-unit configuration and  
that the remote controller’s S/M switch is at the “M”  
(Multiple) position. (Refer to “USING THE REMOTE  
CONTROLLER” on page 8.)  
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.  
Panasonic Corporation  
1006 Kadoma, Kadoma City, Osaka, Japan  
85264181213002  
CV6233187655  
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FEATURES  
This air conditioner is an inverter type unit that automatically adjusts capability as appropriate. Details on these functions are provided below;  
refer to these descriptions when using the air conditioner.  
• Microprocessor Controlled Operation  
• Automatic Switching between Cooling and Heating  
When the remote controller’s S/M switch is at the “S”  
(Single) position  
The interior compartment of the remote controller contains  
several features to facilitate automatic operation, easy  
logically displayed for easy use.  
This unit automatically switches between cooling operation  
and heating operation according to the difference between  
the room temperature and the temperature setting.  
When the remote controller’s S/M switch is at the “M”  
(Multiple) position  
• Simple One-touch Remote Controller  
The remote controller has several features to facilitate  
automatic operation.  
Unlike when the switch is at the “S” position as described  
• 24-Hour ON or OFF Timer  
above, the function for automatically switching between  
cooling and heating does not work. Then, the air  
conditioner continuously operates under the mode selected  
at initial operation.  
This timer can be set to automatically turn the unit on or off  
at any time within a 24 hour period.  
• 1-Hour OFF Timer  
This timer can be set to automatically turn off the unit at  
any time after one hour.  
• Hot Start Heating System  
Right from the start, the air is warm and comfortable. This  
system prevents any cold blasts at the beginning while the  
heat pump is warming up, or even defrosting.  
• Night Setback  
This function saves energy by controlling operation to  
provide a quieter operating sound than normal.  
• Automatic Restart Function for Power Failure  
Even when power failure occurs, preset programmed  
operation can be reactivated once power resumes.  
• Automatic and 3-step Fan Speed  
Auto/High/Medium/Low  
• Air Sweep Control  
• High Power Operation  
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.  
If not in Auto Operation, the unit operates at maximum  
output for 30 minutes, regardless of the desired  
temperature.  
The fan speed is 1 step above “High”.  
• Auto. Flap Control  
This automatically sets the flap to the optimum position  
during heating, cooling, and drying operation.  
CONTENTS  
Page  
FEATURES................................................................................. 2  
PRODUCT INFORMATION........................................................ 2  
SAFETY PRECAUTIONS........................................................... 2  
INSTALLATION LOCATION........................................................ 3  
ELECTRICAL REQUIREMENTS ............................................... 3  
SAFETY INSTRUCTIONS.......................................................... 3  
NAMES OF PARTS .................................................................... 4  
USING THE REMOTE CONTROLLER ...................................... 8  
OPERATION WITH THE REMOTE CONTROLLER................... 9  
1. Automatic Operation ................................................... 9  
2. Manual Operation........................................................ 9  
3. Adjusting the Fan Speed........................................... 10  
4. Fan Only.................................................................... 10  
5. Night Setback Mode.................................................. 10  
6. HIGH POWER Mode................................................. 10  
Page  
SPECIAL REMARKS ................................................................11  
SETTING THE TIMER ..............................................................11  
USING THE 1-HOUR OFF TIMER ...........................................13  
TIPS FOR ENERGY SAVING...................................................13  
ADJUSTING THE AIRFLOW DIRECTION ...............................13  
OPERATION WITHOUT THE REMOTE CONTROLLER..........14  
CARE AND CLEANING ............................................................14  
TROUBLESHOOTING (BEFORE CALLING FOR SERVICE) ..16  
OPERATING RANGE................................................................16  
WIRED REMOTE CONTROLLER ............................................16  
SPECIFICATIONS.....................................................................17  
PRODUCT INFORMATION  
SAFETY PRECAUTIONS  
If you have problems or questions concerning your Air  
Conditioner, you will need the following information. Model  
and serial numbers are on the nameplate on the bottom of  
the cabinet.  
The following symbols used in this manual, alert you  
to potentially dangerous conditions to users, service  
personnel or the appliance:  
This symbol refers to a hazard or unsafe  
practice which can result in severe  
personal injury or death.  
Model No. __________________________________  
Serial No. ___________________________________  
Date of purchase _____________________________  
Dealer’s address _____________________________  
Phone number _______________________________  
This symbol refers to a hazard or unsafe  
practice which can result in personal  
CAUTION  
injury or product or property damage.  
2
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INSTALLATION LOCATION  
• To prevent possible hazards from insulation failure,  
the unit must be grounded.  
• We recommend that this air conditioner be installed  
properly by qualified installation technicians in  
accordance with the Installation Instructions  
provided with the unit.  
• Before installation, check that the voltage of the electric  
supply in your home or office is the same as the voltage  
shown on the nameplate.  
• Do not clean inside the indoor and outdoor units by users.  
Engage authorized dealer or specialist for cleaning.  
• In case of malfunction of this appliance, do not repair by  
yourself. Contact to the sales dealer or service dealer for a  
repair.  
• Refrigerant gas leakage may cause fire.  
• For safety, be sure to turn the air conditioner off and  
also to disconnect the power before cleaning.  
• Pull off the power plug from a receptacle, or switch off the  
breaker, or switch off the power disconnecting mean to  
isolate the air conditioner from the main power supply in  
case of emergency.  
• Do not install this air conditioner  
where there are fumes or flammable  
gases, or in an extremely humid space  
such as a greenhouse.  
• Do not install the air conditioner where  
excessively high heat-generating  
objects are placed.  
CAUTION  
Avoid:  
• Do not turn the air conditioner on and off from the power  
mains switch. Use the ON/OFF operation button.  
• Do not stick anything into the air outlet of the outdoor unit.  
This is dangerous because the fan is rotating at high  
speed.  
• Do not touch the air inlet or the sharp aluminum fins  
of the outdoor unit. You may get injured.  
• Keep the fire alarm and the air outlet at least 1.5m away from  
the unit.  
To protect the air conditioner from heavy corrosion, avoid installing  
the outdoor unit where salty sea water can splash directly onto it or  
in sulphurous air near a spa.  
ELECTRICAL REQUIREMENTS  
1. All wiring must conform to the local electrical codes.  
Consult your dealer or a qualified electrician for details.  
2. Each unit must be properly grounded with a ground (or  
earth) wire or through the supply wiring.  
• Do not let children play with the air conditioner.  
• Do not cool or heat the room too much if babies or invalids  
are present.  
3. Wiring must be done by a qualified electrician.  
• Do not sit or step on the unit. You may fall down  
accidentally.  
• Do not stick any object into the FAN CASE.  
You may be injured and the unit may be damaged.  
NOTE  
Pull off the power plug from a receptacle, or switch off the breaker, or  
switch off the power disconnecting mean to isolate the air conditioner  
from the main power supply when not in use for a long time.  
SAFETY INSTRUCTIONS  
NOTICE  
• Read this Instruction Manual carefully before using  
this air conditioner. If you still have any difficulties  
or problems, consult your dealer for help.  
• This air conditioner is designed to give you  
comfortable room conditions. Use this only for its  
intended purpose as described in this Instruction  
Manual.  
• This device complies with part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
(1) This device may not cause harmful interference, and (2) this  
device must accept any interference received, including  
interference that may cause undesired operation.  
• This equipment has been tested and found to comply with  
the limits for a Class B digital device, pursuant to part 15 of  
the FCC Rules.  
These limits are designed to provide reasonable protection  
against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency  
energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that  
interference will not occur in a particular installation. If this  
equipment does cause harmful interference to radio or television  
reception, which can be determined by turning the equipment off  
and on, the user is encouraged to try to correct the interference  
by one or more of the following measures:  
• Confirm to authorized dealer or specialist on usage of  
specified refrigerant type.  
Using of refrigerant other than the specified type may cause  
product damage, burst and injury etc.  
• Never touch the unit with wet hands.  
• Never use or store gasoline or other flammable vapor or  
liquid near the air conditioner — it is very dangerous.  
• Do not use this appliance in a potentially explosive  
atmosphere.  
• This air conditioner has no ventilator for intaking fresh air  
from outdoors. You must open doors or windows frequently  
when you use gas or oil heating appliances in the same  
room, which consume a lot of oxygen from the air.  
Otherwise there is a risk of suffocation in an extreme case.  
• Do not swallow the battery.  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from  
that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for  
help.  
• After removing the battery from remote controller, keep it  
away from the reach of children. The battery can cause  
death by suffocation if swallowed.  
• When inserting the battery, make sure the polarities  
(+ and -) are correct.  
• FCC Caution: To assure continued compliance, follow the  
attached installation instructions. Any changes or modifications  
not expressly approved by the party responsible for compliance  
could void the user's authority to operate this equipment.  
3
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NAMES OF PARTS  
UNIT DISPLAY AND OPERATION  
BUTTON  
INDOOR UNIT  
INDOOR UNIT  
Air Intakes  
OPERATION button  
OPERATION lamp  
Air Outlet!  
TIMER lamp  
(4 locations)  
HIGH POWER lamp  
REMOTE CONTROL receiver  
Remote Controller  
IMPORTANT  
Refrigerant Tubes  
OUTDOOR UNIT  
Avoid using radio equipment such as mobile phone near (within  
4 ft. (1.2 m)) the remote control receiver. Some radio equipment  
may cause malfunction of the unit.  
Drain Hose  
If the trouble happens, disconnect power and restart the air  
conditioner after a few minutes.  
REMOTE  
CONTROL  
receiver  
This section picks up infrared signals from the  
remote controller (transmitter).  
OPERATION  
button  
When the remote controller cannot be used,  
pressing this button enables heating and  
cooling operation.  
Air Outlet  
Each time this button is pressed, the type of  
operation conducted is indicated by the  
changing color of the OPERATION lamp. Press  
the button and select the lamp color that suits  
your preference for operation.  
NOTE  
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.  
Heating  
operation  
(red)  
Cooling  
operation  
(green)  
Stop  
(lamp off)  
This air conditioner consists of an indoor unit and an outdoor unit.  
You can control the air conditioner with the remote controller.  
Air from the room is drawn into this section and  
passes through air filters which remove dust.  
Air Intake  
OPERATION  
lamp  
This lamp lights when the system is in the  
continuous AUTO (red or green), HEAT (red),  
DRY (orange), COOL (green) and FAN (green)  
mode (but no FAN mode at M of the S/M switch  
on the remote controller).  
The OPERATION lamp lights up red and orange  
alternately when the system is defrosting.  
Conditioned air is blown out of the air  
conditioner through the air outlet.  
Air Outlet  
The remote controller controls power ON/OFF,  
operation mode selection, temperature, fan  
speed, timer setting, and air sweeping.  
Remote  
Controller  
TIMER lamp  
This lamp lights when the system is being  
controlled by the timer.  
The indoor and outdoor units are connected by  
copper tubes through which refrigerant gas  
flows.  
Refrigerant  
Tubes  
HIGH POWER  
lamp  
This lamp lights during operation in the HIGH  
POWER mode.  
Moisture in the room condenses and drains off  
through this hose.  
Drain Hose  
NOTE  
The outdoor unit contains the compressor, fan  
motor, heat exchanger coil, and other electrical  
components.  
Outdoor  
(Condensing)  
Unit  
The unit’s display lamps are dimmed during operation in the NIGHT  
SETBACK mode.  
4
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REMOTE CONTROLLER (DISPLAY)  
Displayed when transmitting data  
Displayed when indoor unit sensor is  
in use  
Displayed when setting temperature  
Displayed when temperature is shown  
Displayed when setting timer  
Displayed when the time  
display is set to 12-hour  
time.  
Symbols  
(4) Timer  
24-hour clock with ON/OFF  
(1) Operation mode  
AUTO .....................................  
HEAT......................................  
MILD DRY ..............................  
COOL.....................................  
FAN ........................................  
program Timer .......................  
ON Timer. ..............................  
OFF Timer. ............................  
1-hour OFF Timer..................  
(5) NIGHT SETBACK..................  
(2) Fan speed  
(6) Confirmation  
of transmission.......................  
Automatic operation ...............  
(7) Auto. flap indication................  
Flap angle indication..............  
Sweep indication....................  
(8) High power operation.............  
HIGH .....................................  
MEDIUM.................................  
LOW.......................................  
(3) Temperature setting  
60 – 86 °F  
When set to 80 °F  
temperature indication............  
5
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REMOTE CONTROLLER  
Transmitter  
When you press the buttons on the remote controller, the  
mark  
appears in the display to transmit the setting changes to the receiver  
in the air conditioner.  
Display  
Information on the operating conditions is displayed while the remote  
controller is switched on. If the unit is turned off, FLAP setting and  
FAN SPEED setting are not displayed.  
HIGH POWER button  
: If this button is pressed during HEAT, DRY, COOL or FAN operation,  
the unit operates at maximum output for 30 minutes, regardless of  
the desired temperature.  
The fan speed is 1step above ‘‘HIGH’’.  
FAN SPEED selector button  
: The air conditioner automatically decides the fan speeds.  
: High fan speed  
: Medium fan speed  
: Low fan speed  
FLAP button  
Press this button either to select the setting of the airflow direction to the auto.  
flap in each mode or one of the six possible positions manually or to select the  
sweep function which moves the flap up and down automatically.  
: Auto flap setting: If selected in a heating operation, the flap is set to  
position (3) in the following chart. If selected in a cooling or dry  
operation, the flap is set at position (7) in the following chart.  
: The airflow direction can be set manually. (six positions)  
: The flap moves up and down automatically.  
NOTE  
When you press the FLAP button, the air flow direction will be changed one by  
one as follows.  
SWEEP  
ON TIME/OFF TIME setting buttons  
Advance button  
Return button  
No display: The timer does not operate.  
: The air conditioner starts at the set time.  
: The air conditioner stops at the set time.  
: The air conditioner stops and starts, or starts and  
stops, at the set times every day. For details, see  
“SETTING THE TIMER”.  
CANCEL button  
SENSOR button  
When you press this button (use a small-tipped object such as a ballpoint  
pen), the  
mark will appear at the display. And the room temperature is  
detected by the sensor which is built into the indoor unit and the air  
conditioner is controlled accordingly.  
NOTE  
If the remote controller is located near a heat source, such as a space  
heater or in direct sunlight, press the SENSOR button to switch to the  
sensor on the indoor unit.  
ADDRESS switch  
• The address switch changes to prevent mixing of signals from remote controller’s when  
two air conditioners are installed next to each other. Normally, the address switch is set  
to A. For more information, please contact the dealer where you made the purchase.  
• Normally, the tabs on the remote controller should not be bent.  
Temperature display selector button  
This switches the temperature display  
between °C and °F.  
6
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Sensor  
A temperature sensor inside the remote controller senses the room  
temperature.  
ON/OFF operation button  
This button is for turning the air conditioner on and off.  
1 HR. TIMER button (1-HOUR OFF TIMER)  
: When you press this button, regardless of whether the unit is operating  
or stopping, the unit operates for one hour and then shuts down.  
Temperature setting buttons (TEMP.)  
Press the  
button to increase the set temperature.  
Press the  
button to reduce the set temperature.  
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.  
buttons is pressed.  
MODE selector button  
Use this button to select AUTO, HEAT, DRY, COOL or FAN mode.  
(AUTO)  
: When this setting is selected, the air conditioner  
calculates the difference between the thermostat setting  
and the room temperature and automatically switches to  
the ‘‘COOL’’ or ‘‘HEAT’’ mode as appropriate except at “M”  
of the S/M switch.  
(HEAT)  
(DRY)  
: The air conditioner makes the room warmer.  
: The air conditioner reduces the humidity in the room.  
: The air conditioner makes the room cooler.  
(COOL)  
(FAN)  
: The air conditioner works only as a circulation fan except  
at “M” of the S/M switch.  
NIGHT SETBACK button  
For details, see “5. Night Setback Mode”. When you press this button in the  
HEAT, DRY or COOL mode, the  
mark appears in the display, and the  
remote controller will automatically adjust the set temperature to save energy.  
CLOCK button  
Time display selector button  
This switches the time display between 24-hour time and 12-hour time.  
ACL button (ALL CLEAR)  
Puts the remote controller into pre-operation status. Always press this button  
after replacing the batteries and setting the S/M switch.  
(Cover closed)  
NOTE  
• The illustration above pictures the remote controller after the cover has been opened.  
• The remote controller sends the temperature signal to the air conditioner regularly at five minute intervals. If the signal from the  
remote controller stops for more than 15 minutes due to the loss of the remote controller or other trouble, the air conditioner will  
switch to the temperature sensor which is built into the indoor unit and control the room temperature. In these cases, the  
temperature around the remote controller may differ from the temperature detected at the air conditioner’s position.  
• The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is  
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.  
7
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USING THE REMOTE CONTROLLER  
HOW TO INSTALL BATTERIES  
HOW TO USE THE REMOTE CONTROLLER  
When using the remote controller, always point the unit’s transmitter  
head directly at the air conditioner’s receiver.  
Air Conditioner  
(Indoor unit)  
Receiver  
ACL button  
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.  
(Transmitter  
head)  
Remote Controller  
REMOTE CONTROLLER INSTALLATION  
POSITION  
• The batteries last about six months,  
depending on how much you use the  
CAUTION  
The remote controller may be operated either from a non-fixed  
position or from a wall-mounted position. To ensure that the air  
conditioner operates correctly, do not install the remote controller in  
the following places:  
remote controller. Replace the  
batteries when the remote controller’s  
display fails to light, or when the  
remote controller cannot be used to  
change the air conditioner’s settings.  
• Use two fresh leak-proof type-AAA  
alkaline batteries.  
• In replacing batteries, follow the  
instructions as mentioned in the  
subsection “HOW TO INSTALL  
BATTERIES”.  
• 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)  
• If you do not use the remote controller  
more than 1 month, take out the  
batteries.  
• Dispose of the used batteries at the  
designated location in compliance  
with the applicable local ordinances.  
MOUNTING THE REMOTE CONTROLLER  
Before mounting the remote controller, press the ON/OFF operation  
button at the mounting location to make sure that the air conditioner  
operates from that location. The indoor unit should make a beeping  
sound to indicate that it has received the signal.  
Information for Users on Collection and Disposal  
of Old Equipment and used Batteries  
Rear Side  
[Information on Disposal in other Countries  
outside the European Union]  
Remote Control Holder  
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.  
Press  
Set in  
Note for the battery symbol (bottom two symbol  
examples):  
Hole  
place  
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.  
• 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)  
Pb  
To take out the remote controller, pull it forward.  
S/M (Single/Multiple switch)  
• Initially, the S/M switch is set to S (Single).  
• Set this switch to M (Multiple) for multiple operation.  
• Always press ACL button by a thin object such as the tip of a pen  
after setting the S/M switch.  
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.  
NOTE  
When multiple indoor units are used and units in other rooms are  
already operating, they will be operating with the same mode as the  
operating indoor units.  
8
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OPERATION WITH THE REMOTE CONTROLLER  
1. Automatic Operation  
2. Manual Operation  
When the remote controller’s S/M switch is at the “S”  
(Single) position  
This unit automatically switches between cooling operation and  
heating operation according to the difference between the room  
temperature and the temperature setting.  
When the remote controller’s S/M switch is at the “M”  
(Multiple) position  
Unlike when the switch is at the “S” position as described above, the  
function for automatically switching between cooling and heating  
does not work. Then, the air conditioner calculates the difference  
between the thermostat setting and room temperature, and  
automatically determines the mode to operate under cooling or  
heating. Then, the air conditioner continuously operates under the  
mode selected at initial operation.  
STEP 2  
STEP 3  
STEP 4  
STEP 5  
STEP 1  
Check that the circuit breaker on the power panel is  
turned on.  
NOTE  
If the automatic operation settings of the unit do not  
meet your needs, press the setting buttons as  
described below and change the settings as desired.  
STEP 2  
STEP 1  
STEP 1  
Press the MODE selector button  
and select the desired mode.  
For heating operation  
o
o
o
o
For dehumidifying operation  
For cooling operation  
For fan only operation  
(No FAN mode at M of the S/M switch on  
the remote controller.)  
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.  
Check that the circuit breaker on the power panel is  
turned on.  
NOTE  
Adjustable temperature range:  
Once  
mode is selected and the unit is preset by  
30 °C max.  
16 °C min.  
or  
86 °F max.  
60 °F min.  
following the steps below, you can have the air  
conditioner automatically bring the room to the desired  
temperature simply by pressing the ON/OFF operation  
button.  
STEP 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 13.)  
STEP 1  
STEP 2  
Press the MODE selector button to  
Press the ON/OFF operation button.  
.
To stop the air conditioner, press the ON/OFF  
operation button again.  
To stop the air conditioner, press the ON/OFF operation  
button again.  
• Choose the best position in the room for the remote  
controller, which also acts as the sensor for room  
comfort and transmits the operating instructions.  
Once you’ve found this best position, always keep the  
remote controller there.  
NOTE  
• To change the temperature setting; press the  
temperature setting buttons and change the setting to  
the desired temperature.  
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.  
9
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A. In Cooling and DRY Mode: ( and  
)
3. Adjusting the Fan Speed  
A. Automatic fan speed  
Simply set the FAN SPEED selector button to the  
position.  
This automatically sets the best fan speed for the room  
temperature.  
B. Manual fan speed  
When the night setback mode is selected, the air conditioner  
automatically raises the temperature setting 2 °F when 30 minutes  
have passed after the selection was made, and then another 2 °F  
after another 30 minutes have passed, regardless of the indoor  
temperature when night setback was selected. This enables you  
to save energy without sacrificing comfort. This function is  
convenient when gentle cooling is needed.  
If you want to adjust fan speed manually during operation,  
just set the FAN SPEED selector button as desired. [  
, or  
,
]
2 °F  
4. Fan Only  
Setting  
temperature  
2 °F  
30 min.  
30 min.  
STEP 2  
STEP 1  
Press the NIGHT  
SETBACK button  
Time  
B. In Heating Mode: (  
)
When the night setback mode is selected, the air conditioner  
automatically lowers the temperature setting 4 °F when 30  
minutes have passed after the selection was made, and then  
another 4 °F after another 30 minutes have passed, regardless of  
the indoor temperature when night setback was selected. This  
enables you to save energy without sacrificing comfort. This  
function is convenient when gentle heating is needed.  
STEP 3  
If you want to circulate air without any temperature  
control, follow these steps:  
Setting  
temperature  
4 °F  
STEP 1  
Press the MODE selector button to switch to  
the fan mode  
.
4 °F  
STEP 2  
STEP 3  
Press the ON/OFF operation button.  
Press the FAN SPEED selector button to  
select the fan speed of your choice (  
or ).  
,
30 min.  
30 min.  
Time  
Press the NIGHT  
SETBACK button  
• There is no FAN only function at M of the S/M switch  
on the remote controller.  
NOTE  
6. HIGH POWER Mode  
5. Night Setback Mode  
Night Setback Mode is used for saving energy.  
HIGH POWER mode can be used to increase the output of the  
indoor unit for all operation modes except automatic operation.  
Press the NIGHT SETBACK button while unit is operating.  
Press the HIGH POWER button while unit is operating.  
The  
mark appears in the display.  
The  
mark appears in the display.  
To release the night setback function, press the NIGHT SETBACK  
button again.  
To cancel, press HIGH POWER button again.  
10  
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• 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”.  
• HIGH POWER Mode cannot be used when the operation mode is  
in Automatic Operation.  
SETTING THE TIMER  
NOTE  
• When set to High fan speed during heating operation, the fan runs  
at High fan speed even though the  
mark is displayed.  
• Depending on the operating conditions, the fan speed may be  
increased by a small amount only.  
SPECIAL REMARKS  
‘‘DRY’’ ( ) Operation  
How it works?  
• Once the room temperature reaches the level that was set, the  
unit’s operation frequency is changed automatically.  
• During DRY operation, the fan speed automatically runs at lower  
speed for providing a comfortable breeze.  
• ‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F  
or less.  
NOTE  
In the descriptions below, the following settings are used for the  
temperature and time indicator selector button on the bottom front  
section of the remote controller.  
• Temperature: °F  
• Time: AM, PM  
Heating ( ) Operation  
Heating performance  
• Because this air conditioner heats a room by drawing in the heat of  
the outside air (heat pump system), the heating efficiency will fall  
off when the outdoor temperature is very low. If sufficient heat  
cannot be obtained with this air conditioner, use another heating  
appliance together with it.  
1. How to set the present time  
(Example) To set to 10:30 pm.  
Defrosting  
• When the outdoor temperature is low, frost or ice may form on the  
heat exchanger coil, reducing heating performance. When this  
happens, a microcomputer defrosting system operates. At the  
same time, the fan on the indoor unit stops and the OPERATION  
lamp lights red and orange alternately until defrosting is completed.  
Heating operation restarts after several minutes. (This interval will  
vary slightly depending upon the outdoor temperature and the way  
in which frost forms.)  
Operation  
Indication  
1. Press the CLOCK button  
once if the time indicator is  
not flashing.  
The time indication alone  
flashes.  
Cold draft prevention  
• For several minutes after the start of heating operation, the indoor  
fan runs at a lower speed until the indoor heat exchanger coil has  
warmed up sufficiently. However, the fan may remain stopped when  
the room temperature is low. This is because the COLD DRAFT  
PREVENTION SYSTEM is in operation.  
2. Press the Advance, Return  
The time can be set in 1-minute  
) button until PM 10:30 increments. Holding down the  
(
,
is displayed.  
button advances the time rapidly  
in 10-minute increments.  
3. Press the CLOCK button  
This completes the setting of the  
current time.  
Cooling ( ) operation  
again.  
• Sometimes the indoor unit may not get to the set fan speed such as  
LOW under cool operation at very low outdoor temperatures due to  
the indoor unit being protected from ice or frost.  
Power failure during operation  
• In the event of power failure, the unit will stop. When the power is  
resumed, the unit will restart automatically in approximately  
5 minutes, or 15 minutes at M position of the S/M switch on AUTO  
mode by the remote controller.  
Clicking Sound  
Clicking sound is heard from the air conditioner  
• In heating or cooling operation, any plastic parts may expand or  
shrink due to a sudden temperature change. In this event, a  
clicking sound may occur. This is normal, and the sound will soon  
disappear.  
Remote Controller  
• The remote controller sends the setting condition to the air  
conditioner regularly at five minute intervals.  
11  
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2. How to set the OFF time  
4. How to set daily ON/OFF repeat timer  
(Example) To stop the air conditioner at 11:00 am.  
(Example) To start operation at 7:10 am. and stop the air conditioner  
at 11:00 am.  
10:30 pm.  
Present time  
7:10 am.  
ON  
11:00am.  
OFF  
Operation  
Indication  
indication is  
displayed, and the present OFF  
time is shown.  
1. Press the OFF TIME setting The timer  
button once.  
2. Press the Advance, Return  
The timer  
) button until AM 11:00 blinks.  
indication  
Operation  
Indication  
(
,
1. Set the timer ON/OFF times The present time 10:30 pm. and  
is displayed.  
The time can be set in 10-minute  
increments. Holding down the  
button advances the time rapidly  
in 10-minute increments.  
as shown in 2-1, 2, 3 and 3-1,  
2, 3.  
are displayed.  
NOTE  
3. Wait a few seconds, and then The timer  
indication  
stops blinking and the present  
time is displayed.  
the setting is complete.  
• The ON/OFF combination timer uses the current time as the  
reference, and it is activated starting from whichever set time  
comes first.  
• With the ON/OFF combination timer, the settings are repeated  
every day.  
• You can check the timer ON/OFF times after you have set them by  
pressing the ON TIME and OFF TIME setting buttons.  
3. How to set the ON time  
(Example) To start operation at 7:10 am.  
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.  
NOTE  
• The airflow direction, fan speed and temperature setting can be  
changed after a timer program has been set even when the unit is  
stopped. Even when operation is stopped during an ON timer  
program, the unit will start operating when the set time is reached  
provided that the program is not canceled.  
• When the ON timer and OFF timer are set to the same time, the  
timer operates as if it is turned off.  
Operation  
Indication  
The timer indication is  
displayed, and the present ON  
time is shown.  
1. Press the ON TIME setting  
button once.  
2. Press the Advance, Return  
The timer  
indication  
(
,
) button until AM 7:10 blinks.  
is displayed.  
The time can be set in 10-minute  
increments. Holding down the  
button advances the time rapidly  
in 10-minute increments.  
3. Wait a few seconds, and then The timer  
indication  
stops blinking and the present  
time is displayed.  
the setting is complete.  
12  
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USING THE 1-HOUR OFF  
TIMER  
ADJUSTING THE AIRFLOW  
DIRECTION  
The vertical airflow can be adjusted by moving the flap with the  
remote controller. Do not move the flap with your hands. Confirm that  
the remote controller has been turned on. Use the FLAP button to  
set either the sweep function or one of the six airflow direction  
settings.  
1. 1-Hour OFF Timer  
A. Sweep function  
The flap starts moving  
up and down to deliver  
air over the sweep  
range.  
This function causes the unit to operate for one hour and then  
stop, regardless of whether the unit is on or off when this  
button is pressed.  
The  
indicator in the display indicates that this function is  
operating.  
Setting procedure:  
Regardless of whether the unit is operating or stopped, press the 1  
HR. TIMER button.  
B. Setting the airflow manually  
SWEEP  
Referring to the above  
illustration, use the  
FLAP button to set the  
airflow direction within  
the range used during  
the heating, cooling, or  
dehumidifying  
COOL  
DRY  
FAN  
appears in the display.  
SWEEP  
HEAT  
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.  
operation.  
C. Auto flap function  
The flap is set  
to the  
recommended  
position.  
NOTE  
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER  
button is pressed once to cancel the function and then again, the  
unit continues to operate for one hour from that point in time and  
then stops.  
• It is not possible to use the OFF Timer and 1-Hour OFF Timer  
together. Whichever function is set last takes precedence. If the 1  
HR. TIMER button is pressed while the TIMER OFF function  
operates, the OFF Timer is cancelled and the unit will stop  
operating one hour later.  
NOTE  
• The flap automatically closes when the unit is off.  
• During the heating operation, the fan speed will be very low and the  
flap will be in the horizontal position (position ) until the air being  
blown out of the unit begins to warm. Once the air warms up, the  
flap position and fan speed change to the settings specified with  
the remote controller.  
2. Operation together with the daily ON/OFF  
repeat timer  
CAUTION  
The 1-Hour OFF Timer setting is given priority over the DAILY ON/  
OFF REPEAT setting.  
• Use the FLAP button on the remote controller to adjust the  
position of the flap. If you move the flap by hand, the flap  
position according to the remote controller and the actual  
flap position may no longer match. If this should happen,  
shut off the unit, wait for the flap to close, and then turn on  
the unit again; the flap position will now be normal again.  
• Do not have the flap pointed down during cooling operation.  
Condensation may begin to form around the air vent and drip  
down.  
TIPS FOR ENERGY SAVING  
Avoid  
• Do not block neither the air intake nor the air outlet. It may  
cause less performance, and may leads to malfunctions.  
• Do not let direct sunlight into the room. Use sunshades, blinds or  
curtains. If the walls and ceiling of the room are warmed by the  
sun, it will take longer to cool the room.  
Do  
• Always try to keep the air filter clean. (Refer to “CARE AND  
CLEANING”.) A clogged filter will impair the performance of the  
unit.  
• To prevent conditioned air from escaping, keep windows, doors and  
any other openings closed.  
13  
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OPERATION WITHOUT THE  
REMOTE CONTROLLER  
CARE AND CLEANING  
• Cleaning and maintenance operations  
must be carried out by specially  
trained personnel.  
INDOOR UNIT  
While working in high places, slipping  
or falling may result in serious injury.  
• For safety, be sure to turn the air  
conditioner off and also to disconnect  
the power before cleaning.  
• Do not pour water on the indoor unit to  
clean it. This will damage the internal  
components and cause an electric  
shock hazard.  
OPERATION button  
OPERATION lamp  
Ceiling panel (Indoor Unit)  
Clean the ceiling panel of the indoor unit with a vacuum cleaner  
brush, or wipe it with a clean, soft cloth.  
If you have lost the remote controller or it has trouble, follow the  
steps below.  
If it is stained, use a clean cloth moistened with a mild liquid  
detergent. When cleaning it, be careful not to force the flaps out of  
place.  
When the air conditioner is not running  
Each time the OPERATION button is pressed, the type of operation  
conducted is indicated by the changing color of the OPERATION  
lamp. Press the button and select the lamp color that suits your  
preference for operation.  
• Never use solvents, or harsh chemicals  
CAUTION  
when cleaning the indoor unit. Do not  
wipe the plastic casing using very hot  
water.  
• Some metal edges and the fins are  
sharp and may cause injury if handled  
improperly; be especially careful when  
you clean these parts.  
Cooling operation  
(green)  
Heating  
operation (red)  
Stop  
(lamp off)  
• The internal coil and other components  
of the outdoor unit must be cleaned  
every year. Consult your dealer or  
service center.  
NOTE  
The temperature is set to the room temperature minus 4°F during  
the cooling operation and to the room temperature plus 4°F during  
the heating operation, and the fan speed and flap are set to Auto.  
Cleaning the flaps  
• The air outlet flap can be removed and washed with water.  
• Be sure to always stop operation before removing the flap.  
• After washing with water, allow it to dry, and then remount it.  
CAUTION  
• Do not move the flap with your hands.  
• When using a footstool or the like, be careful not to let it tip  
over.  
Cleaning the main unit and Remote Controller  
• Wipe clean using a soft, dry cloth.  
• To remove stubborn dirt, moisten a cloth in warm water no hotter  
than 104 °F, wring thoroughly, and then wipe.  
14  
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Air filter  
How to remove the air intake grille  
The air filter collects dust and other particles from the air and should  
be cleaned once every 6 months.  
If the filter gets blocked, the efficiency of the air conditioner drops  
greatly.  
1. Open the air intake grille.  
2. Detach the safety cord from the frame (remember to attach it  
again after cleaning or maintenance).  
3. Hold on the air intake grille and pull it towards you to detach the  
two air intake grille hinges.  
NOTE  
4. Clean the grille gently using a soft sponge, or the like. Then dry it  
The frequency with which the filter should be cleaned depends on  
the environment in which the unit is used.  
with care.  
Neutral detergent may be used to remove stubborn dirt. Then  
rinse thoroughly with water and dry it.  
How to remove the filter  
1. Slide the two latches of the air intake grille with your thumbs in the  
Air intake grille hinge  
direction of the arrow to open the grille.  
Air intake  
grille  
Ceiling  
panel  
Latch  
2. Open the air intake grille downward.  
Air intake grille hinge  
Safety cord  
• When cleaning the air filter, never  
remove the safety cord. If it is  
CAUTION  
necessary to remove it for servicing  
and maintenance inside, be sure to  
reinstall the safety cord securely (hook  
on the grille side) after the work.  
• When the air intake grille has been  
opened, rotating parts (such as the  
fan), electrically charged areas, etc. will  
be exposed in the unit’s opening. Bear  
in mind the dangers that these parts  
and areas pose, and proceed with the  
work carefully.  
Air intake grille  
3. Press the tabs on both sides of the air filter (indicated with  
marks on the grill) to release the filter, and then, lift and pull the  
filter up and out using the tabs to remove it.  
• Periodically check the outdoor unit to  
see if the air outlet or air intake is  
clogged with dirt or soot.  
Care: After a prolonged idle period  
Check the indoor and outdoor unit air intakes and outlets for  
blockage; if there is a blockage, remove it.  
Care: Before a prolonged idle period  
• Operate the fan for half a day to dry out the inside.  
• Disconnect the power supply and also turn off the circuit breaker.  
• Clean the air filter and replace it in its original position.  
• Outdoor unit internal components must be checked and cleaned  
periodically.  
Safety cord  
Air filter  
Contact your local dealer for this service.  
4. Use a vacuum cleaner to remove light dust. If there is sticky dust  
on the filter, wash the filter in lukewarm, soapy water, rinse it in  
clean water, and dry it.  
5. Insert the filter correctly again inside the grille, close the grille  
letting the latches slide towards the outside and fix again the  
latch.  
15  
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TROUBLESHOOTING  
(BEFORE CALLING FOR SERVICE)  
If your air conditioner does not work properly, first check the following  
points before requesting service. If it still does not work properly,  
contact your dealer or service center.  
OPERATING RANGE  
The air conditioner is operable within the temperature ranges as  
listed below:  
Temperature  
Indoor air  
temperature  
Outdoor air  
temperature  
COOLING  
Max.  
95 °F DB /  
71 °F WB  
115 °F DB  
Trouble  
Possible Cause  
Remedy  
Air conditioner does  
not run at all.  
1. Power failure.  
1. Restore power.  
Min.  
67 °F DB /  
57 °F WB  
For Single use  
0 °F DB  
2. Leakage circuit  
breaker tripped.  
2. Contact service  
center.  
For Multiple  
use  
14 °F DB  
3. Line voltage is too  
low.  
3. Consult your  
electrician or  
dealer.  
HEATING  
Max.  
Min.  
80 °F DB /  
67 °F WB  
75 °F DB /  
65 °F WB  
4. Batteries in remote 4. Replace batteries.  
controller have run  
down.  
– DB / – WB  
– DB / 0 °F WB  
OPERATION lamp  
blinks and air  
conditioner does not  
operate.  
Trouble in system.  
Contact service  
center.  
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 the optional wired remote controller.  
Compressor runs but Obstruction in front of Remove obstruction.  
soon stops.  
condenser coil.  
(Outdoor Unit)  
Poor cooling (or  
heating) performance.  
1. Dirty or clogged air 1. Clean air filter to  
filter.  
improve airflow.  
2. Heat source or  
many people in  
room.  
2. Eliminate heat  
source if possible.  
3. Doors and/or  
windows are open.  
3. Shut them to keep  
the heat (or cold)  
out.  
4. Obstacle near air  
intake or air  
4. Remove it to ensure  
good airflow.  
discharge port.  
5. Thermostat is set  
too high for cooling  
(or too low for  
5. Set the temperature  
lower (or higher).  
heating).  
6. (Outdoor  
temperature is too  
low for heating.)  
6. (Consult your  
dealer or try to use  
another heat  
appliance.)  
Clicking sound is  
heard from the air  
conditioner.  
In heating or cooling  
operation, any plastic the sound will soon  
parts may expand or  
shrink due to a  
This is normal, and  
disappear.  
sudden temperature  
change. In this event,  
a clicking sound may  
occur.  
OPERATION lamp  
lights but outdoor unit phones near the air  
will not run.  
The use of cellular  
1. Turn off the power  
then restart the air  
conditioner after a  
while.  
conditioner may cause  
disturbance to its  
normal operation.  
2. Consult your dealer.  
TIMER lamp blinks  
(3 sec. interval) and  
air conditioner does  
not operate.  
FLOAT SWITCH is  
actived.  
Contact service  
center.  
16  
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SPECIFICATIONS  
• For Single use  
Model No.  
Outdoor Unit  
CU-KE12NK1  
Indoor Unit  
CS-KE12NB41  
Power Source  
Cooling Capacity  
Single-phase, 115 V, 60 Hz  
3.50 [ 0.90 ~ 3.50 ]  
11,900 [ 3,000 ~ 11,900 ]  
4.00 [ 0.90 ~ 4.00 ]  
kW  
BTU/h  
kW  
Heating Capacity  
13,600 [ 3,000 ~ 13,600 ]  
BTU/h  
Cooling  
Operation  
Outdoor (Hi)  
Indoor(H/M/L)  
Outdoor (Hi)  
Indoor(H/M/L)  
47  
-
49  
-
-
dB(A)  
Operation  
Sound  
34/32/31  
-
Heating  
Operation  
dB(A)  
35/34/32  
21-9/16×28-11/32×10-7/16  
(548×720×265)  
11-5/32×22-5/8×22-5/8  
(283×575×575)  
Unit Dimensions (H×W×D)  
inch(mm)  
lbs.(kg)  
Net Weight  
77.2(35.0)  
35.3(16.0)  
• For Single use  
Outdoor Unit  
CU-KE18NKU  
Indoor Unit  
CS-KE18NB4UW  
Model No.  
Power Source  
Single-phase, 208-230 V, 60 Hz  
5.15 [ 1.20 ~ 5.15 ]  
17,500 [ 4,000 ~ 17,500 ]  
6.00 [ 1.30 ~ 6.00 ]  
kW  
BTU/h  
kW  
Cooling Capacity  
Heating Capacity  
20,400 [ 4,400 ~ 20,400 ]  
BTU/h  
Cooling  
Operation  
Outdoor (Hi)  
Indoor(H/M/L)  
Outdoor (Hi)  
Indoor(H/M/L)  
51  
-
52  
-
-
dB(A)  
Operation  
Sound  
44/40/36  
-
44/40/36  
Heating  
Operation  
dB(A)  
Unit Dimensions (H×W×D)  
(Indoor unit : Include panel)  
26-3/8×34-21/32×11-7/32  
(670×880×285)  
11-5/32×22-5/8×22-5/8  
(283×575×575)  
inch(mm)  
lbs.(kg)  
Net Weight  
97.0(44.0)  
35.3(16.0)  
Ceiling Panel  
Model No.  
CZ-18BT1U  
1-9/16×24-19/32×24-19/32  
(40×625×625)  
Unit Dimensions (H×W×D)  
inch(mm)  
Net Weight  
lbs. (kg)  
6.0(2.7)  
17  
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SPECIFICATIONS (CONTINUED)  
• For Multiple use  
Indoor Unit  
CS-KE18NB4UW  
Model No.  
Power Source  
Cooling Capacity  
Single-phase, 208-230 V, 60 Hz  
5.15  
17,500  
6.00  
kW  
BTU/h  
kW  
Heating Capacity  
20,400  
BTU/h  
Cooling Operation  
dB(A)  
dB(A)  
44/40/36  
44/40/36  
Operation  
Sound  
(H/M/L)  
Heating Operation  
(H/M/L)  
11-5/32×22-5/8×22-5/8  
(283×575×575)  
Unit Dimensions (H×W×D)  
inch(mm)  
lbs.(kg)  
Net Weight  
35.3(16.0)  
• For Multiple use  
Outdoor Unit  
CU-4KE24NBU  
Model No.  
CU-3KE19NBU  
CU-4KE31NBU  
Single-phase, 208-230 V, 60 Hz  
Power Source  
5.45 [ 2.90 ~ 5.45 ]  
18,600 [ 9,800 ~ 18,600 ]  
7.30 [ 3.40 ~ 7.30 ]  
6.80 [ 2.90 ~ 6.80 ]  
23,200 [ 9,800 ~ 23,200 ] 30,600 [ 9,800 ~ 30,600 ]  
8.60 [ 3.40 ~ 8.60 ] 9.40 [ 3.40 ~ 9.40 ]  
9.00 [ 2.90 ~ 9.00 ]  
kW  
BTU/h  
kW  
BTU/h  
dB(A)  
dB(A)  
Cooling Capacity  
Heating Capacity  
24,800 [ 11,600 ~ 24,800 ] 29,200 [ 11,600 ~ 29,200 ] 32,000 [ 11,600 ~ 32,000 ]  
Cooling Operation (Hi)  
50  
52  
50  
52  
53  
52  
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  
143.3(65.0)  
143.3(65.0)  
180.8(82.0)  
18  
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APPENDIX C INSTALLATION INSTRUCTIONS  
CS-MKE9NB4U & CZ-18BT1U  
CS-MKE12NB4U & CZ-18BT1U  
CS-KE18NB4UW & CZ-18BT1U  
(852-6-4190-585-00-1)  
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.  
Model No.  
1-3. Optional Copper Tubing Kit  
1-4. Type of Copper Tube and Insulation Material  
1-5. Additional Materials Required for Installation  
Indoor Unit  
Outdoor Unit  
CS-MKE9NB4U  
CS-MKE12NB4U  
CS-KE18NB4UW  
CU-3KE19NBU  
CU-4KE24NBU  
CU-4KE31NBU  
2. INSTALLATION SITE SELECTION ................... 5  
2-1. Indoor Unit  
2-2. Embedding the Tubing and Wiring  
Power Source:  
60 Hz, single-phase, 230 / 208 VAC  
3. HOW TO INSTALL THE INDOOR UNIT ............. 7  
3-1. Preparation for Suspending  
3-2. Suspending the Indoor Unit  
3-3. Placing the Unit Inside the Ceiling  
3-4. Installing the Drain Piping  
Ceiling Panel  
CZ-18BT1U  
3-5. Checking the Drainage  
3-6. How to Install the Ceiling Panel  
3-7. Wiring Instructions  
3-8. Wiring Instructions for Inter-unit Connections  
4. HOW TO TEST RUN THE AIR CONDITIONER... 14  
5. REMOTE CONTROLLER INSTALLATION  
POSITION ......................................................... 15  
5-1. Mounting on a Wall  
6. ADDRESS SWITCH.......................................... 16  
6-1. Address Setting of the Remote Controller  
7. CONNECTING A HOME AUTOMATION  
DEVICE.............................................................. 17  
8. INSTALLATION CHECK SHEET ...................... 17  
85264190585001 2011  
CV6233187846  
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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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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  
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or re-installation, and while repairing refrigeration parts.  
Handle liquid refrigerant carefully as it may cause frost-  
bite.  
CAUTION  
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the refrigeration system. Escaped refrigerant gas, on  
contact with fire or heat, can produce dangerously  
toxic gas.  
When Servicing  
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before opening the unit to check or repair electrical  
parts and wiring.  
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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.  
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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  
This booklet briefly outlines where and how to install the air conditioning system. Please read over the entire set of instruc-  
tions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.  
1-1. Tools Required for Installation (not supplied)  
1. Standard screwdriver  
2. Phillips head screwdriver  
3. Knife or wire stripper  
4. Tape measure  
6. Sabre saw or key hole saw  
7. Hacksaw  
8. Core bits  
9. Hammer  
10. Drill  
11. Tube cutter  
12. Tube flaring tool  
13. Torque wrench  
14. Adjustable wrench  
15. Reamer (for deburring)  
5. Carpenter’s level  
1-2. Accessories Supplied with Unit  
Table 1  
Parts  
Figure  
Q'ty  
Remarks  
Parts  
Figure  
Q'ty  
Remarks  
For temporarily  
suspending indoor  
unit from ceiling  
For full-scale  
installation  
diagram  
3/16 13/32"  
(5 10mm)  
Washer  
8
Truss head screw  
4
For wide /  
Flare  
2
For unit & PVC  
tube connection  
1/8"(T3)  
narrow tube  
connection  
Drain hose  
1
2
2
4
insulation  
set  
3/16"(T5)  
ꢆꢂꢇꢈꢉꢊꢄ/ꢇꢋꢌꢅ  
For wide /  
narrow tube /  
flare nut connection  
For drain hose  
connection  
Insulation tape  
Vinyl tie  
2
8
1
1
1
2
1
Hose band  
3/32"(T2)  
For flare / drain  
insulating  
connection  
Truss-head Phillips  
5/32 5/8"  
(4 16mm)  
Tapping screw  
Truss head screw  
5/32 15/32"  
(4 12mm)  
Drain hose  
insulation  
For drain tube  
connection  
13/32"(T10)  
Packed in the  
ceiling panel  
Remote  
controller  
Special screw  
4
3/16 1-9/16"  
(5 40mm)  
Remote control  
holder  
Use M10 or 3/8" for suspension bolts.  
Suspension bolts and nuts (locally purchased)  
AAA alkaline  
battery  
Full-scale  
installation  
diagram  
Printed on  
container box  
1-3. Optional Copper Tubing Kit  
Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide tub-  
ing, fittings and insulation. Consult your nearest sales outlet or air conditioning workshop.  
1-4. Type of Copper Tube and Insulation Material  
If you wish to purchase these materials separately from a local source, you will need:  
1. Deoxidized annealed copper tube for refrigerant tubing as detailed in Table 2.  
Cut each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to dampen vibration between units.  
2. Foamed polyethylene insulation for the specified copper tubes as required to precise length of tubing. Wall thickness  
of the insulation should be not less than 5/16" (8 mm).  
3. Use insulated copper wire for field wiring. Wire size varies with the total length of wiring. Refer to 3-7. Wiring Instruc-  
tions for details.  
CAUTION  
Table 2  
Narrow Tube  
Wide Tube  
Check local electrical codes  
and regulations before  
obtaining wire. Also, check  
any specified instructions or  
limitations.  
Model  
Outer Dia.  
Thickness  
Outer Dia.  
3/8" (9.52 mm)  
Thickness  
CS-MKE9NB4U  
CS-MKE12NB4U  
1/4" (6.35 mm)  
1/4" (6.35 mm)  
0.0314" (0.8 mm)  
0.0314" (0.8 mm)  
CS-KE18NB4UW  
0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)  
4
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1-5. Additional Materials Required for Installation  
1. Refrigeration (armored) tape  
2. Insulated staples or clamps for connecting wire  
(See local codes.)  
3. Putty  
4. Refrigeration lubricant  
5. Clamps or saddles to secure refrigerant tubing  
2. Installation Site Selection  
2-1. Indoor Unit  
To prevent abnormal heat 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.  
AVOID:  
ꢀ direct sunlight.  
ꢀ nearby heat sources that may affect performance of the  
3.3 ft.  
(1m)  
3.3 ft.  
(1m)  
unit.  
ꢀ areas where leakage of flammable gas may be expected.  
3.3 ft.  
(1m)  
ꢀ placing or allowing any obstructions near the air conditioner  
3.3 ft.  
3.3 ft.  
(1m)  
(1m)  
inlet or outlet.  
ꢀ installing in rooms that contain instant-on (rapid-start)  
fluorescent lamps. (These may prevent the air conditioner  
from receiving signals.)  
Fig. 1  
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.  
Fig. 2  
ꢀ 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.  
CAUTION  
ꢀ allow room for operation and maintenance as well as  
Air delivery will be degraded if the distance  
from the floor to the ceiling is greater than  
10 ft. (3 m).  
unrestricted air flow around the unit. (Fig. 1)  
ꢀ install the unit within the maximum elevation difference  
(H1, H2, H3, H4) above or below the outdoor unit and  
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from the outdoor unit as detailed in Table 3 and Fig. 2.  
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.)  
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* 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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Hole-in-anchor  
Hole-in-plug  
3. How to Install the Indoor Unit  
Concrete  
Insert  
3-1. Preparation for Suspending  
This unit uses a drain pump. Use a carpenter’s level to  
check that the unit is level.  
3-2. Suspending the Indoor Unit  
Suspension bolt (M10 or 3/8")  
(locally purchased)  
(1) Fix the suspension bolts securely in the ceiling using  
the method shown in the diagrams, by attaching  
them to the ceiling support structure, or by any other  
method that ensures that the unit will be securely  
and safely suspended. (Fig. 6-1)  
Fig. 6-1  
23-5/8"(600mm  
Ceiling opening dimensions  
21-1/32"(534mm  
Suspension bolt pitch  
)
)
(2) Follow the diagram to make the holes in the ceiling.  
(3) Determine the pitch of the suspension bolts using  
the supplied full-scale installation diagram. The dia-  
gram shows the relationship between the positions  
of the suspension fitting, unit, and panel. (Fig. 6-2)  
3-3. Placing the Unit Inside the Ceiling  
22-5/8"(575mm  
6-5/16" 6-11/16"  
(160mm (170mm  
)
(1) Be sure to remove the fan protection (4pcs) for  
transportation before hanging up the indoor unit.  
Drain tube  
connection port  
2-3/32"  
(53mm  
(outer dia 1-1/32"( 26mm))  
)
)
)
(2) When placing the unit inside the ceiling, determine  
the pitch of the suspension bolts using the supplied  
full-scale installation diagram. (Fig. 6-3)  
Tubing and wiring must be laid inside the ceiling  
when suspending the unit. If the ceiling is already  
constructed, lay the tubing and wiring into position  
for connection to the unit before placing the unit  
inside the ceiling.  
Power supply port  
Refrigerant tubing joint  
(narrow tube side)  
1/4( 6.35mm) (flared)  
Fig. 6-2  
(3) The length of suspension bolts must be appropriate  
for a distance between the bottom of the bolt and the  
bottom of the unit of more than 19/32" (15 mm) as  
shown in the diagram. (Fig. 6-3)  
(4) Thread the 3 hexagonal nuts (locally purchased) and  
2 supplied washers onto each of the 4 suspension  
bolts as shown in the diagram. Use 1 nut and 1  
washer for the upper side, and 2 nuts and 1 washer  
for the lower side, so that the unit will not fall off the  
suspension lugs. (Fig. 6-4)  
Full-scale installation diagram  
(printed on top of container box)  
Supplied screw  
Fig. 6-3  
Suspension bolt  
(5) Adjust so that the distance between the unit and the  
ceiling bottom is 1/2" (13 mm) to 23/32" (18 mm).  
Tighten the nuts on the upper side and lower side of  
the suspension lug. (Fig. 6-4)  
Suspension lug  
Nuts and washers  
(used for upper and lower)  
Notch  
Double nut  
1/2" – 23/32"  
(13~18mm  
)
Fig. 6-4  
7
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Twist tie  
(4 vinyl ties, supplied)  
3-4. Installing the Drain Piping  
Hard PVC pipe  
(equivalent to  
O.D. 1-1/32" (26mm))  
(locally purchased)  
Drain hose  
insulation  
(supplied)  
(1) Prepare standard hard PVC pipe (locally purchased O.D.  
1-1/32" (26 mm)) for the drain and use the supplied hose  
band to prevent water leaks. (Fig. 6-5)  
Position to  
fasten hose  
bands  
Drain port  
(2) To install the drain hose, first place 1 of the 2 hose bands  
over the unit drain port and the other hose band over the  
hard PVC pipe (not supplied). Then connect both ends of  
the supplied drain hose. (Fig. 6-5)  
Drain hose  
(supplied)  
(3) On the unit drain side, grasp the hose band with pliers  
and insert the drain hose all the way to the base.  
3/16"  
3/16"  
(5mm  
15/16"  
(25mm  
(5mm  
)
)
15/16"  
Hose band  
(2 bands, supplied)  
ꢀ If other commercially available hose bands are used, the  
drain hose may become pinched or wrinkled and there is  
danger of water leakage. Therefore be sure to use the  
supplied hose bands. When sliding the hose bands, be  
careful to avoid scratching the drain hose.  
(25mm  
)
)
5-1/2"(140mm  
)
Unit  
Fig. 6-5  
ꢀ Do not use adhesive when connecting the supplied drain  
hose to the drain port (either on the main unit or the PVC  
pipe).  
ꢀ Attach so that the hose band  
fastener is on the side of the  
drain port.  
ꢀ Attach the hose bands so that  
each is approximately 3/16"  
(5 mm) to 15/16" (25 mm) from  
the end of the supplied drain  
hose.  
CAUTION  
Reasons: a) It may cause water to leak from the connec-  
tion. Since the connection is slippery just  
after the adhesive has been applied, the  
pipe easily slips off.  
b) The pipe cannot be removed when mainte-  
nance is needed.  
Air bleeder prohibited  
(4) Wrap the hose with the supplied drain hose insulation  
and use the 4 twist ties so that the hose is insulated with  
no gaps.  
ꢀ Do not bend the supplied drain hose 90° or more. The  
hose may slip off.  
Fig. 6-6  
NOTE  
Make sure the drain pipe has a downward gradient (1/100 or  
more) and that there are no water traps.  
ꢀ Do not install an air bleeder as  
this may cause water to spray  
from the drain pipe outlet.  
(Fig. 6-6)  
CAUTION  
CAUTION  
1 ft.(300mm) or less  
ꢀ In cases where it is necessary to raise the height of the  
drain piping, the drain piping can be raised to a maximum  
height of 2.78 ft. (850 mm) above the bottom surface of  
the ceiling. Under no conditions attempt to raise it higher  
than 2.78 ft. (850 mm) above the bottom surface of the  
ceiling. Doing so will result in water leakage. (Fig. 6-7)  
ꢀ Do not use natural drainage.  
2.78 ft.(850mm) or less  
0 - 45  
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Fig. 6-7  
ꢀ Do not install the pipe with an upward gradient from the  
connection port. This will cause the drain water to flow  
backward and leak when the unit is not operating.  
(Fig. 6-8)  
Uphill slope  
ꢀ Do not apply force to the piping on the unit side when  
connecting the drain pipe. The pipe should not be allowed  
to hang unsupported from its connection to the unit. Fas-  
ten the pipe to a wall, frame, or other support as close to  
the unit as possible. (Fig. 6-9)  
Fig. 6-8  
Support  
bracket  
ꢀ Provide insulation for any pipes that are run indoors.  
Fig. 6-9  
8
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Water drain  
3-5. Checking the Drainage  
After wiring and drain piping are completed, use the following pro-  
cedure to check that the water will drain smoothly. For this, pre-  
pare a bucket and wiping cloth to catch and wipe up spilled water.  
ꢀ Be sure to do the wiring between the units before installing the  
ceiling panel. (Refer to 3-8. Wiring Instructions for Inter-unit  
Connections)  
(1) Turn on the power. (Here, “power” refers to the power supply  
from the outdoor unit.)  
Over 4"  
(100mm  
)
Control box  
(2) Slowly pour approx. 16 ounces (500 ml) of water into the drain  
pan to check drainage. (Fig. 6-10a)  
(3) Remove the 2 screws from the control box cover, then open  
the cover. Be careful not to drop the cover at this time.  
(4) Disconnect the FS 3P connector (red) on the control PCB and  
operate the drain pump. (Fig. 6-10b) Check the water flow  
through the transparent drain pipe and see if there is any  
leakage.  
Plastic container  
for water intake  
Drain pan outlet  
Water  
(Approx. 16 ounces (500m ) )  
Fig. 6-10a  
Control box  
)/$3  
(5) When the check of drainage is complete, reconnect the FS  
3P connector and remount the control cover.  
The drain pump will continue to  
operate for a minimum of 6 min-  
utes after the FS 3P connector is  
FS  
IND RC  
CAUTION  
Fig. 6-10b  
reconnected.  
must be within the range of 1/2"(13mm) to 23/32"(18mm). (Fig. 6-11)  
If not within this range, malfunction or other trouble may occur.  
A
3-6. How to Install the Ceiling Panel  
Indoor unit  
Checking the unit position  
A
Ceiling opening  
dimension  
(1) Check that the ceiling hole is 23-5/8" (600 mm) ꢀ 23-5/8"  
(600 mm) (Fig. 6-11)  
Ceiling side  
/DWFK  
(2) Confirm that the position of the indoor unit and the ceiling  
as shown in the diagram. If the positions of the ceiling sur-  
face and unit do not match, air leakage, water leakage, flap  
operation failure, or other problems may occur. (Fig. 6-11)  
Fig. 6-11  
Flap  
NO  
CAUTION  
ꢀ Never place the panel face-down. Neither hang it ver-  
Fig. 6-12  
Fig. 6-13  
tically nor place it on top of a projecting object. Plac-  
Ceiling panel  
Air-intake grille  
ing it face-down will damage the surface.  
ꢀ Do not touch the flap or apply force to it. (This may  
cause flap malfunction.) (Fig. 6-12)  
1
1
3-6-1. Before Installing the Ceiling Panel  
(1) Remove the air-intake grille and air filter from the ceiling  
panel.  
Air-intake grille hinge  
a) Press on and slide the two latches of the air-intake grille  
Fig. 6-14  
with your thumb in the direction shown by the arrow  
to open the grille. (Figs. 6-13 and 6-14)  
1
2
b) With the air-intake grille opened, remove the grille hinge  
from the ceiling panel by sliding it in the direction shown  
by the arrow 2 . (Fig. 6-15)  
Fig. 6-15  
9
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(2) Removing the corner cover and  
indicator cover  
a) While lightly pressing the cen-  
ter of the corner cover, pull up  
the tab for the screw hole. Use  
the same procedure to  
1
Corner cover  
Press  
remove the indicator cover.  
(Fig. 6-16)  
2 Pull up  
Indicator cover  
Fig. 6-16  
3-6-2. Installing the Ceiling Panel  
Temporary latches  
(1) Hang the temporary latches on the inside of the ceil-  
ing panel to the receptacle on the unit to temporarily  
attach the ceiling panel in place. (Fig. 6-17)  
Temporary  
latch  
ꢀ The ceiling panel must be installed in the correct  
direction relative to the unit. Align the REF. PIPE and  
DRAIN marks on the ceiling panel corner with the  
correct positions on the unit.  
Fig. 6-17  
Refrigerant tubing joint  
Drainage check  
(2) Align the panel installation holes and the unit screw  
holes. (Fig. 6-18)  
(3) Tighten the supplied special screws at the 4 panel  
installation locations so that the panel is attached  
tightly to the unit.  
ꢀ Check that the wiring connectors are not caught  
REF.PIPE mark  
Ceiling panel  
between the unit and the ceiling panel.  
DRAIN mark  
(4) Check that the panel is attached tightly to the ceiling.  
(Fig. 6-19)  
ꢀ At this time, make sure that there are no gaps  
between the unit and the ceiling panel, or between  
the ceiling panel and the ceiling surface.  
Panel installation hole  
(4 locations)  
Special screws  
ꢀ If there is a gap between the panel and the ceiling,  
leave the ceiling panel attached and make fine  
adjustments to the installation height of the unit to  
eliminate the gap with the ceiling.  
Fig. 6-18  
Do not allow  
gaps  
Indoor unit  
Ceiling surface  
Ceiling panel  
CAUTION  
Fig. 6-19  
If the screws are not sufficiently tightened,  
trouble such as that shown in the figure  
below may occur. Be sure to tighten  
the screws securely.  
If a gap remains between the ceiling  
surface and the ceiling panel even  
after the screws are tightened,  
The height of the unit can be adjusted from the ceiling  
panel corner hole, with the ceiling panel attached, to  
an extent that does not affect the unit levelness,  
the drain hose, or other elements.  
adjust the height of the unit again.  
Air leakage  
Air leakage from  
ceiling surface  
Staining  
Adjust so that there are no gaps.  
Condensation, water leakage  
Fig. 6-20  
10  
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3-6-3. Wiring the Ceiling Panel and the Indicator  
Drain pipe side  
(1) Remove the 2 screws from the control box cover, then open  
the cover. Be careful that the cover does not fall.  
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panel to the connector on the control PCB in the control box.  
(Fig. 6-21)  
Control box  
Refrigerant tube side  
(3) Connect the 7P IND and 4P RC wiring connector from the  
indicator to the connectors on the control PCB in the control  
box. (Fig. 6-21)  
Indicator cover  
Power box  
As to how to attach the indicator cover, refer to Fig.6-23.  
(4) Be sure to use the clamps to fasten the connector wires in  
place. (Fig. 6-21)  
Fig. 6-22  
Indoor unit  
Ceiling panel  
(5) Tighten the 2 cover screws to  
7P IND and 4P RC  
wiring connector  
Indicator  
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close the cover.  
Clamps  
ꢀ Check that the wiring  
connectors are not caught  
between the electrical  
4P  
5P  
component box and the cover.  
ꢀ If the indicator connector is  
not securely connected,  
the remote controller  
signal will not be  
ꢆ3ꢀ)/$3  
7P  
wiring connector  
received.  
ꢀ If the connectors are not  
connected, the auto flap will not  
operate. Be sure  
to connect them securely.  
7P IND and 4P RC wiring connector  
Control box  
Indicator  
* Pass the wiring connectors through the clamps to fasten them in place,  
as shown in the figure.  
Fig. 6-21  
3-6-4. How to Attach the Corner Cover and Air-Intake Grille  
A. Attaching the corner cover  
Pin  
(1) Check that the safety strap from the corner cover is fas-  
tened to the ceiling panel pin, as shown in the figure.  
(Fig. 6-23)  
(2) Use the supplied screws to attach the corner cover to the  
ceiling panel.  
B. Attaching the air-intake grille  
Place the corner cover so that the 3 tabs  
fit into the holes in the ceiling panel.  
Then fasten it in place with the supplied screws.  
ꢀ To install the air-intake grille, follow the steps for 3-6-1.  
Before Installing the Ceiling Panel in the reverse order.  
By rotating the air-intake grille, it is possible to attach the  
Fig. 6-23  
grille onto the ceiling panel  
from any of 4 directions.  
Hole for ceiling  
panel hook  
(Fig. 6-25)  
* The grille can be installed  
with these hinges facing  
in any of 4 directions.  
ꢀ When attaching the air-intake  
grille, be careful that the flap  
and the indicator wiring do  
not become caught.  
ꢀ Be sure to attach the safety  
Can be installed rotated 90  
cord that prevents the air-intake  
Hook that prevents  
the grille from  
dropping  
grille from dropping off to the  
ceiling panel unit as shown  
in Fig. 6-24.  
Fig. 6-24  
Fig. 6-25  
11  
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3-6-5. Checking After Installation  
ꢀ Check that there are no gaps between the unit and the ceiling panel, or between the ceiling panel and the ceiling sur-  
face. Gaps may cause water leakage and condensation.  
ꢀ Check that the wiring is securely connected.  
If it is not securely connected, the auto flap will not operate. In addition, water leakage and condensation may occur.  
3-6-6. When Removing the Ceiling Panel for Servicing  
When removing the ceiling panel for servicing, remove the air-intake grille and air filter, disconnect the flap and the indi-  
cator wiring connectors inside the control box, and then remove the 4 mounting screws.  
3-6-7. Adjusting the Auto Flap  
The air-direction flap on the ceiling panel outlet can be adjusted as follows.  
ꢀ Adjust the flap to the desired angle using the remote controller. The flap also has an automatic air-sweeping mecha-  
nism.  
NOTE  
ꢀ Never attempt to move the flap by hand.  
ꢀ Proper air flow depends on the location of the air conditioner, the layout of the room and furniture, etc. If cooling or  
heating seems inadequate, try changing the direction of the air flow.  
3-7. Wiring Instructions  
General precautions on wiring  
(1) Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely fol-  
lowing the wiring diagram.  
(2) Provide a power outlet to be used exclusively for each unit, with a power supply disconnect and circuit breaker for  
overcurrent protection provided in the exclusive line.  
(3) To prevent possible hazards due to insulation failure, the unit must be grounded.  
(4) Each wiring connection must be done tightly and in accordance with the wiring system diagram. Wrong wiring may  
cause the unit to misoperate or become damaged.  
(5) Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.  
(6) Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no responsibility  
for any damage or misoperation that occurs as a result of such unauthorized changes.  
3-8. Wiring Instructions for Inter-unit Connections  
(1) Remove the 1 screw from the terminal cover, then open the  
cover. Be careful that the cover does not fall.  
(2) Remove the 3 screws from the power box cover, then open  
the cover. Be careful that the cover does not fall.  
(3) Use the screw to securely fasten the ground wire from the  
outdoor unit in place.  
(4) Remove the transparent plastic cover from the 3P terminal  
plate.  
(5) While viewing the wiring diagram, connect the inter-unit and  
power supply line to terminals 1, 2 and 3 on the 3P terminal  
Power wiring  
plate.  
(Locally purchased)  
(6) Remount the transparent plastic cover onto the 3P terminal  
plate.  
Clamping strap  
Earth screw  
(7) Be sure to use the clamping strap to fasten the wires in place.  
Inter unit  
(8) Tighten the screws to remount the terminal and the power  
box cover.  
(Conduit)  
Fig. 8  
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  
ꢁ 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  
ꢁ 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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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. 33)  
a)Press and hold the HIGH POWER button and the  
1HR. TIMER button.  
Eꢅ7KHQꢀSUHVVꢀDQGꢀKROGꢀWKHꢀ$&/ ꢄ5HVHWꢅꢀEXWWRQꢀZLWK  
a pointed object such as the tip of a pen. After 5  
VHFRQGVꢃꢀUHOHDVHꢀWKHꢀ$&/ EXWWRQꢀILUVWꢁ  
ON/OFF  
operation  
button  
HIGH POWER  
button  
c)Then release the HIGH POWER and 1HR. TIMER  
buttons.  
1HR.  
TIMER  
button  
d)  
appears and “oP-1” blinking in the remote con-  
troller clock display area. (Fig. 34)  
(2) Start Cooling mode test run by pressing the ON/OFF  
operation button of the remote controller. (Fig. 33)  
‡ 7KLVꢀVWDUWVꢀWKHꢀIDQꢀSURGXFLQJꢀXQFRROHGꢀIRUFHGꢀDLU  
with the 3 indicator lamps (OPERATION lamp,  
TIMER lamp, and HIGH POWER lamp) on the  
main unit blinking. (Fig. 35)  
‡ $IWHUꢀꢎꢀPLQXWHVꢃꢀWKHꢀV\VWHPꢀVKLIWVꢀLQWRꢀFRROLQJ  
operation, and cool air will start to be felt. Cooling  
mode test run is unaffected by the room tempera-  
ture.  
$&/  
(Reset)  
button  
Fig. 33  
(3) Press the ON/OFF operation button of the remote  
controller again to stop the test run. (Fig. 33)  
ꢄꢋꢅ )LQDOO\ꢀSUHVVꢀWKHꢀ$&/ ꢄ5HVHWꢅꢀEXWWRQꢀRIꢀWKHꢀUHPRWH  
controller to release it from Test Run mode to return  
to normal mode. (Fig. 33)  
‡ ´ µꢀDQGꢀ´R3ꢂꢇµꢀZLOOꢀGLVDSSHDUꢀIURPꢀWKHꢀUHPRWH  
controller clock display area.  
NOTE  
Fig. 34  
Troubleshooting:  
In the event that the green OPERATION lamp is blinking  
upon powering up the system, an error condition exists.  
In this case, refer to the self-diagnostics procedure  
which can be seen by opening the air-intake grille.  
IMPORTANT  
$IWHUꢀWKHꢀWHVWꢀUXQꢀLVꢀFRPSOHWHGꢃꢀEHꢀVXUHꢀWRꢀSUHVVꢀWKHꢀ$&/  
(Reset) button to return to normal mode. The air condi-  
tioner will not operate correctly if this is not done.  
OPERATION button  
OPERATION lamp  
TIMER lamp  
HIGH POWER lamp  
REMOTE CONTROL receiver  
Fig. 35  
14  
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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 5/8" (4 16 mm)  
(included)  
To take out the remote controller, pull it forward.  
Fig. 36  
15  
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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 interfer-  
ence between remote controllers when 2 indoor units  
are installed near each other. The address is normally  
set to “A.” To set a different address, it is necessary to  
change the address on the second remote controller.  
NOTE  
Fig. 37  
Once changed, you cannot restore the original  
address setting of the air conditioner.  
(1) Switch on the power source.  
(2) Break the address-setting tab marked “A” on the  
second remote controller to change the address  
(Fig. 37). When the tab is removed, the address is  
automatically set to B (Fig. 38).  
(3) Press and hold the remote controller HIGH  
POWER button and 1HR. TIMER button. Then,  
SUHVVꢀDQGꢀKROGꢀWKHꢀ$&/ ꢄ5HVHWꢅꢀEXWWRQꢀZLWKꢀD  
pointed object such as the tip of a pen. After 5  
VHFRQGVꢃꢀUHOHDVHꢀWKHꢀ$&/ EXWWRQꢀILUVWꢃꢀWKHQ  
release the HIGH POWER and 1HR. TIMER but-  
tons. “oP-1” (Test Run) appears, blinking in the  
remote controller clock display area.  
ACL button  
Fig. 38  
(4) Each time the 1HR. TIMER button is pressed, the  
display changes as shown below. Press this but-  
ton 2 times to change the display to “oP-7”  
(Address setting). (Fig. 39)  
Test run mode  
Self-diagnostic mode  
Address setting mode  
ON/OFF  
operation  
button  
HIGH POWER  
button  
(5) “oP-7” has now been selected for address setting.  
1HR.  
(6) Press the ON/OFF operation button on the remote  
controller. (Fig. 39) Check that the “beep” signal-  
received sound is heard from the second indoor  
unit (approximately 5 times). The sound you hear  
is the signal that the remote controller address  
has been changed.  
TIMER  
button  
ꢄꢒꢅ )LQDOO\ꢀSUHVVꢀWKHꢀUHPRWHꢀFRQWUROOHUꢀ$&/ ꢄ5HVHWꢅ  
button to cancel the blinking “oP-7” display.  
(Fig. 39)  
Changing of the second remote controller address is  
now completed.  
$&/  
(Reset)  
button  
Fig. 39  
16  
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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.  
17  
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APPENDIX D Operating Instructions  
CZ-RD515U  
(852-6-4181-230-00-1)  
A-4  
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Operating Instructions  
Wired Remote Controller  
CZ-RD515U  
Model No.  
This wired remote controller is designed for  
both the “COOL/DRY/HEAT Model” and  
“COOL/DRY Model” indoor unit.  
Once the wired remote controller is  
connected, the wireless remote controller  
cannot be used.  
Before operating the unit, read these operating instructions thoroughly and keep them for future reference.  
Panasonic Corporation  
1006 Kadoma, Kadoma City, Osaka, Japan  
85264181230001  
CV6233187877  
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FEATURES  
• Microprocessor Controlled Operation  
The interior compartment of the remote controller contains several  
features to facilitate automatic operation, easy logically displayed  
for easy use.  
• Air Sweep Control  
This function moves a flap up and down in the air outlet, directing  
air in a sweeping motion around the room and providing comfort in  
every corner.  
• 24-Hour ON or OFF Timer  
This timer can be set to automatically turn the unit on or off at any  
time within a 24 hour period.  
• Automatic Restart Function for Power Failure  
Even when power failure occurs, preset programmed operation  
can be reactivated once power resumes.  
• Automatic Switching between Cooling and Heating  
This unit automatically switches between cooling operation and  
heating operation according to the difference between the room  
temperature and the temperature setting.  
(This function is available only for “Single use” of COOL/DRY/  
HEAT Model.)  
• 1-Hour OFF Timer  
This timer can be set to automatically turn off the unit at any time  
after one hour.  
• Night Setback  
This function saves energy by controlling operation to provide a  
quieter operating sound than normal.  
• Hot Start Heating System  
Right from the start, the air is warm and comfortable. This system  
prevents any cold blasts at the beginning while the heat pump is  
warming up, or even defrosting.  
• Automatic and 3-step Fan Speed  
Auto/High/Medium/Low  
(This function is available only for COOL/DRY/HEAT Model.)  
NOTE  
• Since the wired remote controller is designed to be commonly used for various air conditioners, some of the functions of the wireless  
remote controller supplied with the indoor unit cannot be used.  
• “Single use” means that only one indoor unit is connected with one outdoor unit in a one-unit-to-one-unit configuration.  
• “Multiple use” (i.e. Flexi-Multi system) means that two or more indoor units are connected with one outdoor unit in a multiple-unit-to-one-unit  
configuration.  
CONTENTS  
Page  
FEATURES......................................................................................................................................... 2  
PRODUCT INFORMATION ................................................................................................................ 2  
SAFETY PRECAUTIONS................................................................................................................... 2  
INSTALLATION LOCATION ................................................................................................................ 3  
ELECTRICAL REQUIREMENTS........................................................................................................3  
SAFETY INSTRUCTIONS.................................................................................................................. 3  
REMOTE CONTROLLER................................................................................................................... 4  
OPERATION WITH THE REMOTE CONTROLLER........................................................................... 7  
1. Automatic Operation (only for COOL/DRY/HEAT Model) .................................................... 7  
2. Manual Operation................................................................................................................ 7  
3. Adjusting the Fan Speed .....................................................................................................8  
4. Fan Only.............................................................................................................................. 8  
5. Night Setback Mode ............................................................................................................ 8  
SPECIAL REMARKS.......................................................................................................................... 8  
SETTING THE TIMER........................................................................................................................ 9  
USING THE 1-HOUR OFF TIMER...................................................................................................10  
ADJUSTING THE AIRFLOW DIRECTION .......................................................................................10  
PRODUCT INFORMATION  
SAFETY PRECAUTIONS  
If you have problems or questions concerning your wired  
remote controller, you will need the following information.  
The following symbols used in this manual, alert you  
to potentially dangerous conditions to users, service  
personnel or the appliance:  
Model No. __________________________________  
Date of purchase _____________________________  
Dealer’s address _____________________________  
Phone number _______________________________  
This symbol refers to a hazard or unsafe  
practice which can result in severe  
personal injury or death.  
This symbol refers to a hazard or unsafe  
practice which can result in personal  
CAUTION  
injury or product or property damage.  
2
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INSTALLATION LOCATION  
• To prevent possible hazards from insulation failure,  
the unit must be grounded.  
We recommend that this wired remote controller be  
installed properly by qualified installation technicians  
in accordance with the Installation Instructions  
provided with the unit.  
• Do not clean inside the indoor and outdoor units by users.  
Engage authorized dealer or specialist for cleaning.  
• In case of malfunction of this appliance, do not repair by  
yourself. Contact to the sales dealer or service dealer for a  
repair.  
• Refrigerant gas leakage may cause fire.  
• Do not install this wired remote  
controller where there are fumes or  
flammable gases, or in an extremely  
humid space such as a greenhouse.  
• Do not install the wired remote  
controller where excessively high  
heat-generating objects are placed.  
• For safety, be sure to turn the air conditioner off and  
also to disconnect the power before cleaning.  
• Pull off the power plug from a receptacle, or switch off the  
breaker, or switch off the power disconnecting mean to  
isolate the air conditioner from the main power supply in  
case of emergency.  
Avoid:  
To protect the air conditioner from heavy corrosion, avoid installing  
the outdoor unit where salty sea water can splash directly onto it or  
in sulphurous air near a spa.  
CAUTION  
• Do not turn the air conditioner on and off from the power  
mains switch. Use the ON/OFF operation button.  
• Do not stick anything into the air outlet of the outdoor unit.  
This is dangerous because the fan is rotating at high  
speed.  
• Do not touch the air inlet or the sharp aluminum fins  
of the outdoor unit. You may get injured.  
• Keep the fire alarm and the air outlet at least 1.5m away from  
the unit.  
ELECTRICAL REQUIREMENTS  
1. All wiring must conform to the local electrical codes.  
Consult your dealer or a qualified electrician for details.  
2. Each unit must be properly grounded with a ground (or  
earth) wire or through the supply wiring.  
3. Wiring must be done by a qualified electrician.  
• Do not let children play with the air conditioner.  
• Do not cool or heat the room too much if babies or invalids  
are present.  
NOTE  
• Do not sit or step on the unit. You may fall down  
accidentally.  
• Do not stick any object into the FAN CASE.  
You may be injured and the unit may be damaged.  
Pull off the power plug from a receptacle, or switch off the breaker, or  
switch off the power disconnecting mean to isolate the air conditioner  
from the main power supply when not in use for a long time.  
SAFETY INSTRUCTIONS  
• Read this Instruction Manual carefully before using  
this air conditioner. If you still have any difficulties  
or problems, consult your dealer for help.  
• This air conditioner is designed to give you  
comfortable room conditions. Use this only for its  
intended purpose as described in this Instruction  
Manual.  
NOTICE  
• This device complies with part 15 of the FCC Rules.  
Operation is subject to the following two conditions:  
(1) This device may not cause harmful interference, and (2) this  
device must accept any interference received, including  
interference that may cause undesired operation.  
• This equipment has been tested and found to comply with  
the limits for a Class B digital device, pursuant to part 15 of  
the FCC Rules.  
These limits are designed to provide reasonable protection  
against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency  
energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio  
communications. However, there is no guarantee that  
interference will not occur in a particular installation. If this  
equipment does cause harmful interference to radio or television  
reception, which can be determined by turning the equipment off  
and on, the user is encouraged to try to correct the interference  
by one or more of the following measures:  
• Confirm to authorized dealer or specialist on usage of  
specified refrigerant type.  
Using of refrigerant other than the specified type may cause  
product damage, burst and injury etc.  
• Never touch the unit with wet hands.  
• Never use or store gasoline or other flammable vapor or  
liquid near the air conditioner — it is very dangerous.  
• Do not use this appliance in a potentially explosive  
atmosphere.  
• This air conditioner has no ventilator for intaking fresh air  
from outdoors. You must open doors or windows frequently  
when you use gas or oil heating appliances in the same  
room, which consume a lot of oxygen from the air.  
Otherwise there is a risk of suffocation in an extreme case.  
• Do not swallow the battery.  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from  
that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for  
help.  
• After removing the battery from remote controller, keep it  
away from the reach of children. The battery can cause  
death by suffocation if swallowed.  
• FCC Caution: To assure continued compliance, follow the  
attached installation instructions. Any changes or modifications  
not expressly approved by the party responsible for compliance  
could void the user's authority to operate this equipment.  
3
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REMOTE CONTROLLER  
NOTE  
The descriptions on the AUTO ( ) or HEAT ( ) operation mode are only for the “COOL/DRY/HEAT Model,” and not for the  
“COOL/DRY Model.”  
Display  
Information on the operating conditions is displayed while the remote  
controller is switched on. If the unit is turned off, only the mode that was set  
previously is still displayed.  
Temperature setting buttons (TEMP.)  
Press the  
button to increase the set temperature.  
Press the  
button to reduce the set temperature.  
The temperature setting changes by 2 °F each time one of the TEMP. buttons  
is pressed.  
FAN SPEED selector button  
: The air conditioner automatically decides the fan speeds.  
: High fan speed  
: Medium fan speed  
: Low fan speed  
NIGHT SETBACK button  
For details, see “5. Night Setback Mode”. When you press this button in the  
HEAT, DRY or COOL mode, the  
mark appears in the display, and the  
remote controller will automatically adjust the set temperature to save energy.  
FLAP button  
Press this button either to select the setting of the airflow direction to one of  
the six possible positions manually or to select the sweep function which  
moves the flap up and down automatically.  
: The airflow direction can be set manually. (six positions)  
: The flap moves up and down automatically.  
NOTE  
When you press the FLAP button, the air flow direction will be changed one by  
one as follows.  
SWEEP  
ACL button (ALL CLEAR)  
Timer and Present Time setting buttons  
First, press the SET button to select the mode (ON, OFF and Present Time  
settings) you want.  
Each time you press the ‘‘HH’’ button, the hours advance by one.  
(PM0, PM1.....PM11, AM0, AM1.....AM11)  
When you press the ACL button while the  
operation button is ON, all settings are cleared.  
Press the ACL button if the air conditioner is not  
operating correctly.  
Each time you press the ‘‘MM’’ button, the minutes advance by one when  
setting Present Time and by ten when setting ON and OFF Time.  
SET button  
For details, see “SETTING THE TIMER”.  
Press this button to select the mode you want to program.  
4
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ON/OFF operation button  
This button is for turning the air conditioner on and off.  
MODE selector button  
Use this button to select AUTO, HEAT, DRY, COOL or FAN mode.  
(AUTO)  
: When this setting is selected, the air conditioner calculates the difference between the  
thermostat setting and the room temperature and automatically switches to the ‘‘COOL’’ or  
‘‘HEAT’’ mode as appropriate. (This function is available only for “Single use” of COOL/DRY/  
HEAT Model.)  
(HEAT)  
(DRY)  
(COOL)  
(FAN)  
: The air conditioner makes the room warmer.  
: The air conditioner reduces the humidity in the room.  
: The air conditioner makes the room cooler.  
: The air conditioner works only as a circulation fan except for “Multiple use” of COOL/DRY/  
HEAT Model.  
1 HR. TIMER button (1-HOUR OFF TIMER)  
: When you press this button, regardless of whether the unit is operating or stopping, the unit operates for  
one hour and then shuts down.  
TIMER SELECT button  
No display :The timer does not operate.  
:
:
The air conditioner starts at the set time.  
The air conditioner stops at the set time.  
:
The air conditioner stops and starts, or starts and stops, at the set times every day.  
Sensor  
A temperature sensor inside the remote controller senses the room temperature.  
SENSOR button  
When you press this button (use a small-tipped object such as a ballpoint pen), the  
mark will disappear at the  
display. And the room temperature is detected by the sensor which is built into the remote controller and the air  
conditioner is controlled accordingly.  
NOTE  
If the remote controller is located near a heat source, such as a space heater or in direct sunlight, press the  
SENSOR button to switch to the sensor on the indoor unit.  
NOTE  
The indoor fan runs continuously when the system is in normal operation. It does not turn off when the desired room temperature is  
reached. If Night Set Back mode is selected, the fan will turn off intermittently during cooling operation in order to control air flow.  
5
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REMOTE CONTROLLER (DISPLAY)  
Displayed when indoor unit sensor  
is in use  
Displayed when operating NIGHT  
SETBACK mode  
Displayed when setting  
temperature  
Displayed when temperature is  
shown  
Displayed when setting timer  
Symbols  
(3) Temperature setting  
(1) Operation mode  
60 – 86 °F..............................  
AUTO .....................................  
(only for COOL/DRY/HEAT  
Model)  
HEAT......................................  
(only for COOL/DRY/HEAT  
Model)  
When set to 80 °F  
temperature indication ...........  
(4) Timer  
24-hour clock with ON/OFF  
program Timer .......................  
MILD DRY ..............................  
COOL.....................................  
FAN ........................................  
ON Timer. ..............................  
OFF Timer. ............................  
1-hour OFF Timer..................  
(5) NIGHT SETBACK..................  
(2) Fan speed  
Automatic operation ...............  
HIGH .....................................  
MEDIUM.................................  
LOW.......................................  
(6) Flap angle indication..............  
Sweep indication....................  
6
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OPERATION WITH THE REMOTE CONTROLLER  
1. Automatic Operation  
2. Manual Operation  
(only for COOL/DRY/HEAT Model)  
• Single use  
This unit automatically switches between cooling operation and  
heating operation according to the difference between the room  
temperature and the temperature setting.  
• Multiple use  
The air conditioner calculates the difference between the  
thermostat setting and room temperature, and automatically  
determines the mode to operate under cooling or heating. Then,  
the air conditioner continuously operates under the mode selected  
at initial operation.  
STEP 2  
STEP 3  
STEP 1  
STEP 4  
STEP 5  
Check that the circuit breaker on the power panel is  
turned on.  
NOTE  
STEP 2  
STEP 1  
If the automatic operation settings of the unit do not  
meet your needs, press the setting buttons as  
described below and change the settings as desired.  
STEP 1  
Press the MODE selector button  
and select the desired mode.  
For heating operation  
Check that the circuit breaker on the power panel is  
turned on.  
o
o
o
o
NOTE  
For dehumidifying operation  
For cooling operation  
For fan only operation  
(No Fan mode in “Multiple use” of  
COOL/DRY/HEAT Model)  
Once  
mode is selected and the unit is preset by  
following the steps below, you can have the air  
conditioner automatically bring the room to the desired  
temperature simply by pressing the ON/OFF operation  
button.  
STEP 2  
STEP 3  
To start the air conditioner, press the ON/  
OFF operation button.  
Press the TEMP. setting buttons to change  
the temperature setting to the desired  
temperature.  
STEP 1  
STEP 2  
Press the MODE selector button to  
Press the ON/OFF operation button.  
.
Adjustable temperature range:  
86 °F max.  
60 °F min.  
To stop the air conditioner, press the ON/OFF operation  
button again.  
STEP 4  
STEP 5  
Set the FAN SPEED selector button to the  
setting you want.  
Press the FLAP button and set the airflow  
direction as desired.  
(Refer to “ADJUSTING THE AIRFLOW  
DIRECTION” on page 10.)  
To change the temperature setting; press the  
temperature setting buttons and change the setting to  
the desired temperature.  
NOTE  
To stop the air conditioner, press the ON/OFF  
operation button again.  
• Choose the best position in the room for the remote  
controller, which also acts as the sensor for room  
comfort and transmits the operating instructions.  
Once you’ve found this best position, always keep the  
remote controller there.  
NOTE  
• This appliance has a built-in 5-minute time delay  
circuit to ensure reliable operation. When the  
operation button is pressed, the compressor will start  
running within three minutes. In the event of power  
failure, the unit will stop.  
• The display on the remote controller shows the setting  
temperature and not the room temperature.  
• When multiple indoor units are used and units in other  
rooms are already operating, they will be operating  
with the same mode as the operating indoor units.  
(only for “Multiple use” of COOL/DRY/HEAT Model)  
7
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A. In Cooling and DRY Mode: ( and  
)
3. Adjusting the Fan Speed  
A. Automatic fan speed  
Simply set the FAN SPEED selector button to the  
position.  
This automatically sets the best fan speed for the room  
temperature.  
B. Manual fan speed  
When the night setback mode is selected, the air conditioner  
automatically raises the temperature setting 2 °F when 30 minutes  
have passed after the selection was made, and then another 2 °F  
after another 30 minutes have passed, regardless of the indoor  
temperature when night setback was selected. This enables you  
to save energy without sacrificing comfort. This function is  
convenient when gentle cooling is needed.  
If you want to adjust fan speed manually during operation,  
just set the FAN SPEED selector button as desired. [  
, or  
,
]
2 °F  
4. Fan Only  
Setting  
temperature  
2 °F  
30 min.  
30 min.  
STEP 2  
STEP 1  
Press the NIGHT  
SETBACK button  
Time  
STEP 3  
B. In Heating Mode: (  
)
(only for COOL/DRY/HEAT Model)  
When the night setback mode is selected, the air conditioner  
automatically lowers the temperature setting 4 °F when 30  
minutes have passed after the selection was made, and then  
another 4 °F after another 30 minutes have passed, regardless of  
the indoor temperature when night setback was selected. This  
enables you to save energy without sacrificing comfort. This  
function is convenient when gentle heating is needed.  
If you want to circulate air without any temperature  
control, follow these steps:  
STEP 1  
Press the MODE selector button to switch to  
the fan mode  
Setting  
temperature  
4 °F  
.
4 °F  
STEP 2  
STEP 3  
Press the ON/OFF operation button.  
Press the FAN SPEED selector button to  
select the fan speed of your choice (  
or ).  
,
30 min.  
30 min.  
Time  
Press the NIGHT  
SETBACK button  
There is no FAN only function in “Multiple use” of  
COOL/DRY/HEAT Model.  
NOTE  
5. Night Setback Mode  
SPECIAL REMARKS  
Power failure during operation  
In the event of power failure, the unit will stop. When the power is  
resumed within 8 hours, the unit will restart automatically in  
approximately five minutes, or 15 minutes in “Multiple use” of COOL/  
DRY/HEAT Model on AUTO mode by the remote controller.  
Remote Controller  
The remote controller sends the setting condition to the air  
conditioner regularly at five minute intervals.  
Remote Controller Display  
If the display malfunctions, press the ACL button.  
This resets the remote controller back to the initial settings.  
Make the settings again.  
Night Setback Mode is used for saving energy.  
Press the NIGHT SETBACK button while unit is operating.  
The  
mark appears in the display.  
To release the night setback function, press the NIGHT SETBACK  
button again.  
8
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3. How to set the ON time  
(Example) To start operation at 7:10 am.  
SETTING THE TIMER  
ON TIME  
Present time  
Indication  
Operation  
1. Press the SET button once.  
The timer  
indication alone  
flashes and the previous set-  
time is only displayed.  
2. • Press the HH button until  
AM 7 is displayed.  
The display will change  
automatically back to show the  
present time after about 10 sec.  
1. How to set the present time  
(Example) To set to 9:10 pm.  
• Press the MM button until  
10 is displayed.  
3. Press the TIMER SELECT  
The present time and  
displayed.  
are  
button once to set ON time.  
To cancel the setting, press the TIMER SELECT button three times.  
4. How to set daily ON/OFF repeat timer  
Operation  
Indication  
(Example) To start operation at 7:10 am. and stop the air conditioner  
at 11:30 pm.  
1. Press the SET button three  
The time indication alone  
flashes.  
times.  
2. • Press the HH button until  
PM 9 is displayed.  
The display will flash for 10 sec.  
and automatically stop flashing  
except for the “ : ” symbol.  
• Press the MM button until  
10 is displayed.  
2. How to set the OFF time  
(Example) To stop the air conditioner at 11:30 pm.  
Present time  
ON TIME  
OFF TIME  
Programmed  
daily ON / OFF  
OFF TIME  
Present time  
9:10 pm.  
Present time  
7:10 am.  
ON  
11:30pm.  
OFF  
Operation  
Indication  
1. Press the SET button twice.  
The timer  
indication alone  
flashes and the previous set-  
time is only displayed.  
2. • Press the HH button until  
PM 11 is displayed.  
The display will change  
automatically back to show the  
present time after about 10 sec.  
Operation  
Indication  
Set the timer ON/OFF times as The present time PM 9:10 and  
shown in 2 and 3.  
• Press the MM button until  
30 is displayed.  
are displayed.  
3. Press the TIMER SELECT  
The present time and  
button twice to set OFF time. displayed.  
are  
To cancel the setting, press the TIMER SELECT button once.  
NOTE  
To cancel the setting, press the TIMER SELECT button twice.  
You can check the timer ON/OFF times after you have set them by  
pressing the SET button.  
5. Backup function  
Even if the main power supply to the unit is turned off, the remote  
controller will store the previous settings in its internal memory for up  
to 8 hours. If the power is not turned back on within 8 hours, the  
previous settings will be lost. In this case, the mode settings must be  
reset by the user.  
9
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USING THE 1-HOUR OFF  
TIMER  
ADJUSTING THE AIRFLOW  
DIRECTION  
The vertical airflow can be adjusted by moving the flap with the  
remote controller. Do not move the flap with your hands. Confirm that  
the remote controller has been turned on. Use the FLAP button to  
set either the sweep function or one of the six airflow direction  
settings.  
1. 1-Hour OFF Timer  
This function causes the unit to operate for one hour and then  
stop, regardless of whether the unit is on or off when this  
button is pressed.  
A. Sweep function  
The flap starts moving  
up and down to deliver  
air over the sweep  
range.  
The  
indicator in the display indicates that this function is  
operating.  
Setting procedure:  
Regardless of whether the unit is operating or stopped, press the 1  
HR. TIMER button.  
B. Setting the airflow manually  
appears in the display.  
SWEEP  
Referring to the above  
Cancellation procedure:  
Press the ON/OFF operation button to turn the unit off, wait for the  
unit to stop operating, and then press the ON/OFF operation button  
again.  
The 1-Hour Timer function is now cancelled and the unit operates  
normally.  
illustration, use the  
FLAP button to set the  
airflow direction within  
the range used during  
the heating, cooling, or  
dehumidifying  
COOL  
DRY  
FAN  
SWEEP  
HEAT  
operation.  
NOTE  
• If, while the 1-Hour Timer function is operating, the 1HR. TIMER  
button is pressed once to cancel the function and then again, the  
unit continues to operate for one hour from that point in time and  
then stops.  
• It is not possible to use the OFF Timer and 1-Hour OFF Timer  
together. Whichever function is set last takes precedence. If the 1  
HR. TIMER button is pressed while the TIMER OFF function  
operates, the OFF Timer is cancelled and the unit will stop  
operating one hour later.  
NOTE  
• The flap automatically closes when the unit is off.  
• During the heating operation, the fan speed will be very low and the  
flap will be in the horizontal position (position ) until the air being  
blown out of the unit begins to warm. Once the air warms up, the  
flap position and fan speed change to the settings specified with  
the remote controller.  
CAUTION  
2. Operation together with the daily ON/OFF  
repeat timer  
• Use the FLAP button on the remote controller to adjust the  
position of the flap. If you move the flap by hand, the flap  
position according to the remote controller and the actual  
flap position may no longer match. If this should happen,  
shut off the unit, wait for the flap to close, and then turn on  
the unit again; the flap position will now be normal again.  
• Do not have the flap pointed down during cooling operation.  
Condensation may begin to form around the air vent and drip  
down.  
The 1-Hour OFF Timer setting is given priority over the DAILY ON/  
OFF REPEAT setting.  
10  
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APPENDIX E INSTALLATION INSTRUCTIONS  
CZ-RD515U  
(852-6-4190-592-00-0)  
A-5  
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INSTALLATION INSTRUCTIONS  
Wired Remote Controller  
‡ In order to install this wired remote controller onto a wall-mounted model, the connection kit  
IMPORTANT  
(CZ-RC515U or CZ-RC515UA), which must be purchased separately, is required.  
‡ Once the wired remote controller is connected, the wireless remote controller cannot be used.  
Table 1  
Parts supplied with the remote controller  
See Table 1.  
Parts  
Figure  
Q'ty  
Parts  
Figure  
Q'ty  
26.2 ft. (8m)  
Wired  
remote  
controller  
Wire  
harness  
Remote controller installation guidelines  
1
1
Installation location  
‡ Mount the remote controller 3.3 to 4.9 ft. (1 to 1.5  
meters) off the floor where it can sense the average  
temperature of the room.  
5/32 15/16"  
(4 25mm)  
Machine  
screws  
Instruction  
manual  
2
2
2
1
1
‡ Do not mount the remote controller in a place  
exposed to direct sunlight or where it is exposed to  
outside air such as near a window.  
5/32 15/16"  
(4 25mm)  
Tapping  
screws  
Installation  
Instructions  
‡ Do not mount the remote controller behind a curtain or  
other object so that it is separated from the air circula-  
tion of the room.  
‡ Mount the remote controller inside the room being air  
Spacers  
conditioned.  
Switching the room temperature sensor  
Room temperature sensors are separately incorporated in both the indoor unit and the remote controller. Either sensor can  
be used to sense the room temperature. The indoor unit sensor is usually used.  
If you wish the remote controller to sense the room temperature, press the SENSOR button with a ballpoint pen or tool with  
a small tip. (Refer to Fig. 9 on page 4 to locate the SENSOR button.)  
How to install the remote controller  
IMPORTANT  
‡ The remote controller is set to “Cool/Dry/Heat model” at  
the time of shipment from the factory. If the purchased air  
conditioner is a COOL/DRY model, follow the instructions  
on the label and change the switch on the reverse side of  
the remote controller unit to “Cool/Dry model”. (Fig. 1)  
‡ The remote controller is also set to “Single” at the time of  
shipment from the factory. For multiple use, set the  
switch on the reverse side of the remote controller unit to  
“Multi”. (Fig. 1)  
‡ After all work is completed, if any switches have been  
changed, then be sure to press the ACL (Reset) button.  
(Refer to Fig. 9 on page 4 to locate the ACL (Reset) but-  
ton.)  
Fig. 1  
CV6233187884  
85264190592000 2011  
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A. Installing with in-wall junction box  
In-wall junction box (locally purchased)  
(1) Install the junction box (locally purchased) into the wall.  
(Figs. 2-a and 3)  
(2) Pass the wire harness through the junction box and  
conduit. (Fig. 3)  
Tab  
(3) Insert a flathead screwdriver into the 5 tab locations  
and disconnect the back plate of the remote controller by  
lifting up slightly. (Fig. 2-b)  
2-3/8"  
(60mm)  
Back  
plate  
The tabs are thin; take care not to chip them.  
Fig. 2-a  
Fig. 2-b  
(4) Pass the wire harness connector through the cord open-  
ing on the back plate of the remote controller.  
from the indoor unit  
Use nippers or a similar tool to cut out the slots for the  
remote controller back plate screws. Insert the spacers  
and use the machine screws to install the remote con-  
troller back plate. (Fig. 3)  
In-wall junction box  
(5) Insert the connector into the PCB of the remote controller  
unit, and wrap the wire harness around the hook. (Fig. 4)  
Opening  
Wire harness  
(6) Store the excess wire harness inside the junction box,  
then hook the remote controller unit onto the top of the  
back plate and install the remote controller unit.  
(7) To remove the remote controller unit after it has been  
installed, insert a flathead screwdriver into the slot on the  
bottom of the case and turn it. (Fig. 5)  
Wall  
Spacers  
Back plate  
Machine  
screws  
B. Installing directly onto the wall  
Remote  
controller  
(1) Insert a flathead screwdriver into the 5 tab locations and  
disconnect the back plate of the remote controller by lift-  
ing up slightly. (Fig. 2-b)  
Fig. 3  
The tabs are thin; take care not to chip them.  
PCB  
(2) Use tapping screws to directly fasten the remote con-  
troller back plate onto the wall. (Fig. 6)  
(3) Insert the connector into the PCB of the remote controller  
unit, and wrap the wire harness around the hook. (Fig. 4)  
Hook  
Slot  
(4) Use nippers or a similar tool to cut out the slot on the top  
of the remote controller unit. Pass the wire harness  
through the slot, then hook the remote controller unit  
onto the top of the back plate and install the remote con-  
troller unit.  
Connector  
Fig. 4  
Fig. 5  
(5) In order to conceal the exposed wiring, use a wire cover  
(locally purchased) or similar means.  
NOTE  
Wire harness  
Cut out  
‡ When installing the remote controller back plate, be sure  
that it is flat and straight. Do not over-tighten the installa-  
tion screws.  
‡ Install the remote controller away from all sources of elec-  
Wall  
trical noise.  
Back plate  
‡ Install a noise filter or take other appropriate action if elec-  
Tapping  
screws  
trical noise affects the power supply circuit of the unit.  
Remote  
controller  
Fig. 6  
2
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7P IND and 4P RC  
wiring connector  
5P FLAP  
wiring connector  
How to wire the remote controller  
Ceiling  
panel  
(1) Turn OFF the power and remove the ceiling panel  
air-intake grille. (Refer to 3-6-1 Before Installing the  
Ceiling Panel in the Installation Instructions supplied  
with the indoor unit.)  
(2) Remove the 3 power box cover screws and 2 control  
box cover screws, then remove both covers. At this  
time, take care not to drop the covers. (Fig. 7)  
Control  
box  
cover  
(3) Disconnect the 7P (IND) terminal and 4P (RC) termi-  
nal of the 7P IND and 4P RC wiring connectors and  
the 5P terminal of the 5P FLAP wiring connector  
from the control box PCB connectors (IND, RC,  
FLAP). Disconnect each wiring connector from the  
clamp that fastens it. (Fig. 7)  
Power box cover  
Indicator  
(4) Remove the ceiling panel. (To remove the ceiling  
panel, follow the steps for 3-6 How to Install the  
Ceiling Panel in the reverse order. Refer to the  
Installation Instructions supplied with the indoor unit.)  
Fig. 7  
Fig. 8-a  
Indicator  
7P IND and 4P RC  
wiring connector  
5P FLAP  
7P IND and 4P RC  
wiring connector wiring connector  
Ceiling  
panel  
Clamps  
Wire harness  
Remote  
controller  
4P  
7P  
5P FLAP  
wiring  
connector  
Control PCB  
Putty  
Terminal cover  
Wire harness  
Indicator  
Wire harness  
Clamping strap  
Fig. 8-b  
Fig. 8  
(5) Remove the terminal cover screws, then remove the cover. At this time, take care not to drop the cover. (Fig. 8)  
(6) Pull in the wire harness from the remote controller as shown in Fig. 8-b.  
‡ Remove the putty before wiring. After wiring, make sure to restore the putty.  
(7) Insert the wire harness 4P terminal into the control box PCB connector (RC). (Fig. 8-a)  
(8) Install the terminal cover. Then install the ceiling panel. (Refer to 3-6 How to Install the Ceiling Panel in the  
Installation Instructions supplied with the indoor unit.)  
(9) Insert only the 7P (IND) terminal of the 7P IND and 4P RC wiring connector into the connector (IND) on the control  
box PCB. Store the 4P terminal inside the control box. (Fig. 8-a)  
(10) Next, insert the 5P terminal of the 5P FLAP wiring connector into the connector (FLAP) on the control box PCB.  
(Fig. 8-a)  
(11) When the connections are completed, fasten the wire harness and each wiring connector with the clamps.  
(12) Install the power box cover and control box cover.  
(13) Install the air-intake grille. (Refer to 3-6 How to Install the Ceiling Panel in the Installation Instructions supplied  
with the indoor unit.)  
3
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How to Test Run the Air Conditioner  
After turning on the power of the air conditioner, use the  
remote controller and follow the steps below to conduct  
the test run.  
(1) Set the remote controller in Test Run mode. (Fig. 9)  
a)Press and hold the NIGHT SETBACK button and  
the 1HR. TIMER button.  
ON/OFF  
operation button  
b)Then press and hold the ACL (Reset) button with  
a pointed object such as the tip of a pen. After 5  
seconds, release the ACL button first.  
NIGHT SETBACK  
button  
1 HR.TIMER  
button  
c)Then release the NIGHT SETBACK and 1HR.  
TIMER buttons.  
d)  
appears and “oP-1” blinking in the remote  
controller clock display area. (Fig. 10)  
(2) Start Cooling mode test run by pressing the ON/OFF  
operation button of the remote controller. (Fig. 9)  
ACL (Reset)  
button  
SENSOR button  
‡ This starts the fan producing uncooled forced air  
with the 3 indicator lamps (OPERATION lamp,  
TIMER lamp, and HIGH POWER lamp) on the  
main unit blinking. (Fig. 11)  
Fig. 9  
‡ After 3 minutes, the system shifts into cooling  
operation, and cool air will start to be felt. Cooling  
mode test run is unaffected by the room tempera-  
ture.  
(3) Press the ON/OFF operation button of the remote  
controller again to stop the test run. (Fig. 9)  
Fig. 10  
(4) Finally press the ACL (Reset) button of the remote  
controller to release it from Test Run mode to return  
to normal mode. (Fig. 9)  
‡ “ ” and “oP-1” will disappear from the remote  
controller clock display area.  
NOTE  
Troubleshooting:  
In the event that the green OPERATION lamp is blink-  
ing upon powering up the system, an error condition  
exists. In this case, refer to the self-diagnostics proce-  
dure which can be seen by opening the air-intake grille.  
OPERATION button  
OPERATION lamp  
TIMER lamp  
HIGH POWER lamp  
IMPORTANT  
REMOTE CONTROL receiver  
Fig. 11  
After the test run is completed, be sure to press the  
ACL (Reset) button to return to normal mode. The air  
conditioner will not operate correctly if this is not done.  
WI1011-0  
Printed in China  
4
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DC1111-0  
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