TECHNICAL & SERVICE MANUAL
KS1872 + C1872
+ CL1872
FILE NO.
KS2472 + C2472
+ CL2472
Destination: North America
DC INVERTER SPLIT SYSTEM AIR CONDITIONER
Indoor Model No. Product Code No.
Outdoor Model No. Product Code No.
KS1872
KS2472
1 852 099 83
1 852 099 84
C1872
C2472
1 852 330 36
1 852 330 37
1 852 330 40
1 852 330 41
CL1872
CL2472
Indoor Unit
Outdoor Unit
AIR CO
NDITIONER
KS1872
KS2472
C1872
CL1872
IMPORTANT
These air conditioners employ new
refrigerant R410A.
Pay special attention when
servicing the unit.
C2472
CL2472
REFERENCE NO. SM700663
Table of Contents
Page
5
1. OPERATING RANGE ...................................................................................................................
2. SPECIFICATIONS
2-1. Unit Specifications .............................................................................................................
6
2-2. Major Component Specifications ....................................................................................... 14
2-3. Other Component Specifications ....................................................................................... 20
3. DIMENSIONAL DATA ..................................................................................................................... 21
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram ................................................................................................... 24
5. PERFORMANCE DATA
5-1. Temperature Charts ............................................................................................................ 25
5-2. Air Throw Distance Charts ................................................................................................. 29
6. ELECTRICAL DATA
6-1. Electrical Characteristics .................................................................................................... 31
6-2. Electric Wiring Diagrams .................................................................................................... 33
7. INSTALLATION INSTRUCTIONS
7-1. Installation Site Selection ................................................................................................... 37
7-2. Recommended Wire Length and Diameter ........................................................................ 39
7-3. Remote Control Unit Installation Position ........................................................................... 40
7-4. How to Test Run the Air Conditioner ................................................................................... 41
7-5. Remove the Grille to Install the Indoor Unit ........................................................................ 42
8. MAINTENANCE
8-1. Address Setting of the Remote Control Unit ....................................................................... 43
8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit .................................. 44
9. FUNCTIONS
9-1. Operation Functions ........................................................................................................... 45
9-2. Protective Functions ........................................................................................................... 47
3
Page
10.TROUBLESHOOTING
10-1. Precautions before Performing Inspection or Repair ........................................................... 48
10-2. Method of Self-Diagnostics ................................................................................................. 48
10-3. Checking the Indoor and Outdoor Units .............................................................................. 51
10-4. Trouble Diagnosis of Fan Motor .......................................................................................... 52
10-5. Noise Malfunction and Electromagnetic Interference .......................................................... 54
11. CHECKING ELECTRICAL COMPONENTS
11-1. Measurement of Insulation Resistance ............................................................................... 55
11-2. Checking Continuity of Fuse on PCB Ass'y ......................................................................... 56
12. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
12-1. Characteristics of New Refrigerant R410A ......................................................................... 57
12-2. Checklist before Servicing ................................................................................................... 58
12-3. Tools Specifically for R410A ................................................................................................ 59
12-4. Tubing Installation Procedures ............................................................................................ 59
12-5. In Case of Compressor Malfunction .................................................................................... 60
12-6. In Case Refrigerant is Leaking ............................................................................................ 62
12-7. Charging Additional Refrigerant .......................................................................................... 63
12-8. Retro-Fitting Existing Systems ............................................................................................ 63
APPENDIX INSTRUCTION MANUAL ............................................................................................ 64
4
1. OPERATING RANGE
Models : KS1872 + C1872
KS2472 + C2472
Temperature
Indoor Air Intake Temp.
95 °F D.B. / 71 °F W.B.
67 °F D.B. / 57 °F W.B.
Outdoor Air Intake Temp.
115 °F D.B.
Maximum
Cooling
Minimum
67 °F D.B.
Models : KS1872 + CL1872
KS2472 + CL2472
Temperature
Indoor Air Intake Temp.
95 °F D.B. / 71 °F W.B.
67 °F D.B. / 57 °F W.B.
Outdoor Air Intake Temp.
115 °F D.B.
Maximum
Cooling
Minimum
0 °F D.B.
5
2. SPECIFICATIONS
2-1. Unit Specifications
Indoor Unit
KS1872
Outdoor Unit C1872
<
230V
>
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
17,600 ( 4,100 to 17,700 )
5.15 ( 1.2 to 5.2 )
524 (890)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
7.0 ( 1.2 to 7.0 )
Power Input
W
1,500 ( 250 to 1,500 )
Power Factor
SEER
%
BTU/W
93
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi,Me,Lo)
Manual
Vertical
Auto
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1.3)
Electric Expansion Valve
42 / 38 / 30 / 28
51
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
1/2 (12.7)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
26-3/8 (670)
34-21/32 (880)
11-7/32 (285)
29-1/8 (740)
39-27/32 (1,012)
14-31/32 (380)
90.4 (41.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
99.2 (45.0)
9.89 (0.28)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
6
Indoor Unit
KS1872
Outdoor Unit C1872
<
208V
>
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
17,600 ( 4,100 to 17,700 )
5.15 ( 1.2 to 5.2 )
524 (890)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
7.7 ( 1.2 to 7.7 )
Power Input
W
1,500 ( 250 to 1,500 )
Power Factor
SEER
%
BTU/W
94
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi,Me,Lo)
Manual
Vertical
Auto
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Rotary (Inverter)
R410A / 2.87 (1.3)
Electric Expansion Valve
42 / 38 / 30 / 28
51
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
25 (7.5)
1/4 (6.35)
1/2 (12.7)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
26-3/8 (670)
34-21/32 (880)
11-7/32 (285)
29-1/8 (740)
39-27/32 (1,012)
14-31/32 (380)
90.4 (41.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
99.2 (45.0)
9.89 (0.28)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
7
Indoor Unit
KS2472
Outdoor Unit C2472
<
230V
>
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
24,200 ( 4,100 to 24,200 )
7.1 ( 1.2 to 7.1 )
600 (1,020)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
10.8 ( 1.3 to 10.8 )
Power Input
W
2,355 ( 280 to 2,355 )
Power Factor
SEER
%
BTU/W
95
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi,Me,Lo)
Manual
Vertical
Auto
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 4.30 (1.95)
Electric Expansion Valve
47 / 44 / 41 / 30
55
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
5/8 (15.88)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
29-1/8 (740)
35-7/16 (900)
12-19/32 (320)
33-27/32 (860)
40-5/8 (1,032)
16-1/4 (413)
119.0 (54.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
127.9 (58.0)
12.71 (0.36)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
8
Indoor Unit
KS2472
Outdoor Unit C2472
<
208V
>
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
24,200 ( 4,100 to 24,200 )
7.1 ( 1.2 to 7.1 )
600 (1,020)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
12.1 ( 1.3 to 12.1 )
Power Input
W
2,355 ( 280 to 2,350 )
Power Factor
SEER
%
BTU/W
94
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi,Me,Lo)
Manual
Vertical
Auto
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 4.30 (1.95)
Electric Expansion Valve
47 / 44 / 41 / 30
55
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
5/8 (15.88)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
29-1/8 (740)
35-7/16 (900)
12-19/32 (320)
33-27/32 (860)
40-5/8 (1,032)
16-1/4 (413)
119.0 (54.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
127.9 (58.0)
12.71 (0.36)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
9
Indoor Unit
KS1872
Outdoor Unit CL1872
<
230V
>
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
17,600 ( 4,100 to 17,700 )
5.15 ( 1.2 to 5.2 )
524 (890)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
7.0 ( 1.2 to 7.0 )
Power Input
W
1,500 ( 250 to 1,500 )
Power Factor
SEER
%
BTU/W
93
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Manual
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1.3)
Electric Expansion Valve
42 / 38 / 30 / 28
51
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
1/2 (12.7)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
26-3/8 (670)
34-21/32 (880)
11-7/32 (285)
29-1/8 (740)
39-27/32 (1,012)
14-31/32 (380)
90.4 (41.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
99.2 (45.0)
9.89 (0.28)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
10
Indoor Unit
KS1872
Outdoor Unit CL1872
<
208V
>
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
17,600 ( 4,100 to 17,700 )
5.15 ( 1.2 to 5.2 )
524 (890)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
7.7 ( 1.2 to 7.7 )
Power Input
W
1,500 ( 250 to 1,500 )
Power Factor
SEER
%
BTU/W
94
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Manual
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 2.87 (1.3)
Electric Expansion Valve
42 / 38 / 30 / 28
51
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
1/2 (12.7)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
26-3/8 (670)
34-21/32 (880)
11-7/32 (285)
29-1/8 (740)
39-27/32 (1,012)
14-31/32 (380)
90.4 (41.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
99.2 (45.0)
9.89 (0.28)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
11
Indoor Unit
KS2472
Outdoor Unit CL2472
<
230V
>
Voltage Rating
230V Single-Phase 60Hz
Performance
Cooling
24,200 ( 4,100 to 24,200 )
7.1 ( 1.2 to 7.1 )
600 (1,020)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
10.8 ( 1.3 to 10.8 )
Power Input
W
2,355 ( 280 to 2,355 )
Power Factor
SEER
%
BTU/W
95
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Manual
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 4.30 (1.95)
Electric Expansion Valve
47 / 44 / 41 / 30
55
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
5/8 (15.88)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
29-1/8 (740)
35-7/16 (900)
12-19/32 (320)
33-27/32 (860)
40-5/8 (1,032)
16-1/4 (413)
119.0 (54.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
127.9 (58.0)
12.71 (0.36)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
12
Indoor Unit
KS2472
Outdoor Unit CL2472
<
208V
>
Voltage Rating
208V Single-Phase 60Hz
Performance
Cooling
24,200 ( 4,100 to 24,200 )
7.1 ( 1.2 to 7.1 )
600 (1,020)
Capacity
BTU/h
kW
ft3/min (m3/h)
Pints/h
Air Circulation (High)
Moisture Removal (High)
4.89
Electrical Rating
Cooling
Available Voltage Range
Running Amperes
V
A
187 to 253
12.1 ( 1.3 to 12.1 )
Power Input
W
2,355 ( 280 to 2,355 )
Power Factor
SEER
%
BTU/W
94
16
Compressor Locked Rotor Amperes
Fuse or Circuit Breaker Capacity
A
A
17.5
20
Features
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
Airflow Direction (Indoor)
Indoor / Outdoor
Horizontal
Auto and 3 steps / Auto (Hi and multi steps)
Manual
Auto
Vertical
Air Filter
Compressor
Refrigerant / Amount charged at shipment
Refrigerant Control
Operation Sound
Washable, Anti-Mold
DC Twin Rotary (Inverter)
R410A / 4.30 (1.95)
Electric Expansion Valve
47 / 44 / 41 / 30
55
lb. (kg)
Indoor : Hi/Me/Lo/Qt*
Outdoor : Hi
dB-A
dB-A
(*Qt = Quiet mode)
Refrigerant Tubing Connections
Flare Type
Max. allowable tubing length at shipment
ft. (m)
inch (mm)
inch (mm)
33 (10)
1/4 (6.35)
5/8 (15.88)
Refrigerant
Narrow tube
Wide tube
Tube Diameter
Refrigerant Tube Kit / Accessories
Optional / Air Clean Filter
Dimensions & Weight
Indoor Unit
11-23/32 (298)
41-15/16 (1,065)
8-19/32 (218)
11-3/8 (289)
44-7/8 (1,140)
14-29/32 (379)
26.5 (12.0)
Outdoor Unit
29-1/8 (740)
35-7/16 (900)
12-19/32 (320)
33-27/32 (860)
40-5/8 (1,032)
16-1/4 (413)
119.0 (54.0)
Unit Dimensions
Height
Width
Depth
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
inch (mm)
lb. (kg)
Package Dimensions Height
Width
Depth
Net
Weight
Shipping
lb. (kg)
cu.ft (m3)
33.1 (15.0)
4.24 (0.12)
127.9 (58.0)
12.71 (0.36)
Shipping Volume
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
Remarks: Rating conditions are:
Cooling: Indoor air temperature 80°F D.B. / 67°F W.B.
Outdoor air temperature 95°F D.B. / 75°F W.B.
13
2-2. Major Component Specifications
2-2-1. Indoor Unit
Indoor Unit
KS1872
Control PCB
Part No.
CB-KS1872
Microprocessor
250V 3A
Controls
Control Circuit Fuse
Remote Control Unit
RCS-4VPIS4U
Fan
Type
Cross-Flow
Q'ty ... Dia. and Length
inch (mm)
1 ... D3-11/16 / L33-9/32 (D94/L845)
Fan Motor
Type
DC Motor
Model ... Q'ty
No. of Poles
SIC-39CVL-D847-2-A ... 1
8
1,250
30
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
W
Ohm
-
(Ambient Temp. 68 F (20 oC))
o
Safety Device
Type
Internal Controller
Over-Current Protection
Over-Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
o
(Ambient Temp. 77 F (25 oC ))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
3.07 (0.285)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
14
Indoor Unit
KS2472
Control PCB
Part No.
CB-KS2472
Microprocessor
250V 3A
Controls
Control Circuit Fuse
Remote Control Unit
RCS-4VPIS4U
Fan
Type
Cross-Flow
Q'ty ... Dia. and Length
inch (mm)
1 ... D3-11/16 / L33-9/32 (D94/L845)
Fan Motor
Type
DC Motor
Model ... Q'ty
No. of Poles
SIC-39CVL-D847-2-A ... 1
8
1,500
30
Rough Measure RPM (Cool)
Nominal Output
Coil Resistance
W
Ohm
-
(Ambient Temp. 68 F (20 oC))
o
Safety Device
Type
Internal Controller
Over-Current Protection
Over-Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Flap Motor
Type
Stepping Motor
MP24Z3
Model
Rating
DC 12V
Coil Resistance
Ohm
Each Pair of Terminal : 400 +/- 7%
o
(Ambient Temp. 77 F (25 oC ))
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
19.5
3.07 (0.285)
ft2 (m2)
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
15
2-2-2. Outdoor Unit
Outdoor Unit C1872
Control PCB
Part No.
CB-C1872
Microprocessor
250V 25A
Controls
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S : 0.482
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 F (20 oC))
Pints (cc)
Ohm
o
S - T : 0.482
T - R : 0.482
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
o
Open : 239 oF(115 oC), Close : 203 F(95 oC)
Run Capacitor
-
-
-
VAC
Crankcase Heater
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D16 -17/32 (D420)
Fan Motor
Type
DC Motor
Model ... Q'ty
DAJ12-55J71A-CU ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
820
50
W
Coil Resistance
Ohm
RED - WHT : 77.5
WHT - BLU : 77.5
BLU - RED : 77.5
o
(Ambient Temp. 68 F (20 oC))
Safety Device
Type
Internal Controller
Over- Current Protection
Run Capacitor
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
21.2
5.49 (0.510)
ft2 (m2)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
16
Outdoor Unit C2472
Control PCB
Part No.
CB-C2472
Microprocessor
250V 25A
Controls
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
G8T265FU1JW / 2,410W
FV50S ... 1.49 (700)
U - V : 0.36
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 77 F (25 oC))
Pints (cc)
Ohm
o
V - W : 0.36
W - U : 0.36
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
o
Open : 239 oF(115 oC), Close : 203 F(95 oC)
Run Capacitor
-
-
-
VAC
Crankcase Heater
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D18-1/8 (D460)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-71FW-D490-1 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
Nominal Output
850
90
W
Coil Resistance
Ohm
o
(Ambient Temp. 68 F (20 oC))
-
Safety Device
Type
Internal Controller
Over- Current Protection
Over- Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
18.1
6.40 (0.595)
ft2 (m2)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
17
Outdoor Unit CL1872
Control PCB
Part No.
CB-CL1842
Microprocessor
250V 25A
Controls
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
C-6RVN93H0M / 1,050W
FV50S ... 0.74 (350)
R - S : 0.482
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 68 F (20 oC))
Pints (cc)
Ohm
o
S - T : 0.482
T - R : 0.482
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
o
Open : 239 oF(115 oC), Close : 203 F(95 oC)
Run Capacitor
-
-
-
VAC
Crankcase Heater
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D16 -17/32 (D420)
Fan Motor
Type
DC Motor
Model ... Q'ty
DAJ12-55J71A-CU ... 1
No. of Poles
Rough Measure RPM (Cool)
Nominal Output
8
820
50
W
Coil Resistance
Ohm
RED - WHT : 77.5
WHT - BLU : 77.5
BLU - RED : 77.5
o
(Ambient Temp. 68 F (20 oC))
Safety Device
Type
Internal Controller
Over- Current Protection
Run Capacitor
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
21.2
5.49 (0.510)
ft2 (m2)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
18
Outdoor Unit CL2472
Control PCB
Part No.
CB-CL2472
Microprocessor
250V 25A
Controls
Control Circuit Fuse
Compressor
Type
DC Twin Rotary (Hermetic)
G8T265FU1JW / 2,410W
FV50S ... 1.49 (700)
U - V : 0.36
Compressor Model / Nominal Output
Compressor Oil ... Amount
Coil Resistance (Ambient Temp. 77 F (25 oC))
Pints (cc)
Ohm
o
V - W : 0.36
W - U : 0.36
Safety Device
CT (Peak current cut-off control)
Compressor Discharge Temp. Control
Operation cut-off control in abnormal ambient Temp.
Yes
Yes
Yes
Overload Relay
Model
Operation Temp.
Micro F
CS-7L115
o
Open : 239 oF(115 oC), Close : 203 F(95 oC)
Run Capacitor
-
VAC
-
Crankcase Heater
230V 30W
Fan
Type
Propeller
Q'ty ... Dia.
inch (mm)
1 ... D18-1/8 (D460)
Fan Motor
Type
DC Motor
Model ... Q'ty
SIC-71FW-D490-1 ... 1
No. of Poles
8
Rough Measure RPM (Cool)
Nominal Output
850
90
W
Coil Resistance
Ohm
o
(Ambient Temp. 68 F (20 oC))
-
Safety Device
Type
Internal Controller
Over- Current Protection
Over- Heat Protection
Run Capacitor
Yes
Yes
-
-
Micro F
VAC
Heat Exchanger Coil
Coil
Aluminum Plate Fin / Copper Tube
Rows
2
Fins per inch
Face Area
18.1
6.40 (0.595)
ft2 (m2)
External Finish
Acrylic baked-on enamel finish
DATA SUBJECT TO CHANGE WITHOUT NOTICE.
19
2-3. Other Component Specifications
Indoor Unit
KS1872
KS2472
Outdoor Unit C1872 C2472
CL1872 CL2472
Indoor heat exchanger sensor
(Model:PTM-D51H-S3 TH1)
Compressor temp sensor
(Model:TKS 293B)
Indoor air temp sensor
(Model:PTM-D51H-S3 TH2)
10
9
8
7
6
5
4
3
2
1
0
200
180
160
140
120
100
80
60
40
20
0
50
59 68 77 86 95 104
32 50 68 86 104 122 140 158 176 194
(0) (10)(20) (30) (40)(50) (60) (70)(80) (90)
(10) (15) (20) (25) (30) (35) (40)
Temperature °F (°C)
Temperature °F (°C)
Outdoor air temp sensor
(Model:TKS295B)
Outdoor heat exchanger sensor
(Model:TKS292B)
40
35
30
25
20
15
10
5
0
-
4
5
14 23 32 41 50 59 68
10) ( 5) (0) (5) (10) (15) (20)
Temperature °F (°C)
(
-20)(
-15)(
-
-
20
3. DIMENSIONAL DATA
Indoor Unit
KS1872
KS2472
Unit: inch(mm)
21
Outdoor Unit C1872
CL1872
23-15/16
5-11/32
15/32
11-17/32
Wide tube service valve
dia.1/2" (12.70)
34-21/32 (880)
2-17/32
Narrow tube service valve
dia.1/4" (6.35)
3/32
5-23/32
1-13/16
2-13/32
Unit: inch(mm)
22
Outdoor Unit C2472
CL2472
23-15/16
5-11/32
15/32
11-17/32
Narrow tube service valve
dia.1/4" (6.35)
35-7/16(900)
2-15/16
Wide tube service valve
dia.5/8" (15.88)
2-1/32
4-1/2
1-21/32
2-7/8
Unit: inch(mm)
23
4. REFRIGERANT FLOW DIAGRAM
4-1. Refrigerant Flow Diagram
Indoor Unit
KS1872
KS2472
Outdoor Unit C1872 C2472
CL1872 CL2472
Indoor unit
Outdoor unit
Wide tube
service
valve
Wide tube
*1
Accumulator
Muffler
High pressure
switch
H.P.
Electric
expansion
valve
Narrow
tube
service
valve
M
Narrow tube
O.D.
1/4"
(6.35 mm)
Cooling cycle
...
...
*1 O.D.1/2"(12.7mm)
O.D.5/8"(15.88mm)
1872 class
2472 class
Insulation of Refrigerant Tubing
IMPORTANT
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min. 5/16"(8 mm).
Insulation
Thickness:
Min. 5/16"(8 mm)
Thickness:
Min. 5/16"(8 mm)
Narrow tube
After a tube has been insulated,
never try to bend it into a narrow
Wide tube
CAUTION
curve because it can cause the tube
to break or crack.
24
5. PERFORMANCE DATA
5-1. Temperature Charts
Indoor Unit
KS1872
Outdoor Unit C1872
Cooling Characteristics (230V)
159
(1.1)
Outdoor fan speed
Low High
145
(1.0)
131
(0.9)
117
(0.8)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
9
8
7
6
Outdoor fan speed
Low
High
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
Outdoor fan speed
Low
High
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
77
(25)
86
95
104
(40)
(30)
(35)
Outdoor inlet air D.B. temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "9-2. Overload prevention during heating.")
:Points of rating condition
Black dots in above charts indicate the following rating conditions.
Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B.
Outdoor air temperature 95 °F D.B.
25
Indoor Unit
KS1872
Outdoor Unit CL1872
Cooling Characteristics (230V)
159
(1.1)
Outdoor fan speed
Low High
145
(1.0)
131
(0.9)
117
(0.8)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
9
8
7
6
Outdoor fan speed
Low
High
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
Outdoor fan speed
Low
High
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
77
(25)
86
95
104
(40)
(30)
(35)
Outdoor inlet air D.B. temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "9-2. Overload prevention during heating.")
:Points of rating condition
Black dots in above charts indicate the following rating conditions.
Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B.
Outdoor air temperature 95 °F D.B.
26
Indoor Unit
KS2472
Outdoor Unit C2472
Cooling Characteristics (230V)
159
(1.1)
Outdoor fan speed
Low High
145
(1.0)
131
(0.9)
117
(0.8)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
15
Outdoor fan speed
Low
High
14
13
12
11
10
9
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
Outdoor fan speed
Low
High
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
77
(25)
86
95
104
(40)
(30)
(35)
Outdoor inlet air D.B. temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "9-2. Overload prevention during heating.")
:Points of rating condition
Black dots in above charts indicate the following rating conditions.
Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B.
Outdoor air temperature 95 °F D.B.
27
Indoor Unit
KS2472
Outdoor Unit CL2472
Cooling Characteristics (230V)
159
(1.1)
Outdoor fan speed
Low High
145
(1.0)
131
(0.9)
117
(0.8)
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
15
Outdoor fan speed
Low
High
14
13
12
11
10
9
77
(25)
86
(30)
95
(35)
104
(40)
Outdoor inlet air D.B. temp. °F(°C)
Outdoor fan speed
Low
High
68.0(20)
64.4(18)
60.8(16)
57.2(14)
53.6(12)
50.0(10)
77
(25)
86
95
104
(40)
(30)
(35)
Outdoor inlet air D.B. temp. °F(°C)
NOTE
Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
Overload prevention operates to protect the air conditioner when outdoor ambient temperature becomes extremely high in
heating mode. (Refer to "9-2. Overload prevention during heating.")
:Points of rating condition
Black dots in above charts indicate the following rating conditions.
Cooling: Indoor air temperature 80 °F D.B. / 67 °F W.B.
Outdoor air temperature 95 °F D.B.
28
5-2. Air Throw Distance Charts
Indoor Unit
KS1872
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15 20
0
5
25
30
0
5
10
15
: Flap angle 0 ,
: Flap angle 30 ,
: Axis air velocity 0
: Axis air velocity 30
29
Indoor Unit
KS2472
Room air temp. : 80°F (26.7°C)
Cooling
Fan speed
:
High
Horizontal distance (ft.)
10 15 20
0
5
25
30
0
5
10
15
: Flap angle 0 ,
: Flap angle 30 ,
: Axis air velocity 0
: Axis air velocity 30
30
6. ELECTRICAL DATA
6-1. Electrical Characteristics
Indoor Unit
KS1872
Outdoor Unit C1872
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Fan Motor + Compressor
230V Single-phase 60Hz
6.7
Complete Unit
Performance at
Rating conditions
Running amp.
Power input
A
0.3
32
7.0
W
1,468
1,500
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.3
32
7.4
7.7
A
1,468
1,500
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Indoor Unit
KS1872
Outdoor Unit CL1872
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
230V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.3
32
6.7
7.0
A
1,468
1,500
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.3
32
7.4
7.7
A
1,468
1,500
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
31
Indoor Unit
KS2472
Outdoor Unit C2472
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Fan Motor + Compressor
230V Single-phase 60Hz
10.3
Complete Unit
Performance at
Rating conditions
Running amp.
Power input
A
0.5
55
10.8
W
2,300
2,355
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.5
55
11.6
12.1
A
2,300
2,355
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Indoor Unit
KS2472
Outdoor Unit CL2472
Cooling
<
230V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
230V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.5
55
10.3
10.8
A
2,300
2,355
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
Cooling
<
208V >
Indoor Unit
Fan Motor
Outdoor Unit
Complete Unit
Fan Motor + Compressor
Performance at
208V Single-phase 60Hz
Rating conditions
Running amp.
Power input
0.5
55
11.6
12.1
A
2,300
2,355
W
Rating conditions:
Indoor air temperature:
Outdoor air temperature:
80°F (26.7°C) D.B. / 67°F (19.4°C) W.B.
95°F (35°C) D.B.
32
6-2. Electric Wiring Diagrams
Indoor Unit
KS1872
KS2472
To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.
WARNING
TERMINAL BASE
EVAPORATOR
1
2
3
BLK
WHT
RED
AC1 AC2 SI
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
RED
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
WHT
CONNECTOR
1 1
2 2
3 3
4 4
5 5
RED
1 1
2 2
3 3
4 4
5 5
PNK
BLU
BRN
YEL
FLAP
5P (WHT)
FLAP
LAMP
10P(
)
WHT
FLAP MOTOR
CONTROLLER
ROOM THERMISTOR
1 1
2 2
3 3
4 4
BLK
BLK
BLK
BLK
RED 1 1
2 2
BLK 3 3
WHT 4 4
YEL 5 5
BLU 6 6
ROOM/COIL
4P(
)
WHT
DCM
FM
6P(BLU)
COIL THERMISTOR
FAN MOTOR
1 1
2 2
3 3
ION
WHT
3P (
)
HA
JEM-A
4P (WHT)
1 2 3 4
1 2 3 4
1 2 3 4
ION
TERMINAL
ION ASSY
8FA2-5257-70500-0
33
Outdoor Unit C1872
CL1872
To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.
WARNING
REACTANCE
BLK
POWER RELAY
1
1
2
2
6
1
4
5
BLK
W
W
W
W
W
W
W
W
W
W
W
W
W
W
+
+
-
-
-
-
L1
L2 HIC HIC
BD BD
HIC HIC
AC2 AC2
A1 A2
FERRITE
CORE
TERMINAL
PLATE
E1
E
25A
1
2
3
4
5
6
W
W
W
ACIN1
ACIN2
SI-A
BLK
WHT
RED
W
W
W
U
V
CONTROLLER
GND
W
BLK
WHT
DCFM
COMP
A-TH
COIL/OUTDOOR
MV0
1
2
3
4
5
6
7
1
1
2
2
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
N
L
1
1
2
2
3
3
POWER
SUPPLY
1
1
2
2
3
3
4
4
5
5
6
6
7
7
HIGH PRESSURE
SWITCH
1
1
2
2
3
3
4
4
5
5
1
2
1
2
BLK
BLK
MV
2P-CONNECTOR (BLK)
S
MAGNETIC COIL
R
T
CM
FM
GRN/YEL
OVERLOAD RELAY
(OLR)
COMPRESSOR
MOTOR
FAN MOTOR
1
2
1
2
WHT
WHT
WHT
WHT
2P-CONNECTOR (RED)
8FA2-5257-68600-2
34
Outdoor Unit C2472
To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.
WARNING
REACTANCE
BLK
POWER RELAY
1
1
2
2
6
1
4
5
BLK
W
W
W
W
W
W
W
W
W
W
W
W
W
W
+
+
-
-
-
-
L1
L2 HIC HIC
BD
BD
HIC HIC
AC2 AC2
A1 A2
FERRITE
CORE
TERMINAL
PLATE
E1
E
25A
1
2
3
4
5
6
W
W
W
ACIN1
ACIN2
SI-A
BLK
WHT
RED
W
W
W
U
V
CONTROLLER
GND
W
BLK
WHT
DCFM
COMP
A-TH
COIL/OUTDOOR
MV0
1
2
3
4
5
6
7
1
1
2
2
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
N
L
1
1
2
2
3
3
POWER
SUPPLY
1
1
2
2
3
3
4
4
5
5
6
6
7
7
HIGH PRESSURE
SWITCH
1
1
2
2
3
3
4
4
5
5
1
2
1
2
BLK
BLK
MV
2P-CONNECTOR (BLK)
V
MAGNETIC COIL
U
W
CM
FM
OVERLOAD RELAY
(OLR)
COMPRESSOR
MOTOR
FAN MOTOR
1
2
1
2
WHT
WHT
WHT
WHT
2P-CONNECTOR (RED)
8FA2-5257-68700-3
35
Outdoor Unit CL2472
To avoid electrical shock hazard, be sure to
disconnect power before checking, servicing
and/or cleaning any electrical parts.
WARNING
REACTANCE
BLK
(
)
)
1P-CONNECTOR WHT
POWER RELAY
1
1
2
2
1
1
6
1
4
(
1P-CONNECTOR WHT
1
1
5
BLK
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
+
+
-
-
-
-
HEATER1 HEATER0 L1
L2 HIC HIC
BD
BD
HIC HIC
AC2 AC2
A1 A2
FERRITE
CORE
TERMINAL
PLATE
E1
E
25A
CRANKCASE
HEATER
1
2
3
4
5
6
W
W
W
ACIN1
ACIN2
SI-A
BLK
WHT
RED
W
U
CONTROLLER
GND
W
V
W
W
BLK
WHT
DCFM
COMP
A-TH
COIL/OUTDOOR
MV0
1
2
3
4
5
6
7
1
1
2
2
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
1
1
2
2
3
3
4
4
5
5
N
L
1
1
2
2
3
3
POWER
SUPPLY
1
1
2
2
3
3
4
4
5
5
6
6
7
7
HIGH PRESSURE
SWITCH
1
1
2
2
3
3
4
4
5
5
1
2
1
2
BLK
BLK
MV
2P-CONNECTOR (BLK)
V
MAGNETIC COIL
U
W
CM
FM
OVERLOAD RELAY
(OLR)
COMPRESSOR
MOTOR
FAN MOTOR
1
2
1
2
WHT
WHT
WHT
WHT
2P-CONNECTOR (RED)
8FA2-5257-68400-3
36
7. INSTALLATION INSTRUCTIONS
7-1. Installation Site Selection
7-1-1. Indoor Unit
To prevent abnormal heat
WARNING
generation 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.
6" (15 cm)
min.
2" (5 cm)
min.
2" (5 cm)
min.
Front View
AVOID:
Fig. 1
direct sunlight.
nearby heat sources that may affect performance of
the unit.
Tubing length (L)
INDOOR
UNIT
areas where leakage of flammable gas may be
expected.
Elevation
difference (H)
OUTDOOR
UNIT
places where large amounts of oil mist exist.
DO:
select an appropriate position from which every corner
of the room can be uniformly cooled. (High on a wall
is best.)
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
Indoor unit
Wall
For stable operation of
the air conditioner, do not
install wall-mounted type
indoor units less than
allow room for operation and maintenance as well as
unrestricted air flow around the unit. (Fig. 1)
install the unit within the maximum elevation
difference (H) above or below the outdoor unit and
within a total tubing length (L) from the outdoor unit as
detailed in Table 1 and Fig. 2.
Minimum height
from floor level
5' (1.5 m)
5' (1.5 m) from floor level.
Floor level
Install the indoor unit more than 3.3' (1 m) away from
any antenna or power lines or connecting wires used
for television, radio, telephone, security system, or
intercom. Electrical noise from any of these sources
may affect operation.
Fig. 3
Table 1
Max. Allowable Tubing
Length at Shipment
(ft.)
Limit of Tubing
Length (L)
(ft.)
Limit of Elevation
Difference (H)
(ft.)
Required Amount of
Additional Refrigerant
(oz. / ft.)*
Model
KS1872
KS2472
25
33
98
49
49
0.27
0.27
131
* If total tubing length becomes 25 to 98 ft. (Max.) or 33 to 131 ft. (Max.), charge additional refrigerant (R410A) by 0.27 oz. /ft.
No additional charge of compressor oil is necessary.
37
7-1-2. Outdoor Unit
Exhaust fan
NO
Hot air
AVOID:
Heat source
heat sources, exhaust fans, etc. (Fig. 4)
damp, humid or uneven locations.
DO:
Outdoor unit
choose a place as cool as possible.
choose a place that is well ventilated.
allow enough room around the unit for air intake/
exhaust and possible maintenance. (Fig. 5a or 5b)
provide a solid base (level concrete pad, concrete
block, 4" × 1' 4" (10 × 40 cm) or 6" × 1'4" (15 × 40
cm) beams or equal), a minimum of 4" (10 cm) or
6" (15 cm) above ground level to reduce humidity
and protect the unit against possible water damage
and decreased service life. (Fig. 5c or 5d)
Install cushion rubber under unit's feet to reduce
vibration and noise. (Fig. 5e)
Fig. 4
Obstacle above
Min.
(C1872, CL1872)
Min.
7' (2 m)
7' (2 m)
Air intake
Min. 4" (10 cm) Valve
side
Min. 10"
(25 cm)
Min.
2" (5 cm)
use lug bolts or equal to bolt down unit, reducing
vibration and noise.
Air discharge
Min.
1'4" (40 cm)
Install in a location where no antenna of a
television or radio exists within 10' (3 m).
Ground
Min. 4" (10 cm)
Air intake
Fig. 5a
(C1872, CL1872)
Anchor bolts
(4 pcs.)
Obstacle above
Min.
(C2472, CL2472)
Min. 4" (10 cm)
Air intake
Min.
7' (2 m)
7' (2 m)
Air intake
Min. 8" (20 cm) Valve
side
Concrete
or equal
Min. 10"
(25 cm)
Min.
4" (10 cm)
Air discharge
Min.
1'8" (50 cm)
Ground
Min. 8" (20 cm)
Air intake
Fig. 5c
Fig. 5b
Anchor bolts
(4 pcs.)
(C2472, CL2472)
Min. 6" (15 cm)
Air intake
Concrete
or equal
Cushion rubber
Fig. 5e
Fig. 5d
38
7-2. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your
local electrical codes. Carefully observe these regulations when carrying out the installation.
Table 2 lists recommended wire lengths and diameters for power supply systems.
NOTE
Refer to the wiring system diagram (Fig. 6) for the meaning of (A), (B) and (C) in Table 2.
Refer to your local codes or in the absence of local codes see the National Electric Code: ANSI/NFPA70.
Table 2
(A)+(B) (A) Power Supply Wiring Length (ft.)
(B) Power Line Length (ft.)
(C) Control
AWG
Fuse or Circuit
Breaker Capacity
Line Length (ft.)
(#14)
(#12)
(#14)
Model
C1872, C2472, CL1872, CL2472
20A
131 (Max.)
230 (Max.)
65 (Max.)
#...AWG (American Wire Gauge)
WARNING
WIRING SYSTEM DIAGRAM
INDOOR
UNIT
Terminal
OUTDOOR
UNIT
Disconnect
switch
Field supply
Be sure to comply with local codes on running the
wire from the indoor unit to the outdoor unit (size of
wire and wiring method, etc.).
Each wire must be firmly connected.
No wire should be allowed to touch refrigerant tubing,
the compressor, or any moving part.
Terminal
(B)
230 / 208V
1
2
1
2
230 / 208V
230 / 208V
3
3
4
5
6
(C)
(A)
L1
L2
Grounding line
(B)
WARNING
Grounding
line
To avoid the risk of electrical shock, each air
conditioner unit must be grounded.
Fig. 6
For the installation of a grounding device, please
observe local electrical codes.
Grounding is necessary, especially for units using
inverter circuits, in order to release charged
electricity and electrical noise caused by high
tension. Otherwise, electrical shock may occur.
Place a dedicated ground more than 7' (2 m) away
from other grounds and do not have it shared with
other electric appliances.
CAUTION
Be sure to connect the power supply line to the outdoor unit as shown in the wiring
diagram. The indoor unit draws its power from the outdoor unit.
Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone,
security system, or intercom any closer than 3' 4" (1 m) from the power cable and wires
between the indoor and outdoor units. Electrical noise may affect the operation.
39
7-3. Remote Control Unit Installation Position
The remote control unit 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 control unit 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 control unit and the air conditioner (since a check signal is sent
from the remote control unit every 5 minutes)
7-3-1. Mounting on a Wall
Before mounting the
Rear side
remote control unit, press
the ON/OFF operation
button at the mounting
location to make sure that
the air conditioner
Remote control unit mount
Press
Mounting screws
5/32 × 5/8"(4 × 16mm)
(included)
operates from that
Hole
location. The indoor unit
should make a beeping
sound to indicate that it
has received the signal.
Set in
place
To prevent loss of the remote control
unit, you can connect the remote
control unit to the mount by passing
a string through the remote control
unit and attachment hole.
To take out the remote control unit, pull it forward.
Fig. 7
40
7-4. How to Test Run the Air Conditioner
After turning on power to 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. 8a)
a) Press and hold the ION button.
b) Then press and hold the 1HR TIMER button.
ON/OFF
operation
button
c) At the same time, press the ACL (reset) button once.
Use a pointed object such as the tip of a pen to press
the ACL button.
ION
button
After a few seconds, " " appears and "oP-1" blinks in
the remote controller display area.
(Fig. 8b)
1HR.
TIMER
button
d) Release the 1HR TIMER button.
e) Release the ION button.
(2) Start Cooling mode test run by pressing the ON/OFF
operation button of the remote controller. (Fig. 8a)
This starts the fan producing uncooled forced air with
the 4 indicator lamps (OPERATION lamp, TIMER
lamp, QUIET lamp, and ION lamp) on the main unit
blinking. (Fig. 8c)
ACL
(Reset)
button
After 3 minutes, the system shifts into cooling operation,
and cool air will start to be felt. Cool mode test
run is unaffected by the room temperature.
Fig. 8a
(3) Press the ON/OFF operation button of the remote controller
again to stop the test run. (Fig. 8a)
(4) Finally press the ACL (reset) button of the remote controller
to release it from Test Run mode to return to normal
mode. (Fig. 8a)
" " and "oP-1" will disappear from the remote controller
display area.
IMPORTANT
Fig. 8b
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.
OPERATION lamp
TIMER lamp
QUIET lamp
ION lamp
Fig. 8c
41
Grille
Air intake grille
7-5. Remove the Grille to Install the
Indoor Unit
Basically, these models can be installed and wired without
removing the grille. If access to any internal part is needed,
follow the steps as given below.
Fig. 9a
How to remove the grille
(1) Grasp both ends of the air intake grille, and remove
it by opening towards the front and pulling towards
you. (Fig. 9a)
(2) Remove the 3 screws. (Fig. 9b)
(3) Remove the screw on the right side cover plate and
open the cover. (Fig. 10a)
(4) Take out the thermistor from the grille. (Fig. 10b)
(5) Press the 3 tabs at the top of the grille and the 3
tabs on the front face to separate the grille from the
frame. (Fig. 11a)
Fig. 9b
Cover
Thermistor
Thermistor
(6) Pull the grill toward you to remove it.
How to replace the grille
(1) When installing the grille, place the bottom of the
grille into the frame first. (Fig. 11b)
Fig. 10b
Fig. 10a
Tab
Then insert the tabs on the top of the grille and on
the front face into the frame.
(2) Make sure that the grille and frame are firmly fitted
together by engaging the tabs.
(3) Attach the thermistor on the grille. (Fig. 10a)
(4) Close the cover and replace the screw. (Fig. 10a)
(5) Affix the grille with the 3 previously removed screws.
(Fig. 9b)
Tab
(6) Install the air intake grille.
Fig. 11a
(a) Allow the edge of the air intake grille to slide into the
top of the indoor unit, and then insert it all the way
inside. (Fig. 12a)
(b) Press the bottom right and left corners and center of
the air intake grille to attach it to the indoor unit.
(Fig. 12b)
NOTE
Attach so that the round pins at the top right and left cor-
ners of the air intake grille are inserted into the grooves at
the top right and left of the indoor unit.
Fig. 11b
Pin
Groove
Fig. 12a
Fig. 12b
42
8. MAINTENANCE
Tab
8-1. Address Setting of the Remote
Control Unit
The address can be set in order to prevent
interference between remote controllers when two
Sanyo indoor units are installed near each other. The
address is normally set to "A." To set a different
address, it is necessary to change the address on the
second remote controller.
Fig. 13
NOTE
Once changed, you cannot restore the original
address setting of the air conditioner.
(1) Switch on the power source.
(2) Break the address-setting tab marked "A" on the
second remote controller to change the address
(Fig. 13). When the tab is removed, the address is
automatically set to B (Fig. 14).
ACL button
(3) Press and hold the remote controller ION button
and 1 HR TIMER button. At the same time, press
the ACL(reset) button. Use a thin object such as
the tip of a pen to press the ACL button. When
this has been done, "oP-1" (test run) appears,
blinking, in the remote controller clock display
area.
Fig. 14
(4) Each time the 1 HR TIMER button is pressed, the
display changes as shown below. Press this
button 2 times to change the display to "oP-7"
(address setting). (Fig. 15)
ON/OFF
operation
button
ION
button
Test run mode
Self-diagnostic mode
Address setting mode
1HR.
TIMER
button
(5) "oP-7" has now been selected for address setting.
(6) Press the ON/OFF operation button on the remote
controller. (Fig. 15) Check that the "beep"signal-
received sound is heard from the second indoor
unit (approximately 5 times). The sound you hear
is the signal that the remote controller address
has been changed.
(7) Finally press the remote controller ACL (reset)
button to cancel the blinking "oP-7" display. (Fig.
15)
ACL
(Reset)
button
Changing of the second remote controller address is
now completed.
Fig. 15
43
8-2. Disconnecting and Connecting Positive Connector for Outdoor Unit
One of the two types of connectors illustrated at left is used. Their
basic structure is the same for each.
How to Disconnect
Hold the resin connector cover, and pull the connector off.
You cannot disconnect the connector by pulling the wire since
it is locked inside. Always hold the cover to disconnect. (See
illustration at left.) For the connector without the resin cover,
push the lock in the direction of "2" while pulling it off.
Pull the cover upward
How to Connect
In order to connect, hold the resin cover of the connector and
push it in. Confirm the click sound for the inside lock.
When the cover is pulled upward, the lock is
released with the sequence of 1 and 2.
44
9. FUNCTIONS
9-1. Operation Functions
Emergency operation
SENSOR DRY
Emergency operation is available when the remote
controller malfunctions, has been lost, or otherwise
cannot be used.
During DRY operation, the system adjusts the room
temperature and fan speed according to the conditions in the
room, in order to maintain a comfortable room environment.
SENSOR DRY operation
To operate the system, press the OPERATION button,
which is also used as the receiver, below the unit display.
Each time this button is pressed, the OPERATION lamp
changes color to indicate the type of operation. Select the
desired type of operation.
DRY operation is as shown in the figure below.
Load
COOL zone
A zone
COOL
(GREEN)
STOP
(Lamp Off)
B zone
The set temperature is 4°F(2°C) below the detected room
temperature in the case of cooling operation.
Conditions are monitored at all
times when the room temperature
is below 59°F(15°C).
DRY A
The compressor operation frequency varies.
The indoor fan operates with 1/f fluctuation.
DRY B
The compressor operates at a low operating frequency.
The indoor fan operates with 1/f fluctuation.
Monitor
Monitoring operation takes place when the room temperature
is below 59°F(15°C), or more than 5°F(3°C) below the set
temperature.
When the monitoring range is entered, the compressor stops,
and the indoor fan operates with 1/f fluctuation.
NOTE
(CLxx models only)
The Sensor Dry operation during the Low Ambient Cooling
Mode (outside air temperature:59°F(15°C) or lower) is as
follows.
DRY A
and
DRY B
The compressor operates a cycle of 3 minutes ON and 6
minutes OFF repeatedly.
PAM- control
In order to further improve inverter performance, control is
switched between PWM control at low operation speeds, and
PAM control at high operation speeds, making the most
effective use of power.
45
HIGH POWER
NIGHT SETBACK
This function acts to raise the power but keeps the AC system in
the same operating mode.
This function is set with the HIGH POWER button on the remote
controller.
(It can be set regardless of the temperature and fan speed
settings.)
When NIGHT SETBACK operation is set, the temperature and
fan speed settings will be adjusted automatically to allow
comfortable sleep.
When NIGHT SETBACK operation is set, " mark" appears on
the remote controller. The main unit display lamp also becomes
dimmer.
HIGH POWER operation from remote controller
COOL and DRY modes
The unit operates at maximum output for 30 minutes,
regardless of the desired temperature.
The fan speed is 1 step above "High."
When the night setback mode is selected, the air conditioner
automatically raises the temperature setting 2°F(1°C) when 30
minutes have passed after the selection was made, and then
another 2°F(1°C) after another 30 minutes have passed,
regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing
comfort. This function is convenient when gentle cooling is
needed.
Frequency
MAX
2°F(1°C)
Setting
temperature
Time
0
2°F(1°C)
30 min.
5 min.
Press the NIGHT
SETBACK button
30 min.
30 min.
Start
End
Time
NOTE
When HIGH POWER operation ends, the unit operates at low
Hz for 5 minutes, regardless of the thermostat OFF conditions.
When in DRY mode, operation is in the cooling zone.
Lamp colors
OPERATION lamp
DRY operation
COOL operation
FAN operation
Orange
Green
Green
TIMER lamp
Green
Green
Green
QUIET lamp
ION lamp
Timer backup
Operation stops if there are no operator controls for 25 hours or
longer after unit operation switched from OFF to ON by use of
ON timer operation.
46
9-2. Protective Functions
Compressor discharge temperature control
Freeze prevention
This function controls the operation frequency to prevent the
compressor discharge temperature from rising more than a
specified temperature.
During COOL or DRY operation, freezing is detected and
operation is stopped when the temperature of the indoor heat
exchanger matches the conditions below.
1. Freeze-prevention operation is engaged when the
Compressor discharge temperature °F(°C)
temperature of the indoor heat exchanger is below 43°F(6°C).
2. Restart after freeze-prevention operation occurs when the
temperature of the indoor heat exchanger reaches 46°F(8°C)
or above.
Approx.
A
214
(101)
Approx.
B
201
C
(94)
8
a
b
c
d
A
B
6
2
a. Area: Automatic capacity control.
b. When the temperature rises above Point A, the operation
frequency is reduced at a specified rate.
c. Area: Further frequency increase is prohibited.
d. When the temperature falls below Point B, prevention of a rise
in frequency is released and the air conditioner operates as in
*
a
b
c
d
a. Area: Automatic capacity control
b. When the temperature drops below Point A, the operation
frequency is reduced by a certain proportion.
c. Area: Frequency increase is prohibited.
d. When the temperature reaches Point C or above, freezing
a
area.
* The compressor will stop if the temperature of the compressor
discharge exceeds 248°F(120°C) due to shortage of gas or
other reason.
prevention is ended and control is the same as in the
a
area.
* When the temperature drops to below 4°F(2°C) (continuously
for 2 minutes or longer), the compressor stops.
Once the freeze condition is detected, the air conditioner will
work less than the maximum frequency until it is turned off.
CT (Peak current cut-off control)
This function prevents the circuit breaker or fuse from operating
to open the circuit. This function works when electrical current
has increased due to an increase in the cooling load,
or to a decrease in the power supply voltage. In these cases,
operation frequency is reduced or operation is interrupted auto-
matically to control the electrical current for operation.
NOTE
(CLxx models only)
The Freeze Prevention Control during the Low Ambient Cooling
Mode (outside air temperature:59°F(15°C) or lower) is as follows.
The compressor stops when the temperature of indoor heat
exchanger becomes less than 36°F(2°C).
The compressor restarts when the temperature of indoor heat
exchanger becomes 46°F(8°C) or higher.
When the cause of the increase in electrical current is rectified,
the system will resume operation in the original mode.
(A)
Cooling Dry
Peak current cut-off trips
Hz down
22.5
14.0
47
10. TROUBLESHOOTING
10-1. 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.
10-2. 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
ION
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 ION button and 1 HR TIMER
button. At the same time, press the ACL (reset) button. Use a
pointed object such as the tip of a pen to press the ACL button.
When this has been done, "oP-1" (test run) appears, blinking, in
the remote controller clock display area.
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.
48
(1) Self-diagnostics Lamps
INDOOR UNIT
(1) OPERATION lamp
(2) TIMER lamp
(3) QUIET lamp
ION lamp
OPERATION button
REMOTE CONTROL receiver
Since the indications cover various units, the corresponding parts listed below may not be present in some models.
.... .... ....
Indication on indoor unit
OFF
Blinking
ON (Illuminated)
Quiet
(3)
Timer
(2)
Operation
(1)
Code
S01
S02
S03
Diagnostics item
Room temperature sensor failure
Indoor heat exchanger sensor failure
Humidity sensor failure
Diagnostics contents
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(short-circuit detection only for the humidity sensor)
(3) Indoor/outdoor circuit board failure
Compressor temperature sensor failure
S04
S05
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Outdoor circuit board failure
Outdoor heat exchanger sensor failure
Outdoor air temperature sensor failure
S06
S07
E01
Outdoor electrical current detection
failure
Outdoor circuit board failure
(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power relay failure
(5) Indoor or outdoor circuit board failure
Indoor/outdoor communications failure
(serial communications)
(1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage
(4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation
(7) Compressor failure (8) Outdoor circuit board failure
• HIC circuit failure
• Power Tr (transistor) circuit failure
E02
Outdoor unit external ROM (OTP data)
failure
(1) External ROM data failure (2) Outdoor circuit board failure
E03
E04
E05
(1) Instantaneous power outage (2) HIC or power transistor failure
(3) Outdoor circuit board failure
Peak current cut-off
PAM circuit failure
Active circuit failure
(1) Outdoor circuit board failure (2) Outdoor power supply voltage failure
Compressor discharge overheat
prevention activated.
(1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant
(4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor circuit board failure
E06
E07
Indoor fan operating failure
(1) Fan motor failure (2) Contact failure at connector (3) Indoor circuit board failure
4-way valve switching failure
Indoor zero-cross failure
(1) 4-way valve failure (heat pump model only)
(2) Outdoor circuit board failure
E08
E09
E10
E11
No-refrigerant protection
(1) Service valve not opened. (2) Shortage of refrigerant
DC compressor drive circuit failure
Outdoor fan operating failure
(1) Open phase (2) Outdoor circuit board failure
(1) Fan motor failure (2) Contact failure at connector (3) Outdoor circuit board failure
Outdoor system communications failure
Outdoor high-pressure SW
OLR operation
Outdoor power supply open phase
Outdoor coil freezing
(1) Mis-wiring (2) Blown fuse (3) Power relay failure (4) Open phase
(5) Outdoor circuit board failure (6) Compressor failure
E12
E13
Freeze-prevention operation activated.
(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation
49
(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.
50
10-3. 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 7.4" How to Test Run the Air Conditioner".
(2) Checking the outdoor unit
No.
Control
Check items (unit operation)
1
Apply the rated voltage between outdoor
unit terminals 1 and 2.
• 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
(3) Checking the serial communications
....
....
....
Illuminated
OFF
Blinking
Control 1
Control 2
Short-circuit terminals 2 and 3 on
the outdoor unit terminal plate.
Short-circuit terminals 2 and 3 on
the indoor unit terminal plate.
Initial self-diagnostics
Probable location of malfunction
Quiet
Timer
Operation
Quiet
Timer
Operation
Quiet
Timer
Operation
( 3 )
( 2 )
( 1 )
( 3 )
( 2 )
( 1 )
( 3 )
( 2 )
( 1 )
Indoor unit circuit board failure
Outdoor unit circuit board failure
Failure (open circuit, contact failure, etc.)
in the inter-unit wirings
Outdoor unit circuit board failure
Turn the power OFF before performing short circuiting procedures.
Refer to the previous pages when performing system self-diagnostics.
So that the check can be made quickly, indicators blink at first communication after power ON.
Before performing the above checks, perform “TEST run” operation, and check that the rated voltage is output to terminals 1 and 2
on the outdoor unit. If it is not output, there is a failure related to the indoor unit power.
51
10-4. Trouble Diagnosis of Fan Motor
10-4-1. 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 230 V or more
DC 14 V or more
(1) Vm-Gnd: Between pin 1 and pin 3
(2) Vcc-Gnd: Between pin 4 and pin 3
(3) Vs-Gnd: Between pin 5 and pin 3
Fluctuation between DC 1.0 to 4.3 V
(Diagnostic results)
All of the above measured values are normal. Fan motor trouble (Replace the motor.)
Any one of the above measured values is not normal. Indoor unit controller trouble (Replace the controller .)
(Reference)
DC motor connector pin arrangement
Pin 1: Vm (red)
Pin 2: Not used
Pin 3: Gnd (black)
Pin 4: Vcc (white)
Pin 5: Vs (yellow)
Pin 6: PG (blue)
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the indoor unit
operates.
(There is trouble in the system that provides feedback of motor rotation speed from the
motor to the indoor unit controller.)
[Trouble symptom 4] Fan motor rotation speed does not change during indoor unit operation.
[Trouble symptom 5] Fan motor rotation speed varies excessively during indoor unit operation.
(Remedy for symptom 3 to 5)
It is not possible to identify whether the trouble is indoor unit controller trouble or motor trouble.
Therefore, first replace the indoor unit controller, then (if necessary) replace the DC motor.
52
10-4-2. Outdoor Fan Motor
This outdoor DC fan motor contains an internal control PCB. Therefore, it is not possible to measure the coil
resistance, and the following procedure should be used to check the motor.
To perform diagnosis, follow the instructions in "(2) Checking the Outdoor Unit" on the previous page and set
the outdoor unit to Test Run mode (compressor ON, outdoor fan motor ON).
Important:
(A) Turn OFF the power before connecting or disconnecting the motor connectors.
(B) When performing voltage measurement at the outdoor controller connector for (3) in the table
below, the DC motor will trip and voltage output will stop approximately 10 seconds after
operation is started. For this reason, to measure the voltage again, first turn OFF the outdoor
unit power, then follow the instructions in "Checking the Outdoor Unit" and again set the unit to
Test Run mode.
[Trouble symptom 1] The fan does not stop when the outdoor unit stops. Outdoor unit controller trouble
[Trouble symptom 2] The fan motor does not rotate when the outdoor unit is operating.
(Diagnostic procedure)
* Disconnect the motor connectors and measure the voltage at the DC motor connectors on the outdoor
unit controller (3 locations).
Measurement location
Normal value
(1) Vs-Gnd: Between pin 1 and pin 4
(2) Vcc-Gnd: Between pin 5 and pin 4
(3) Vsp-Gnd: Between pin 7 and pin 4
DC 230V or more
DC 14V or more
After fluctuating 4 times between DC 1.0 to 4.3V
(1 sec. ON) and DC 0 V (1 sec. OFF), the DC
motor trips.
(Diagnostic results)
All of the above measured values are normal. Fan motor trouble (Replace the motor.)
Any one of the above measured values is not normal. Outdoor unit controller trouble
(Replace the controller .)
(Reference)
DC motor connector pin arrangement
Pin 1: Vs (white)
Pin 2: Not used
Pin 3: Not used
Pin 4: Gnd (black)
Pin 5: Vcc (red)
Pin 6: FG (blue)
Pin 7: Vsp (yellow)
[Trouble symptom 3] Motor rotates for some time (several seconds), but then quickly stops, when the outdoor
unit operates.
(There is trouble in the system that provides feedback of motor rotation speed from the
motor to the outdoor unit controller.)
[Trouble symptom 4] Fan motor rotation speed does not change during outdoor unit operation.
[Trouble symptom 5] Fan motor rotation speed varies excessively during outdoor unit operation.
(Remedy for symptom 3 to 5)
It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble.
Therefore, first replace the outdoor unit controller, then (if necessary) replace the DC motor.
53
10-5. 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.
54
11. CHECKING ELECTRICAL COMPONENTS
11-1. Measurement of Insulation
Ground wire
Resistance
Clip
The insulation is in good condition if the resistance
exceeds 1M ohm.
Probe
11-1-1. Power Supply Cord
Insulation
tester
Clamp the grounding wire of power cord with the lead
Fig. 1
clip of the insulation resistance tester and measure the
resistance by placing a probe on either of the two
power wires. (Fig. 1)
Terminal plate
Then also measure the resistance between the
grounding and other power terminals. (Fig. 1)
Probe
11-1-2. Indoor Unit
Clamp an aluminum plate fin or copper tube with the
lead clip of the insulation resistance tester and
measure the resistance by placing a probe on each
terminal screw on the terminal plate. (Fig. 2)
Note that the ground line terminal should be skipped
for the check.
Clip
Copper
tube or
Insulation
tester
metallic part
11-1-3. Outdoor Unit
Fig. 2
Clamp a metallic part of the unit with the lead clip of
the insulation resistance tester and measure the
resistance by placing a probe on each terminal screw
where power supply lines are connected on the
terminal plate. (Fig. 2)
Probe
Clip
11-1-4. Measurement of Insulation
Resistance for Electrical Parts
Copper
tube or
Disconnect the lead wires of the desired electric part
from terminal plate, capacitor, etc. Similarly disconnect
the connector. Then measure the insulation resistance.
(Figs. 3 and 4)
metallic part
Insulation
tester
Fig. 3
NOTE
From fan motor,
compressor and
other parts
Refer to Electric Wiring Diagram.
If the probe cannot enter the poles because the hole is
too narrow then use a probe with a thinner pin.
Probe
Metallic
part
Clip
Insulation
tester
Fig. 4
55
11-2. Checking Continuity of Fuse
on PCB Ass'y
Fuse
Remove the PCB Ass'y from the electrical
component box. Then pull out the fuse from the PCB
Ass'y. (Fig. 5)
Check for continuity using a multimeter as shown in
Fig. 6.
PCB Ass'y
Fig. 5
Fuse
Fig. 6
56
12. REFRIGERANT R410A:
SPECIAL PRECAUTIONS WHEN SERVICING UNIT
12-1. Characteristics of New Refrigerant R410A
12-1-1. What is New Refrigerant R410A?
R410A is a new refrigerant that contains two types of pseudo-non-azeotropic refrigerant mixture. Its
refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant, R22.
12-1-2. Components (mixing proportions)
HFC32 (50%) / HFC125 (50%)
12-1-3. Characteristics
Less toxic, more chemically stable refrigerant
The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase. Thus, when
there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in
composition of the remaining refrigerant. Therefore, do not add new refrigerant. Instead, recover the
remaining refrigerant with the refrigerant recovery unit. Then, after evacuation, totally recharge the specified
amount of refrigerant with the new refrigerant at its normal mixed composition state (in liquid phase).
When refrigerant R410A is used, the composition will differ depending on whether it is in gaseous or liquid
phase, and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in
gaseous state. Thus, always charge the refrigerant while it is in liquid phase.
Ether-type oil is used for compressor oil for R410A-type units, which is different
CAUTION
from the mineral oil used for R22. Thus more attention to moisture prevention and
faster replacement work compared with conventional models are required.
57
12-2. Checklist before Servicing
Use a clutch-type flare tool for R410A or the conventional flare tool. Note that sizes of the resultant flares differ
between these two tools. Where a conventional flare tool is used, make sure to observe A Specification (amount of
extrusion) by using the flare spacer.
Specification A
Diameter of tube D
Flare tool for R410A
Conventional flare tool (for R22)
Dia.1/4" (6.35 mm)
Dia.3/8" (9.52 mm)
Dia.1/2" (12.7 mm)
Dia.5/8" (15.2 mm)
0 to 0.0196"
0.0472"
(0 to 0.5 mm)
(1.2 mm)
Size of flare
Spacer
D
D
A
A
Flare tool for R410A
Conventional flare tool (R22)
Tubing precautions
Refrigerant R410A is more easily affected by dust or moisture compared with R22, thus be sure to temporarily
cover the ends of the tubing with caps or tape prior to installation.
Never use 0.0276" (0.7 mm)-thick copper tubing or tubing which is less than 0.0315" (0.8 mm) in thickness, since
air conditioners with R410A are subject to higher pressure than those using R22 and R407C.
No addition of compressor oil for R410A
No additional charge of compressor oil is permitted.
No use of refrigerant other than R410A
Never use a refrigerant other than R410A.
If refrigerant R410A is exposed to fire
Through welding, etc., toxic gas may be released when R410A refrigerant is exposed to fire. Therefore, be sure
to provide ample ventilation during installation work.
Caution in case of R410A leak
Check for possible leak points with the special leak detector for R410A. If a leak occurs inside the room,
immediately provide thorough ventilation.
58
12-3. Tools Specifically for R410A
For servicing, use the following tools for R410A
Tool Distinction
Gauge manifold
Tool Name
Charging hose
Gas leak detector
Refrigerant cylinder
Charging cylinder
Refrigerant recovery unit
Vacuum pump with anti-reverse flow (*1)
(Solenoid valve-installed type, which prevents oil from flowing back into the
unit when the power is off, is recommended.)
Vacuum pump (*2)...can be used if the following adapter is attached.
Vacuum pump adapter (reverse-flow prevention adapter) (*3).
(Solenoid valve-installed adapter attached to a conventional vacuum pump.)
Electronic scale for charging refrigerant
Flare tool
Tools specifically for R410A
Bender
Tools which can be com-
monly used for R22,
R407C, and R410A
Torque wrench
Cutter, reamer
Welding tool, nitrogen gas cylinder
The above tools specifically for R410A must not be used for R22 and R407C.
Doing so will cause malfunction of the unit.
CAUTION
For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for
R22-type units can be used for R410A-type. However, they must be used
exclusively for R410A and never alternately with R22 and R407C.
To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external
diameter of the service port screw has been altered.
<External diameter of service port> R410A : 5/16"
R22, R407C : 1/4"
12-4. Tubing Installation Procedures
When the tubes are connected, always apply HAB oil on the flare portions to improve the sealing of tubing.
The following is the HAB oil generally used:
Esso: ZERICE S32
NOTE
For details on tubing installation procedures, refer to the installation manuals attached to the indoor
unit and outdoor unit.
59
12-5. In Case of Compressor Malfunction
Should the compressor malfunction, be sure to make the switch to a replacement
compressor as quickly as possible.
CAUTION
Use only the tools indicated exclusively for R410A. See "12-3. Tools
Specifically for R410A."
12-5-1. Procedure for Replacing Compressor
(1) Recovering refrigerant
Any remaining refrigerant inside the unit should not be
released to the atmosphere, but recovered using the
refrigerant recovery unit for R410A.
(1) Recover refrigerant
OK
Do not reuse the recovered refrigerant, since it will contain
impurities.
(2) Replacing Compressor
(2) Replace compressor
OK
Soon after removing seals of both discharge and suction
tubes of the new compressor, replace it quickly.
(3) Checking for sealing
Use nitrogen gas for the pressurized gas, and never use a
refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(3) Check for sealing
OK
(4) Evacuation
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
(4) Evacuation
OK
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
When using a vacuum pump with exhaust air volume more
than 0.883 cu.ft./min. and ultimate vacuum pressure rate
of 50 micron Hg.
(5) Recharge
Standard time for evacuation
Length of tubing
Less than 33 ft. (10 m)
More than 33 ft. (10 m)
Evacuation time
More than 10 minutes
More than 15 minutes
60
(5) Recharging
Be sure to charge the specified amount of
Configuration and characteristics of cylinders
Valve
refrigerant in liquid state using the service port
of the wide tube service valve. The proper
amount is listed on the unit's nameplate.
When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.
Liquid
Never charge a large amount
CAUTION
of liquid refrigerant at once to
the unit. This may cause
damage to the compressor.
Single valve
Charge liquid refrigerant with
cylinder in up-side-down position.
When charging with a refrigerant cylinder, use an
electronic scale for charging refrigerant. In this
case, if the volume of refrigerant in the cylinder
becomes less than 20% of the fully-charged
amount, the composition of the refrigerant starts
to change. Thus, do not use the refrigerant if
the amount in the charging cylinder is less
than 20%.
Fig. 1
Valve
Also, charge the minimum necessary amount to
the charging cylinder before using it to charge
the air conditioning unit.
Example:
Liquid
In case of charging refrigerant to a unit requiring
1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10
Kg) cylinder, the minimum necessary amount for
the cylinder is:
Single valve (with siphon tube)
Charge with cylinder in normal position.
1.68 + 22 0.20 = 6.08 lb.
(0.76 + 10 0.20 = 2.76 Kg)
Fig. 2
For the remaining refrigerant, refer to the
instructions of the refrigerant manufacturer.
NO!
If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.
Charging
cylinder
Prepare an evacuated charging cylinder
beforehand.
To prevent the composition
CAUTION
of R410A from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the
refrigerant. (Fig. 3)
Liquid
Open
Refrigerant
cylinder
Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.
Fig. 3
61
12-6. In Case Refrigerant is Leaking
Never attempt to charge additional refrigerant when refrigerant has been leaking
from the unit. Follow the procedure described below to locate points of leaks and
carry out repairs, then recharge the refrigerant.
CAUTION
(1) Detecting Leaks
Use the detector for R410A to locate refrigerant leak
points.
(1) Detect leaks
(2) Recovering refrigerant
Never release the gas to the atmosphere; recover
OK
residual refrigerant using the refrigerant recovery unit for
R410A, instead.
(2) Recover refrigerant
Do not reuse the recovered refrigerant because its
composition will have been altered.
OK
(3) Welding leaking points
Confirm again that no residual refrigerant exists in the unit
before starting welding.
(3) Weld leaking points
OK
Weld securely using flux and wax for R410A.
Prevent oxide film from forming inside the tubes utilizing
substitution with nitrogen (N2) in the refrigerant circuit of
the unit. Leave ends of tubes open during welding.
(4) Checking for sealing
(4) Check for sealing
OK
Use nitrogen gas for the pressurized gas, and never use
a refrigerant other than R410A. Also do not use oxygen or
any flammable gas.
(5) Evacuation
(5) Evacuation
OK
Use a solenoid valve-installed vacuum pump so that
even if power is cut off in the middle of evacuation of air
due to a power interruption, the valve will prevent the
pump oil from flowing back.
The equipment may be damaged if moisture remains in
the tubing, thus carry out the evacuation thoroughly.
(6) Recharge
When using a vacuum pump with exhaust air volume
more than 0.883 cu.ft./min. and ultimate vacuum pressure
rate of 50 micron Hg.
Standard time for evacuation
Length of tubing
Less than 33 ft. (10 m)
More than 33 ft. (10 m)
Evacuation time
More than 10 minutes
More than 15 minutes
(6) Recharging
Recharge unit in the same manner explained on the
previous page "(5) Recharging."
62
12-7. Charging Additional Refrigerant
12-7-1. When Tubes are Extended
Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came
with the indoor unit. Charge additional refrigerant in liquid state only.
Never charge additional refrigerant if refrigerant is leaking from the unit. Follow
CAUTION
instructions given in "12-6. In Case Refrigerant is Leaking" and completely carry
out repairs. Only then should you recharge the refrigerant.
12-8. Retro-Fitting Existing Systems
12-8-1. Use of Existing Units
Never use new refrigerant R410A for existing units which use R22. This will cause the air conditioner to
operate improperly and may result in a hazardous condition.
12-8-2. Use of Existing Tubing
If replacing an older unit that used refrigerant R22 with a R410A unit, do not use its existing tubing. Instead,
completely new tubing must be used.
63
APPENDIX INSTRUCTION MANUAL
KS1872 + C1872
+ CL1872
KS2472 + C2472
+ CL2472
(OI-852-6-4180-800-00-0)
64
Features
This air conditioner is an inverter type unit that automatically adjusts capacity as appropriate. Details on these functions
are provided below; refer to these descriptions when using the air conditioner.
•
Microprocessor Controlled Operation
•
Automatic Restart Function for Power Failure
Even when power failure occurs, preset
programmed operation can be reactivated once
power resumes.
The interior compartment of the remote control unit
contains several features to facilitate automatic
operation, easy logically displayed for easy use.
•
•
•
•
Simple One-touch Wireless Remote Control
The remote control unit has several features to
facilitate automatic operation.
•
High Power Operation
The unit operates at maximum output for 30
minutes, regardless of the desired temperature.
The fan speed is 1 step above “High”.
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.
•
•
Quiet Operation
The fan rotates slower than the fan speed setting to
provide a quieter operating sound.
1-Hour OFF Timer
This timer can be set to automatically turn off the
unit at any time after one hour.
ION Operation
While it is operating, the unit generates negative
ions that freshen up the air in the room.
Night Setback
Pressing this button changes the setting of the
room temperature thermostat, allowing you to set
the temperature at whatever level that you find
comfortable.
•
•
Anti-Mold Filter
This unit is equipped with an anti-mold filter that
inhibits the growth of mold and bacteria.
•
•
Automatic and 3-step Fan Speed
Air Clean Filter
Auto/High/Medium/Low
An air filter that eliminates unpleasant odors and
cleans the air is available.
Purchase a replacement filter at your local dealer.
(model STK-FDXB)
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.
•
Auto. Flap Control
This automatically sets the flap to the optimum
position during cooling and drying operation.
OI-800-2-EG
2
Contents
Page
Features............................................................................................................ 2
Product Information........................................................................................... 3
Alert Symbols.................................................................................................... 3
Installation Location .......................................................................................... 4
Electrical Requirements.................................................................................... 4
Safety Instructions............................................................................................. 4
Names of Parts ................................................................................................. 5
Using the Remote Control Unit ....................................................................... 10
Operation with the Remote Control Unit ........................................................ 12
1. Operation ............................................................................................... 12
2. Adjusting the Fan Speed........................................................................ 13
3. Fan Only................................................................................................. 13
4. Night Setback Mode............................................................................... 14
5. QUIET Mode.......................................................................................... 15
6. HIGH POWER Mode ............................................................................. 15
7. ION Mode............................................................................................... 15
Special Remarks............................................................................................. 16
Setting the Timer............................................................................................. 17
Using the 1-Hour OFF Timer .......................................................................... 19
Tips for Energy Saving.................................................................................... 19
Adjusting the Airflow Direction ........................................................................ 20
Operation without the Remote Control Unit .................................................... 21
Care and Cleaning.......................................................................................... 21
Troubleshooting............................................................................................... 24
Operating Range............................................................................................. 24
Product Information
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.
Model No. ______________________ Serial No. ____________________
Date of purchase ________________________________________________
Dealer’s address ________________________________________________
Phone number ________________
Alert Symbols
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.
This symbol refers to a hazard or unsafe
CAUTION
practice which can result in personal injury
or product or property damage.
OI-800-3-EG
3
Installation Location
•
We recommend that this air conditioner be installed properly by qualified
installation technicians in accordance with the Installation Instructions
provided with the unit.
•
Before installation, check that the voltage of the electric supply in your home or
office is the same as the voltage shown on the nameplate.
•
•
Do not install this air conditioner where there are fumes or flammable
gases, or in an extremely humid space such as a greenhouse.
Do not install the air conditioner where excessively high heat-generating
objects are placed.
Avoid: To protect the air conditioner from heavy corrosion, avoid installing the outdoor
unit where salty sea water can splash directly onto it or in sulphurous air near a
spa.
Electrical Requirements
1. All wiring must conform to the local electrical codes. Consult your dealer or a
qualified electrician for details.
2. Each unit must be properly grounded with a ground (or earth) wire or through
the supply wiring.
3. Wiring must be done by a qualified electrician.
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.
•
•
•
Never use or store gasoline or other flammable vapor or liquid near the
air conditioner — it is very dangerous.
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 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 let children play with the air conditioner.
CAUTION
•
•
Do not cool the room too much if babies or invalids are present.
OI-800-4-EG
4
Names of Parts
Air intakes
INDOOR UNIT
Air outlet
Remote control unit
Drain hose
Refrigerant tubes
OUTDOOR UNIT
Air outlet
This illustration is based on the external view of a standard model.
Consequently, the shape may differ from that of the air conditioner which you
have selected.
NOTE
This air conditioner consists of an indoor unit and an outdoor unit. You can control
the air conditioner with the remote control unit.
Air Intake Air from the room is drawn into this section and passes through air filters which
remove dust.
Air Outlet Conditioned air is blown out of the air conditioner through the air outlet.
Remote Control Unit The wireless remote control unit controls power ON/OFF, operation mode
selection, temperature, fan speed, timer setting, and air sweeping.
Refrigerant Tubes The indoor and outdoor units are connected by copper tubes through which
refrigerant gas flows.
Drain Hose Moisture in the room condenses and drains off through this hose.
Outdoor (Condensing) Unit The outdoor unit contains the compressor, fan motor, heat exchanger coil, and
other electrical components.
OI-800-5-EG
5
Unit Display and Operation Button
INDOOR UNIT
IMPORTANT
OPERATION lamp
TIMER lamp
QUIET lamp
ION lamp
Avoid using radio equipment
such as mobile phone near
(within 4 ft.) the remote
control receiver. Some radio
equipment may cause
QUIET
OPERATION button
malfunction of the unit.
If the trouble happens,
disconnect power and restart
the air conditioner after a few
minutes.
REMOTE CONTROL receiver
REMOTE CONTROL receiver This section picks up infrared signals from the remote control unit (transmitter).
OPERATION button When the remote control cannot be used, pressing this button enables cooling
operation.
Each time this button is pressed, the operation mode changes cyclically.
Cooling operation
Stop
OPERATION lamp This lamp lights when the system is in the continuous DRY (orange), COOL
(green) and FAN (green) mode.
TIMER lamp This lamp lights when the system is being controlled by the timer.
QUIET lamp This lamp lights during operation in the QUIET mode.
ION lamp This lamp lights during operation in the ION mode while the indoor unit is
operating.
The unit’s display lamps are dimmed during operation in the NIGHT SETBACK
mode.
NOTE
OI-800-6-EG
6
Remote Control Unit (Display)
Displayed when transmitting data
Displayed when indoor unit sensor
is in use
Displayed when setting
temperature
Displayed when temperature is
shown
Displayed when setting timer
Displayed when the
time display is set to
12-hour time.
Symbols
(1) Operation mode
(4) Timer
24-hour clock with ON/OFF
MILD DRY ..............................
COOL.....................................
FAN ........................................
program Timer........................
ON Timer................................
OFF Timer..............................
1-hour OFF Timer...................
(2) Fan speed
Automatic operation ...............
(5) NIGHT SETBACK ..................
HIGH .....................................
MEDIUM.................................
LOW.......................................
(6) Confirmation of
transmission...........................
(7) Auto. fla.dication.....................
Flap angle indication ..............
Sweep indication....................
(8) High power operation.............
(9) Quiet operation.......................
(10) ION operation.......................
(3) Temperature setting
60 – 86 °F
When set to 80 °F
temperature indication............
OI-800-7-EG
7
Remote Control Unit
Sensor
Transmitter
(Cover closed)
Display
ON/OFF operation button
1 HR. TIMER button
ION button
Temperature setting buttons (TEMP.)
MODE selector button
NIGHT SETBACK button
HIGH POWER button
QUIET button
FAN SPEED selector button
FLAP button
ON TIME
setting
buttons
Advance button
Return button
OFF TIME
setting
buttons
Advance button
Return button
CLOCK button
CANCEL button
SENSOR button
Time display selector button
ACL button
ADDRESS switch
Temperature display
selector button
The illustration above pictures the remote control unit after the cover has been
opened.
NOTE
Transmitter When you press the buttons on the remote control unit, the
mark appears in
the display to transmit the setting changes to the receiver in the air conditioner.
Sensor A temperature sensor inside the remote control unit senses the room
temperature.
Display Information on the operating conditions is displayed while the remote control unit
is switched on. If the unit is turned off, FLAP setting and FAN SPEED setting are
not displayed.
ION button
: This button is for turning the negative ions generated during operation on
and off.
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.
OI-800-8-EG
8
Remote Control Unit (continued)
Temperature setting buttons Press the
(TEMP.) Press the
button to increase the set temperature.
button to reduce the set temperature.
The temperature setting changes by 1 °C or 2 °F each time one of the TEMP.
buttons is pressed.
QUIET button
: When you press this button, the fan rotates slower than the fan speed
setting to provide a quieter operating sound.
MODE selector button Use this button to select DRY, COOL or FAN mode.
(DRY)
(COOL)
(FAN)
: The air conditioner reduces the humidity in the room.
: The air conditioner makes the room cooler.
: The air conditioner works only as a circulation fan.
FAN SPEED selector button
: The air conditioner automatically decides the fan speeds.
: High fan speed
: Medium fan speed
: Low fan speed
NIGHT SETBACK button For details, see “4. Night Setback Mode”. When you press this button in the DRY
or COOL mode, the mark appears in the display, and the remote control unit
will automatically adjust the set temperature to save energy.
FLAP button Press this button either to select the setting of the airflow direction to the auto.
flap in each mode or one of the six possible positions manually or to select the
sweep function which moves the flap up and down automatically.
: Auto flap setting: If selected in a cooling or dry operation, the flap is set at
position (7) in the following chart.
: The airflow direction can be set manually. (six positions)
: The flap moves up and down automatically.
When you press the FLAP button, the air flow direction will be changed one by
one as follows.
NOTE
SWEEP
HIGH POWER button
: If this button is pressed during DRY, COOL or FAN operation, the unit
operates at maximum output for 30 minutes, regardless of the desired
temperature.
The fan speed is 1 step above “High”.
ON TIME/OFF TIME setting No display: The timer does not operate.
buttons
: The air conditioner starts at the set time.
: The air conditioner stops at the set time.
: The air conditioner stops and starts, or starts and stops, at the
set times every day. For details, see “Setting the Timer”.
OI-800-9-EG
9
Remote Control Unit (continued)
SENSOR button When you press this button (use a small-tipped object such as a ballpoint pen),
the
mark will appear at the display. And the room temperature is detected by
the sensor which is built into the indoor unit and the air conditioner is controlled
accordingly.
If the remote control 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
Temperature Display Selector button This switches the temperature display between °C and °F.
Time Display Selector button This switches the time display between 24-hour time and 12-hour time.
ACL button (ALL CLEAR) Puts the remote control unit into pre-operation status. Always press this button
after replacing the batteries.
ADDRESS switch
•
The address switch changes to prevent mixing of signals from remote control
units 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 control unit should not be bent.
The remote control unit sends the temperature signal to the air conditioner regularly at five minute
intervals. If the signal from the remote control unit stops for more than 15 minutes due to the loss of the
remote control unit 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
control unit may differ from the temperature detected at the air conditioner’s position.
NOTE
Using the Remote Control Unit
How to Install Batteries
1. Slide the cover in the direction
indicated by the arrow and remove it.
2. Install two AAA alkaline batteries.
Make sure the batteries point in the
direction marked in the battery
compartment.
3. Use a thin object such as the tip of a
pen to press the ACL button.
ACL button
•
The batteries last about six months, depending on how much you use
the remote control unit. Replace the batteries when the remote control
unit’s display fails to light, or when the remote control cannot be used to
change the air conditioner’s settings.
NOTE
•
•
Use two fresh leak-proof type-AAA alkaline batteries.
In replacing batteries, follow the instructions as mentioned in the sub-
section “How to Install Batteries”.
•
If you do not use the remote control unit more than 1 month, take out the
batteries.
OI-800-10-EG
10
Using the Remote Control Unit (continued)
How to Use the Remote When using the remote control unit, always point the unit’s transmitter head
Control Unit directly at the air conditioner’s receiver.
Air conditioner
(Indoor unit)
Receiver
Remote control
unit
(Transmitter head)
Remote Control Unit The remote control unit may be operated either from a non-fixed position or from
Installation Position a wall-mounted position. To ensure that the air conditioner operates correctly, DO
NOT install the remote control unit in the following places:
DO NOT
•
•
•
•
•
•
•
In direct sunlight
Behind a curtain or other places where it is covered
More than 26 feet (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 control unit and air conditioner
(since a check signal is sent from the remote control unit every 5 minutes)
Mounting the Remote Control Before mounting the remote control unit, press the ON/OFF operation button at
Unit 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
unit mount
Press
Mounting screws
5/32 x 5/8" (4 x 16 mm)
(included)
Hole
Set in
place
• To prevent loss of the remote control unit,
you can connect the remote control unit to
the mount by passing a string through the
remote control unit and attachment hole.
To take out the remote control unit, pull it forward.
When Holding the Remote
Control Unit
•
When using the remote control unit and during air conditioner operation, the
transmitter on the remote control unit should be pointed toward the receiver on
the indoor unit.
•
Make sure that there are no objects between the remote control unit and
receiver which could block the signal.
OI-800-11-EG
11
Operation with the Remote Control
Unit
1. Operation
STEP 2
STEP 3
STEP 1
STEP 4
STEP 5
Check that the circuit breaker on the power panel is turned on.
Press the setting buttons as described below and change the settings as desired.
NOTE
STEP 1
Press the MODE selector button and select the desired mode.
For dehumidifying operation
For cooling operation
For fan only operation
→
→
→
STEP 2
STEP 3
To start the air conditioner, press the ON/OFF operation button.
Press the TEMP. setting buttons to change the temperature
setting to the desired temperature.
Adjustable temperature range:
30 °C max.
16 °C min.
or
86 °F max.
60 °F min.
STEP 4
STEP 5
Set the FAN SPEED selector button to the setting you want.
Press the FLAP button and set the airflow direction as desired.
(Refer to “Adjusting the Airflow Direction” on page 20.)
To stop the air conditioner, press the ON/OFF operation button again.
OI-800-12-EG
12
Operation with the Remote Control Unit (continued)
•
Choose the best position in the room for the remote control unit, 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 control unit
there.
NOTE
•
This appliance has a built-in 5-minute time delay circuit to ensure reliable
operation. When the operation button is pressed, the compressor will start
running within three minutes. In the event of power failure, the unit will stop.
2. Adjusting the Fan Speed
A. Automatic fan speed
Simply set the FAN SPEED selector button to the
position.
This automatically sets the best fan speed for the room temperature.
B. Manual fan speed
3. Fan Only
If you want to adjust fan speed manually during operation, just set the FAN
SPEED selector button as desired. [
,
, or
]
STEP 2
STEP 1
STEP 3
If you want to circulate air without any temperature control, follow these steps:
STEP 1
STEP 2
STEP 3
Press the MODE selector button to switch to the fan mode
Press the ON/OFF operation button.
.
Press the FAN SPEED selector button to select the fan speed of
your choice ( or ).
,
OI-800-13-EG
13
Operation with the Remote Control Unit (continued)
4. Night Setback Mode
Night Setback Mode is used for saving energy.
Press the NIGHT SETBACK button while operation.
The
mark appears in the display.
To release the night setback function, press the NIGHT SETBACK button again.
In Cooling and DRY
Mode: ( and
When the night setback mode is selected, the air conditioner automatically
raises the temperature setting 2 °F when 30 minutes have passed after the
selection was made, and then another 2 °F after another 30 minutes have
passed, regardless of the indoor temperature when night setback was
selected. This enables you to save energy without sacrificing comfort. This
function is convenient when gentle cooling is needed.
)
2 °F
Setting
temperature
2 °F
30 min.
30 min.
Press the NIGHT
SETBACK button
Time
OI-800-14-EG
14
Operation with the Remote Control Unit (continued)
5. QUIET Mode
QUIET Mode is used to reduce the fan sound of the indoor unit.
Press the QUIET button.
The
mark appears in the display.
To cancel, press QUIET button again.
•
•
In QUIET Mode, the fan rotates at a slower speed than the fan speed setting.
If the unit is already operating with a very low airflow, the fan sound may not
change even if the QUIET button is pressed.
6. HIGH POWER Mode
HIGH POWER mode can be used to increase the output of the indoor unit for all
operation modes.
Press the HIGH POWER button.
The
mark appears in the display.
To cancel, press HIGH POWER button again.
•
•
When the HIGH POWER button is pressed, the unit operates at maximum
output for 30 minutes, regardless of the desired temperature. The fan speed is
1 step above “High”.
QUIET Mode and HIGH POWER Mode cannot be used at the same time.
• Depending on the operating conditions, the fan speed may be
increased by a small amount only.
NOTE
7. ION Mode
The ION mode is used during operation to generate negative ions that freshen up
the air in the room.
Press the ION button.
The
mark appears in the display.
To cancel, press ION button again.
•
•
•
The indoor unit’s ION lamp lights up while negative ions are being generated.
ION “on” is the remote control unit’s initial setting.
The negative ions are generated from the negative ion generator.
OI-800-15-EG
15
Special Remarks
‘‘DRY’’ ( ) Operation
How it works?
•
•
•
Once the room temperature reaches the level that was set, the unit’s operation
frequency is changed automatically.
During DRY operation, the fan speed automatically runs at lower speed for
providing a comfortable breeze.
‘‘DRY’’ operation is not possible if the indoor temperature is 59 °F or less.
Cooling ( ) Operation
•
Sometimes the indoor unit may not get to the set fan speed such as LOW and
QUIET under cool operation at very low outdoor temperatures due to the
indoor unit being protected from ice or frost when combined with the outdoor
unit for Low Ambient Cooling models.
•
In the event of power failure, the unit will stop. When the power is resumed,
the unit will restart automatically within five minutes by the remote control unit.
Power failure during
operation
Clicking Sound
Clicking sound is heard from
the air conditioner
•
•
In cooling operation, any plastic parts may shrink due to a sudden
temperature change. In this event, a clicking sound may occur. This is normal,
and the sound will soon disappear.
The remote control unit sends the setting condition to the air conditioner
regularly at five minute intervals.
Remote Control Unit
OI-800-16-EG
16
Setting the Timer
In the descriptions below, the following settings are used for the temperature and
time indicator selector button on the bottom front section of the remote control.
NOTE
•
•
Temperature: °F
Time: AM, PM
(Example) To set to 10:30 pm.
1. How to set the present
time
Operation
Indication
1. Press the CLOCK button once if
The time indication alone flashes.
the time indicator is not flashing.
2. Press the Advance, Return ( ,
) button until PM 10:30 is
displayed.
The time can be set in 1-minute
increments. Holding down the button
advances the time rapidly in 10-minute
increments.
3. Press the CLOCK button again.
This completes the setting of the
current time.
(Example) To stop the air conditioner at 11:00 am.
2. How to set the OFF time
1. Press the OFF TIME setting
The timer
indication is displayed,
button once.
and the present OFF time is shown.
2. Press the Advance, Return ( ,
) button until AM 11:00 is
displayed.
The timer indication blinks.
The time can be set in 10-minute
increments. Holding down the button
advances the time rapidly in 10-minute
increments.
3. Wait a few seconds, and then the The timer
indication stops
setting is complete.
blinking and the present time is
displayed.
OI-800-17-EG
17
Setting the Timer (continued)
(Example) To start operation at 7:10 am.
3. How to set the ON time
Operation
Indication
1. Press the ON TIME setting
The timer
indication is displayed,
button once.
and the present ON time is shown.
2. Press the Advance, Return ( ,
) button until AM 7:10 is
displayed.
The timer
indication blinks.
The time can be set in 10-minute
increments. Holding down the button
advances the time rapidly in 10-minute
increments.
3. Wait a few seconds, and then
The timer
indication stops
the setting is complete.
blinking and the present time is
displayed.
(Example) To start operation at 7:10 am. and stop the air conditioner at 11:00 am.
4. How to set DAILY ON/OFF
REPEAT timer
10:30 pm.
Present time
7:10 am.
ON
11:00 am.
OFF
1. Set the timer ON/OFF times as
The present time 10:30 pm. and
are displayed.
shown in 2-1, 2, 3 and 3-1, 2, 3.
•
The ON/OFF combination timer uses the current time as the
reference, and it is activated starting from whichever set time
comes first.
NOTE
•
•
With the ON/OFF combination timer, the settings are repeated
every day.
You can check the timer ON/OFF times after you have set them
by pressing the ON TIME and OFF TIME setting buttons.
To cancel a timer program
•
•
Press the CANCEL button.
When either an ON or OFF timer is to be canceled, press the button
corresponding to the timer whose program is to be canceled, and then press
the CANCEL button.
•
•
The airflow direction, fan speed and temperature setting can be changed after
a timer program has been set even when the unit is stopped. Even when
operation is stopped during an ON timer program, the unit will start operating
when the set time is reached provided that the program is not canceled.
When the ON timer and OFF timer are set to the same time, the timer
operates as if it is turned off.
NOTE
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Using the 1-Hour OFF Timer
1. 1-Hour OFF Timer This function causes the unit to operate for one hour and then stop,
regardless of whether the unit is on or off when this button is pressed.
The
indicator in the display indicates that this function is operating.
Setting procedure:
Regardless of whether the unit is operating or stopped, press the 1 HR. TIMER
button.
appears in the display.
Cancellation procedure:
Press the ON/OFF operation button to turn the unit off, wait for the unit to stop
operating, and then press the ON/OFF operation button again.
The 1-Hour Timer function is now cancelled and the unit operates normally.
•
•
If, while the 1-Hour Timer function is operating, the 1HR. TIMER button is
pressed once to cancel the function and then again, the unit continues to
operate for one hour from that point in time and then stops.
It is not possible to use the OFF Timer and 1-Hour OFF Timer together.
Whichever function is set last takes precedence. If the 1 HR. TIMER button is
pressed while the TIMER OFF function operates, the OFF Timer is cancelled
and the unit will stop operating one hour later.
NOTE
2. Operation together with the The 1-Hour OFF Timer setting is given priority over the DAILY ON/OFF REPEAT
DAILY ON/OFF REPEAT Timer setting.
Tips for Energy Saving
Do not
•
Block the air intake and outlet of the unit. If they are obstructed, the unit
will not work well, and may be damaged.
•
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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Adjusting the Airflow Direction
1. Horizontal The horizontal airflow can be adjusted by moving the vertical vanes with your
hands to the left or right.
When the humidity is high, the vertical vanes should be in the front
CAUTION
position during the cooling or dehumidifying operation. If the vertical
vanes are positioned all of the way to the right or left, condensation may
begin to form around the air vent and drip down.
2. Vertical The vertical airflow can be adjusted by moving the flap with the remote control
unit. Do not move the flap with your hands. Confirm that the remote control unit
has been turned on. Use the FLAP button to set either the sweep function or one
of the six airflow direction settings.
COOL
SWEEP
DRY
FAN
A. Sweep function
B. Setting the airflow manually
Referring to the above illustration, use the
The flap starts moving up and down to
deliver air over the sweep range.
FLAP button to set the airflow direction
within the range used during the cooling or
dehumidifying operation.
C. Auto flap function
The flap is set to the recommended
position.
•
The flap automatically closes when the unit is off.
NOTE
•
Use the FLAP button on the remote control to adjust the position of the
flap. If you move the flap by hand, the flap position according to the
remote control 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.
CAUTION
•
Do not have the flap pointed down during cooling operation.
Condensation may begin to form around the air vent and drip down.
OI-800-20-EG
20
Operation without the Remote
Control Unit
INDOOR UNIT
If you have lost the remote control unit or it has trouble, follow the steps
below.
When the air conditioner is not running
Each time the OPERATION button is pressed, the operation mode changes
cyclically.
Cooling operation
Stop
OPERATION button
The temperature is set to the room temperature minus 4 °F during the cooling
operation, and the fan speed and flap are set to Auto.
NOTE
Care and Cleaning
1. For safety, be sure to turn the air conditioner off and also to disconnect
the power before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the
internal components and cause an electric shock hazard.
Casing and Grille (Indoor Unit) Clean the casing and grille of the indoor unit with a vacuum cleaner brush, or
wipe them with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with a mild liquid
detergent. When cleaning the grille, be careful not to force the vanes out of place.
1. Never use solvents, or harsh chemicals when cleaning the indoor unit.
CAUTION
Do not wipe the plastic casing using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if
handled improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be
cleaned every year. Consult your dealer or service center.
OI-800-21-EG
21
Care and Cleaning (continued)
Anti-Mold Filter The anti-mold filter behind the air intake grille should be checked and cleaned at
least once every two weeks.
How to remove the anti-mold 1. Grasp both ends of the air
Air intake grille
filter
intake grille, and remove it by
opening towards the front and
pulling towards you.
2. Remove the anti-mold filter
attached to the rear of the air
intake grille.
Anti-mold filter
Cleaning Use a vacuum cleaner to remove light dust. If there is sticky dust on the filter,
wash the filter in lukewarm, soapy water, rinse it in clean water, and dry it.
How to replace the anti-mold 1. With the FRONT mark of the
Anti-mold filter
filter
anti-mold filter at the front,
align the two indentions near
the mark with the hooks at the
rear of the air intake grille, and
then mount the anti-mold filter.
FRONT mark
Hook
2. Allow the edge of the air intake
grille to slide into the top of the
indoor unit, and then insert it
all the way inside.
Groove
Pin
Air intake grille
3. To attach the air intake grille to
the indoor unit, press its
bottom right and left corners as
well as its bottom center into
place.
Air intake grille
Attach so that the round pins at the top right and left corners of the air intake grille
are inserted into the grooves at the top right and left of the indoor unit.
NOTE
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Care and Cleaning (continued)
Air Clean Filter The air clean filter removes dust and dirt from the air, and reduces odors and
smoke from tobacco.
This air clean filter cannot remove harmful gases or vapors nor ventilate air in
the room. You must open doors or windows frequently when you use gas or oil
heating appliances. Otherwise there is a risk of suffocation in extreme cases.
How to install the air clean The air clean filter needs to be installed behind the air intake grille.
filter 1. Remove the air intake grille.
2. Install the air clean filter in the
position shown in the figure.
3. Remount the air intake grille.
Air clean
filter
How to clean the air clean filter
•
•
•
In general, the filter should be sucked to remove dust in low fan speed of a
vacuum cleaner once every three months.
If there is heavily grime on the filter, soak the filter in lukewarm water with
neutral detergent diluted 1:500 for 1 to 2 minutes then wash it.
Rinse the filter in clean water, then let it dry on the towel in room temperature.
•
•
Do not bend nor give excessive force onto the air clean filter.
If the filter surface is heavily blocked with dirt or damaged, replace it with new
one. Purchase a replacement filter at your local dealer. (model STK-FDXB)
NOTE
Cleaning the main unit and
remote control unit
•
•
Wipe clean using a soft, dry cloth.
To remove stubborn dirt, moisten a cloth in warm water no hotter than 104 °F,
wring thoroughly, and then wipe.
•
The air intake grille can be removed in order to wash it with water.
Removing and remounting the Refer to “How to remove the anti-mold filter” and “How to replace the anti-mold
air intake grille filter” on page 22.
When using a footstool or the like, be careful not to let it tip over.
CAUTION
Washing the grille with water
•
•
Clean the grille gently using a soft sponge, or the like. Then wipe away any
remaining moisture.
Neutral detergent may be used to remove stubborn dirt. Then rinse thoroughly
with water and wipe away any remaining moisture.
Cleaning the negative ion Follow the steps below when the
generator generator has become dirty.
For safety, be sure to turn the air
conditioner off and also to disconnect
the power before cleaning.
Remove the dust on the negative ion
generator.
•
•
Use a toothbrush, etc. to dust off the end.
Use a cotton swab, etc., to clean around
the generator inside the plastic case,
taking care not to touch the electrodes.
Negative ion generator
(metal electrodes inside
plastic case)
•
•
•
During use, the negative ion generator and other metal parts may become
discolored: this is normal and not indicative of malfunctioning.
If the dirt on and around the negative ion generator is left to build up, a puffing or
sputtering sound will eventually be heard. In this case, clean the generator immediately.
Do not apply excessive force while performing maintenance.
NOTE
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Troubleshooting
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not
work properly, contact your dealer or service center.
Trouble
Possible Cause
1. Power failure.
Remedy
1. Restore power.
Air conditioner does not run at all.
2. Leakage circuit breaker tripped.
2. Contact service center.
3. Consult your electrician or dealer.
4. Replace batteries.
3. Line voltage is too low.
4. Batteries in remote control unit have
run down.
OPERATION lamp blinks and air
conditioner does not operate.
Trouble in system.
Contact service center.
Compressor runs but soon stops.
Poor cooling performance.
Obstruction in front of condenser coil.
1. Dirty or clogged air filter.
Remove obstruction.
1. Clean air filter to improve airflow.
2. Eliminate heat source if possible.
3. Shut them to keep the heat out.
4. Remove it to ensure good airflow.
2. Heat source or many people in room.
3. Doors and/or windows are open.
4. Obstacle near air intake or air
discharge port.
5. Thermostat is set too high for cooling. 5. Set the temperature lower.
Clicking sound is heard from the air
conditioner.
In cooling operation, any plastic parts
may shrink due to a sudden
This is normal, and the sound will soon
disappear.
temperature change. In this event, a
clicking sound may occur.
OPERATION lamp lights but outdoor
unit will not run.
1. The use of cellular phones near the
air conditioner may cause
1. Turn off the power then restart the
air conditioner after a while.
disturbance to its normal operation.
2. Consult your dealer.
Operating Range
The air conditioner is operable within the temperature ranges as listed below:
For Cooling Only Models : C1872, C2472
Temperature
Indoor air temperature
Outdoor air temperature
COOLING
Max.
Min.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
67 °F DB
For Low Ambient Cooling Models : CL1872, CL2472
Temperature
Indoor air temperature
Outdoor air temperature
COOLING
Max.
Min.
95 °F DB / 71 °F WB
67 °F DB / 57 °F WB
115 °F DB
0 °F DB
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For Parts Service Contact
SANYO Fisher Service Company
A Division of SANYO North America Corporation
1165 Allgood Road, Suite 22, Marietta, GA 30062 U.S.A.
Sanyo Canada Inc.
1-300 Applewood Crescent, Concord, Ontario L4K 5C7, CANADA
Jan./2006 (T)
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