Order No. MAC0502036C1
Air Conditioner
CS-C18DKU CU-C18DKU
CS-C24DKU CU-C24DKU
CONTENTS
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Page |
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Page |
1 |
Features |
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2 |
5 |
Refrigeration Cycle Diagram |
13 |
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Functions |
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3 |
6 |
Block Diagram |
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3 |
Product Specifications |
6 |
7 |
Wiring Diagram |
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3.1. CS-C18DKU |
CU-C18DKU |
6 |
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Operation Details |
17 |
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3.2. CS-C24DKU |
CU-C24DKU |
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8.1. Cooling Operation |
17 |
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Dimensions |
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10 |
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8.2. Soft Dry Operation |
18 |
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4.1. Indoor Unit & Remote Control |
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8.3. Automatic Operation |
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4.2. Outdoor Unit |
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8.4. Operation Control |
20 |
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© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd |
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(11969-T). All rights reserved. Unauthorized copying |
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and distribution is a violation of law. |
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.5. Indoor Fan Speed Control |
23 |
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12.1. Indoor Electronic Controllers Removal Procedures |
52 |
8.6. Outdoor Fan Speed Control |
24 |
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12.2. Cross Flow Fan and Indoor Fan Motor Removal |
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8.7. Vertical Airflow Direction Control |
24 |
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Procedures |
53 |
8.8. Horizontal Airflow Direction Control |
25 |
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12.3. Remote Control Reset |
54 |
8.9. Powerful Operation |
25 |
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12.4. Auto OFF/ON Button |
55 |
8.10. Quiet Operation |
26 |
13 |
Troubleshooting Guide |
56 |
8.11. Economy Mode Operation |
27 |
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13.1. Refrigeration cycle system |
56 |
8.12. Timer Control |
27 |
14 |
Technical Data |
58 |
8.13. Random Auto Restart Control |
27 |
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14.1. Thermostat characteristics |
58 |
8.14. Remote Control Signal Receiving Sound |
28 |
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14.2. Operation characteristics |
59 |
9 Operating Instructions |
29 |
15 |
Exploded View (Indoor Unit) |
63 |
10 Installation Instructions |
35 |
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15.1. CS-C18DKU CS-C24DKU |
63 |
10.1. Safety Precautions |
35 |
16 |
Replacement Parts List (Indoor Unit) |
64 |
10.2. Indoor Unit |
38 |
17 |
Exploded View (Outdoor Unit) |
65 |
10.3. Outdoor Unit |
42 |
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17.1. CU-C18DKU |
65 |
11 3-way Valve |
45 |
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17.2. CU-C24DKU |
66 |
11.1. Evacuation of Installation |
46 |
18 |
Replacement Parts List (Outdoor Unit) |
67 |
11.2. Pumping down |
47 |
19 |
Electronic Circuit Diagram |
69 |
11.3. Evacuation of Re-installation |
48 |
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19.1. Indoor Unit & Outdoor Unit |
69 |
11.4. Balance refrigerant of the 3-way valves |
49 |
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19.2. Remote Control |
74 |
11.5. Evacuation |
50 |
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19.3. Print Pattern Indoor Unit Printed Circuit Board |
75 |
11.6. Gas charging |
51 |
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19.4. Print Pattern Indicator & Receiver Printed Circuit Board |
76 |
12 Servicing Information |
52 |
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1Features
•High efficiency.
•Compact design.
•Wider range of horizontal discharge air.
•Air Filter with function to reduce dust and smoke.
•Automatic air swing and manual adjusted by Remote Control for horizontal and vertical airflow.
•Long installation piping up to 82 feet.
•Quality Improvement
−Random auto restart after power failure for safety restart operation.
−Gas leakage detection.
−Prevent Compressor reverse cycle.
−Inner protector to protect Compressor.
−Noise prevention during soft dry operation.
−Blue coated Condenser for high resistance to corrosion.
−Anti-dew formation control (Cooling & Soft Dry).
•Operation Improvement
−Quiet mode to provide quiet operation.
−Powerful mode to reach the desired room temperature quickly.
−24-hour timer setting.
•Serviceability Improvement
−Removable and washable Front Panel.
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
2 Functions
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
3 Product Specifications
3.1.CS-C18DKU CU-C18DKU
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Unit |
CS-C18DKU |
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CU-C18DKU |
Power Source (Phase, Voltage, Cycle) |
, V, Hz |
Single, 208 - 230, 60 |
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Cooling Capacity |
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kW (BTU/h) |
5.20 (17,700) - 5.20 (17,700) |
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Moisture Removal |
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l/h (Pint/h) |
2.1 (4.4) |
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Airflow Method |
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OUTLET |
SIDE VIEW |
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TOP VIEW |
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INTAKE |
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Air Volume |
(Lo) |
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m3/min (cfm) |
11.2 (400) - 11.2 (400) |
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24.1 (850) - 27.3 (960) |
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(Me) |
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m3/min (cfm) |
12.1 (430) - 13.6 (480) |
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— |
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(Hi) |
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m3/min (cfm) |
13.1 (460) - 13.1 (460) |
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37.3 (1,320) - 39.7 (1,400) |
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(SHi) |
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m3/min (cfm) |
13.6 (480) - 13.6 (480) |
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Noise Level |
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dB (A) |
High 42 - 42, Low 37 - 37 |
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High 54 - 56 |
Electrical Data |
Input Power |
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kW |
1.74 - 1.78 |
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Running Current |
A |
8.5 - 7.9 |
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EER |
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W/W (BTU/hW) |
2.99 - 2.92 (10.15 - 9.90) |
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Starting Current |
A |
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47.0 |
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Piping Connection Port |
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inch |
G ; Half Union 1/2” |
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G ; 3-way valve 1/2” |
(Flare piping) |
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inch |
L ; Half Union 1/4” |
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L ; 3-way valve 1/4” |
Pipe Size |
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inch |
G ; (gas side) 1/2” |
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G ; (gas side) 1/2” |
(Flare piping) |
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inch |
L ; (liquid side) 1/4” |
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L ; (liquid side) 1/4” |
Drain |
Inner diameter |
inch (mm) |
6-10/32 (16) |
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Hose |
Length |
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inch (mm) |
25-19/32” (650) |
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Power Cord |
Length |
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m |
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Number of core-wire |
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— |
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— |
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Dimensions |
Height |
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inch (mm) |
10 - 13/16 (275) |
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26 - 17/32 (685) |
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Width |
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inch (mm) |
39 - 9/32 (998) |
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31 - 1/2 (800) |
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Depth |
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inch (mm) |
9 - 1/16 (230) |
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11 - 13/16 (300) |
Net Weight |
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lb (kg) |
24 (11.0) |
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106 (48.0) |
Compressor |
Description |
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Rotary (1 cylinder) |
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rolling piston type |
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Motor |
Type |
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Induction (2-poles) |
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Rated |
Output |
kW |
— |
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1.2 |
Air Circulation |
Description |
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Cross-flow Fan |
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Propeller Fan |
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Material |
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ASHT-18 |
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AES + PC + GF15% |
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Motor |
Type |
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Transistor (8-poles) |
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Induction (6-poles) |
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Input |
W |
40.0 |
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133.3 |
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Rated |
Output |
W |
30 |
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52 |
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Fan Speed |
Low |
rpm |
1,130 - 1,130 |
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590/670 |
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Medium |
rpm |
1,220 - 1,220 |
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— |
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High |
rpm |
1,320 - 1,320 |
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915/975 |
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SuperHigh |
rpm |
1,370 - 1,370 |
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Heat Exchanger |
Description |
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Evaporator |
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Condenser |
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Tube material |
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Copper |
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Copper |
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Fin material |
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Aluminium (Pre Coat) |
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Aluminium (Blue Coat) |
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Fin Type |
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Slit Fin |
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Corrugated Fin |
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Row / Stage |
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(Plate fin configuration, |
forced draft) |
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2 × 15 |
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2 × 31 |
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FPI |
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21 |
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18 |
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Size (W × H × L) |
inch (mm) |
31-28/32 × 12-13/32 × 1 |
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30-1/16 × 25-20/32 ×1 |
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(810 × 315 × 25.4) |
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29-7/32 |
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(762.4 ×651.0 ×25.4) |
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(742.4 |
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU |
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Unit |
CS-C18DKU |
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CU-C18DKU |
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Refrigerant Control Device |
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— |
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Capillary Tube |
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Refrigeration Oil |
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(cm3) |
— |
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SUNISO 4GDID or ATMOS |
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M60 or ATMOS 56m |
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Refrigerant (R-22) |
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g (oz) |
— |
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1,240 (43.8) |
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Thermostat |
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— |
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Mechanical Control |
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Protection Device |
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— |
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Overload Protector |
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Capillary Tube |
Length |
inch (mm) |
— |
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25-19/32 (650) |
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Flow Rate |
l/min |
— |
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20.9 |
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Inner Diameter |
inch (mm) |
— |
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2/32 (1.9) |
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Air Filter |
Material |
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P.P. |
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— |
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Style |
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Honeycomb |
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Capacity Control |
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Capillary |
Tube |
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Compressor Capacitor |
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µF, VAC |
— |
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40 µF, 400VAC |
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Fan Motor Capacitor |
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µF, VAC |
— |
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3.0 µF, 450VAC |
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Note:
• Specifications are subjected to change without prior notice for further improvement.
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
3.2.CS-C24DKU CU-C24DKU
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Unit |
CS-C24DKU |
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CU-C24DKU |
Power Source (Phase, Voltage, Cycle) |
, V, Hz |
Single, 208 - 230, 60 |
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Cooling Capacity |
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kW (BTU/h) |
6.82 (23,200) - 6.82 (23,200) |
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Moisture Removal |
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l/h (Pint/h) |
3.5 (7.4) |
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Airflow Method |
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OUTLET |
SIDE VIEW |
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TOP VIEW |
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INTAKE |
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Air Volume |
(Lo) |
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m3/min (cfm) |
12.3 (430) - 12.3 (430) |
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— |
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(Me) |
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m3/min (cfm) |
13.6 (480) - 13.6 (480) |
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— |
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(Hi) |
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m3/min (cfm) |
14.9 (530) - 14.9 (530) |
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50.5 (1,780) - 54.7 (1,930) |
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(SHi) |
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m3/min (cfm) |
15.4 (540) - 15.4 (540) |
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— |
Noise Level |
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dB (A) |
High 46-46, Low 40-40 |
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High 55 - 57 |
Electrical Data |
Input Power |
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kW |
2.64 - |
2.68 |
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Running Current |
A |
13.1 -12.1 |
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EER |
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W/W (BTU/hW) |
2.58 - 2.54 (8.75 - 8.65) |
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Starting Current |
A |
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63.0 |
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Piping Connection Port |
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inch |
G ; Half Union 5/8” |
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G ; 3-way valve 5/8” |
(Flare piping) |
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inch |
L ; Half Union 1/4” |
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L ; 3-way valve 1/4” |
Pipe Size |
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inch |
G ; (gas side) 5/8” |
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G ; (gas side) 5/8” |
(Flare piping) |
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inch |
L ; (liquid side) 1/4” |
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L ; (liquid side) 1/4” |
Drain |
Inner diameter |
inch (mm) |
6-10/32 (16) |
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— |
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Hose |
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Length |
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inch (mm) |
25-19/32 (650) |
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— |
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Power Cord |
Length |
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m |
— |
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— |
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Number of core-wire |
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— |
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— |
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Dimensions |
Height |
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inch (mm) |
10 - 13/16 (275) |
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29 - 17/32 (750) |
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Width |
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inch (mm) |
39 - 9/32 (998) |
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34 - 7/16 (875) |
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Depth |
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inch (mm) |
9 - 1/16 (230) |
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13 - 19/32 (345) |
Net Weight |
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lb (kg) |
26 (12.0) |
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131 (59.5) |
Compressor |
Description |
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— |
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Rotary (1 cylinder) rolling |
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piston type |
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Motor |
Type |
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— |
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Induction (2-poles) |
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Rated |
Output |
kW |
— |
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1.8 |
Air Circulation |
Description |
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Cross-flow Fan |
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Propeller Fan |
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Material |
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ASHT-18 |
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PP |
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Motor |
Type |
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Transistor (8-poles) |
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Induction (6-poles) |
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Input |
W |
50 |
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170.8 |
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Rated |
Output |
W |
30 |
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77 |
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Fan Speed |
Low |
rpm |
1,220 - 1,220 |
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— |
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Medium |
rpm |
1,350 - 1,350 |
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— |
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High |
rpm |
1,480 - 1,480 |
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840 - 900 |
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SuperHigh |
rpm |
1,530 - 1,530 |
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— |
Heat Exchanger |
Description |
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Evaporator |
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Condenser |
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Tube material |
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Copper |
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Copper |
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Fin material |
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Aluminium (Pre Coat) |
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Aluminium (Blue Coat) |
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Fin Type |
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Slit Fin |
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Corrugated Fin |
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Row / Stage |
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(Plate fin configuration, |
forced draft) |
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2 × 15 |
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2 × 34 |
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FPI |
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21 |
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18 |
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Size (W × H × L) |
mm |
31-28/32 x 12-13/32 x 1 |
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33-15/32 x 28-4/32 x 1 |
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(810 x 315 x 25.4) |
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34-9/32 |
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(850.5 x 714 x 25.4) |
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(870.5 |
Refrigerant Control Device |
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— |
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Capillary Tube |
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Refrigeration Oil |
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(cm3) |
— |
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SUNISO 4GDID or ATMOS |
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M60 |
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU |
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Unit |
CS-C24DKU |
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CU-C24DKU |
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Refrigerant (R-22) |
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g (oz) |
— |
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1,480 (52.2) |
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Thermostat |
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— |
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— |
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Protection Device |
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— |
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Inner Protector |
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Capillary Tube |
Length |
inch (mm) |
— |
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13-12/32 (340.0) |
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Flow Rate |
l/min |
— |
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21.0 |
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Inner Diameter |
inch (mm) |
— |
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3/32 (2.0) |
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Air Filter |
Material |
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P.P. |
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— |
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Style |
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Honeycomb |
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Capacity Control |
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Capillary Tube |
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Compressor Capacitor |
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µF, VAC |
— |
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60 µF, 400/440VAC |
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Fan Motor Capacitor |
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µF, VAC |
— |
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3.5 µF, 440VAC |
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Note:
• Specifications are subjected to change without prior notice for further improvement.
9
CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
4 Dimensions
4.1.Indoor Unit & Remote Control
4.1.1.CS-C18DKU CS-C24DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
4.2.Outdoor Unit
4.2.1.CU-C18DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
4.2.2.CU-C24DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
5 Refrigeration Cycle Diagram
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
6 Block Diagram
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
7 Wiring Diagram
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8 Operation Details
8.1.Cooling Operation
•Cooling operation can be set using remote control.
•This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control.
•The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 60°F to 86°F.
•During cooling operation, the compressor will stop running and restart as shown in below figure.
8.1.1.Cooling Operation Time Diagram
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.2.Soft Dry Operation
•Soft Dry operation can be set using remote control.
•Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.
•This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
•When operation begins, Soft Dry will be switched “ON” for a maximum 10 minutes, then Soft Dry operation will be turned “OFF” for a minimum 6 minutes. After that, the Soft Dry operation will be “ON” and “OFF” based on the setting temperature as shown in below figure.
•However after 3 minutes of compressor off, during Soft Dry “OFF” (within 6 minutes Soft Dry restart control), the indoor unit will start to operate at normal Cooling mode if the intake temperature is higher than Cooling “ON” point.
8.2.1.Soft Dry Operation Time Diagram
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.3.Automatic Operation
•Automatic operation can be set using remote control.
•This operation starts to operate with indoor fan at SLo speed for 20 seconds to judge the intake air temperature.
•After judged the temperature, the operation mode is determined by refering to the below standard.
•Then, the unit start to operate at determined operation mode, until it is switched off using remote control, with the setting temperature as shown in below table.
•The setting temperature for all the operations can be changed one level up or one level down from the standard temperature as shown in below table by pressing on the temperature up or temperature down button at remote control.
•The operation mode judging temperature and standard setting temperature can be increased by 3.6°F permanently, by open the circuit of JX1 at indoor electronic controller.
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.4.Operation Control
(For 8.4.1. to 8.4.6. information applies only to Cooling and Soft Dry Operation)
8.4.1. Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during:- − Cooling operation - the compressor stops for 3 minutes (minimum) before resume operation.
− Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation.
• If the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the moment operation stop, although the unit is turn on again within the period.
• This phenomenon is to balance the pressure inside the refrigerant cycle.
8.4.2. 7 Minutes Time Save Control
•The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls between the compressor ON temperature (A) and compressor OFF temperature (B) during the period.
•This phenomenon is to reduce the built up humidity inside a room.
8.4.3. 60 Seconds Forced Operation
• Once the air conditioner is turned on, the compressor will not stop within 60 seconds in a normal operation although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON operation button at the remote control is permitted.
• The reason for the compressor to force operate at minimum 60 seconds is to allow the refrigerant oil run in a full cycle and return back to the outdoor unit.
8.4.4. Anti-Freezing Control
•If the temperature of the indoor heat exchanger falls below 35.6°F continuously for 4 minutes or more, the compressor turns off. The fan speed setting remains the same.
•This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form returning to the compressor.
•Compressor will restart again when the indoor heat exchanger temperature rises to 50°F (Recovery).
•Restart control (Time Delay Safety Control) will be applied in this Control if the recovery time is too short.
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.4.5.Compressor Reverse Rotation Protection Control
•If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and indoor heat exchanger is 4.5°F or less for continuous 2 minutes, compressor will stop and restart automatically.
•Time Delay Safety Control is activated before the compressor restart.
T = Intake air temperature - Indoor heat exchanger temperature
•This is to prevent compressor from rotate reversely when there is an instantaneous power failure.
8.4.6. Starting Current Control
• When the compressor, outdoor fan motor and indoor fan motor are simultaneously started, the indoor fan motor will start to operate at 1.6 second later.
• The reason of the difference is to reduce the starting current flow.
8.4.7. Anti-Dew Formation Control
•Purpose is to prevent dew formation on indoor unit air discharge area.
•When room temperature is constant (±1.8°F) the following conditions occur for 30 minutes continuously, anti-dew formation will activate:
−Remote Control setting temperature is less than 77°F.
−Compressor is on.
−Cooling operation mode.
−Indoor Fan motor operate at Low fan speed or QLo.
•This control is cancelled immediately when above condition is changed.
•Anti-Dew formation is control by:
1.Increasing Air Flow Volume
a.Lo fan speed
Lo fan speed is changed to Lo+ after 30 min to prevent dew formation.
b.QLo fan speed
Dew formation may occurs at QLo cool, therefore QLo cool is operated only 1 hr 30 min (1 hr QLo, 30 min QLo +100 rpm). After that, it operates at QLo +180rpm (However Quiet LED remains on).
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
2.Norrowing
Vertical Airflow Direction
−During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 10° - 38° to 10° - 27° under Cooling and Soft Dry operation mode.
−During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 10°, 14°, 18°, 22°, 27° to 10°, 13°, 16°, 19°, 22° under Cooling and Soft Dry operation mode.
3.Narrowing
Horizontal Airflow Direction
−During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 0° - 44° to 14° - 30° under Cooling and Soft Dry operation mode.
−During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 0°, 11°, 22°, 33°, 44° to 14°, 18°, 22°, 26°, 30° under Cooling and Soft Dry operation mode.
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CS-C18DKU CU-C18DKU / CS-C24DKU CU-C24DKU
8.5.Indoor Fan Speed Control
• Indoor Fan Speed can be set using remote control.
8.5.1.Fan Speed Rotation Chart
COOL/ DRY |
CS-C24DKU |
CS-C18DKU |
S Hi |
1620 |
1420 |
Hi |
1570 |
1360 |
Me |
1450 |
1250 |
Lo+ |
1360 |
1220 |
Lo |
1260 |
1150 |
Lo- |
1100 |
980 |
S Lo |
860 |
780 |
Q Hi |
1470 |
1260 |
Q Me |
1350 |
1150 |
Q Lo |
1160 |
1050 |
8.5.2.Automatic Fan Speed Control
•When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
−Fan speed rotates in the range of Hi, Me and Lo-.
−Deodorizing Control will be activated.
•Auto Fan Speed during Cooling operation:
1.Indoor fan will rotate alternately between off and on as shown in below diagram.
2.At the beginning of each compressor start operation, indoor fan will increase fan speed gradually for deodorizing purpose.
3.For the first time the compressor operate, indoor fan will be switched to Hi fan speed from Loafter 70 seconds from the start of compressor. This cause the room temperture to achieve the setting temperature quickly.
4.During compressor stop, indoor fan will operate at Lofor the beginning 20 seconds to prevent higher volume of refrigerant in liquid form returning to the compressor.
5.After the compressor at turn off condition for 3 minutes, indoor fan will start to operate at Loto circulate the air in the room. This is to obtain the actual reading of the intake air temperature.
6.For the resume of compressor operation, indoor fan will operate at Me fan speed to provide comfort and lesser noise environment, after 70 seconds from the restart of compressor.
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