8.12. Timer Control  29
 8.13. Random Auto Restart Control 
29
 8.14. Remote Control Signal Receiving Sound 
29
 9 Operating Instructions 
30
 10 Installation Instructions 
36
 10.1. Safety Precautions 
36
 10.2. Attached accessories 
38
 10.3. Select the best location 
38
 10.4. Indoor/Outdoor Unit Installation Diagram 
38
 10.5. Indoor unit 
39
 10.6. Outdoor unit 
43
 11 3-way Valve 
47
 11.1. Air purging 
48
 11.2. Pumping down 
49
 11.3. Evacuation 
52
 11.4. Gas charging 
53
 12 Servicing Information 
54
 12.1. Distinction of Lead Free (PbF) Printed Circuit Board 
54
 12.2. Indoor Electronic Controllers Removal Procedures 
54
 12.3. Indoor Fan Motor and Cross Flow Fan Removal
Procedures 
55
 12.4. Auto OFF/ON Button 
56
 12.5. Remote Control Reset 
57
 13 Troubleshooting Guide 
58
 • High Efficiency
 • Compact Design
 • Comfort Environment
 − Ionizer control for generating negative ion in discharge
air
 − Air filter with function to reduce dust and smoke
 − Wider range of horizontal discharge air
 • Auto Restart
 − Random auto restart after power failure for safety restart
operation
 • Removable and Washable Front Panel
 • Remote Control Illuminable Button
 • Catechin Air Purifying Filter
 − Trap dust, tobacco smoke and tiny particles
 − Prevent the growth of bacteria and viruses trapped
 • Triple Deodorizing Filter
 − Absorb odours produced by wall paper, construction
material and living environment
 13.1. Refrigeration cycle system  58
 13.2. Relationship between the condition of the air conditioner
and pressure and electric current 
59
 13.3. Diagnosis methods of a malfunction of a compressor 
59
 14 Technical Data 
60
 14.1. Thermostat characteristics 
60
 14.2. Operation characteristics 
60
 15 Exploded View (Indoor Unit) 
62
 16 Replacement Parts List (Indoor Unit) 
63
 16.1. CS-C9DKZW 
63
 17 Exploded View (Outdoor Unit) 
64
 17.1. CU-2C18DKH 
64
 18 Replacement Parts List (Outdoor Unit) 
65
 18.1. CU-2C18DKH 
65
 19 Exploded View (Outdoor Unit) 
66
 19.1. CU-3C20DKH 
66
 20 Replacement Parts List (Outdoor Unit) 
67
 20.1. CU-3C20DKH 
67
 21 Electronic Circuit Diagram 
68
 21.1. Remote Control 
76
 21.2. Print Pattern Indoor Unit Printed Circuit Board 
77
 21.3. Print Pattern Indicator Printed Circuit Board 
79
 21.4. Print Pattern Outdoor Unit Printed Circuit Board 
80
 • Quality Improvement
 − Gas leakage protection
 − Prevent compressor reverse cycle
 − 2-stage OLP to protect compressor
 − Noise prevention during soft dry operation.
 − Blue Coated Condenser
 − High resistance to corrosion.
 • Operation Improvement
 − Quiet mode to provide extra quiet operation
 − Powerful mode to reach the desired room temperature
quickly
 • Long Installation Piping
 − Long piping up to 15 meter
 • 12-hour Timer Setting
1 Features
2
CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH