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TABLE OF CONTENTS
1. Safety Precautions.............................................3
2. Specification .......................................................5
3. Location of Controls and Components............9
3.1 Indoor Unit....................................................9
3.2 Outdoor Unit .................................................9
3.3 Remote Control ............................................9
4. Dimensions .......................................................10
4.1 Indoor Unit..................................................10
4.2 Outdoor Unit ...............................................12
5. Refrigeration Cycle Diagram...........................13
5.1 CS-S9NKUW-1 CU-S9NKU-1
CS-S12NKUW-1 CU-S12NKU-1................13
5.2 CS-S18NKU-1 CU-S18NKU-1
CS-S22NKU-1 CU-S22NKU-1 ...................14
6. Block Diagram ..................................................15
6.1 CS-S9NKUW-1 CU-S9NKU-1
CS-S12NKUW-1 CU-S12NKU-1................15
6.2 CS-S18NKU-1 CU-S18NKU-1
CS-S22NKU-1 CU-S22NKU-1 ...................16
7. Wiring Connection Diagram............................17
7.1 Indoor Unit..................................................17
7.2 Outdoor Unit ...............................................19
8. Electronic Circuit Diagram ..............................22
8.1 Indoor Unit..................................................22
8.2 Outdoor Unit ...............................................24
9. Printed Circuit Board .......................................27
9.1 Indoor Unit..................................................27
9.2 Outdoor Unit ...............................................29
10. Installation Instruction.....................................31
10.1 S9NKUW-1 S12NKUW-1 ..........................31
10.2 S18NKU-1 S22NKU-1...............................39
11. Operation Control.............................................47
11.1 Basic Function............................................47
11.2 Indoor Fan Motor Operation.......................48
11.3 Outdoor Fan Motor Operation
(For S9NK and S12NK)..............................48
11.4 Outdoor Fan Motor Operation
(For S18NK and S22NK)............................48
11.5 Airflow Direction..........................................48
11.6 Quiet Operation (Cooling Mode/Cooling Area
of Dry Mode)...............................................49
11.7 Powerful Mode Operation...........................50
11.8 Timer Control..............................................50
11.9 Random Auto Restart Control ....................50
11.10 Indication Panel..........................................51
12. Protection Control............................................52
12.1 Restart Control (Time Delay Safety Control)..
....................................................................52
12.2 30 Seconds Forced Operation ...................52
12.3 Total Running Current Control ...................52
12.4 IPM (Power Transistor) Prevention Control52
12.5 Compressor Overheating Prevention Control
(For S18, S22NK only) .............................. 53
12.6 Low Pressure Protection Control (Gas
Leakage Detection) ................................... 53
12.7 Low Frequency Protection Control 1......... 53
12.8 Low Frequency Protection Control 2......... 53
12.9 Outdoor Air Temperature Control.............. 54
12.10 Cooling Overload Control.......................... 54
12.11 Freeze Prevention Control ........................ 54
12.12 Freeze Prevention Control 2 ..................... 54
12.13 Dew Prevention Control ............................ 54
13. Servicing Mode................................................ 55
13.1 Auto Off/On Button .................................... 55
13.2 Remote Control Button.............................. 56
14. Troubleshooting Guide................................... 57
14.1 Refrigeration Cycle System....................... 57
14.2 Breakdown Self Diagnosis Function.......... 59
14.3 Error Code Table....................................... 60
14.4 Troubleshooting Flowchart........................ 61
15. Disassembly and Assembly Instructions ..... 84
15.1 Indoor Electronic Controllers, Cross Flow
Fan and Indoor Fan Motor Removal
Procedures ................................................ 84
16. Technical Data ................................................. 88
16.1 Operation Characteristics.......................... 88
17. Exploded View and Replacement Parts List. 96
17.1 Indoor Unit................................................. 96
17.2 Outdoor Unit ............................................ 100