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TABLE OF CONTENTS
PAGE PAGE
1. Safety Precautions ............................................. 3
2. Precaution for Using R32 Refrigerant .............. 6
3. Specification ..................................................... 10
4. Location of Controls and Components .......... 16
4.1 Indoor Unit .................................................. 16
4.2 Outdoor Unit ............................................... 16
4.3 Remote Control .......................................... 16
5. Dimensions ....................................................... 17
5.1 Indoor Unit .................................................. 17
5.2 Outdoor Unit ............................................... 18
6. Refrigeration Cycle Diagram ........................... 19
6.1 CS-VU9SKQ CU-VU9SKQ
CS-VU12SKQ CU-VU12SKQ ..................... 19
6.2 CS-VU18SKQ CU-VU18SKQ ..................... 20
7. Block Diagram .................................................. 21
7.1 CS-VU9SKQ CU-VU9SKQ
CS-VU12SKQ CU-VU12SKQ ..................... 21
7.2 CS-VU18SKQ CU-VU18SKQ ..................... 22
8. Wiring Connection Diagram ............................ 23
8.1 Indoor Unit .................................................. 23
8.2 Outdoor Unit ............................................... 24
9. Electronic Circuit Diagram .............................. 26
9.1 Indoor Unit .................................................. 26
9.2 Outdoor Unit ............................................... 27
10. Printed Circuit Board ....................................... 29
10.1 Indoor Unit .................................................. 29
10.2 Outdoor Unit ............................................... 32
11. Installation Instruction ..................................... 34
11.1 Select The Best Location ........................... 34
11.2 Indoor Unit .................................................. 35
11.3 Outdoor Unit ............................................... 40
12. Installation and Servicing Air Conditioner
using R32 .......................................................... 44
12.1 About R32 Refrigerant ................................ 44
12.2 Characteristics of R32 Refrigerant ............. 44
12.3 Refrigerant piping installation • Tools used in
services ...................................................... 46
12.4 New installation, Relocation, Repairing of
Refrigerant Cycle System The Procedures 50
12.5 Piping installation of R32 ............................ 51
12.6 Installation, Relocation, and Service .......... 52
12.7 Repairing of refrigerant cycle / Brazing point .
.................................................................... 56
12.8 <Reference> Analysis method for no error
code, no cooling / no warming .................... 62
13. Operation Control ............................................. 64
13.1 Basic Function ............................................ 64
13.2 Indoor Fan Motor Operation ....................... 65
13.3 Outdoor Fan Motor Operation .................... 65
13.4 Airflow Direction .......................................... 66
13.5 Shower / Direct Operation ..........................68
13.6 Timer Control ..............................................69
13.7 Sleep Mode Operation ...............................69
13.8 Random Auto Restart Control ....................70
13.9 Indication Panel ..........................................70
13.10 nanoe-G Operation .....................................70
13.11 In-filter Deactivation Operation ...................73
13.12 Dust Sensor Operation ...............................74
14. Protection Control ............................................75
14.1 Restart Control (Time Delay Safety Control) ..
....................................................................75
14.2 30 Seconds Forced Operation ...................75
14.3 Total Running Current Control ...................75
14.4 IPM (Power Transistor) Prevention Control75
14.5 Compressor Overheating Prevention Control
....................................................................76
14.6 Low Pressure Prevention Control (Gas
Leakage Detection) ....................................76
14.7 Low Frequency Protection Control 1 ..........76
14.8 Low Frequency Protection Control 2 ..........76
14.9 Outdoor Air Temperature Control ...............77
14.10 Cooling Overload Control ...........................77
14.11 Freeze Prevention Control 1 ......................77
14.12 Freeze Prevention Control 2 ......................77
14.13 Dew Prevention Control .............................77
14.14 Odor Cut Control ........................................78
15. Servicing Mode .................................................79
15.1 Auto Off/On Button .....................................79
15.2 Remote Control Button ...............................80
16. Troubleshooting Guide ....................................83
16.1 Refrigeration Cycle System ........................83
16.2 Breakdown Self Diagnosis Function ...........85
16.3 Error Code Table ........................................86
16.4 Troubleshooting Flowchart .........................87
17. Disassembly and Assembly Instructions ... 111
17.1 Indoor Electronic Controllers, Cross Flow
Fan and Indoor Fan Motor Removal
Procedures .............................................. 111
17.2 Outdoor Electronic Controller Removal
Procedure ................................................ 121
18. Technical Data ............................................... 124
18.1 Operation Characteristics ........................ 124
19. Exploded View and Replacement Parts List 130
19.1 Indoor Unit ............................................... 130
19.2 Outdoor Unit ............................................ 133
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