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CONTENTS
1. Precaution .................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning ......................................................................................................................................... 1
2. Function ........................................................................................................................................................ 6
3. Dimension .................................................................................................................................................... 8
3.1 Indoor Units ................................................................................................................................... 8
3.2 Outdoor Units .............................................................................................................................. 10
4. Refrigerant Cycle Diagram ........................................................................................................................ 11
5. Wiring Diagram .......................................................................................................................................... 12
5.1 Indoor Units ................................................................................................................................. 12
5.2 Outdoor Units .............................................................................................................................. 14
6. Installation details ...................................................................................................................................... 16
6.1 Wrench torque sheet for installation ........................................................................................... 16
6.2 Connecting the cables ................................................................................................................ 16
6.3 Pipe length and the elevation ..................................................................................................... 17
6.4 Installation for the first time ......................................................................................................... 18
6.5 Adding the refrigerant after running the system for many years ................................................ 21
6.6 Re-installation while the indoor unit need to be repaired ........................................................... 22
6.7 Re-installation while the outdoor unit need to be repaired ......................................................... 24
7. Operation characteristics ......................................................................................................................... 27
8. Electronic function .................................................................................................................................... 28
8.1 Abbreviation ................................................................................................................................ 28
8.2 Display function ........................................................................................................................... 28
8.3 Main Protection ........................................................................................................................... 29
8.4 Operation Modes and Functions ................................................................................................. 29
9. Troubleshooting ......................................................................................................................................... 38
9.1 Indoor unit error display .............................................................................................................. 38
9.2 Diagnosis and Solution ............................................................................................................... 39