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CONTENTS

1. Precaution .................................................................................................................................................... 1

1.1 Safety Precaution .......................................................................................................................... 1

1.2 Warning ......................................................................................................................................... 1

2. Function ........................................................................................................................................................ 5

3. Dimension .................................................................................................................................................... 6

3.1 Indoor Units ................................................................................................................................... 6

3.2 Outdoor Units ................................................................................................................................ 8

4. Refrigerant Cycle Diagram ......................................................................................................................... 9

5. Installation details ..................................................................................................................................... 10

5.1 Wrench torque sheet for installation ........................................................................................... 10

5.2 Connecting the cables ................................................................................................................ 10

5.3 Pipe length and the elevation ...................................................................................................... 11

5.4 Installation for the first time ......................................................................................................... 12

5.5 Adding the refrigerant after running the system for many years ................................................ 16

5.6 Re-installation while the indoor unit need to be repaired ........................................................... 17

5.7 Re-installation while the outdoor unit need to be repaired ......................................................... 19

6. Operation characteristics ......................................................................................................................... 22

7. Electronic function .................................................................................................................................... 23

7.1 Abbreviation ................................................................................................................................ 23

7.2 Display function ........................................................................................................................... 23

7.3 Main Protection ........................................................................................................................... 24

7.4 Operation Modes and Functions ................................................................................................. 25

8. Troubleshooting ......................................................................................................................................... 30

8.1 Indoor unit error display .............................................................................................................. 30

8.2 Diagnosis and Solution ............................................................................................................... 31