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CONTENTS

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

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

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

2. Function..................................................................................................................................................6

3. Dimension...............................................................................................................................................9

3.1 Indoor Units...................................................................................................................................9

3.2 Outdoor Units..............................................................................................................................11

4. Refrigerant Cycle Diagram...................................................................................................................12

5. Wiring Diagram.....................................................................................................................................13

5.1 Indoor Units.................................................................................................................................13

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 Air purging with vacuum pump....................................................................................................18

6.5 Pumping down (Re-installation)..................................................................................................19

6.6 Re-air purging (Re-installation)...................................................................................................20

6.7 Balance refrigerant of the 2-way, 3-way valves..........................................................................21

6.8 Evacuation...................................................................................................................................22

6.9 Gas charging...............................................................................................................................23

7. Operation characteristics....................................................................................................................24

8. Electronic function...............................................................................................................................25

8.1 Abbreviation.................................................................................................................................25

8.2 Display function...........................................................................................................................25

8.3 Main Protection...........................................................................................................................26

9. Troubleshooting...................................................................................................................................36