1-1 Precautions for the Service ..................................................................................................................................................3

1-2 Precautions related to static electricity and PL ..........................................................................................................3

1-3 Precautions for the Safety ....................................................................................................................................................4

1-4 Precautions for handling a system containing refrigerants .................................................................................5

1-5 Precautions for the brazing .................................................................................................................................................5

1-6 Precautions for charging refrigerants .............................................................................................................................5

2. General Overview ......................................................................................................6

2-1 Features of the System ..........................................................................................................................................................6

2-2 Product Specifications ...........................................................................................................................................................8

2-3 Specifications of optional items.....................................................................................................................................16

3. Disassembly and Reassembly ............................................................................... 18

3-1 Tank Integrated Hydro Unit ..............................................................................................................................................19

3-2 Outdoor Unit...........................................................................................................................................................................24

4. Troubleshooting ..................................................................................................... 74

4-1 Wired remote controller ....................................................................................................................................................74

4-2 Troubleshooting by symptoms ......................................................................................................................................77

4-3 Hydro Unit ...............................................................................................................................................................................78

4-4 Items to check before diagnostics ...............................................................................................................................84

4-5 Troubleshooting by symptoms .....................................................................................................................................85

5. PCB Diagram ......................................................................................................... 100

5-1 Tank Integrated Hydro Unit ........................................................................................................................................... 100

5-2 Outdoor Unit........................................................................................................................................................................ 102