Product specifications

Contents
1. Precautions ..............................................................................................................................................3
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
2-1-1 Key features of the EHS(SPLIT) .........................................................................................................................7
2-2 Product Specifications ...................................................................................................................................................8
2-2-1 Outdoor Unit ............................................................................................................................................................8
2-3 Specifications of optional items .............................................................................................................................11
2-3-1 Accessories .............................................................................................................................................................11
3. Disassembly and Reassembly ......................................................................................................................... 12
3-1 Hydro unit .........................................................................................................................................................................13
3-2 Outdoor Unit ...................................................................................................................................................................21
4. Troubleshooting............................................................................................................................................................. 37
4-1 Wired remote controller .............................................................................................................................................37
4-2 Troubleshooting by symptoms ..............................................................................................................................40
4-2-1 Communication error after finishing Tracking ......................................................................................40
4-2-2 EEPROM circuit failure .......................................................................................................................................41
4-3 Hydro unit(Mono) ........................................................................................................................................................42
4-3-1 EEPROM error .....................................................................................................................................................42
4-3-2 :
Error due to abnormal data of Wired remote controller thermistor value ............................43
4-3-3 : Error due to abnormal data of Water outlet thermistor value ...............................44
4-3-4
: Error due to abnormal data of DHW tank thermistor value ...................................45
4-3-5 Water pump & flow switch OFF ...................................................................................................................46
4-3-6 Water pump & flow switch ON ....................................................................................................................47
4-3-7 Hydro unit temperature sensor(open/short) ........................................................................................48
4-3-8 Communication error after finishing Tracking(Hydro unit) ............................................................49
4-4 Items to check before diagnostics .......................................................................................................................50
4-4-1 Test run mode and view mode ....................................................................................................................50
4-4-2 Troubleshooting for outdoor unit ..............................................................................................................51
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