Hitachi UTOPIA R32 Series Technical Catalogue page 8

General Index
9.4 Refrigerant charge amount.................................................................................................................... 92
9.4.1 Refrigerant charge before shipment (W
9.4.2 Calculation method for the additional refrigerant charge ............................................................................... 92
9.5 Caution in case of refrigerant leakage................................................................................................... 94
9.5.1 Maximum permitted concentration of hydrofluorocarbon (HFC) ................................................................... 94
9.5.2 Calculation of refrigerant concentration ......................................................................................................... 94
9.5.3 Countermeasure for R410A refrigerant leakage ............................................................................................ 95
10. Electrical wiring ....................................................................................................... 97
10.1 General information ............................................................................................................................... 98
10.1.1 Electromagnetic compatibility ...................................................................................................................... 98
10.1.2 Harmonics ................................................................................................................................................... 99
10.2 General verifications.............................................................................................................................. 99
10.3 DIP and RSW switches settings ............................................................................................................ 99
10.3.1 RAS-3HVRC2 .............................................................................................................................................. 99
10.3.2 RAS-(4-6)H(V)(R/N)(P/C)2E ..................................................................................................................... 102
10.4 System wiring diagram ........................................................................................................................ 105
10.4.1 Outdoor and indoor unit electrical wiring ................................................................................................... 105
10.4.2 Wire size .................................................................................................................................................... 106
10.5 H-LINK II system ................................................................................................................................. 107
10.5.1 Features .................................................................................................................................................... 107
10.5.2 Specifications ............................................................................................................................................ 107
10.5.3 DIP Switch setting for 2, 3 and 4 indoor units systems ............................................................................. 108
10.5.4 Examples of the system of connection between H-LINK and H-LINK II units ............................................110
10.5.5 Examples of H-LINK II system ...................................................................................................................111
10.6 System Control - Main concept ........................................................................................................... 113
10.6.1 UTOPIA Prime ............................................................................................................................................113
10.6.2 UTOPIA IVX Prime .....................................................................................................................................114
10.6.3 System control comparison ........................................................................................................................115
11. Troubleshooting ..................................................................................................... 117
11.1 On-screen displays during abnormal operation................................................................................... 118
11.2 Alarm codes ........................................................................................................................................ 120
VI TCGB0136 rev.1 - 05/2021
(kg)) ............................................................................................... 92
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