Hitachi RAW-35RHC, Service Manual

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General Index
SMGB0135 rev.0 - 03/2020 IV
3.5 Anti Legionella function .........................................................................................................................21
3.6 Boost function........................................................................................................................................22
3.7 Emergency function ...............................................................................................................................23
3.8 Night Shift Function ...............................................................................................................................24
3.9 Circuit Pump - DHW Recirculation function...........................................................................................25
3.10 Timers function ......................................................................................................................................26
3.10.1 Setting of Simple timer ................................................................................................................................ 26
3.10.2 Setting of Schedule timer ............................................................................................................................ 26
3.11 Central Operation functions...................................................................................................................27
3.12 Smart function .......................................................................................................................................28
3.12.1 SG Ready Function ..................................................................................................................................... 29
3.13 Energy configuration function ................................................................................................................30
3.14 Pump down procedure function .............................................................................................................31
3.15 Quick action function .............................................................................................................................32
3.16 Inputs and outputs .................................................................................................................................32
3.16.1 Inputs ........................................................................................................................................................... 32
3.16.2 Outputs ........................................................................................................................................................ 32
3.17 Operation information ............................................................................................................................33
3.18 Controller Settings .................................................................................................................................33
3.19 About ....................................................................................................................................................34
4. Electrical checks of main parts .............................................................................. 35
4.1 Outdoor unit...........................................................................................................................................36
4.1.1 Power circuit .................................................................................................................................................. 36
4.1.2 Power circuit (low voltage) ............................................................................................................................ 38
4.1.3 PCB for power circuit ..................................................................................................................................... 39
4.1.4 Reversing valve control circuit ....................................................................................................................... 39
4.1.5 Temperature detection circuit ........................................................................................................................ 40
4.1.6 Electric expansion valve circuit ..................................................................................................................... 41
4.1.7 DC fan motor control circuit ........................................................................................................................... 42
4.1.8 Fan motor ..................................................................................................................................................... 43
4.1.9 Reactor .......................................................................................................................................................... 43
4.1.10 Compressor motor ....................................................................................................................................... 44
4.1.11 Thermistor for outside air temperature (Ta) ................................................................................................. 45
4.1.12 Thermistor for overheat temperature (Td) ................................................................................................... 46
4.1.13 Thermistor for defrost (HEX) temperature (Te) ............................................................................................ 47
4.2 Indoor unit .............................................................................................................................................48