Hitachi RAC-18WPB - Power Circuit (Low Voltage) - Model RAC-50 WPB

2. Power circuit (Low voltage)
Fig. 2-1
The 230V AC voltage is rectified to DC voltage (B-12V,16V,12V,5V) pass through switching control IC (ICI), switching
transformer.
(1) B-12V Power supply for electrical expansion valve.
(2) 16V Power supply for IPM driver circuit of compressor and fan motor, IGBT action.
(3) 12V Power supply for 4 way valve relay, power relay, inrush current relay,motor current amplification,
(4) 5V Power supply for microcomputer, peripheral circuits.
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