HBD PV500-0007M1 User Manual page 19

PV500 series solar pumping inverters Installation guidelines
U1 and V1 are the common terminals of the windings. Connect them to the output terminal W
of the solar pumping inverter. Connect U2 to the output terminal U of the inverter. Connect V2
to the output terminal V of the inverter. (Note: Use the screws equipped with the inverter.)
Connect DI4 of the inverter to COM in short circuited manner.
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