9.1.Open input rectifier switch(Up).
9.2.Open bypass switch(UP)
9.3. After battery low voltage indicator crust out, then open battery switch. When UPS is no any alarm statue indicator, bypass will turn to inverter statue.
Notice:it will display alarming information about the wrong phase sequence if rectifier switch is not cut off, at this time, please press F1 and silence, carry out UPS start up process.