before turn on the power , user need to confirm some points as below :
first , check the voltage of power supply , if over-voltage ,driver will be possibly broken .
second , control signal wire need to be connected firmly .
third , don't need to connect all wires at the firm time , just need to connect the basic system . when work well , then connect one by one .
forth , know the grounding connection clearly .
澳客体彩票app官网下载fifth , observe the working condition carefully in the previous half an hour .