Firstly, take down the No.1 aluminum box, find motor position line and measurethe voltage to see whether there is about 18 v DC by a multimeter.
If there is no 18 v voltage, open the machine frame that is on the right of the emergentstop button
Find out the main board of multihead weigher, there is a P07 plug on the top left-hand corner of the main board, unplug the P07 plug, then measure its voltage by a multimeter. Thenormal voltage is about 18 v DC.
If there is not 18 v DC for P07, then unplug the P05 plug, measure its voltage.
If the two lines have 18v voltage, plug back ; measuring P07 again, if it still do not have voltage that means the main board is fault, need to replace a newmain board.
If the two lines do not have voltage, check whether the DC1 power switch is normal.