Input Fuse break DC/AC inverter ACS800
Our factory got a seriously problem regarding DC/AC inverter ACS800-104-0260-7.
Two input fuses DC of DC/AC inverter suddenly breaked while motor stoped already. Means inverter was not working at that time. Afterthat, we unbox inverter to take a look and measure on mainbroad. As result, two things was discovered. ( attached picture
+ Power main have no output signal
+ Control main have no signal on optical port.
However I dont know why this problem happen while inveter stopped.
Please help me define this reason.