Re: A real bad day
Looks like the VFD burned up, and took out the wiring to the drives.
Normally VFDs need to be mounted vertically for proper air flow and cooling, but sometimes they just fail anyway.... Catastrophically, as seems to be the case here.
It could be that the breaking transistor in the VFD shorted out and heated up the big resistor and that is what caused the heating of the wiring around it, but I find it odd that there is no discoloration on the resistor that would indicate overheating. Maybe it got hot enough to clean its self?
Jim Dawson
Sandy, Oregon, USA