Re: VFD electronic problem
That appears to a MOV, Metal Oxide Varistor and is used for absorbing overvoltage or voltage spikes, the problem with them is if the absorb more energy than they are designed for they self destruct.
Hopefully there will be a number on it, otherwise you have to go by the normal or peak operating voltage across it, and the physical size for the energy value.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.