The Natural Philosopher wrote:

R D S wrote:

Moeller DF4-120

So a 1ph to 3ph VFD?

Most likely thing to go bang is a mains rated capacitor.
Stuff does sometimes just die.

Worth checking motor phase resistances in case there is a short in the
windings tho...

...a picture of the blown board would be handy, too.

Looks like the IGBTs have gone with a vengeance.