hope this is the right place for this.
i had purchased a new VFD for my lathe, its a chinese huangyag one, maybe not the best. now at first i had some issues with setting this up (see my other thread 'is my motor toast')

now it was working fine but the other day whilst using the lathe there was a loud bang, a flash from the inverter and all the power in the shop went off.

after turning off the VFD and restoring power i checked the wiring going to and from the inverter for shorts but everything seemed fine.
gingerly i turned on the VFD there was a very quiet pop and it lost its 'magic smoke'

there was no display or anything.
i contacted the seller and they have agreed to replace it which is good.

now my questions are:-
i have read that if they have been stored for a while, VFD's need to be 'conditioned' before use to protect the capacitors? is this true and if so whats the best way to do it?
also when setting up i missed that the base frequency was set to 400hz

( which caused the problems in the other thread) could this have led to the failure (although once setup correctly it did run fine for 45mins of use)?
or was this just a dodgy unit that was going to fail anyway.
just want to make sure that i dont inadvertently do anything to damage the replacement.
thanks in advance for the help guys, you guys
