VESC (FSESC dual 4.20) caught fire

Sure, most probably not the battery, just thought you had sourced one from some local builder :smile:

Uggh. The “Plus” version isn’t a dual ESC, it’s a dual ESC plus switch – a switch that folks may not want.

That way, you have 3 things all on the same board, and now if any of those 3 things fail you have to buy all 3, instead of just the one that failed.

Modularity = good

All-in-one = bad

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Yes, but the AS switch can be disabled and you can use roll to start.

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You’re a broken record Brian. People make their own choices and people are choosing to buy these esc’s for convenience. Make a psa post with all of your industry advice in it and get it all off your chest in one massive cumblast.

Give it a rest please.

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He’s just helping brother, it’s all good.

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People on reddit and in an facebook group suggests this is because of a short. Since it has been wired correctly with positive to positive and negative to negative. Could this be a manufacturing defect?

One side seems fine, the other one though. It is MESSED UP

Seriously seriously doubt this kind of carnage is from blown canbus chip. As others have said, contact flipsky, try to get it replaced.

Talked with them. They claimed it is impossible the ESC had a manufacturing error. But offered me 50% discount for a replacement.

Hi David
I 'd like to solve the problem for you.
Our product 100% test before ship it,and i have check it again before package with our company technician,so,i think impossible the product have problem by itself.
Even if not found the problem,i am still like to apply for 50% discount for you buy new replacement,how do you think?

That’s their blanket statement.

I assume yeah. I will order the new one and see how it holds up. If it breaks down again I will make a paypal drawback or something.

Push past the initial offer and get a new one as a replacement.

I keep seeing this 50% discount, they offered me 5% when I killed my 4.20. I’m thinking it was a typo now lol, I told them to shove it :joy:

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Maybe this is how it has to be done, considering in some eastern culture like China, you are almost expected to try to bargain a bit.

There’s no maybe haha. Stand your ground, take your shirt off.

Looks like the fire started in the power stage, any chance you could remove the thermal material to reveal what shape the MOSFETs are in?

If it’s the MOSFETs that burned, my theory is that when the BMS cutout, one or more high side MOSFETs were left floating, and during the turn on sequence (since the switch is lowside) the lowside MOSFETs must’ve been triggered on, resulting in shoot-through and fire.

The original VESC 4 schematic did not call for pulldown resistors on the highside MOSFETs.

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