So I was headed home from class and it started to downpour. I figured my board would be fine since I conformal coated my FOCBOXes and had a foam neoprene seal around my enclosure. Turns out the neoprene seal around the enclosure didn’t help all that much.
The trip from my apartment to class is about 1 mile. I was probably about 3/4 of the way home when my board began to feel sluggish. I let off the throttle immediately and picked the board up only to be greeted with a small waterfall pouring out of my enclosure. The first thing I did was turn my board off to prevent any further damage. One thing to keep in mind is if your antispark switch is shorted, or if water found its way into the switch on your board, it will not turn off until you disconnect the battery. Fortunately, my antispark switch wasn’t shorted from the water and my board actually turned off.
My board is sitting on my floor in pieces at the moment while I assess the damage. Before powering either VESC, I thoroughly dried them off, then blew them off with canned air. After doing that, I blew air under each direct FET to make sure there wasn’t any water shorting the gate, drain, or source on them. Once I was sure there was no chance of further damage due to water, I tested various resistors connected to the DRV to see if it was blown of if any needed replacing. I then tested each FET for a short. After all that, I hooked them up to my lab power supply and powered them with a max of 12v and just enough amps to get them to turn on. Realistically in this situation, a shorted FET shouldn’t self destruct with somewhere around 6 watts of power going into it.
So far, both FOCBOXes are powering on with my power supply and do not give any odd reading in VESC Tool or throw any faults. I’ll be running them on my test setup shortly to see if they’re both still running at 100%. With any luck I managed to avoid any damage to my electronics.
Hopefully for anyone else that has been caught in this situation will get something out of this and be able to avoid having to send me their VESCs haha
TLDR; Submarined the board, powered it off before anything appears to have been damaged