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Latest WARNING: Inmotion V12 (HS and maybe HT, HS even with replacement boards) has a failing board problem (which would mean an instant crash when riding)! Be aware.


meepmeepmayer

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  • meepmeepmayer changed the title to Latest WARNING: Inmotion V12 may have weak boards prone to sudden failure (which would mean an instant crash)! Be aware.
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  • 1 month later...

Still nothing new...

Quote by @Chriull:

Quote

afaik there is nothing official by now, just mentioning of announcements of some resellers that they will replace the board with some new version in april or may...

Edited by meepmeepmayer
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  • 3 weeks later...

It appears Inmotion will produce a new V12 board (likely with bigger TO-247 sized MOSFETs) that will replace the old, weak board. Dealers will usually contact their customers for a (free) board replacement, but there is no official recall. These boards may take some time be to produced and distributed, so maybe a month or two from now.

Make sure to have a new board in any future V12 you buy.

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  • 1 month later...
  • meepmeepmayer changed the title to Latest WARNING: Inmotion V12 HS first production run may have weak boards prone to sudden failure (which would mean an instant crash)! Be aware.
  • 4 weeks later...

(From the V12 cutout tracking topic)

11 hours ago, rolis said:

Its probably time to put this out.

Do not ride your V12 with a new board. There seems to be an issue with the new boards. There will be more information soon and your distributors will get to you too.

10 hours ago, supercurio said:

Yes confirming what @rolis says right here.

As observed by multiple distributors worldwide, some of the replacement boards fail either by burning MOSFET or temporarily which leads to cutout. So far, each instance happened at low, walking speeds.

Inmotion is aware of the issue and working on a lead they identified but it is too early to confirm.

If you have such wheel and want to do something instead of simply waiting, a valid test so far has been to walk the wheel. Like @rolis documented, the failure doesn't necessarily happen quickly, therefore although it permits to recreate the issues sometimes it is not conclusive. Walking x km successfully with the wheel doesn't mean it passed and is safe to ride.

Please inform your distributor in case they are not aware. They should get in touch with Inmotion for further instructions. Inmotion hasn't been keeping distributors in the loop yet.

Message to distributors: I would recommend you wait before shipping wheels to customers after a board swap. If you really don't want to then walk the wheel for some time as the absolute bare minimum test, and inform customers of the ongoing issue and risk. Just like earlier, shipping wheels to customers puts them at risk of cutout, and the reseller to further shipping costs.

A very rough failure rate estimate averaging from the distributors I talked to is 10%:
Edit: talked to more distributors: should be less than 10%. Can't tell if widespread yet (possibly not)

Things are not looking good right now. A notable number of replacement boards are failing, too. The safety of the V12 HT board is also in question after some incidents (maybe this is already fixed with the latest firmware, I don't know). Be careful and stay informed.

Edited by meepmeepmayer
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  • meepmeepmayer changed the title to Latest WARNING: Inmotion V12 (HS and maybe HT, HS even with replacement boards) has a failing board problem (which would mean an instant crash when riding)! Be aware.
  • 4 weeks later...
  • 2 weeks later...

Nothing new, nothing confirmed. I think this is the best advice:

Get the latest version of the V12 board, if you haven't already. For the HS, this means not the original or the replacement board, but the "new" board which seems similar to that of the V12 HT.

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Great quote (about the V12 HS) from the cutout tracking thread. I would say this is the order of the day:

29 minutes ago, Cress said:

Thank you @vBlitz for posting about the crash.  It's a great advertisement for safety gear.  We need to spread the word that no amount of testing insures the original motor-controller is safe. There isn't a guarantee that the motor-controller caused this failure but the original board is ABSOLUTELY GUARANTEED to have a short service life.  Nobody needs extra opportunity to test safety gear, we're supporting that industry already.  :D

Edited by meepmeepmayer
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  • 2 weeks later...
  • 2 weeks later...

General opinion seems to tend towards the V12 being good now. Make sure you have the latest firmware.

If you have a V12 HS, make sure it has the replacement board (ones with the original board should never be ridden!) and that the replacement board has been properly installed and is undamaged from transport and free of production issues. For new orders, it can't hurt to have your seller confirm that they sell you a V12 HS in this latest state (with replacement board), but this should happen automatically.

For the V12 HT, just update to the latest firmware and enjoy.

With no issues, the V12 is a great wheel.

Edited by meepmeepmayer
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