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[clay.leihy]

While riding in the last couple of heavy storms, I got an error (flashing red triangle) on my 2015 FX. The error codes on the display were 0020 and 0028. From what I could find online, it sounds like some kind of high voltage short. Dangerous? The whole time it ran just fine and cleared by the time I got home, then charged and ran fine after that. So, could anyone give some advice on whether this is something to worry about and should I maybe add some additional waterproofing somewhere? (Don't ride in the rain? That's ridiculous!)

[Ser15]

20 ZERO_MBB_ERROR_BMS_LOW_ISOLATION
28 ZERO_MBB_ERROR_BMS_ISOLATION_FAULT

Enviado desde mi 6045B mediante Tapatalk

[Justin Andrews]

It's not a short as such, just a tiny high resistance voltage leak caused by the damp.

All my Zeros from my 2012 ZF9 through to to my 2015 SR have done it, with no notable harm.
I generally ignore it, and I ride everyday, all year round in the UK...

Also, and don't quote me on this, but I think the isolation is referring to a leakage to the frame in the bikes 12v system, not its 110v system.

[BrianTRice@gmail.com]

Sometimes water gets behind the accessory charging port rubber boot (when loose) into the signal pins, causing this for me. But I have a DSR, not an FX. In any case, a little electrical insulating grease is worth applying to exposed connections.

The relevant section of the unofficial manual could use improvement:
http://zeromanual.com/index.php/Common_Problems#Loss_of_Power

[MrDude_1]

The first thing to come to mind was that theres some place you need dielectric grease to stop this... but I cant remember where. lol
(so this is a useless post)

[clay.leihy]

It's not a short as such, just a tiny high resistance voltage leak caused by the damp.

All my Zeros from my 2012 ZF9 through to to my 2015 SR have done it, with no notable harm.
I generally ignore it, and I ride everyday, all year round in the UK...

Also, and don't quote me on this, but I think the isolation is referring to a leakage to the frame in the bikes 12v system, not its 110v system.

I really like your advice on this! [emoji28]

Sent from my Z981 using Tapatalk

[BrianTRice@gmail.com]

The first thing to come to mind was that theres some place you need dielectric grease to stop this... but I cant remember where. lol
(so this is a useless post)

That's fine. I'm trying to figure out what to recommend in the manual and all the experts think it's obvious but don't realize the average person needs a very specific list to follow and check.

[Justin Andrews]

The first thing to come to mind was that theres some place you need dielectric grease to stop this... but I cant remember where. lol
(so this is a useless post)

Was it the aux charging port (anderson connector)?

[MrDude_1]

The first thing to come to mind was that theres some place you need dielectric grease to stop this... but I cant remember where. lol
(so this is a useless post)

Was it the aux charging port (anderson connector)?

That would be one of them.
Off the top of my head I remember the charge port, the dash connector, the buttons behind the plugs in the battery module, the throttle and brake switch connectors and that plug for the DC-DC...   but I know thats not the full list.

[Justin Andrews]

Water spray off the Rear tyre was a serious culprit on my 2013, when I filled in the space in the tail with a sheet of plastic, I seriously cut down the time it took for the isolation error to occur on that bike. However on my 2015 it made no difference.

So I wonder on the older bikes if the sevcon getting damp also was/is an issue.

[BrianTRice@gmail.com]

Water spray off the Rear tyre was a serious culprit on my 2013, when I filled in the space in the tail with a sheet of plastic, I seriously cut down the time it took for the isolation error to occur on that bike. However on my 2015 it made no difference.

So I wonder on the older bikes if the sevcon getting damp also was/is an issue.

I have heard (with specific numbers) that the threshold for declaring a short to ground became less sensitive to moisture from 2013 to the 2014+ models. I haven't verified that or or determined what might have precipitated it, but clearly some engineer thought about it.