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Zero Motorcycles Forum | 2013+ / Re: Zero S 2019 - Sevcon CAN Link Down
« on: May 17, 2024, 04:21:56 AM »
First off, are you sure that the link down event correlates to you losing power? It itself isn't an error per se, but it happening when it shouldn't be is of course a fault. However as you've seen from the second set of logs the link going down alone isn't necessarily noticeable. When you do lose power you're also getting a bunch of other errors and they all seem to be related to overvoltage and overcurrent, and the contactor welded error also isn't good (I think someone explained to me before that it doesn't necessarily mean it is physically welded, but there is something preventing it from opening). I also notice that the "B" voltage is 100V which seems reasonable and lines up with the actual pack voltage reading, but the "C" voltage is anywhere from 113V to 138V. I'm not sure what B and C actually refer to but considering the battery only goes up to 116V that does seem a bit iffy.
More info about the error codes here if you want to try and make more sense of it: https://zeromanual.com/wiki/Gen2/Motor_Controller/CAN_Diagnostics
EDIT: Probably should have clarified, does the time stamp when the link goes down and you get all those errors actually line up with the time when you lose power. There could be other causes, when it was happening to me it was due to a faulty throttle and there wasn't anything in the logs that pointed to it.
More info about the error codes here if you want to try and make more sense of it: https://zeromanual.com/wiki/Gen2/Motor_Controller/CAN_Diagnostics
EDIT: Probably should have clarified, does the time stamp when the link goes down and you get all those errors actually line up with the time when you lose power. There could be other causes, when it was happening to me it was due to a faulty throttle and there wasn't anything in the logs that pointed to it.