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Magic Pie & Smart Pie Discussions / Re: GM:Edge - what could cause Error 7?
« Last post by Bikemad on May 16, 2024, 11:48:31 PM »According to the information I have, the Error 7 on the BAC-601 display indicates an "over current" fault, but I have no idea as to why this is happening.
Perhaps something is interfering with the MOSFET triggering and causing both the Hi and Low MOSFETs on a single Phase output to be momentarily energised simultaneously causing an excessively high current flow across the controller's shunt and simultaneously shorting together two Phase windings (which might also explain the sudden clunk and braking effect).
It might be worth temporarily separating the brake wires on the two controllers to see if the fault still occurs.
If this cures the problem, you may be able to add a diode to each of the controller's brake wires to prevent the brake signal voltage from being transferred from one controller to the other.
Also, if your mid-drive motor has a sensor on the gear-change to momentarily cut the throttle while changing gears, this could possibly be causing problems with the Edge's controller operation.
Unfortunately, I don't know what else to suggest apart from separating the two systems.
Alan