I own a Carrera Vulcan emtb which I have heavily modified, I am being plagued by cutouts. I run a pswpower 48v 13ah battery. My old controller, a brainpower one from eBay would do this at random, it would make a sort of car ignition noise and freeze up when trying to get going, it would show an error then go away on its own and not reappear for weeks.
Now I've changed to a KT 6 MOSFET 500w controller I have a similar issue, but it's more reproducible. Reducing the current seems to almost eliminate it but not entirely. The error goes as follows:
Switch on bike
Pull throttle or pedal on assist 5
Motor cuts out within moments of trying to start
If throttle held in will display error code 6 which means a short circuit
I have removed connectors, replaced phase and battery wires with thicker ones and soldered them direct. Checked all connections inside the battery. One thing I haven't opened yet is the hub itself. The error is predictable, if I put setting C5 current to more than 6 it will start happening, below this current seems alright (16amps). One other thing is if I ease it in and use the bike for a bit things seem to stabilize as it "warms up" and it will happen less. Pswpower claim their battery is 25amps continuous so it should do it, the problems with both controllers did start when I changed to this battery though.
That is everything, hope somebody can help. I have a multimeter here if that's needed, hopefully there's enough clues here to narrow it down a bit. Cheers!
Now I've changed to a KT 6 MOSFET 500w controller I have a similar issue, but it's more reproducible. Reducing the current seems to almost eliminate it but not entirely. The error goes as follows:
Switch on bike
Pull throttle or pedal on assist 5
Motor cuts out within moments of trying to start
If throttle held in will display error code 6 which means a short circuit
I have removed connectors, replaced phase and battery wires with thicker ones and soldered them direct. Checked all connections inside the battery. One thing I haven't opened yet is the hub itself. The error is predictable, if I put setting C5 current to more than 6 it will start happening, below this current seems alright (16amps). One other thing is if I ease it in and use the bike for a bit things seem to stabilize as it "warms up" and it will happen less. Pswpower claim their battery is 25amps continuous so it should do it, the problems with both controllers did start when I changed to this battery though.
That is everything, hope somebody can help. I have a multimeter here if that's needed, hopefully there's enough clues here to narrow it down a bit. Cheers!