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    Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

    Ah, Thanks for that Larsb! certainly worth trying ... it's the only thing left as since my last post i replaced the 3 phase wires, tried another set of 3 halls sensors, new hall wires, and got the same shuddering issue. Note I went with the ss441A following other threads on here saying they are...
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    What's causing a false throttle voltage? sabvoton 72150

    Hi all, my sabvoton thinks its receiving 2.4v of throttle voltage, even though the actual throttle is delivering a normal 0.8 to 4 volts. Its a brand new 72150 controller and qs203 motor, worked for a day, then threw throttle error 30...or sometimes throws a hall fault...replaced a bunch of old...
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    Sabvoton throttle error (Error No. 30)

    Did you resolve this? I've got a false throttle voltage of 2.4 volts on the sabvoton software, flags a throttle error (same as above) or a hall sensor error. The throttle wire has a real voltage of 0.8 up to 4.1v as you twist the throttle, disconnect it and the sabvoton still thinks there's a 2...
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    Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

    Update, as may help someone someday. I cut all the phase wires and pulled them out of the axle to inspect (my last resort before replacing the motor)- they all had insulation that was cracked and broken and flaking away! Likely why the motor shuddered under load. Will replace and try again.
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    Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

    Update - New Sabvoton 72150 arrived (couldn't get the old one to communicate), I run the hall test, wheel rotates as it should, eventually it stops and fails the test - I've done about 20 tests, twice it's said "test ok", but the hall angle hasn't updated. The first time it started at 66 deg...
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    Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

    Sounds like a lot you've learnt through experience - Thanks Frankie! For $5 will try the usb cable. My sabvoton is old, before the controllers had a usb socket, it just has 2 wires into a plug...hopefully the usb cable has the chip inside it that my old girl needs. I think you are right, I need...
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    Expert diagnosis required - Hall faults on Sabvoton 72150 / Crystalite shuddering

    Patient history: older Sabvoton 72150, Crystalite MKII, 92V, Cycle analyst (10 KW system). It's always had a hall issue where it'd fault if you accelerated hard for more than a few seconds, or if you dumped the throttle off too fast instead of ramping it down gradually. Then few years later, if...
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