I myself get the same error code 504 now. After riding around about half a year without problems with the speedbox 3.0 but this week, waiting for the trafficlight, suddenly I see the 504 errorcode on the purion display. I did check everything but still that error code. Switching off and on a...
I'm an rather old guy of 70+ but still going strong if I was still 70. ;-) I ride the Haibike adventr ebike with the speedbox 3.0. But after half a year riding around wit fast pleasure I get an issue with an error code 504. As another guy here on the topic already did have the same issue , just...