E-B90 Code
Check R&A Cycles E-B90 e-Bike Error Code :
Indication conditions
There are no units which may be faulty.
Solution
If there is a problem (the battery on the bicycle is quickly consumed, etc.), perform a battery consumption check.
If [Normal] is displayed after all the connections of the individual parts related to the unit are checked, there may be a fault in the battery, cable, junction [B], etc.
In this case, please contact the place of purchase or a distributor.