Error Code: E-09 – Controller Failure

① Problem Description: Ineffective acceleration.

② Step-by-Step Solution: First, please check whether the controller connection is firm, whether the pin inside the connector is deformed, whether the connector is aligned with the arrow, and whether there is a broken line or short circuit. If you find any connection problems, please try reconnection or replace the damaged wire. If no problems are found, then the controller needs to be replaced.

③ Apply to E-bike Models: EC1, EC1-ST.