This problem maybe coming for n the generator it performs 3 function 1. controls electrical load / resistance to pedals 2. Charging system for the battery 3. Monitors unit when in use (stride) or when it is idle.
To test unit: Remove cover disconnect red battery lead. then use a multi-meter set function to ohms set range that can read 50 ohms. then disconnect generator lead from circuit board. M3=brown , M4= blue, M5= violet, with the meter read between Brown and blue, blue and violet , brown and violet, each of these read should be between 26 and 27 ohms. If any of the reading s are high or low replace generator