Grizzly 72v PPB - Error Code E12Updated 5 days ago
Error code E12 indicates a dual-battery voltage imbalance, meaning the voltage difference between your two battery packs exceeds the maximum allowed 2.0V threshold.
CRITICAL WARNING: Always power cycle—Dissipate Controller Energy (DCE)—your motorized bike before disconnecting or reconnecting any electrical components. On dual-battery models, both batteries must be removed to perform a proper DCE. Step-by-step guidance is available in our Power Cycle (DCE) Guide.
Troubleshooting Steps for Error E12
- Remove Both Batteries: Turn off the display and safely remove both batteries from the frame. (Note: Controller energy naturally dissipates while both batteries are removed during charging, so a manual DCE button process is not required for this procedure).
- Fully Charge Both Batteries: Charge each battery pack until the charger indicator lights turn solid green (indicating a 100% full charge).
- Perform BMS Balancing: Leave both batteries plugged into their active chargers for an additional 2 hours (do not exceed 2 hours). This allows the internal Battery Management System (BMS) to balance the individual cell groups within each pack.
- Reinstall & Test: Reinstall both fully balanced batteries into their cradles, ensure both power switches are toggled ON, and power on the display to verify that Error E12 clears.
Need Further Assistance?
If error code E12 persists after fully charging and balancing both battery packs, please contact our support team through our Contact Form.
IMPORTANT: Photos and videos are essential for resolving technical support tickets. Please attach clear photos showing both charger indicator lights and your display screen showing Error E12 when submitting your ticket.