Battery Fault (CAN)

What does 55 mean?

The connected battery's BMS is reporting a general internal fault via CAN communication. This indicates that the battery itself has detected an issue and may have entered a protective state, preventing further charging or discharge. The specific nature of the fault usually requires further diagnosis from the battery's own system.

• An unspecified internal fault within the battery pack or its Battery Management System (BMS).
• The battery has entered a protective state due to an internal condition such as over-temperature, over-current, or cell imbalance.
• An error in the battery's internal diagnostics system preventing normal operation.

Click steps to track your progress.

1. 1

   Consult the operating instructions or connect a diagnostic tool for the specific battery model to ascertain the exact nature of the internal fault reported by its BMS.

2. 2

   Perform a diagnostic scan of the battery's BMS, if possible, to retrieve detailed fault codes.

3. 3

   If safe to do so, disconnect and re-connect the battery to the charger to attempt a system reset on the battery's BMS.