Segway-Ninebot · BMS (battery protection)
22 Segway-Ninebot error code 22
BMS password/authentication error
Widely published – may differ by model/firmware
Note
Table published for Xiaomi/Segway-Ninebot scooters; may differ by model/firmware.
Possible causes
General, component-based causes – not a manufacturer-specific statement.
- Cell voltage outside protection limits
- Over-current or short-circuit protection
- Temperature outside the permitted range
- BMS or communication fault
Safe test steps
- Pack temperature (let it rest at room temperature, repeat).
- Manufacturer wake/reset (e.g. connect the original charger) per instructions.
- Cell-group voltages – trained technicians with insulated tools only.
Workshop reference values
- Balanced pack at rest: group spread typically ≤ 30 mV (workshop rule of thumb).
Repair approach
- Remove the cause (temperature, charge), then manufacturer reset.
- BMS replacement/repair only at a battery specialist.
Tools needed
- Digital multimeter (CAT III, fused inputs)
- Manufacturer dealer diagnostic tool/software (if available)
Safety
- Never bypass the BMS or revive deeply discharged cells with a normal charger.
This information does not replace manufacturer service documentation. Work on batteries and high-voltage parts only with the appropriate expertise.
Related fault codes
21Battery (BMS) communication fault23BMS serial number error (default value)10Communication error between dashboard and control board11Abnormal current in motor phase A12Abnormal current in motor phase B13Abnormal current in motor phase C14Throttle fault / not in zero position15Brake lever fault / not in zero position