What does Err 21 mean on Sicam SBM 155 Wheel Balancers?
- DDarren BowersSep 3, 2025
If your Sicam Wheel Balancer displays Err 21, the electronic card has detected a dangerous condition related to a high wheel speed during an inactive phase. Switch off the machine, lower the guard, and switch it back on without moving the wheel. If the error persists, check and replace the electric or electronic part, such as the control panel or encoder card, if necessary.




