Why is the 'BUS' symbol flashing on my ProMinent Sigma/ 2 Control S2Cb Water Pump?
- BblackrobertSep 23, 2025
If the „BUS“ symbol is flashing on the LCD screen, accompanied by the error message „CANopen pump“ W8-3, it indicates that the HMI was connected to a CANopen pump. Disconnect the HMI from the pump.













