Wilo · VeroLine and VeroTwin Pumps
This is a warning that the flow of fluid is actually turning the pump impeller, causing it to act like a generator and feed power back into the mains. Prolonged operation in this state can damage the electronic module.
Click steps to track your progress.
Check the system's operating settings.
Ensure the pump is installed correctly and fluid is flowing in the intended direction.
Verify system pressures are within the normal operating range.
Contact customer service if the cause is unclear.