Grundfos · ALPHA2 Pumps
This indicates an internal electrical problem within the pump's motor or its control system. It signifies a hardware failure or malfunction.
Click steps to track your progress.
Turn off the power to the pump at the main electrical breaker.
Wait for at least 30 seconds, then restore power to attempt a reset of the pump's electronics.
Inspect the pump for any visible signs of damage, burn marks, or moisture around electrical parts.
If the fault persists after resetting, this typically indicates an internal component failure requiring professional service.
Contact a qualified technician or the manufacturer's support.