PWM feedback signal at 90% — Possible blocked rotor

What does PWM 90% feedback mean?

The pump's PWM feedback signal, which provides real-time operating status, indicates a 90% duty cycle. This specific feedback usually triggers a warning, suggesting that the pump's rotor might be blocked or obstructed.

• Debris or sediment obstructing the pump's rotor
• Mechanical obstruction within the pump chamber
• Reduced flow due to a blockage in the system

Click steps to track your progress.

1. 1

   Switch off the power supply to the pump and close the isolating valves on both sides of the pump.

2. 2

   Allow the pump housing to cool down completely if the Pumpd liquid was hot.

3. 3

   Refer to the Grundfos GO app for specific troubleshooting guidance related to a blocked rotor.

4. 4

   Consult a qualified technician for inspection and potential cleaning or repair of the pump.