Red LED lit — Pump alarm, pump has stopped operating

What does Red LED mean?

When the warning and alarm symbol on the operating panel turns red, the pump has encountered a critical alarm and stops operating completely. All mode, speed, and unit LEDs are switched off. Immediate action is required to resolve the issue.

• Critical fault preventing safe or proper operation
• Severe internal pump malfunction
• Major power supply issue

Click steps to track your progress.

1. 1

   Immediately switch off the power supply to the pump.

2. 2

   Connect to the Grundfos GO app to retrieve the detailed error description, even though the pump has stopped.

3. 3

   If the operating panel is in power saving mode, press the Selection button to reveal the error code.

4. 4

   Do not attempt to restart the pump until the underlying issue has been identified and resolved.