Alarm 29 — Forced pumping

What does 29 mean?

Other pumps or external sources are forcing flow through this pump, even when it is stopped and switched off. The pump has stopped due to this alarm. The Grundfos Eye might show a light indicating forced-pumping mode.

• Defective or incorrectly positioned non-return valves in the system.
• Other pumps in the system are generating unwanted flow through this pump.

Click steps to track your progress.

1. 1

   Switch off the pump on the main switch.

2. 2

   Check the system for defective non-return valves and replace the valves if necessary.

3. 3

   Ensure all non-return valves in the system are correctly positioned.

4. 4

   Verify that other pumps in the system are not inadvertently causing flow through the affected pump.