E1 / Code 51 — Blocked motor

What does 51 mean?

The warning and alarm symbol flashes red, the display shows error code E1, and the pump stops. This indicates that the pump's motor is blocked.

• The pump is blocked due to deposits.

Click steps to track your progress.

1. 1

   Contact a qualified specialist for assistance with a blocked pump.

2. 2

   Ensure the pump's power supply is isolated before any physical inspection or work.

3. 3

   A specialist will need to remove the pump head and clear any deposits causing the blockage.

4. 4

   Reset the alarm via Grundfos GO after the pump has been unblocked.