Alarm 51 — Pump is blocked

What does 51 mean?

The pump's internal components are blocked, preventing the pump from rotating. This alarm has caused the pump to stop.

• Foreign matter or impurities have entered the pump, obstructing its rotation.
• Sediment buildup or debris preventing the impeller from moving freely.

Click steps to track your progress.

1. 1

   Switch off the main power supply to the pump and lock the switch in position 0.

2. 2

   Close isolating valves on both sides of the pump and drain the system to safely dismantle the pump.

3. 3

   Carefully dismantle the pump and remove any foreign matter or impurities that are blocking the rotation.

4. 4

   Reassemble the pump, open isolation valves, repressurize the system, and restart the pump.