Pump head not enough for pressure loss

Owned by Dennis De Beuckeleer
Nov 25, 2022
1 min read

The error message:

This error can show up when setting a pump head (or pump curve) during the ‘optimise system components’-calculation step.

Meaning:

The set pump head is not enough to supply the loop with the necessary pressure, and therefore, the system will be having an unbalanced underflow.

How to solve this error:

Check the different possibilities for this error:

  1. Is the pump head/pump curve locked correctly?

    1. If not, change these to the correct value

    2. Or let Hysopt calculate the needed pump head by unlocking the value

  2. Are all the pressure drops in the system filled in correctly? You can easily check this by clicking on the pump and using ‘Ctrl+e’. This will show the path of most resistance. Follow this path and use dynamic label to analyse the pressure drops over different components. Compare these to the actual pressure drop and correct the wrong ones and recalculate.