Pump in variable part of mixing circuit
The error message:
This error allows you to keep calculating but is a hydraulic error.
Meaning:
There are 2 pumps which are placed in ‘series’. The error shows up here because the second pump is placed after a mixing valve. When the valve is fully open the pumps are in series
How to solve this error:
It may be that this installation is correct, hence, an accurate check to verify should be done. Otherwise, remove one of the pumps to fix this error.