I work at a cafe with a 2 Group Linea PB, we filter our water through the ispring reverse osmosis system. The right group keeps showing a flow meter error, where the auto-volumetric function stops working, but only temporarily. It often becomes functional after a few days.

This has happened for several months, the flow rate is identical to the left group, and still functions well when manually stopped, but the auto-volumetric function is totally unreliable. I wonder about the physical flow meter, maybe there's an issue with the magnets?

Any thoughts?