This afternoon at 13h20 UTC the Neovan chiller (for the electronics only) flow dropped from 6.5 to 1.7 (a.u.) (fig. 1).

We tried to recover the flow by changing the filter (which was very dirty) and reversing the in and out pipes at least three times. However, the flow never went more than 3.4.

Accidentally we switched off the Neovan by pressing the emergency button, so we profited to switch off also the chiller for a longer time and we tried it closed on itself: even in this case the flow didn't grew more than 3.4, so we concluded that it is the chiller pump or somethinf stuck inside, rather than the Neovan.

We left the system on since it seems stable even with a reduced flow (we changed the threshold for the DMS flag to be yellow instead of red). The temperatures of the pumping diodes of the Nevoan have increased but to an acceptable value (fig. 2).