Quaternary pump pressure reading wrong

Quaternary pump showed a wrong, non-responsive pressure reading even if no flow, how to fix it? It was used about 1.5 years ago without this problem.  Thanks.

Parents Reply
  • Thanks for your suggestion!  No PM was done in the past year due to software problem.  Now there is no computer issue, but pump showed a pressure 200+ bar even if it does not run and no flow at all.  And the pressure does not change AT ALL after turning on the pump and flow is increased from 0 to 1 ml per min.  Could the pump sensor problematic?

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