Flowserve Logix MD+ ValveSight - Manual (Page 90)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
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in the closed position, or an air-to-open valve held in the open position.
•
Possible Solutions: Ensure the supply pressure is not low. If alarm
persists for more than 30 minutes, the Piezo assembly is
damaged. Replace the pilot relay.