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7fa unit, we are getting a trip from the lube oil header high temp logic (alarm P55). I have pulled the temp switches (26QT-1A & 1B), (26QA-1). they were spot on. also checked the analog temp element (LT-TH-1A & 1B) did not find anything wrong. So we moved to the Mark6, changed the card & cables on 1I1 card which has the alarm & one of the trip switches. The logic calls for the alarm and 1 high temp switch or both high temp switches to trip. We never see any alarm or high temp switch and the analog temp indication never wavers from 130F (alarm @ 165 trip @175) the trip has shut the unit down. the trip also comes in while the unit is not running.
Any help will be greatly appreciated
Any help will be greatly appreciated