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TGR Light fault and EHG light fault alarms are continuously repeating due to deviation in difference b/w Admission Control Valve Command and Admission Control valve Feedback. We have CCPP with 64MW Steam Turbine of FUJI Electric. Initially alarm was set up to difference of 8 b/w ACV command and Feedback, Alarm was repeating itself after few hours. When difference was increased up to 12 Alarm appeared after some long time. but now ACV Command Output is showing zero while feedback is 98. that's y alarm is persisting it self whole the day. Governing system is controlled by TGR PLC.
