PID feedback warning is caused by the limits set in PID feedback monitoring.  If PFAH warning is displayed, it means that PID feedback has reached high threshold PAH [PID feedback high threshold].  Additionally if relay output has been assigned to PID feedback warning, it would be activated as well.  See extracted pages to fix high PID feedback warning. Increase PAH or lower PAL in order to always have PID feedback in this area PAL-PAH.

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