Hi, if it's powered by a Zapi unit the Alarm code 24 is low VMN.
EV100 alarm 24 is T2 too high.
From what you have described I would say the forward contactor is not closing properly or reverse contactor has not returned fully to close the back contact tips.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.