If you are running Lifeline AGM's, they will almost alway start in bulk mode charging.They just won't flow any current through the charger. Pretty typical of AGM batteries. You might replace your current Progressive Dynamics with a 9200 series model, that comes with the pendant Charge Wizard. This makes the units voltage output manually adjustable.
It is very important to charge an AGM battery to 100% SOC daily, with a final charging rate of 1% amp of batteries 20 amp hour rating. What size are your batteries in amp hours capacity? Model # ?