Battery charger failed?

The amber light for the battery charger fail is on. Brand new batteries. When I unplug the batteries the battery light comes on (as expected) and turns off when I connect the batteries. The 15A battery fuse is good. Is there a simple fix to this or do we need to replace the whole thing? Fire protection contractor scheduled to look at it tomorrow. Just trying to troubleshoot on my one until then.

FCPS-24S8