I have a Ryobi 14.4 volt battery charger. When I try to charge one of the battery packs I get a Yellow and green light on steady at the same time. The directions on the charger says "See owners manual" The owners manual is long gone. Not available at Ryobi.com.
Directions for another model charger does not have the combo yellow-Green light steady on as a problem. Yellow and Red in that manual is a defective pack.
Any idea what the code means?
I'm going to guess the battery pack is defective. It is old and other packs charge fine.

It is a Ryobi 14.4 volt charger model 1412001