RTAA200. vintage 1998. i havent found any SB on condenser fan motors failing, but a few chillers have no baffles to separate airflow between fan sections. in lower ambient conditions the fans cycle off and spin backwards. I think this is why the fail often. i have seen a fan spin backwards so fast, when the contactor pulled in it ran backwards. anyone know of any SB on this. I am thinking of installing vfd control on the fans, any thoughts?