There is one of our mech techs that is having some trouble with a Carrier Chiller Mod#19XR. It is throwing a M2 Contactor Failure and the technician believes that the aux contactor is not transferring the 5vdc properly. He remembers (vaguely) that there was a bulletin about the issue a while back but needs to provide that documentation for the engineers to approve repair. Throw/stops/coil have been checked. New Aux contacts have been installed. Any help will be greatly appreciated.