TIMS showed APS fault. Staff(BGB) checked and confirmed unable to locate APS fault in all six cars. Train performance - ok. TC feedback APS fault was intermitte nt. ~~~~~ Checked and found FC 408,414 3633 AC1-2 CCU motor UVW shorted to ground. Notification raised for HM to follow up with CCU C/O. Notification no: 2565756 Done by: Saini