TC reported intermittent APS fault. Staff(AMK) checked and confirmed no abnormalities on all saloon cars. Train performance ok. TC reported intermittent APS fau lt. Staff(AMK) checked and confirmed no abnormalities on all ~~~~~ Checked and found FC:408 & 414 inverter over current. APS fault due to #1556 A/C 1-1 shorted to ground. Disconnected UVW and tagged. Monitored further no recurrence of APS fault. Raised notification to HM to c/o 1556 A/C 1-1 CCU. Notification no: 2522599 Done by: Saini