APS indicator at front M1 car was flickering, fault self cleared , intermittent. Staff (LVR( checkedand confirmed no fault in all the cars ~~~~~ 1553- Checked & Observed fault able to duplicate. Observed 1553 A/c #1 causing APS fault. Further check found 1553-A/c 1-2 compressor motor shorted. Notification raised for 1553 A/c 1 CCU C/o. 1553 A/c 1-2, 3 phase wire isolate & Insulated with tagged.    Azhar / Mahmud. 04.08.2022. Noti for CCU C/o- 2405251.