TC reported APS fault. Staff(ORC) checked and informed rear M2 car intermittent converter fault. TC confirmed train performance - ok. ~~~~~ TC reported APS fault. Staff(ORC) checke     Checked and found #2660 FC 414 APS inverter overcurrent,FC 408 APS fault occurred multiple times.#2660 APS fault occurs intermittently ,when a/c cuts in.Found #2660 a/c 1-2 shorted to ground,isolated U-V-W a tagged.Monitored APS fault does not recurrance when a/c 1 cuts in. Not: 22770426 raise to RSW. Checked by Haikel. 25/04/21