Train encountered power fault at rear M2car while departing station. Reset at MRB1 - ok. Fault recu rred departing MRB. Unable to reset at RFP . Unable reset atCTH. ~~~~~ Train encountered power fault at rear M2     #2529 Power fault-FC 108,137,820,821.Check CCD fuse ok.Check L1 ,L2,K coil ok.Check no sign of loose connection.Found K contact tip worn-replaced new ok.Check F1 fuse ok,check HB ok. Found 3 pcs pre-charging resistor OL and replaced done.Check INV1,INV2 ,BCH,BRE-satis.Conduct static propulsion test ok.Limited movement ok.Pow gate ok. Done by Saini/Zulq.  25/09/21