During DT found 1646 Power Fault (FC: 13 ~~~~~ During DT found 1646 Power Fault (FC: 13     #1646-FC-108/138 check INV1,INV2,BCH,BRC,Pre charging resistor-ok.Check CCD fuse ok.Check line breaker K1,K2,L1,L2 no looseness of cable.Replace K1,K2 contact tip due to worn out.Past history #2646 VVVF relay unit was swap to #1646 with the save fault code 108,138.Conduct no power test propulsion HB function ok.No power test    ok.Due to past history,replace VVV  relay unit.Conduct no power test-ok.Limited movement ok.Depot shunting ok. Done by Zulq/Asruddin/Haslan. 24/01/22