TC reported Front M1 car intermittent converter train fault. Train performance - ok. Staff(CCK) chec ked andconfirmed Front M1 car intermittent converter trainfault. ~~~~~ TC reported Front M1 car intermittent co Check and found #1682-A/C 2-2 CCU motor shorted to ground.U/V/W isolated and tag.Notification raise for CCU motor c/o. Not: 2444134 raise. Done by Rizman/Koh.  12/12/22