#1601 Ac1 fault train prep to rectify. ~~~~~ #3601 Ac1 fault during train prep to rectify     Check and found Ac1 ACPCB1 trip by itself.Tim FC-530/528/527.Further check AC1 CCU motor and condenser fan motor resistance ok.Swap LVD2 crad to Ac2 monitor no fault found.Preventive measure to c/o LVD2 card and further test ok.Depot shunting observed Ac1 fault recure.Further check CCU motor current tong 10.5A ok.Replace Ac1 LVD1 and swop MCU to #2602 Ac1 monitoring 2 hrs no fault recure. Ac1 LVD2 card- Old s/n: 88482 New s/n: 80288 Not: 2440153 Ac1 LVD1 card- Old s/n: 88493 New s/n: 80901 Not: 2440223 Done by Koh/Rizman. 30/11/22