Train encountered power fault at rear M1car while departing station. Reset - ok. ~~~~~ 1536 encountered power fault departing station. Reset - ok. CE check no sign of power fault. OE REQUEST DEPOT CHECK.  1536 D/L & found FC 141/108/150/820/821. Checked SAP & found Propulsion Relay Unit was swapped from #1535. OPS 20 raised to follow-up.  Au TK 44295 Follow up rectification.  1536 Relay Unit replaced. Limited & depot movement, checked - OK. No sign of power fault indication.  Wong/Anand 44295