You answered your question yourself, there is no pump in the aircraft thats dc, whether its a fuel pump or electrically driven hydraulic pump.
What your friend says is wrong, many defects generate fault messages without an ECAM warning, some fault messages are considered normal and negligible and mainly occure due to power transfers...etc and many of which are filtered out by the PFR filter.
Last edited by flame_bringer; 5th July 2012 at 08:30.