What was found
(CAN) 1. A/C DEPARTING AT APPROXIMATELY 100 KTS. INTERMITTENT ECAM MASTER WARNING & CHIME MESSAGE DISAPPEARED WITHOUT OBSERVING ECAM. 2. AT APPROXIMATELY 155 KTS MASTER WARNING ON ECAM, MASTER CAUTION & CONDITIONS CHIME.3. SUCCESSFUL REJECTED TAKEOFF CARRIED OUT. NO MESSAGE FOUND ON ECAM FOR FAULT. 4. 8 MAIN WHEEL ASSEMBLES & BRAKE ASSEMBLES REPLACED I.A.W. 32-12-37 & 32-42-12. 5. DFDR REMOVED FOR INVESTIGATION. 6. NO FURTHER PROBLEM FOUND ON SUBSEQUENT FLIGHTS.