What was found
ON TAKEOFF ROLL AT LAS EN ROUTE FOR PDX NR 2 BRAKE TRIGGERED HOT BRAKE ECAM MESSAGE, REJECTED TAKEOFF AT 85 KTS. NR 2 BRAKE INDICATED 580 CELSIUS MAXIMUM TEMPERATURE. MAINTENANCE PLACED SYSTEM ON MEL 32-47-01, COND 1 NR 2 BRAKE TEMP MONITORING UNIT INOP AND COMPLIED WITH MEL TASK PROCEDURE 05-51-16-700-001. WHEN AIRCRAFT ARRIVED BACK IN LAS MAINTENANCE REMOVED AND REPLACED THE NR 2 BRAKE TEMPERATURE SENSOR IAW AMM 32-47-15-401. PERFORMED BRAKE SYSTEM TEMPERATURE ADJUSTMENT TEST IAW AMM 32-47-00-501 AND ALTERNATE BRAKE & ANTI SKID SERVICING IAW AMM 32-43-00-301, SYSTEM OPERATES NORMALLY.