What was found
SHORTLY AFTER REACHING CRUISE ALTITUDE, THE CREW RECEIVED A CABIN PRESSURE NR 1 SYSTEM STATUS MESSAGE (CAB PR 1) DISPLAYED ON ECAM WITH AN ASSOCIATED CABIN PRESSURE "BUMP". IAW FCOM PRO-ABN-21 15/24 THE CREW CONTINUED TO DESTINATION. AFTER APPROXIMATELY 1 HR THE CREW RECEIVED A "CAB PRESSURE EXCESS CAB ALT ECAM" WARNING. THE CREW INITIATED A DESCENT TO FL100 AND DIVERTED. UPON ARRIVAL, LOCAL MAINTENANCE MET THE ACFT AND ACCOMPLISHED THE FOLLOWING AMM PROCEDURE AMM 21-31-00-710-002-A. THE NR 1 CABIN PRESSURE CONTROLLER WAS FOUND FAULTY AND DEACTIVATED IAW MEL 21-31-01-2. THERE WAS NO REPORT OF ACTUAL CABIN PRESSURE LOSS DURING THE EVENT. THE ACFT DEPARTED AND CONTINUED TO ITS FINAL DESTINATION WITHOUT ANY FURTHER FAULTS. THE NR 1 CABIN SYSTEM CONTROLLER WAS REPLACED AND THE SYSTEM WAS REACTIVATED.