What was found
ENROUTE, CREW RECEIVED AN ECAM "AIR PACK 2 FAULT" WITH PACK 1 ALREADY ON MEL, FOLLOWED QRH PROCEDURES DONNED MASK AND DECLARED AN EMERGENCY FOR RAPID DESCENT TO 10,000 FT. DURING DESCENT PACK 2 RECOVERED & CABIN ALTITUDE HAD REACHED 7,000, PASSENGER MASKS DID NOT DEPLOY. ACFT DIVERTED AND LANDING WAS UNEVENTFUL. PACK 2 HAD COMPRESSOR OVERHEAT TEMPERATURE SENSOR REPLACED AND PACK 1 HAD THE FLOW CONTROL VALVE REPLACED AND TESTS OK.