What was found
CABIN PRESS, EXCESSIVE ALTITUDE WARNING AT CRUISE, ECAM CABIN PRESS PAGE SHOWED CABIN AT 5200 FT WHILE CRUISING AT FL 320, CABIN PRESS FLUCTUATIONS ON DESCENT. DIVERTED & EMER DECLARED. TROUBLE SHOT IAW TROUBLESHOOTING MANUAL 21-31-00-810-809A, EXCESSIVE CABIN ALTITUDE. REPLACED OUTFLOW VLV IAW AMM 21-31-51. OPERATIONAL & FUNCTIONAL CHECKED GOOD, NO FAULTS NOTED. WORKED IN CONJUNCTION WITH SDR 2014123000014.