What was found
(CAN) WHILE IN CRUISE, AT FL370 THE CABIN CONTROLLER FAILED, THE CABIN CLIMBED IMMEDIATELY TO 9800FT. THE CREW HAD THE CABIN CONTROLLED AND REDUCED ALTITUDE TO FL310. FLIGHT CONTINUED TO DESTINATION AT FL310. THE DESCENT WAS SMOOTH AND THE O2 MASKS DID NOT DEPLOY. OUTFLOW VALVE ELECTRONIC MODULE 2 FAULT, CODE 52.