What was found
CLT - EN ROUTE FROM PBI TO CLT, THE CABIN PRESSURE CONTROLLER FAILED IN AUTO AND ALLOWED CABIN TO VERY GRADUALLY CLIMB TO 10,000 FEET. EMERGENCY DESCENT WAS ACCOMPLISHED. CREW SWITCHED TO STANDBY AND CONTROL OF CABIN WAS REGAINED. THE AUTO FAIL LIGHT DID NOT ILLUMINATE. PRESSURIZATION WORKED NORMAL IN STANDBY. FLIGHT CONTINUED AND LANDED AT CLT WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE CABIN PRESSURE CONTROLLER PER MM 21-31-00. OPERATIONAL CHECK GOOD.