As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT THE CREW RECEIVED A RED WARNING PANEL INDICATION AND A CABIN ALTITUDE CAS MESSAGE. THE CREW REFERENCED THE QUICK REFERENCE HANDBOOK THEN ADVISED MAINTENANCE CONTROL FLIGHT 4014 WAS RETURNING TO PIT. MAINTENANCE INSPECTED AND REPLACED THE PRESSURE CONTROL UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 35-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.