As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURIZATION ELECTRONIC SYSTEM IN MANUAL THERE IS NO OUTFLOW VALVE INDICATOR MOVEMENT WITH FUNCTION SWITCH IN AC MANUAL. VALVE VISUALLY OBSERVED AND IS NOT MOVING. THE CONTROL PANEL FAILED. REPLACED CONTROL PANEL. OPERATIONS CHECK NORMAL.