As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURE MASTER WARNING UPON MAIN CABIN DOOR CLOSURE AT GATE GROUNDED - YES. RESET C/BS' ASSOCIATED WITH CPC 1 & CPC 2 & RPCU AND PERFORMED BITE TEST REF 21-31-00 PB 501 OK: CLOSED ALL PAX DOORS AND TURNED ON PACKS: NO FAULT GENERATED