As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, RECONFIGURE BLEEDS AND AC PACKS. ZONE TEMP LIGHT FOR CONTROL CABIN ILLUMINATED. WOULD NOT EXTINGUISH WITH MASTER CAUTION RESET. TEMPERATURE WAS CONTROLLABLE. ACFT GROUNDED. AFTER ENGINE SHUTDOWN, SYSTEM OPERATED NORMAL. RAN NR 2 ENGINE AT IDLE AND CHECKED PACK OPERATION. CHECKED NORMAL.