As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK AND START UP ON MASTER RECALL, WE HAD ZONE TEMP LIGHT UP ON THE OVERHEAD CONTROLLER CAB, IT EXTINGUISHED WITH THE RESET. ACFT GROUNDED. CONFIRMED FAULT, NR 2 PACK ZONE TEMP CONTROLLER SHOWS FLT DECK TCV, V143, FAULT. NR 1 PACK ZONE TEMP CONTROLLER SHOWS NO FAULTS. R & R FLIGHT DECK TCV REF AMM TASK 21-61-21. ACCOMPLISHED GROUND FUNCTIONAL CHECK & PACK/ZONE TEMP CONTROLLER BITE TEST NORMAL REF AMM TASK 21-61-00-700-806-002.