As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING RECALL CONTROL CABIN ZONE TEMP LIGHT ILLUMINATED, EXTINGUISHED WITH RESET. ACFT GROUNDED. RESET CONTROL CABIN TRIM VALVE FAULT ON THE NR 2 PACK/ZONE TEMP CONTROLLER. ACCOMPLISHED BITE TEST ON THE NR 2 PACK / ZONE TEMP CONTROLLER IAW AMM 21-61-00. NO CURRENT FAULTS NOTED. GROUND VERIFICATION SUCCESSFUL.