As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AFTER START PROCEDURES, RECALL SELECTED, MASTER CAUTION WITH AIR COND ILLUMINATED BOTH PACK LIGHTS ILLUMINATED QRH CONSULTED WITH NO RESULTS BOTH PACK LIGHTS EXTINGUISHED WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED PACK ZONE TEMP CONT BITE ON NR 1 AND 2 AND RAM AIR FAULTS IN BIT/BOTH CONTROLLERS NO FAULTS IN HISTORY AND PERFORMED VERIFY TEST BOTH PZTC'S NUMEROUS TIMES. NO CURRENT FAULTS NR 1 AND 2 PACK OPS CKS GOOD IAW AMM 21-51-00.