What was found
AFTER ENGINE START, ESTABLISHED ENGINE BLEEDS, THE AUTOFAIL ALT GREEN LIGHT ILLUMINATED AS WELL WHEN MASTER RECALL IS PUSHED AIR COND ILLUMINATED, CONTROL CABIN ZONE TEMP LIGHT. GOES OUT. ACFT GROUNDED. CONFIRMED CONTROL CABIN ZONE TEMP ANNUNCIATOR ILLUMINATED WITH MASTER RECALL. PERFORMED BITE TEST OF 1 & 2 PACK ZONE TEMP CONTOLLERS. FOUND NR 1 WITH FLIGHT DECK TRIM VALVE FAULT LIGHT ON IN PREVIOUS FLIGHTS. CONTROLLER WITH BITE TEST IAW AMM 21-61-00 AND FAULT LIGHT EXTINGUISHED. SUBSEQUENT BITE TEST PERFORMED, OPS NORMAL, NO FAULTS. ZONE TEMP ANNUNCIATOR NOW REMAINS EXTINGUISHED WITH MASTER RECALL. NO HISTORY LAST 30 DAYS. GROUND VERIFICATION SUCCESSFUL.