PREFORMED #1 SERVICE. ISSUE OF RUNNING WHILE UTILITY PRESENT WAS BOTH N1 AND N2 FUSES WERE BLOWN IN ATS. CUSTOMER HAS HAD PREVIOUS ISSUES WITH THE SAME PROBLEM. WHILE PREFORMING DIAGNOSTICS I FOUND AC VOLTAGE ON 194 AND 23. JUST TO RULE OUT THE SACM BOARD IN ATS I REPLACED IT. STILL HAD AC VOLTAGE ON 194 AND 23 INSIDE GENERATOR. SACM BOARD IS NOT THE CAUSE OF AC VOLTAGE ON 194 AND 23. TO REMEDY PROBLEM THE CONTROL WIRES FROM ATS TO GENERATOR WILL NEED TO BE REPLACED. PER CONVERSATION WITH BRANDON HE WILL REACH OUT TO MR SHURLING AND SCHEDULE A DAY IN THE UPCOMING WEEK TO HAVE CONTROL WIRES REPLACED.