As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE, FOLLOWING 24-00-01-01 WHICH REQUIRES RUNNING APU FOR SECOND GEN DUE TO INOPERATIVE LT GEN. APPROX 2 1/2 HOURS INTO FLIGHT "ADD OIL" APU STATUS MESSAGE APPEARED. ABOUT 15 MIN LATER, THE APU FAULTED AND SHUTDOWN. FOLLOWED QRH AND ATTEMPTED ONE START. APU FAULTED AGAIN. WERE DOWN TO ONE GENERATOR AND FOLLOWED QRH WHICH STATES TO LAND AT NEAREST SUITABLE FIELD. DIVERTED. INSPECTED APU, NO DEFECTS NOTED. OK FOR SERVICE.