As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER TRANSFER TO AC APU SHUT DOWN, " APU FAULT". GROUNDED - YES. PERFORMED APU BITE; NO CURRENT FAULTS. PERFORMED APU START AND SHUTDOWN; NO FAULTS. INITIAL EVALUATION PERFORMED. REF. FIM 49-90 TASK 809, FIM 44-60 TASK 802, AND FIM 49-10 TASK 801.