As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS MSG APU BATTERY. REPLACED BATTERY, NO HELP. RELOADED ELMS P310 ELECTRONIC UNIT OPC AND OPS SWICH PER MM24-09-00. THIS CLEARED STORED FAULTS. AFTER RELOAD ACCPLISHED TEST OF APU BATTERY & CHAGER TO ENSURE PROPER OPS. NO MESSAGES FOUND ON EICAS. ACCOMPLISHED OPS TEST OF THE APU BATTERY. OPS CHECKS GOOD.