As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLEED AIR: TRANSFERRED BLEEDS FROM APU TO ENGINES, SHUT DOWN APU. BEGAN NOISE ABATEMENT TAKEOFF. BOTH CREWMEMBERS DETECTED SMOKE SO WE ABORTED TAKEOFF. DID NOT RECEIVE A SMOKE OR FIRE WARNING FROM ENGINES, APU OR BAGGAGE. NO SMOKE DETECTED IN AFT ACCESS AREA. NO BLEED FAULT CAS. REMOVED AND REPLACED ACM PN OFF/ON 3471A020000, SN OFF 00999, SN ON 00647.