As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5500 - DURING TAKEOFF ROLL RECEIVED A RIGHT AIR CONDITIONING PACK HIGH PRESSURE CAUTION, ABORTED TAKEOFF AND RETURNED TO THE GATE. PERFORMED AN OPERATIONAL CHECK OF THE AIR CONDITIONING PACKS, DISCREPANCY COULD NOT BE DUPLICATED.