As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT WITH THE RT AIR CONDITIONING PACK DEFERRED, THE -L PACK HIGH TEMP- CAUTION MESSAGE ILLUMINATED. THE CREW FOLLOWED THE QRH PROCEDURES, RETURNED TO CLT, AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE LEFT PACK COMPRESSOR DISCHARGE OVER TEMERATURE SWITCH. THE LT PACK OPERATIONALLY CHECKED GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.