As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AIR CONDITIONING PACK LIGHT CAME ON INFLIGHT, NO RESET. THE FLIGHT DIVERTED & LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. THE LEFT PACK WAS PLACARDED & THE ACFT WAS RELEASED FOR SERVICE. R & R LT PACK COMPRESSOR DISCHARGE OVERHEAT SWITCH ON LT PACK IAW AMM 21-51-40. OPERATIONALLY CHECKED GOOD. REMOVED LT PACK PLACARD.