As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERTED DUE TO AMBER CABIN PRESS CAS AND CABIN PRESS WARNING. MASKS DEPLOYED; CREW APPLIED RELATIVE MEMORY ITEMS, FOLLOWED QRH, DECLARED EMERGENCY, AND LANDED SAFELY AT KHPN. PERFORMED OPERATIONAL TEST OF THE INTEGRATED AIR SYSTEM CONTROLLERS IAW AMM 21-31-01. OPS CHECK GOOD, NO DEFECTS NOTED AT THIS TIME.