CE680 flight crew reported a diversion due to cabin pressurization failure.

Attributes
ACN	1521047
Time
Date	201802
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	Cessna Citation Sovereign (C680)
Operating Under FAR Part	Part 135
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Pressurization System
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 8900 Flight Crew Type 250
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance

Narrative:

During climb to FL320; we experienced a cabin altitude caution. We informed ATC we were going to level at FL250 to work the problem. As we began running the QRH and we got a red cabin altitude cas. We then initiated a descent to 10;000 feet even though ATC told us to descend to FL190 and proceed to the zzzzz intersection. We continued through FL190 to 10;000 feet as the situation called for and maneuvered the aircraft as necessary during the descent before proceeding to the zzzzz fix. We then diverted.

Original NASA ASRS Text

Title: CE680 flight crew reported a diversion due to cabin pressurization failure.

Narrative: During climb to FL320; we experienced a CABIN ALTITUDE Caution. We informed ATC we were going to level at FL250 to work the problem. As we began running the QRH and we got a Red CABIN ALTITUDE CAS. We then initiated a descent to 10;000 feet even though ATC told us to descend to FL190 and proceed to the ZZZZZ intersection. We continued through FL190 to 10;000 feet as the situation called for and maneuvered the aircraft as necessary during the descent before proceeding to the ZZZZZ fix. We then diverted.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.