EMB ERJ 135 ER/LR
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Upon departing ZZZ; our plane reached 10;500 feet and flight crew's ears automatically popped. Upon diagnosing what happened; we noticed the cabin altitude rise into a red warning of 10;000+ feet and cabin rate went to f dashed lines in orange color. We leveled off right away at 11;000 feet; assessed the problem; and communicated with ATC (Air Traffic Control) that we had a pressurization issue. ZZZ Departure took us down to 10;000 feet fairly quickly.  Once we got to 10;000 feet; ATC turned us around and vectored us for a XXR landing. The issue was diagnosed carefully by both cockpit crew; and while the Captain PIC (Pilot In Command) started to problem solve; the SIC (Second In Command) flew the plane and communicated with ATC. The plane arrived back in ZZZ safe and sound with no injuries.
EMB-135LR flight crew reported a pressurization problem during climbout.