EMB ERJ 170/175 ER/LR
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
Aircraft had 2 MEL's on it. Pack 1 was inoperative and the Ram Air dampers. On initial climb out; we received a Bleed 2 Overpressure. The QRH procedure was run and [it] did not reset the message. We continued the QRH procedure which led us to use crossbleed which didn't work. The procedure led up to [a landing] at the nearest suitable airport. Because Pack 1 was inoperative we had no pressurization as well since we lost pack 2 with the bleed overpress and crossbleeding didn't work. The aircraft had a history of Bleed 2 overpressure.
[Report narrative contained no additional information.]
EMB-175 flight crew reported returning to departure airport after the sole remaining air conditioning/pressurization pack failed in flight.