The Cabin Pressure Control Unit is an LRU part of the Cabin Pressure Control System.
This Unit integrate in a single LRU the functionalities of the Cabin Pressure Automatic Control and Cabin Pressure Manual Control reducing the system interconnection, the space and the weight.
The Cockpit Panel functionalities are implemented in EFIS and all necessary data exchanged via Arinc429 serial link interface.

– The Cabin Pressure Automatic Controller implements the Automatic Cabin Pressure Control driving the main OutFlow-Valve
– The Cabin Pressure Manual Controller is completely independent from Cabin Pressure Automatic Controller and it implements the main function to implement the Manual Mode driving the backup OutFlow-Valve in accordance with the discrete command received.