After saving Anna from the cell you'll get access to a combination key with 1 missing part. This part can be found in the Boiler Room by the washing machine on the bottom floor or inside Basement West by the toilets. Once fixed you can open the various doors across the manor but still require a combination. Here they are.
Chapel
Square Triangle Star
East Wing Corridor
Star Triangle Hexagon
West Wing Corridor
Pentagon Triangle Circle
Dining Room
Square Hexagon Pentagon
Adam Siddiqui,
Managing Editor, NoobFeed