Why is my Servis Easi Logic 1500 not draining?

We got a friend's Servis Easi Logic 1500 washer/drier last week second hand. It was transported without the transport screws in it (bad, I know).... Since installing it here, everything is running fine and quietly, except it does not drain. The lights say the programme has ended, and you can open the door - at which point the water is all over the kitchen floor! We have checked the hose connections but don't know what to try next