Dismantling the front face of the condenser CTD00:?

Trying to clean out the front of the sludge filter of my Aquaris CTD00: If I remove the two side screws which appear to hold the front cover/deflector in place on the condenser unit, one side is moveable but is there a hidden catch to release the top side, so I can get a hoover nozle directly onto the face of the heat exchanger? I have cleared the front slope, but feel I should do more!

Duncan, Truro
November 2009