Try to drain machine by running the outlet pipe into a bucket.
Check the filter unit for blockages. Disconnect pump from sump hose and check for obstruction in either item. Pump removal: power off, remove cover, locate pump, (attached to other end of drain pipe).undo 2 wiring connections, 2 hose connections, and pump mounting screws. Remove pump chamber - some are held in with screws, others clip into place. Check for foreign objects round the impeller. If pump chamber is clear, may be a fault with the pump motor - in which case, replace.
Check out www.2ndwave.co.uk/manual.html
dannyboy
October 2008