This is normally a blockage in the pump that lifts the water from the pump chamber to the water bottle.
Unplug the appliance.
Take the top and left side panel off. (On some, the facia has to come off too).
Follow the hoses down and you'll come to the pump.
Take the hoses off, blow up them to ensure they are clean and clear.
Take the pump out.
Clean out any debris jamming the pump and clean out the pump chamber.
Take the condenser out.
Clean it out thoroughly, clean out the chamber it fits into.
Reassemble and try the machine again.
It should now pump the water up to the water bottle or out of the drain hose.
You will need Torx drivers or bits to remove the screws.
Check it out, see what you find and get back to me if you need more help.
Obviously, if you cannot do the work yourself, you'll need to get someone in to do it for you.
Hope this helps