Sounds like blocked drain hole, it may be that there is too much ice blocking it and it can't defrost it all before it comes back onto freeze. Empty and thoroughly defrost (doors open, drawers out, plenty of towels down) for a good 48 hours, then try again. If it still chucks water on the floor then defrost again and try your best to poke some thick-ish wire down the drain hole, and be aware of the evaporator, don't poke this too much!!! Good luck
BFT, March 2008