You have a leak somewhere.
Unplug m/c
Turn it onto its side, preferably over some old towels or dust sheet etc etc, anything to soak up water, SO do it slowly. Check the pipe work, could find a hole, or a bad fitting, anything. That is most likely. It is coming from somewher under there. find it. Might be some staining, showing where it has come from. replace repair as necessary
SD, December 2012