The machine is trying to go through a cycle low on water as it thinks it has enough already. Remove the big filter pan in the sump under the lower basket. On the right hand side you will see a plastic "turret" with a cover. undo the cental screw, lift off cover. Inside are two syphon tubes, which also lift out. These are probably blocked with grease, or the associated pipework in the sump in the vicinity. Try clearing the syphon tubes out first. The correct fill level is about 1/2 inch above filter pan. Set cycle, listen 'till wash pump comes on. Turn off . Open door and check. Other problem, very unlikely, is pump running slow.
Ric, April 2005