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You need to undo the drain hose from the kitchen drain pipe under the sink and make sure the sink connection isnt blocked. This means sticking your finger into the hole etc,, and feeling around.

Failing that, you need to undo the inlet water supply hose also and unplug the dishwasher, wind down the front legs and un install it forward out of the kitchen cabinetry etc..

Once you have it removed from the cabinet, you can then follow the drain hose up into the dishwasher cabinet to the drain pump and undo the clamp there and check bothy the hose and the pump for blockages. This may involve laying the machine on its side*

If no blockage is apparent, then you might need to replace the drain pump assembly on your dishwasher. The best people for this kind of part is Blanco, as this brand is not usually stocked by a lot of parts suppliers.

Any further questions, just ask*

Here:
BLANCO:
1300 739 033
http://www.blanco-australia.com/Authorised-Service-Centres.html