Patent Document ID: 20110297189
Application ID: 13111988
Patent Flag: 0

Claim One:
1. A dishwasher having a washing cycle and a washing compartment for accommodating the items to be washed by the washing cycle, said washing compartment having an inlet valve, said dishwasher comprising: a control device for carrying out the washing cycle to clean the items to be washed, the inlet valve being adapted to be opened by the control device, said washing cycle including a fill phase in which the inlet valve is opened for filling the washing compartment with washing liquor; a recirculation pump for recirculating washing liquor present in the washing compartment, said recirculation pump being switched on during said fill phase, said control device controlling the recirculation pump and being adapted to execute an algorithm for varying the speed of the recirculation pump, said algorithm having a speed variation step in which the control device uses a default value to vary the speed of the recirculation pump; and a true running monitoring unit adapted to execute a true running test that checks the operation of the recirculation pump, said algorithm for varying the speed of the recirculation pump determining a new default value using the steps of executing a true running test, and modifying the default value in response to the result of the true running test, said modifying step providing a default value for use in a next iteration of the speed variation step.