Patent ID: 8845814
Filing Date: 2014-09-30
Classification: A47L

Abstract:
1. A method for operating a washer which comprises a washing chamber for accommodating goods to be cleaned, said washing chamber having in its lower portion a sump for collecting water during operation of the washer, a water inlet connected to a water tank detachably formed with the washer, a circulating pump for circulating water through the washing chamber, and a control unit for controlling a washing cycle carried out by the washer, the method comprising in subsequent steps: (a) feeding water from the tank via the water inlet into the sump by action of hydrostatic pressure prevailing within the water tank; (b) at least twice measuring pressure within an inlet or outlet conduit of the circulating pump by a pressure sensor when the water inlet is opened to feed water into the sump and storing the measured values; (c) comparing the values of subsequent measurements made during step (b) to obtain a differential value; and (d) generating a warning message to a user of the washer if the differential value obtained in step (c) is less than a predetermined value.