I have an F7 Asko D5131 dish washer showing F7 how can I fix this?

The "F7" code means that the drain is blocked. To remove items from the drain: 1.Turn power to unit off. 2.Remove the "Coarse Filter" by squeezing the tabs together and lifting out. 3. Remove the "Fine Filter" and "Main Filter" by removing the screws around the filters and lifting them out. 4.Remove the small black adapter piece and check the sump area for debris. 5.Wash the filters out gently with hot, soapy water. Do not run the unit without the filters in place! 6.Replace the black adapter piece to its original position FIRST (Important!). 7.Replace the filters in reverse order of removal and turn the unit back on. The error code should reset and work normally. *In areas with hard-water, the filters should be removed every 8-12 months and submerged in a chemical solution (CLR or LimeAway) to remove mineral deposits