Smeg dishwasher problems draining

The appliance must stand level and on firm ground. The floor should be clean and free from floor polish and grease. The appliance has adjstable feet at the front. If necessary adjust the front feet. Should the machine be built under a worktop in a built-in kitchen, it may be necessary to remove the table top of the machine.
NOTE: To comply with Safety Regulations, the machine must be installed in such a way that there is no access to live parts or internal connections with functional insulation.
The appliance should be connected to a hot water supply up to a maximum of 70°C.
NOTE: The machine must not be connected to single outlet instantaneous electric or gas heaters.

The machine may be connected:
directly to a tap with 3/4 inch BSP thread termination. to a T-junction on your existing tap preferably, to a completely separate water supply in order to avoid interference with the kitchen water supply during operation of the machine.