The reason for the malfunction of the nozzle may be a defect in the water supply to the unit, in this case contact the customer service line or call an authorised/licensed service centre.
When inspecting the fault, pay attention to the water supply valve – whether it is closed or blocked (without water supply the unit cannot function).
The washing nozzle will also not work properly if it is clogged or scaled up. In this case, clean the nozzle using the “manual nozzle cleaning” programme (see product-specific instructions for details). In addition, it is advisable to carry out a descaling process for the unit, this will take care of the whole system and get rid of lime deposits from the washing toilet.