If you have a European dishwasher and the instructions are telling you to add softener, read below.
The water in Europe is very different to the water here in Wellington. The water in Europe is very hard due to the minerals and calcium it contains. Therefore softener is required to be added to your dishwasher before commencing its cycle.
But in Wellington the water is not hard, in fact it is very soft and nothing needs to be added or no adjustments are required before commencing its cycle.