This year will be launched a tender for buying 10 new short trolleybuses.
These old trolleys have some iremedial problems at electrical components.

Initially the problem was incompatible voltage. Despite the new overhead, the old substations were kept, which operated at 750 V. I read this problem was solved by technicians from Salzburg, although I don't know whether changes were made to the substations or the vehicles. Despite this, numerous electrical issues with the trolleybuses did not allow them to operate for any prolonged periods of time. Hopefully the new trolleybuses will arrive soon.