I worked with fault finding for twenty years now. Have worked in big and small companys and different countrys.
My experince is that these cartell companys are trying to make it difficult for others to fix their elevators. Of course they do. How else they could have prices of repairs so high?
What happens is that there are no competition which makes the cartell eaven stronger. And it is the end user the lift owner and the people who are paying overprice of monopoly service when they have no choice but to buy the service and repairs from the original lift manufacturer.
It was a same thing with automobiles years back but the codes and tools are now free for anybody.
