A. the machine is under warranty but the necessary parts are out of stock (after our confirmation)
B. the necessary part for the repair is no longer marketed
C. the repair time has exceeded and the customer does not wish to wait any longer
D. the repair is not economically viable (the repair will cost more than the machine)
E. if a fault upon unpacking is observed
F. the repair is impossible / the fault is undetectable
G. any exception - commercial gesture
