I don't believe I would blame the alarm problem entirely on Pfaff. The circuit boards are manufactured by an outside factory in China who has a contract with SVP to make the boards. If there is a problem with the board that, fortunately, has been identified, and Pfaff is stepping up to the plate to fix it go ahead and get your machine fixed. Sometimes companies, like automotive companies, only offer a full replacement of a part for a certain amount of time because of failures due to normal wear and tear on components. After the time limit they pro-rate the repair. I would definitely get my machine on the list to be repaired.
Where Pfaff can take blame is for dropping the ball in the Quality Control dept.