The first IC3 set was delivered in 1988, but unfortunately suffered from a number of teething problems, primarily due to its (at the time very advanced) computer systems. One example was that it would lock the toilet door with no apparent reason (it was programmed to lock the door when either someone was in there and requested so via a button, or when the toilet-system suffered a problem). Another issue was that snow would build up around the diaphragms blocking the drivers view. By late 1990, the majority of these problems had been solved, and so the train entered service in 1991.