The first member of the class arrived at Poprad in mid-October 2000, after being displayed at the International Engineering Fair in Brno. On 19 October 2000, it made its first trip on the TEŽ, an unpowered run to Starý Smokovec behind a Class EMU 89.0. Between November 2000 and March 2001, the class leader, numbered 425.951, underwent testing on the network. It then operated trial runs with passengers.
