Navigate through the keyboard using the << and >> keys (marked green). The numerical keys can be used to enter a two-digit number referring a certain maintenance mode, e.g. a test of sensors can be accessed by pressing 3 and then 2 (maintenance mode 32). Entered numbers will not show up on the display.

For a complete overview over all modes and functions, refer to the attached service manual, chapter 5 (overview: section 5.1.2).

For more information on the worker switch (WSW) settings (maintenance mode 10), refer to the featured reference of worker switch settings.

Single maintenance modes can usually be exited by pressing the Stop key (marked red).

In the main menu of the maintenance mode, enter 99 to exit maintenance mode.