Below is a list of the Function keys and their assignments applicable to this model. F0. Lights on/off (where fitted) F1. Sound on/off F2. Long whistle (press once and whistle will sound until pressed again) F3. Short whistle F4. Buffer up F5. Coupling up F6. Injectors F7. Drain cocks F8. Safety valves F9. Carriage door slam F10. Guards whistle F11. Buffer ‘clash’ on wagons (8 seconds) F12. Wheel/track ‘groan’ F13. Shunt mode (half speed) F14. Accel/Decel over-ride F14. Aux 1