ESU V5 Sound GWR 14XX Sound Decoder.

F1. Sound on/off
F2. Whistle (long)
F3. Whistle (short)
F4. Buffering up
F5. Coupling up
F6. Injectors
F7. Drain cocks
F8. Safety valve
F9. Guards whistle
F10. Carriage door ‘slam’
F11. Auto ‘bell’
F12. Sleeper/track ‘groan’
F13. Shunting mode. Press once the loco goes slowly, press it again and you are back to normal control.
F14. Acceleration/Deceleration over ride. Press once to over ride, press again to return to preset settings.
F14. Aux 1