M.T.H. Premier UP 4-6-6-4 Challenger Operator's Manual page 20

F22 – Coupler Slack
When an engine hooks up and pulls a train it has to take up the coupler slack. You
can play this sound by pressing F22 twice (toggling on then off). This feature works
two ways – While the engine is sitting still, press F22 twice to enable it. Then, when
you move the engine, it will play the Coupler Slack sound.
The second way is to simply force the sound while the engine is moving. To do this,
simply press F22 twice (toggling it on then off). The sound will play.
F23 – Coupler Close
To play the Coupler Close sound press the F23 button twice (toggling it on then off).
You can play this sound as you're coupling cars together to add realism.
F24 – Single Whistle/Horn Blast
To play a Single Horn Blast press the F24 button twice (toggling in on then off). This
plays a single, short horn blast.
F26 – Brake Sounds
Pressing the F26 button (enable F26) will disable the Brake Sounds for your engine.
The Brake Sounds occur when you reduce the speed of your engine rapidly. To enable
the Brake Sounds press the F26 button (disable F26). Brake Sounds are On by default.
F27 – Cab Chatter
Cab Chatter occurs when the engine is sitting at idle. There are various times when the
crew will talk to each other when the engine is sitting at idle. Pressing the F27 button
(enable F27) will disable the Cab Chatter. Pressing the F27 button again (disable F27)
will enable Cab Chatter. Cab Chatter is On by default.
F28 – Feature Reset
Resets Features to defaults.
Premier UP 4-6-6-4 Challenger Steam Engine
20