BL-2 Diesel Engine
11
Tips on Using PFA
•You can terminate PFA at any time by turning off power to the track for 15 seconds.
•You do not have to be in Forward to use PFA. At the conclusion of the full sequence, the train will pull away
from the station or yard in whatever direction you were going when you activated the feature.
•You can use PFA even if you are double-heading with another engine. If the second engine is not equipped with
Proto-Sound 3.0, you must remember not to leave the throttle at a high voltage level once you have stopped the
engine to run the PFA. Otherwise, the engine without PFA will begin vibrating on the track as its motors strain
to move the train, since they cannot be automatically disabled during the PFA cycle (or if an original Proto-
Sound engine, PFA are triggered differently and that engine’s motor®disable feature will not be acti ve when
you run PFA in Proto-Sound 3.0).
•PFA can be triggered from Neutral. It will operate the same as if triggered while in motion except that, at the
conclusion of the PFA, the engine will depart in the next direction of travel, as opposed to the direction it was
traveling before entering Neutral.
Proto-Coupler Operation
This locomotive is equipped with one or more coil-wound Proto-Couplers for remote
uncoupling action. Because Proto-Couplers are controlled through the Proto-Sound 3.0
microprocessor, they do not require an uncoupling track section or modification to your
layout to function. You can fire a coupler from neutral or while in motion. Use the code
shown below (and in the chart on p. 25)to fire the coupler(s).
Rear Coupler:
To fire the rear coupler, quickly tap the Bell button once followed by
three quick taps of the Horn button, allowing approximately ½ second to lapse between
each quick button press. The sound of the liftbar and air line depletion will play, and the
knuckle will be released.
Front Coupler:
To fire the front coupler (if your engine has one), quickly tap the Bell
button once followed by four quick taps of the Horn button, allowing approximately ½
second to lapse between each quick button press. The sound of the liftbar and air line
depletion will play, and the knuckle will be released.
Speed Control
M.T.H. engines equipped with Proto-Sound 3.0 have speed control capabilities that allow
the engine to maintain a constant speed up and down grades and around curves, much
like an automobile cruise control. You can add or drop cars on the run, and the engine
will maintain the speed you set.
Summary of Contents for 20-20701-1
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