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Atlas #544099 and #447399 DCC Decoders
11
Atlas Model Railroad Co., Inc.
Troubleshooting Decoder Programming Problems
Fault Cause and Solution
Locomotive does not
move when you
address it on DCC
system.
Check to see if you have selected the correct address for that
locomotive.
Locomotive does not
move when DCC
system is set to the
address in CV1, even
though this address can
be read from CV1.
You have used the single-byte address (CV1), but the decoder is
still set to the extended (two-byte) locomotive address, i.e., bit 5 of
CV29 has been set.
Use the extended address or else clear bit 5 of CV 29.
Locomotive does not
move when DCC
system is set to the
address in CV1, even
though this address can
be read from CV1 and
DCC functions can be
activated when DCC
system is set to the
address in CV1.
Check whether to see if a consist address has been programmed
into CV19, i.e. check to see whether or not CV19 has a value
greater than 0. If CV19 has a non-zero value, you must either use
this consist address to operate the locomotive or else program the
value 0 into CV19.
Function 0 (lighting)
cannot be switched on
and off.
Matching of speed steps is incorrect: The decoder has been set to
28/128 speed steps, but the DCC system has been set to 14/27
speed steps.
Either set the DCC system to 28 or 128 speed steps or else change
the decoder speed step setting to 14/27 speed steps. (CV29.1 = 0).
Locomotive headlights
are only illuminated
when the locomotive
speed is increased or
decreased; the
locomotive headlights
go on and off as the
locomotive speed
changes.
Matching of speed steps is incorrect: The decoder has been set to
14/27 speed steps, but the DCC system has been set to 28 or 128
speed steps. Either set the DCC system to 14/27 speed steps or
else change the decoder speed step setting to 28/128 speed steps.
(CV29. 1 = 1).