Locomotive Diagnostics - Lionel SD90MAC Owner's Manual

Maintaining and servicing your locomotive

Locomotive diagnostics

Y
our locomotive includes built-in diagnostics to monitor the condition of the main drive motor
and smoke system. If a problem is detected, the locomotive's cab light will blink a diagnostic
code.
If you see the light inside the cab flashing, press RESET (for LEGACY operation), 0 (for
TMCC operation), or DIRECTION/power interruption (for conventional operation to attempt
to clear the problem. The locomotive will immediately check itself again. If the problem
persists, the cab light will blink the code again.
Note that smoke-related errors can be reset a maximum of three times. On the third try,
if the problem still persists, the smoke unit will be shut down. After reaching the three-cycle
limit, the power must be cycled (turn off and back on) and then you may try to reset three
more times. If the problem persists, it must be returned to a local Factory Trained Authorized
Lionel Service Station or contact Lionel Customer Service for repair.
Turning the smoke unit switch to the off position will disable diagnostic checks of
Note!
the smoke system.
Number of Blinks
1
2
3
Diagnostic Code Description
Main drive motor stalled.
Smoke 1 element problem.
Smoke 1 fan problem.
30