What conditions can cause a decoder to fail?
• Overvoltage on input (from track) • Current draw exceeds decoder ratings (wiring short or other overload condition) • Be carefull when first testing a decoder installation. Put the DCC device on a test track (programming track or section with a 100-ohm series resistor) instead of the main line for testing. If all functions work, and it can move (assuming motor output drive from decoder) at low speed steps, then you should be relatively safe to place it on the main. As always, follow the manufacturer’s instructions for testing in addition to the above. • Overheating • Imagine running a black loco in direct sunlight and hauling a heavy load at nearly the limit of the current output of the decoder. Now imagine the decoder only having current limits, and not thermal limits built in. The scenario can also happen if the decoder is installed in an area with little air space. Consider the heat is the only suggestion so far…
