Which track pads? Some don't accommodate the sensors or one could have come loose without dangling so you could see it. While annoying you're pads being new (?) are fine. Try pulling off the wheels and see if you can find a loose sensor. Some people that frequently change pads or know enough about their wear rates just clip the sensors and splice the wires together to eliminate the warnings. Or you can temporarily zip tie them out of the way and live with the warning.
Here is a thread showing how to disable them if you choose to do so:
http://www.m3post.com/forums/showthread.php?t=319185