IR Sensors Flashing

[Thing2_1723]

We got our sensors calibrated earlier today and after we had it off for a while, we turned it on and two of the sensors were flashing both yellow and orange. On the instructions for them it said that is the if the yellow one was flashing it was a DC model and if the orange one was flashing it was an AC model. However there was nothing about both flashing.

We have tried reconnecting the wires and turning it on and off, too. Has anyone else had this problem and been able to fix it or be able to lead us in the right direction of where we can find out how to fix this dilemma.