the red light on infrared sensor, which means it is sensing something, (i.e. the bed) stays on 24/7 and wont turn off even if the bed is all the way down. ive followed directions exactly. when I auto home the x and y move accordingly but the bed moves down 5 mm (im still in the commissioning stage where we set the z offset to -5). it appears to be falsely sensing something but nothing will turn it off.