I ran into my first Indigo (M#IY0606A) ice machine service call and I can't find the answer to my question regarding the ITP (Ice Thickness Probe) light on the control board. We know that on the Q & S models that the ITP will make the red light (Harvest light) flicker whenever water touches the ITP and it will initiate the harvest cycle when the harvest light stays on for 10 consecutive seconds. However, that is not what the Indigo ice machine control board’s ITP light does. My questions, which I can’t find in the 270 page Technician's Manual is: When should the ITP light on the control board be on, when should it be off and should it flicker when water splashes on to it? Thanks for any info regarding how the ITP light on the control board works.