Called out earlier today on a Manitowoc QDO450 ,, No Ice.
I initially saw that they had switiched it over to clean before turning it off.. So I had to wait for that finsish up first, meantime I looked the unit over everything seemed fine.
Finally after clean cycle finished, it went into "Make" and I didnt notice it right away but the harvest red light was on. I noticed it after it went into harvest after 6 minutes,, (after reading the tech book, this is what it was supposed to do.) the six minutes not the red harvest light.
So then I started messing with the Ice thickness probe. the red light was on. I Acutally removed the probe from the evap and still on. , It only went off after I unpluged the probe wire from the control board.
Here is where it gets weird.
I put an aligator clip to the control board where the probe was pluged in.. Light off...
1. Touched the end to the water: Light on =okay
2.Touched to unit ground: Light on= okay
3. touched with my finger:, Light on= weird
4. touched to the completly isolataed and unistalled ice probe not touching any metal: Light on= Very Weird.
5. Touched to a Brand new Probe I had on truck still in plastic wrap. : Light on = very very weird.
oh yeah I even uplugged power thinking the board needed a reset. no differance.
There I was, just lost, and tech support was closed. So I just left it unplugged and let it make ice for a while till I felt it was time for a harvest. Bout 15 mins. I plugged the probe back in the light came on and it harvested.
then the very next cycle It was back to normal, and the four after that, so I just tip toed away. but I have the feeling that I will be back soon.
anybody have any tips or ideas. I told the owner my findings and if it goes out again just leave it alone till I get there. and perhaps I may find something like a flash code or something.
I appreciate any help guys.