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Manitowoc Indigo curtain stays open too long and triggers bin full.
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You have a single evaporator, TXV, and harvest valve. The same controller is used across the whole line. The thermistors are as follows on your machine; T1 is the liquid line out of the condenser. T2 is the compressor discharge. T3 is the evaporator inlet temp. T4 is the evaporator outlet. On other models these probes are placed and programmed different. If you had a bad thermistor, you would have a alarm indicating it. They are easily tested with a ohm meter. Values are in a chart in the service manual.
At the start of the freeze cycle T3 should be about 23F and drop slowly as the ice forms to about -9F. Suction pressure is a better indicator. During Harvest, T2 (compressor) should start about 87F and drop to 65F. Again, gauges are a better indicator. Remember, that when the harvest valve opens, it drops most of the load on the compressor. Discharge just is vapor going through the evaporator. If you watch T4 during the harvest you will see it go from freezing to about 40 to 50 degrees before the ice drops. You should not see the compressor discharge above 150 in any part of the cycle. If you do, (providing the fan is working correctly) look for line damage between the compressor and condenser. Or Check valve is not opening correctly. It’s between the harvest valve and the condenser to prevent back feed of liquid during the harvest. But that would shorten the harvest time. Not increase it. Get a good accurate thermometer and a ohm meter and test any suspect thermistors before getting in to deep.
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Hello there, this is Jonathan at Manitowoc Ice Service department. I would highly suggest a call to tech support at this point. Especially seeing as the warranty on this machine runs out 3/12/21 (Tomorrow)! Call 1-844-724-CARE
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Nice of you to jump in Icemanjon. Let us know what comes out of this.
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The issue I was having is fixed. Cleaning the grid with toothbrush and ice cleaner solution seems to have fixed the issue. Thank you guys for your help.
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Two questions, Did you use Manitowoc cleaner? And was it ever cleaned with a generic ice machine cleaner or another acid. What happens is the evaporator can get etched if the cleaner is wrong. Microscopic pitting.
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