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Re: Ice machines compressor runs extremely hot.
This looks to be a Scottsman Ice machine so could be that your condenser fan motor isn't running or you need to clean the condenser which either of these could cause the compressor to be extremely hot. If it is over producing ice then you could try to turn down the bin level. If this doesn't fix your problem with over production then you may need to replace the bin level thermostat which can be located at the bottom of the machine. It is the one that has the knob on it. The other thermostat behind the control cover is the cube size control which routes to the back, top of the machine. The bin level control routes around under the bottom between the compressor and the case, then up and into the back of the cabinet. The silver colored scoop holder inside the machine to the right is where the bin level thermostat registers it's temperatures. It's not just a scoop holder. Let me know if you need more help. Thanks.
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Hi, first make sure the switch is not in the clean position but to on. If it is in the on position and the water is circulating over evaporator plate and is running back into the water sump tray and compressor is running as you stated then check to make sure the hot gas valve is not letting hot gas leak through during freeze cycle, the way you can check is after start up wait about 5 minutes and check the temp entering the hot gas valve and the temp on the other side of the valve if temp is the same then valve is bad. The next thing to check is the refrigerant level this only can be done by adding service valves and weighing out the charge to see if it is low, if low then there is a leak. The freeze cycle is as follows. The compressor, fan motor and water pump are all operating and stay in a freeze cycle until the evaporator thermistor reaches 6.5 deg F. That signals the control board to place the unit into a harvest cycle.
Why would you wont to change the freon? It would cost more to convert one freon over to another than you could buy another ice maker for. You cant just change freon over from one type to another. You would have to change the compressor, the TXV, all dryers, Make sure you have removed all the oil from the system that is trapped. Now if it is low and you are wanting to charge it back up then you need to find the leak and repair it first.Refrigerants do not deplete them selves so if it is low than you either have a leek or if you keep putting gauges on it then you loose some charge every time you do this. So if you have no experience with a refrigerant system i would call a service company.
Is the machine producing ice thick enough to come off the evaporator plate? the machine will try to harvest 3 times before it locks out on long harvest. Harvest cycle: The compressor and hot gas valve are both powered during the harvest cycle. The fan and pump are off at this time. The machine stays in the harvest cycle until the evaporator thermistor senses 52 DEG F. If the bin is not full, the unit goes into another freeze cycle. I would check the Thermistor
There are a couple of things to check. The machine must be level. You can remove the front cover and the plastic sheet that covers the plate where the ice is made. Check to see that the water is flowing from the manifold at the top of the plate. You may have to pop the hose off the end of that manifold to clean the water holes out. It must flow evenly over the plate. Probably the most common problem is the radiator coil there the fan draws air through is clogged up so that it can't dissapate heat properly. You should be able to feel a lot of hot air moving through the coils. The fan cycles on and off periodically to maintain a certain pressure in the freon. That is normal. Clean the fan coils and level the machine.
Problem too long ice production
CHECK THE FOLLOWING:
check the refrigerant charge
check the hot gas solinoid valve
compression test the compressor
check the ambient and water temp.
check the condenser fan motor and condenser coil
check the txv and sensing bulb if in proper location
Which motor is hot...compressor or fan?
Also need to know the model number.
Is this a 3-phase or single-phase unit?
Let's assume it is the compressor...Is it so hot that you can't touch it for more than a second or two? Is the compressor shutting down on internal thermal overload?
Compressor body hot can be caused by a number of things:
1. Low charge (the freon acts as a coolant for the compressor).
2. Electrical imbalance (3-phase only). (check line-to-line voltages)
3. Bearings in compressor failing (check amp draw).
4. Condenser dirty or airflow blocked in some way.
5. Condenser fan(s) not running or running backwards.
6. If water cooled condenser then water flow problem.
Hope this helps you get started.
If this helps you, please select YES to the first two ratings questions. Thank you, and Good Luck.
Your unit will only harvest when your thermostat is satisfied. If you have heavy frost you need to defrost the unit. If no frost then make sure the fan is running by the compressor. If the fan isnt running then the compressor is going off on overload. Or it could be the fan running but the compressor is not. If thats the case you will need a service tech.
if the ice production is slow first try to set it on a warmer temperature. Now if its frosted up then you will need to defrost it. Also check the fan to see if its running. if yes is the condensor clean? If yes then check temperature in bucket. 10 to 15 degrees is ideal for this model.