Water not coming to the ice machine - Hoshizaki Commercial Freezer KM-500MAH

time the cycle. if it is only running about 5 minutes and going into harvest, look for sump loosing water. Look at where the unit drains (like a floor drain) while the unit is running to see how much, if any water is draining. does not take much to make an early harvest. also, sump may not be filling up completely but with just enough water to satisfy the float.

90% of ice maker problems are water related. Sounds like water may be continually seeping in from the inlet water valve (normal thing to do if the water level is low). This will not allow the water to get down to freezing temperature. You have to identify the reason that water is constantly running in. It's probably "leaking" out at the dump valve. Or does that unit have a float valve that may be leaking. Check your drain to see if water is leaking out during the freeze cycle.

put switch into the "wash" mode. if water pump comes on, replace the switch.

I am not sure about the commercial ice, but I would check to make sure the water tube that goes into the maker does not have an air bubble in it. That can cause the water not to come into the freezer to make the ice cubes.

Change the float (water level)

check the bottom of the bin for a drain spout. The drain line may be clogged allowing the water to build-up in the bottom.

If the water is coming down from the ice machine itself, you will need to open up the machine and look inside. Check to ensure the cube guides have not come out of place, that the sump is not overflowing with water, and that there are no loose, leaking, disconnected, or busted hoses.

There is a drain the back of the freezer that is frozen. Your trickle of water comes from the ice that melts off of the refrigeration coils during the defrost cycle. You need to turn off the freezer, then remove the rear cover from the back wall to expose the coils. With a hair dryer, melt all of the ice. You will find a drain under the coils. Melts all of the ice in this drain so water can get out of the freezer. When this drain is clear, you can put everything back together, and your freezer should work normally.

If you did the wash cycle per the manufacturer instructions, you may have forgotten to turn the directional water valve back. It directs the water/cleaning solution to go inbetween the plates. It has a micro switch that will not let the compressor come on. If you did turn it back, the switch may be bad.
Check it out.

Hi, I have worked on these machines many times, air and water cooled. Do you have a code chart on a panel to tell you what the 2 beeps are on the control board? Do you have the original troubleshooting manual? This would be of a lot of help. This KM900 is a good size ice machine. I would pick up a gallon of nickle safe ice machine cleaner at a refrigeration parts house, read the instructions and run the machine through the cleaning cycle again. Hand clean everything you can get to again, this is the biggest problem I find on water cooled units. The nickel safe is an excellent cleaner made for this problem. Do you have a water softener for the inlet water on this machine? If not I would recommend having one installed. This will cut down on a lot of problems you will have in the future. Try this and get back to me and let me know. In the mean time I will research this ice machine to see what I can come up with.
Shastalaker7

Check the water filters first. Then check the condenser coils for dust and dirt. Determine which way the air goes thru the condenser coils and check on the side the air goes into. There are coil cleaning sprays that work good. If it is still slow, it may need gas. That will require a service call from a technician.