I have a Hoshizaki AM-50BAE and it suddenly stopped making ice and all the ice melted away. Can it be fixed? What might be wrong?

If you want the ice maker work. you will to pay for the repair, If you want you cam another company.. Or you can do nothing which is nothing

The machine, all in one, not indoor/outdoor split type, will make beeping sound when something is wrong and stops working until it is turned off and turned back on. Some times the machine needs to be reset with the power on, covers removed, reset button inside on electronic mother board.
The ice machine covers have instructions and information on beeping sounds.

You have a relay or starter going bad. It definitely needs servicing. I am assuming you have called tech. I would turn it off until you get it fixed even if it is still making ice. This may indicate something is seriously wrong or about ready to shut down.

hoshizaki ice maker kml 400 mae is not making enough ice after i cleaned it.

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.

just to let you know you need to use nickel safe ice machine cleaner. and i hate to tell you this but if you are seeing silver chips in your ice your evaporator is shot. even if it is under warranty they will not give a new plate just for the reason of not using nickel safe cleaner. hope this helps you. i have seen this many times as im a service tech. alot of restaurant owners use coffee cleaner and also destroy their plates

make a few quick checks. If there are water filters on the system, be sure they are not restricked. Could be clogged. Next, check the bin stat. It usually is mounted in the ice bin. If it breaks or goes bad, it shuts down the machine. Start there and let me know if I can be of any further help.

Change the float.

Bin Thermostat does not work

Remove the cover where the persons finger is and check to make sure that it is not covered with ice. Sounds like your machine iced oup and you will need to clean the coils and possibly replace the thermostat