I need to disconnect and move my machine , hoshizaki model #km-500mwf .

Is it making ice? Frost on this line is not that uncommon as it is colder than the air around it. Make sure you have good water flow over the evap plates. machine may just need a good chemical cleaning.

You can download it @ www.hoshizaki.com

3 beeps means it has been in the freeze cycle too long. A stuck float switch can cause this as well as a leaking water valve. Look for that first. Let me know if you need more info.

http://www.hoshizakiamerica.com/manuals/KM-900M_F_inst.pdf
This is the manual for your machine. Check out the pages that have examples of the nameplate information. It shows that the machine is approved for UL and NSF. Otherwise, I would suggest contacting Hoshizaki directly.

http://www.hoshizakiamerica.com/manuals/KM-630M_E_serv.pdf
Go to this site. Has manual for several different units with your partial model number.

Rick at Restaurant Parts and More can get Hoshi parts. Just have model and serial numbers. He takes credit cards. Usually can it parts in about 3 days to your door.

http://www.hoshizakiamerica.com/manuals/KM-500M_F_serv.pdf

This should take you right to the manual on their web site.
Hope this helps you.

Hoshizaki machines have a water inlet valve that can stick in the open position. This will cause the machine to do silly things. If you can turn the machine off and you can still hear water running, the valve is stuck open. It is an easy fix. Water valve only has 2 wires going to it and 2 water lines. One inlet and one outlet. Just turn off water and kill power at the breaker before doing any work.

Hope this helps and good luck.

Try Rick and Restaurant Parts and More in Ohio for a replacement valve. 1-888-814-1110

km-450mwb hoshizaki problem is machine strate is ok but to long time ice making , not dropping, two beeps every three seconds what problem i don't no pleas help mi