Need to clean an ice machine

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.

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.

Might need to clean float switch, or water inlet valve bypassing water. Deep clean Hoshizaki.

check the fuse

I am assuming that it has run two consecutive cycles. I would first clean the machine inside and out. it should drop ice once cleaned, if not then open up the control box and find out which lights are flashing. I am almost certain that once it is cleaned it will drop ice.

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

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

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

Most likely(50% of the times) Your Ice machine need a real cleaning. not just run clean cycle with ice machine cleaner. every 6 month call HVAC-R guys - machine will last half time longer if u schedule proper maintenance with them. I have seen It all: people try to call "friend", or someone who "knows" how this machines work. Real clean would take up to 3 hours for people who know what they doing. Here is one of my videos, when 3 beeps - long freeze cycle is not common and all others would offer You to get a new Ice Machine. Bill to the owner was 950$, New Machine 3450$ plus labour to install 600$.

Update on the above! The water does shut off, but when the water is running it runs and splashes for awhile down all over the ice thats in there. Water bill is very high when it is in use.