Top 20 Hoshizaki Commercial Freezer KM-500MAH Questions & Answers

float switch is not repairable, You need to replace it. Might be just clogged.

You might need to deep clean Your machine. Might be float switch clogged.

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.

KM says this is an ice maker. Reset button is on the control board. Board is in compartment on the right side where the power switch is located. Remove 2 screws and remove cover by sliding forward. Watch for wires, do this carefully. On the board, up at the top, is a small, white button. With power on, push the button.

if your are referring to a harvest cycle not clearing the plates, there may not be enough heat to clear the plates or the defrost cycle is too short. Usually the first thing to check. start there my friend.

If you are referring to the ice not clearing the evaporator plates, usually the defrost cycle is too short. Check that by watching the machine and when it goes into the harvest mode, see if all the ice comes off. If not, lengthen the cycle.

Check your "Bin Stat" first as most all machine have power sent to the control board via this control. Start there.

signal means freeze cycle is longer than 60 minutes. Look for: stuck float, water valve leaking water into the sump, Hot Gas Valve leaking hot gas into the cold side of the refrigeration system. Start there.

signal means freeze cycle is over 60 minutes. Look for: stuck float, water valve leaking water into sump, hot gas valve leaking hot gas into the cool side of the refrigeration system. start there.

This is a "defrost too long" code. Look for bad thermistor or low refrigerant charge first as these are the easiest and most likely place to start.

check the float switch to see if it needs cleaning, it may be stuck.

really sounds like the board needs replacing. after 1 minute, if the float is doing it's job, the compressor is to come on provided the water level is correct and the float is doing what it was designed to do.

stuck hot gas valve or relay, hot water entering unit, bad headmaster. continue your checks.

here is a link to the service manual. http://www.hoshizakiamerica.com/manuals/KM-500M_H_serv.pdf

Most likely bin Thermostat. But check if power correct to the unit

Video Ice machine repair


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