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Why is Your Hoshizaki Ice Maker Beeping?

Picture - Why is Your Hoshizaki Ice Maker Beeping?

From restaurants and movie theaters to hospitals and schools, ice is vital to keeping any commercial kitchen running. Hoshizaki is one of the mainstays in making ice, manufacturing a wide variety of models that create different cubes or special shapes. So when you hear your Hoshizaki ice machine beeping, there certainly is reason to pause. But fear not! 

These machines have several audible beep patterns associated with specific issues, meaning you can easily identify the problem at a moment's notice. In certain cases, the problems are even easy to resolve on your own. Here are some common Hoshizaki ice machine troubleshooting tips.

Hoshizaki Ice Machine Troubleshooting

When your Hoshizaki ice machine is beeping, you’ll want to make sure you know how to diagnose the issue so you can repair it in no time. Here are beep meanings to help you out:

  • One Beep - High Temperature Safety Warning - These units have a built-in function that prevents the unit from damage due to excessively high temperatures. The ice maker will shut down when the thermistor hits 127 degrees Fahrenheit. This can be caused by hot water in the unit, a shorted thermistor, hot gas valve complication or a control board relay issue.
  • Two Beeps - Long Harvest Cycle - A machine's harvest cycle begins when ice is ejected from its ice mold. The control board has a defrost backup safety timer that protects from long harvesting. This alarm is warning you that that machine ran 20-minute harvest cycles, resulting in two beeps and an orange LED marked "20 min." This can be caused by thermostatic expansion valve leaks, an open thermistor, an unopened HGV or a compressor defect.
  • Three Beeps - Long Freeze Cycle - An ice maker's freeze cycle begins after water is filled in the ice mold and ends when the water is frozen. The control board will shut down if, consecutively, the float switch doesn't open to begin the harvest cycle in 60 minutes. A yellow LED will light up with "60 min," kicking in the freeze backup timer. This can be caused by a closed float switch (up position), HGV leaking, open or leaking water inlet valve, low charge or a compressor defect.
  • Four or Five Beeps - Circuit Issues on Mechanical Bin Sensor - This issue exists on older Hoshizaki models featuring a mechanical bin control. The four-beep alarm sounds when the bin control's K-4 connector has a short circuit. If five beeps occur, then the bin control's K-4 connector has an open circuit. These beeps are heard on KM-280, KM-500, KM-630 and KM-900 models.
  • Six or Seven Beeps - Incorrect Voltage Supply - When voltage dips below 92 volts +/- 5 percent, the unit will sound a six-beep alarm and the control board will automatically shut down. The machine will restart once the correct voltage is restored. When voltage exceeds 147 volts +/- 5 percent, a seven-beep alarm will sound and shut down the unit.
  • Eight Beeps - De-Energized Gear Motor Relay - The compressor relay won't energize, forcing the machine to shut down both the compressor and gear motor relays. Turning the unit on and off will manually reset the issue.
  • Nine Beeps - Bin Control Check - This alarm will sound at the risk of an overfilling ice storage bin. When the mechanical bin control indicates that the storage bin is full, the proximity switch opens and the control board shuts down the machine. Turning the machine on and off will manually reset the problem.

Hoshizaki Ice Machine Reset

The Hoshizaki ice machine reset button is typically located on the ice maker's control board next to a yellow and orange light. With the power on, press the button while the board is beeping. The machine should begin the startup process.

Check out Parts Town's large selection of Hoshizaki ice maker manuals and parts lists to help you identify any additional problems, learn about the Hoshizaki ice machine control board location or troubleshooting tips.

Please contact a local authorized service agent who can help with this specific unit and all your commercial kitchen equipment needs.