What does Hoshizaki EE mean?

On Hoshizaki KM-series crescent cubers, EE is a composite error display that appears when the controller detects any fault other than the primary E1 or E2 backup-timer conditions.

What does Hoshizaki E1 mean?

E1 on Hoshizaki crescent-cuber ice machines, including the RH1-SSB and KM series, indicates the freeze-cycle backup timer has expired. Forty-five minutes after the water tank closes at the end of harvest, the controller checks the evaporator temperature.

How do I access the Hoshizaki diagnostic LED codes on a KM series machine?

Hoshizaki KM series machines have diagnostic LEDs on the control board inside the machine. Open the front access panel (power-safe access only) and observe the LED pattern. A solid LED for D1 indicates freeze cycle; flashing D1 indicates the freeze cycle has exceeded maximum time. Download the Hoshizaki service manual for your model's specific LED code table.

What causes a Hoshizaki ice machine to produce hollow ice cubes?

Hollow or incomplete ice cubes from Hoshizaki machines indicate insufficient freeze time or water distribution problems. Possible causes: low refrigerant charge (not freezing completely), water distribution tube holes partially blocked with mineral scale (clean with Hoshizaki descaler), or low water pressure causing uneven distribution. Run the machine through one full cycle and inspect the ice as it harvests.

What does Hoshizaki ice machine code E1 mean?

E1 indicates the freeze-cycle backup timer expired — forty-five minutes after the water tank closed at end of harvest, the controller checked the evaporator and it was still above 32 °F. The machine latched off and waits for a manual RESET. The most common root cause on air-cooled KM units is a dirty condenser starving the freeze; a leaky hot gas valve, low refrigerant charge, or a weeping inlet water valve all produce the same symptom.

What does "Code 2" mean on a Hoshizaki ice machine?

"Code 2" is technician shorthand for the E2 long-harvest fault on KM crescent cubers. The harvest cycle ran past its maximum time limit and the controller halted the machine. Check the hot gas valve (should be hot to the touch during harvest), the cube-thickness probe and water level on the evaporator, the inlet water valve flow rate, and the slush-bin thermistor. Clear the latched fault by pressing RESET on the control board after the repair.

What are Hoshizaki beep codes?

On KM crescent cubers, the controller chirps the on-board buzzer in groups that mirror the displayed digits — two beeps for E2, three beeps for E3, etc. — so a technician can identify the fault from outside the cabinet without opening the front panel. Newer DCM nugget-ice machines use a different scheme with continuous-beep alerts for water-supply / bin-full conditions and short-beep groups for freeze and harvest faults; consult the model-specific service manual for the exact mapping.

Quick Answer

Hoshizaki KM crescent-cuber ice machines use a numeric/alphanumeric scheme: E1 long-freeze backup, E2 long-harvest, E3/E4 water-tank actuator, E5 high evaporator, E9/EC thermistor, EA control board, Ed water-regulating valve, plus EE composite (press SERVICE 1 for the sub-code). Newer Hoshizaki refrigerators add F1–F5 thermistor and condenser codes. Press RESET after the repair.

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By Nichita Herput

Co-founder & CEO · Reviewed May 2026

What error codes does Hoshizaki display?

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