What does Hoshizaki ice machine error E2 mean?

E2 on Hoshizaki KM series ice machines indicates a long harvest cycle — the harvest cycle has exceeded the maximum time limit (typically 3 minutes 20 seconds). Check: hot gas valve operation (should open fully on harvest command), refrigerant charge (low charge slows harvest), water distribution tube for even water flow across the evaporator, and freezing temperature setpoint.

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.

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Common Hoshizaki Error Codes

Long freeze cycle — check refrigerant and water supply

Long harvest cycle — check hot gas valve and refrigerant

Water level sensor fault — check float switch and water supply

High condenser temperature — clean condenser

Frequently Asked Questions — Hoshizaki

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