Unit shuts down; control board beeps eight times repeatedly
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety First: Disconnect power before cleaning. Refrigerant work must be done by a certified technician.
- Clean condenser coil: Remove panels and thoroughly clean the condenser fins with a brush and vacuum. Ensure good airflow around the unit.
- Clean water system and evaporator: Run a full cleaning cycle with nickel-safe ice machine cleaner. Remove mineral deposits from the evaporator plate and water distribution tubes.
- Check ambient conditions: Verify the room temperature is within Hoshizaki’s specified range. Extremely high ambient temperatures can lengthen freeze times.
- Inspect condenser fan and water flow: Ensure the condenser fan runs properly (air-cooled) or that condenser water flow is adequate (water-cooled). Correct any issues.
- Reset and observe: After cleaning and corrections, reset the unit and time a freeze cycle. Compare to the service manual’s normal freeze time.
When to call a technician: If freeze times remain long after cleaning and airflow corrections, a sealed system problem (low charge, restriction, weak compressor) is likely and requires professional service.