Vieira MCO hammer mill troubleshooting

Before any check, switch the mill off and wait for the rotor to stop completely. Never open the grinding box door while the mill is running.

The motor hums but does not turn

• Likely cause: wrong motor electrical connection or a problem with the mains voltage.
• What to do: ask an electrician to check the electrical connection and the mains voltage.

Output has dropped or is below normal

• Likely cause: worn or clogged screen; blockage in the product path.
• What to do: replace the worn screen or unclog it; check and clean the mill.

Metallic clicking inside the mill

• Likely cause: a foreign object (metal, stone, etc.) inside the grinding box; screen poorly seated in the frame.
• What to do: switch the mill off as soon as possible, wait for it to stop and remove the foreign object; check the fit of the screen in the frame (fitting the screen).

Excessive vibration

• Likely cause: rotor imbalance.
• What to do: the rotor balance needs to be checked: contact technical assistance.

Product leaking from the door

• Likely cause: worn door sealing rubber.
• What to do: replace the rubber (replacing the door seal).

The product particle size has changed

• Likely cause: damaged screen; screen or frame poorly seated in the guide hole of the grinding box.
• What to do: replace the damaged screen; check the fit of the screen and the frame.

The mill does not switch off when the door is opened

• Likely cause: faulty shut-off sensor or altered sensor wiring.
• What to do: switch the mill off, do not use it again and call technical assistance to check or replace the sensor.