c-5351bizhub C250i

Fix bizhub C250i Error C-5351: Troubleshooting

The Konica Minolta bizhub C250i error C-5351 indicates a communication fault with the fuser cooling fan. Why does my bizhub C250i show error C-5351? Typically, it is caused by internal obstruction or a seized fan bearing. The device stops operating to protect the fuser unit from potential heat buildup.

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Common causes

  • 1Fan motor seized due to old age or dirt.
  • 2Clogged air filters causing thermal load.
  • 3Control board sensor failure.
  • 4Foreign object in the fuser path.

Solutions

Diagnóstico rápido

C-5351 is a fuser cooling alarm. If the fan fails to reach speed or fails to send an RPM signal, the device enters a hard error state.

Solución paso a paso

  1. Power cycle: Use the main switch to shut down.
  2. Obstruction check: Check the rear vent for dust or paper objects.
  3. Inspection: Gently rotate the fan blades if accessible.
  4. Restart: Power on to test functionality.

Prevención y mantenimiento

Monthly vacuum cleaning of the air vents prevents buildup. Keep the printer away from walls to ensure airflow.

Cuándo llamar a un técnico

If the fan remains motionless, the motor is likely faulty and requires expert replacement.

Ficha técnica del equipo

  • Technology: Color Laser MFP
  • Speed: 25 ppm
  • Connectivity: LAN, USB
  • Capacity: 1,150 sheets standard
  • Compatible supplies: TNP-79 Toner
  • Recommended usage: Corporate Office
  • Drivers / official firmware

Steps to follow

  1. 1

    Power off

    Turn the main power switch off for 10 minutes.

  2. 2

    Fan inspection

    Clear any debris or blockages from the rear air vents.

  3. 3

    Restart

    Power on and verify the fuser fan operation.

Frequently asked questions

This code points to a malfunction in the fuser cooling fan motor.

No, it shuts down to prevent heat damage to the fuser.

Uses TNP-79 series toner.

Ensure adequate space around the rear vents for airflow.