c5351bizhub C3351

Konica Minolta bizhub C3351 error c5351: Cooling fan failure

The Konica Minolta bizhub C3351 error c5351 is a system alert flagging a malfunction in one of the cooling fans. The device monitors the speed of each fan, and if a fan does not meet the specified RPM (revolutions per minute) or stalls completely, the machine triggers this error to protect its internal logic boards from thermal failure. Resolving the c5351 error involves checking for physical obstructions and cleaning dust from the airflow system.

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Common causes

  • 1Physical obstruction by dust accumulated in the fan blades.
  • 2Motor bearing seizure causing increased friction.
  • 3Faulty tachometer signal from the cooling fan circuit.
  • 4Power supply failure for auxiliary cooling systems.

Solutions

Quick Diagnosis

If you see the c5351 code, check the rear of the device for any blockage or signs of heavy dust accumulation. If the machine seems unusually hot to the touch, the fan is definitely failing to move air effectively.

Step-by-step Solution

  1. Check obstructions: Ensure that the air vents are not blocked by external objects or heavy dust.
  2. Cool-down cycle: Power off for at least 5 minutes to allow electronic components to cool down.
  3. Listen for airflow: Verify if you can hear the fan spinning when powering up the unit.
  4. External cleaning: Carefully blow compressed air through the vent grills.

Prevention and Maintenance

Maintain at least 20 cm of clearance around the printer for proper heat dissipation. Cleaning intake filters every three months is essential for extending the life of the cooling motors.

When to call a technician

If the error persists after a thorough cleaning and power cycle, the motor inside the cooling fan is mechanically faulty and must be replaced by a professional.

Ficha técnica del equipo

  • Technology: Color Laser Multifunctional
  • Speed/Performance: 33 ppm
  • Connectivity: Gigabit LAN, USB 2.0
  • Input capacity: 650 sheets standard
  • Compatible consumable: Air intake filter (bizhub C3351)
  • Recommended usage: Office environments
  • Official drivers / firmware

Steps to follow

  1. 1

    Check obstructions

    Ensure that the air vents are not blocked by external objects or heavy dust.

  2. 2

    Cool-down cycle

    Power off for at least 5 minutes to allow electronic components to cool down.

  3. 3

    Listen for airflow

    Verify if you can hear the fan spinning when powering up the unit.

  4. 4

    External cleaning

    Carefully blow compressed air through the vent grills.

Frequently asked questions

The error c5351 indicates that a cooling fan has reported an abnormal rotation speed, potentially due to a motor failure or debris blockage.

No, persistent cooling failures can lead to high-heat conditions that damage sensitive internal circuitry.

Fans are not typically consumables, but clogged intake filters increase motor load, leading to failure.

Clean external vent filters monthly and maintain a 20 cm distance from all walls to allow for proper heat dissipation.