• Code: 553
• Description: Overheat error (pressure roller)
  The pressure roller thermistor detects 165°C for 5 seconds.
• Causes: • Loose connection • Defective BICU board • Defective PSU

• Code: 554
• Description: Low temperature error (pressure roller)
  During standby or operation, the pressure roller thermistor detects 60°C or less for 5 seconds.
• Causes: • Defective lamp (loose connection, thermostat failure, PSU, thermostat) • Incorrect detection (thermistor loose connection, fusing - drawer loose connection)

• Code: 555
• Description: Full power error (pressure roller)
  Fusing unit warm-up is complete.→ The fusing pressure roller stops turning. → The pressure roller lamp keeps outputting the maximum power for 200 seconds.
• Causes: • Thermistor loose connection • Fusing - drawer loose connection

• Code: 556
• Description: Unstable temperature (pressure roller)
  The pressure roller thermistor detects unstable temperature increases or decreases within 60 seconds.
• Causes: • Thermistor loose connection • Fusing - drawer loose connection

• Code: 560
• Description: Zero cross error
  The main switch is turned on; the fusing relay turns on. → 50 Hz or 60 Hz is not detected within 5 seconds.
• Causes: • Defective PSU • Incorrect power supply

• Code: 570
• Description: Fusing oil end
  500 sheets of paper have been output since oil end was detected.
• Causes: • Insufficient oil (the oil tank in the rear of the machine) • Defective oil pipe • Defective oil pump • Defective oil end sensor

• Code: 571
• Description: Fusing oil overflow
  • The oil overflow sensor detects oil. • When the machine covers are closed, the oil supply unit is not detected. • When the machine covers are closed, the fusing unit is not detected.
• Causes: • Defective oil end sensor • Defective oil overflow sensor • Defective sensor cable • Oil supply unit not installed

• Code: 620
• Description: ADF communication error
  The ADF has been detected. → A communication error has occurred.
• Causes: • Loose connection • Defective ADF • Defective BICU board • Defective scanner I/O board • External noise