• Code: 545
• Description: Heating roller fusing lamp consecutive full power
  When the fusing unit is not running in the Ready condition, the heating roller fusing lamp keeps on with full power for 35 consecutive seconds.
• Causes: • Heating roller thermistor out of position

• Code: 551
• Description: Pressure roller thermistor error
  The measured pressure roller temperature does not reach 7°C for 60 seconds.
• Causes: • Loose connection of pressure roller thermistor • Defective pressure roller thermistor • Defective BCU

• Code: 552
• Description: Pressure roller warm-up error
  After the main switch is turned on or the door is closed, the pressure roller temperature does not reach the ready temperature within 210 seconds during fusing unit warm-up.
• Causes: • Pressure roller fusing lamp broken • Defective pressure roller thermistor • Defective BCU

• Code: 553
• Description: Pressure roller fusing lamp overheat
  The detected pressure roller temperature stays at 210°C or more for five seconds.
• Causes: • Defective PSU • Defective BCU

• Code: 555
• Description: Pressure roller fusing lamp consecutive full power
  When the fusing unit is not running in the Ready condition, the pressure roller-fusing lamp keeps ON with full power for 300 consecutive seconds.
• Causes: • Pressure roller thermistor out of position

• Code: 560
• Description: Zero cross error
  When the main switch is turned on, the machine checks how many zero-cross signals are generated during 500 ms. If the number of zero-cross signal generated is either more than 66 or less than 45 and when this condition is detected 10 consecutive times, this code is displayed.
• Causes: • Electrical noise in the supply from the power cord

• Code: 620
• Description: ARDF communication error
  • After the ARDF is detected, the break signal occurs or communication timeout occurs.
• Causes: • Incorrect installation of ARDF • ARDF defective • IPU board defective • External noise

• Code: 621
• Description: Two-tray finisher/booklet finisher communication error
• Causes: • Cable problems • BCU problems • PSU problems in the machine • Main board problems in the peripherals