• Code: 551
• Description: Pressure roller thermistor error
  The measured pressure roller temperature does not reach 7°C for 30 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 180 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 100 consecutive seconds.
• Causes: • Pressure roller thermistor out of position

• Code: 556
• Description: Pressure roller fusing lamp temperature fluctuation
  The pressure roller temperature changes by ±20°C or more in one second. This occurs three times in one minute or two consecutive times.
• Causes: • Loose connection of the pressure roller thermistor • Loose connection between the fusing unit and main frame

• 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: 570
• Description: Fusing oil end
  Fusing oil is running out.
• Causes: • Insufficient fusing oil

• Code: 571
• Description: Waste oil full
  Waste oil bottle is full.
• Causes: • Full waste oil bottle