• Code: 554
• Description: Heating roller overheat (hardware error)
  The heating roller thermistor detects 240°C or more.
• Causes: • Defective PSU • Defective IOB • Defective EGB • Defective fusing control system
• Remedy: 1. Replace the PSU. 2. Replace the IOB. 3. Replace the BCU.

• Code: 557
• Description: Zero cross frequency error
  When the zero cross signal is 66 or more and it is detected 10 times or more in 11 detections, the machine determines that input 60 Hz and SC557 occurs.
• Causes: • Noise (High frequency)
• Remedy: 1. Check the power supply source. 2. Replace the PSU.

• Code: 559
• Description: Consecutive fusing jam
  The paper jam counter for the fusing unit reaches 3 times. The paper jam counter is cleared if the paper is fed correctly. This SC is activated only when SP1159-001 is set to "1" (default "0").
• Causes: • Paper jam in the fusing unit.
• Remedy: Remove the paper that is jammed in the fusing unit. Then make sure that the fusing unit is clean and has no obstacles in the paper feed path.

• Code: 561
• Description: Pressure roller thermistor error
  The temperature measured by the thermistor does not reach 0 °C for 37 seconds.
• Causes: • Loose connection of the pressure roller thermistor • Defective pressure roller thermistor
• Remedy: 1. Check if the pressure roller thermistor is firmly connected. 2. Replace the pressure roller thermistor.

• Code: 562
• Description: Pressure roller temperature error
  The temperature of the pressure roller does not reach the ready temperature for 120 seconds after the fusing lamp has turned on.
• Causes: • Defective pressure roller thermistor • Defective fusing lamp
• Remedy: 1. Clean the thermopile. 2. Replace the thermistor for the pressure roller. 3. Replace the pressure roller fusing lamp.

• Code: 563
• Description: Pressure roller overheat 3 (software error)
  The detected pressure roller temperature stays at 215°C or more for 1 second.
• Causes: • Defective PSU • Defective IOB • Defective EGB
• Remedy: 1. Replace the PSU. 2. Replace the IOB. 3. Replace the BCU.

• Code: 564
• Description: Pressure roller overheat 3 (hardware error)
  The thermistor detects 220°C or more.
• Causes: • Defective PSU • Defective IOB • Defective EGB • Defective fusing control system
• Remedy: 1. Replace the PSU. 2. Replace the IOB. 3. Replace the BCU.

• Code: 565
• Description: Pressure roller fusing lamp consecutive full power 3
  When the fusing unit is not running in the ready condition, the pressure roller fusing lamp keeps ON full power for 180 seconds or more.
• Causes: • Broken pressure roller fusing lamp
• Remedy: 1. Replace the pressure roller fusing lamp. 2. Replace the pressure roller thermistor. 3. Replace the PSU.