• Code: SC552
• Description: Pressure roller thermistor error 2
  After the main switch is turned on or the cover is closed, the heating roller temperature did not reach the ready temperature (45°C) within 80 sec. after the fusing lamp switches on. -or- If the fusing unit did not reach the reload temperature after 350 sec.
• Causes: • Pressure roller thermistor harness loose, disconnected, defective • Pressure roller thermistor defectives.

• Code: SC553
• Description: Pressure roller thermistor (software) error
  The thermistor detected a temperature over 220°C 12 times within 1 sec.
• Causes: • Do SP5810 to cancel the SC fusing code. • TRIAC short, AC drive board defective • VBCU defective

• Code: SC554
• Description: Pressure roller thermistor (hardware) error
  The thermistor detected a temperature over 230°C.
• Causes: • Do SP5810 to cancel the SC fusing code • TRIAC short, AC drive board defective • VBCU defective

• Code: SC555
• Description: Pressure roller fusing lamp remains on
  After hot roller reaches warm-up temperature, the pressure roller fusing lamp remained for 300 sec. while the hot roller is not rotating.
• Causes: • Do SP5810 to cancel the SC fusing code. • Thermistor damaged, or out of position • Fusing lamp disconnected, broken

• Code: SC556
• Description: Heating roller fusing lamp error
  After hot roller reaches warmup temperature, the heating roller fusing lamp (ends) remains for 10 sec. while the hot roller is not rotating.
• Causes: • Thermistor damaged, or out of position • Fusing lamp disconnected, broken

• Code: SC557
• Description: Zero Cross Over Error
  At power on the fusing relay was detected as defective.
• Causes: • Replace the AC drive board.

• Code: SC559
• Description: Three Successive Paper Jams in Fusing Unit
  This SC only occurs if SP1159 is on, and a jam occurred in the fusing unit for three consecutive sheets of paper. With SP1159 set to "1" the machine operation can be restored only by the service technician. The paper cooling job time sensor detected paper late for 3 counts.
• Causes: • Remove the paper that is jammed in the fusing unit. • Make sure that the fusing unit is clean and has no obstacles in the paper feed path.

• Code: SC561
• Description: Heating roller non-contact thermistor error 1
  The temperature measured by the heating roller thermistor (non-contact) on the end of the heating roller did not reach the prescribed warm-up temperature within 1 sec.
• Causes: • Loose, broken, damaged connector • Defective thermistor