• Code: SC533
• Description: Fan error 4: fusing exhaust fan
  The lock signal remained HIGH for 5 sec. while the fan that draws air out of the fusing unit was operating.
• Causes: • Motor overload due to obstacle interfering with operation of the fan • Fan harness loose, disconnected, defective • Fan defective

• Code: SC534
• Description: Fan error 5: duplex exhaust fan
  The lock signal remained HIGH for 5 sec. while the fan that draws air out of the duplex unit was operating.
• Causes: • Motor overload due to obstacle interfering with operation of the fan • Fan harness loose, disconnected, defective • Fan defective

• Code: SC541
• Description: Heating roller thermistor 1 error 1: Poor connection
  The temperature measured by the heating roller thermistor does not reach 130°C after 10 tries and 65 sec. have elapsed.
• Causes: • Heating roller thermistor harness connection loose, disconnected, defective • Defective heating roller thermistor

• Code: SC542
• Description: Heating roller thermistor 1 error 2: No warmup
  After the main switch is turned on or the cover is closed, the heating roller temperature does not reach the ready temperature within 2 sec. after the heater switches on. -or- If the roller was below 45°C, the heating roller did not reach the ready temperature 2 sec. after reaching 45°C. Note: Thermistor 2 stops monitoring the temperature once Thermistor 1 detects ready temperature.
• Causes: • Thermistor is bent, installed incorrectly • Defective heating roller thermistor • Heating roller fusing lamp broken

• Code: SC543
• Description: Heating roller thermistor 1 error 3: Software - High temperature
  The thermistor detected a temperature over 230°C times within 1 sec.
• Causes: • TRIAC short, IOB defective • BICU defective • Fusing temperature out of control

• Code: SC544
• Description: Heating roller thermistor 1 error 4: Hardware - High temperature
  The thermistor detected a temperature over 260°C
• Causes: • TRIAC short • IOB defective • BICU defective • Fusing temperature control is erratic

• Code: SC545
• Description: Heating roller thermistor 1 error 5: Lamp remains on
  After hot roller reaches warmup temperature, the fusing lamps remained on at full capacity for 25 sec. after reaching the warmup temperature while the hot roller was not rotating.
• Causes: • Thermistor damaged, or out of position • Fusing lamp disconnected, broken

• Code: SC546
• Description: Heating roller thermistor 2 error 1: Thermistor disconnected
  The temperature measured by the heating roller thermistor does not reach 0°C after 45 sec. and remains over this temperature for 10 readings.
• Causes: • Loose connection of the heating roller thermistor • Defective heating roller thermistor