• Code: SC544
• Description: Heating roller thermistor 1 error 4: Hardware - High temperature. The thermistor detected a temperature over 260°C.
• Remedy: • TRIAC short • IOB defective • BICU defective • Fusing temperature control is erratic Do SP5810 to cancel the SC fusing code.

• 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.
• Remedy: • 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.
• Remedy: • Loose connection of the heating roller thermistor • Defective heating roller thermistor

• Code: SC547
• Description: Zero cross error. When the main switch is turned ON, the machine checks how many zero-cross signals are generated within 500 ms. This SC code is issued if the number of zerocross signals detected is either more than 66 or less than 45 for 10 readings. Note: Zero cross signals, generated from an ac power supply, are used to generate a trigger pulses to control the applied power accurately.
• Remedy: • Electrical noise on the power supply line • Fusing relay damaged: replace the PSU. Normally, this SC is cancelled if you do SP5810 to cancel the SC fusing code.

• Code: SC548
• Description: Heating roller thermistor 2 error 2: Failed to reach warmup temperature. 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 warmup temperature.
• Remedy: • Thermistor is bent, installed incorrectly • Defective heating roller thermistor • Heating roller fusing lamp broken • Defective BICU

• Code: SC549
• Description: Heating roller thermistor 2 error 3: Software - High Temperature. The thermistor detected a temperature over 250°C.
• Remedy: • TRIAC short • IOB defective • BICU defective • Fusing temperature control is erratic. Do SP5810 to cancel the SC fusing code.

• Code: SC550
• Description: Heating roller thermistor 2 error 4: Hardware - High Temperature. The thermistor detected a temperature over 260°C.
• Remedy: • TRIAC short • IOB defective • BICU defective • Fusing temperature control is erratic Do SP5810 to cancel the SC fusing code.

• Code: SC551
• Description: Pressure roller thermistor error 1. The temperature measured by the pressure roller thermistor does not reach 0°C for 200 sec.
• Remedy: • Loose connection of the pressure roller thermistor • Defective pressure roller thermistor • Defective BICU Do SP5810 to cancel the SC fusing code.