• Code: SC547
• Description: Fusing (hot roller) temperature does not increase - Definition - [A] During warm-up, the fusing (hot roller) temperature does not increase when compared to the temperature 1 minute before.
• Causes: • Fusing (hot roller) thermistor defective • AC drive board defective • Main control board defective

• Code: SC551
• Description: Pressure roller thermistor open - Definition - [A] The output of the pressure roller thermistor goes to 5 V, corresponding to 0°C.
• Causes: • Pressure roller thermistor open • Main control board defective • Fusing unit not installed

• Code: SC552
• Description: Pressure roller warm-up error - Definition - [A] Pressure roller temperature does not reach the ready temperature within 12 minutes after the main switch is turned on.
• Causes: • Pressure roller thermistor not in position • Pressure roller lamp open • Pressure roller thermistor defective • Main control board defective

• Code: SC553
• Description: Pressure roller overheat - Definition - [A] A pressure roller temperature of over 180°C is detected 5 times.
• Causes: • Pressure roller thermistor defective • AC drive board defective (triac) • Main control board defective

• Code: SC554
• Description: Pressure roller low temperature abnormal - Definition - [A] A pressure roller temperature of below 70°C is detected 6 times after warm-up is completed.
• Causes: • Pressure roller thermistor defective • AC drive board defective • Main control board defective • Pressure roller thermistor not in position • Pressure roller lamp open

• Code: SC555
• Description: Pressure roller ready temperature abnormal - Definition - [A] The pressure roller temperature goes below the ready temperature (10°C below the control temperature) after warm-up is completed, and does not reach the ready temperature within 6 minutes.
• Causes: • Pressure roller thermistor defective • AC drive board defective • Main control board defective

• Code: SC557
• Description: Pressure roller temperature does not increase - Definition - [A] During warm-up, pressure roller temperature does not increase when compared to the temperature 1 minute before.
• Causes: • Pressure roller thermistor defective • AC drive board defective • Main control board defective

• Code: SC558
• Description: Zero cross signal abnormal - Definition - [A] Zero cross signals are not detected within a certain period.
• Causes: • Main control board defective