• Code: C6030
• Description: Fuser thermistor 1 break error During warming up, fuser thermistor 1 does not detect temperature rise of 1 C/1.8F for 10 s. When the difference of temperature of fuser thermistor 1 and 2 becomes 100C/212F or more.
• Causes: Defective fuser heater 1.
  Installation defectiveness on fuser thermistor 1.
  Defective PWB.
• Remedy: Defective fuser heater 1. Check for continuity across each heater. If none, replace the fuser unit.
  Installation defectiveness on fuser thermistor 1. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6040
• Description: Fuser heater error
  Fuser thermistor 1 detects temperature change of 20C/36F or more for 160 ms 100 times or more since the power is turned on.
• Causes: Defective fuser heater 1.
  Installation defectiveness on fuser thermistor 1.
  Defective PWB
• Remedy: Defective fuser heater 1. Check for continuity across each heater. If none, replace the fuser unit.
  Installation defectiveness on fuser thermistor 1. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6050
• Description: Abnormally low fuser thermistor 1 temperature
  During printing, the temperature at the heat roller lower than 100C/212F is detected continuously for 1 s.
• Causes: Defective fuser heater 1.
  Defective PWB
• Remedy: Defective fuser heater 1. Replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6100
• Description: Fuser heater 2 break
  Fuser thermistor 2 detected less than 100C/212F for 120 s during driving. Fuser thermistor 2 deduced less than 150C/302F for 300 s during driving. Fuser thermistor 2 deduced less than 100C/212F for 5 s during driving.
• Causes: Defective fuser heater 2.
  Defective fuser thermostat 2.
  Installation defectiveness on fuser thermistor 2.
  Defective PWB.
• Remedy: Defective fuser heater 2. Check for continuity across each heater. If none, replace the fuser unit.
  Defective fuser thermostat 2. Check for continuity across thermostat. If none, remove the cause and replace the fuser unit.
  Installation defectiveness on fuser thermistor 2. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6120
• Description: Abnormally high fuser thermistor 2 temperature
  The fuser temperature exceeds 190C/ 374F for 1 s.
• Causes: Installation defectiveness on fuser thermistor 2.
  Defective PWB
• Remedy: Installation defectiveness on fuser thermistor 2. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6130
• Description: Fuser thermistor 2 break error Fuser thermistor 2 detects a temperature of 30 C/86F or lower for 45 s.
• Causes: Installation defectiveness on fuser thermistor 2.
  Defective fuser heater 2.
  Defective PWB.
• Remedy: Installation defectiveness on fuser thermistor 2. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective fuser heater 2. Check for continuity across each heater. If none, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6200
• Description: Fuser heater 1 edge break
  During warming up, fuser thermistor 1 does not detect temperature rise of 1C/ 1.8F for 10 s. Fuser thermistor 1 does not reach 90F even after 30 s during warming up.
• Causes: Defective fuser heater 1.
  Defective fuser thermostat 1.
  Installation defectiveness on fuser thermistor 1.
  Defective PWB.
• Remedy: Defective fuser heater 1. Check for continuity across each heater. If none, replace the fuser unit.
  Defective fuser thermostat 1. Check for continuity across thermostat. If none, remove the cause and replace the fuser unit.
  Installation defectiveness on fuser thermistor 1. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.

• Code: C6220
• Description: Abnormally high fuser thermistor 1 edge temperature
  The fuser temperature exceeds 250C/ 482F for 1 s.
• Causes: Installation defectiveness on fuser thermistor 1.
  Defective PWB.
• Remedy: Installation defectiveness on fuser thermistor 1. Measure the resistance. If it is ∞, replace the fuser unit.
  Defective PWB. Replace the power source PWB or engine PWB and check for correct operation.