• Code: SC541
• Description: Fusing Thermistor Open
  The fusing temperature detected by the thermistor was below 7°C for 15 s.
• Causes: • Fusing thermistor defective or out of position • Poor thermistor terminal connection

• Code: SC542
• Description: Fusing Temperature Warm-up Error
  One of the following occurred: • Hot roller did not reach target operation temperature within 6 minutes after the machine was powered or 6 minutes after the doors were closed. • Fusing temperature rose only 5oC toward the fusing temperature within 20 s after the machine was powered on, or after the doors were closed. • Fusing temperature rose only 5oC toward the fusing temperature within 25 s of the start of hot roller rotation.
• Causes: • Fusing lamp(s) disconnected • Thermistor out of position

• Code: SC543
• Description: Fusing Overheat Error 1: Software
  A fusing temperature of over 210°C is detected for 5 s by the fusing thermistor. This prevents the fusing lamps from switching on without a fusing lamp trigger signal.
• Causes: • AC drive board defective • BCU defective • Reload the BCU firmware

• Code: SC544
• Description: Fusing Overheat Error 2: Hardware
  The fusing temperature monitoring circuit detects abnormal fusing temperature.
• Causes: • AC drive board defective • BCU defective • Reload the BCU firmware

• Code: SC545
• Description: Fusing Overheat Error 3: Continuous Lamp On After warm-up and while the hot roller is not rotating, the fusing lamps remain on at full power for 90 s.
• Causes: • Fusing thermistor out of position • One or more fusing lamp is disconnected

• Code: SC546
• Description: Fusing Temperature Unstable
  The fusing temperature continues to fluctuate rapidly.
• Causes: • Poor thermistor connector connection • Poor fusing unit connection

• Code: SC547
• Description: Zero Cross Signal Malfunction
  The applied bandwidth is detected above 66 Hz or below 45 Hz, and no zero-cross signal detected for 5 s with the power relay ON.
• Causes: • Noise on the ac power line

• Code: SC550
• Description: Oil Supply/Cleaning Web End
  The oil supply/cleaning web end sensor stays on longer than the specified time after the web motor remains ON for 40 s.
• Causes: • Oil supply/cleaning web end (web on supply roller used up) • Oil supply/cleaning web motor defective NOTE: SP1902 001 (Web Motor Control . Web Consumption) should be set to .0. every time the oil supply/cleaning web is replaced. This setting will not take effect until the machine is cycled off/on.