• Code: SC542
• Description: Fusing temperature warm-up error
  The fusing temperature does not reach the fusing standby temperature within 135.0 seconds after the main switch is turned on.
• Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermofuse open • BCU board defective • AC drive board defective

• Code: SC543
• Description: Fusing overheat error 1
  A fusing temperature of over 231°C is detected for 5 seconds by the fusing thermistor.
• Causes: • Fusing thermistor defective • BCU board defective • AC drive baord defective

• Code: SC545
• Description: Fusing overheat error 2
  The fusing lamp stays on at full power for 30.0 seconds while in the stand-by condition after warm-up is completed.
• Causes: • Fusing thermistor out of position

• Code: SC546
• Description: Fusing ready temperature malfunction
  The fusing temperature goes 20 °C below or 20 °C over the stand-by temperature after warm-up is completed.
• Causes: • Poor thermistor connection • Poor connection of the sliding connector between the fusing unit and the rear of the machine

• Code: SC547
• Description: Zero cross signal malfunction
  Zero cross signals are not detected within a certain period.
• Causes: • AC drive board defective • BCU board defective

• Code: SC600
• Description: Communication error between SCU and operation panel
  The SCU board cannot communicate with the operation panel CPU properly.
• Causes: • Poor connection • SCU board defective • Operation panel board defective

• Code: SC601
• Description: Communication error between BCU and EX-IPU
  The BCU board cannot communicate with the EX-IPU board properly.
• Causes: • Poor connection of the interface harness which connects the BCU board and the EX-IPU board

• Code: SC602
• Description: Communication error between BCU and fusing control unit
  The BCU board cannot communicate with the fusing control unit properly.
• Causes: • BCU board defective