• Code: SC591
• Description: Toner Supply Pump Motor Error
  The toner supply pump motor lock signal did not change within 1 s while the motor is operating.
• Causes: • Motor lock due to overload • BCU defective

• Code: SC592
• Description: Toner Bank Motor Error
  An abnormal signal was received from the toner bank motor.
• Causes: • Toner bank motor defective • Bank motor connector loose • Too much load on the drive mechanism

• Code: SC593
• Description: Toner Suction Motor Replace
  The operation time of the motor is over 600 hours.
• Causes: • Service life of the toner suction motor is finished. NOTE: A near-end message is displayed in the LCD when the operation time exceeds 570 hours.

• Code: SC601
• Description: Communication Error Between BCU and MCU
  One or more of the following occurred: • The BCU cannot communicate with the MCU within 0.8 s after power on. • A BREAK signal was detected after connection between the BCU and MCU. • After a communication error, three tries to communicate with the MCU failed.
• Causes: • Poor connection between BCU and MCU • BCU defective • MCU defective

• Code: SC620
• Description: Communication Error between BCU and ADF 1
  The TXD and RXD signals between BCU and ADF main board do not stabilize.
• Causes: • Poor connection between the BCU board and the ADF main board • Noise on interface cable

• Code: SC621
• Description: Communication Error between BCU and ADF 2
  The TXD and RXD signals between BCU and ADF main board do not stabilize.
• Causes: • Poor connection between the BCU board and the ADF main board • ADF main board defective • BCU board defective

• Code: SC622
• Description: Communication Error between BCU and ADF 3
  Software error after abnormal user operation.
• Causes: • Software error; switch the machine off/on

• Code: SC625
• Description: The BCU cannot communicate with the finisher properly.
  The BCU cannot communicate with the finisher properly.
• Causes: • Poor connection between the BCU board and the finisher main board • Finisher main board defective • BCU board defective • Noise on the interface cable