• Code: 611
• Description: Communication break error between BICU and ADF
  The BICU receives a break signal from the ADF main board.
• Causes: • Serial line connecting BICU and ADF unstable • External noise • ADF main board defective • BICU board defective

• Code: 612
• Description: Communication command error between BICU and ADF
  The BICU sends a command to the ADF main board that it cannot execute.
• Causes: • Abnormal operation performed by software

• Code: 620
• Description: Communication timeout error between BICU and finisher or mailbox
  The BICU cannot receive a response within 100 ms after 3 attempts after sending data to the finisher or mailbox.
• Causes: • Serial line connecting BICU and finisher unstable • External noise • BICU board and finisher main board connection defective or loose • Finisher main board defective • BICU board defective

• Code: 621
• Description: Communication timeout error between BICU and finisher or mailbox
  A break (low) signal was received from the finisher or the mailbox.
• Causes: • Serial line connecting BICU and finisher unstable • External noise

• Code: 623
• Description: Communication timeout error between BICU and paper tray unit
  The BICU cannot receive a response within 100 ms after 3 attempts after sending data to the paper tray unit.
• Causes: • Serial line connecting BICU and paper tray unit unstable • External noise • BICU board and paper tray main board connection defective or loose • Paper tray main board defective • BICU board defective

• Code: 624
• Description: Communication break error between BICU and paper tray unit
  The BICU cannot communicate with the paper tray unit normally as a result of receiving a break signal.
• Causes: • Serial line connecting BICU and paper tray unit unstable • External noise • BICU board and LCT main board connection defective or loose • Optional paper feed unit interface board defective • BICU board defective

• Code: 626
• Description: Communication timeout error between BICU and LCT
  The BICU cannot receive a response within 100 ms after 3 attempts after sending data to the LCT.
• Causes: • Serial line connecting BICU and LCT unit unstable • External noise • BICU board and LCT main board connection defective or loose • LCT interface board defective • BICU board defective

• Code: 627
• Description: Communication break error between BICU and LCT
  The BICU cannot communicate with the LCT unit normally as a result of receiving a break signal.
• Causes: • Serial line connecting BICU and LCT unit unstable • External noise • BICU board and LCT main board connection defective or loose • LCT interface board defective • BICU board defective