• Code: 611
• Description: Communication break error between SBCU and ADF
  The SBCU received a break (LOW) signal from the ADF main board.
• Causes: • Serial line connecting SBCU and ADF unstable • Connectors between SBCU and ADF loose, disconnected, or damaged

• Code: 612
• Description: Communication command error between SBCU and ADF
• Causes: • Update the firmware • SBCU board defective

• Code: 620
• Description: Communication timeout between SBCU and finisher: Error 1
  The SBCU cannot receive a response within 100 ms after 3 attempts after sending data to the finisher.
• Causes: • Serial line connecting SBCU and finisher unstable • External noise

• Code: 621
• Description: Communication timeout between SBCU and finisher: Error 2
  A break (LOW) signal was received from the finisher.
• Causes: • Serial line connecting SBCU and finisher unstable • External noise

• Code: 650
• Description: Communication timeout error between SBCU and duplex unit
  The SBCU cannot receive a response within 1 sec. from the duplex unit.
• Causes: • Serial line connecting SBCU and duplex unit unstable • External noise • SBCU board and duplex main board connection defective or loose • Duplex main board defective • SBCU board defective

• Code: 669
• Description: EEPROM Communication Error
  The machine failed to detect a match between the read/write data for the EEPROM on the SBCU after 3 attempts.
• Causes: • EEPROM installed incorrectly • EEPROM defective After you check the installation, turn the machine off and on. If this does not repair the problem, replace the SBCU.

• Code: 670
• Description: Engine response error
  After powering on the machine, a response is not received from the engine within 30 seconds.
• Causes: • SBCU installed incorrectly • SBCU defective • Controller board defective

• Code: 672
• Description: Controller-to-operation panel communication error at startup
  After powering on the machine, the communication circuit between the controller and the operation panel is not opened, or communication with controller is interrupted after a normal startup.
• Causes: • Controller stall • Controller board installed incorrectly • Controller board defective • Operation panel connector loose or defective