• Code: 590
• Description: Left exhaust fan motor error (D160/D161/D170)
  The CPU detects an exhaust fan lock signal for more than 5 seconds.
• Causes: • Loose connection of the exhaust fan motor • Too much load on the motor drive

• Code: 591
• Description: Rear exhaust fan motor error (D160/D161/D170)
  The CPU detects an exhaust fan lock signal for more than 5 seconds.
• Causes: • Loose connection of the exhaust fan motor • Too much load on the motor drive

• Code: 620
• Description: Communication error between BICU and ADF
  The BICU does not receive a response from the ARDF main board for 4 seconds or more. The BICU receives a break signal from the ARDF main board.
• Causes: • Poor connection between the BICU and ARDF main board (DF connector) • ARDF main board • BICU defective

• Code: 621
• Description: ADF connection error (D160/D161/D170)
  An incorrect ARDF is detected. An ARDF (including the correct ARDF) is installed while the copier is in the energy saver mode.
• Causes: • ARDF incorrect • The connector of the ARDF is installed while the machine is in the energy saver mode.

• Code: 622
• Description: Paper Bank communication error
  An error occurs during line connection. A communication error report is received from the UART.
• Causes: • The paper bank's control board is faulty. • Defective BCU/IOB • The paper bank's connection is faulty.

• Code: 632
• Description: Accounting error 1
  An error is detected during the communication with the MF accounting device.
• Causes: • Accounting device • Loose connection

• Code: 634
• Description: Accounting RAM error
  An error is detected in the RAM that saves the information on the MF accounting.
• Causes: • Accounting device

• Code: 635
• Description: Accounting RAM error
  An error is detected in the RAM that saves the information on the MF accounting.
• Causes: • Accounting device