• Code: 590
• Description: Left exhaust fan motor error
  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
  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 ADF main board for 4 seconds or more. The BICU receives a break signal from the ADF main board.
• Causes: • Poor connection between the BICU and
  ADF main board (DF connector)
  • ADF main board defective
  • BICU defective

• Code: 621
• Description: ADF connection error
  An incorrect ADF (an ADF for some other copier) is detected.
• Causes: • ADF incorrect (The ADF for B039/B040/ B043 or B121/B122/B123/B259/ B260/B261 is installed on a B282/B283)
  • The connector of the ADF is removed while the machine is in the energy saver mode

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

• Code: 635
• Description: Accounting battery error
  An error is detected in the battery that is in the MF accounting device.
• Causes: Accounting device defective

• Code: 692
• Description: Controller board communication abnormal
  Communication error between the printer part of the controller board and BICU.
• Causes: • The connector is abnormal between the controller board and the BICU board.