• Code: 547
• Description: Zero cross signal malfunction
  Zero cross signals are not detected within 5 seconds after the main power switch is turned on, or are not detected within 1 second after operation begins.
• Causes: • Power supply board defective • BICU defective

• 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: 630
• Description: CSS communication error
  An error occurs while the copier is trying to communicate with the CSS.
• Causes: • Communication error in the public line

• 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: 633
• Description: Accounting error 2
  After communication is established with the MF accounting device, a brake signal is issued.
• 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: 670
• Description: Engine start error
  The engine-ready signal is not issued within 70 seconds after the switch is turned on.
• Causes: • Engine board defective • Controller defective • Loose connection