• Code: 674
• Description: Controller data transfer error
• Causes:

• Code: 687
• Description: PER-command error
  The machine does not receive PAPI-PER command for specific time, after PAPI-PES was issued.
• Causes: • Defective controller

• Code: 688
• Description: PAPI-PES error
  The machine does not receive PAPI-PES command after paper is in registration.
• Causes: • Defective controller • Poor communication

• Code: 816
• Description: Energy saving I/O sub-system error
  The energy saving I/O sub-system detects an error.
• Causes: • Controller board defective

• Code: 817
• Description: Monitor error
  This is a file detection and electronic file signature check error when the boot loader attempts to read the self-diagnostic module, system kernel, or root system files from the OS Flash ROM, or the items on the SD card in the controller slot are false or corrupted.
• Causes: • OS Flash ROM data defective; change the controller firmware • SD card data defective; use another SD card

• Code: 818
• Description: Watchdog error
• Causes:

• Code: 819
• Description: Fatal kernel error
  Due to a control error, a RAM overflow occurred during system processing. One of the following messages was displayed on the operation panel.
• Causes: • System program defective • Controller board defective • Optional board defective • Replace controller firmware

• Code: 820
• Description: Self-Diagnostic Error: CPU
  The central processing unit returned an error during the self-diagnostic test.
• Causes: • Controller board defectivewas issued. • Software defective