• Code: 790
• Description: Finisher staple trimming hopper full
  The staple waste hopper is full of cut staples.
• Causes: • If the hopper is full, empty the hopper • If the hopper is not full, the hopper full sensor is disconnected, 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
  While the system program is running, a bus hold or interrupt program goes into an endless loop, preventing any other programs from executing.
• Causes: • System program defective; switch off/on, or change the controller firmware if the problem cannot be solved • Controller board defective • Controller option malfunction

• 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 firmwarelayed

• Code: 821
• Description: Self-diagnostic error: ASIC
  The Write & Verify check of the ASIC returned an error. Note: The main ASIC module on the controller board controls the bus of the ROM device.
• Causes: • Replace the controller board

• Code: 822
• Description: Self-diagnostic error: HDD
• Causes: 3003 Check performed when HDD is installed: • HDD device busy for over 31 s. • After a diagnostic command is set for Sthe HDD, but the device remains busy for over 6 s. A diagnostic command is issued to the HDD device but the result is an error • HDD defective • HDD harness disconnected, defective • Controller board defective 3004 No response to the self-diagnostic command from the ASIC to the HDDs • HDD defective 3013 Mandolin does not respond, the HDD device remains BUSY for more than 31 s, or the BUSY signal does not drop within 6 s after the diagnostic command is issued to the HDDs. • HDD defective • HDD connector loose or defective • Controller defective 3014 Error returned from HDD in response to the self-diagnostic command, Mandolin could not be located due to a read/write error at the HDD register. • HDD defective

• Code: 824
• Description: Self-diagnostic error 4: NVRAM
  One or more of the following conditions exist: • NVRAM not present. • NVRAM damaged • NVRAM socket damaged
• Causes: • NVRAM defective • Controller board defective • NVRAM backup battery exhausted • NVRAM socket damaged Note: In every case, the controller board must be replaced.

• Code: 826
• Description: Self-diagnostic error 6: NVRAM (option NVRAM)
• Causes: 1501 The difference between the 1 s measured for RTC in the NVRAM and the 1 s timeout of the CPU is out of range, or the NVRAM is not detected. • NVRAM defective • NVRAM installed incorrectly 15FE Backup battery error. Battery is exhausted or not within rated specification. • The battery is attached permanently to the controller board. Replace the controller board.