• Code: 877
• Description: Data Overwrite Security SD card error
  The all delete function did not execute but the Data Overwrite Security Unit (D362) is installed and activated.
• Causes: SD card defective
• Remedy: 1. Insert the SD card correctly. 2. Replace the NVRAM. 3. Reinstall the DOS from the SD card.

• Code: 878
• Description: TPM electronic recognition error
  The main machine firmware failed to recognize TPM because USB flash is not operating or a system module was updated incorrectly.
• Causes: Controller board defective
• Remedy: Replace the controller board.

• Code: 900
• Description: Electrical total counter error
• Causes: NVRAM incorrect typNVRAM defectiveNVRAM data scrambled. Unexpected error from external source
• Remedy: 1. Replace the NVRAM.

• Code: 920
• Description: Printer error 1
  An internal application error was detected and operation cannot continue.
• Causes: Software defective. Insufficient memory
• Remedy: 1. Turn the machine Off and On. 2. Change the Controller firmware.

• Code: 921
• Description: Printer error 2
  When the application started, the necessary font was not on the SD card.
• Causes: Font not on the SD card
• Remedy: 1. Copy the necessary font on the SD card.

• Code: 990
• Description: Software performance error
  The software attempted to perform an unexpected operation due to: 1) software bug 2) incorrect internal parameter 3) insufficient working memory
• Causes: Software defective
• Remedy: 1. Turn the machine power Off and On. 2. Reinstall the controller and/or main firmware.

• Code: 991
• Description: Software continuity error
  The software attempted to perform an unexpected operation. However, unlike SC990, the object of the error is continuity of the software.
• Causes: Software defective
• Remedy: 1. No operation required. • This SC code does not appear on the panel, and is only logged.

• Code: 992
• Description: Unexpected Software Error
  Software encountered an unexpected operation not defined under any SC code.
• Causes: Software defective. An error undetectable by any other SC code occurredxpect.
• Remedy: 1. Turn the machine Off and On.