• Code: 901
• Description: Mechanical total counter
  The mechanical total counter does not work properly.
• Causes: • Mechanical total counter defective • BICU defective • Disconnected mechanical total counter

• Code: 903
• Description: Engine total counter error
  The checksum of the total counter is not correct.
• Causes: • NVRAM on the BICU defective

• Code: 920
• Description: Printer error
  A fatal error is detected in the printer application program
• Causes: • Printer application program defective • Hardware configuration incorrect (including memory shortage)

• Code: 921
• Description: Printer font error
  Necessary font files are not found.
• Causes: • Font file not installed

• Code: 925
• Description: Net file error
  The net-file management-file contains a fatal error.
• Causes: • Data corruption

• Code: 928
• Description: Memory error
  The machine detects a discrepancy in the write/read data during its write/read test (done at power off/on and at recovery from low power or night/off mode).
• Causes: • Memory defective • BICU defective • Poor connection between BICU and memory

• Code: 929
• Description: IMAC hardware error
  A memory control job is not completed within a certain period.
• Causes: • IMAC on the GW controller board defective • BICU defective • Poor connection

• Code: 954
• Description: Printer application program error
  The printer status does not become ready when the printer application program is necessary for image processing.
• Causes: • Application program defective