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

• 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
  IMAC error is registered when the GDI controller starts IMAC. Memory job does not complete after the GDI controller has started IMAC.
• Causes: • IMAC defective • IPU defective

• 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

• Code: 955
• Description: Image transfer error
  The controller is not able to transfer images when the engine needs them.
• Causes: • Application program defective

• Code: 964
• Description: Status error (laser optics housing unit)
  The optics-housing unit does not become ready within 17 seconds after the request.
• Causes: • Software defective

• Code: 981
• Description: NVRAM error
  The machine detects a discrepancy in the NVRAM write/read data when attempting to save actual data to the NVRAM (i.e. during actual use).
• Causes: • NVRAM defective • Poor connection between BICU and NVRAM • NVRAM is not connected • BICU defective

• Code: 982
• Description: Localization error
  The localization settings in the nonvolatile ROM and RAM are different (SP5807).
• Causes: • First machine start after the NVRAM is replaced • Incorrect localization setting • NVRAM defective