• Code: 821
• Description: Self-Diagnostic Error: ASIC The ASIC returns an error during the self-diagnostic test at power on because the ASIC and CPU timer interrupts were compared and determined to be out of range.
• Causes: • Controller board defective

• Code: 824
• Description: Self-diagnostic Error: NVRAM The resident non-volatile RAM returns an error during the selfdiagnostic test at power on.
• Causes: • NVRAM damaged or abnormal • Backup battery has discharged • NVRAM socket damaged

• Code: 827
• Description: Self-diagnostic Error: RAM The resident RAM returned a verify error during the self-diagnostic test at power on.
• Causes: • Memory malfunction

• Code: 828
• Description: Self-diagnostic Error: ROM The resident read-only memory returned an error during the selfdiagnostic test at power on.
• Causes: • Controller board defective • Firmware defective

• Code: 900
• Description: Electronic total count error • The value of the total count has already exceeded its limit (9,999,999) • During counting, a defect was detected at the mechanical counter.
• Causes: • NVRAM defective

• Code: 951
• Description: F-GATE error at write request After the IPU receives an F-GATE signal, it receives another F-GATE signal (software timeout error)
• Causes: • Software defective • BICU defective

• Code: 954
• Description: Printer setting error The IPU does not respond with the settings required to start printer image processing.
• Causes: • Software defective

• Code: 955
• Description: Memory setting error The IPU does not respond with the settings required to start memory image processing.
• Causes: • Software defective