• Code: 819-0766d
• Description: VM full error
  Unexpected system memory size
• Causes: • Defective RAM DIMM
  • Defective SD card in slot 1 (lowest slot)
  • Defective controller
  • Software error

• Code: 819-4361
• Description: Cache error
  Cache error in the CPU
• Causes: • Defective CPU

• Code: 820
• Description: Self-Diagnostic Error: CPU
  During the boot monitor program and self-diagnostic, any exception or cut-in are not supposed to happen. If these happen, it is defined as SC.
• Causes: • Defective CPU device
  • Defective boot monitor program or self-diagnostic program

• Code: 821
• Description: Self-Diagnostic Error: ASIC
  ASIC error
• Causes: • Defective controller board

• Code: 823
• Description: Self-diagnostic Error: NIB
  MAC address check sum error
• Causes: • Defective controller

• Code: 824
• Description: Self-diagnostic Error: NVRAM
  The controller cannot recognize the standard NVRAM installed or detects that the NVRAM is defective.
• Causes: • NVRAM damaged or abnormal
  • Backup battery has discharged
  • NVRAM socket damaged

• Code: 826-1501
• Description: Self-diagnostic Error: RTC/Optional NVRAM
  Clock error
  • An RTC device is recognized, and the difference between the RTC device and the CPU exceeds the defined limit.
  • No RTC device is recognized.
• Causes: • RTC defective
  • NVRAM without RTC installed
  • Backup battery discharged

• Code: 826-15FF
• Description: RTC not detected
  The RTC device is not detected.
• Causes: • NVRAM without RTC installed
  • Backup battery discharged