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

• Code: 823
• Description: Self-diagnostic Error: Network Interface
  The network interface board returned an error during the self-diagnostic test.
• Causes: • Network interface board defective • Controller board defective

• Code: 824
• Description: Self-diagnostic Error: NVRAM
  The resident non-volatile RAM returned an error during the self-diagnostic test.
• Causes: • Replace the NVRAM on the controller board • Replace the controller board

• Code: 826
• Description: Self-diagnostic Error: NVRAM/Optional NVRAM
  The NVRAM or optional NVRAM returned an error during the self-diagnostic test.
• Causes: • Replace the NVRAM on the controller board

• Code: 827
• Description: Self-diagnostic Error: RAM
  The resident RAM returned a verify error during the self-diagnostic test.
• Causes: • Download controller firmware again

• Code: 828
• Description: Self-diagnostic Error: ROM
  The resident read-only memory returned an error during the self-diagnostic test.
• Causes: • Controller board defective • Download controller firmware again

• Code: 829
• Description: Self-diagnostic Error: Optional RAM
  The optional RAM returned an error during the self-diagnostic test.
• Causes: • Replace the optional memory board • Controller board defective

• Code: 838
• Description: Self-diagnostic Error: Clock Generator
  A verify error occurred when setting data was read from the clock generator via the I2C bus.
• Causes: • Replace the controller board