• Code: 820
• Description: Self-diagnostics error: CPU [XXXX]: Detailed error code
• Causes: [0001] to [06FF] [0801] to [4005] CPU error During the self-diagnostic, the controller CPU detects an error. There are 47 types of error code (0001 to 4005) depending on the cause of the error. The CPU detects an error and displays the specific error code with the program address where the error occurs. • System firmware problem • Defective controller 1. Turn the main switch off and on. 1. Reinstall the controller system firmware. 2. Replace the controller. When the problem cannot be fixed with the above procedure, the following information displayed on the screen needs to be fed back to a technical support center. • SC code • Detailed error code • Program address [0702] [0709] [070A] CPU/Memory Error • System firmware problem • Defective RAM-DIMM • Defective controller 1. Reinstall the controller system software. 2. Replace the RAM-DIMM. 3. Replace the controller.
• Remedy:

• Code: 821
• Description: Self-diagnostics error: ASIC [XXXX]: Detailed error code
• Causes: [0B00] ASIC error The write-&-verify check error has occurred in the ASIC. • Defective ASIC device Replace the controller. [0B06] ASIC detection error The I/O ASIC for system control is not detected. • Defective ASIC • Defective North Bridge and PCI I/F Replace the controller board. [0B10] SHM register error • The initialization of bus connection or read for SHM fails. • The register of SHM is different from specified value. • Defective connection bus • Defective SHM Replace the controller board [0D05] Self-diagnosis error: ASIC The CPU checks if the ASIC timer works correctly compared with the CPU timer. If the ASIC timer does not function in the specified range, this SC code is displayed. • System firmware problem • Defective RAM-DIMM • Defective controller 1. Reinstall the controller system firmware. 1. Replace the RAM-DIMM. 2. Replace the controller board.
• Remedy:

• Code: 822
• Description: Self-diagnostic error: HDD (Hard Disk Drive) [XXXX]: Detailed error code. [3003] Timeout error [3004] Command error - - When the main switch is turned on or starting the self-diagnostic, the HDD stays busy for the specified time or more.
• Causes: • Loose connection • Defective HDD • Defective controller
• Remedy: 1. Check that the HDD is correctly connected to the controller. 2. Replace the HDD. 3. Replace the controller.

• Code: 824
• Description: Self-diagnosis error: Standard NVRAM
  The controller cannot recognize the standard NVRAM installed or detects that the NVRAM is defective.
• Causes: • Loose connection • Defective standard NVRAM • Defective controller board • Worn-out battery in the NVRAM
• Remedy: 1. Check the standard NVRAM is firmly inserted into the socket. 2. Replace the NVRAM. 3. Replace the controller board.

• Code: 826
• Description: Self-diagnostic Error: RTC/optional NVRAM The RTC device is not detected.
• Causes: • RTC defective • NVRAM without RTC installed • Backup battery discharged
• Remedy: Replace the NVRAM with another NVRAM with an RTC device.

• Code: 827
• Description: Self-diagnostic error: Standard SDRAM DIMM [XXXX]: Detailed error code
• Causes: [0201] Verification error Error detected during a write/verify check for the standard RAM (SDRAM DIMM). • Loose connection • Defective SDRAM DIMM • Defective controller 1. Turn the main switch off and on. 2. Replace the SDRAM DIMM. 3. Replace the controller. [0202] Resident memory error The SPD values in all RAM DIMM are incorrect or unreadable. • Defective RAM DIMM • Defective SPD ROM on RAM DIMM • Defective 12C bus Replace the RAM DIMM.
• Remedy:

• Code: 828
• Description: Self-diagnostic error: ROM [XXXX]: Detailed error code
• Causes: [0101] Check sum error 1 • The boot monitor and OS program stored in the ROM DIMM is checked. If the check sum of the program is incorrect, this SC code is displayed. [0104] Check sum error 2 • All areas of the ROM DIMM are checked. If the check sum of all programs stored in the ROM DIMM is incorrect, this SC code is displayed. - - • Defective controller
• Remedy: 1. Turn the main switch on and off. 2. Replace the controller.

• Code: 829
• Description: Self-diagnosis error: optional RAM [XXXX]: Detailed error code. [0401] Verification error (Slot 1) The data stored in the optional RAM in Slot 1 does not match the data when reading. [0402] Composition error (Slot 1) The result of checking the composition data of the optional RAM in Slot 1 on the controller is incorrect.
• Causes: • Not specified RAM DIMM installed • Defective RAM DIMM
• Remedy: 1. Turn the main switch off and on. 2. Replace the RAM DIMM. 3. Replace the controller board.