• Code: 2000
• Description: NVRAM error
• Causes: NVRAM erase or write error has occurred.
• Remedy: Replace the Main Board.

• Code: 2002
• Description: SDRAM error
• Causes: Any value cannot be input when accessing SDRAM to write the value.
• Remedy: Replace the Main Board.

• Code: 2003
• Description: FLASH BOOT SUM CHECK error
• Causes: 1. Installation of the firmware has been failed. 2. The Flash ROM is damaged.
• Remedy: 1. Re-install the firmware. 2. Replace the Main Board.

• Code: 200A
• Description: F/W load error
• Causes: Reading/decompressing the firmware has been failed.
• Remedy: 1. Re-install the firmware. 2. Replace the Main Board.

• Code: 200D
• Description: System interrupt watchdog time-out error
• Causes: A system failure such as CPU failure, defective cash or the like has occurred.
• Remedy: Replace the Main Board.

• Code: 3000
• Description: AC shut-off
• Causes: The AC power has been shut off due to a power failure, unplugged, Power Supply Board failure, or Main Board failure or the like.
• Remedy: 1. Replace the Power Supply Board. 2. Replace the Main Board.

• Code: Dxxy
• Description: Service call for FW debugging
• Causes: This is an error for debugging in the design stage. However, it may occur due to unexpected reasons such as external noises.
• Remedy: 1. Re-install the firmware. 2. Replace the Main Board.

• Code: Fxxx
• Description: CPU related service call
• Causes: • The firmware has a defect. • The Main Board is broken.
• Remedy: 1. Re-install the firmware. 2. Replace the Main Board.