• Code: E748-2000
• Description: There is a mismatch between controller board and SDRAM size.
  An error occurs when accessing the chip on the main controller PCB.
• Remedy: Replace the main controller PCB.

• Code: E748-2001
• Description: There is a mismatch between controller board and SDRAM size.
  An error occurs when accessing the memory on the main controller PCB.
• Remedy: 1. Unplug/plug in the memory. 2. Replace the main controller PCB.

• Code: E748-4910
• Description: There is a mismatch between controller board and SDRAM size.
  A controller board that does not match the product is defected.
• Remedy: - Replace the main controller PCB.

• Code: E804-0000
• Description: Error in power supply cooling fan
  Failure in power supply cooling fan (while the fan is not working) When lock signal is detected for 5 sec while the fan is stopped.
• Remedy: - Disconnect and then connect the connector (J303) on DC controller PCB. - Replace the power supply cooling fan - Replace DC controller PCB

• Code: E804-0001
• Description: Error in power supply cooling fan
  Failure in rotation of power supply cooling fan When lock signal failed to be detected for 5 sec while the fan is driven.
• Remedy: - Disconnect and then connect the connector (J303) on DC controller PCB. - Replace the power supply cooling fan - Replace DC controller PCB

• Code: E805-0000
• Description: There is a fan error.
  Failure in heat exhaust fan (front) (FM2) When lock signal is detected for 5 sec while the fan is stopped.
• Remedy: - Replace the heat exhaust fan (front) - Replace DC controller PCB.

• Code: E805-0001
• Description: There is a fan error.
  Failure in rotation of heat exhaust fan (front) (FM2) When lock signal failed to be detected for 5 sec while the fan is driven.
• Remedy: - Replace the heat exhaust fan (front) - Replace DC controller PCB

• Code: E805-0002
• Description: There is a fan error.
  Failure in heat exhaust fan (rear) (FM1) When lock signal is detected for 5 sec while the fan is stopped.
• Remedy: - Replace the heat exhaust fan (rear) - Replace DC controller PCB