• Code: E744-0900
• Description: Detection of invalid Bootable
• Causes: Bootable of another model was detected.
• Remedy: 1. Turn OFF and then ON the power. 2. Reinstall the firmware. 3. Replace the Main Controller PCB.

• Code: E744-1000
• Description: Firmware error
• Causes: Mismatch of the model for which the firmware was downloaded is detected.
• Remedy: 1. Install the firmware according to the model.

• Code: E744-1100
• Description: System error
• Causes: System error
• Remedy: 1. Turn OFF and then ON the power. 2. Replace the Main Controller PCB.

• Code: E748-2012
• Description: System error
• Causes: System error
• Remedy: Contact the sales company.

• Code: E748-4000
• Description: System error
• Causes: System error
• Remedy: 1. Replace the Main Controller PCB. 2. Contact the sales company.

• Code: E748-4020
• Description: System error
• Causes: System error
• Remedy: Contact the sales company.

• Code: E760-0000
• Description: Firmware error
• Causes: An error in connection occurred due to controller software.
• Remedy: Due to firmware error, the possibility of solving the error by replacing the Main Controller PCB is low. 1. Check the downloaded firmware again.

• Code: E805-0001
• Description: Fan 1 failure
• Causes: Fan 1 failure
• Remedy: 1. Check the connection of the Fan 1 2. Replace the Fan 1. 3. Replace the DC Controller PCB.