• 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: 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. Check the downloaded firmware again.

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

• Code: E805-0002
• Description: Fan 1 failure
• Causes: Fan 1 failure
• Remedy: 1. Check the connection of the Fan 1. 2. Replace the Fan . 3. Replace the DC Controller PCB.

• Code: E805-0008
• Description: Fan 4 failure
• Causes: Fan 4 failure
• Remedy: 1. Check the connection of the Fan 4. 2. Replace the Fan 4. 3. Replace the DC Controller PCB.

• Code: E805-0009
• Description: Fan 2 failure
• Causes: Fan 2 failure
• Remedy: 1. Check the connection of the Fan 2. 2. Replace the Fan 2. 3. Replace the DC Controller PCB.

• Code: E805-0010
• Description: Duplex Fan failure
• Causes: Duplex Fan failure
• Remedy: 1. Check the connection of the Duplex Fan. 2. Replace the Duplex Fan. 3. Replace the DC Controller PCB.