• Code: E733-0001
• Description: Printer communication error
• Causes: Communication error occurred after normal startup.
• Remedy: 1. Turn OFF and then ON the power. 2. Replace the Main Controller PCB.

• Code: E733-0004
• Description: Printer communication error
• Causes: Command error
• Remedy: 1. Turn OFF and then ON the power. 2. Replace the Main Controller PCB.

• Code: E733-0006
• Description: Printer communication error
• Causes: Unknown communication error
• Remedy: 1. Turn OFF and then ON the power. 2. Replace the Main Controller PCB.

• Code: E740-0002
• Description: An invalid MAC address has been detected.
• Causes: An invalid MAC address has been detected.
• Remedy: 1. Check the Mac address. 2. Replace the Main Controller PCB.

• Code: E740-0004
• Description: Network Chip error detection
• Causes: Controller Chip access error
• Remedy: 1. Turn OFF and then ON the power. 2. Replace the Main Controller PCB.

• Code: E744-0800
• Description: System error
• Causes: System error
• Remedy: Contact the sales company.

• 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: Install the firmware according to the model.