• Code: E730 D001
• Description: System error
• Causes: System error
• Remedy: Turning OFF and then ON the main power executes auto recovery.

• Code: E733 0000
• Description: Printer communication error
• Causes: Communication error at initial communication, and packet error
• Remedy: 1. Turn OFF and then ON the main power. 2. Replace the Main Controller PCB.

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

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

• Code: E740 0002
• Description: Detected the injustice of the Mac address
• Causes: Detected the injustice of the Mac address
• Remedy: 1. Check the Mac address. 2. 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.

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