Causes: Communication error between the Engine Controller PCB and the Main Controller PCB occurred.
Remedy: 1. Check the connector connection between the Engine Controller PCB and the Main Controller PCB. 2. Install the set of the controller firmware. 3. Replace the Main Controller PCB. 4. Replace the Engine Controller PCB.
Code: E743-0000
Description: DDI communication error
Causes: Software sequence error
Remedy: 1. Turn OFF and then ON the main power.
Code: E805-0005
Description: Sub Fan error
Causes: The Sub Fan was locked for a specified consecutive period of time.
Remedy: 1. Check the connection of the Sub Fan. 2. Replace the Sub Fan.
Code: E806-0000
Description: Main Fan error
Causes: The Main Fan was locked for a specified consecutive period of time.
Remedy: 1. Check the connection of the Main Fan. 2. Replace the Main Fan.
Code: E808-0000
Description: Low-voltage power supply failure detection
Causes: Printer detected low-voltage power supply failure.