Causes: A communication error between the Engine Controller PCB and the Main Controller PCB occurred.
Remedy: 1. Check the harness/connector between the Engine Controller PCB (UN1) and the Main Controller PCB (UN30). 2. Install the set of controller firmware. 3. Replace the Main Controller PCB (UN30). 4. Replace the Engine Controller PCB (UN1).
Code: E736-0000
Description: Fax communication error
Causes: Communication error with the CCU/modem.
Remedy: 1. Check the connection of the NCU PCB (UN38). 2. Replace the NCU PCB (UN38). 3. Replace the Main Controller PCB (UN30).
Code: E736-0001
Description: Error in ROM for backing up fax data
Causes: An error occurred in the ROM for backing up fax data.
Remedy: 1. Check the connection of the NCU PCB (UN38). 2. Replace the NCU PCB (UN38). 3. Replace the Main Controller PCB (UN30).
Code: E743-0000
Description: DDI communication error
Causes: Software sequence error
Remedy: 1. Turn OFF and then ON the power.
Code: E744-0001
Description: Invalid combination of language file versions
Causes: The language file version did not match that of the main program.
Remedy: 1. Update the firmware.
Code: E744-0002
Description: Language file error
Causes: The size of the language file exceeded the allowed size.