• Code: E744
• Description: Language file/BootROM error
• Remedy: Upgrade the version of the Language file

• Code: E745
• Description: Token ring board error
• Remedy: Check on connection of the token ring board, Replace the token ring board

• Code: E746
• Description: Option board error
• Remedy: Replace with an appropriate UFR PCB. Replace with an appropriate main controller PCB (sub)

• Code: E747
• Description: Main controller PCB error (Image processing ASIC or memory control/communication control ASIC)
• Remedy: Turn the main power off and turn it back on. Disconnect and connect the main controller PCB Replace the main controller PCB (Main).

• Code: E748
• Description: Main controller PCB error (Image processing ASIC or memory control/communication control ASIC)
• Remedy: Disconnect and then connect the main controller PCB (Sub SJA/ PDRM-EF-A/RO-A), Clean the terminal, Replace the main controller PCB (Sub SJ-A/PDRM-EF-A/RO-A), Disconnect and then connect the open interface PCB, Clean the terminal, Replace the open interface PCB, Replace the main controller PCB (main)

• Code: E749
• Description: Restart in accordance with a change of the product configuration
• Remedy: Turn OFF and back ON the main power to recover. Recovered by turning the main power OFF / ON

• Code: E804-0000
• Description: Controller fan error
  Stop of power supply cooling fan was detected
• Remedy: Check the connection of power supply cooling fan, replace it

• Code: E804-0001
• Description: Controller fan error
  Stop of power supply cooling fan 2 was detected
• Remedy: Check the connection of power supply cooling fan 2, replace it