• Code: 899
• Description: CU Disconnect
  In the situation that communication between CU and SU was able to establish, SU FW detected that CU FW had disappeared from a communications path (an USB line).
• Remedy: Is the cable from the belt thermistor to the CU/PU board connected properly? Does the error occur again?
  Connect the cable properly. Turn off and on the MFP. Replace the belt thermistor.

• Code: 901 ... 904
• Description: Belt temperature error
  901: Short circuit
  902: Open circuit
  903: High temperature
  904: Low temperature
• Remedy: Is the cable from the belt thermistor to the CU/PU board connected properly? Does the error occur again?
  Connect the cable properly. Turn off and on the MFP. Replace the belt thermistor.

• Code: 918
• Description: An alarm of Duplex Fan was detected.
• Remedy: An error of a fan inside the Duplex. Is it reproduced by turning on thepower unit?
  Review whether or not the Duplex is installed properly. Review whether or not the fan is installed properly. Replace the fan.

• Code: 923
• Description: A lock error with black image drum
  The image drum does not revolve properly.
• Remedy: The image drum does not revolve properly. Does the error display is provided again by turning off and on the MFP?
  Be sure the image drum is properly installed properly. Replace the image drum unit. Replace the image drum motor.

• Code: 928
• Description: Fuser motor lock error
• Remedy: The fuser does not operate properly? Does the error occur again?
  Check that the fuser is properly installed. Replace the fuser. Replace the fuser motor.

• Code: 933
• Description: Tray-2 CPU clock frequency error
• Remedy:

• Code: 941, 942, 943, 944
• Description: PU Error
  A PU error was detected.
  941 : Watch Doc Timer Error
  942 : Detection of Unassigned Interruption
  943 : CPU Error Detection 944 : Dcon Access Error
• Remedy: Turn off and on the MFP. When this error occurs again, replace the CU/ PU board.

• Code: 980
• Description: Media jamming error around fuser.
  Media is jammed by entangling around the fuser.
• Remedy: Turn off the MFP. Replace the fuser.