• Code: 106
• Description: Engine control logic error
• Remedy: Does the error occur again? Yes Turn off and on the MFP Replace the CU/PU board.

• Code: 111
• Description: Duplex unit for a different model was detected.
• Remedy: Is Duplex unit for the model installed? No Install a correct Duplex unit.

• Code: 112
• Description: The 2nd tray for a model different from the MFP was detected.
• Remedy: Is the 2nd tray for the MFP installed? No Install proper 2nd tray.

• Code: 121
• Description: High-voltage power supply interface error
• Remedy: Is the cable between the CU/ PU board and the highvoltage power unit connected properly? Is a contact faulty?
  Reconnect it properly. Check the highvoltage line for no poor connection. Replace the highvoltage power supply.

• Code: 122
• Description: Rear-fan error
• Remedy: Does the fan at the rear of the MFP operate? Is the connector of the fan connected properly?
  Be sure of the connection of the fan. Replace the CU/PU board. Connect the fan properly. Replace the CU/PU board.

• Code: 123
• Description: Ambient humidity error or non connection of humidity sensor
• Remedy: Is the cable from the CU/PU board to the toner sensor board connected properly?
  Re-connect it properly. Replace the toner sensor board.

• Code: 124
• Description: Ambient temperature error
• Remedy: Is the cable from the CU/PU board to the toner sensor board connected properly?
  Re-connect it properly. Replace the toner sensor board.

• Code: 126
• Description: Condensation on the device was detected.
• Remedy: Condensation is likely to form in such a case that a device is carried in from the outdoors. Leave the device untouched for two hours to a half day and turn on the power unit. Does the error occur again? Yes Leave the device untouched and turn on the power unit. Replace a control panel board.