• Code: 111
• Display: Contact the Service center. 111: Error
• Description: Duplex unit for other model is detected.
• Remedy: Is the duplex unit for that specific model installed? No Install the correct duplex unit.

• Code: 112, 113
• Display: Contact the Service center. 112: Error 113: Error
• Description: Optional tray for other model is detected.
• Remedy: Is the optional tray for that specific Model installed? No Install the correct optional tray.

• Code: 121
• Display: Contact the Service center. 121: Error
• Description: High voltage power supply interface error
• Remedy: Is the cable connecting the PU board to the high voltage unit connected normally? Have you checked defective contact of contactor points?
  Re-connect them normally. Check for defective contact of the high voltage system. Replace the high voltage power supply.

• Code: 122
• Display: Contact the Service center. 122: Error
• Description: Low voltage power supply fan error
• Remedy: Is the fan (bottom right of the front) of the low voltage power supply block working? Is the fan connector connected correctly?
  Check for sure connection of the fan connector. Replace the PU board. Replace the fan motor. Replace the PU board.

• Code: 123
• Display: Contact the Service center. 123: Error
• Description: Environment humidity is abnormal./ Humidity sensor is not connected.
• Remedy: Does this error recur? Yes Turn off the power of the printer and back on. Replace the control panel board.

• Code: 124
• Display: Contact the Service center. 124: Error
• Description: Environment temperature is abnormal.
• Remedy: Does this error recur? Yes Turn off the power of the printer and back on. Replace the control panel board.

• Code: 126
• Display: Shut off the electric power and wait for a while. 126: The printer is condensing.
• Description: Dew condensation of the printer is detected.
• Remedy: This error can easily occur when a printer is brought in to indoor from outdoor. Leave the printer for 2 hours or half day under room temperature, and turn on the power again. After leaving a printer under room temperature, turn on the power again.
  

• Code: 127
• Display: Contact the Service center. 127: Error
• Description: Fuser exhaust fan error
• Remedy: Is the fan connector connected normally? Does this error recur?
  Re-connect it normally. Replace the fan motor. Replace the PU board.