• Code: 114
• Description: Detected illegal 4th Tray.
• Remedy: Is a 4th Tray provided for this model installed? No Install a correct 4th Tray.

• Code: 121
• Description: High-voltage power supply I/F error.
• Remedy: Is cable between PU board and high-voltage power unit connected properly? Is there no improperly connections? No Yes No Connect properly. Check improper connections for high-voltage. Replace the higevoltage power supply.

• Code: 122
• Description: Low-voltage power supply FAN error. Low-voltage power supply temperature 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 connections for connector of the FAN. Replace the lowvoltage power supply. Replace the FAN. Replace the lowvoltage power supply.

• Code: 123
• Description: Abnormal environment humidty /Not connected humidity sensor.
• Remedy: Does error reoccur? Yes Power Off/On. Replace the control panel board (PCQ board).

• Code: 124
• Description: Abnormal environment temperature.
• Remedy: Does error reoccur? Yes Power Off/On. Replace the control panel board (PCQ board).

• Code: 126
• Description: Condensation in the printer was detected.
• Remedy: Condensation iss likely to occur in printers carried from the outside. Turn on the printer again after it is exposed to room temperature for two hours to half a day. Does the error reoccur? Yes After leaving the printer at room temperature, turn on the power again. Replace the control panel board (PCQ board).

• Code: 127
• Description: Error detected at the fuser unit cooling FAN.
• Remedy: Is the FAN connector connected properly? Does error reoccur?
  Connect properly again. Replace the FAN motor. Replace the PU/ CU board

• Code: 128
• Description: Error detected at the engine FAN motors. 05: Fuser side FAN 08: REAR FAN 0B: ID FAN 2
• Remedy: Is the FAN connector connected properly? Does error reoccur?
  Connect properly again. Replace the FAN motor. Replace the PU/ CU board.