• Code: C3723
• Description: Fusing abnormally high temperature detection (pressurizing side)
  • The fusing pressure roller thermistor continues to detect a temperature higher than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, MFPB and DCPU for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change DCPU.

• Code: C3724
• Description: Fusing abnormally high temperature detection (soaking side)
  • The soaking roller thermistor/1 continues to detect a temperature higher than a predetermined one for a predetermined period of time. • The signal is turned ON to activate the hard ratchet on the soaking side.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, MFPB and DCPU for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change DCPU.

• Code: C3725
• Description: Fusing abnormally high temperature detection (NS sensor)
  • The NC sensor continues to detect a temperature higher than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, MFPB and REDB for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change REDB.

• Code: C3822
• Description: Fusing abnormally low temperature detection (Edge of the heating roller)
  • The heating roller thermistor/2 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, PRCB and REDB for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change REDB.

• Code: C3823
• Description: Fusing abnormally low temperature detection (pressurizing side)
  • The fusing pressure roller thermistor continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, PRCB and DCPU for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change DCPU.

• Code: C3824
• Description: Fusing abnormally low temperature detection (soaking side)
  • The soaking roller thermistor/1 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, PRCB and DCPU for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change DCPU.

• Code: C3825
• Description: Fusing abnormally low temperature detection (NC sensor)
  • The NC sensor continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, PRCB and REDB for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change REDB.

• Code: C3921
• Description: Fusing sensor wire breaks detection (Center of the heating roller)
  • At the warm-up stage, the heating roller thermistor/3 voltage does not decrease by predetermined steps (temperature rise) within a predetermined time.
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the upper right door. 3 Check the fusing unit, IHPU, PRCB and REDB for proper connection and correct or change as necessary. 4 Change fusing unit. 5 Change IHPU. 6 Change PRCB. 7 Change REDB.