• Code: C3722
• Description: Fusing abnormally high temperature detection (Edge of the heating side). Detected temperature of the heating roller thermistor/1 (TH1) goes beyond a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Heating roller thermistor/1 (TH1) • IH power supply (IHPU) (bizhub 554e only) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit, IHPU (bizhub 554e only) and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace IHPU (bizhub 554e only) 6 Replace PRCB

• Code: C3725
• Description: Fusing abnormally high temperature detection (Main of the heating side). • Detected temperature of the heating roller temperature sensor (TEMS) goes beyond a given temperature for a given period of time consecutively. • The hard protector signal error is detected for a given period of time consecutively.
• Causes: • Fusing unit • Heating roller temperature sensor (TEMS) • IH power supply (IHPU) (bizhub 554e only) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit, IHPU (bizhub 554e only) and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace IHPU (bizhub 554e only) 6 Replace PRCB

• Code: C3726
• Description: Fusing abnormally high temperature detection (Center of the heating side). Detected temperature of the heating roller thermistor/2 (TH2) goes beyond a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Heating roller thermistor/2 (TH2) • IH power supply (IHPU) (bizhub 554e only) • Printer control board (PRCB)
• Remedy: 1 Check the fusing unit for correct installation (whether it is secured in position). 2 Check the open/close operation of the right door. 3 Check the fusing unit, IHPU (bizhub 554e only) and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace IHPU (bizhub 554e only) 6 Replace PRCB

• Code: C3822
• Description: Fusing abnormally low temperature detection (Edge of the heating roller) <bizhub 554e> The heating roller thermistor/1 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: • Fusing unit • Heating roller thermistor/1 (TH1) • IH power supply (IHPU) • Printer control board (PRCB)
• 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 and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit 5 Replace IHPU 6 Replace PRCB

• Code: C3825
• Description: Fusing abnormally low temperature detection (Main of the heating roller). The heating roller temperature sensor (TEMS) continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: • Fusing unit • Heating roller temperature sensor (TEMS) • IH power supply (IHPU) (bizhub 554e only) • Printer control board (PRCB)
• 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 (bizhub 554e only) and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace IHPU (bizhub 554e only) 6 PRCB ICP15 conduction check 7 Replace PRCB

• Code: C3826
• Description: Fusing abnormally low temperature detection (Center of the heating roller) <bizhub 454e> The heating roller thermistor/2 (TH2) continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: • Fusing unit • Heating roller thermistor/2 (TH2) • Printer control board (PRCB)
• 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 (bizhub 554e only) and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace IHPU (bizhub 554e only) 6 PRCB ICP15 conduction check 7 Replace PRCB

• Code: C3922
• Description: Fusing sensor wire breaks detection (Edge of the heating roller) After a predetermined period of time after the warm-up stage is started, the heating roller thermistor/1 (TH1) voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Heating roller thermistor/1 (TH1) • Printer control board (PRCB)
• 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 and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace PRCB

• Code: C3925
• Description: Fusing sensor wire breaks detection (Center of the heating roller). After a predetermined period of time after the warm-up stage is started, the heating roller temperature sensor (TEMS) voltage does not increase by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Heating roller temperature sensor (TEMS) • Printer control board (PRCB)
• 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 and PRCB for proper connection and correct or change as necessary. 4 Replace the fusing unit (bizhub 554e/bizhub 454e) 5 Replace PRCB