• 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.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) IH power supply (IHPU) Relay drive board (REDB) 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, PRCB and REDB for proper connection and correct or change as necessary. 4 Change TEMS1 (C3825) 5 Change fusing unit 6 Change IHPU 7 PRCB ICP17 conduction check 8 Change PRCB 9 Change REDB

• 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.
• Causes: Fusing unit IH power supply (IHPU) DC power supply (DCPU) 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, 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 heating roller temperature sensor/1 continues to detect a temperature lower than a predetermined one for a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) IH power supply (IHPU) Relay drive board (REDB) 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, PRCB and REDB for proper connection and correct or change as necessary. 4 Change TEMS1 (C3825) 5 Change fusing unit 6 Change IHPU 7 PRCB ICP17 conduction check 8 Change PRCB 9 Change REDB

• Code: C3921
• Description: Fusing sensor wire breaks detection (Center of the heating roller) • At the warm-up stage, the heating roller temperature sensor/2 voltage does not decrease by predetermined steps (temperature rise) within a predetermined time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, PRCB and REDB for proper connection and correct or change as necessary. 4 Change TEMS1, TEMS2 or TEMS3 5 Change fusing unit 6 Change IHPU 7 PRCB ICP17 conduction check 8 Change PRCB 9 Change REDB

• Code: C3922
• Description: Fusing sensor wire breaks detection (Edge of the heating roller) • At the warm-up stage, the heating roller temperature sensor/3 voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, PRCB and REDB for proper connection and correct or change as necessary. 4 Change TEMS1, TEMS2 or TEMS3 5 Change fusing unit 6 Change IHPU 7 PRCB ICP17 conduction check 8 Change PRCB 9 Change REDB

• Code: C3924
• Description: Fusing sensor wire breaks detection (soaking side) • At the warm-up stage, the soaking roller thermistor/1 voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: Fusing unit IH power supply (IHPU) DC power supply (DCPU) 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, 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: C3925
• Description: Fusing sensor wire breaks detection (NC sensor) • At the warm-up stage, the heating roller temperature sensor/1 voltage does not increase by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) Heating roller temperature sensor/2 (TEMS2) Heating roller temperature sensor/3 (TEMS3) IH power supply (IHPU) Relay drive board (REDB) 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, PRCB and REDB for proper connection and correct or change as necessary. 4 Change TEMS1, TEMS2 or TEMS3 5 Change fusing unit 6 Change IHPU 7 PRCB ICP17 conduction check 8 Change PRCB 9 Change REDB

• Code: C392A
• Description: Fusing sensor contamination (NC sensor) • While checking the contamination on the heating roller temperature sensor/1, detected temperature of the heating roller thermistor/1 exceeded the detected temperature of the heating roller temperature sensor/ 1 for over the predetermined value for the predetermined period of time.
• Causes: Fusing unit Heating roller temperature sensor/1 (TEMS1) IH power supply (IHPU) DC power supply (DCPU) Printer control board (PRCB)
• Remedy: 1 Wipe the TEMS1 clean of dirt if any. <Cleaning procedure> • Clear away a dirt or a foreign object on the sensor with a cotton swab. • When a dirt is left even if you cleaned the sensor by above procedure, clear away a dirt or a foreign object on the sensor using a cotton swab dampened with the alcohol. And, wipe off the sensor with a dry cotton swab afterwards. 2 Check the TEMS1 for installed position and proper connector connection. 3 Check the connection of the fusing unit. 4 Check the fusing unit, IHPU, PRCB and DCPU for proper connection and correct or change as necessary. 5 Change TEMS1 6 Change fusing unit 7 PRCB ICP17 conduction check 8 Change PRCB