• Code: SC23-21
• Description: Toner pump motor (M28) abnormality. The blowout of a fuse for the toner pump motor (M28) in the printer control board (PRCB) is checked. While the M28 is rotating, an error detection signal (abnormal rotation) is detected for more than 1 second. At this time, an error detection signal (blowout of a fuse) is detected, but an error signal (24V cut off) is not detected.
• Causes: Printer control board (PRCB) Toner pump motor (M28)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC23-22
• Description: Toner pump motor (M28) abnormality. The rotation of the toner pump motor (M28) is checked. While the M28 is rotating, an error detection signal (abnormal rotation) is detected for more than 1 second. At this time, error signals (blowout of a fuse and 24V cut off) are not detected.
• Causes: Toner pump motor (M28) Pump encoder sensor /1 (PS28)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC23-24
• Description: Air pump motor (M29) abnormality. The rotation of the air pump motor (M29) and the 24V power source are checked. While the M29 is rotating, an error detection signal (abnormal rotation) is detected for more than 1 second. At this time, an error signal (24V cut off) is detected.
• Causes: DC power supply /2 (DCPS/ 2) Air pump motor (M29)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC23-25
• Description: Air pump motor (M29) abnormality. The blowout of a fuse for the air pump motor (M29) in the printer control board (PRCB) is checked. While the M29 is rotating, an error detection signal (abnormal rotation) is detected for more than 1 second. At this time, an abnormality signal (blowout of a fuse) is detected, but no abnormality signal (24V cut off) is detected.
• Causes: Printer control board (PRCB) Air pump motor (M29)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC23-26
• Description: Air pump motor (M29) abnormality. The rotation of the air pump motor (M29) is checked for more than 1 second. An error detection signal (abnormal rotation) is detected for more than 1 second. At this time, error signals (blowout of a fuse and 24V cut off) are not detected.
• Causes: Air pump motor (M29) Pump encoder sensor (PS29) Load of the pump
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC24-01
• Description: When the change in temperature of the drum temperature sensor (TH5) is less than -2°C a specified period of time after the main power switch (SW1) turns ON to start the control of the dehumidification heater /1 (HTR1) and the drum temperature is below 10°C after the elapse of 1 minute.
• Causes: Drum temperature sensor (TH5)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC24-02
• Description: When the main power switch (SW1) turns ON with the fusing temperature below 50°C, the detected temperature of the drum temperature sensor (TH5) is more than 52°C, and when the detected temperature is above 52°C after a specified period of time.
• Causes: Drum temperature sensor (TH5)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).

• Code: SC28-01
• Description: A charge leak is detected. After a charge error detection signal is detected while in the charge ON, up to 5 charge ON/OFF operations occur in succession while in 10 prints.
• Causes: Charger Power feeding contact High voltage unit /1 (HV1)
• Remedy: The main body stops immediately to turn OFF the RL1 (main).