• Code: 798-4
• Description: Switchback Roller HP Sensor (S11) Error PB (D391) The switchback roller HP sensor did not go ON within the prescribed time after the motor turned on to raise the roller through an arc of 40 degrees. -or- The switchback roller HP sensor did not go OFF within the prescribed time when the motor turned on to lower the roller through an arc of 20 degrees.
• Causes: • Switchback Roller HP Sensor (S11) defective • Switchback Roller Motor (M7) defective • Sensor or motor connector loose, broken, defective
• Remedy:

• Code: 798-5
• Description: Stacking Tray Lower Limit Sensor (S7) Error PB (D391) The stacking tray lower limit sensor did not go ON within the prescribed time when the stacking tray lift motor turned on to lower the tray. -or- The stacking tray lower limit sensor did not go OFF within the prescribed time when the stacking tray lift motor turned on to raise the tray 30 mm.
• Causes: • Stacking Tray Lower Limit Sensor (S7) defective • Stacking Tray Lift Motor (M2) defective • Sensor or motor connector loose, broken, defective
• Remedy:

• Code: 798-6
• Description: Paper Detection Sensor: Front/Rear (S1/S2) PB (D391) The paper detection sensor at the front of the stacking tray did not go ON within the prescribed time after the stacking tray overflow sensor (S6) went ON and the stacking tray lift motor turned on to raise the tray. -or- The paper detection sensor at the front of the stacking tray did not go OFF within the prescribed time when the stacking tray lift motor turned on to lower the tray. -or- The paper detection sensor at the rear of the stacking tray did not go ON within the prescribed time after the stacking tray overflow sensor (S6) went ON and the stacking tray lift motor turned on to raise the tray. -or- The paper detection sensor at the rear of the stacking tray did not go OFF within the prescribed time when the stacking tray lift motor turned on to lower the tray.
• Causes: • Paper Detect Sensor: Front (S1) defective • Stacking Tray Lift Motor (M2) defective
• Remedy:

• Code: 798-7
• Description: Stacking Tray Overflow Sensor (S6) Error PB (D391) The stacking tray overflow sensor did not go ON within the prescribed time when the stacking tray lift motor turned on to raise the tray 70 mm. -or- The stacking tray overflow sensor did not go OFF within the prescribed time after the stacking tray lift motor turned on to lower the tray so paper could be removed from the tray by the operator.
• Causes: • Stacking Tray Overflow Sensor (S6) defective • Stacking Tray Lift Motor (M2) defective • Sensor or motor connector loose, broken, defective
• Remedy:

• Code: 798-8
• Description: Stacking Tray HP Sensor (S9) Error PB (D391) The stacking tray HP sensor did not go ON within the prescribed time when the stacking tray motor turned on to move the tray toward the sensor. -or- The stacking tray HP sensor did not go OFF when the stacking tray motor turned on to move the tray away from the sensor.
• Causes: • Stacking HP Sensor (S9) defective • Stacking Tray Motor (M9) defective • Sensor or motor connector loose, broken, defective
• Remedy:

• Code: 798-9
• Description: Stacking Weight HP Sensor (S16) Error PB (D391) The stacking weight HP sensor did not go ON within the prescribed time when the stacking weight motor turned on to move the tray toward the sensor. -or- The stacking weight HP sensor did not go OFF within the prescribed time when the stacking tray motor turned on to move the tray away from the sensor.
• Causes: • Stacking Weight HP Sensor (S16) defective • Stacking Weight Motor (M6) defective • Sensor or motor connector loose, broken, defective
• Remedy:

• Code: 816
• Description: Energy saving I/O sub-system error The energy saving I/O sub-system detects an error.
• Causes: • Controller board defective
• Remedy: Replace the controller board.

• Code: 817
• Description: Boot loader error The boot loader cannot read one of the following: self-diagnostic module, kernel, or one of the files of the root file system, or the check of one of these items on the system SD card failed.
• Causes: • File or module on the system SD card is corrupted • File or module on the system SD card is illegal • Make sure that the system SD card is the one designed for the machine • Replace controller board.
• Remedy: