• Code: 498
• Description: Temperature and humidity sensor error 2
  Thermal sensor output error: If the output value is 0.5 V or lower or 3.0 V or higher, it is judged as a sensor error and the presumptive temperature, 23C, is applied. Humidity sensor output error: If the output value is 2.4V or higher, it is judged as a sensor error and the presumptive humidity, 50 % RH, is applied. If a sensor error is judged to have occurred to the thermal sensor or humidity sensor three times consecutively, the machine issues SC498-00. * However, if the power is switched off and then back on, the machine resumes its attempt to use the sensor. * If the thermal sensor or humidity sensor remains capable of normal operation even after the SC is issued, the capable sensor will keep operating.
• Causes: Loose connection/harness disconnected. Defective sensor.
• Remedy: • Reconnect to the connector. • Check the harness.

• Code: 501
• Description: Paper Tray 1 error
  When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection. Motor overload. Defective motor. Loose connection. Broken harness. Defective IOB. Too much paper in the tray. Paper or other material is jammed in the parts between the tray and motor.
• Remedy: • Replace the motor. • Reconnect the connector. • Replace the harness. • Replace the IOB.

• Code: 502
• Description: Paper Tray 2 error
  When the tray lift motor rotates counterclockwise, (if the upper limit is not detected within 10 seconds), the machine asks the user to reset the tray. When the tray lift motor rotates clockwise, (if the upper limit is not detected within 1.5 seconds), the machine asks the user to reset the tray. If one of these conditions occurs three consecutive times, the SC is generated.
• Causes: Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection. Motor overload. Defective motor. Loose connection. Broken harness. Defective IOB. Too much paper in the tray. Paper or other material is jammed in the parts between the tray and motor.
• Remedy: • Replace the motor. • Reconnect the connector. • Replace the harness. • Replace the IOB.

• Code: 503
• Description: Tray 3 error (Paper Feed Unit or LCT)
  An error code is issued from the paper bank unit.
• Causes: (A model other than D581) Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection. (D581) Defective stack transport clutch or connector disconnection. Transfer motor error/disconnection. Defective end fence home position sensor or connector disconnection. Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection. Pickup SOL error/disconnection. Right tray sensor error/disconnection.
• Remedy: Turn the main power switch off and on.

• Code: 504
• Description: Tray 4 error (Paper Feed Unit or LCT)
  An error code is issued from the paper bank unit.
• Causes: The 2nd tray of D580, 1st tray of D580 when D579 and D580 are attached, the bottom D579 when two units of D579 are attached, or D631 when D581 and D631 are attached. Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection D581 when D579 and D581 are attached.Defective stack transport clutch or connector disconnection. Transfer motor error/disconnection. Defective end fence home position sensor or connector disconnection. Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection. Pickup SOL error/disconnection. Right tray sensor error/disconnection.
• Remedy: Turn the main power switch off and on.

• Code: 505
• Description: Tray 5 error (Optional Paper Feed Unit or LCT)
  An error code is issued from the paper bank unit.
• Causes: The 2nd tray of D580 when D579 and D580 are attached, or D631 when D580 and D631 are attached. Defective tray lift motor or connector disconnection. Defective upper limit sensor or connector disconnection.
• Remedy: Turn the main power switch off and on.

• Code: 520-01
• Description: Registration motor error
  A registration error is detected 50 times consecutively at intervals of 10 ms
• Causes: Motor overload. Defective motor. Loose connection. Broken harness. Defective IOB. Defective encoder.
• Remedy: • Replace the motor. • Reconnect the connector. • Replace the harness. • Replace the IOB.

• Code: 520-02
• Description: Paper feed motor error
  A registration error is detected 50 times consecutively at intervals of 10 ms
• Causes: Motor overload. Defective motor. Loose connection. Broken harness. Defective IOB. Defective encoder.
• Remedy: • Replace the motor. • Reconnect the connector. • Replace the harness. • Replace the IOB.