• Code: 440
• Description: Main motor error
  A main motor lock signal was not detected within 2 sec. after the main motor turned on.
• Causes: • Main motor overload A main motor lock signal was not detected • Main motor drive board defective

• Code: 442
• Description: New PCU error
  The new unit detection sensor switched ON for 2 sec. to detect a new PCU while the main motor was operating but the sensor did not go OFF.
• Causes: • New unit detection sensor defective • New PCU defective Note: Normally the new unit detection sensor goes on after a new PCU is installed and then goes off after the ID sensor and TD sensor have been initialized.

• Code: 450
• Description: Feed Development Motor Error
  The PLL lock signal remained LOW for 2 s while the feed development motor was operating.
• Causes: • Motor lock caused by overload. • Motor drive board defective.

• Code: 490
• Description: Exhaust fan motor lock
  An exhaust fan motor lock signal was not detected within 5 sec. after the exhaust fan motor turned on.
• Causes: • Fan motor overloaded due to an obstruction • Exhaust fan motor connector or harness loose, broken, defective

• Code: 492
• Description: PCB cooling fan motor lock
  A lock signal for the PCB cooling fan motor lock signal was not detected within 5 seconds after the cooling fan motor turned on.
• Causes: • Fan motor overloaded due to an obstruction. • Fan motor connector or harness loose, broken, defective

• Code: 501
• Description: 1st tray lift malfunction
  The paper height sensor did not activate after the tray lift motor was on for 10 sec. Note: Normally, if the power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the paper height sensor should de-activate within 5 sec. after the paper bottom plate starts to drop. If it does not deactivate within 5 sec. after four attempts, a message will prompt the user to reset Tray 1. After two attempts to release the error by re-setting the paper tray, if this does not solve the problem then this SC is displayed.
• Causes: • Lift motor connector or harness loose, broken, defective. • Lift motor defective • Height sensor connector or harness loose, broken, defective • Height sensor defective • Loose paper or other obstruction between the tray and motor • Pick-up solenoid connector or harness loose, broken, or defective • Pick-up solenoid defective

• Code: 502
• Description: 2nd tray lift malfunction
  The paper height sensor did not activate after the tray lift motor was on for 10 sec. Note: Normally, if the power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the paper height sensor should de-activate within 5 sec. after the paper bottom plate starts to drop. If it does not deactivate within 5 sec. after four attempts, a message will prompt the user to reset Tray 1. After two attempts to release the error by re-setting the paper tray, if this does not solve the problem then this SC is displayed.
• Causes: • Lift motor connector or harness loose, broken, defective. • Lift motor defective • Height sensor connector or harness loose, broken, defective • Height sensor defective • Loose paper or other obstruction between the tray and motor • Pick-up solenoid connector or harness loose, broken, or defective • Pick-up solenoid defective

• Code: 503
• Description: 3rd tray lift malfunction (optional paper tray unit)
  The paper height sensor is not activated after the tray lift motor has been on for 13 seconds. Note: Normally, if the power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the paper height sensor should de-activate within 5 seconds after the paper bottom plate starts to drop. If it does not deactivate within 5 s after four attempts, the tray lift motor halts. After two attempts to re-set the paper tray, if this does not solve the problem, then this SC is displayed and tray control halts.
• Causes: • Lift motor connector or harness loose, broken, defective. • Lift motor defective • Height sensor connector or harness loose, broken, defective • Height sensor defective