• Code: 504-01
• Description: Tray 4 error (Paper Feed Unit or LCT)
  For the two-tray paper feed unit When the tray lift motor is turned on, the upper limit is not detected within 10 seconds. If this condition occurs three consecutive times, the SC is generated. For the LCT If the upper or lower limit is not detected within 8 seconds when the tray lift motor is turned on to lift up or lower the tray
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.

• Code: 504-02
• Description: Tray 4 error (3 Tray Paper Feed Unit)
  This SC is generated if the following condition occurs 3 consecutive times. For the two-tray paper feed unit • When the tray lowers, the tray lift sensor does not go off within 1.5 sec. For the LCT • If the upper limit does not go off for 1.5 seconds even the tray lift motor turns on to lower the tray after the upper limit has been detected at power on.
• Causes: • Defective tray lift motor or connector disconnection • Defective lift sensor or connector disconnection
• Remedy: 1. Check the cable connections. 2. Check and/or replace the defective component.

• Code: 529
• Description: Junction gate 1 motor error
  The junction gate 1 HP sensor does not detect the home position of junction gate 1 for 0.15 seconds when the machine starts to detect its home position. The junction gate 1 HP sensor does not turn off for 0.1 seconds after the machine has detected its home position.
• Causes: • Disconnected or defective junction gate 1 motor • Disconnected or defective junction gate 1 HP sensor • Mechanical problem (such as paper jam etc.) • Shorted 24 V fuse on the PSU • Defective IOB
• Remedy: 1. Remove any objects that obstruct junction gate 1. 2. Replace the junction gate 1 HP sensor. 3. Replace the junction gate 1 motor. 4. Replace the 24 V fuse on the PSU. 5. Replace the IOB.

• Code: 530
• Description: Fusing fan error
  The IOB does not receive the lock signal 10 seconds after turning on the fusing fan.
• Causes: • Defective fusing fan motor or connector disconnection • Defective IOB
• Remedy: Check the connector and/or replace the fusing fan motor.

• Code: 531
• Description: Ventilation fan (at the left side of the machine) motor-front/rear error
  The IOB does not receive the lock signal for 2 seconds after turning on the ventilation fan motor-front/rear.
• Causes: • Defective ventilation fan motor-front or rear
• Remedy: Replace the ventilation fan (at the left side of the machine) motor-front or rear.

• Code: 532
• Description: IH coil fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the IH coil fan turns on.
• Causes: • Disconnected harness • Overload on the IH coil fan motor • Defective IH coil fan motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the IH coil fan. 3. Replace the IOB

• Code: 533
• Description: IH inverter fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the IH inverter fan turns on.
• Causes: • Disconnected harness • Overload on the IH inverter fan motor • Defective IH inverter fan motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the IH inverter fan. 3. Replace the IOB

• Code: 534
• Description: Second duct fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the second duct fan turns on.
• Causes: • Disconnected harness • Overload on the second duct fan motor • Defective second duct motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the second duct fan. 3. Replace the IOB