• 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: 1. Replace the ventilation fan (at the left side of the machine) motor-front or rear. 2. Replace the IOB.

• 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.

• Code: 535
• Description: Paper exit fan error
  The machine does not detect the fan motor lock signal for 2 seconds while the paper exit fan turns on.
• Causes: • Disconnected harness • Overload on the paper exit fan motor • Defective paper exit motor • Defective IOB
• Remedy: 1. Check or replace the harness. 2. Replace the paper exit fan. 3. Replace the IOB.

• Code: 536
• Description: Third duct fan error
  The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
• Causes: • Defective controller fan motor
• Remedy: 1. Replace the controller fan motor. 2. Replace the IOB.

• Code: 540
• Description: Fusing/Paper exit motor error
  The IOB does not receive the lock signal 10 seconds after turning on the fusing/ paper exit motor.
• Causes: • Motor overload • Defective fusing/paper exit motor
• Remedy: 1. Check the motor operation with SP5804-031 to -036. Replace the 24V fuse on the PSU if fusing/paper exit motor does not operate. 2. Replace the fusing/paper exit motor.

• Code: 541
• Description: Heating roller thermopile error
  The temperature measured by the heating roller thermopile does not reach 0°C for 6 seconds
• Causes: • Loose connection of the heating roller thermopile • Defective heating roller thermopile • Defective thermopile
• Remedy: 1. Check if the heating roller thermopile is firmly connected. 2. Replace the heating roller thermopile.