• Code: 584
• Description: Fusing unit rotation error
  The fusing belt sensor does not detect a change in the fusing unit actuator for 0.5 seconds.
• Causes: • Defective fusing/paper exit motor • Deformed actuator for the fusing belt sensor • Defective fusing belt sensor • Broken connection between IH inverter and IOB • Incorrectly set fusing unit
• Remedy: 1. Check if the fusing unit is correctly set. 1. Check or replace the actuator for fusing belt sensor. 2. Replace the fusing belt sensor. 3. Replace the IH inverter. 4. Check the connection between IH inverter and IOB.

• Code: 585
• Description: IH coil unit full power (1250W) error
  The IH coil unit full power (1250W) continues for 220 seconds or more.
• Causes: • Defective IH inverter • Defective BCU • Defective IOB • Broken connection between IH inverter and IOB • Defective thermopile
• Remedy: 1. Replace the IH inverter. 2. Replace the BCU. 3. Replace the IOB. 4. Check the connection between IH inverter and IOB. 5. Replace the thermopile.

• Code: 586
• Description: IH coil unit rare short error
  The IH inverter detects an unusual current (high current) in the IH coil unit.
• Causes: • Defective IH coil unit • Defective IH inverter
• Remedy: 1. Replace the IH coil unit. 2. Replace the IH inverter.

• Code: 587
• Description: IH inverter high temperature error
  The IH inverter detects a high temperature near Q5 (power control circuit on the IH inverter).
• Causes: • Defective IH inverter • Defective IH inverter fan • Clogged IH inverter fan intake at the right rear cover • Incorrect input paper type to the machine
• Remedy: 1. Check or clean the IH inverter fan intake. 2. Set the correct paper type on the operation panel. 3. Replace the IH inverter. 4. Replace the IH inverter fan.

• Code: 610
• Description: Mechanical counter error: Bk
  This SC is only for NA models. The machine detects the mechanical counter error when SP5987-001 is set to "1".
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy: 1. Check or replace the mechanical counter.

• Code: 611
• Description: Mechanical counter error: FC
  This SC is only for NA models. The machine detects the mechanical counter error when SP5987-001 is set to "1".
• Causes: • Disconnected mechanical counter • Defective mechanical counter
• Remedy: 1. Check or replace the mechanical counter.

• Code: 620
• Description: ARDF communication error
  After the ARDF is detected, the break signal occurs or communication timeout occurs.
• Causes: • Incorrect installation of ARDF • ARDF defective • IPU board defective • External noise
• Remedy: 1. Check the cable connection of the ARDF. 2. Shut out the external noise. 3. Replace the ARDF. 4. Replace the IPU board.

• Code: 621
• Description: Finisher communication error
  While the IOB communicates with an optional unit, an SC code is displayed if one of following conditions occurs. • The IOB receives the break signal which is generated by the peripherals only just after the main switch is turned on. • When the IOB does not receive an OK signal from a peripheral 100ms after sending a command to it. The IOB resends the command. The IOB does not receive an OK signal after sending the command 3 times.
• Causes: • Cable problems • IOB problems • BCU problems • PSU problems in the machine • Main board problems in the peripherals
• Remedy: 1. Check if the cables of peripherals are correctly connected. 2. Replace the PSU if no power is supplied to peripherals. 3. Replace the IOB or main board of peripherals. 4. Replace the BCU.