• Code: 559
• Description: Consecutive fusing unit paper jams
  Three consecutive paper jams occurred in the fusing unit. The paper jam counter for the fusing unit reaches 3 times. The paper jam counter clears after the paper feeds correctly. Note: This SC is issued only if SP1159 is set to "1".
• Causes: • Paper jam in the fusing unit.
• Remedy: 1. Remove the paper jam in the fusing unit. 2. Make sure that the paper path in the fusing unit is clear.

• Code: 590
• Description: Exhaust fan motor error
  The CPU detects an exhaust fan lock signal consecutively 200 ms.
• Causes: • Poor connection of the exhaust fan motor • Too much load on the motor drive
• Remedy: 1. Check the connection of the exhaust fan motor. 2. Check for blockages in the motor drive mechanism.

• Code: 620
• Description: Communication error between IPU and ADF
  A break occurred in the connection between the IPU and ADF
• Causes: • Finisher serial cable connection loose, broken • BCU defective • Finisher main 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 BCU 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.

• Code: 622
• Description: Paper tray unit 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.

• Code: 632
• Description: Counter device error 1
  After 3 attempts to send a data frame to the optional counter device via the serial communication line, no ACK signal was received within 100 ms.
• Causes: • Serial line between the optional counter device, the relay board and copier control board is disconnected or damaged • Make sure that SP5113 is set to enable the optional counter device.
• Remedy: Check the connection between the main machine and optional counter device.

• Code: 633
• Description: Key/card counter device error 2
  During communication with the device, the MCU received a break (Low) signal.
• Causes: • Serial line from the device to the main machine is unstable, disconnected, or defective
• Remedy: 1. Check if the setting of the SP5113 is correctly set. 2. Check the connection between the main machine and optional counter device.

• Code: 634
• Description: Key/card counter device error 3
  The backup battery of the counter device RAM is low.
• Causes: • RAM backup battery exhausted • Counter device defective
• Remedy: Replace the counter device.