• Code: SC570
• Description: Development intake fan error
  Fan motor not operating correctly.
• Causes: • Fan harness loose, broken, defective • Fan overload due to physical obstruction • Fan motor defective

• Code: SC571
• Description: Ozone exhaust fan (FC) error
  The fan of the middle ozone filter box not operating correctly.
• Causes: • Fan harness loose, broken, defective • Fan overload due to physical obstruction • Fan motor defective

• Code: SC572
• Description: Ozone exhaust fan (K) error
  The fan of the lower ozone filter box not operating correctly.
• Causes: • Fan harness loose, broken, defective • Fan overload due to physical obstruction • Fan motor defective

• Code: SC573
• Description: Ozone intake fan error
  The ozone filter intake fan not operating correctly.
• Causes: • Fan harness loose, broken, defective • Fan overload due to physical obstruction • Fan motor defective

• Code: SC574
• Description: Y thermistor error The thermistor near the Y PCU has short circuited or otherwise not operating correctly.
• Causes: • Harness loose, broken, defective • Thermistor defective

• Code: SC599
• Description: Tray 1 lift motor error
  An error was detected in the operation of the lift motor for Tray 1 (tandem tray).
• Causes: • Motor harness loose, broken, defective • Motor overload due to an obstruction • Motor defective

• Code: SC620
• Description: ARDF communication error
  A BREAK signal occurs after the machine detects the ARDF, or a communication timeout occurs.
• Causes: • ARDF disconnected • VBCU board harness disconnected, defective • VBCU board defective • Spurious noise from the power supply line • ARDF defective

• Code: SC621
• Description: Mailbox-to-Finisher communication error
  Communication between the mailbox and finisher is interrupted. An ACK/NCK signal was not received within 100 ms after a data frame is sent and 3 retries failed.
• Causes: • Connection cable between mailbox and finisher disconnected, defective • Finisher main board defective • VBCU defective • PSU defective