• Code: 547
• Description: Zero cross signal error
  One of the following occurred: 1) The fusing relay remained off for 50 ms after power on and continued to remain off after the after 3 attempts to detect the zero-cross signal. 2) During 11 zero-cross signal detections, two zero-cross signal detections were below 44 Hz. 3) The zero-cross signal could not be detected within 3 sec. after the fusing relay switched on.
• Causes: • Switch the main switch off and on • Defective fusing relay, replace the PSU

• Code: 548
• Description: Fusing unit installation error
  The machine cannot detect the fusing unit when the front cover and right cover are closed.
• Causes: • Fusing unit is not installed • Fusing unit connection loose

• Code: 557
• Description: Zero-cross frequencyover
  The applied power ac frequency was detected less than 66 Hz more than 10 times, or less than 44 Hz one time.
• Causes: • Nose on the ac power line

• Code: 559
• Description: Fusing unit jam
  The fusing exit sensor detected a fusing unit paper late jam three times. The paper was late and the fusing exit sensor could not detect the paper three times.
• Causes: • Remove the paper that is stopped in the fusing unit. • Check that the fusing unit is clean and has no obstacles in the paper feed path. • If the error persists, replace the fusing unit

• Code: 599
• Description: 1-Bin tray motor lock
  A 1-bin tray motor lock signal is not detected for more than 300 ms during rotation.
• Causes: • 1-bin tray motor locked from overload • 1-bin tray motor defective • 1-bin tray motor connection loose

• Code: 601
• Description: Communication error between BICU and scanner unit
  Within 800 ms after power on, after 3 attempts the BICU does not communicate with the SIB via the serial line.
• Causes: • Serial line connecting the BICU and SIB defective • External noise on the serial line • SIB board defective • BICU board defective

• Code: 610
• Description: Communication timeout error between BICU and ADF
  The BICU cannot receive a response within 100 ms after 3 attempts after sending data to the ARDF.
• Causes: • BICU board and ADF main board serial line connection defective • External noise • ADF main board defective • BICU board defective

• Code: 611
• Description: Communication break error between BICU and ADF
  The BICU receives a break signal from the ADF main board.
• Causes: • Serial line connecting BICU and ADF unstable • External noise • ADF main board defective • BICU board defective