• Code: 544
• Description: Fusing overheat error 2 (center) A fusing temperature over 250°C is detected at the center of the hot roller by the fusing temperature monitor circuit in the BCU board.
• Causes: • TRIAC short on PSU (PSU defective) • BICU board defective • Power supply voltage unstable
• Remedy:

• Code: 545
• Description: Heating roller fusing lamp consecutive full power 1 When the fusing unit is not running in the ready condition, the heating roller fusing lamp keeps on full power for 12 seconds.
• Causes: • Broken heating roller thermostat • Broken heating roller fusing lamp
• Remedy:

• Code: 547
• Description: Zero cross signal detection error Zero cross signals were not detected within the prescribed time.
• Causes: • PSU, BICU harness loose or broken • PSU defective
• Remedy:

• Code: 557
• Description: Zero cross waveform signal error The waveform of the zero cross signal was detected out of range.
• Causes: • Electrical noise on the power supply line
• Remedy:

• 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: • Remove the paper jam in the fusing unit. • Make sure that the paper path in the fusing unit is clear.
• Remedy:

• Code: 610
• Description: Mechanical counter error: K - - 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 • Defective BICU
• Remedy:

• Code: 620
• Description: Communication error between BICU and ADF A break occurred in the connection between the BICU and ADF
• Causes: • ADF disconnected • ADF defective • BICU harness connection loose, broken • BICU defective • External noise
• Remedy:

• Code: 621
• Description: Communication timeout between BICU and finisher A break (LOW) signal was received from the finisher.
• Causes: • Finisher serial cable connection loose, broken • BICU defective • Finisher main board defective • External noise
• Remedy: