• Code: SC544-02
• Description: Fusing High Temperature Detection (hardware) (Non-Contact thermistor High Temperature Error) In the event of an error
• Causes: • Triac defective (short-circuit) • Engine controller defective • Heating central thermopile defective • Fusing control software: out of control
• Remedy: • Attach the new fusing unit, then run SP-5-810-002. • If the triac is defective, replace the AC power supply board. • If necessary, replace the BCU or the Fusing central NC sensor.

• Code: SC545-01
• Description: Fusing Central Heater Continuously Heat After waiting for full power for more than specified seconds continuously, not detected for specified seconds. • Definition of heater full power Continuously heating rate set point (maximum heating rate) • Measurement start point After reload (after heater extinguished, after rotation complete) below the standby temperature (target temperature), measurement starts after a heater heat-up request is issued. • Measurement stop condition Rotation started due to a print signal during measurement or other. • Maximum heat-up Duty (SP interlinked value) 0% is excluded.
• Causes: • Thermistor deformation/float • Heater disconnection • After excessive temperature rise prevention unit operates
• Remedy: • Replace the thermistor. • Replace the fusing lamp. • Replace the fusing unit.

• Code: SC545-05
• Description: Fusing Central Heater Continuously Heat (Low Voltage)
• Causes: Low Voltage
• Remedy:

• Code: SC547-01
• Description: Zero cross Error (relay-contact soldering) In the event of an error
• Causes: • Fusing relay defective (contact soldering) • Fusing relay drive circuit fault
• Remedy: • Turn the main power supply switch OFF/ON • If the fusing relay is damaged, replace the PSU. • Check the connection between PSU and control board, and replace harness and board if necessary.

• Code: SC547-02
• Description: Zero cross Error (relay contact fault) In the event of an error
• Causes: • Fusing relay damage (contact open) • Fusing relay drive circuit fault • PSU fuse (24VS) blowout
• Remedy: • Turn the main power supply switch OFF/ON. • If the fusing relay is damaged, replace the PSU. • Check the connection between PSU and control board, and replace harness and board if necessary. • If the PSU fuse (24VS) blows out, replace the fuse.

• Code: SC547-03
• Description: Zero cross Error (low-frequency error) In the event of an error
• Causes: Frequency instability of commercial power line
• Remedy: • Turn the main power supply switch OFF/ON. • Check the power source. • Check the connection between PSU and control board, and replace harness and board if necessary.

• Code: SC551-01
• Description: Fusing Edge Thermopile Disconnection When the fusing edge thermopile detects a predetermined temperature or less for specified seconds consecutively.
• Causes: • Thermopile disconnection • Connector disconnected
• Remedy: • Replace the thermopile. • Reset the connector. • Replace the connector. • Replace the fusing unit.

• Code: SC551-02
• Description: Edge NC Sensor Disconnection 3ED - 3FF (FB voltage: 3.243V-3.300V) is detected for specified seconds continuously (NC sensor center: detection & compensation NC sensor edge: detection & compensation). Detection period: 100 ms, detection frequency: 10 times or more.
• Causes: • NC sensor disconnection • Connector disconnected
• Remedy: • Replace the NC sensor. • Reset the connector. • Replace the connector. • Replace the fusing unit.