• Code: SC551-02
• Description: Edge NC Sensor Disconnection 3ED - 3FF (FB voltage: 3.243V-3.300V) is detected for (t13) 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

• Code: SC551-03
• Description: Edge NC Sensor Short-circuit AD value: 0-13 (FB voltage: 0.000V-0.041V) (*3) is detected for (t14) seconds continuously. Detection period: 100 ms, detection frequency: 10 times or more.
• Causes: • NC sensor short-circuit • Connector disconnected
• Remedy: • Replace the NC sensor • Reset the connector • Replace the connector • Replace the fusing unit

• Code: SC552-02
• Description: Fusing Central Thermopile Does Not Reload (T21) degrees C not reached after heater 1 ON for (t3) seconds.
• Causes: • Thermopile lens dirt • Thermopile modification, float • Outside input voltage guarantee • After excessive temperature rise prevention unit operation
• Remedy: • Replace the thermopile • Make sure that the input voltage is within acceptable limits • Replace the fusing unit

• Code: SC552-03
• Description: Fusing Central Thermopile Does Not Reload Heating edge reload permission temperature not reached after heater 1 ON for (t312) seconds.
• Causes: • Thermopile lens dirt • Thermopile modification, float • Outside input voltage guarantee • After excessive temperature rise prevention unit operation
• Remedy: • Replace the thermopile • Make sure that the input voltage is within acceptable limits • Replace the fusing unit

• Code: SC553-00
• Description: Fusing End Thermopile High Temperature Detection (software) Above (T3) degrees C detected for (t4) seconds continuously. Detection period: 100ms, detection count: 10 times or more.
• Causes: • Triac short-circuit • IOB defective • BCU defective
• Remedy: • Replace the IOB • Replace the BCU • Replace the fusing unit

• Code: SC554-01
• Description: Fusing end thermopile high temperature detection (hardware) In the event of an error
• Causes: • Triac defective (short-circuit) • Engine controller defective • Heating edge thermopile defective • Fusing control software: out of control
• Remedy: • If the triac is defective, replace the AC power supply board • If necessary, replace the BCU or heating edge thermopile

• Code: SC554-02
• Description: Fusing end NC sensor high temperature detection (hardware) In the event of an error
• Causes: • Triac defective (short-circuit) • Engine controller defective • Heating edge thermopile defective • Fusing control software: out of control
• Remedy: • Attach the new fusing unit, then run SP-5-810-002 • If necessary, replace the BCU or Fusing edge NC sensor

• Code: SC555-00
• Description: Fusing Edge Heater Continuously Heat After waiting for full power for more than (t6) seconds continuously, not detected for (t8) 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 excess temperature rise prevention unit operation
• Remedy: • Replace the thermistor • Replace the fusing lamp • Replace the fusing unit