• Code: SC532-00
• Description: PSU Cooling fan error
• Causes: The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession. • Failed fan motor • Disconnected connector
• Remedy: • Replace the fan motor. • Check the connector. • Replace the harness. • Replace the IOB.

• Code: SC541-00
• Description: Broken fusing (Center) thermistor wire
• Causes: The condition whereby the temperature is -20 deg C or less for 5 seconds has been detected 10 times or more. • Broken thermistor wire • Bad connector contact
• Remedy: • Clear the SP: fusing SC. • Check the connector connection. • Replace the fusing (Center) thermistor.

• Code: SC542-01
• Description: Fusing lamp (Center) thermistor not reloaded 1
• Causes: The heater thermistor has increased by less than 2.0 degrees in 1.5 seconds 5 times in a row. • Deformed or floating thermistor • Input voltage out of range
• Remedy: • Clear the SP: fusing SC. • Replace the thermistor.

• Code: SC542-02
• Description: Fusing lamp (Center) thermistor not reloaded 2
• Causes: The heater (Center) thermistor does not reach the reload temperature 50 seconds after the start of motor rotation. • Fusing lamp disconnected • The overtemperature prevention mechanism started working
• Remedy: • Clear the SP: fusing SC. • Replace the thermistor.

• Code: SC543-00
• Description: Fusing (Center) thermopile high-temperature detected (software)
• Causes: The temperature is detected to stay at 245 deg C or higher for one second. • Shorted triac • Failed Engine Board
• Remedy: • Clear the SP: fusing SC. • Replace the PSU. • Replace the Engine Board.

• Code: SC544-00
• Description: Fusing (Center) thermopile high-temperature detected (hardware)
• Causes: The hardware high-temperature error sensor flag is detected. • Damaged triac (shorted) • Failed engine control board • Failed fusing thermopile • Failed fusing thermistor • Abnormal fusing control software behavior • The PWM signal is continuously supplied from the IH inverter (due to a software or temperature sensor error).
• Remedy: • Clear the SP: fusing SC. • Replace the PSU. • Replace the Engine Board. • Replace the fusing thermopile. • Replace the Fusing Unit.

• Code: SC545-00
• Description: Fusing (Center) lamp stays ON
• Causes: The thermistor (center) has not detected the target temperature, even after the fusing lamp stays ON for more than 30 seconds after reloading. • Deformed or floating thermistor • Broken fusing lamp wire • The overtemperature prevention mechanism started working
• Remedy: • Clear the SP: fusing SC. • Replace the fusing thermistor. • Replace the fusing (Center) lamp.

• Code: SC547-01
• Description: Zero-crossing error (adhered relay contact)
• Causes: When the fusing relay is in an OFF state, a "zero-crossing interrupt request" occurs in 50 ms. Damaged fusing relay (adhered contact)
• Remedy: • Turn the main power OFF and then ON. • Replace the harness. • Replace the PC board. • Replace the PSU.