SC No. Level Error Name/Error Condition/Major Cause/Solution
SC554-00 A
Fusing (End) thermistor high-temperature detected (software)
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).
• Clear the SP: fusing SC.
• Replace the PSU.
• Replace the Engine Board.
• Replace the fusing thermopile.
• Replace the Fusing Unit.
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC557-00 C
Zero-crossing frequency exceeded
The number of zero-crossing interrupts exceeds a certain value in 500
ms.
The frequency of the commercial power supply line is unstable or noise
occurs.
None
SC No. Level Error Name/Error Condition/Major Cause/Solution
SC559-00 A
Fusing jam detected 3 times in succession
Fusing jam is detected three times in succession.
Paper is wrapped around the fusing roller.
Clear the SP: fusing SC.
6. Troubleshooting
132
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