Ricoh Bc-C1 Field Service Manual page 228

6. Troubleshooting
SC No.
553-00
SC No.
554-00
SC No.
557-00
226
Level Error Name/Error Condition/Major Cause/Solution
A Thermistor (edge) high temperature detection: Software
• Temperature above 230°C is detected for 1 second continuously.
• Detection with the thermistor (edge)
Detection time: 10 or more
Measurement interval: 0.1 sec
• Triac short-circuit
• MPU defective
• Replace the MPU.
• Clear this SC by executing SP5-810-001.
Level Error Name/Error Condition/Major Cause/Solution
A Thermistor (edge) high temperature detection: Hardware
Temperature of 250°C or higher is detected by the thermistor (edge).
• Triac short-circuit
• MPU defective
• Fusing control error
• Replace the MPU.
• Clear this SC by executing SP5-810-001.
Level Error Name/Error Condition/Major Cause/Solution
D Zero cross frequency exceeded
When low frequency is detected once, this SC is issued.
Power line noise
Turn the power off and on.