E544: Fusing overheat (back-up for E543)
- Definition - [A]
A fusing temperature of over 250 °C is detected 5 times by the main control
board (this takes 5 seconds)
- Possible Causes -
• AC drive board defective (check the triac)
• Fusing thermistor defective
• Main control board defective
E547: Continuous fusing lamp on condition
- Definition - [A]
The fusing lamp stays on at full power for 70.0 seconds while in the
stand-by condition after warm-up is completed.
- Possible Causes -
• Fusing thermistor defective
E548: Fusing ready temperature abnormal
- Definition - [A]
The fusing temperature goes 40 °C below or 40 °C over the stand-by
temperature after warm-up is completed.
- Possible Causes -
• Fusing thermistor connector not connected properly
E620: Communication error between main control board and ARDF
- Definition - [C]
The main CPU cannot start communication with the ARDF properly.
- Possible Causes -
• Poor connection between the main control board and ARDF
• Main control board defective
• DF main board defective
FSM 6-39 FT5535/4527/4522
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