Ricoh RN-MF2 Field Service Manual page 140

6. Troubleshooting
Fuser thermistor error
The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON.
• Disconnected or defective thermistor
• Disconnected or defective fusing lamp
1. Check the harness connection of the thermistor.
541
2. Replace the fusing unit.
• Execute "Engine Maintenance Menu" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to
• issue this SC code and cannot be operated.
Fuser reload error
This SC is issued if one of following conditions occurs:
The fusing temperature rises 8°C or less in 1.5 seconds; and this continues 5 times
consecutively.
-or-
The fusing temperature has not reached 45°C within 9 seconds (after the fusing lamp comes
ON while the machine is warming-up).
542
-or-
The fusing unit does not attain reload temperature within 35 s. (normal temperature) or 65 s
(lower temperature – the thermistor output is less than 18°C) after the fusing temperature
control starts.
• Defective or deformed thermistor
• Incorrect power supply input at the main power socket
1. Defective fusing lamp
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