Ricoh M016 Service Manual page 155

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
541
1. Check the harness connection of the thermistor.
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
SM
Service Call Conditions
6-5 M016/M017