Fuser failure detection
The DC controller determines a fuser unit failure, releases the relay to interrupt power supply to the
fuser heater, and notifies the formatter of a failure state when it encounters the following conditions:
●
Start up failure
◦
If the main thermistor does not detect a specified temperature during the start up process of
the heater in the wait period.
◦
If the main thermistor does not detect a specified temperature during the heater temperature
control in the initial rotation period.
●
Abnormal low temperature
◦
If the main thermistor detects an abnormal low temperature of the fuser unit during the printing
operation.
●
Abnormal high temperature
◦
If the main thermistor detects an abnormal high temperature of the fuser unit.
●
Frequency detection circuit failure
◦
If a specified frequency of the FREQUENCY signal is not detected within a specified period
after the product is turned on.
ENWW Engine-control system 13
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