The sub thermistor 1 keeps detecting 50°C (122°F) or lower for a specified period during
STBY period.
◦
Abnormal low temperature 2
The sub thermistor 2 keeps detecting 80°C (176°F) or lower for a specified period during
INTR period or PRINT period.
The sub thermistor 2 keeps detecting 50°C (122°F) or lower for a specified period during
STBY period.
The sub thermistor 3 keeps detecting 80°C (176°F) or lower for a specified period during
INTR period or PRINT period.
The sub thermistor 3 keeps detecting 50°C (122°F) or lower for a specified period during
STBY period.
◦
Abnormal low temperature 3
The main thermistor keeps detecting 60°C (140°F) or lower for a specified period during
INTR period or PRINT period.
●
Abnormal temperature rise
Each thermistor does not detect a specified temperature within a specified period from when the
fuser heater is turned on.
●
Drive circuit failure
The current flowing through the fuser heater is out of specified power supply range. The current
flowing through the low-voltage power supply from the inlet is out of specified current range.
Fuser identification
Whenever the product is turned on or when the right door is closed, the DC controller detects whether
the fuser is present and whether the fuser is for a 110V model or a 220V model.
Fuser-life detection
The fuser is rated to print a certain number of pages. When a new fuser is installed, the DC controller
receives a signal and directs the formatter to set the fuser count to zero.
As pages are printed, the formatter increments the fuser count. When the page count reaches a
certain threshold, the formatter sends a message to the control panel to alert the customer to order a
replacement fuser.
When the maximum number of pages has printed, the formatter sends a message to the control
panel to prompt the customer to replace the fuser.
ENWW Engine-control system 25
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