Canon iR2020 Series Service Manual page 192

Chapter 8
The sub thermistor detected an abnormally high temperature (295 deg C) during temperature control.
E002-0000 LOW TEMPERATURE DETECTED DURING TEMPERATURE CONTROL
The main and sub thermistors detected an abnormally low temperature (140 deg C) during temperature control.
E003-0000 ABNORMALLY LOW TEMPERATURE (detected by main thermistor)
The temperature detected by the main thermistor does not reach the target temperature during initial rotation after it has reached the target temperature.
E003-0001 ABNORMALLY LOW TEMPERATURE (detected by sub thermistor)
The temperature detected by the sub thermistor does not reach the target temperature during initial rotation after it has reached the target temperature.
E007-0000 ABNORMALLY LOW TEMPERATURE (detected by sub thermistor)
A fixing film sensor failure has been detected.
E808-0000 DRIVE CIRCUIT FAILURE
A zero crossing signal cannot be detected.
A fixing drive motor failure has been detected.
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