Detecting An Error - Canon iR4570 Series Service Manual

Chapter 9

9.4.2 Detecting an Error

iR2270 / iR2870 / iR3570 / iR4570 / iR3530
As part of its protective mechanism, the machine checks for the following error conditions:
Error
code
E000
E001
E002
E003
9-10
Detail Symptom
code
0000 The fixing
temperature fails to
increase.
0000 The thermistor
detects
overheating.
0001 A hardware circuit
detects
overheating.
0002 The sub thermistor
detects
overheating.
0000 The fixing
temperature fails to
reach a specific
level.
0000 The fixing
temperature has
dropped to an
abnormally low
level.
T-9-3
Description
In the course of start-up control, the
thermistor reading is less than 30 deg C 1
sec after the start of power supply or is
less than 70 deg C 2 sec after the start of
power supply; the machine will identify
an error condition if any of the foregoing
continues for 200 msec or more.
The thermistor detects 235 deg C for 200
msec or more continuously.
A hardware circuit detects overheating in
relation to the thermistor (main or sub).
The thermistor detects 295 deg C or more
for 200 msec or more continuously.
In the course of start-up control, the
thermistor detects a temperature lower
then 115 deg C for 200 msec continuously
after it has detected 100 deg C; the
thermistor detects a temperature less than
150 deg C for 200 msec or more
continuously after it has detected 140 deg
C; or, the thermistor detects a temperature
lower than 165 deg C for 20 msec or more
continuously 1 sec after it has detected
160 deg C.
In the course of normal temperature
control, the thermistor detects a
temperature lower than 140 deg C for 20
msec or more continuously.
0006-6013