Protective Functions; Detecting An Error Using The Thermistor; Detecting An Error Using The Thermal Switch; Errors - Canon iR6570 series Service Manual

9.4 Protective Functions

9.4.1 Detecting an Error Using the Thermistor

In the event of the following, the machine will set the DC power (+12 V) used to drive the AC relay (found on the fixing heater power supply PCB), thereby
stopping the AC power to the fixing heater.
- the main thermistor (TH1)/sub thermistor (TH2)/shutter thermistor (TH3) has detected overheating.
- the difference between readings of the main thermistor and the sub thermistor or between the main thermistor and the shutter thermistor has deviated from
a specific value.

9.4.2 Detecting an Error Using the Thermal Switch

In response to a deviation in temperature (200 +/-5 deg C), bimetal contact of the thermal switch (TP1; non-contact type) will open to cut the power supply
line (+12 VDC) used to drive the AC relay on the fixing heater power supply PCB, thereby stopping the AC power to the fixing heater.
Once open, the contact of the thermal switch will not reset itself even when the temperature drops to normal; be sure to replace the thermal switch after
removing the error.

9.4.3 Errors

ERROR CODE:
E000 (low temperature detection error)
0000Å@after power-on, the reading of the main thermistor is not 70 deg C or higher within 20 sec .
0010Å@the power has been turned off and then on without resetting the error in question.
E001 (abnormal rise in temperature)
0001Å@the main thermistor or the sub thermistor has been identified as being faulty, or an open circuit has been detected.
0002Å@the reading of the main thermistor or that of the sub thermistor is 230 deg C or higher for 2 sec.
0003Å@the reading is not 150 deg C or higher or 210 deg C or lower within 30 sec (at time of a remedial job).
0010Å@the power has been turned off and then on without resetting of the error in question.
E002 (faulty rise in temperature)
0000Å@the reading of the main thermistor is in excess of 70 deg C and, thereafter, it does not reach 150 deg C within 12 sec.
0001Å@the reading of the main thermistor is in excess of 100 deg C and, thereafter, it does not reach 150 deg C within 15 sec.
0010Å@the power has been turned off and then on without resetting of the error in question.
E003 (faulty rise in temperature)
0000Å@the reading of the main thermistor is in excess of 100 deg C and, thereafter, is lower than 70 deg C for 2 sec or more.
0010Å@the power has been turned off and then on without resetting of the error in question.
E004 (fixing heater power supply error (IH power supply))
0101Å@there is a mismatch between the input voltage and the IH power supply ID.
0102Å@the fault IH current is faulty (current leakage).
0103Å@the IH current is faulty (absence of current).
0104Å@there is overcurrent.
0105Å@the input voltage is too high.
0106Å@the IH input voltage is too low.
0201Å@when the power is turned on (or while the IH drive is suspended), the IH control mechanisms is not in an initial state.
0202Å@at time of IH start-up, the IH control enable flag is not set within 1 sec after the start flag has been set.
0203Å@when IH is stored, the IH control ongoing flag is not released within 1 sec.
0204Å@the 12-V power supply (IH relay) is identified as being OFF.
0205Å@at IH start-up, the PWM ON signal data has an error.
If E000 through E004 is indicated, the error code will not be reset even when you turn off the main power switch, requiring you to use service mode
(COPIER > FUNCTION > CLEAR > ERR).
Chapter 9
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0009-4540
0009-4626
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