Damage Heater E1

  • Hello,
    I have successfully controlled a Berd-Air by E1 heater for month but I made a mistake in reconnecting after a modification. I have probably reversed the flyback diode.
    The sentence was immediate.
    When the pump started during the print, I got these messages followed by a shutdown of the printer:

    • M106 S0.1

    • list itemError: short-to-ground reported by driver(s) 0 1 2 3 4

    • list itemError: over temperature shutdown reported by driver(s) 0 1 2 3 4

    • list itemWarning: VIN under-voltage event (5.1V)

    I managed to restart the board and everything seems to work properly except E1 heater.
    It is continuously running from the start (E1 led is on).
    I connected a fan on the output and is always on with no pwm.
    I don't see visually damaged component on the board.

    Which component may be causing the problem?
    And if it's hard to replace, is there a way to disable this output?

  • Hello,
    Little UP, I was a little busy to follow this topic.
    Is there something that can be done ?

    I do not like the idea of having heater E2 running all the time, other than that everything seems to work well.

  • administrators

    @memeng sounds like the E1 FET has failed short. If you can work without it then the board should work fine with nothing plugged into the E1 header. Just check it does not get hot.

    Around the E1 FET which is marked TR8.

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