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  1. #1
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    Default Ecogoo VFD Error Code

    One of my Ecogoo 240v single phase input to 380V 3phase output VFD's has tripped out with an OCH error code, the problem is that this particular code is not listed in the Instruction Manual. Has anyone experience this?

  2. #2
    BobL is offline Member: Blue and white apron brigade
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    What HP ratings are the VFD and motor?

    When does the error occur, on startup, unloaded motor, loaded motor???

    Sounds like it could be an Over Current error.

    My understanding is those VFDs don't allow the user to set a current limit but if it does, try reducing the max current.

  3. #3
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    Quote Originally Posted by Techo1 View Post
    One of my Ecogoo 240v single phase input to 380V 3phase output VFD's has tripped out with an OCH error code, the problem is that this particular code is not listed in the Instruction Manual. Has anyone experience this?
    Overcurrent. Same code mine threw when this happened (quote pinched from my Graziano thread.) And yes, annoying that the manual doesn't match up to it, but not unusual.

    Quote Originally Posted by Jekyll and Hyde View Post

    In the process of mounting the readout, I also discovered an unsung advantage to running a VFD. (The part was a spigot to put in the end of the tube for the brackets on the back out the readout to bolt to, once the radius was profiled I milled two flats in and cross drilled a hole. The radius allows clearance for the readout to tilt up and down a bit.)

    Attachment 391925

    Attachment 391924

    The advantage is that when you have a crash, the overcurrent protection trips very fast. Still not sure whether I failed to take the 0.5mm of backlash out of the cross slide on the last pass, whether I caught the corner of the tool at the OD, or whether the load of the 1/2" radius form tool at full engagement was just to much for the part in question (a piece of scrap which had a random hole drilled up the guts from some past endeavour). Either way, I heard the crunch of the part climbing up onto the tool, and the motor was already off before I'd even had time to react. It did maybe half a revolution total with the tool dug in there, no noticeable damage to anything other than the part (even the HSS tool was fine). I think had it been running straight off 3 phase like normal, this would have been a much more exciting crash by the time either I'd reacted, or the fuses had blown. Not exactly going to rely on it to save my ass, but it is nice to know if you have a serious oops that the VFD will likely shut it down fast enough to keep the damage to a minimum.
    In this case the cause was pretty clear, but I think it's worth commenting that the HuanYang on the mill for some weird reason trips out with some sort of error if I crank the varispeed handle too fast when slowing it down. Doesn't do it under any sort of cutting load, just if you spin the speed changer down too fast, and has done it for years.

    So the cause may or may not be something sinister, depending on the circumstances... Potentially trying to brake the spindle/motor too fast could do it (short decel time), I always just set mine to 'coast'...

    Quote Originally Posted by BobL View Post
    My understanding is those VFDs don't allow the user to set a current limit but if it does, try reducing the max current.
    I assume with this you're referring to a current limit which keeps the motor running, whilst not allowing it to draw over X amount of current?

    The EcoGoo has a section for motor parameters including current, but as far as I can tell exceeding that just trips a fault, so reducing the current would make things worse if there was a persistent problem...

  4. #4
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    Quote Originally Posted by BobL View Post
    What HP ratings are the VFD and motor?

    When does the error occur, on startup, unloaded motor, loaded motor???

    Sounds like it could be an Over Current error.

    My understanding is those VFDs don't allow the user to set a current limit but if it does, try reducing the max current.

    The motor is 2 speed, 1.2kw on high speed. The VFD is 2.2kw (see photo of motor data plate). I think this error is fatal as I cannot get rid of it.

    Attachment 392156

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    BobL is offline Member: Blue and white apron brigade
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    Did you leave the 2 speed switch in place and did you try switching speeds with the motor running

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    Quote Originally Posted by BobL View Post
    Did you leave the 2 speed switch in place and did you try switching speeds with the motor running
    I select the speed before switching the motor on. I may try to get the unit replaced under warranty but I don't really like my chances.

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    Just a follow up on this thread for anyone with this same problem: after replacing one of the six IGBT's with a new item from Aliexpress the drive is now running like new.

    Ecogoo vfd.jpg

    IGBT.jpg

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    How did you determine which IGBT was the problem child? Good fault finding.

    Steve

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    Quote Originally Posted by Reidy41 View Post
    How did you determine which IGBT was the problem child? Good fault finding.

    Steve

    Just by comparing readings between them with a DMM and finding one that was completely different to all the others. After removing it a final test with a component tester confirmed that it was faulty.

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