Zanussi ZWD14581W1 PCB replaced but still not quite there

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  • #96897
    Seret
    Participant

    Hi,
    I’ve just had the PCB die in my Zanussi ZWD14581W1 washer/dryer. It was definitely the PCB, there’s a burned out component on the old one I removed.
    I ordered the replacement PCB from Zanussi direct and have just fitted it. Happy days, the machine now powers up. However, when trying to start a wash cycle it just stops after a few seconds with the start button flashing.
    I’ve double-checked all the connections on the board and everything is plugged in properly. Does the PCB need any kind of config? I feel like I’m 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the way here and that I’m just missing something.

    #465270
    electrofix
    Moderator

    what part number did you fit ?
    and what is your full pnc number ?

    want to check you have correct part also is the start button flashing a sequence ?

    Dave

    #465271
    Seret
    Participant

    I fitted this part: https://shop.zanussi.co.uk/laundry/washing-machines/electronics/configured-electronic-ewm-2500/p/973914604322029
    To a ZWD14581W1 (914604322 02), this was the part the Zanussi site said was compatible.

    The start button isn’t flashing any code and there are no errors on the panel.

    #465272
    electrofix
    Moderator

    yes its the correct part but did you find out why the old one burnt out ?

    Dave

    #465273
    Seret
    Participant

    No, but this is the damage on the board if it helps:

    #465274
    electrofix
    Moderator

    trying to read nombers off blown chip

    what is the connector number in the fore ground

    Dave

    #465275
    Seret
    Participant

    That’s J1 on the left and J2 on the right. The chip that’s blown up is TYACS2

    The damage to the frame of the connector was me when I was dismantling it, they were on effing tight and since I was chucking the board I didn’t bother being too gentle with it. It’s possible I broke a connection in the plug while doing this perhaps, I may bell the wires out if I can find a circuit diagram.

    #465276
    electrofix
    Moderator

    does the door lock

    think that chip may feed it ?

    the key here is that chip but what worries me is there is a faulty component it feeds that could well blow your new board

    that chip is an electronic switch we need to find out what it feeds. if you know what connector it feeds out on i should be able to find out where it goes


    Dave

    #465277
    Seret
    Participant

    electrofix wrote:does the door lock

    Yup.

    See here for a short video of how it’s behaving: https://youtu.be/1XEqCbGJhVU

    Yes, I was worried that something had blown the chip on that board, but the new one is in there and there’s no smoke coming out of it yet…

    Assuming that the connectors adjacent to that chip are related to it, yes the wires do go down to the door interlock.

    Appreciate your help on this, btw!

    Edit:

    Just pulled the door lock out (it felt slightly warm tbh?) and the plug on it is showing some scorching. I thought I might have found a smoking gun, but the wires back to the board are still only showing 0.1 to 0.2 ohms and the door does lock.

    #465278
    electrofix
    Moderator

    long shot have you checked the motor?

    dave

    #465279
    Seret
    Participant

    electrofix wrote:long shot have you checked the motor?

    dave

    Getting about 23ohms through the motor and no short to earth.

    I have noticed something though: the Electrolux part number on the PCB Zanussi supplied isn’t an exact match for the one I removed:
    ​​​​​​
    Out
    In

    It’s physically the same and shows the same “boot ver” on the software side but could the different part number mean they’ve actually sold me one not programmed correctly for this machine? Their site assured me it was the right part…

    #465280
    electrofix
    Moderator

    check part number earlier and was correct programmed unit. assume you checked the part no on the box

    as for motor assume you checked

    Armature
    field coil
    Tachometer

    you need readings through all of them
    some field coils have 3 tappings

    Dave

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