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Schematic or service manual for SOLA 325 UPS

Discussion in 'Hobby Electronics' started by Sylvia Else, Apr 24, 2009.

  1. Sylvia Else

    Sylvia Else Guest

    My longserving SOLA 325 UPS suddenly quit yesterday. Other than a relay
    that switches when power is supplied, it appears completely dead.

    Anyone have a sevice manual, or schematic, for this model?

    Or ideas? Normally, my first thought would be that its PSU had failed,
    but it has batteries as backup!

    Thanks

    Sylvia.
     
  2. Sylvia Else

    Sylvia Else Guest

    Thanks, but that appears to be from the 305 model, which seems to be
    different.

    In the mean, time I've discovered that the reason it's completely dead
    even on battery is that the 40A fuse to the battery has blown.
    Disconnecting the large transformer and shorting out the fuse allows the
    display to light, go through its initialisation cycle, and then indicate
    a fault.

    The failure of the fuse wouldn't explain why the device won't run while
    on mains power, so the fuse is presumably a symptom of something else.

    Sylvia.
     
  3. Baron

    Baron Guest

    It could just be fatigue !
     
  4. Uh, sorry ... not close enough ?
    I strongly suggest that you replace the fuse, because the
    unknown fault might make things worse, and you may
    blow up the whole unit ( which could solve the problem )
    Sure it is. Sorry I didn't find the manual.

    What is the error/fault message on the display ?
     
  5. Sylvia Else

    Sylvia Else Guest

    Seems to be different, though it's useful in showing the likely general
    configuration.
    "UPS fault" indicated by a continuous beep from the unit.

    Given the number of transformer leads that I have unplugged, this is
    hardly surprising.

    Sylvia.
     
  6. Of course ... sounds a bit like Monty Python to me.
    Since you don't know the cause of the original failure,
    are you sure I won't happend again ?

    Did a short-circuit occur on the output(s) of this UPS ?
     
  7. Sylvia Else

    Sylvia Else Guest

    I've commented elsewhere in this thread that I've identified a couple of
    power switching FETs which are defective. One of them is shortcircuited,
    across all three terminals, which would certainly have blown the fuse.

    Of course, that just pushes the question down a level - am I sure that
    whatever blew the FETs won't happen again. And of course, the answer has
    to be no.

    These transistors only switch when the UPS is in backup mode. At other
    times, they're not switching, but their drains are connected to the
    secondary of a transformer that has mains applied to the primary. The
    failure could be attributed to a power spike, though I have to note that
    the UPS is plugged into a surge arrestor, and nothing else in the house
    seems to have suffered.
    No.
     
  8. Rich Grise

    Rich Grise Guest

    Have you asked SOLA?

    Good Luck!
    Rich
     
  9. Franc Zabkar

    Franc Zabkar Guest

    The OP could interrogate the UPS via its RS232 port using
    HyperTerminal:
    http://www.networkupstools.org/protocols/sola.html

    Unfortunately the status information probably won't tell her anything
    useful.

    BTW, I would suggest that sci.electronics.repair is probably a better
    newsgroup for this type of question than sci.electronics.design.

    - Franc Zabkar
     
  10. Sylvia Else

    Sylvia Else Guest

    I've asked the company that took them over. I don't hold out much hope
    though. They don't really have an interest in helping people repair old
    gear.

    Sylvia.
     
  11. solotech

    solotech Guest

    solotech had written this in response to
    http://www.electrondepot.com/australian/Schematic-or-service-manual-for-SOLA-325-UPS-6713-.htm
    :
    Try www.acdcmanuals.com.

    Cheers.

    -------------------------------------
    Sylvia Else wrote:
    -------------------------------------

    My longserving SOLA 325 UPS suddenly quit yesterday. Other than a relay
    that switches when power is supplied, it appears completely dead.

    Anyone have a sevice manual, or schematic, for this model?

    Or ideas? Normally, my first thought would be that its PSU had failed,
    but it has batteries as backup!

    Thanks

    Sylvia.

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