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APC Smart-UPS 1000

Discussion in 'Electronic Repair' started by ian field, Apr 11, 2007.

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  1. ian field

    ian field Guest

    Someone donated this UPS and I was fully expecting the SLA batteries to be
    sulphated and scrap, but they were in fact reasonably charged and a session
    on the Optimate gave each battery the green light "good indicator".

    With the batteries fully charged and the mains connected the UPS remains
    dead as a dodo - no LEDs lit, nothing!

    A look on the website reveals that the unit can be shut down via software (I
    don't have the serial cable) but I would have expected at least 1 LED lit on
    the front panel, I've opened it up and confirmed both mains & battery
    voltage actually reach the PCB.

    Any suggestions?

  2. Dario

    Dario Guest

    Does it work on battery mode only, or completly dead?
  3. ian field

    ian field Guest

    AFAIK it can't be started unless mains was previously supplied and
    subsequently failed, if that is so then there is effectively no "battery
    only mode".

    As yet I've not put a load on it (I have to make up a O/P lead) as no LEDs
    on the front panel light, its supposed to do a self test when the "ON"
    button is held for a few seconds and its supposed to beep to indicate
    status, it doesn't do that either.
  4. UHF

    UHF Guest

    Hold the power button in for several seconds and see if it turns on in
    battery mode.

    Most likely it's just broken. I personally haven't heard of many
    people having good luck repairing APC's. There is no documentation
    available to troubleshoot them.
    NewsGuy.Com - $19.95 Unlimited Bandwidth
  5. ian field

    ian field Guest

    An instruction label on the case says hold the button for several seconds to
    activate self test - so obviously (and as I've already stated in an earlier
    post) I already tried that!

  6. The newer units will not function without a load. A 150 watt
    incandescent light bulb will do.

    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
  7. ian field

    ian field Guest

    When I looked on their website for the user manual the current offering of
    that unit has a choice of serial or USB, mine only has serial so I'm
    guessing it isn't all that new.

    Just in case I plugged a domestic fan in as a load, it didn't even twitch,
    the outputs are a row of flush IEC plugs - I thought it possible that these
    might have embedded switches to disable it if nothings plugged in, but this
    turned out not to be the case.

    There's no LEDs lit on the front panel, no feed through power, no bleeps and
    no sign of life from the inverter, although as I rested my hand on the
    chassis I'm sure I could feel it humming.
  8. Jeroni Paul

    Jeroni Paul Guest

    Are there any fuses on the board?
    Most UPS have a fuse for AC input, another for the output and another
    for battery, check all them.
    The battery one might look like the fuses found in cars. Otherwise you
    will have to troubleshoot and see where the current gets or doesn't
    get. Keep an eye that if the battery fuse is gone there might be
    something else wrong like shorted transistors, etc. I would try to
    supply with a 12V current limited source after replacing the fuse.
  9. ian field

    ian field Guest

    The battery fuse is an inline fuse between the 2 batteries (its a 24V
    inverter) this is visibly intact and I checked the 24V is getting to the
    transistors, the mains fuse is a button type circuit breaker and I checked
    240V is reaching the board, can't see any other fuses but it isn't easy to
    lift the board out because of the heavy cables to the heatsinks and a very
    fragile flexiprint to the front panel.
  10. Yuki

    Yuki Guest

    If it's one of the models with a rocker switch in the back then you can start it
    without mains supply holding the front on button while switching it on at the
  11. ian field

    ian field Guest

    No rocker switch.

  12. <,GWYA:en&q=APC+schematics&btnG=Search>

    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
  13. w9gb

    w9gb Guest

    I just fixed mine -- shipped from APC -- it had a constant alarm buzzer when
    plugged in and turned on.
    APC internet support -- could not help.

    The APC Smart-UPS 1000 uses a number of "QC" (Quick Connect) terminals.
    It is not uncommon for these to become loose during shipments or moves with
    this model.

    On my unit, found one of the transformer's secondary wires from transformer
    not fully seated on the PC board -- that was it -- working like a champ.

    When these APC units fail --- the top 3 reasons / problems:

    1. Bad lead-acid batteries
    2. Charger circuit bad (can not properly charge battery)
    3. Internet circuit (can not produce 120 VAC from good battery).

  14. ian field

    ian field Guest

    Thanks for the suggestions, the Optimate battery conditioner pronounced both
    batteries good - I'll check the other points.
  15. Jeroni Paul

    Jeroni Paul Guest

    It is likely many UPS have been dumped for just that.
    Inverter circuit?
  16. ian field

    ian field Guest

    This is the first UPS I've ever acquired that didn't have totally f****d
  17. Guest

    Sorry to be so late I just subscribed to the group. Did U get unit
    working, sounds to be dead power supply poss the switchmode. U could
    try heating it with a hairdryer to see if it starts when hot, don't
    cook it tho. Is poss the caps have dried out and won't allow it to
    start when cold, if it starts when hot caps will need replacing.
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