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One day my SL Waber powerhouse 500 UPS stopped working

One day my SL Waber powerhouse 500 UPS stopped functioning as a power bar. In other words, when turned off the unit continued to supply power to whatever was connected to it. Any idea what is going on here?

Thanks

BB

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  • bb32yoho Aug 03, 2009

    Hi

    I use my SL Waber as a power bar for my computer and for my modem and router. When I am using my computer, I obviously have both my SL Waber and my computer turned on. If my wife wants to use the modem when I am not using my computer, she just turns on the Waber PH 500 to turn on the power to the modem. What she does when not using the modem is to simply turn off the power to the Waber PH 500 (which then turns off the power to the router and the modem). When I came home from a business trip I noticed that the modem was turned on. I had assumed that she had left the SL Waber PH 500 turned on. Upon inspection, it was clear that the SL Waber PH 500 was turned OFF, but the modem was receiving power through the SL Waber PH 500. This was and is perplexing: if the switch is turned off, how can power be getting through to things that are plugged into the SL Waber PH 500? I guess that the most obvious issue is that I could simply have a faulty switch.

    Hope this clarifies things.

    Thanks

    B

  • M_Butkus May 11, 2010

    How did you turn it off.. not by pulling the plug.

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Hi,

Based on your post/description, two (2) possibilities:
1. electronic fault - main power/AC mains sensor which could be really just a relay; or
2. corroded fuse terminals or fuse holder.

The first is a bit of a challenge since different brands/models have different sensing circuitry design. Some can be as earlier stated, a simple AC relay while others could be a TRIAC switch with a DIAC trigger. Still, some could be an elaborate AD converter and a myriad of logic circuitry. Often, a service manual or at least a schematic diagram would be needed, however these are not that readily available and most often the tech or DIYer must resort to winging it. This of course would require familiarity with electronic circuitry and components, use of a DVM and a soldering iron. Extreme caution must be exercised since even with 12VDC supply most of the electronics are at least at 60VAC+ level.

The 2nd possibility would be of course be the easiest to determine and repair. Replace/clean.

Should the downtime & repair cost makes the project no longer economically reasonable, perhaps your best bet would be to simply replace the UPS since their prices are relatively low.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Apr 16, 2008

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SOURCE: apc ups flashes red light to replace battery, but battery is new

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Did you ever get a resolution to this issue? I have the exact same problem. Someone advised that I should ensure that the Sleep mode is disabled through the config but that is already the case. Do you by any chance have the UPS in a non-air conditioned room where it might be getting too hot? Secondly, do you have both the battery leads connected to the battery pack or just one of the pairs is connected?

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