Question about Emerson Computers & Internet
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Posted on Jan 02, 2017
SOURCE: UPS problem
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.
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Posted on Apr 16, 2008
there is a fuse behind the ups which can be removed by opening the socket replace it if faulty
and you can operate the ups
Posted on Nov 27, 2008
Does it trip immediately or after a time? If it's immediate then there's a dead short on the line (or possibly inside the UPS). If it takes time to trip then there's a slow build up of too much current use. This is usually caused by defective capacitors in a power supply.
Posted on Apr 06, 2009
This is normal in some lower end UPS's, the voltage can swing quite a bit, a drop of 40 seems like quite a bit but it's out of the question. It will also adapt to what is plugged in yes. Ultimately to test you would want to try it with something like an actual PC plugged in and make sure it stays running. I'd say otherwise it sounds normal to me.
Posted on Jul 10, 2009
SOURCE: bypass LED on the ups is on
This an excerpt from the UPS's manual:
The Bypass LED illuminates indicating that the UPS is in bypass mode. Utility power is sent directly to connected equipment during bypass mode operation. Bypass mode operation is the result of an internal UPS fault, an overload condition, or a user initiated command through an accessory. Battery operation is not available when the UPS is in bypass mode.
Posted on Jul 19, 2009
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