Troubleshooting UPS

Discussion in 'General Electronics Chat' started by guru200773, Apr 28, 2010.

  1. guru200773

    Thread Starter Member

    Apr 26, 2010
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    The UPS of my computer doesn't working properly i.e when ever the main supply is cut off or any fluctuation in the main supply a warning tone is alerting in my UPS but all of sudden my PC switches off ..... it has been working properlyf rom past two years.... but this last three days this problem start in it.... I think the backup battery might have loses its capacity... Pls suggest ur troubleshooting ideas for this problem

    thanking you
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Replace battery first and then try any thing else.
     
  3. retched

    AAC Fanatic!

    Dec 5, 2009
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    You can pull the battery and try to recharge it with another charger. If that works, it may be the UPS charging circuit.
    You may also be able to "bring back" the battery with a good charge.

    If you pull the wires off the battery, wait 15 min or so, then measure the battery voltage with a meter, if you have less than 13v or so, your battery may be bad.
     
  4. guru200773

    Thread Starter Member

    Apr 26, 2010
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    thank u friends i will try it :)
     
  5. guru200773

    Thread Starter Member

    Apr 26, 2010
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    hello friend i measured the voltage of battery when Mains supply is on, meter reads 13.40V. when i removed the terminals and measured the battery voltage it only measures 12.60V... And one more thing transformer is hot i don y..?:confused: ok shall i change the battery?
     
  6. guru200773

    Thread Starter Member

    Apr 26, 2010
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    Pls reply friends shall i change the battery
     
  7. retched

    AAC Fanatic!

    Dec 5, 2009
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    That is a good idea.

    How old is the original battery?
     
  8. guru200773

    Thread Starter Member

    Apr 26, 2010
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    It has been working properly for two years.. And transformer is getting too hot any problem in transformer or its a normal heat
     
  9. retched

    AAC Fanatic!

    Dec 5, 2009
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    How hot? Cook an egg hot, of uncomfortable to hold your finger on - hot?

    You may think of trying a desulphator. Sulphation can cause the problem you are having, especially with low charging currents.

    Give it a try. It may do the trick (takes a month or more) but hey, cheaper than a new battery and you dont have to throw it away.
     
  10. guru200773

    Thread Starter Member

    Apr 26, 2010
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    ya exactly i cannot hold the hand for more than 5 secs... What is desulphator?:confused: i am not aware of that:(
     
  11. retched

    AAC Fanatic!

    Dec 5, 2009
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    It sends pulses of energy into the battery that helps reverse the effects of aging (in batteries)
     
  12. guru200773

    Thread Starter Member

    Apr 26, 2010
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    oh.... thanks for ur info dude... but how the action takes place?
     
  13. retched

    AAC Fanatic!

    Dec 5, 2009
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    guru200773 likes this.
  14. guru200773

    Thread Starter Member

    Apr 26, 2010
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    ok dude thanks i will go through that article... dude one more help if u know about the UPS, UPS block dia, working of UPS and types just post the link because i learn about the UPS theoretically as well as practically...
     
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