How to repair UPS

On April 2, 2011 · 9 Comments · In Digital, Others, Photos

How to use your again ?


Never throw away your UPS first, maybe your UPS is not dead yet. You might repair it within a few minute.

Many computer shops will ask you to buy a new one UPS rather than change the battery, because they want to push their sales only. Don’t be fool by them, you can repair it, without throw away the old one, we need a green world isn’t it ?


The life time for the UPS normally in 1 or 2 years depends how much power failure during these period. Most of the time is battery failure, but not your UPS failure.

Unless your old UPS is burn out or some of the capacitor burn, if your fuse shorted, you just change the fuse.

Make sure your warranty is expired, if the UPS is still under warranty, you can claim and they will change free for you. APC have 2 years warranty, and other brand maybe have 1 year warranty only.

I found that APC is not using own brand battery too, so, don’t think that big company will give you good things inside. But they do provide better service than other.

Most UPS are using 12V 7Ah to battery, make sure the Ah is not over than that, if you put a , it won’t be worked.

You should open the UPS and check first which model of battery you should buy.

A new UPS could cost you 1,500 ( 50 USD ) Baht to 3,000 Baht ( 100 USD ), but the cost of a battery 12V 7Ah or 12V 7.2Ah is cost around 450 Baht ( 15 USD ) only. You could buy from most of the electronic shop. If you buy in computer shop, I think they will charge you more than that. If you send to repair, it will take you more time and more cost.

Here is the step to repair.

  1. Check that is Fuse broken or not. ( If broke, just take out and change it, normally is 5A 3A or something )
  2. Open the screw, from the back side and open the cover.
  3. Un-plug the red and black cable that attached to the battery.
  4. Take out the battery and take a photo ( with your phone ? ) or mark down the value ( because maybe you don’t understand what they wrote on the battery. )
  5. Bring your UPS battery photo or note to electric shop to buy one.
  6. Put the new battery to the same location in the UPS.
  7. Plug in the black and red cable to the battery.
  8. Close the cover
  9. Power on

Most of the case the UPS will work again. If it is no work anymore, then you can send your UPS to recycle. :)

If you just throw away or you just put them in the store room, you are making another piece of rubbish to this green world.

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9 Responses to How to repair UPS

  1. Reparing APC UPS « Justin.my says:
    November 4, 2011 at 3:41 pm

    [...] I’ve repaired the on last few months ago – Reparing Backup UPS – ES 500 [...]

  2. ARUN says:
    January 2, 2012 at 9:14 pm

    I HAVE UPS WHEN I REPLACED ITS BATTERY AND ON IT THAN ITS MOSFET BLAST AND ALSO OTHER CIRCUIT ARE BURN SO HOW TO I REPAIR IT?

  3. juzhax says:
    January 3, 2012 at 12:06 am

    change the Circuit. If smelly, buy a new one.

  4. hemant pal says:
    June 12, 2012 at 1:26 pm

    i have a ups of intex .
    it does not work in back-up mode please help me,
    i opened it but could not found any reasion

  5. juzhax says:
    June 12, 2012 at 2:00 pm

    send back to your local store for repair, do not open it, the warranty will be void

  6. khem says:
    August 3, 2012 at 6:01 pm

    i have a ups
    his buzzer sound is slow
    i check the output volt in multimeter he show 600v.

  7. madhukar says:
    August 9, 2012 at 11:04 am

    one day There is a out of range voltage. And at that time My UPS failed and some smell came from that. What happen to it and what to do now.

  8. datta mahajan says:
    August 31, 2012 at 12:25 am

    ups is not working,continue single beep.what can i do now.

  9. ram gopal says:
    September 4, 2012 at 1:11 pm

    sir mostly ups sound of gar, gad, ghhhh, what the reason of sound pls help me i have computer shop, so mostly i phase these problem, how i solve this, pls. convience me.

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