Re: Dell 2700w j728n 3kVa UPS not starting
No, not yet. I did get my hands on a non-smart charger, but the batteries are dead. I am pretty sure new batteries will solve it, and I will buy new at some point and report back here.
Not sure when though, I don’t really need the UPS, it’s just a nice to have.
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Re: Dell 2700w j728n 3kVa UPS not starting
Good point. I'll see if I can get my hands on an old school used one for cheap (I'm in Norway, not Sweden btw. )
If I need to get a new one, do you know if this would do the trick? It's the only "old school" new charger I've found:
[url]https://www.biltema.no/bil---mc/bilbatterier/batteriladere/batterilader-612-v-758-a-2000030702[/url]Re: Dell 2700w j728n 3kVa UPS not st...weden btw. :))
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Re: Dell 2700w j728n 3kVa UPS not starting
Cruddy? Not sure what you are looking at, maybe the plastic on the connection has a bit of a tint? Anyhow they are more or less pristine. No bad connections there.
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Re: Dell 2700w j728n 3kVa UPS not starting
Thanks for the input.
@Per Hansson
I do have a smart [URL="https://www.biltema.no/en-no/car---mc/car-batteries/battery-chargers/battery-charger-12-v-8-a-2000040408"]12V 8A (The batteries are 12V 8.5 Ah) charger[/URL] that I tried on a couple of the batteries. That is throwing an F1 error message right after it tries to assess the battery.
F1 error could be: "Clamps are not secured", "Short circuited" or "reverse polarity". But none of those should be the issue....
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Re: Dell 2700w j728n 3kVa UPS not starting
I just checked, and all batteries are connected in series – totaling 8 x 12V = 96V. I attached a photo for reference.
Is there any other easyish way to test to see if it will turn on, without spending money on 8 batteries?...
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Re: Dell 2700w j728n 3kVa UPS not starting
And I'm back after two years. I finally had time to have quick look just to confirm that the batteries are all dead. And they are. Not surprising after two additional years just sitting there.
Anyhow, I just thought of something. Do you think it will be possible to hook the UPS up with just one battery for testing purposes?
That way I can get away with buying one battery, and if it works I can buy the rest.
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Re: Dell 2700w j728n 3kVa UPS not starting
I forgot to mention that I did try that – unplugged the battery connection and tried to power it on, but it did not work.
Will make a thread with more details as soon as I have the time.
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Re: Dell 2700w j728n 3kVa UPS not starting
Thanks for the fast reply!
Not sure if you want me to keep posting here, or make a new thread? This forum seems like a good place to get input on how to get this working?
(I just posted below, and I can edit/move it to a new thread if you would like that).
I can't find any reference regarding powering up without batteries, only that it's possible to power on with only batteries (see below).
This UPS worked fine the last time I powered it on (two-three years ago), and have...Last edited by nle; 08-25-2020, 07:42 AM.
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Re: Dell 2700w j728n 3kVa UPS not starting
Hi, bumping this.
Do you know if this model turns on without (or with faulty/discharged) batteries?
I have the Dell UPS 2700R that have been sitting for a couple of years. I only got 34,8V from the batteries (it's 8, so should be 96V), and it will not turn on at all.
So I'm contemplating buying new batteries, but I thought this model turned on regardless (as long as it has landline power), so I don't want to pay ~300USD for nothing. I'm hoping I'm wrong.
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