Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Unfortunately for me, the noise remains even after trying with new batteries.
I went to Walmart and got 4x12V car batteries. I don't know their AH rating, but it was just meant to check if new batteries yield same noise in the UPS.
I am not sure if the impedance of the batteries could be a problem, but I don't want to risk buying "APC compatible RBC7/RBC11" batteries to verify that and end up with the noise not going away even after getting such batteries.
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vsmGuy
Member
Last Activity: 09-23-2012, 03:07 PM
Joined: 07-09-2006
Location: southern california
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
When you mentioned "2/5 of nominal capacity, but working normally" did you mean "2/5 of AH rating" but correct voltage?...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Don't get me started with the BackUPS - for some reason these seem to be the only kind APC now sells to consumer retail
Anyways, if the batteries are the problem, could you recommend something I can buy, from say Walmart or Home Depot etc just to check if a new battery makes the noise go away?
I wish you were in SoCal so I could loan a set from you to put into my UPS to check
BTW - If these batteries are the problem, how do they manage to still give me ~2hours...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
Attached is a clip of the sound that comes from the 22uF, 150V bipolar yellow capacitor when charging the batteries/online.
At 45s into the recording, I turn off the line power - notice how the noise goes away completely when it's running off batteries in the 1000VA (the one which was running when I recorded the noise). It returns/increases when I connect a heavy load to the UPS output.
I am sure you will agree this is very different from the gentle hum of a transformer?
If this...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Oh - got the polarities reversed. Thank you for this detail.
Awkward enough: I looked around a few hardware stores and no one seemed to have a screw on type standard AC male type plug - all were molded (I wanted to replace the L5-30 with standard AC male type plug)....Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Attached is a clip of the sound that comes from the 22uF, 150V bipolar yellow capacitor(s) in both the models when charging the batteries.
At 45s into the recording, I turn off the line power - notice how the noise goes away completely when it's running off batteries in the 1000VA (the one which was running when I recorded the noise)
I am sure you will agree this is very different from the gentle hum of a transformer?
If this is a characteristic sound of APC...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Exactly - hence my concerns in [URL="https://www.badcaps.net/forum/showpost.php?p=267811&postcount=13"]#13[/URL]
Anyways, as the UPS does not charge each battery individually I could perhaps buy those deep cycle RV batteries instead?
Any good models in mind that I could buy from a B&M store?
Possibly - I wired the input myself as it came with NEMA L5-30P.
What else could be the reason (I saw a 1500VA unit from...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
I got a closer look at it this morning on the way to work:
1. The batteries are hardwired in series by a thick yellow wire. The individual batteries measure 26.3V each off load.
2. site wiring fault led is on (hmm, now why would that happen besides the obvious?)
3. And guess what - this too has that high pitched buzzing noise that my APC 1000VA has! Now unless this is surely an issue with the batteries being old, I now have sunk in way too much money in products that simply...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Oh yes - the +BATT goes through the fuse to become +BATTF and then it goes to the transformer which has 24V and 12 taps.
Hmm, but could you answer the above question I had:
does it mean that the UPS sees the internal RBC11 as a single battery as well?
This would mean that it does not charge each battery individually and then I will have to be very careful with the new batteries I buy (one bad battery can affect all of them since they are in series)
...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Thank you Behemot: does it mean that the UPS sees the internal RBC11 as a single battery as well?
This would mean that it does not charge each battery individually and [B]then I will have to be very careful[/B] with the new batteries I buy (one bad battery can affect all of them since they are in series)
This would perhaps ALSO mean I can buy those deep cycle RV batteries?Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
Thank you...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
I got to have a quick look at the unit on way to work, will look into it in details over the weekend.
Model number: [URL="http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SU2200XLNET&CFID=56116157&CFTOKEN=15391435"]SU2200XLNET[/URL]
It has an external blue connector that says 48VDC but the schematic I linked has no 48VDC Input - the highest it goes is 24VDC
If the batteries are dead, a 48VDC system would...Leave a comment:
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Re: Can I test or operate APC Smart UPS 2200 off a single RBC7
I posted the schematic to the model: would you be able to show me where the two batteries are being added together to get 48V (because each individual battery is 24V) - I am interested.
The UPS that buzzes is the 1000VA one i have - sounds exactly like a camera flash charging up - but continuously. The thread where I reported this last month is active again if you want to check it out.....Leave a comment:
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Can I test or operate APC Smart UPS 2200 off a single RBC7
I have a noisy APC Smart UPS 1000 that has a single RBC7.
I have someone interested in selling me a APC Smart UPS 2200XL.
The 2200XL unit does not turn on, so it might be that the batteries require replacement or that the unit itself is dead.
1. Would I be able to plug the RBC7 that I have into one of the connectors of the APC Smart UPS 2200XL and have it come up (hence telling me the unit itself is good and the batteries require replacement)?
The APC Smart UPS 2200XL requires two batteries - APC calls the pair RBC11.
Here... -
Do APC UPS emit buzzing noise when their batteries are dying
Thanks Toasty for the reply.
I replaced both the caps around the area and the noise remains.
Since the noise comes when the batteries are charging or when I make them discharge - could it be something because of the batteries themselves?
I saw these posts on the internet that suggest that could be a possibility:
[URL="http://www.fixya.com/support/t13682261-continous_whine_sound_apc_surge"]The whine is usually caused by the charge circuit...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
Toasty, I had hoped you were wrong and sunk ~$30 in parts to replace the caps (new, exact to original specs).
Noise remains - perhaps a bit louder than before
The noise is very well from the 20uF cap we were discussing about - I can feel it vibrate when I touch it with a wooden stick.
Replacing the 20uF cap did not help - the noise remains, as I noted above.
I really like this unit and would hate to trash it, if it has become...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
Thank you Toasty for the advice -
The original cap that is making the noise (and the one I intend to replace) is SIEMENS EPCOS 20uF 150V Capacitor.
Given that, these seem to fit the bill just fine: [url]http://www.bgmicro.com/24uf220vac.aspx[/url]
It's the age that worries me.
I can do that - the lamp acts as a current limiter (in case the cap is shorted)? Would a regular 40W incandescent work for this?Re: Need tips in fixing APC 1500VA...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
I found caps of similar rating (20uF 250V) that are $3 each: [url]http://www.bgmicro.com/24uf220vac.aspx[/url]
1. However, these are 12 years old (made in October 1998) - should it be good to go or it's too old to be of use?
2. I am assuming Metallized Polyester Film, specified Metallized Mylar should be better quality being a brand name and not a generic Polyester cap, or is Mylar and Polyester used pretty much interchangeablyRe: Need tips in fixing APC 1500VA...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
Things like this make me say "ignorance is a bliss". All the while I had been buying surge protectors and I have only one power tap I got at Walmart. Now I either need to remove the protection PCBs from the strips I have or buy new taps
I was afraid something like this might be up, but read on (I don't want to put in $50 in parts + a weekend of my time behind a lost cause)
I gave it a closer look today - the EPCOS is...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
Toasty, quite an insightful post
Yes, I posted the source link to this here: [url]https://www.badcaps.net/forum/showpost.php?p=254875&postcount=5[/url]
The caps are light brown, and hence, a shade darker than orange, but perhaps they were that color to begin with?
Correct, and I posted closeup shots here: [url]http://electronics.stackexchange.com/questions/36314/fixing-apc-ups-buzzing-noise[/url]
Also, a user on this...Leave a comment:
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Re: Need tips in fixing APC 1500VA UPS having buzzing noise
I know - that's because EPCOS makes them no more. See the model number on the picture I attached. Even if they did, their MOQ is 4k pieces.
In all probability, the capacitors I am going to buy are going to be generic ones with no data sheet. That's why I asked the questions in my first post to begin with and would very much like your feedback on them....Leave a comment:
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