Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Notifications
Login / Register
Community
Community
Notifications
close
  • Forums
  • Knowledge Center
  • Events & Webinars
  • Ideas
  • Blogs
Help
Help
  • Explore Community
  • Get Started
  • Ask the Community
  • How-To & Best Practices
  • Contact Support
Login / Register
Sustainability
Sustainability

We Value Your Feedback!
Could you please spare a few minutes to share your thoughts on Cloud Connected vs On-Premise Services. Your feedback can help us shape the future of services.
Learn more about the survey or Click here to Launch the survey
Schneider Electric Services Innovation Team!

Back-UPS 850 start-up - intermittently fails with continuous whistling noise.

APC UPS Data Center & Enterprise Solutions Forum

Schneider, APC support forum to share knowledge about installation and configuration for Data Center and Business Power UPSs, Accessories, Software, Services.

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results forย 
Showย ย onlyย  | Search instead forย 
Did you mean:ย 
  • Home
  • Schneider Electric Community
  • APC UPS, Critical Power, Cooling and Racks
  • APC UPS Data Center & Enterprise Solutions Forum
  • Back-UPS 850 start-up - intermittently fails with continuous whistling noise.
Options
  • Subscribe to RSS Feed
  • Mark Topic as New
  • Mark Topic as Read
  • Float this Topic for Current User
  • Bookmark
  • Subscribe
  • Mute
  • Printer Friendly Page
Invite a Co-worker
Send a co-worker an invite to the portal.Just enter their email address and we'll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel
Invitation Sent
Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close
Top Experts
User Count
BillP
Administrator BillP Administrator
5060
voidstar_apc
Janeway voidstar_apc
196
Erasmus_apc
Sisko Erasmus_apc
112
Teken
Spock Teken
110
View All

Invite a Colleague

Found this content useful? Share it with a Colleague!

Invite a Colleague Invite
Back to APC UPS Data Center & Enterprise Solutions Forum
pete99
Crewman pete99
Crewman

Posted: โ€Ž2025-02-21 02:17 AM

0 Likes
6
460
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-21 02:17 AM

Back-UPS 850 start-up - intermittently fails with continuous whistling noise.

I have a APC Back-UPS 850 uninterruptible power supply. Sometimes when I switch it on it goes through the normal testing sequence but then all the leds go out and it makes a continuous whistling sound. If I switch it off and repeat, it normally starts up correctly.

 

PowerChute self-test passes.  The last battery replacement date, which must be when I bought the device, is September 2022.  The average load on the battery is consistently below 150 watts and the estimated battery time is over 20 minutes, which is pretty much what I remember it being when the device was new.

 

It's irritating but I can work round it.  Just wondering if there is an explanation or solution?

 

Thank you.

Reply

Link copied. Please paste this link to share this article on your social media post.

  • All forum topics
  • Previous Topic
  • Next Topic
Replies 6
Teken
Spock Teken
Spock

Posted: โ€Ž2025-02-21 07:40 AM

0 Likes
5
440
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-21 07:40 AM

Connect the unit to a computer running APC Power Chute Software. The system should indicate any active faults / error codes provide that information here for review.

 

You also have the ability to provide the data, event, ups logs. Upload them here for review so better insight can be given.

 

Questions Ask . . . ๐Ÿ‘

Reply

Link copied. Please paste this link to share this article on your social media post.

pete99
Crewman pete99
Crewman

Posted: โ€Ž2025-02-22 06:18 AM

In response to Teken
0 Likes
4
380
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-22 06:18 AM

Thanks for this.  I would say that my original post did say Iwas using APC Power Chute and that there is no indication anywhere of any failure.  The only "ups logs" I can find in the software are the PowerChute Technical Data, which I have attached and which reports "Result of last manual self-test: Passed".

 

To clarify my initial post, I press the power button on the UPS, it goes through the self test routine, then all the leds go out and it makes what I can best describe as a whistling sound from the internal speaker of the ups.

 

The only non-informational Windows Event Viewer events for APC Data Service or APC UPS Service are a couple of older "PowerChute not communicating with the battery backup." errors.

 

However, now I think about it, this is all irrelevant as the issue I'm reporting is when I'm pushing the power button of the UPS on in the first place - i.e. before the computer is booted.

Attachments
Reply

Link copied. Please paste this link to share this article on your social media post.

Teken
Spock Teken
Spock

Posted: โ€Ž2025-02-24 02:21 AM

In response to pete99
0 Likes
3
375
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-24 02:21 AM

You can install SPC PCSS software for better insight for event, data, ups logs. In the interim remove AC Mains and report back how long the system operates for on battery power.

 

Report back what the system indicates the battery voltage is prior and after the lights out test.

 

Once the UPS shuts down disconnect the battery and measure the voltage. Report back if it matches what Power Chute indicated.

 

Questions Ask . . . ๐Ÿ‘

Reply

Link copied. Please paste this link to share this article on your social media post.

pete99
Crewman pete99
Crewman

Posted: โ€Ž2025-02-27 06:32 AM

In response to Teken
0 Likes
2
344
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-27 06:32 AM

SPC PCSS software does not work for me.  The browser says the (self-signed) certificate is invalid.

Reply

Link copied. Please paste this link to share this article on your social media post.

Teken
Spock Teken
Spock

Posted: โ€Ž2025-02-27 08:27 AM

In response to pete99
0 Likes
1
343
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-27 08:27 AM

You just need to ignore the error message and say yes to proceed. 

Reply

Link copied. Please paste this link to share this article on your social media post.

pete99
Crewman pete99
Crewman

Posted: โ€Ž2025-02-28 01:57 AM

In response to Teken
0 Likes
0
316
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content

Link copied. Please paste this link to share this article on your social media post.

Posted: โ€Ž2025-02-28 01:57 AM

Thank you, but not in latest versions of Edge and Firefox on Windows 11.  Ridiculous that a piece of software would have this obvious gotcha.  (Possibly the issue with PCSS is due to time zones and the self-certification : I am in UK, it was morning and possibly it relies on US time zones?)

 

In any case, I posted the question thinking my issue would be something others had experienced and solved.  It seems that's not the case.  The issue only happens fairly occasionally so, rather than trying for a second time to get into PCSS and more determinedly work round the https issue (to collect data, not solve my issue), I think at this stage I'll just live with the issue.

 

Thanks to everyone for their responses.

Reply

Link copied. Please paste this link to share this article on your social media post.

Preview Exit Preview

never-displayed

You must be signed in to add attachments

never-displayed

ย 
To The Top!

Forums

  • APC UPS Data Center Backup Solutions
  • EcoStruxure IT
  • EcoStruxure Geo SCADA Expert
  • Metering & Power Quality
  • Schneider Electric Wiser

Knowledge Center

Events & webinars

Ideas

Blogs

Get Started

  • Ask the Community
  • Community Guidelines
  • Community User Guide
  • How-To & Best Practice
  • Experts Leaderboard
  • Contact Support
Brand-Logo
Subscribing is a smart move!
You can subscribe to this board after you log in or create your free account.
Forum-Icon

Create your free account or log in to subscribe to the board - and gain access to more than 10,000+ support articles along with insights from experts and peers.

Register today for FREE

Register Now

Already have an account? Login

Terms & Conditions Privacy Notice Change your Cookie Settings ยฉ 2025 Schneider Electric

This is a heading

With achievable small steps, users progress and continually feel satisfaction in task accomplishment.

Usetiful Onboarding Checklist remembers the progress of every user, allowing them to take bite-sized journeys and continue where they left.

of