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ES350 does not switch back to ac power after shutting down/hibernating pc

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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dorkultra_apc
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167

ES350 does not switch back to ac power after shutting down/hibernating pc

This was originally posted on APC forums on 7/10/2008


I purchased an es 350 recently. I have it hooked up to a single computer, netgear router, and
the computer is an amd athlon 64 3000+, it has no monitor because it acts as a small server

powerchute indicates that i should get about 4 minutes of battery time, in all actuality, i achieve maybe 1 minute even at 100%.
i tested it by pulling the plug from the wall and the following happened:
the 4x beeping starts to indicate that it has no ac power, after the minute passes, the powerchute initiates a hibernation, during that time the beeping becomes rapid and the green light goes on and off about 2x per second (this is because the battery is getting low, i would imagine)
once the server goes into hibernation and shuts off completely, the rapid beeping stops and the normal beeping (4x to indicate battery power) resumes.
at this point i plug in the main power to the ups and the beeping stops.
when the server is powered on, after about 10 seconds the rapid beeping starts and will not stop whether have the ac to the ups plugged in or not
then the entire ups shuts off and powers back on a second later

i will have to try it out again tomorrow, but this is what i recall happened when i tested it a couple of times today.
i don't get it, the paper that came with my ups said that everything passed, the ups is about 2 weeks old. i know i am overpowering it, but it seems like it is malfunctioning if it rapidly beeps after a hiberation. it seems like it doesn't realize that it has ac power available after it hibernates my server


Accepted Solutions
EZ_Button_apc
Commander
Commander
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166

Re: ES350 does not switch back to ac power after shutting down/hibernating pc

This was originally posted on APC forums on 7/10/2008


Well there's a few advantages to the shutdown.

1) It extends the battery since it does go to a full exhaustion state.
2) If the computer bios is set to "reboot upon power" the cycle will actually reboot the computer back it's normal state. You won't even know the power outage happened unless you were there.

See Answer In Context

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dorkultra_apc
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166

Re: ES350 does not switch back to ac power after shutting down/hibernating pc

This was originally posted on APC forums on 7/10/2008


thanks for the reply, that makes a lot of sense

i guess i'm just used to my cyberpower ups. after it shuts down the computer, it just sits there and continues to supply power from the battery until it runs out. the ups itself does not do a shutdown sequence. if ac power is restored at any time, it will switch back to ac and start to recharge the battery
in my opinion i like the cyberpower better, it just makes more sense because it attempts to keep devices powered for as long as possible

EZ_Button_apc
Commander
Commander
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166

Re: ES350 does not switch back to ac power after shutting down/hibernating pc

This was originally posted on APC forums on 7/10/2008


This is normal operation of the UPS. When you pull the plug the unit very quickly hits low battery. This starts the shutdown sequence. You computer will shut down, but the UPS is still in it's shutdown process. At this point, you're manually turning your system back on while the UPS is still shutting down. A few seconds later, the UPS shuts off and turns back on immediately since it's now plugged in and senses good input power.

During a normal power outage situation, no one would be there to manually turn the computer back on. In that case, the UPS would go to battery -> starts shutdown sequence -> computer turns off -> (say AC power returns now) -> UPS is still shutting down and computer is still off -> UPS shutdown process completes -> UPS turns off -> senses good power from the wall -> UPS turns back on -> the cycle in power will then power your computer back on granted it's bios is set properly to turn on when power is present.

Once the UPS hits low battery, it takes about 180 seconds for the UPS to turn off and complete the shutdown process.

For your test to work properly. You would just have to wait a few more minutes before turning the computer back on. You'll see the UPS turn off and back on and likely hear a click around the time you know it's safe.

EZ_Button_apc
Commander
Commander
0 Likes
0
167

Re: ES350 does not switch back to ac power after shutting down/hibernating pc

This was originally posted on APC forums on 7/10/2008


Well there's a few advantages to the shutdown.

1) It extends the battery since it does go to a full exhaustion state.
2) If the computer bios is set to "reboot upon power" the cycle will actually reboot the computer back it's normal state. You won't even know the power outage happened unless you were there.