No power on some outlets after blackout ?

[BillP]

Hello,

I'm writing this on my phone so I'll try to keep it straight to the point:

I have an APC Back-UPS ES 8 700 VA 230V CEE 7/7 (BE700G-GR). On the battery back-up outlets there's my PC and monitor. On the surge protection only outlets I have a lamp, router and an ONT.

Power went out earlier today while I wasn't using the computer, I figure the only thing that may require battery was the Monitor's stand-by led. Anyway, it lasted for about half an hour and since I didn't want to hear the beeping every 30 seconds or so I turned off the UPS from its on/off button after a while.

Now here's the thing: when power came back I turned on the unit, but for some reason the router and the lamp were not working (noticed since I expected the wi-fi to show up on my phone again). I'm not sure about the ONT as it's in a space below the desk, but I think it had some lights on so it must've had power.

I tried turning the UPS off and on again, still no power for the router or the lamp (definitely power for the ONT this time, light were on). Eventually I switched it off again, unplugged everything from the surge only outlets, then unplugged the whole unit from the wall socket, waited a few seconds then plugged them back in reverse order (UPS to main, rest to the UPS). Then I turned the unit on again and only this time everything started working properly.

Any idea why this happened ? I thought once power is back everything should work by default, as it was connected to mains.

Also, turned on the PC and ran HWiNFO just after and it showed the battery loading (up to 60 % at that time, cca. 20 minutes). When it's full it shows about 37 minutes of back-up time (I assume this is estimated for the load with the running PC and monitor). But then why would the battery go down to 60% after about 10 minutes of only a stand-by monitor led using it ?

Thanks in advance!

[BillP · Accepted solution]

Hi Andrei,

The Surge Only receptacles are fed directly from utility power and can not be interrupted by turning the unit On/Off. The only way these devices would no longer receive power is if the UPS was unplugged, you were suffering a complete blackout or if the Input Breaker on the UPS was tripped. This breaker is located next to the input power cord and would be noticeably tripped. I can't otherwise explain your symptoms.

As for the estimated run-time found in the PCPE software, the UPS is a "Stand-BY" design and therefore can not accurately gauge run-time until the unit has switched to battery. Once On-Battery and powering the load from the internal inverter, the unit can then determine the total run-time more accurately. 

Secret Squirrel

[win32dotex]

Same issue here, any solutions on this. Thank you.