ES 750 Battery Status Question

[Anonymous user]

Hi,
I have a Back-UPS ES750 that is about 5 years old. I have my PC (300W supply), monitor, router, and modem plugged in. Lately, the PC has been shutting off at random times. So I started checking the UPS since everything on the PC seemed okay. The status page says I have 59 minutes of run time and the green light is lit on the UPS itself. However, when I unplug power, everything shuts off and the UPS starts to beep.
I know the unit is supposed to run a self test, but is there anyway to initiate it manually? I do not see it in the software ( using newest version 3.0)
I'm okay with replacing the battery if that's the issue, I just want to understand why the self test is not picking this up and why the status still shows healthy.

Thanks for your time!

[BillP]

Hi Greg,

It seems to me that the ES 750 that you have there doesn't support self-test through the software. You can manually initiate this by pressing and holding the power button until you see the Green LED flashing. Once you see the LED flashing, release the button. The UPS also performs self-test every time you turn the unit off and on or every 2 weeks from the last self-test that occurred.

You have mentioned that your UPS beeped, can you recall how many beeps was it? Also, just wanted to check if all of the load on the battery side turned off during that time. Do you also have a UPS that might be using the same battery as your 750VA unit? It is worth to try swapping the batteries.

[Anonymous user]

Hi Jon,
I tried running the self test by holding the power button (the UPS was already on). I held it for about 15 seconds and nothing happened, so I let it turn off. Then I turned it back on then held the button again. This time, the light started flashing RED/GREEN and there was a continuous beep. All items connected to the UPS turned off.

So I assume the battery is bad, but why is the light still green on the UPS? Also, where can I find the log file of the self tests results?
Unfortunately, I don't have another UPS to swap batteries with.
Thanks for the reply!

[BillP]

When you turned the UPS on, did you saw the LED flashing Green just before pressing the On button? Unfortunately your UPS doesn't log the self-test results. It would help as well if you could provide the exact model of your UPS so that we would know what indicators to expect if there is a bad battery or a disconnected battery problem.

Considering the age of your UPS, in the event that there is something wrong with the battery it would be best if you'll have the entire UPS replaced.

[Anonymous user]

Hi Jon
The model number is a BE750BB.
I tried running the test you asked. When I turn the UPS on, there is no flashing, the light just comes on green, and after a few seconds I can hear a click.

I also tried running a reduced load test by just having the monitor, modem, and router on (PC off) and unplugging from the wall.
Here is how it went..

Unplugged UPS
4 beeps from the UPS then transitioned to beep about every second with a green flashing light. Everything stayed on.
I then tried to turn on the PC while this was going on (according to my status, I should have had a good full charge..)
When I hit the PC power button, the UPS beep twice and everything shut off.
Green light was also off.
Then the UPS did a single beep about every three seconds (no lights) for about a minute then went quiet.

[BillP]

Correct me if I am wrong, the way you tested it is you've let the UPS ran on battery and then turned the PC on and it went off? If this is the case, it looks like the battery is not holding enough charge as before causing the battery to discharge faster.

[Anonymous user · Accepted solution]

Yes, I had only the monitor, modem, and router turned on. I then unplugged the UPS from the wall. Everything stayed on. When I attempted to turn on the PC, thats when it died.

You are probably correct that it just needs a battery. I guess I'm just confused as to why the UPS still shows a green light (not red indicating replace), or why the status in the PowerChute software indicates a full charge with approx 30 minutes of time available. Any ideas?

Message was edited by: craig72