Back-Ups RS 1100 shuts off when line voltage becomes low. Why?

[Anonymous user]

I have an APC Back-Ups RS 1100 for the past 2 years and it started to show a weird problem from the past week. The UPS is working perfectly fine with good backup time, no battery warnings etc. But the UPS just shuts  itself off when the line voltage drops below 180v and emits a constant beep until I turn it off. I have tried all sensitivity modes but of no use. The UPS is supposed to go on battery when the line voltage drops but here it just turns off with a constant beep. But when there is a complete power outage the UPS works fine, transfers to battery and gives good backup time and returns to line when the power is restored. But if the power is restored by anything less than 180 volts, then it shuts off and starts to beep continuously until I turn it off. Backup is fine and it is handling the load well. And this model don't have any software support and I can't doubt the batteries since they are just 2 years old. What could be the problem here?

[BillP]

Can you provide the part# of your BackUPS?

[Anonymous user]

MODEL NO: BR1100CI-IN

Serial No: EB1037001480

[BillP]

Your UPS may already have an internal fault. Can you try to brain dead or de-energize the UPS?

To brain dead a Back-ups is to purge the charge in the brain of the UPS. To do this, follow the below procedure:

1: Disconnect any attached load.

2: Unplug the UPS from the wall socket.

3: Disconnect the UPS' internal battery.

4: Push and hold the ""On"" button on the UPS for 5 seconds

5: Reconnect internal battery.

6: Plug UPS in to known good power source.

7: Turn UPS on.

If doing the above steps do not resolve the issue, I suggest that you get in touch with your local technical support to verify the warranty and have the unit replaced if necessary. Hit the link then choose the India from the country selection drop down. I hope this helps

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[Anonymous user · Accepted solution]

I too have a realistic issue at hand:

The APC Back-UPS RS 1100 is supposed to protect computers, monitors and other equipment, as it also includes a surge protector. But one place where it fails is, if it switches back from an incoming Inverter supply to the Normal Power supply. The UPS totally trips and the Computer restarts. Somehow the Computer has been able to withstand so many re-starts, but some data loss has occurred on the Computer. Having used other UPSes before like Microtek, CompactUPS and a few others that never Trip totally when switching back from an Inverter power supply to the Normal Power supply, I am shocked and dismayed at such occurrence on a UPS being offered by such an advanced company that specializes in UPSes. It seems that a company of the size and know how as the American Power Conversion has not been able to customize their UPS's to the Indian environment, where most of the homes are equipped with an inverter because of the unsure power supply in most of the parts of the country. An inverter would be connected to the whole supply to the home. In view of this, making sure that the UPS does not get the Inverter power input is pretty difficult to setup. After going through the Manual, where a change is recommended in the sensitivity of the UPS and making the change, it did not improve the fact that the UPS trips totally when switching from an Inverter supply to the Normal Power supply. Sometimes, it makes one wish not to go for costly known products that do not perform, and rather stick to local/unknown brands that are more reliable.

[BillP]

Hi ruva,

The issue you have described is what is typically observed from a groundloop existing in your system. I would suggest disconnecting all datalines, which may be connected to any device receiving power from the BR1100CI and attempt a pull plug test to help confirm this. Groundloops often exist over Datalines connected between two devices which are receiving power from two separate electrical sources, that do not share a ground reference.

[BillP]

I have a little bit different types problem ,charging voltage is not proper,its showing 24.57

What's matter

[wstar123]

Can you please continue this discussion in my thread here because I am experiencing a similar issue:

https://community.se.com/t5/APC-UPS-for-Home-and-Office-Forum/UPS-seemingly-turn-off-during-square-w...