RS-900 No Power

[Anonymous user]

Hello All,

I have about 20 RS-900's that I have had in storage for well over a year. I recycle electronics and these units were given to me in an unknown condition. I am unable to get any activity on the units. I dont hear any noise, see any lights, or get any power from battery backup side of outlets. The surge only outlets provide ample power. I have plugged each one of these in following cold start protocol, and after reviewing the manual and reading many other forum posts I am at a loss. I have read that if the batteries are completely drained you wont get any power but thats hard to believe. I would like to resurrect these if possible rather than scrap them. Any ideas? First few of serials 5B0741U.

Thanks~!

[BillP]

To start with, it would be helpful if you could grab a fresh new battery for the UPS. If you could get one, we can use that to test all 20 UPSs that you have. With regards to the serial the 3rd digit up to the 6th would tell us the year and the week that it was manufactured. On the S/N that you have given us, we can tell that it was made on the 41st week of 2007. Hope this helps.

[Anonymous user]

Thanks for the recommendation. I received a new battery. The battery is charged. When I plug the battery into the units the green light comes on. The UPS is not plugged into the wall nor is there any load plugged into it. After a few seconds the red overload light appears and stays steady. This is consistent across all units. Any thoughts?

[BillP · Accepted solution]

lifecycles wrote:
Thanks for the recommendation. I received a new battery. The battery is charged. When I plug the battery into the units the green light comes on.

When you did this, was the unit on or off? If it was off, did you mean that the unit turned on by itself?

lifecycles wrote:
The UPS is not plugged into the wall nor is there any load plugged into it. After a few seconds the red overload light appears and stays steady.

Though the unit was not plugged in on any power source, what was the state of the UPS? Did it went on overload while the unit was off or was it running on battery and then it went to overload?