I think I’ve figured out why MT.Net’s webserver shuts down mysteriously in the mornings. The power company sends a burst signal through the lines when it wants to control the demand-side appliances, such as water heaters, to save electricity. This burst always makes my UPS complain, as it misinterprets it as a power outage. What I’m thinking is that after ten years of life, the UPS’s batteries have finally drained to the point that they can’t even ride over this split-second power fluctuation.
I’m going to plug the server directly in to the outlet to see if that helps.
What I’m thinking is that after ten years of life, the UPS’s batteries have finally drained to the point that they can’t even ride over this split-second power fluctuation.
If your UPS’s batteries are that old, they’re long overdue for replacement. A new set of batteries should take care of the problem. You can probably find decent, inexpensive replacements on eBay.
I’m going to plug the server directly in to the outlet to see if that helps.
I’d recommend using a surge protector, especially if they’re doing funny things with your electricity.
The thing they’re doing is sending a double-sine wave pulse, which is enough to get the attention of the DSM equipment, but not enough for most appliances to even notice. It always kicks off the UPS buzzer, though, and (I assume) kicks it to battery backup for a second.
After ten years of two-a-day bursts, plus your occasional hurricane or ice storm, this little UPS is probably worn out.
It’s an old APC model which did not have replaceable cells. I’ll probably wind up prying out the dead cells and send them to a recycling center. The rest I’ll trash.
Sniff.