[Nut-upsuser] APC UPS: replacement battery always triggers shutdown
jshaio at yahoo.com
Sun Nov 11 15:21:35 UTC 2012
I've been using nut on an APC Back-UPS 750 for several years with no problem, seeing the walled "UPS on battery power"
messages during short 1-2 minute outages. This is connected with the original USB cable that came with the unit.
After replacing the battery recently, nut always triggers a shutdown when AC power is cut off, even if only for 1 minute.
I see that the data fields reported by nut have not changed (details below) and the runtime is stuck at 0, even with 35% charge. This runtime is an incorrect
reading as I verified that stopping nut and cutting off AC power does indeed keep my computer running. It is only nut that thinks the runtime is 0 and triggers
FAQs #37, #38 on networkupstools.org are related to this issue:
I followed this procedure (charging the battery fully, letting it drain off a token load while UPS is grounded on a surge protector) but it did not help.
Perhaps I missed something running this procedure; if anyone has suggestions for solving this they'd be greatly appreciated.
I'm using nut-2.6.4-1 on debian linux (testing distribution, kernel 3.1.0-1).
Here are the details I see:
=> upsc apc
battery.mfr.date: 2008/01/25 <<<<<<<<<< battery bought 11/01/2012 ??
battery.runtime: 0 <<<<<<<<<< runtime = 0 with 35% charge above?
device.mfr: American Power Conversion
device.model: Back-UPS ES 750
driver.version.data: APC HID 0.95
ups.firmware: 841.I2 .D
ups.mfr: American Power Conversion
ups.model: Back-UPS ES 750
ups.status: OL CHRG LB <<<<<<<<<<<<<<< see FAQ #37, 38
ups.test.result: No test initiated
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