I have a Back-UPS XS 900 on a standalone Debian server that seems to randomly start sounding a constant overload alarm, even with nothing plugged in. The alarm continues to sound until I manually turn the unit off. Additionally, nothing seems to be logged when the alarm starts to sound.
Here is the output from
apcaccess while alarm is sounding an nothing is plugged in. The BATTDATE should actually be 2007-07-05, but
apcaccess is reporting it incorrectly (the correct value is returned if I query it in
apctest). The only difference appears to be that STATUS changes from ONLINE to a blank value.
APC : 001,038,0925 DATE : Sat Dec 05 16:37:38 MST 2009 HOSTNAME : kamui RELEASE : 3.14.4 VERSION : 3.14.4 (18 May 2008) debian UPSNAME : kamui CABLE : USB Cable MODEL : Back-UPS XS 900 UPSMODE : Stand Alone STARTTIME: Sat Dec 05 16:22:24 MST 2009 STATUS : LINEV : 117.0 Volts LOADPCT : 0.0 Percent Load Capacity BCHARGE : 094.0 Percent TIMELEFT : 557.7 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds SENSE : Medium LOTRANS : 088.0 Volts HITRANS : 139.0 Volts ALARMDEL : Always BATTV : 25.4 Volts LASTXFER : No transfers since turnon NUMXFERS : 0 TONBATT : 0 seconds CUMONBATT: 0 seconds XOFFBATT : N/A SELFTEST : NO STATFLAG : 0x07000000 Status Flag MANDATE : 2007-07-05 SERIALNO : [removed] BATTDATE : 2145-00-36 NOMINV : 120 Volts NOMBATTV : 24.0 Volts NOMPOWER : 540 Watts FIRMWARE : 830.E6 .D USB FW:E6 APCMODEL : Back-UPS XS 900 END APC : Sat Dec 05 16:37:48 MST 2009
I have already tried it without anything plugged into it and with the server alone. I have also used a Kill A Watt to measure the outlet voltage and it measured 117.4 V when I tested it and the alarm began to sound.
Is there anything else I can check?
EDIT: The lights that show up when this happens is the blinking red overload light and nothing else.