SRC1KUXI suddenly trips sometimes

[rajil.s_apc]

Hello,

I have a SRC1KUXI 800W online UPS. It has recently started tripping off when main goes off. I have checked the two SMF batteries attached and they showed 13.20V and 13.23V respectively. A self-test on the UPS comes out ok.

Here is a video after it has tripped,

https://i.imgur.com/4t4AaDS.mp4

The host is running apcupsd. This is what i get from a running system,

$apcaccess
APC      : 001,038,0930
DATE     : 2022-04-30 23:56:31 +0530  
HOSTNAME : nas
VERSION  : 3.14.14 (31 May 2016) unknown
UPSNAME  : pfsense
CABLE    : Ethernet Link
DRIVER   : NETWORK UPS Driver
UPSMODE  : Stand Alone
STARTTIME: 2022-04-30 23:27:28 +0530  
MASTERUPD: 2022-04-30 23:56:31 +0530  
MASTER   : x.x.x.x:3551
MODEL    : SRC1KUXI
STATUS   : ONLINE
LINEV    : 236.1 Volts
LOADPCT  : 55.0 Percent
BCHARGE  : 95.0 Percent
TIMELEFT : 175.0 Minutes
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME  : 0 Seconds
OUTPUTV  : 236.2 Volts
LOTRANS  : 160.0 Volts
HITRANS  : 265.0 Volts
RETPCT   : 60.0 Percent
ITEMP    : 40.0 C
BATTV    : 28.8 Volts
LINEFREQ : 50.0 Hz
LASTXFER : Automatic or explicit self test
NUMXFERS : 0
TONBATT  : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
SELFTEST : NO
STATFLAG : 0x05000408
BATTDATE : 2018-09-19
NOMOUTV  : 230 Volts
NOMBATTV : 24.0 Volts
END APC  : 2022-04-30 23:57:27 +0530  

The UPS is only loaded 55%. Any idea what could be the issue?

Thanks

[JonPro]

Hi @rajil.s_apc 

Thank you for reaching out to the SE Community, my name is Jon and I will assist you with this query.  Apologies for the late revert on this post of yours.

If you are still experiencing this issue with your UPS, may I know if we can remove the load attached to the UPS and then unplug the unit from the power source?