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APC Back-UPS ES-750 (BE750G)'s battery power ...

Discussion in Back-UPS & Surge Protectors started by Ant , 3/11/2017 5:38 PM
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  • ant
    Apprentice Apprentice
    Ant 3/11/2017 5:38 PM


    Is there a way to disable APC Back-UPS ES-750 (BE750G)'s internal automatic self tests. I am already aware there is a problem with its dead/dying battery to be replaced. Or do I really have to physically open it up to disconnect it? I don't see a way to do it with PowerChute PE v3.0.2 software in my 64-bit Windows 7 HPE SP1 OS.

    Every time it runs self tests, it loses power to its battery plugs and won't come back for many hours (six/6 like a few hours ago). I just want to use it as a power surge protector like with its five battery power plugs when UPS is power connected to a wall outlet for now. Also, why does it not provide battery to these outlets even if the power AC is connected?

    I wonder if this is really a battery issue or an UPS issue. I think I had this UPS since 2008? I cannot seem to find its date it was created. I know this UPS came from Philippines on its bottom label. If I replace its $45 battery, and the problem still happens then I just wasted money and time. :(

    Thank you in advance. :)

  • SecretSquirrel
    Secret Squirrel
    =S= Representative
    Secret Squirrel 3/12/2017 1:48 AM (in response to Ant)

    Hi Ant,

    Unfortunately, there is no way to suspend the Automatic Self test within the unit and we should be able to determine the age of the unit, from the serial number found on the bottom. If you have never changed the battery before, it's a good bet that this is all you'll need to do to be up and running once again. 

    In addition, the battery outlets are controlled by the On/Off switch. If you were to turn the unit on without the battery connected you will receive a constant tone, which by itself would be intolerable. You may however be able to silence this "battery disconnect" alarm through the PowerChute Software, therefore allowing you to use the unit without the annoying constant tone. I'm not 100% sure this will work but it's worth a try.

    Secret Squirrel

  • ant
    Apprentice Apprentice
    Ant 3/12/2017 2:19 AM (in response to Secret Squirrel)

    I figured out its battery age. It was from January 22nd, 2011 according to apcupsd:

    $ /sbin/apcaccess
    APC      : 001,036,0871
    DATE     : 2017-03-11 10:44:49 -0800
    HOSTNAME : MyBox
    VERSION  : 3.14.12 (29 March 2014) debian
    UPSNAME  : MyBox
    CABLE    : USB Cable
    DRIVER   : USB UPS Driver
    UPSMODE  : Stand Alone
    STARTTIME: 2017-03-09 02:40:00 -0800
    MODEL    : Back-UPS ES 750
    LINEV    : 111.0 Volts
    LOADPCT  : 0.0 Percent
    BCHARGE  : 0.0 Percent
    TIMELEFT : 0.0 Minutes
    MBATTCHG : 5 Percent
    MINTIMEL : 3 Minutes
    MAXTIME  : 0 Seconds
    SENSE    : Medium
    LOTRANS  : 92.0 Volts
    HITRANS  : 139.0 Volts
    ALARMDEL : No alarm
    BATTV    : 7.4 Volts
    LASTXFER : Automatic or explicit self test
    NUMXFERS : 0
    TONBATT  : 0 Seconds
    CUMONBATT: 0 Seconds
    STATFLAG : 0x05000048
    SERIALNO : 5B1104[deleted]
    BATTDATE : 2011-01-22
    NOMINV   : 120 Volts
    NOMBATTV : 12.0 Volts
    NOMPOWER : 450 Watts
    FIRMWARE : 841.I3 .D USB FW:I3
    END APC  : 2017-03-11 10:45:21 -0800

    I really wished PowerChute PE provided these details too. :(  Also, I had someone pulled its battery out and I quick tested the battery outlets with the power AC connected. They all worked since they got power. I wonder if the UPS blocked them when battery was bad. I guess UPS is OK? If so, then I will order a new battery (#17) from APC.

  • jeb1969
    Apprentice Apprentice
    john 3/12/2017 1:16 PM (in response to Ant)

    PowerChute PE can provide "some" of these details under the technical data section.

    Looks like the battery age is the same as the unit 6yrs old..

    apcupsd/apctest not sure if that program "apctest" can let you turn off the self test for your unit, it depends on you unit model....

  • ant
    Apprentice Apprentice
    Ant 3/12/2017 6:09 PM (in response to john)
    On 3/12/2017 6:16 AM, john said:

    PowerChute PE can provide "some" of these details under the technical data section.

    Looks like the battery age is the same as the unit 6yrs old..


    Yeah, but not enough details like apcuspd's. :(

  • ant
    Apprentice Apprentice
    Ant 3/14/2017 12:12 AM (in response to Secret Squirrel)

    FYI. I tried these instructions from APC's e-mail support:

    1. Disconnect any attached load.
    2. Turn off the UPS
    3. Unplug the UPS from the wall socket.
    4. Disconnect the UPS internal battery.
    5. Push and hold the "On" button on the UPS for 5 seconds.
    6. Reconnect internal battery.
    7. Plug UPS in to known good power source.
    8. Turn the UPS ON.

    The UPS showed a green light and then vanished with long beeps. I am hoping the new battery won't have this problem (a battery problem, not an UPS problem).

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