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Dell J728N 2700w UPS-Battery disconnected

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    Dell J728N 2700w UPS-Battery disconnected

    Hi .Can anyone help me about this UPS please.
    It wasn't any problem on it before customer said.He just left it on the side for couple of
    months.After they replaced batteries for following use.
    now it says" battery disconnected" alarm #199.
    Batteries voltage is 106v
    charge level level goes up.Thank you.
    Attached Files

    #2
    Re: Dell J728N 2700w UPS-Battery disconnected

    Battery voltage in the menu is 60v 13% goes up.
    Attached Files

    Comment


      #3
      Re: Dell J728N 2700w UPS-Battery disconnected

      wait and see how high it goes .

      Comment


        #4
        Re: Dell J728N 2700w UPS-Battery disconnected

        it has 8x12v batteries . best check voltage on each one

        Comment


          #5
          Re: Dell J728N 2700w UPS-Battery disconnected

          Battery pack has 106v.Every battery have 13.24-13.27 volts
          Last edited by djems3; 04-07-2021, 12:18 PM.

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            #6
            Re: Dell J728N 2700w UPS-Battery disconnected

            check the fuses and see if there is a reset procedure

            Comment


              #7
              Re: Dell J728N 2700w UPS-Battery disconnected

              When i start outputs in 3-5 sek. start " Alarm #28 DC link Over voltage"

              Comment


                #8
                Re: Dell J728N 2700w UPS-Battery disconnected

                All fuses are ok.I've done reset of alarms and factory reset.

                Comment


                  #9
                  Re: Dell J728N 2700w UPS-Battery disconnected

                  Does someone has schematic for this model or any similar please.Thank you.
                  Last edited by djems3; 04-07-2021, 01:06 PM.

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                    #10
                    Re: Dell J728N 2700w UPS-Battery disconnected

                    Thank you Petehall347 for your answer.I've done it. Problem was broken way between
                    R17 and R18 because of moisture.
                    Attached Files

                    Comment


                      #11
                      Re: Dell J728N 2700w UPS-Battery disconnected

                      i guess it became a fuse .

                      Comment


                        #12
                        Re: Dell J728N 2700w UPS-Battery disconnected

                        NO broken path between them.Broken connection because of corrosion .From
                        this resistors reading battery voltage R17-R18 and R27-R28.
                        Last edited by djems3; 04-12-2021, 11:57 AM.

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