Dell J728N 2700w UPS-Battery disconnected

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  • djems3
    Member
    • Nov 2014
    • 32
    • United Kingdom
    #1

    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

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    Tags: None
    • djems3
      Member
      • Nov 2014
      • 32
      • United Kingdom
      #2
      Re: Dell J728N 2700w UPS-Battery disconnected

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

      if you find these attachements useful please consider making a small donation to the site

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        • petehall347
          Badcaps Legend
          • Jan 2015
          • 4451
          • United Kingdom
          #3
          Re: Dell J728N 2700w UPS-Battery disconnected

          wait and see how high it goes .

            Comment

            • petehall347
              Badcaps Legend
              • Jan 2015
              • 4451
              • United Kingdom
              #4
              Re: Dell J728N 2700w UPS-Battery disconnected

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

                Comment

                • djems3
                  Member
                  • Nov 2014
                  • 32
                  • United Kingdom
                  #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.

                    Comment

                    • petehall347
                      Badcaps Legend
                      • Jan 2015
                      • 4451
                      • United Kingdom
                      #6
                      Re: Dell J728N 2700w UPS-Battery disconnected

                      check the fuses and see if there is a reset procedure

                        Comment

                        • djems3
                          Member
                          • Nov 2014
                          • 32
                          • United Kingdom
                          #7
                          Re: Dell J728N 2700w UPS-Battery disconnected

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

                            Comment

                            • djems3
                              Member
                              • Nov 2014
                              • 32
                              • United Kingdom
                              #8
                              Re: Dell J728N 2700w UPS-Battery disconnected

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

                                Comment

                                • djems3
                                  Member
                                  • Nov 2014
                                  • 32
                                  • United Kingdom
                                  #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.

                                    Comment

                                    • djems3
                                      Member
                                      • Nov 2014
                                      • 32
                                      • United Kingdom
                                      #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

                                      if you find these attachements useful please consider making a small donation to the site

                                        Comment

                                        • petehall347
                                          Badcaps Legend
                                          • Jan 2015
                                          • 4451
                                          • United Kingdom
                                          #11
                                          Re: Dell J728N 2700w UPS-Battery disconnected

                                          i guess it became a fuse .

                                            Comment

                                            • djems3
                                              Member
                                              • Nov 2014
                                              • 32
                                              • United Kingdom
                                              #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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