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OPUS 120W -1 green flashing led

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  • OPUS 120W -1 green flashing led

    Hi All,

    I have an OPUS 120W power supply with VIA EPIA SP13000 Nehemiah Mainboard.

    My car is BMW 320D with standard kit.

    My OPUS is wired using 8AWG wire, 2x +ve direct to battery and 2x -ve direct to battery.

    I have 12v ignition direct to OPUS.

    I am getting 1 green flashing LED which indicates the battery is below expected voltage. I have used the factory jumper settings as my battery should fall into this category.

    What am I doing wrong?

    I purchased it from linitx and have emailed both them and also OPUS directly for some tech support.

    I have previously had a carpc but was using the carnetix psu and this was working fine.

    PLEASE HELP SOMEONE....

    Thanks in advance,
    Paul.
    BMW E46 (year 2000)
    CARPC installed and working!!

  • #2
    is there not a resistor that you twist to up the voltage, is this with the car runniing or not?

    Comment


    • #3
      It is when the car ignition is on or off.
      it doesnt matter.

      There is no resistor. Just the jumper to set the startup and shutdown voltage.
      BMW E46 (year 2000)
      CARPC installed and working!!

      Comment


      • #4
        Get a multimeter and measure the voltage on your +12v line.
        You also didn't mention what you used to wire to the ACC line. Did you wire the ACC line to an IGN-controlled 12v source?
        Have you looked in the FAQ yet?
        How about the Wiki?



        Under normal circumstances, a signature would go here.

        Comment


        • #5
          I think one flashing green light is just "standby", ie: no trigger from the ACC line. As mentioned before, use a multimeter to check your input voltages.
          2007 Honda Fit Sport 1.5L SOHC-VTEC

          Comment


          • #6
            Hi,

            Late reply but i've just got back from holiday.
            I've finally checked the input voltage and its 12.35V direct from battery.

            I am still having the same problems. Any more ideas?

            Thanks in advance,
            Paul.
            BMW E46 (year 2000)
            CARPC installed and working!!

            Comment


            • #7
              As binary said, one flashing should be just the standby mode for the PSU...
              Does the unit start when you turn ACC on?

              Comment


              • #8
                I dont get any response other than the green flashing light.
                No fans on my mainboard turn or any other activity.

                Thanks,
                Paul.
                BMW E46 (year 2000)
                CARPC installed and working!!

                Comment


                • #9
                  Did you check if you inverted +12 Bat and ACC?

                  I had a similar problem, and it was related to the fact I had inverted the two (on my 150W which should be about the same...).
                  I would also check the power button cable from the opus unit to the mainboard, maybe try it with a regular button and work from there.

                  Comment


                  • #10
                    Check to make sure the ACC on the Opus is connected to a switched ignition wire and not a constant 12 volts. You need to have the Opus 12v constant and ground connected for about 5 or 10 seconds before putting 12 volts to the ACC (turning on the ignition), or it will not power up.

                    Comment


                    • #11
                      Hi,

                      My wire is connected to the ignition wire but I double checked the ignition wire with a multimeter and I am getting no voltage.

                      Can you provide any suggestions???

                      Thanks,
                      Paul.
                      BMW E46 (year 2000)
                      CARPC installed and working!!

                      Comment


                      • #12
                        IGN is only supposed to provide current when you are cranking your engine if I'm not mistaken (key turned all the way to start the engine and make the starter spin).
                        You're supposed to connect the yellow (red going to 12V bat if I remember correctly) wire to ACC which will give you constant 12V when your car is on (usually the key position before the crank)

                        Check to see if you get current on that one.
                        What can be done is either wire it from your cigarette lighter which is usually relayed by ACC (though I don't know how much current is drawn by the opus unit on that circuit) or wire it from the key wire for 12V ACC.

                        Good luck

                        Comment


                        • #13
                          I have checked the voltage of the IGN wire (thats the wire in my dash) when I turn the key and it still remains at 0V.

                          I've checked the Cigarette lighter and it provides 12V when Ignition is turned.

                          I dont really want to use this but will if its my only option.

                          Do you know if the IGN wire uses a fuse?

                          Thanks.
                          BMW E46 (year 2000)
                          CARPC installed and working!!

                          Comment


                          • #14
                            I believe you are confusing IGN and ACC.
                            IGN will just go high (will read 12V on the multimeter) when you crank the engine. It is only intended to get the engine running (by spinning the starter).

                            ACC is the wire you need for your unit, since the Opus units detect when ACC goes hi or lo in order to start/shutdown the system (when ACC goes hi [12V], it sends it shorts momentarily the power switch connections and monitors that the system is running. When ACC goes lo [0V] it shorts power switch connectors again after 10s, or whatever delay you have with the jumpers)

                            Now if you don't get 12V on ACC when they key is turned, nothing would work in your car (ie. no cig lighter, no interior lights, no fans, no nothing).
                            Make sure you have the wire that comes out of ACC and not IGN.

                            It shouldn't matter if IGN is fused or not, I don't believe the current drawn by opus would make it blow.

                            Here is a diagram:


                            You will notice IGN goes to the starter circuit and will read 12V only when they key is turned all the way. That is NOT the wire you need.
                            You need ACC that is directed to the fusebox that will get 12V constant when the car is in the ON position.


                            OFF ---- [0V] -> steady key position
                            ACC ---- [12V Constant to fusebox] -> Steady Key position
                            IGN ---- [12V while key is on position] |
                            STRT --- [12V to starter while key is in position] | These two modes will spring the key back to ACC

                            Comment


                            • #15
                              Here's a post I found:
                              http://www.mp3car.com/vbulletin/powe...s-bmw-e46.html

                              Here's for the wiring you'll be looking for:
                              http://www.projectbimmer.com/BmwWiring.htm

                              Comment

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