Persistent AC Output Backfeed error on Outback VFX 3648

AlanRT
AlanRT Solar Expert Posts: 57 ✭✭✭✭
in Advanced Solar Electric Technical Forum #1
I am getting an AC Output Backfeed error on a VFX 3648. Nothing was changed except that we added 2 panels the same day it started acting up. We made no other changes to the system or disconnected any other cables except the panel interconnects.

Configuration:

1 VFX 3648 Inverter
1 MX 60 Charge controller
16 L16 batteries
8 140 watt Kyocera panels.

The inverter has a generator backup.

Even with AC inputs and Output wires totally disconnected, I am getting this error recurring. Only the two battery cables are connected and a chassis ground. Turned off and on using a Mate. The inverter stays on for 5 seconds and reverts to the error. Disconnected the batteries for 10 seconds to allow the inverter to cycle down. Error persists. I put the inverter on an entirely new system to test but it gets the same error. Sound like a hardware failure?

Alan Thompson
Todos Santos Technologies
Todos Santos, Baja California Sur, Mexico
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Comments

  • niel
    niel Solar Expert Posts: 10,300 ✭✭✭✭
    #2
    Re: Persistent AC Output Backfeed error on Outback VFX 3648

    this sounds like something went amiss. you better get in touch with outback. http://www.outbackpower.com/contact.htm
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  • crewzer
    crewzer Registered Users, Solar Expert Posts: 1,832 ✭✭✭✭
    #3
    Re: Persistent AC Output Backfeed error on Outback VFX 3648

    Alan,

    As you are probably aware, here's the OutBack inverter manual's (rev 7.2, pg. 46) expanation for the "Backfeed error":
    AC OUTPUT BACKFEED indicates that another AC source of power was connected to the AC
    output of the FX. Usually this is an installation issue. It often occurs when there is an X-240
    transformer in the system that hasn’t been installed properly. Also, check that there are no
    connections between the AC input and AC output circuitry.

    You can also register and post over on OutBack's forum. Lots of smart/experienced folks over there as well, but with a greater focus on OutBack products. See: http://www.outbackpower.com/forum/index.php

    HTH,
    Jim / crewzer
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  • AlanRT
    AlanRT Solar Expert Posts: 57 ✭✭✭✭
    #4
    Re: Persistent AC Output Backfeed error on Outback VFX 3648

    Thanks, All,

    The inverter definitely went south. A new inverter had no problems.

    Will contact Outback TS for help.

    Alan
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  • DLwindsun
    DLwindsun Administrators Posts: 34 admin
    #5
    Re: Persistent AC Output Backfeed error on Outback VFX 3648

    If you call Outback they will have new boards to you within 7days normally, they take care of their customers.
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