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Topic: Inverter - AC Backfeed Fault (Read 601 times) previous topic - next topic

Inverter - AC Backfeed Fault

I don't often run the AC's off the generator, but when I do, I've been getting this fault. The fault shuts down the inverter of course but while the generator is running everything continues to work as far as I can tell.  The fault is easily cleared, sometimes it comes back quickly, sometimes it doesn't.  When hooked up to shore power, I can run all three ACs and do not get any faults.  Thoughts?
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Inverter - AC Backfeed Fault

Reply #1 –
Not an Expert, but I would think:

As soon as you start your generator, your "Inverter ON" light should go off, and the "AC In/Charge" light should illuminate.  This is handled by the ATS inside the Xantrex.

What light comes on when you clear the fault light?

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Inverter - AC Backfeed Fault

Reply #2 –
Quote from: Chuck & Jeannie –
>>>As soon as you start your generator, your "Inverter ON" light should go off, and the "AC In/Charge" light should illuminate.<<<

Correct.  AC in/Charge light comes on.  Proper voltage shows on both lines on the power line monitor.  Fault does not occur immediately.  When fault is cleared, with gen running, light goes back to AC in/Charge then may or may not fault again in a few minutes/hours.
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Inverter - AC Backfeed Fault

Reply #3 –
Above my pay grade.  Best wait for the Experts to respond.  8)

1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Inverter - AC Backfeed Fault

Reply #4 –
A quick Google points to a possible internal transfer switch issue in the inverter

Backfeed fault — northernarizona-windandsun

https://www.meridianyachtowners.com/threads/xantrex-rs3000-f29-error.7285/

https://www.meridianyachtowners.com/threads/580-inverter.7079/
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Inverter - AC Backfeed Fault

Reply #5 –
Quote from: Michelle –
>>>A quick Google points to a possible internal transfer switch issue in the inverter <<<
Thanks....I think.  They all seem to indicate that it's time to replace the Xantrex. 
Dan & Lauren - Pine Ridge, FL
2000 U320 42 CAI
Build #5766

Re: Inverter - AC Backfeed Fault

Reply #6 –
Quote from: Blueeyedme –
Thanks....I think.  They all seem to indicate that it's time to replace the Xantrex. 


If you're not aware, Alan at Bay Marine offers forum members discounts on (I think) Magnum and Victron.  Check with them via the Commercial Listings board Chargers, inverters, and refrigerators
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Inverter - AC Backfeed Fault

Reply #7 –
Bay Marine has no Magnum products on there web site today.  Plenty of Victron equipment.

If you are ordering on line from Bay Marine Supply use the coupon code ffmember to get the discount.

Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN