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Old 09-14-2021, 09:17 PM   #1
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GFCI Issues

Hi All!

2004 Dutch Star 4010

The bathroom GFCI blinking red on battery. It has power at outlet at this time. Test trip and it trips. Try to reset while on battery and it will not.

Turn on shore power, GFCI will reset and light is green. You can trip test and it will reset green.

Turn off shore power and back to first issue. Blinking red and has power. Test trip and it trips. Try to reset while on battery and it will not.

Already replaced GFCI, no change.

Vicious circle. THOUGHTS??

Thanks for any help.
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Old 09-14-2021, 09:36 PM   #2
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Your problem is not with the GFCI. It sounds like you have low power on the inverter, a circuit breaker on the inverter is tripped, or the inverter is off. Have you checked the condition of your house batteries?
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Old 09-14-2021, 10:06 PM   #3
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Quote:
Originally Posted by Lt Dan View Post
Your problem is not with the GFCI. It sounds like you have low power on the inverter, a circuit breaker on the inverter is tripped, or the inverter is off. Have you checked the condition of your house batteries?
I don't think it's low DC input voltage but I think you're right to question the inverter.

Inverters and generators are "separately derived services" in Code-speak, and those services have neutral and ground *bonded*. With shore power, the RV panel is a "sub-panel" and the ground and neutral are NOT bonded at the RV. Transfer switches and inverter AC pass-through switches are supposed to automatically handle this change of bonding. It sounds like this isn't happening and the GFCI is responding accordingly.

There is also a possibility that there is a ground fault with the inverter itself; electronic things can and do fail, sometimes in unexpected ways.
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Old 09-14-2021, 10:18 PM   #4
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Inverter?

I had a similar problem but I was on shore power. The shore power goes to the inverter, comes out on a couple of 120 volt wires, 1 which goes to the GFI plug and subsequently everything in the front of the coach. My inverter was quitting every now and then and when it happened to be “off”, and I tried to trip and reset the gfi it wouldn’t.

I took the inverter in to an electronic repair place and they cleaned up the inside of the inverter and cleaned up some contacts, and then tested it and it’s been running great since. Total cost $80 CDN compared to $2,100 USD for a new inverter.
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Old 09-15-2021, 12:39 AM   #5
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You say you shut off the shore power in your test.

Do you unplug shore power or switch off the breaker ?

Just switching off leaves the ground and neutral connected. That may be causing your issue when the inverter bonds neutral and ground.
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