Re: [Amel Yacht Owners] DC Grounding fault

Mark Pitt

Hi Alan,

  I had the same circumstances a few months ago and went through the steps that Ofer recommends.  No luck.  Then I discovered that when I disconnected the HDMI cable connecting my DC powered PC to my AC power monitor, the ground fault indication went away.  Even connecting devices with a USB cable, such as a printer or GPS, may cause a ground fault if one device is DC powered and the other is AC powered.  


Mark Pitt
Sabbatical III, SM 419, currently in Mallorca, Spain

On Aug 13, 2017, at 11:56 PM, divanz620@... [amelyachtowners] <amelyachtowners@...> wrote:

I wrote about this last year and never found a solution but the problem went away by itself. 

NOW it's back again : MASSE - light comes on when the switch in the companionway is operated.

Meaning there is a connection between 24VDC -ve and the ground system - somewhere.

I've disconnected the macerator pumps, the watermaker DC pump, the anchor wash pump, the refrigerator, no difference. 

What else is there that would have both 24VDC-ve and a ground connected to it that could cause this fault ?



Elyse SM437 

Join to automatically receive all group messages.