ProMariner ProSafe Galvanic Isolator Monitor AC Line 2 "Fail"

Arrived at our new to us marina with our new to us IP420-92. This is my first "Rookie Request"! On board is a ProMariner ProSafe Galvanic Isolator Monitor (please see the attached picture). The AC Line 2 indicated a Galvanic Isolator "Fail". All else was "Normal". Although, I don't recall what if anything the Bonding System Protection indicated (it might have just been blank or Normal). I believe during the boat's survey both AC Line 1 & 2 were functioning properly. I'm plugged into a 50amp source with splitter. I tested the two lines with the Marinco circuit tester, which indicated normal. When the Fail showed-up, I switched off AC Line 2. Any idea what I should do to investigate this Galvanic Isolator Fail? Thanks Dan.

dcreasoner ,
I have a few of thoughts:

1. It is a new dock so you don't know what you have, I would borrow another 50 AMP cable and see if you get the same results.
2. I would disconnect and reconnect the cables to the boat, the splitter, and the breaker, all of them. I think you implied that there were two 30 amps at the boat - combined to a 50 at the dock? Regardless disconnect all inspect for cleanliness and burns and then reconnect.
3. With the 50 Amp borrowed cord for step one connect to another dock outlet as far as you can get from the one you are on.
4. If none of that fixes it, Then I would work through the promariner trouble shooting portion of their manual j109.org/docs/ProSafe-One-Manual.pdf, Seems like it is pretty detailed. My limited experience with galvanic isolators is that a small amount of corrosion on their connections can cause problems. They seem to be a pile of Zener diodes with very low thresholds and can't distinguish corrosion from open connections.

Remember - "free advice is worth the price" , At any rate, Good Luck
George
S/V Delicia

I believe I have found the culprit to my Galvanic Isolator "Fail"! The test on this ProSave ZincSaver 30 indicates one of the diodes is bad. It does not look fixable, but I'll check with ProMariner. I need to get it fixed or find a replacement.