Zinc Saver II Galvanic Isolator gone bad

[ZZ13]

I recently had my bottom zinc wear faster than normal. We've had a lot of violent electrical storms around here lately so I decided to test both the galvanic isolators. Sure enough one tested at 0V indicating both diodes are shot. The other tested fine, but immediately read .917V. It was not a slow ramp up. Do any of you know if these older units have capacitors in them? I guess I will just go ahead and replace both of them. Looks like Guest and Promariner are the two common options. Are there any other suggestions?

I am assuming since this is a 2001 install, that these galvanic isolators do not meet the 2009 ABYC fail safe requirement. So what risks do I have now keeping shore power on the failed side until I can buy and install the new one?

 

[ZZ13]

I guess there are no amateur electricians in this group. Anyway, mine is shorted closed. So there is still continuity, just no diode function. I am not getting an galvanic isolation but I am getting proper grounding of the 110V ground wire. I ended up ordering a Guest 30amp unit because its terminal posts were oriented the same as the original device, in a side by side manner. Then I don't have to make any modifications/extensions to the wire ends. The Promariner unit puts the terminals on opposing ends of the unit.

 

[HUMPH]

Sounds like the right thing to do. Probably best to replace rather than to try and repair a device that is so critical to safety.

 

[ZZ13]

I finally got a new galvanic isolator and installed it. As you can see the new one is a bit smaller. Then I took apart the bad one and its nothing but two $5 rectifiers and some heavy current wires. I found the exact replacement rectifiers at Allied Electronics for only $4.87 each. I think I am going to buy a couple and repair this one.