AquaLogic lightning problem

[STEPHAN]

Thanks for your help!

So, I checked the wiring.

The pool pump, the gas heater, the pool light transformer case and the control unit (Aqua Rite) all have their own grounding through a ground wire that goes from the metal case. Unfortunately I can only see the ground wires go into gray pipes. Pavers were put in later on. But everything was installed by a professional pool company and inspected.

The house has a surge protector installed by a professional electrician. I had an additional one installed on the pool control. All electrical wiring goes from the main control to the other devices like pool pump, heater etc. Everything uses the green “ground” wire in the electrical cable.

[PoolDoc]

I think you're misunderstanding -- grounding and bonding are similar, but separate. They are installed separately, and mandated under different parts of the electrical code. It's possible, has not always been required to join them. They are INTRINSICALLY connected, via equipment casings, at locations like pump motors that are required to be BOTH bonded AND grounded.

Here are some links you may want to check out:

http://www.poolforum.com/pf2/showthread.php?15099
http://www.poolforum.com/pf2/showthread.php?5210

http://forums.mikeholt.com/showthread.php?t=95495
http://forums.mikeholt.com/showthread.php?t=104422
http://www.erico.com/public/library/fep/LT1242.pdf

[STEPHAN]

I might be wrong, but I think that I did get it.

That’s why I wrote 2 separate paragraphs. I might have explained it wrong.

One on the ground wires going from the metal cases directly into the ground (not insulated) and one on the green insulated wires that are connecting all devices.

[STEPHAN]

So, I spend a lot of time reading all the links you suggested.

I now understand the difference in terminology. BONDING and GROUNDING.

If I got it correct, my lightening problems might be mainly a GROUNDING issue.

Any way I can check if everything is correctly grounded?

(I once had a customer who had everything "grounded" by a wire to and old metal pipe - but it was cut and not in use)

[STEPHAN]

@westom

The manufacturer took the board and replaced it. I was not able to keep it. I carefully inspected the board and it had absolutely no visible damage on both sides. There was a 3 amp fuse for the low voltage part that was blown. A 20 amp fuse for the high voltage part was okay. The technician disconnected all devices from the board and we replaced the fuse. I blew right away. So the error was on the board itself.