Thanks for all the advice. An electrician came out and looked, and left bewildered. He really wasn't familiar with the AquaLogic system, but he hooked and unhooked things and kept testing the volts/amps and showed me how they weren't what they were supposed to be. The waterfall pump would get as hot as Titanium mentioned almost immediately, but the regular Jandy filter was hotter than it should have been, too. At first the electrician thought that the wire to the AquaLogic and breaker box was the wrong gauge; then the box wasn't big enough to handle the breakers, etc. He was guessing every thing he could think of. I was a little confused though since the pool builder's electrician should have done all of that right since he did it often . (It was the pool builder who goofed up most of the time). The electrician left with the idea I needed to run new wires to the whole thing.
It rained all afternoon so I couldn't take pictures or try anything else.
But I did read the manual AGAIN. Suddenly the words seemed to jump off the page." If you experience low voltage, call your power company." I did and explained the problem. At first they told me to get an electrician but when I explained it was a low voltage issue and "the book" insisted I call them, they sent out a man within an hour. He went to the underground box from the subdivision, and said, "Well this is your problem." The box had been cracked and the neutral (ground) was corroded and not making contact. He told me it probably had been that way for a long time and could easily have been the reason the SWG never seemed to make chlorine like it should, the lights wouldn't work, the waterfall motor went out, and we replaced so many motherboards, etc. He'll be back tomorrow and we'll see what happens next. I NEVER would have guessed that could have been the problem. Oh, and he said it was a miracle we weren't electrocuted when we changed the pump. Great! So we're waiting till tomorrow to see the next part of this story unfold.
See...sometimes it pays to READ!! 
Now we'll see what happens tomorrow.
Thanks y'all! We've all had a brain workout!!
jeannebbooks
18,000 (really 24,000) gallons inground irregular shape,flagstone coping, Sundeck, AquaLogic SWG, Polaris 380, Jandy CL 340 filter, Jandy pump, Rico Rock and flagstone waterfall with new Hayward Power Flo LX pump replacing a Pentair Dynamo.
new and learning!
South Louisiana
The inside wall remote unit is mounted next to the phone jack and the fax machine/printer! Seems that the builder would have thought of that when he put it there, but ...
