Sorry for the long post.
We've had our pool for about 8 years now. At the time, we installed top of the line Pentair equipment. Aside from the Salt Chlorinator (IC40), which I gave up on long ago after going through multiple of them in a short period of time, the equipment has been working pretty good. About two months ago, I noticed both (one in the pool and one in the spa) spa side remotes (IS10) started acting very odd until they both stopped working. Then one day I noticed that the pumps were not running. I went out to examine and noticed that the 12v breaker on the personality board was tripped. I reset it and started things back up, but it tripped again. By process of elimination, I determined the perhaps the IS10's were causing the issue, so I disconnected both of them from he COM serial ports and that seemed to fix the problem. Fast forward to today. I was in the other room and kept hearing the touch panel beep every few seconds. Upon examining, it looked like it was turning on and off. I went out and it appeared that the pumps weren't on either and somehow it was in service mode. I power cycled things and then put it back to auto. The touch panel in the house came back on, but now the Variable Speed Pump (Out main filter pump) was turning on, and seemed like it was struggling to prime, even though it looked as though it was primed just fine. It kept on jumping up in speed and then would drop down and slowly start ramping up until eventually it just stopped with a priming alert. After checking plumping and cleaning out everything, I gave it another shot...Same thing! I started to think something was wrong with the pump. I decided to disconnect the pump from the Intellitouch by unplugging the cable that goes into the COM port and then just ran the pump in filter mode on it's own. It worked fine! Is it possible the COM port on the PCB circuit board is causing everything to go haywire. Any advice or tips? Has anyone ever replaced the circuitry on the COM ports. I'm think perhaps one of the IS10's damaged the circuitry. Thanks in advance.