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Prologic Controller has been losing time for a week and finally stopped all together. I've checked what I can with multimeter. Supercap C3 for power outage seems to charge up. Voltage (approx. 5VDC) on the U2 time clock chip when controller is powered. Time Display has 1 second blinking (Colon)...

I have a pool service which takes care of my pool and spa weekly. I use a qualified specialist to work on problems, pool leaks, equipment malfunctions etc but I (being a retired engineer) can also diagnose controls problems, which I am starting to have with my aging equipment. I find the forums...