Hello everybody, new here so I apologize if I’m posting at a wrong place etc. I tried to explain and isolate the thread with details in title.
This happened after a recent rain storm and can’t locate a replacement board or the upgrade kit due to shortages. Couldn’t find a similar issue In the posts to pinpoint the problem. Closest was Bradalan’s Pentair I9 motherboard post but my c/b are not popped.
My control unit details are: Pentair EasyTouch PL4/PSL4 P/N 522353 Dated 10/27/2020 PCBA 522523, firmware P/N 522456 Ver.1.02 has backlight, all 4 LED’s on no circuit breakers popped no display, can’t reset.
Just an in ground pool with filter pump, booster pump and pool lights connected, of course all stopped working now. Disconnected everything but the power plug with no difference. 10,18,24 Vac reading 14~16, 19, 24~28 respectively. U2 Volatage regulator Pin 1&2 reading 30, Pin 1&3 reading 1084 with my cheap meter (No beep function).
I‘ve changed the BR2 chip because it was cheap and because of the U2 reading. But couldn’t locate the U2 chip because I can’t read the numbers to locate.
Can anybody help with that and let me know if anything else could be causing it? I hear sometimes the eprom gets stuck but I can’t reset it. Would the board behave this way if that’s it?
I’ll attach photos of my board perhaps somebody can tell me if and what kind of voltage regulator I might need too.
This happened after a recent rain storm and can’t locate a replacement board or the upgrade kit due to shortages. Couldn’t find a similar issue In the posts to pinpoint the problem. Closest was Bradalan’s Pentair I9 motherboard post but my c/b are not popped.
My control unit details are: Pentair EasyTouch PL4/PSL4 P/N 522353 Dated 10/27/2020 PCBA 522523, firmware P/N 522456 Ver.1.02 has backlight, all 4 LED’s on no circuit breakers popped no display, can’t reset.
Just an in ground pool with filter pump, booster pump and pool lights connected, of course all stopped working now. Disconnected everything but the power plug with no difference. 10,18,24 Vac reading 14~16, 19, 24~28 respectively. U2 Volatage regulator Pin 1&2 reading 30, Pin 1&3 reading 1084 with my cheap meter (No beep function).
I‘ve changed the BR2 chip because it was cheap and because of the U2 reading. But couldn’t locate the U2 chip because I can’t read the numbers to locate.
Can anybody help with that and let me know if anything else could be causing it? I hear sometimes the eprom gets stuck but I can’t reset it. Would the board behave this way if that’s it?
I’ll attach photos of my board perhaps somebody can tell me if and what kind of voltage regulator I might need too.

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