AQL-PS-4 Amp +.07 Salt 0000 PPM

What are the first seven characters of the cell and box serial numbers?

Go to the diagnostic screen, note the readings and then press the + button to reverse the polarity.

When the new numbers appear, see what they are.

Then, press + again and note the new readings.

Can you show a good picture of the front and back of the circuit board?
 
Pic when I started the system. After I hit the + button, the Volts went from 29.78 to 29.76 and the Amps went from .07 to .11. Water sensor says 138 degrees. Main software 2.93, Display software 3.00

5L0411-1006015 It's an old system. I replaced the GLX-PCB-MAIN in June 2020
 

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