Old Hayward GLX-PCB-PRO - anyone knows what is going on here?

amChess

Member
Aug 18, 2024
9
Dallas, TX
Old GLX-PCB-PRO (old, really old 10-20 years) - resuscitated it couple of years ago by resoldering that high amp connection that fails.

T-Cell-15 - the thermistor is reading 6.6 kOhm with temp in 90s - seems reasonable. Washed, re-washed, may have used too much acid - possible that cell's plates are lacking rare earth stuff.

Salt is at 2743 according to the pool store and 2600 according to my little electronic tester. pH is 7.5. CYA is 120 (just learned about the stabilizers two weeks ago).

When the system comes on, I get:
-26.28V -5.53A 91F 2000ppm then drifts down over a minute or so and shuts down
or
+27.60V +2.98A, 91F, 800ppm, then drifts down and shuts down

So, questions - the differences in salt reading between opposite current directions - does that pretty much mean the board is messed up, or can it still be the thermistor on the cell?

Is there another thermistor on the board somewhere?

Tempted to try the bypass like in this post -

Tnx all,
 
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