AquaPure 1400 code 120

Check the cord make sure it’s not damaged.

You may want to read this old thread

https://www.troublefreepool.com/threads/131218-Aquapure-1400-Code-120



Ok. Found a diagnostic flowchart. This is what I get for the values I could test


110 dc millivolts at H and K front board
21 VAC at A and C ON front board

34 VDC backboard
33.7 VDC at cell poles (I couldn’t get a good test on the cell side of the wiring for some reason but with it plugged in and “lifted” enough to get at the power connections on the cell)
 
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