Jandy Aquapure 1400 Error 120

[mcinlb]

Our Jandy Aquapure 1400 has started to throw general fault code 120. The first time it happened, I cleaned the cell and it seemed to settle down for a couple of days. Now it seems like it is happening every time we run it.

I've checked the voltage at the cell and when it is running w/o the error code, it is showing 28V. Once the error code pops up, I am seeing 34V.

Based on the serial number, it looks like the cell was manufactured in 2016 (Has an H16XXXX SN).

Is there anything else I should be checking, or is it time to pick up a new cell? Thanks!

 

[RJ-45]

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[JamesW]

Jandy salt reading way off the charts

So my aqualink is telling me the salt is at 4700ppm, my Taylor test kit says 3800PPM. this is after I cleaned the sensor on the salt cell, before cleaning it’s was reading low salt at 1700ppm? cell is coming up on 5 years old.

www.troublefreepool.com

 

[JamesW]

Check the amperage.

 

[mcinlb]

Did some addiitonal troubleshooting.. checked the test point on the power board. Should be 120mv, getting 121-121.5mv. Not sure how far off that is. Checked the pins, they seem to be tight except for the middle pin which has a little bit of wiggle/looseness to it.

 

[JamesW]

Check the amperage.

 

[PoolGate]

The way these cells typically fail is the center electrode corrodes through and eventually totally separates. They cannot be repaired even though the plates may have life left in them.

 

[mcinlb]

@JamesW meter is showing 5.52Amp

 

[JamesW]

@JamesW meter is showing 5.52Amp

That is an OK amperage.

It's likely to be an intermittent code.

Check the center plate where the center prong connects to the center plate.

Remove the two screws holding down the plate over the prongs and check the base of the prongs.

 

[mcinlb]

@JamesW

Checked the base of the prongs under the cover and they are clean.

noticed that the amperage in regular (non cell reversing mode) is only 4.64 amp w/34V at the cell.

in reversing mode, the amps are at 5.52 w/ 28V at the cell,

 

[JamesW]

OK, I don't know the exact amperage that triggers the 120 code, but the difference indicates that one polarity is failing.

It's probably time for a new cell.

You might be able to get a little bit more life if you raise the salinity, but it would only be a temporary solution.

 

[mcinlb]

OK, I don't know the exact amperage that triggers the 120 code, but the difference indicates that one polarity is failing.

It's probably time for a new cell.

You might be able to get a little bit more life if you raise the salinity, but it would only be a temporary solution.

Thanks. Prongs under the cover plate.

 

[JamesW]

OK, that looks good.

Check the plates inside the cell for signs of corrosion.

In any case, the amperage indicates a failing cell.

 

[mcinlb]

Thank you @JamesW.

 

[mcinlb]

Worked for a while yesterday.. threw another 120 code today, but it's still generating chlorine (bubbles coming out of the return). Looks like it may be time for a new cell.

 

[JamesW]

Check the amperage when the 120 code comes on.

 

[mcinlb]

@JamesW Amperage when 120 error comes on is ~4.6x amps

 

[PoolGate]

This is pretty much exactly how mine failed. One or more of the 3 leads on the cell are corroded almost completely through. They will seem totally solid until or if you take apart the cell to look. It is not serviceable, I am just pointing out that the cell is toast. It is not fixable.

 

[JamesW]

@JamesW Amperage when 120 error comes on is ~4.6x amps

Ok, I don't know if the amperage is a single number or if it is relative to the salinity.

I agree that the cell is basically gone.

You might be able to get a few more weeks by raising the salinity, but it might not help at all.

Do you know for sure what the actual salinity is?

What does the box say for salinity?

 

[PoolGate]

Ok, I don't know if the amperage is a single number or if it is relative to the salinity.

I agree that the cell is basically gone.

You might be able to get a few more weeks by raising the salinity, but it might not help at all.

Do you know for sure what the actual salinity is?

What does the box say for salinity?

I am going to make a video of my cell being taken apart start to finish maybe this weekend. It should help people to understand what happens in a cell.