Pentair IC40 not producing enough chlorine

[dlbrannon]

I need help! My IC40 isn’t producing enough chlorine and I don’t know why. I’ve cleaned the salt cell and the filters in my pump a couple times now in the last couple weeks. I’m running the cell at 100% output for 10 hours a day and below are my current test results. Please help!

25000 gallon pool
FC 1ppm
TC 1ppm
pH 7.7
TA 120
CH 500
CYA 55
Salt 3000

 

[Jimrahbe]

dl,

An IC40 in your pool will make a max of 6.7 ppm per day when at 100% and run for 24 hours. That is about .27 ppm per hour.

At 10 hours you are only making 2.7 ppm of FC.. This time of year your pool is most likely using 3 to 4 ppm per day.

Try this test.. Set the cell's output to 50% and watch the "cell" light.. It should come on for about 2.5 minutes and then it will go out for about 2.5 minutes and it will just keep repeating this cycle. If you pass this test then most likely the cell is working just fine.

You could also have algae, even if you can't see it yet.. Algae will consume your FC faster than the cell can make it.

I suggest you run the cell longer and if that does not help, then I suggest that you run an Overnight Chlorine Loss Test or OCLT.

Overnight Chlorine Loss Test

Thanks,

Jim R.

 

[dlbrannon]

dl,

An IC40 in your pool will make a max of 6.7 ppm per day when at 100% and run for 24 hours. That is about .27 ppm per hour.

At 10 hours you are only making 2.7 ppm of FC.. This time of year your pool is most likely using 3 to 4 ppm per day.

Try this test.. Set the cell's output to 50% and watch the "cell" light.. It should come on for about 2.5 minutes and then it will go out for about 2.5 minutes and it will just keep repeating this cycle. If you pass this test then most likely the cell is working just fine.

You could also have algae, even if you can't see it yet.. Algae will consume your FC faster than the cell can make it.

I suggest you run the cell longer and if that does not help, then I suggest that you run an Overnight Chlorine Loss Test or OCLT.

Overnight Chlorine Loss Test

Thanks,

Jim R.

Hi Jim
Yes if I change the output to 50% the cell light is lit for 2.5 minutes and off for 2.5 minutes.

Is there a way to test if we have Algae if it’s not seen?

 

[mknauss]

Is there a way to test if we have Algae if it’s not seen?

Overnight Chlorine Loss Test

 

[dlbrannon]

So I need to bring up my FC to at least 3ppm before I can perform an OCLT to be able to determine if there’s algae present that’s eating all the chlorine my SWG is producing?

 

[mknauss]

i would suggest getting the FC up to target level for your CYA. Say 5 or 6 ppm, then do the OCLT. Use liquid chlorine to raise the FC.

 

[dlbrannon]

i would suggest getting the FC up to target level for your CYA. Say 5 or 6 ppm, then do the OCLT. Use liquid chlorine to raise the FC.

Ok thank you. I’ll get it up to 5-6 and then do the OCLT and report back my results

 

[proavia]

For the OCLT, be sure your SWG is off or set to 0%.

 

[Kilkennyeddie]

May I suggest testing for Phosphates ? I ran into this problem and that's what it turned out to be.