CircuPool SJ-40 Issues - Can't "see" it working anymore?

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
I purchased a circupool sj-40 last year. All last year, I could easily see that the unit was working by looking at the salt cell. It would bubble or put off a slight haze and I knew it was working.

This year, nothing. I cant seem to keep FC in my pool and the water passing through the powered up SJ40 is clear and stays clear. My salt level is at 4000ppm and I've tested this numerous times.

All the self diagnosis and lights are green on the unit. Thoughts?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
10,745
Northern NJ
The cell cycles on and off depending on the % you have set. If I recall correctly the SJ cells have a 2 hour cycle. So if you have 50% set it will run for 1 hour out of two, off for one hour, then reverse polarity and run one hour, etc.

What % output do you have set? How long do you run your pump?

Good chance you are walking by looking at the cell during the idle times.

How about posting a set of test results. What is your water temp?

Have you done an Overnight Chlorine Loss Test with the SWG off and on?
 

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
I've set it to 100% and Full Blast and turn it off and on and havent seen it put off chlorine at all this year. Last year, I could always see that it was working after I put power to all the equipment.

I'll do a full water test and post.

My salt is 4000 ppm, water temp is 84F. I run the pump 24/7 at one speed or another. The SWCG runs about 18 hours a day at 50 or 75% depending on bio load and season.
 

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
Hi Guys. Easter got me side tracked this afternoon so I didnt have time to do water testing until now. Here's the results:

FC: 2.5
CC: 0
CH: 200
TA: 100-120ish
Ph: 7.6
CYA: ~60 ish (its cloudy and I cant see very well)
NaCl: 4000
Water Temp: 84F

Lights on the SJ-40 are all green to 100%. Polarity light is green at position 1. Power and Caution light are both unlit.

Edit: After testing, I added 38oz of 31.45% Muriatic Acid to bring Ph into spec.
 
Last edited:

needsajet

TFP Expert
LifeTime Supporter
Jan 4, 2016
4,697
Sydney, NSW, Australia
You could try disconnecting the cell lead under the control module and reconnecting it, just to rule out a loose connection.

There is also a reset (fuse) button on the bottom where the connectors go in. That might also be worth a try.
 

Ejkeebler

Active member
Mar 15, 2016
43
Fort Mill/SC
I have the same device and I was having the same problem. Then I noticed my power light was flashing. This can mean a few things, one is the flow is too slow. I increased the rpm to try and make sure i was getting the required 30 gpm, which I felt I was well above. What I discovered, was I had to power cycle the device before it would recheck the flow and start producing chlorine. So if you power on your SWG BEFORE your pump gets to the required speed, your out of luck unless you cut the power. I had mine on a timer and it was just coming on right before the pump, now i have it come on right after, and I was able to lower my speed considerably. Maybe its the same issue or similar.
 

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
Hi All - I've fiddled with this thing and fiddled with it. I started out this summer low on CYA so now I've got that up to where it's supposed to be and I'm still not generating chlorine with the CircuPool. I've emailed their support several times and they keep telling me to look at the lights and check my chemistry. I'm confident my swg isnt working and feel like I'm being blown off by the mfg. Oh well, I guess next time I will buy a Pentair or other known brand -- and not take chances with this other stuff.
 

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
Nope. They didnt do anything and never responded to this thread either. For now, I'm using Pool shock online from atwoods for liquid chlorine. I wouldnt suggest purchasing one of CircuPOol's units as their after sale service was pretty bad. They just kept blaming my chemistry and saying "it's working". It's not.
 

Cmasty

Well-known member
May 15, 2016
57
Tulsa, ok
Yeah its unfortunate. My wife asked me earlier why we have to add the chlorine still. I really dont have time to mess with chasing down a manufacturer and proving my case. Ive been dealing with the TFP method for a few years and feel that I have a good feel for balancing my water. I started two separate cases with CP and they basically said to check my chemistry (I did and reported it to them both time) and the second time said check my phosphates. Really? When I get around to it, I'll buy another nacl chlorinator and install. For now, its good ol bleach or chlorine.