Jandy SWG PLC1400 Troubleshoot

[joshuazzx]

Hi Expert,

I have a Jandy PLC1400 purchased in May 2023(1 year and 11month old). I found it recently stopped producing chlorine as I have it run at 100% overnight for 12 hours and no change in the FC level.

I wanted to confirm if it is really the cell is bad or other things. Since my last one lasted more than 6 years before it threw error 120/121, this is less than 2 years old and there is no error code which confused me.

I did an acid wash, but did not see any effect. The plates looks clean and there is no noticeable corrosion.

One thing to mention is 3 days ago, because the cell is not working, there was significant amount of algae growing and I had to add two gallon of liquid chorine to shock the pool. Now the water is clear and FC dropped to 0.5, but the SWG was not able to raise it.

The PH is 7.5 and Salt level is around 3000ppm.

Any suggestions?

Thanks in advance.

 

[ajw22]

If there are no error codes on the Aquapure panel it sounds like your SWG is working fine and the algae in your pool is consuming all the chlorine generated.

Turn off your SWG by setting the % to 0 and follow the SLAM Process

Once the algae is cleared and your pool has a FC level from liquid chlorine you can turn on your SWG and see if it holds the FC level.

First step is getting an algae free pool. A SWG cannot work with algae in the pool.

What test kit do you have?

Algae Archives

www.troublefreepool.com

 

[joshuazzx]

If there are no error codes on the Aquapure panel it sounds like your SWG is working fine and the algae in your pool is consuming all the chlorine generated.

Turn off your SWG by setting the % to 0 and follow the SLAM Process

Once the algae is cleared and your pool has a FC level from liquid chlorine you can turn on your SWG and see if it holds the FC level.

First step is getting an algae free pool. A SWG cannot work with algae in the pool.

What test kit do you have?

Algae Archives

www.troublefreepool.com

I have the TF-100 test kit refilled in Aug 2024.

Thank you, will perform the SLAM and check.

 

[joshuazzx]

If there are no error codes on the Aquapure panel it sounds like your SWG is working fine and the algae in your pool is consuming all the chlorine generated.

Turn off your SWG by setting the % to 0 and follow the SLAM Process

Once the algae is cleared and your pool has a FC level from liquid chlorine you can turn on your SWG and see if it holds the FC level.

First step is getting an algae free pool. A SWG cannot work with algae in the pool.

What test kit do you have?

Algae Archives

www.troublefreepool.com

I remember before when the SWG is on, I can see tiny little bubbles coming out of the nozzle. Now, in case all generated chlorine gets consumed, should I still see the little bubble that coming out of the nozzle? which I did not see and that makes me concern about the status of the cell.

 

[ajw22]

I remember before when the SWG is on, I can see tiny little bubbles coming out of the nozzle. Now, in case all generated chlorine gets consumed, should I still see the little bubble that coming out of the nozzle? which I did not see and that makes me concern about the status of the cell.

Get your pool algae free and then you can diagnose your SWG.

Bubbles are not a reliable indicator.

 

[joshuazzx]

Hi I am currently on the Jandy iAquaLink 3.0 IQ30-RS with PLC1400 SWG, if I switch to the CircuPool RJ series SWG. Do you know if it is possible to continue using the iAqualink web interface to control the SWG?

Thanks in advance

 

[joshuazzx]

If there are no error codes on the Aquapure panel it sounds like your SWG is working fine and the algae in your pool is consuming all the chlorine generated.

Turn off your SWG by setting the % to 0 and follow the SLAM Process

Once the algae is cleared and your pool has a FC level from liquid chlorine you can turn on your SWG and see if it holds the FC level.

First step is getting an algae free pool. A SWG cannot work with algae in the pool.

What test kit do you have?

Algae Archives

www.troublefreepool.com

I think my pool is ready, I did an OCLT, lost less than 0.5ppm, there is no CC, pool water is clean this morning.


I set the cell running at 100% since 7am in the morning. Upon checking the water 9 hours later, the FC level has dropped 0.5-1 ppm. It seems the salt cell is not producing any Chlorine.



As you can see there is no fault code, how should I troubleshoot?

Thank you very much

 

[PoolGate]

I agree, with no error your SWCG is likely producing chlorine. Do you happen to have an ammonia test kit like for an aquarium? If not, run down to your local aquarium store and pick one up. Test for ammonia. If you have any, that is your problem. Ammonia reacts instantly with chlorine to neutralize it. Also test your CYA levels and report what you get.

 

[joshuazzx]

I agree, with no error your SWCG is likely producing chlorine. Do you happen to have an ammonia test kit like for an aquarium? If not, run down to your local aquarium store and pick one up. Test for ammonia. If you have any, that is your problem. Ammonia reacts instantly with chlorine to neutralize it. Also test your CYA levels and report what you get.

Thanks for the reply.

Here are some update.
1. On Saturday, it was starting producing Chlorine, it increased the FC level from 2.5 to 6 ppm by running about 10 hours. CYA is around 30-35
2. On today(Sunday morning), it stopped producing Chlorine again even with 100% and no error code.

I performed some troubleshooting by checking the voltage on the Power Interface Board.


E - 75 VAC: 79.2 v (good)
F - 65 VAC: 68.8 v (good)
G - 19VAC: 21 v (good)

H - 12 VDC: 11.75 v ( seem below 11.8volt)
H - 5 VDC: 5.64 v (seems above 5.2 v)

J - Cell volt output: 0 v ( No voltage output from with/without connecting the SWG)
K - no voltage (No current output)

I checked the connection to the cell and the DC cable, they are fine. It is really strange there is no voltage output from "J" to the Cell, but there is no error Code? is that possible?

Based on the above diagnostic, I am leaning towards that it is the PIB that is failing. The Salt cell was clean and no erosion, it was producing FC as spec yesterday.

Any other ideas?

Thanks a lot