Pool Pilot Digital Nano - low cell volts

Ron James

Member
May 23, 2019
5
Punta Gorda, FL
Hello ... I have the Digital Nano that is 5 years old. The pool chemistry is correct but the display started showing : Warning ! low cell volts ...... I cleaned the cell twice (remove cell, cap the one end with plug, water/acid mix for 20 minutes). When I return it to service it read 14 volts and 5 amps. After about an hour it reads 2 volts and 5 amps. The warning will only show periodically, it is not a steady warning sign. In the past it has always maintained 16 volts and 5 amps. Do I need a new cell ? Or should I try cleaning the cell again ?
 
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Ron James

Member
May 23, 2019
5
Punta Gorda, FL
Well, further to my post ... we had been gone for a couple months and had another individual taking care of our pool. Now I find out the only things he checked (once) was the Cl and the pH level. He never checked the alkaline. I checked it yesterday afternoon and it was way out of wack at 330 ppm. I've started reducing it but I'm now wondering if it could have caused the problem with my cell reading of 2 volts and 5 amps. I did clean it twice but it still continues with the low voltage.
 
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Foonly

Active member
May 24, 2018
44
St Augustine FL
Wiggle the connector where the cell cable plugs into the bottom of the Nano control box. I found that mine was flaky, though I was getting Low Amps not Low Volts. The design of that connection is not very robust.
 

Ron James

Member
May 23, 2019
5
Punta Gorda, FL
The TA itself will not effect the SWCG. It can greatly increase the scaling tendency, but you said you cleaned the cell.
Okay, thanks ... I wasn't sure if maybe the excess alkaline could hinder the cell function. Do you know if there is a test that could be performed on a cell such as this ? Maybe some electrical characteristics that could be measured when it is removed from service ?

I have no experience with Pool Pilot SWCG. Does this http://autopilot.com/wp-content/uploads/2016/10/error-code-digital.pdf describe any of your issues?
Thanks again ... this page is actually better than the original that came with it.
 
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Ron James

Member
May 23, 2019
5
Punta Gorda, FL
Wiggle the connector where the cell cable plugs into the bottom of the Nano control box. I found that mine was flaky, though I was getting Low Amps not Low Volts. The design of that connection is not very robust.
.
I too was wondering about the cable. I totally removed it and tested the contacts end to end for a short circuit or open (or partially open) condition with a digital ohm meter. The cable seems fine.
While I'm talking about it, does anyone why it has 3 contacts on each end and only 2 of them get used ? Maybe the third one gets used in some other application ?
 

Foonly

Active member
May 24, 2018
44
St Augustine FL
The thing to look for is a slight brown discoloration in the plastic. On mine it was on the center conductor. That is a sign of overheating, which can happen if the connection is not solid.
 

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