Aquapure PLC 1400 - Code 120-121

Jump to latest Follow Reply
A

AMH1

Active member
Apr 1, 2021
40
Texas
Hello,
I cleaned my saltwater (3 years old) cell at the beginning of summer and it has been working fine till last week. I keep getting error 120-121 after a few minutes of operating the pool pump. Reading thru the forum, 120-121 error indicates a low voltage to the salt cell and I know the salt cell looked clean when I washed and soaked it diluted Muratic acid for 20-30 min and the balck 3 prong Wire to the cell is in good shape. I cleaned the 3 terminals with emory cloth to clean inside each of the 3 holes in the black wire to make sure it was not corroded and took off the small round gray salt sensor from the bottom of salt cell and cleaned it's terminals and put it back.

With the wires connected and pump running and error 120-121 , I measure the voltage by placing the probes between the middle and the left terminals AND then middle and right terminals on the salt cell . I keep getting around 42-43 DC volt. My Salt water PPM on the remote and on the jandy display is 3200-3300PPM

Does that sound about right? I am not sure what to look for or how to check the volatge inside the jandy control box, appreciate any info!
Thanks!
 
Last edited:
Thanks for the reply.....I took the panel cover off and checked the end of the salt cell cable going into the System board and the Blue & Red connection looked good. However, I noticed there was a 12 circuit wire connector coming from the Transformer going into the Circuit board and it had couple of it's wires burned. Could that be causing the 120-121 Error?
 

Attachments

  • IMG_6521.jpg
    IMG_6521.jpg
    76.1 KB · Views: 10
  • IMG_6523.jpg
    IMG_6523.jpg
    122.7 KB · Views: 8
  • IMG_6518.jpg
    IMG_6518.jpg
    94.2 KB · Views: 8
Well.......The plug on the board is a little black on 2 holes and looks dark but I can still see the 2 pins on the motherboard , so I maybe able to get the small tiny pins cleaned up on the motherboard somehow.
But I definately need to chgange the plug on the transformer end.
Can I just buy a 12 pin connector? The problem is how do you match the pattern, so it would plug into the motherboard connector. The plastic connectors seems to all have different shapes...Thanks again for your advice, as I am new owner and have not done this before!
 
Here is another case of the plug being burned.

Jandy 1400 Power Transformer Burned...And?

Hello everyone. I moved into a house with a pool about 4 years ago. If I had known how much trouble it would be I probably would have bought a truck load of concrete with the house :) . However, this forum has been awesome, saved me a ton of money and trouble. Anyway, onto the latest issue...
www.troublefreepool.com www.troublefreepool.com
 

Enjoying this content?

Support TFP with a donation.

Give Support

0039012120 | Digi-Key Electronics

Order today, ships today. 0039012120 – 12 Rectangular Connectors - Housings Receptacle Natural 0.165" (4.20mm) from Molex. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
www.digikey.com www.digikey.com




 
Thanks so Very much JamesW......For all your help. It will probably be cheaper to 1st, replace the plug and hopefully the connector that sits on the system board is good and I can try to stick a pin or sharp pick and try to clean it and see if it works.

If not , then I probably have to replace the darn sysetm board.
 
  • Like
Reactions: JamesW
You must log in or register to reply here.
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Top Bottom
Back
Jump to latest Follow Reply