Blown Intellitouch Transformer

[Big-Pops]

Hi there - I have an older Intellitouch system and the transformer has blown. Verified that it was originally wired correctly and that there's no voltage present on any of the 3 outputs (I'm an electrical engineer).
The part number is 520128 which doesn't seem to exist anymore. Many suppliers sell a part number which looks similar - 521233. Tried to call Pentair but the wait was over 180 minutes.

Anybody know if these are equivalent? Picture attached.

Thanks in advance!

 

[Jimrahbe]

Pop,

Those power transformers don't go bad very often...

Electrical engineer or not, how did you test the outputs?

Let's ask Tom if he knows if the older IntelliTouch units had a different transformer than the newer ones. Calling @ogdento

Thanks,

Jim R.

 

[Big-Pops]

Verified that the correct voltage appeared on the input terminals via a multimeter and then an oscilloscope.
Outputs were tested with and without a load, selecting resistors to keep the current well below the 3mA that the low voltage circuit brakers are rated at. Tested first with a multimeter then an oscilloscope.

Cheers.

 

[ogdento]

I'm thinking you meant you picked resistors for 3A, not 3mA.

Anyway, I tossed an intellicenter xformer earlier this year that had zero output... When I peeled back the secondary I found an inline Littlefuse device that had blown. Unfortunately the transformer itself was still toast but you could see if yours has them.

The newer intellitouch transformers are electrically compatible but they mount differently... I'm pretty sure you can put a new one on your old bracket.

 

[Big-Pops]

Yes, I meant 3A. Wouldn't make much difference, though, as long as it had a load below the max rating.
Anyway - ogdento, thanks for the info! Really appreciate it.

Cheers.

 

[ogdento]

hey big-pops if you're in a bind you've likely got enough extra bits kicking around to mock up a temporary supply... my pentair supply is cobbled together from 3 separate supplies going to the single 6-pos connector... used a variable dc supply (for the 12v section - micro, comm port etc.), an 18vac transformer (for the 24vdc section - relay/relay drivers), and a beefy 24vac sprinkler transformer (for the 24vac section - valves).

 

[Big-Pops]

ogdento - not a bad idea, If I had the parts. Unfortunately, no. The good thing is that despite no power to the controller thanks to the transformer, the pump is still operating on its own programming and pumping away. So it can wait until the new transformer arrives.
Thanks again!

 

[Big-Pops]

A followup - thanks all for the assistance! Got the new transformer in, hacked off the mounting plate that the new transformers have and did the install. Everything's back up and running!

Thank you very much!

 

[niveknow]

Hey @Big-Pops I have the same problem down the street from you in Houston.

Didn't want to crash your thread, so I created a new one below. How did you turn on your pumps w/o the intellitouch alive?

https://www.troublefreepool.com/threads/intellitouch.264142/