Altistart48

We'd like to help but I can't understand what you are saying. Slow down and type more clearly, don't use abbreviations.

Also, please register so we can refer to you as something other than "Anonymous Poster #1"

I think you are saying that it starts OK, but when you give it a Stop command it is braking?

(sty) stands for selection of the type of stop and (d) is deceleration of pump

First off,you are absolutely sure that is a -d- and not a -b- correct? Because if it is a -b-, that means Braking! Just for grins, try setting it to something else, then BACK to -d- just to make sure it is recognizing the command. Also make sure you are hitting the Enter key after each parameter change, otherwise it does not accept the change.

Assuming it is definitely a -d-, then what are the next two parameters set at, your dEC (Decel time) settings and EdC (End Decel Level) settings? If you have the time too short for instance, your check valve may be slamming shut, flow stops, load goes away and the starter turns itself off, which happens very quickly and you might be interpreting that as "braking". Likewise if you have the End Decel Level set too high, it stops decelerating and the check valve slams, same net result.

Getting those settings right is a bit of an art, especially if you have a very low head pressure. Let me know if any of that helps, if not there are other more uncommon things to look at.

All that said I am NOT a fan of that soft starter, I don't think the Decel function works well in my opinion, and I have commissioned a LOT of soft starters on pump systems over the years.

if you are in the US, call square D support line. (800 number - Google is your friend) the technical support people have been an excellent resource for me over the years.

Make sure you have concise information, and application specific details (environmental, how many cycles per hour, etc...) they cannot help you if you cannot provide details.

Amazing A company that actually supports it's products...

Buy Square D / Schneider!!! keep these people employed!!!

Funny, I would have said exactly the opposite. I once wasted an entire month's worth of cell phone minutes on the phone with them trying to set up a simple PID loop on an ATV71 drive. Nobody in their tech support group could explain to me what the French translations in the manual meant and how they related to industry standard terms for PID loops such as Setpoint, Process Variable, Error and Response, let alone more complex concepts such as Offset and Gain. Gave up and got another brand working in 10 minutes, so I know it wasn't me...