blind issues

so the shutter relays are rated to control 2amp load.
what would happen if load exceeds this?
Would the relay just stop?

My issue is new shutter relays are installed, controlling traditional style curtains not roller blinds. Using a ZEN EDLT with 2 key function, closing will operate for about 2-3 seconds then stop, press again, another 2-3 secs then stop. happens all the way till closed then open works fine!

My thought was that curtains may be too heavy for the motor therefore increased current to operate, and cutting out relay?

I'm thinking of installing a contactor for open and 1 for close to handle increased load to see if this could be the issue

Any ideas??

 

The shutter relay has no inbuilt current detection so if you exceed the ratings it will eventually just fail open circuit or welded closed. If you issue a close command to the relay it will activate the close relay for the programmed fail safe time or until another command is issued. Have you run the diagnostic routine to see what commands are being issued? What happens if you press the close button on the relay directly? Have you measured the current draw while the curtain is closing and opening? Does the curtain motor have an over-current or over temperature cutout?

 

Also check for binding of the runners in the track which could lead to an over current situation.

 

Thanks for the input guys.
I'm leaning towards nicks solution as I have a funny feeling I forgot to remove the old c/o relay group address's off. it makes sense too.

I have no issues with open or close when using the existing c/o relay. I'm back on site next week so I will let u know how it goes.

cheers