Danfoss fp720

[i=p/u]

How’s it going people, have a wee problem with danfoss fp720…

I don’t know if timeclock is faulty. I put connections in 3&4 Like the last one but it ain’t right or it’s faulty… any help appreciated This fine Sunday

 

[UNG]

Terminals 1, 2, 3 and 4 are normally the switched outputs

Looking at Danfoss FP720 the standard backplate connections are used


The backplate power connections are not numbered but labelled N and L

 

[i=p/u]

After messing around doing a few tests, I’ve ended up with faulty time clock and the valves seemed to be jamming, which I removed pins and sprayed with wd40. All good then ye say
but now it seems that the upstairs heaters is coming on with hot water

From reading, a check valve could have failed or valve could be leaking internally , back to plumber I thinks. Can’t think of anymore maybe you can