Hi all
Seem to have an intermittent fault on my heating side.
system is Gloworm Spacesaver vented, 2 x 2port Sunvic SM5203 valves, Danfoss FP715 programmer.
to run thru the problem, press Ch button on programmer and the CH on wire is live, the valve acutator starts moving ( I can see this as I have the head off, valve open manually). when it contacts the switch the live feed goes dead (back to the programmer) but the red light on the programmer is still on. If I turn the programmer off and on again the live is still dead.
Then hours later I can try the sequence again and this time it may be live and the acutator makes contact and the pump and boiler will start.
One thing the spindle on the valve seems a bit stiff, could this have knackered the valve + turning the live off?
hot water and room stat ok.
Any suggestions I would be grateful.
Seem to have an intermittent fault on my heating side.
system is Gloworm Spacesaver vented, 2 x 2port Sunvic SM5203 valves, Danfoss FP715 programmer.
to run thru the problem, press Ch button on programmer and the CH on wire is live, the valve acutator starts moving ( I can see this as I have the head off, valve open manually). when it contacts the switch the live feed goes dead (back to the programmer) but the red light on the programmer is still on. If I turn the programmer off and on again the live is still dead.
Then hours later I can try the sequence again and this time it may be live and the acutator makes contact and the pump and boiler will start.
One thing the spindle on the valve seems a bit stiff, could this have knackered the valve + turning the live off?
hot water and room stat ok.
Any suggestions I would be grateful.