Uponor zone control board fuse blows and relay is cycling every second

Billiambob

I think that I have two problems on my Uponor three zone control board (A3031003).

Problem 1: The unmounted actuator for zone one does not rotate even after being powered for more than five minutes. The board’s 4 amp fuse blows instantly when the actuator is rotated manually (the end switch is disconnected).

Problem 2: A relay on the control board is short cycling every second when a new Taco zone actuator end switch is connected. It does this when the actuator is in the open or closed position.

any ideas? Thanks

109A_5

" The unmounted actuator for zone one " is probably defective and should be replaced.

The " new Taco zone actuator " may not be compatible with this control module, it may draw too much current.

What happens if the " new Taco zone actuator " is left disconnected and you just jumper R1 to R2 of that zone ?

Billiambob

Thank you for your response.

Problem 1: I already tested both actuators using a temporary plug in 24VAC transformer and both operated normally. The motors rotated and end switches connected. I will repeat this again and measure the current draws. I will also get the draws with the actuators mounted in place.

problem 2: I will try the jumpers you suggested, thanks.

109A_5

" Problem 1: The unmounted actuator for zone one does not rotate even after being powered for more than five minutes. The board’s 4 amp fuse blows instantly when the actuator is rotated manually (the end switch is disconnected). "

The actual zone valve may be jammed so the actuator can't move it. I don't think it should blow a fuse when manually rotated.