![]() Time for a cable and big lever to manually move that flapper? Resistance (mechanical transformed to electrical) sensor somewhere? I have heard of a HVAC system controller, is there such a thing and could it not be limiting voltage to the servo?Ĭould there be a problem hidden somewhere else in the circuit that is not taking it to zero voltage when in either closed or open position? What am I missing here? Is the design to actually keep power this motor/servo constantly, just switching between negative and positive based on the recirc switch? All the time pushing up against the mechanics? If so, no wonder they keep breakingĭoes anyone have a schematic of this particular circuit that may indicate limits for this servo? negative or positive for 20 sec then 0 volts) as experienced with test 1 and this multi-meter test.ģ) Still with multi-meter attached, I moved the redirect flapper back and forth until it stopped, no voltage change, so it does not seem like there are any limit switches or position sensor in the duct work. There does not seem to be a timer on the circuit (i.e. Positive with switch in re-circ mode, negative when not (depending on lead placement). looking at the guts I don't see how.ġ) When I run it free from the redirect flapper (foam covered piece in the duct work that it is moving) it does not stop, it will just keep turning until (for too many of us) it hits a broken tooth.Ģ) I put a multi-meter on the plug with wires. One poster stated that it is contained in the unit. So I started to wonder, what is the limit stop on/for this actuator. I have the part, but I am concerned about whether or not I may just end up killing this one as well. Hi Gen Vibe group, I am working on my Recirc servo for the second time.
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