Question about RTO Hunter Psr-22 Pump Start Relay

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I have installed a Hunter psr22 pump start relay and connected it to a Hunter src irrigation controller and when I cycle the irrigation controller to manual all stations it will not start the pump. There is pump power in to and out of the relay. The pump will start when relay operated manually. There are only two wires from the relay that have been landed on the controller terminals mv and c.

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So the mv and c are supplying power to the transformer/relay and out of it, but the pump won't start until the relay is forced.
I'm thinking the relay contacts are oxidized, and need to be cleaned. When they have oxidation, current goes up, and voltage might appear ok. If any start capacitors are in the circuit, they can be faulty, breaking down under a load, while reading ok. I haven't heard of any caps in these systems, but just in case.
The following blog may help you- it's about different controller situations:
http://forums2.gardenweb.com/forums/load/water/msg121639307045.html?9
Hunter's website has some things to check concerning the controller:
http://www.hunterindustries.com/resources/library/product_technical.html
Looks like it could be microprocessor lockup. It's quite a process, but here's what they say is the fix:
http://www.hunterindustries.com/resources/library/Technical/200611_hdln_micropro.html
Good luck, hope this helps, and thanks for using FixYa.

Posted on Sep 14, 2010

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Posted on Jan 02, 2017

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