Sprite seems to open valve then fails to deliver water to the system

I have had my Sprite installed for a couple of weeks and all seemed well, but looking at my garden I realized it was not watering. When I turn it on manually I can hear a short buzz and water entering the valve, but there is no flow. I can open the valve manually and water then flows. I have reverted the valve to the old timer and it then opens the valve, so I don't think the problem lies there. 

I have the black wire on the valve connected to the common terminal, which was how it was set up on the old timer. I cannot figure out what the the problem is. 

I am an international user with a non-Netro PSU, but it seems to as specified: 24VAC 850mA Adapter AC-AC 100V-240V to 24VAC Power Supply Adapter UK PLUG

Can anyone help me overcome this problem with what otherwise seems to be an excellent system?

Answer From Netro Inc

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Netro Inc
 Updated at 2019-05-19 03:50:11 UTC

Hi David,


Please use a multi-meter to measure the resistance between the common wire and each zone. The normal reading would be 20-60 Ohms. If the reading is less than 10 Ohms then you might have a shorted circuit in the solenoid and if it is larger than 80 Ohms you might have an open circuit. To test if the controller is working properly, use a multi-meter (AC voltage mode) to test the voltage between the common wire and the zone wire when the zone is active. Normally the voltage should be between 24V and 28V.


Thanks

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