Have orbit timer mod 57974 , 4 station with an a and b zone control. three of five units work fine. the other two wont activate the solenoids. i tested the solenoids and checked the fuses on the boxes as well as the outlets providing power to the units, and the back up AA batteries. the units both program and say they are working when activated in manual mode, yet they do not activate the solenoid ???
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First check the solenoids by performing a continuity test on all of them. For all the solenoids that test good, power each one with 24 volts to make sure that the plunger moves. Then go to the timer and initiate an ON cycle for, say, zone one. Go to the zone 1 connector on timer and check for presence of 24 volts ac. If not present try zone 2 for output. If nada then there is something wrong with the electronics of the timer.
What model number of timer? I have to see exactly which timer you have to answer question. What wire goes where? Are you using 120Volts? What is output voltage of timer? What voltage is solenoid? 24Volt or 120Volt? Copy following links for Orbit manuals: http://www.orbitonline.com/support/guides/Manualsearch3.cfm?Brand=02&Type=Timers
Example below: -Power to operate timer: The example timer has power cord that plugs into outlet. Other timers have low voltage transformer that plugs into outlet.
Connecting solenoids. Each station or solenoid has two wires: The common wires are connected together so that common connects to each solenoid, and the second wire connects to terminals 1 2 3 4 as shown.
I have done this in a couple ways. With a digital timer you can select a zone on manual and turn only that zone on. with a mechanical timer, you can set the dial to that zone and increas the duration. You can "hot wire" the zone by moving the zone wire to connect to the low voltage wire input to the zone. You can take a transformer out to the ground box and with an extention cord "hot wire " the zone at the ground box.
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