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August 15, 2023 at 6:33 am #82044::
Unit has been working properly for 4 years.
Suddenly – ‘No AC’I’ve tested everything, but it still shows ‘No AC’
– checked the circuit breaker
– checked the GFI outlet
– Opened the unit and checked the incoming ac
– Opened the unit and checked the convert 26v output to board
All power tests show no issues– Tried ‘reset’ button – does nothing
– changed batteryWhen I disconnect the display panel ribbon cable, the display is exactly the same – all blank except for ‘No AC’
Can anyone offer some help?
November 8, 2023 at 12:42 pm #82179::I have the same problem with the 6 zone. The power transformer is putting out 29V AC to the power board. The power board has a fuse. It looks like a yellow capacitor but it is a fuse. You may want to check that. Mine was not blown. I have purchased a replacement powerboard on eBay for $19 and am waiting for delivery. I am guessing the board is bad since I cannot find any data on troubleshooting the power board. I will let you know if it fixes the problem… if it doesn’t I am anticipating having to purchase a completely now unit.
November 9, 2023 at 10:08 am #82185November 10, 2023 at 12:54 pm #82193::I just tried out the replacement Power board and the controller now works. In doing some comparisons I think the bad board has a bad Diode labeled D2. it is next to the L1. It is a B160 surface mount diode. I have attached a detail PDF of the diode. If I can find one I will try and replace the one on the board…
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You must be logged in to view attached files.December 11, 2023 at 10:59 am #82207April 25, 2024 at 9:23 am #82413April 25, 2024 at 11:01 am #82415::I just had the same problem with my 6 station sprinkler controller #57946. “NO AC”. I called Orbit customer support at 800-488-6156 and made a warrantee claim. This was after I tried disconnecting the power for 30 seconds, unplug the ribbon connecter, press reset, replace the battery… They asked me how long I’ve had the unit and I told them I’m not sure but it’s “more than a year”. And Orbit stood behind their product and provided a warrantee discount code where I was able to purchase a replacement online at orbit online.com at no charge. Outstanding product support! I suspect there may be a hidden warrantee with this “NO AC” issue. As some have said, there seems to be a circuit weakness in the 2 diodes that eventually fail after several years. I’m a happy customer!
June 8, 2024 at 5:53 pm #82492June 20, 2024 at 3:54 pm #82507July 6, 2024 at 9:47 am #82527::I have a 6 zone unit, same problem – controller just stopped working, started displaying AC Only. About 3 years old so when I spoke with tech support and went through their troublehshooting was offered the 30% discount. I’m similarly going to consider Rachio (discount through my water company) – while the tech was very polite, I also don’t want to replace these every 3 years, and seeing that others had the same issue, I suspect its a defect.
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