Pro-C® No AC Message

Pro-C - "NO AC" on Display

The "NO AC" display is a diagnostic message telling you that the controller has stopped receiving AC power. The controller is running on the power supplied by the backup battery.

Check the power source by plugging a lamp or radio into the wall outlet to verify there is power at the outlet. If your controller is not plugged into a wall outlet, the power source is hardwired.

If you do not have power to the outlet, check all wall switches, timers, or power strips that may be connected to the outlet. Have an electrician check your GFI, circuit breaker, and electrical outlet if you do not have power to the outlet.

To verify that you have power to the outlet, disconnect the backup battery from the controller. If the display goes blank after removing the battery, the transformer could be damaged and may need to be replaced. If you a have a mutli meter you could also try testing for 24VAC on the two AC terminals inside the controllers wiring compartment.

Note: Controllers that are hardwired to the power source will need to be tested by a qualified electrician.

[dondag]

Thank you. I can’t believe a break was tripped

[DonBMW]

Had same “No AC” message. Confirmed I had power at the outlet and also did a hard reset. Nothing! Used my voltmeter and there was no AC at the screws. Out of the bag the power adapter was bad. Used my old adapter w new panel and everything worked perfectly!

[josephjacobconcepcion]

Is there anyway to connect this system to my cellphone? Or I have to buy a different system. thank You!

[hyojinkyoma]

But do you guys warranty a faulty transformer? Ie, bad power supply

[andyhutch]

My system quit functioning and I checked the Pro-C and it displayed the “No AC” message. We replaced the transformer. I checked the transformer voltage and it was within the 24-28 volt range. The Pro-C still displayed the “No AC” message. We reset the Pro-C and still was receiving the “No AC” message. What next?