Ato problems

brians_224 · 08/23/2016, 07:33 PM

Thanks for your time!

Im having an issue with my ato. The top off function isnt working - no water being pumped and the top off lights aren't lighting up. I know the unit has power applied to it, b/c i can manually trigger the high level alarm; it lights up and i hear the audible alarm as expected.

Hope you can help!

rvitko · 08/24/2016, 09:17 AM

I assume it is older? The symptoms would only match what I have seen on the older board made before late 2011 and would match to a bad pump or a burned out transistor. If you disconnect the pump and it then lights up, likely a bad pump, otherwise a transistor has burned out on the board.

08/23/2016, 07:33 PM	#1
brians_224 Registered Member Join Date: Jan 2004 Location: Brookfield, WI Posts: 1,172	Ato problems Thanks for your time! Im having an issue with my ato. The top off function isnt working - no water being pumped and the top off lights aren't lighting up. I know the unit has power applied to it, b/c i can manually trigger the high level alarm; it lights up and i hear the audible alarm as expected. Hope you can help!

08/24/2016, 09:17 AM	#2
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	I assume it is older? The symptoms would only match what I have seen on the older board made before late 2011 and would match to a bad pump or a burned out transistor. If you disconnect the pump and it then lights up, likely a bad pump, otherwise a transistor has burned out on the board. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish