JBJ ATO Fail-Safe Timer Adjustment

markbeta · 09/09/2015, 11:13 PM

I'd like to know if anyone knows the details of adjusting the fail-safe timer on a JBJ ATO controller?

I know that the time duration that the pump can be switched ON can be adjusted by opening up the controller and turning a dial mounted on the circuit board. I know that factory default setting is 3 minutes and 45 seconds, and the maximum setting is 14 minutes.

What is the minimum setting? What duration of time corresponds to one click of the dial?

My controller is not accessible enough for me to easily find the answers to my questions on my own. Thanks for any help.

laga77 · 09/10/2015, 06:44 AM

IIRC, when I had to adjust mine, it was set to the minimum from the factory.

09/09/2015, 11:13 PM	#1
markbeta Registered Member Join Date: Jun 2015 Location: Albuquerque, NM Posts: 15	JBJ ATO Fail-Safe Timer Adjustment I'd like to know if anyone knows the details of adjusting the fail-safe timer on a JBJ ATO controller? I know that the time duration that the pump can be switched ON can be adjusted by opening up the controller and turning a dial mounted on the circuit board. I know that factory default setting is 3 minutes and 45 seconds, and the maximum setting is 14 minutes. What is the minimum setting? What duration of time corresponds to one click of the dial? My controller is not accessible enough for me to easily find the answers to my questions on my own. Thanks for any help.

09/10/2015, 06:44 AM	#2
laga77 Registered Member Join Date: Jan 2014 Location: Alsip, IL Posts: 1,133	IIRC, when I had to adjust mine, it was set to the minimum from the factory. __________________ Four legs good. Two legs better. Current Tank Info: 50G SPS/NPS Reef, 120G Mixed Reef, 120G FOWRL, 29G Seahorse tank, 20G Observation tank,