Intermittent Autopilot error

[Toybuilder]

How old are your cells? Are they fairly new?

At this point, I've contacted Josh Ulfers who is in the industry and is awesome with trouble shooting. He's also a member here and has been extremely helpful with some issues I've had with the 220.

For now I would dump in bleach/chlorine to get your FC up. 1ppm definitely isn't enough especially now that you're seeing algae.

[rcenturion]

the cells are each between 2 and 3 years old

the green algae is gone now and the free chlorine reading today was between 1 and 2 ppm, so it appears to be producing some chlorine at least some of the time. I added a gallon of chlorine last week to help clean up the algae problem.

[Toybuilder]

At this point, I don't know if I'd rely on your SWCG to keep FC up at the level you need. Adding a gallon of 8.25% bleach only raises your FC by about 6ppm. Not knowing your CYA level, it may not last. You may need to add more.

Here's a link to contact AutoPilot direct with your issues, http://autopilot.com/contact, plus there are some quick links that may offer some help. Sorry I'm not able to help you much with your issue.