Apex FMM module sending error automatic top off not working

[Deep Elem]

My automatic top off and FMM module are sending an error and therefore my ATO is not working please help

 

[SuncrestReef]

What is the error?

Read my ATK Tutorial to ensure you have it set up correctly, understand how it's designed to work, and go through the troubleshooting steps I listed:

Neptune Apex Programming Tutorials, Part 3: Automatic Top-Off Kit (ATK)

Part 3 of our series on learning how to program your Neptune Apex for automatic top-off in a saltwater aquarium.

www.reef2reef.com

 

[ca1ore]

First thing I always do when a module starts acting up is to replace the usb cable.