Flx3_1 indicates that it's port 1 on the FMM module at AquaBus address 3. If you have the ATK, this means that the FMM is mistakenly detecting the optical sensor on port 1 as a flow sensor. Try pushing the optical sensor cable more firmly into the FMM module. They can look like they're fully inserted, but another push causes it to "click" into place so the FMM module properly detects that it's an optical sensor instead of a flow sensor.The Flx3_1 graph showed up on my fusion. I have no idea what it is, any help? Thank you!
Regardless of how long it's been installed, or what you have plugged in, the FMM is mistakenly detecting the device on port 1 as a flow sensor. Double-check the plug anyway. You can also go into the configuration screen for the FMM module to see what it thinks is plugged in:Been installed for months. I don't have a flow sensor, only a optical sensor and leak sensor connected to the module.