On our boat we have a Color Control GX that is mounted at the nav station. And we have a MultiPlus inverter/charger that is under the couch. We used to reach under the couch to turn the inverter on and off. This is a minor hassle, and the switch feels sort of flimsy. So it was exciting when I discovered one day that we could turn the inverter on and off using the CCGX. So now we leave the physical switch On and control it using the CCGX.
That works great, except about once a month it does nothing when we choose On on the CCGX. Troubleshooting the first few times this happened involved rebooting things, updating firmware, unplugging and replugging communications cables, and then finally just letting it sit. And after a while it would eventually turn on.
Now I have discovered an easy workaround. On the CCGX I choose Charger Only (which is a third setting in addition to On and Off) and that immediately takes effect. Then I choose On and that immediately takes effect.
My best guess is that some part of the system thinks it is already on so does not accept the command to actually turn on. But also I think it happens more often if I have a large AC load switched on, such as the electric kettle in the morning.