I have a strange one that I haven't seen others with the same problem.
I have 3 leviton ZW4SF fan speed controllers on 3 different ceiling fans (AC).
I have a rule that when my A/C cool runs, I set the speeds to each fan and turn them on, and when my A/C cool turns off, I turn the fans off.
I have tried the system driver (only 3 speeds though) and the user driver (ernie's driver with 4 speeds).
Initially, I thought it was because I was turning all the fans on at the same time in my rule, so I separated them and put in a 1 second delay between each fan command, thinking that the flood of commands was locking up the fan speed controller's processor.
What happens is randomly, one/two/all of the controllers with lock up and not turn on. Even pushing the "up" paddle at the switch does nothing.
The green power light is on, but does not change and the fan does not run.
I have to use the air isolation switch (power down, power back up) to reset the controller and then it will function.... for a while, but will eventually lock up again.
Does anyone have a clue as to what is going on or have any ideas as to what to try?
I like the 4 speeds, but NO speeds kinda defeats the purpose!