I might not have the details quite right but its along those lines. Mine works as it should (for now...), and if you put the key into the ignition, before you even turn it, the light flashes without pressing any buttons.
Now and then my fob loses sync with the car, so I have to open with the key and the central locking doesn't work. Pop the key in the ignition and without even turning it, it flashes a couple of times, the locks all go up and all is well again.