Originally Posted by
DBMandrake
Are you sure the small sliding latch was properly in the locked position ? If it is in the open position then "Valve position" (menu option 10) will always report 0% open and the actuator motor will never move, because it believes it is not fitted to a radiator.
In this condition nothing untoward will be reported on the display - everything will appear normal apart from the lack of radiator control. I suspect your latches were not locked or maybe not clicked quite far enough across so that it was physically locking it from being pulled off but not recognising that it was locked to activate the actuator motor.