Yes, but it is possible only to open all relays. A “central Off” function is available on the membrane keypad for this purpose. This function is activated with a long push (> 5 seconds) of the “S” button until all zone LEDs light up. The central Off command can then be triggered by pressing any of the buttons I–IV.
Information about this and many more valuable tips can be found in the manual for Combi Actuators at:
Link to manual