# Behaviour in case of power failure

Navigation: Valve Firmware > Options > Power Down, Power Failure Option > # Behaviour in case of power failure |

Valve position before power failure: | Reaction of valve:
Without Power Failure Option (PFO) ... . . - . . G . - .... / ... . . - . . A . - .... | With Power Failure Option (PFO) ... . . - . . H . - .... / ... . . - . . C . - ....
Closed (isolated) | Valve remains closed. | Valve will close or open depending on Power Failure Option configuration. Default is close. Display indicates F.
Valve open or in any intermediate position | The plate remains at the current position.

| All parameters are stored in a power fail save memory.