BCU 480 · Edition 03.16l 54
Parameters
4.7. 9 Behaviour of the air valve in the event of a fault 
lock-out
Parameter 32
This determines whether the air valve can be activated 
in the event of a fault lock-out.
Parameter 32 = 0: The air valve is closed in the event of 
a fault. It cannot be activated externally via terminal 23.
Parameter 32 = 1: The air valve can be activated exter-
nally via input 23 even during a fault, e.g. for cooling.