AUTO: Pressurization system uses the FMGS data to construct an optimized pressure schedule. To exit the AUTO position, pull out and turn the selector.
Other positions: The pressurization schedule does not use the landing elevation from the FMGS, but instead uses the landing elevation selected with this knob (from -2 000 to +14 000 ft) as its reference. The LDG ELEV knob scale is only given as an indication; refer to the ECAM information for accurate adjustment.
MODE SEL pb
AUTO: Automatic mode is operating. One of the two systems controls the outflow valve.
MAN: This legend appears in white, and FAULT does not come on. The flight crew then uses the MAN V/S CTL selector to control the outflow valve.
Note: Switching the MODE SEL pb to MAN, for at least 10 s, then returning it to AUTO will select the other system.
FAULT: Amber light and the ECAM caution only when both automatic systems are faulty.
MAN V/S CTL toggle switch
Switch is springloaded to neutral and controls the outflow valve position through the operation of the MAN motor when the MODE SEL pb is in the MAN position.
UP: The valve moves towards the open position.
DN: The valve moves towards the closed position.
Note: To target a precise cabin vertical speed rate, only short inputs should be applied on the toggle switch.
DITCHING guarded pb
NORMAL: The system functions normally.
ON: The operating system sends a “close” signal to the –
emergency ram air inlet,
avionics ventilation inlet and extract valves,
pack flow control valves.
Note: The outflow valve will not close automatically if it is under manual control.
Note: Caution – If the ditching pb is set to ON, with the low-pressure ground cart connected and all doors closed, a differential pressure will build up.