Cabin altitude is more than the warning threshold.

Cabin delta pressure is more than 10.1 psid.

One of the two Ventilated Sensors (Cabin and Flight Compartment) has failed while in automatic mode.

An excessive air temperature has been sensed in the cabin or cockpit air distribution ducts.

Automatic pressurization modes have failed or no data is received from IAS controllers.

Cabin altitude is greater than the caution threshold.

Cabin altitude limitation function has failed on IAS Controller #1 or #2.

DITCHING PBA on the PRESSURIZATION control panel is pushed and the pressurization system is in manual mode.

Temperature in one of the two equipment racks is high.

TCV has failed or the two elements in the CTDS and PTDS have failed.

An overheat has been sensed by the CTDS or PTDS.

A HARSOV has failed or one of the DTS is out of range or send no data.

One of the two elements of the CDTS, PTDS, or PTS has failed.

A high altitude take-off or landing has been initiated and the pressurization system is in the automatic mode.

A fault has been sensed in the avionics equipment rack cooling system.

The manual mode does not operate (on the ground only).

Ram Air regulating valve has failed.

The position of the Ram Air Valve does not agree with the RAM AIR selection made on the AIR COND/BLEED control panel.

MAN PBA on the AIR COND/BLEED control panel is pushed and the PBA light comes on.

AIR SOURCE switch on the AIR COND/BLEED control panel is in the OFF position.

DITCHING PBA on the PRESSURIZATION control panel is pushed and the pressurization system is in automatic mode.

EMER DEPRESS PBA on the PRESSURIZATION control panel is pushed.

MANUAL PBA on the PRESSURIZATION control panel is pushed and the system operates in manual mode.

AIR SOURCE switch on the AIR COND/BLEED control panel is in the PACK ONLY position.

RAM AIR PBA on the AIR COND/BLEED control panel is pushed and the ram air valve is open.

AIR SOURCE switch on the AIR COND/BLEED control panel is in the TRIM AIR ONLY position.