Ventilation Panel
Usage
BLOWER and EXTRACT
- AUTO:
- When both switches are on AUTO:
- On the ground before TO power in open circuit configuration or in closed configuration when the skin temperature is below the ground threshold.
- On the ground after TO power, and in flight, the ventilation system is in closed circuit configuration.
- When both switches are on AUTO:
- OVRD:
- When either pushbutton switch is on OVRD:
- Closed circuit configuration.
- Air from the air conditioning system is added to ventilation air.
- The blower fan stops if the BLOWER pushbutton switch is in the OVRD position.
- When both pushbutton switches are on OVRD:
- Air flows from the air conditioning system and then overboard.
- The extract fan continues to run.
- When either pushbutton switch is on OVRD:
- FAULT It:
- Amber light and ECAM message
- in blower switch, when:
- low blowing pressure is
- duct overheats
- power supply to the computer fails
- smoke warning is activated
- in the extract switch, when
- extract pressure is low
- computer power supply fails
- smoke warning is activated.
- in blower switch, when:
- Amber light and ECAM message
CAB FAN pushbutton
- ON: The two cabin fans are on.
- OFF: The two cabin fans are off.
Last update: August 23, 2021