Ventilation Panel

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Usage

BLOWER and EXTRACT

• AUTO:
  • When both switches are on AUTO:
    • On the ground before TO power the system is 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.
• OVRD:
  • When either switch is on OVRD:
    • Closed circuit configuration.
    • Air from the a/c 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 a/c system and then overboard.
    • The extract fan continues to run.
• FAULT It:
  • Amber light and ECAM message
    • in blower switch, when:
      • low blowing pressure
      • 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.

CAB FAN pushbutton

• ON:
  • The two cabin fans are on.
• OFF:
  • The two cabin fans are off.

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