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NORM – 100%
HI – 120% (abnormally hot and humid conditions)
one bleed fail, then HI limited to 112%
Note: When single pack ops or APU supply – auto HI
COCKPIT (CABIN)
12 O’clock - 24°C The actual temp. is measured by
COLD – 18˚ C sensors in the cockpit, galley &
HOT – 30˚ C lav circuits.
COLD HOT
CAB FANS
On – The 2 cabin fans (recirculation fans) run.
- cabin air blown to avionics comp. And mixer unit.
Off – The 2 cabin fans stop
Overhead Panel Switches
23-Jan-07 For reference only
Note: Should a fan failure occur, ECAM caution is activated.
Overhead Panel Switches
23-Jan-07 For reference only
HOT AIR 1
On – Valve regulates hot air pressure
Off – Valve closes
- Fault circuit is reset
- If HOT AIR 1 Fwd cargo heat is lost
Fault – duct overheat detected (88˚ C)
- Valve, associated trim air valve close automatically
- FAULT Lt goes out automatically when temp <70˚ C, or OFF.
RAM AIR
On – Illuminates white
If DITCHING Pb is in normal pos’n:
- RAM air inlet opens
- If Δp < 1 psi: each outflow valve opens to about 50% when not
under manual control. Emergency ram air directly supplied to mixer
unit.
- If Δp ≥ 1 psi: each outflow valve remains normally controlled. No emergency
ram air flows in.
Off – Ram air inlet closes, outflow valves return to normal position
LDG ELEV
AUTO – System uses FMGS data to construct pressure schedule.
Other Pos’ns – Doesn’t use FMGS data. Uses selected elevation.
MODE SEL
AUTO – One of the 2 systems is controlling the outflow valve.
- 2 outflow valves.
- Each operated by 1 of 3 motors, 1 man 2 auto.
- Transfer between the 2 sys occurs 80s after ldg or if one fails. Can
select stby sys by switching to MAN for > 3s then AUTO.
- Uses Ldg elev and QNH from FMGC, and press alt. from ADIRS. If FMGC data
n/a the uses Capt. Baro Reference from ADIRS, and LDG ELEV selection.
MAN – Use MAN V/S CTL to control system.
FAULT lt – Amber with ECAM when both automatic systems faulty.
V/S CTL
Controls the position of the outflow valves when in MAN mode.
UP – The valve(s) move toward the open position.
Overhead Panel Switches
23-Jan-07 For reference only
AUT
O
DN – The valve(s) move toward the closed position
VALVE SEL
AFT - The aft valve MAN controlled, fwd AUTO.
- Both Manually controlled.
FWD - The fwd valve MAN controlled, aft AUTO.
DITCHING
Normal – The system functions normally.
ON – The following valves close; (Lt White)
- outflow valves. Will not close automatically if under MAN control.
- emergency ram air inlet
- avionics ventilation overboard valve
- cargo compartment isolation valves
- pack flow control valves
- Cabin fans stop
Caution: If the ditching pb is put ON, on ground, with low pressure ground cart connected and all
doors closed, a differential press will build up.
EXTRACT
AUTO – On gnd, Eng 2 & 3 not running (both Eng A330);
- the under floor extract valve is closed
- OVBD valve is open
provided DITCHING is not selected.
- In flt, or on gnd, Eng 2 or 3 running (Eng 1 or 2 A330)
- Underfloor extract valve open
- OVBD extract valve closed
OVRD – underfloor extract valve closes
- OVBD extract valve partially opens
provided DITCHING is not selected.
FAULT Lt – Amber with ECAM when extract low flow detected in avionics bay
- Fault Lt goes out when OVRD sel
CARGO AIR COND
COLD - 5˚ C
Mid Posn - 15˚ C
HOT - 25˚ C
COLD HOT
BOTH
Overhead Panel Switches
23-Jan-07 For reference only
BULK
ISOL VALVES
ON – The inlet and outlet isolation valves open.
-valves close and fan stops if DITCHING sel.
- valves close and fan stops if smoke in cargo compt
OFF – inlet and outlet isolation valves close, fan stops
FAULT Lt – Amber with ECAM when either valve not in selected position.
HOT AIR
ON – Fan heater (fan blows onto electric element) on provided:
- Bulk cargo temp below selected temp and
- Bulk cargo door closed.
OFF – Fan heater operation is stopped. Inlet air not heated.
FAULT - Amber associated with ECAM message in case of:
- fan heater failure
- temp sensor failure
- BULK cargo door not fully closed
- Ventilation system failure
- Duct overheat (above 88˚ C) Fault goes off when temp<70˚ and OFF is sel.
　
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