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AIR OVHT COND
FANS RESET (Overhead Maintenance Panel)
FAULT Lt – Overheat
- Fan stopped
- Press pb to reset.
23. COMMUNICATIONS
SVC INT
OVRD (Maintenance panel)
AUTO – If ldg gear compressed, ground crew can use service interphone jacks to
communicate with the cockpit.
ON – Comms possible with ldg gear not compressed
- ON light white
MECH
Pressed – COCKPIT CALL lights up Blue on external power panel.
- External horn sounds.
Released – COCKPIT CALL remains lighted
- external horn stops sounding.
Overhead Panel Switches
23-Jan-07 For reference only
FLT REST (A340) / CAB REST (A340) / PURS / FWD / MID / EXIT / AFT
Pressed – Pink light illuminates at area call panel
- CAPTAIN CALL appears at Attendant Indication Panel (AIP) with Green
light.
- High-Low chime sounds through corresponding loudspeaker
ALL
Pressed – All stations respond as above.
- CALL ALL CAPT appears on AIP’s.
EMER
ON – Pink light at all area control panels
- CALL PRIO CAPT message on all AIP’s
- Red light and 3 x Hi-Lo chimes.
- Hi-Lo Chime x 3 through all loudspeakers
- ATT Amber light flashes on Audio Control Panels
ON Lt – Flashes white for emergency call from cockpit to cabin.
CALL Lt – Flashes Amber for emergency call from Cockpit or Cabin
If call from Cabin to Cockpit:
- White ON light & Amber CALL light flash
- Amber ATT lights on ACP’s flash
- 3 long buzzers sound in cockpit
System resets when attendant hangs up.
EVAC
COMMAND
ON – In the cockpit: - EVAV light flashes Red.
- In the cabin: - EVAC lights flash at all AIPS’s
- “EVACUATION ALERT” appears on all AIP’s and a Red light
flashes
- specific evacuation tone sounds.
OFF – The alert is stopped
The EVAC light flashes Red when alert is activated
Overhead Panel Switches
23-Jan-07 For reference only
HORN SHUT OFF
Pressed – silences cockpit horn (generated when EVAC activated from cabin)
CAPT & PURS
CAPT & PURS – Alert may be activated from Cockpit or Cabin
CAPT – Alert may only be activated from Cockpit
- If one of the cabin EVAC pb is pressed, cockpit horn sounds for 3 sec only.
CAPT
RCDR
GND CTL
ON – CVR, DFDR, QAR are energized
- On light Blue
AUTO – System automatically energized
- during first 5 min a/c elec network energized
- on gnd with 1 eng running. (system auto switches from ON to
AUTO at first eng start and in case of an electrical transient)
- in flight
System automatically de-energized 5 min after last eng shutdown.
CVR
TEST
Pressed – If CVR energized, test circuit activated
- result visible on Green indicator (one LED OK)
ERASE
Pressed (for 2 sec) – Erases tape completely if
- a/c on gnd
- parking brake on.
A
U
T
O
Overhead Panel Switches
23-Jan-07 For reference only
24. ELECTRICAL
Selects the battery for voltage indication.
(Min battery voltage 25.5v Normal 26.8)
BAT 1(2)
Controls operation of corresponding Battery Charge Limiter (BCL)
AUTO – Automatically controls connect/disconnect of battery to DC BAT BUS by
open/closing battery contactor.
Batteries connected to DC BAT BUS when:
- bat voltage ↓26.5V. End of charge cycle when bat current ↓4Afor 10sec on gnd
& 30min in flt.
- On gnd (<50kt), when batteries only are supplying a/c.
- In flt DC generation lost (limited to 7 seconds)
Batteries connected to DC ESS BUS when batteries only are supplying:-
- in flight
- on gnd (<50kt) provided bat sel to AUTO.
Note: Batteries are normally disconnected
Auto cutoff logic prevents bat from completely discharging on gnd.
Logic – a/c on gnd
- main power off
- bat <23V for 16 sec or longer
OFF – BCL not operating & DC ESS BUS not connected to bat.
- HOT buses remain supplied
FAULT - Amber with ECAM when charging current abnormal. Bat contactor opens
APU BAT
Controls the operation of APU BCL
AUTO – APU BCL automatically controls closure/opening of line APU contactor.
Battery connected when:-
- charging as per bat 1(2)
- When APU start sequence initiated
OFF / FAULT Lt – As for Bat 1(2)
BAT
1
2
APU
Overhead Panel Switches
23-Jan-07 For reference only
A
U
T
O
AC ESS FEED
Normal – AC ESS BUS supplied by AC BUS 1.1 (1 A330)
- Automatically supplied by AC BUS 2.4 (2 A330) when AC BUS 1.1(1) is
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