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(5) APU GEN parameters
Identical to the APU GEN parameters on the ELEC page.
(6) FUEL LO PR
Displayed in amber if APU fuel pressure gets low.
(7) FLAP OPEN
Displayed in green when APU air intake flap is fully open (MASTER SW ON).
(8) APU N
‐ Displays APU speed in green.
‐ Becomes amber when N ≥ 102 %.
‐ Becomes red when N ≥ 107 %.
(9) APU EGT
‐ Displays APU EGT in green.
‐ Becomes amber when EGT ≥ EGT max –33 °C. EGT max :See *
‐ Becomes red when EGT ≥ EGT max (automatic shutdown begins). EGT max :See *
* ECB calculates EGT max and transmits it to the ECAM. It is a function of N during start,
and a function of ambient temperature when the APU is running.
Maximum EGT during start : 1 090 °C.
Maximum EGT with APU running : 675 °C.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
APU
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-49-20 P 13/14
FCOM 19 AUG 10
(10) LOW OIL LEVEL
Advisory : Displayed if the ECB detects a low APU oil level when the aircraft is on the ground,
and the APU is not running.
ECAM APU PAGE
Applicable to:
(1) AVAIL
Displayed in green when APU N is above 99.5 % or 2 s after N is above 95 %.
(2) APU bleed air valve position
Inline - Green : The APU bleed air valve is not closed.
Crossline - Green : The APU bleed air valve is closed.
Crossline - Amber : The APU bleed air valve is closed and the APU bleed is ON.
XX - Amber : The APU bleed air valve status information is not available, or the
APU BLEED pushbutton status is not available.
(3) APU bleed air pressure
This box displays the relative bleed air pressure in green.
It shows an amber XX, when the ADIRS2 is not available or selected OFF.
(4) APU GEN line contactor indication
Displayed in green when the APU GEN line contactor is closed.
(5) APU GEN parameters
Identical to the APU GEN parameters on the ELEC page.
(6) FUEL LO PR
Displayed in amber if APU fuel pressure gets low.
(7) FLAP OPEN
Displayed in green when APU air intake ‐ flap is fully open (MASTER SW ON).
‐ Advisory if the flap is not fully closed 3 min after the MASTER SW has been turned OFF.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
APU
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-49-20 P 14/14
FCOM 19 AUG 10
(8) APU N
‐ Displays APU speed in green.
‐ Becomes amber when N ≥ 102 %.
‐ Becomes red when N ≥ 107 %.
(9) APU EGT
‐ Displays APU EGT in green.
‐ Becomes amber when EGT ≥ EGT max –33 °C. EGT max : See *
‐ Becomes red when EGT ≥ EGT max (automatic shutdown begins). EGT max : See *
* ECB calculates EGT max and transmits it to the ECAM. It is a function of N during start,
and a function of ambient temperature when the APU is running.
Maximum EGT during start : 982 °C.
Maximum EGT with APU running :
‐ 682 °C during at least 5 s.
‐ or, 700 °C to 742 °C depending on the ambient temperature.
(10) LOW OIL LEVEL
Advisory : Displayed if the ECB detects a low APU oil level when the aircraft is on the ground,
and the APU is not running.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
APU
WARNINGS AND CAUTIONS
A318/A319/A320/A321 FLEET DSC-49-30 P 1/2
FCOM 19 AUG 10
WARNINGS AND CAUTIONS
Applicable to:
E/WD : FAILURE TITLE
conditions
AURAL
WARNING
MASTER
LIGHT
SD PAGE
CALLED
LOCAL
WARNING
FLT
PHASE
INHIB
AUTO SHUT DOWN
automatic shut down of APU for a reason other
than a fire.
EMER SHUT DOWN
use of APU shut off pushbutton on external
power panel or APU FIRE pushbutton pushed.
In case of APU fire on ground, the APU FIRE
warning is triggered.
SINGLE CHIME MASTER
CAUT APU
APU
MASTER
SW FAULT lt
3, 4,
5, 7, 8
MEMO DISPLAY
APU AVAIL appears in green when APU N is above 95 %.
WARNINGS AND CAUTIONS
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
APU
WARNINGS AND CAUTIONS
A318/A319/A320/A321 FLEET DSC-49-30 P 2/2
FCOM 19 AUG 10
E/WD : FAILURE TITLE
conditions
AURAL
WARNING
MASTER
LIGHT
SD PAGE
CALLED
LOCAL
WARNING
FLT
PHASE
INHIB
AUTO SHUT DOWN
automatic shut down of APU for a reason other
than a fire.
EMER SHUT DOWN
use of APU shut off pushbutton on external
　
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