(2)
Flight Phase Related Mode The flight phase related mode operates, when the other modes are not set. The ECAM system shows the system page related to the applicable flight phase the aircraft is in. The APU system page is shown when these conditions are applicable:
-
the aircraft is in the flight phase 1 or phase 2,
-
the MASTER SW 14KD is set to the ON position.
The APU system page will stay on unless it is cancelled by another
mode until:
-
the APU speed is more than 95 % for 15 s.
-
the MASTER SW 14KD is set to OFF.
(3)
Advisory Automatic Mode The advisory automatic mode operates when one of the following conditions occurs:
-the APU operates and the EGT is less than 33 DEG. C (60 DEG. F) from the overtemperature schedule,
-a LOW OIL LEVEL is detected,
The related indication flashes for as long as the condition exists.
(4)
Failure Related Automatic Mode The failure related automatic mode, automatically shows the system page, when the operation limit is at a warning level. It also gives a warning message on the upper ECAM display unit (engine/warning page).
F. Indications of Operating Parameters The operating parameters of the APU are shown on the APU system display page of the ECAM. The parameters shown are:
--------------------------------------------------------------------
FUNCTION TYPICAL TEXT DISPLAY TYPE
--------------------------------------------------------------------
1.
Title APU Text
2.
APU available AVAIL Text
3.
Bleed Valve Position open/closed Graphics
4.
Bleed Pressure BLEED 35 psi Digital Readout
5.
Exhaust Gas Temperature 557 DEG. C Analog Display and Digital Readout
6.
APU Speed 100 % Analog Display and Digital Readout
7.
Generator Frequency 400 Hz Digital Readout
8.
Generator Voltage 115 V Digital Readout
9.
Generator Load 26 % Digital Readout
G. Status Display The status display of the APU system is shown on the lower ECAM display unit status page. It tells the flight crew the status of the APU system. The status page is set automatically or manually.
(1)
Automatic Status Display The status page is set automatically immediately after a correction procedure is done. The warning is also cleared on the engine/warning page (upper display unit) of the ECAM.
(2)
Manual Status Display When the STATUS (STS) button on the ECAM control panel 11VU is operated, the status page is shown.
H. Warning and Caution
(1) Warning Messages The warning messages are shown on the ECAM (upper display unit -lower third area). At the same time the related system page is shown on the ECAM (lower display unit). The warning message includes:
-the system failure,
-a correction procedure instruction,
-possible limits to the system.
If there are no system failures, memo messages replace the warning messages. The memo message shows the flight crew which functions and systems are in temporary use.
(2)
Master Warning and Caution
(a)
A MASTER WARN and a MASTER CAUT, annunciator lights (attention getters), are installed on panel 130 VU (right glareshield) and on panel 131 VU (left glareshield). They come on, to give the flight crew a visual indication, that a failure (related to a warning or a caution) has occured.
(b)
An APU fire, will cause the red MASTER WARN annunciator lights to come on (flash), together with a 'repetitive chime' (aural warning). An APU system failure, will cause the amber MASTER CAUT annunciator lights to come on (flash), together with a 'single chime' (aural warning).
(3)
Correction Procedure
(a)
When you operate, one of the two MASTER WARN pushbutton switches (with the MASTER WARN annunciator lights on):
-both the MASTER WARN annunciator lights go off,
-the 'repetitive chime' (aural warning) stops.
(b)
When you operate, one of the two MASTER CAUT pushbutton switches (with the MASTER CAUT annunciator lights on):
-both the MASTER CAUT annunciator lights go off.
(c)
When you operate, one of the two clear (CLR) pushbutton switches on the ECAM control panel 11VU:
-
the warning message on the upper ECAM upper display unit goes off,
-
the APU system status page shows on the lower ECAM display unit.
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