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
10.
Fuel low pressure FUEL LO PR Text
11.
Flap open FLAP OPEN Text
12.
Low oil level LOW OIL LEVEL Text
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.
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CES 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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CES INDICATING - DESCRIPTION AND OPERATION
______________________________________
1. General_______ (Ref. Fig. 001) The indicating system monitors the APU speed and the Exhaust Gas Temperature (EGT). You can also see on the Multipurpose Control & Display Unit (MCDU) the unservicable LRUs and test results for the APU system.
2. System Description__________________ (Ref. Fig. 001)
A. Power Indicating The power indicating system monitors the APU speed in revolutions per minute (rpm). Two speed sensors transmit a signal to the ECB 59KD. The ECB 59KD gives a speed signal to the Electronic Instrument System (EIS). The EIS shows the APU speed in percent on the APU system page at the lower ECAM display unit.
B. Temperature Indicating The temperature indicating system monitors the APU Exhaust Gas Temperature (EGT). Two rakes, each with two thermocouples, transmit a signal to the ECB 59KD. The ECB 59KD gives a EGT signal to the Electronic Instrument System (EIS). The EIS shows on the APU page at the lower ECAM display unit the APU EGT in DEG. C.
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