-
the In Operation Test (IOT),
-
the Self Test (SET).
The ECB transmits the data to the Centralized Fault Display-System (CFDS) (Ref. 31-30-00), if selected on the Multipurpose Control and Display Units (MCDUs) which are the interface for selection and indication of the data.
D. APU Life Data You can also select the APU life data on the MCDUs for indication. The APU life data are:
-
the APU Serial Number,
-
the APU Operating Hours,
-
the APU Cycles.
ECAM Display Units Figure 001
R EFF : 106-106, 108-149, 211-299, 301-399, Page 249-70-00 Config-3 Aug 01/05
CES
The APU life data are stored in the ECB and the DMU (Ref. 31-00-00). The APU serial number is hardwired in the encoder, which is installed on the APU.
3. Operation/Control and Indication________________________________ (Ref. Fig. 001)
A. System Display During usual operation, the APU system page is shown on the lower ECAM display unit in one of these modes:
-
the manual mode,
-
the flight phase related mode,
-
the advisory automatic mode,
-
the failure related automatic mode.
(1)
Manual Mode In the manual mode, operation of the APU button (on the ECAM control panel 11VU on the pedestal) shows the APU system page on the lower ECAM display unit.
(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 60 DEG. C (140 DEG. F) from the overtemperature schedule,
-a LOW OIL LEVEL is detected,
-the air intake flap is not fully closed within 3 minutes of the
MASTER SW selection to the OFF position. 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 ECAM (upper display unit) engine/warning page.
B. 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
C. Status Display The status display of the APU system is shown on the ECAM (lower 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
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