-the Smoke Detection Control Unit (SDCU) starts an automatic test of the smoke detectors.
-smoke conditions are simulated.
-fire extinguisher bottle pressure drop condition is simulated.
(2)
In the normal condition, the indications are as follows:
-
the AFT SMOKE warning light on the CARGO SMOKE panel 22VU comes on.
-
the MASTER WARNING lights on the glareshield panel 130VU come on.
-
the Continuous Repetitive Chime (CRC) ist heard.
-
the CARGO SMOKE message on the ECAM upper display unit comes on.
-
the DISCH light on the CARGO SMOKE panel 22VU comes on.
(3)
When you release the CARGO SMOKE/TEST pushbutton switch 13WH:
-
the DISCH indication light goes off with a time delay of approx. 2 seconds.
-
the AFT SMOKE warning light goes off after approx. 10 seconds.
-
the ECAM message goes off.
-
the test stops after approx. 15 seconds.
NOTE : When the test is started, the cargo compartment ventilation
____ system isolation valves close and the extraction fan stops. When the test stopped, the isolation valves open and the extraction fan starts.
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(4) The test information is stored in the Centralized Fault Display System (CFDS).
B. SDCU Power-up Test
(1)
Conditions of Power-up Test Initialization
(a)
Time that the computer must be de-energized:
-200 ms.
(b)
A/C configuration:
-whatever the A/C configuration is on ground.
(2)
Progress of Power-up Test
(a)
Time:
-10 sec
(b)
Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be ignored):
-none
(3)
Results of Power-up Test
(a)
Test passed:
-none
(b)
Test failed:
-MASTER CAUT lights come on with single chime
-
ECAM warning: SMOKE LAV+CRG DET FAULT
-
ECAM maintenance page: SDCU white indication
R **ON A/C 004-049, 051-099, 101-105, 151-199, 201-299,
5. Test
____
A. System Test
(1) When you press the (PTT) pushbutton switch for more than 2 s a test of the smoke detectors is initiated. The SDCU tests the smoke detectors automatically. The indications are:
-the FWD SMOKE and AFT SMOKE warning lights come on, twice for approx. 2 s, with a delay of approx. 5 s. in a normal condition.
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 26-16-00Page 29 1201-299, 1May 01/05 1 1 1CES 1 The system also passes the test, when the lamps come on once in the case of:
-
a wiring failure on the detector's bus system,
-
a failure of one SDCU channel,
-the respective SMOKE warning light does not come on, if both smoke
detectors, installed in one cavity, do not operate. The test stops approx. 10 s after the PTT pushbutton switch is released. After the PTT pushbutton is pressed, the isolation valves of the cargo-compartment ventilation-system close and the extraction fan stops (Ref. 21-28-00). When the test stops, the isolation valves open and the extraction fan starts. The information is stored in the Centralized Fault Display System (CFDS).
B. SDCU Power-up Test
(1)
Conditions of Power-up Test Initialization
(a)
Time that the computer must be de-energized:
-200 ms.
(b)
A/C configuration:
-whatever the A/C configuration is on ground.
(2)
Progress of Power-up Test
(a)
Time:
-10 sec
(b)
Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be ignored):
-none
(3)
Results of Power-up Test
(a)
Test passed:
-none
(b) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM FIRE PROTECTION 防火1(73)
