(3)
 Indicating

 (a) FAULT Warnings (Ref. Fig. 011) FAULT warnings are generated via discrete signals.
 1_ There is an INOP signal if any of the following conditions
 occurs:
 - an electrical failure (loss of power, connector not
 connected)
 - a failure in a detector
 - a failure in a detection circuit
 - the detection of a single fire detection loop for a time
 greater than 16 sec while the other loop is in normal
 condition.

 2 The FAULT warning signals thus generated are transmitted to
_ the cockpit, at the following locations:
 -MASTER CAUT light
 -Upper ECAM display unit: ENG 1 (2) LOOP A (B) FAULT or ENG 1
 (2) DET FAULT.
 The Single Chime (SC) sounds.
 NOTE : In addition, the failure message in plain language is
____ transmitted continuously via the ARINC 429 bus to the CFDIU.
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 FAULT Circuit - Schematic
 Figure 011
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 (b) FIRE Warnings (Ref. Fig. 012)
 FIRE warnings are generated via discrete signals.
 1_ There is a FIRE warning signal if any of the following conditions occurs:
 - FIRE A and FIRE B
 - FIRE A and FAULT B
 - FAULT A and FIRE B
 - FAULT A and FAULT B in less than 5 seconds.
 2_ The FIRE warning signals thus generated are transmitted to the cockpit, at the following locations:
 - ENG/APU FIRE panel (1WD): ENG/FIRE pushbutton switch
 - ENG panel (115VU): ENG/FIRE/FAULT annunciator
 - MASTER WARN light
 - Upper ECAM display unit: ENG 1 (2) FIRE and fire extinguishing procedure
 - Lower ECAM display unit: engine page.
 The Continuous Repetitive Chime (CRC) sounds.
 8. BITE Test_________ 
R R R R R R R R  A. Operational Test The operational test enables the pilot to monitor and activate the fire protection system. This test is part of the daily check-list and is available each time it is needed. The operational test can be performed on the ground or in flight. 
R R R From the ENG/APU FIRE panel, a TEST pushbutton switch (one per engine) checks the condition of the: 

 FIRE Warning Circuit - Schematic
 Figure 012
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R  - fire detectors (Loops A and B), Fire Detection Unit (FDU), indications, 
R  warnings and associated wirings (loop test) 
R 
R  - percussion cartridge filaments of the fire extinguisher bottles and 
R  associated wiring (squib test). 
R 
R  When you press the TEST pushbutton switch, the fire warning indications 
R  are triggered, the fire detection system is operational. 
R 
R  For the engine 1 (same for the engine 2): 
R 
R  - on the ENG/APU FIRE panel (1WD): 
R  . the ENG 1 FIRE legend comes on, 
R  . the SQUIB and DISCH legends come on, 
R  - on the ENG panel (115VU): 
R  . the FIRE legend comes on, 
R  - on the panels 130VU and 131VU: 
R  . the MASTER WARN lights flash, 
R  - on the upper ECAM display unit: 
R  . the red ENG 1 FIRE indication comes into view, 
R  - on the lower ECAM display unit: 
R  . the ENGINE page comes into view, 
R  - the Continuous Repetitive Chime (CRC) sounds. 
R 
R  If the failure is detected during the TEST sequence, a FAULT message 
R  comes into view in the lower ECAM DU (For example ENG 1 (2) LOOP A(B) 
R  FAULT). 
R 
R  NOTE : The TEST pushbutton switch must be held while you do the test.____

R **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,

 B. Built-In Test Equipment (BITE)
 (1) Description
 The function of the BITE is to:
 -monitor the condition of the FDU and the related inputs,
 -analyze and confirm the faults and,
 -store them in the Non-Volatile Memory (NVM).
 The FDU is a type 2 system. The FDU BITE functions are as follows:
 -acquisition of discrete input signals,
　
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