-
the change-over relay (6DL) does not operate

 -
the fault relay (7DL) does not operate

 -there is an electrical power failure to the wing ice protection system.
 The electrical circuit gives the ECS computer and the SDAC/ECAM this data:
 -
the system selected (SDAC/ECAM only)

 -
the system ON

 -
the left and/or the right valve closed

 -
the left and/or the right air outlet pressure low

 -
the left and/or the right air outlet pressure high.

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 Warning Logic Figure 009
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 When the FAULT light of the P/BSW (3DL) comes on: - the ECAM system automatically starts - there is a single chime - the master caution light comes on - the ECAM (lower DU) shows warning messages.
 C. System Faults and Warnings
 There is a 10 second delay before the warning messages show on the ECAM system. This prevents warnings that are not necessary because of low pressure when the system is set to ON.
 When the system is set to ON, the FAULT light comes on until the pressure is above the low limit. 
R R  (1) System set to OFF and the control valve is not closed (aircraft on the ground) 
RR  After the aircraft has landed and if the control valve does not close within 35 seconds, the system gives: - an amber warning - a single chime - a warning on the ECAM to tell the flight crew to turn off the system to prevent overheat damage (Ref. 31-51-30-00). 
R  (2) System set to OFF and the control valve is not closed (in flight) 
RR  If the control valve does not close (with the system set to OFF) in flight, the system gives: - an amber warning - a single chime - an ECAM warning (Ref. 31-51-30-00).
 The warning is inhibited during the flight phases from 1st engine take-off power to 800 ft thru touch-down to 80 kts. 
R  (3) System set to the ON position and the control valve is closed. 
RR  If one of the two or the two control valve(s) does/do not open (when the system is set to ON) within 10 seconds, the system gives: - an amber warning - a single chime - data shown on the ECAM related to the position of the engine bleed valve(s) and the cross-bleed valve (Ref. 31-51-30-00).

 The FAULT (amber) light on the P/BSW (3DL) will come on.
 (4) System set to the ON position and the pressure is not in limits.
 When the system is set to the ON position and the pressure is too
 high, the system gives:
 -the applicable ECAM warning(s).
 The FAULT (amber) light on the P/BSW will not come on.
 When the system is set to the ON position and the pressure is too low (for a period in excess of 10 seconds), the system gives:
 -an amber warning
 -a single chime
 -the applicable ECAM warning(s) related to the position of the engine bleed valve and the cross-bleed valve (Ref. 31-51-30-00).
 The FAULT (amber) light on the P/BSW (3DL) will come on.
 8. BITE Test
_________
 (Ref. Fig. 010)

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 A. Automatic Test and Test Monitoring
 When the aircraft is on the ground, the automatic test facility is started when the control switch (3DL) is selected ON and is stopped after 30 seconds by the time delay relay. SDAC/ECAM monitors the test function and in the event of the test running for 35 seconds or more, the ECAM signals a SHUT DOWN PENUMATIC SYSTEM warning message, to prevent overheat damage to the slats.
 At the start of the test sequence, the amber warning light on the glareshield will be illuminated until the pressure in the system has risen above the low pressure setting.
 If the change-over relay (6DL) fails to operate, the amber warning light will remain ON throughout the test sequence. The light will only extinguish at the end of the test time, or when the control switch (3DL) is selected off.
 If the fault relay (7DL) fails to operate, the amber warning light will be illuminated when power is on the aircraft 5V warning-light power-system.

R  MCDU System Displays Figure 010 (SHEET 1)
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R  MCDU System Displays Figure 010 (SHEET 2)
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R  MCDU System Displays Figure 010 (SHEET 3)
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 In the event of a power failure to the electrical control system, the amber fault light will be illuminated when power is available to the aircraft 5V warning-light system.
　
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