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air inlet or outlet valve position is displayed amber
in case of a SKIN VALVE FAULT.
SKIN VALVE FAULT warning is triggered if:
- Skin air outlet valve fully open in phase 3 or
- Skin air outlet valve fully open in flight or
- Skin air inlet valve not fully closed in flight.
TMUVEN501-T03 LEVEL 3
EFFECTIVITY 21-26-00 Page 6
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
EFFECTIVITY Page 214
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AVIONICS VENTILATION - SYSTEM WARNINGS - SKIN VALVE FAULT
TMUVEN501-P03 LEVEL 3
EFFECTIVITY 21-26-00 Page 7
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
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AVIONICS VENTILATION - SYSTEM WARNINGS
AVIONICS SYSTEM FAULT
Aural warning sounds, MASTER CAUT comes on. VENT word
is amber in case of avionics system fault.
AVNCS SYS FAULT warning is triggered in case of AEVC
failure.
TMUVEN501-T04 LEVEL 3
EFFECTIVITY 21-26-00 Page 8
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
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AVIONICS VENTILATION - SYSTEM WARNINGS - AVIONICS SYSTEM FAULT
TMUVEN501-P04 LEVEL 3
EFFECTIVITY 21-26-00 Page 9
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
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AVIONICS VENTILATION - SYSTEM WARNINGS
AVIONICS SMOKE
Aural warning sounds, MASTER CAUT, GEN 1 SMOKE (on the
EMER ELEC PWR panel), BLOWER and EXTRACT FAULT lights
come on in case of avionics smoke detection.
VENT, INLET and EXTRACT words are displayed amber on
the ECAM page.
Note that if smoke detection is confirmed, both BLOWER
and EXTRACT pushbuttons must be set to OVRD position.
TMUVEN501-T05 LEVEL 3
EFFECTIVITY 21-26-00 Page 10
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
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AVIONICS VENTILATION - SYSTEM WARNINGS - AVIONICS SMOKE
TMUVEN501-P05 LEVEL 3
EFFECTIVITY 21-26-00 Page 11
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MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUVEN501 LEVEL 3
EFFECTIVITY 21-26-00 Page 12
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MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
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21 - AIR CONDITIONING
21-26-00 AVIONICS VENTILATION -
SYSTEM DESCRIPTION/OPERATION
CONTENTS:
General
Open Circuit Configuration
Closed Circuit Configuration
Partially Open Circuit Configuration
Self Examination
TMUVEN603 LEVEL 3
EFFECTIVITY 21-26-00 Page 1
Nov 30/99
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MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
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AVIONICS VENTILATION - SYSTEM DESCRIPTION/OPERATION
GENERAL
The system is automatically controlled by the Avionics
Equipment Ventilation Computer and no crew action is
required.
The Avionics Equipment Ventilation Computer (AEVC)
will change the system configuration depending on
whether the aircraft is on ground or in flight and on
aircraft skin temperature.
Note that the BLOWER and EXTRACT pushbuttons must be
in AUTO position.
TMUVEN603-T01 LEVEL 3
EFFECTIVITY 21-26-00 Page 2
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
UF94200
EFFECTIVITY Page 222
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AVIONICS VENTILATION - SYSTEM DESCRIPTION/OPERATION - GENERAL
TMUVEN603-P01 LEVEL 3
EFFECTIVITY 21-26-00 Page 3
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 21 AIR CONDITIONING
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AVIONICS VENTILATION - SYSTEM DESCRIPTION/OPERATION
OPEN CIRCUIT CONFIGURATION
In OPEN CIRCUIT CONFIGURATION, ambient air, drawn
through the skin air inlet valve by the blower fan,
is blown into the system. The air, after cooling
avionics equipment, is drawn by the extract fan
directly overboard.
The OPEN CIRCUIT CONFIGURATION allows avionics
equipment to be cooled with ambient air under certain
　
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