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OPERATION
The EMER EXIT LT switch on the overhead panel controls
the Emergency Lighting System.
The EMER EXIT LT switch has three positions : OFF, ARM
and ON. Each of these positions sends a discrete ground
signal to the two types of power supply units.
OFF
In the OFF position a ground signal prevents the
Emergency Lighting System from being switched on when
the AC and DC busbar voltages are not available.The
EMER EXIT LT OFF annunciator light comes on.
Note: The EXIT SIGNS come on with EMER EXIT LT switch
OFF, when the NO SMOKING switch is in ON position
or in AUTO position with landing gear extended.
ARM
In the ARM position the EMER EXIT LT OFF annunciator
light goes off.
When the 115VAC busbar voltage is not avalaible, the
cabin Emergency Lighting and the EXIT signs come on.
The power is supplied from the 28VDC/6VDC converter
in the corresponding EPSU.
When the 28VDC busbar voltage is not available, the
batteries of all EPSUs and Power Supply Units supply
the entire Emergency Lighting System for at least 12
minutes.
The batteries are no longer charged.
ON
In the ON position the Emergency Lighting System comes
on, as if the LIGHT EMER pushbutton on the Forward
Attendant Panel was pushed.
The cabin emergency lights, the exit signs and the
floor proximity lights come on. The power is supplied
through the 28VDC/6VDC converter in all EPSUs and by
the Power Supply Unit batteries.
If the 28VDC essential busbar voltage falls below 16V,
the EPSU and Power Supply Unit batteries continue to
supply the loads for at least 12 minutes.
The batteries are no longer charged.
TEST
Only the EPSUs have a test circuit which tests the
condition of the battery unit, the logic unit and the
related loads.
This test is first performed from the Programming and
Test Panel, but if the BAT OK or SYS OK annunciator
light does not come on, an isolated test must be
performed with the pushbutton located on each EPSU.
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EFFECTIVITY 33-50-00 Page 4
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 156
ALL
EMERGENCY LIGHTING SYSTEM - DESCRIPTION/OPERATION - ELECTRICAL CIRCUIT
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EFFECTIVITY 33-50-00 Page 5
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 157
ALL
THIS PAGE INTENTIONALLY LEFT BLANK
TMULIGP05 LEVEL 3
EFFECTIVITY 33-50-00 Page 6
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 158
ALL
33 - LIGHTS
33-50-00 EMERGENCY LIGHTS - TEST
CONTENTS:
Battery Capacity Test Using PTP
Emergency Power Supply Unit (EPSU) Test
Emergency Lighting System Test
Maintenance Report Using PTP
Self Examination
TMULIGZ01 LEVEL 3
EFFECTIVITY 33-50-00 Page 1
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 159
ALL
EMERGENCY LIGHTS - TEST
BATTERY CAPACITY TEST USING PTP
Before activating a test, it is necessary to set the
NO SMOKING and the EMERGENCY LIGHTING switches to the
OFF position.
The battery capacity test indicates the battery
capacity condition of the Emergency Power Supply Units
10WL thru 15WL.
The SYSTEM TEST function allows the following units
to be tested on ground only:
- ACTIVE DIRECTOR,
- CIDS BUS,
- DEU A,
- DEU B,
- CAM,
- PROG AND TEST PNL,
- FWD ATTND PNL,
- ADD ATTND PNLS,
- ATTND IND PNLS,
- LOUDSPEAKERS,
- SIGN LAMPS,
- AREA CALL PANELS,
- PAX CALL LAMPS,
- READING WORK LIGHTS,
- EMER LIGHT BATTERY,
- DRAINMASTS.
To prevent unauthorized access it is necessary to enter
a code for the battery test.
The duration of the test will be up to two hours.
During the test, it is possible to use the PTP for
other functions.
When the test is activated the BAT light in the BAT
key comes on. An internal time count is started in the
CIDS DIRECTOR.
If the test is OK, the BAT OK light beside the BAT key
comes on.
If there is a failure message on the PTP and if
annunciator light does not come on, you have to test
each EPSU with their individual test button.
When the BAT TEST RESET has been selected, the BAT OK
light and the BAT key light go off.
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