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AMM
Indicating Systems
Doc # 6.02.01
Rev. 5 31-50-00 Page 7
20 Sep 2007
) ALTERNATOR
Red warning light indicating alternator failure. The alternator warning message is
activated by the voltage regulator.
) LOW VOLTS
Amber caution light indicating low voltage at main bus. The low voltage caution
message is displayed when the voltage falls below 24 volts. It is terminated when the
voltage exceeds 25 volts.
) DOORS
Red warning light indicating the canopy/door is unlocked. Micro-switches connected
in series activate the doors warning message when either the door or canopy is
unlocked.
) IGNITION
This light is only used when the LASAR ignition system is installed.
White status light indicating that the LASAR ignition system is in back-up mode. The
LASAR control unit operates the status light when the LASAR system is in back-up
(manual) mode. The WARNING light, the CAUTION light, and the aural alert will not
be activated. Refer to the equipment manufacturer's manuals for more data on the
LASAR system.
) TRIM FAIL
This light is only used when the autopilot system is installed.
Red warning light indicating a failure of the automatic trim system of the autopilot. The
autopilot control unit activates the trim fail warning message when there is a failure
of the automatic trim system of the autopilot.
) unused lights
The White Wire annunciator panel has two lights for possible future use. These lights
are currently unused.
AIRCRAFT
Indicating Systems DA 40 Series
AMM
Page 8
20 Sep 2007 31-50-00 Doc # 6.02.01
Rev. 5
(4) Functional Check
The functional check is automatically started after switching the battery master switch ON. All
lights are flashed, and the aural alert is muted. By pressing the 'acknowledge' button, the lights
are extinguished, and a short aural alert is sounded. This test verifies functionality of the
microprocessor, the lights, and the aural signal.
You may do additional system tests by holding the 'acknowledge' button for 2 seconds. All lights
will begin flashing, and the aural alert will sound continuously.
(5) Wiring Diagrams
Refer to Chapter 92 for the wiring diagrams for the central warning systems.
AIRCRAFT
DA 40 Series
AMM
Indicating Systems
Doc # 6.02.01
Rev. 5 31-50-00 Page 101
20 Sep 2007
Trouble-Shooting
% 1. General
The table below lists the defects you could have with the Central Warning System. If you have the
trouble detailed in the Trouble column read across to the Possible Cause column. Then do the repair
given in the Repair column.
Trouble Possible Cause Repair
Warning/Caution/Status
indication incorrect.
Bulb or diode in
Warning/Status/Caution lamp
failed.
Sensor defective.
Annunciator unit defective.
High resistance or open
connection in the electrical
wiring from the sensor.
DAI annunciator panel: replace
the bulb.
White Wire annunciator panel:
Replace the annunciator panel.
Replace the sensor.
Replace the annunciator unit.
Do resistance and continuity
tests between the indicator and
the sensor. Repair the
defective connection or wire.
AIRCRAFT
Indicating Systems DA 40 Series
AMM
Page 102
20 Sep 2007 31-50-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM
Indicating Systems
Doc # 6.02.01
Rev. 5 31-50-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
This Section tells you how to replace the main components of the central warning system. Refer to the
equipment manufacturer's manuals for more data on the annunciator panel. Refer to the relevant
Chapter for data on the warning sensors.
Refer to Chapter 92 for the Wiring Diagrams.
2. Remove/Install the Annunciator Panel
A. Remove the Annunciator Panel
Detail Steps/Work Items Key Items/References
(1) Remove the instrument panel cover. Refer to Section 25-10.
(2) Disconnect the electrical cable from the
annunciator panel.
At the in-line connector.
(3) Remove the 4 cross-head screws which attach
the annunciator panel to the instrument panel.
Hold the annunciator panel.
(4) Move the annunciator panel out of the instrument
panel and lift clear of the airplane.
AIRCRAFT
Indicating Systems DA 40 Series
AMM
Page 202
20 Sep 2007 31-50-00 Doc # 6.02.01
Rev. 5
B. Install the Annunciator Panel
Detail Steps/Work Items Key Items/References
(1) Move the annunciator panel into its position in the
instrument panel.
　
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