Diamond Aircraft DV 20 E 2022, Airplane Maintenance Manual

Page: 467 / 903

AIRCRAFT
DV 20 E AMM Indicating Systems
Doc # 4.02.25
Rev. 2
31-50-00
Page 1
15 Mar 2022
Section 31-50
Warning Systems
1. General
The DV 20 E airplane has the following standard warnings:
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CANOPY warning.
)
VOLTAGE warning.
)
START warning.
)
EMU caution.
)
AWL caution
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2. Description and Operation
Figure 1 shows the location of the warnings. The warnings are in two annunciator units at the top of
the instrument panel. The left unit has the START (red) and the CANOPY (red) warnings. The right
unit has the VOLTAGE (red) and EMU (amber) warnings.
Each warning unit has a test switch. Press the front of the unit to operate the test switch. (The
ELECTRIC MASTER switch must be ON).
The main bus provides power to the VOLTAGE and CANOPY warnings through circuit-breakers. The
VOLTAGE and CANOPY warnings operate when the related system provides a ground for the warning
lamp.
The main bus provides power to the AWL caution. An inline fuse protects the circuit. The AWL
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operates when the alternator regulator of the external alternator provides a ground for the caution
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lamp.
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The starter side of the starter relay supplies power for the START warning. An in-line fuse protects the
circuit.
The START POWER relay or BATTERY BACKUP switch supply power and ground to the EMU caution
lamp.
Refer to the related Chapters for data about the systems. Refer to Chapter 92 for wiring diagrams.