Diamond DA 40, Flight Manual

Page: 269 / 300

DA 40 AFM
Airplane
Description
Doc. # 6.01.01-E Rev. 8 01-Dec-2010 Page 7 - 43
Master Switch (ALT/BAT)
The Master switch is divided into a Master switch (ALT) on the left and a Master switch
(BAT) on the right. Both switches together are known as the Master switch (ALT/BAT).
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Consumers
The individual consumers (e.g. radio, electrical fuel pump, position lights, etc.) are
connected to the main bus via automatic circuit breakers.
Designations and abbreviations used to identify the circuit breakers are explained in
Section 1.5 - DEFINITIONS AND ABBREVIATIONS.
Ignition
The basic version of the DA 40 is equipped with the electric start boost system
SlickSTART. This system improves the start characteristics by delivering more spark
energy during the engine start sequence. After engine starting the ignition is controlled
by the conventional retard breaker magneto system.
As an option, the LASAR electronic ignition control unit can be installed instead of the
SlickSTART system. This unit measures manifold pressure and RPM and uses these
parameters to optimize the ignition timing. This provides for smooth engine running and
improved starting behavior. If the electronic ignition control is not in operation, the status
light for the ignition illuminates and the conventional magneto ignition takes over the
ignition control. Also, during operation of the engine on only one magneto, for example
during the magneto check, the ignition is not controlled electronically and the status light
for the ignition should illuminate. For engine restart in flight without the electronic ignition
control being operative an engine speed of more than 500 RPM is necessary. The magneto
ignition is independent of the electrical network, therefore providing safe engine operation
even in the event of a power failure.