Document: SLSA-MIP-5-4-0-US
Date of Issue: 05/2016
Revision: -
11-3
NOTE
Until the idle speed is reached, the EMS requires an external 12V supply from the onboard
system of the aircraft (battery).
11.2.1
Switches, circuit breakers
The switches serve for switching ON/OFF individual electrical circuits. There are two kinds
of switches:
switches
–circuit breakers
switching ON/OFF and protecting the electrical circuit from overloading together
switches -
the classical for avionics circuit (
no circuit breakers)
the rocker for flaps
the buttons for trims
Every switch is marked with a placard with designation of the circuit (see Tab. 11-1). The
switches are located on the instrument panel and on the middle channel. The buttons for
ailerons and elevator trim are on the grip of control stick. Wiring diagrams are shown in
16.CHAPTER
Switches (Rotax 912 iS)
Designation
Description
MASTER
Main switch.
ENGINE START
Engine start button. The Red Start Button on the instrument panel activates the starter
motor
START POW.
Start Power switch. By pressing the Start Power Switch, the EMS system of the engine is
powered externally by the onboard battery for a short time during start-up. The start power
switch makes a connection only during the startup procedure between the ECU, ignition
system and the EMS lamps with the external onboard battery.
LANE A
Ignition 1 switch. The two independent LANE select switches A and B connect the ECU for
the relevant LANE to the EMS power supply. If only one LANE is turned ON, the engine is
powered by one ignition circuit, depending on which ignition circuit was chosen.
LANE B
Ignition 2 switch
BACK BAT.
Backup battery switch. If necessary (e.g. in case of supply failure by the internal generator)
the EMS system can by powered by the onboard battery by activating the Battery Backup
Switch.
BACKUP E-1
BACKUP EFIS
Backup battery switch for EFIS 1.
Backup battery switch for EFIS 1, EFIS 2 (if dual screens are installed)
FUEL MAIN
Main fuel pump. Only use one pump when starting the engine. Using of both fuel pumps
can lead to a bad start behaviour.
FUEL AUX.
Auxiliary fuel pump
LA-FAIL, LB-FAIL
Warning lamps to indicate LANE A or LANE B failure.They should illuminate and extniguish
after around 3 secs after activating the Start Power Switch. If one of the two warning lamps
start to flash, fail to illuminate, or still illuminates after a few seconds, then this indicates an
anomaly.
EMS WARNING
Red warning lamp to indicate that some of the engine parameters reached preset limit value
(red radial). The pilot should check which one on the engine instruments and take
appropriate action.
EMS CAUTION
Yellow warning lamp to in
dicate that some of the engine parameters reached preset “yellow
caution range”. The pilot should check which one on the engine instruments and take
appropriate action.
PANEL POWER
Switch on radio, transponder, flaps, trims, GPS, Sockets,
Trutrak EFIS GP, Trutrak EDM, Trutrak AH
NAV LITES
Nav lites switch
STROBE LITES
Strobe lites switch
LAND LITES
Land lites switch
Tab. 11-1
Switches, buttons and warning lamps
Summary of Contents for S-LSA
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