Operation; Starting, Aux Fuel, Battery Backup - RS Flight Systems SCU Front Panel V2 Installation & Operation Manual

5.

Operation

This chapter describes operational procedures for the SCU Front Panel V2.
5.1

Starting, Aux Fuel, Battery Backup:

•
Start Switch in "OFF" position: both grounds "Aircraft" and "EMS" are shorted to avoid
different potentials during refueling and ground handling.
•
Start Switch in "BATTERY ON" position: The master relay is activated.
•
Start Switch in "ENGINE POWER" position: the SCU is powered. 1 sec later, the SCU activates
the Start Power Relay and supplies the ECU with power. Also, the Backup Battery Switch is
enabled in this position.
•
Lane Switch in "LANE A" position: The ECU LANE A is activated, and the Main Fuel Pump is
supplied with power.
•
Lane Switch in "LANE A+B" position: The ECU LANE A and B are supplied with power, and the
Main Fuel Pump is supplied with power. Hold this position for at least 1 sec. every time you
pass it.
•
Lane Switch in "LANE A+B" position pushed: The starter relay of the engine is activated. The
"ENGINE START" position is spring loaded. After starting the engine, maintain in position
"LANE A+B". The Start Power Relay is automatically switched off by the SCU 3 sec. after the
engine has reached 1500 rpm.
•
Lane Switch in "LANE B" position: The ECU LANE B is supplied with power, and the Auxiliary
Fuel Pump is supplied with power.
•
The Auxiliary Fuel Pump can alternatively be switched on by switching the toggle switch
"AUX FUEL PUMP" to "ON".
•
The Backup Battery, if needed, can be utilized by switching the "BATTERY BACKUP" toggle
switch to "ON". This is only possible in "ENGINE POWER" position of the Engine Switch.
•
Both Lane A and Lane B can independently be switched off by turning either the Start Switch
or the Lane Switch to the "OFF" position.
Regarding the Lane check please refer to the Operators Manual by Rotax.
18.10.2022 | V1.02
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Installation / Operation Manual
SCU Front Panel V2