System Description; System Limitations - Rotax 915 iSc 3 A Installation Manual

For a detailed System description refer to the latest issue of the Operators Manual.

SYSTEM LIMITATIONS

Operating limits Refer to latest issue of the Operators Manual.
Valid installation The ECU may be installed either in the engine compartment or in the cockpit. To prevent
positions the ingress of liquids (moisture), the ECU must be mounted in a way that the plugs are fac-
ing downward.
The two Ambient Air Pressure and Temperature Sensors (AAPTS) are all-in-one sensors
for engine ambient temperature and engine ambient pressure. In cowled engine installa-
tions they have to be mounted in the engine compartment in a ram air free area and close
to the air inlet. The sensors must measure the correct air inlet temperature and the air
pressure right before the air filter. The AAPTS sensors must not be mounted in the air in-
take system between the air filter and turbocharger inlet. The AAPTS must be mounted
isolated from vibrations (e.g. caused by the engine).
The casing of the ECU must not be connected to the airframe ground. The rubber vibra-
tion damping (insulation material) must not be removed. If the rubber dampers were re-
moved, the engine ground and the aircraft ground would be short-circuited.
Component tem- Limitation see Chapter 00-00-00 Approval of electric and electronic components.
peratures
limitation
Connections When connecting the wiring harness with the ECU take into account the labeling on the
wiring harness and the ECU. Although the connectors are mechanically coded (i.e. wiring
harness connector A1 can only be connected to ECU A1 socket), excessive force or incor-
rect positioning can result in bent pins and the ECU would then need to be replaced.
Unplug the ECU connector from the wiring harness only if absolutely necessary. Connec-
tor plugs (ECU) are suitable for up to 20 plug-in operations. The number of plugging oper-
ations must be entered into the logbook. If this limit has been exceeded the ECU needs to
be replaced.
Wiring harness In no case the wiring harness must be shortened or modified. Do not bend, kink, pinch or
otherwise improperly stress the wiring harness. The bending radius of the wiring harness
must not be less than 50 mm (1.97 in). To avoid excessive tension on the ECU connec-
tors, a strain relief must be installed in a distance of ~ 100 mm (3.94 in) from the ECU.
Do not bend, kink, pinch or otherwise improperly stress the wiring harness. Use
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December 01 2017
BRP-Rotax
INSTALLATION MANUAL

SYSTEM DESCRIPTION

proper routing, clamping and strain relief on wiring harnesses.
ATTENTION
Effectivity: 915 i A Series
Edition 0/Rev. 0