Issue 3 – July 2014 Page 1 - 3
installation and is equipped with the following operating and display
elements:
1. Rocker Switch "Battery"
The battery must be switched ON in normal operation.
2. The circuit breaker below the Rocker Switch "Battery" disables the
alternator. The alternator can be left ON always.
3. Key Switch "Starter"
This switch controls the starter motor only.
4. Voltmeter
5. Warning lamp "Alternator".
Illuminates when the power output of the alternator is too low or the
circuit breaker “Alternator” (Switch resp.) is switched off. Normally, this
warning lamp always illuminates when the “Engine Master” (“IGN” resp.)
is switched on without revolution and extinguished immediately after
starting the engine.
6. Switch "Engine Master"
The Engine Master switch controls the two redundant FADEC
components, and the back-up alternator excitation battery, with three
independent contacts. It is protected against unintentional switching with
a pull-to-actuate mechanism and a guard. The alternator excitation
battery is used to ensure that the alternator continues to function in any
circumstances even if the main battery fails.
7. Switch "FORCE B"
If the FADEC does not automatically switch from A-FADEC to the B-
FADEC in case of an emergency despite of obvious necessity, this
switch allows to switch manually to the B-FADEC.
8. FADEC Backup Battery (TAE 125-02-99 installation)
The backup battery ensures power supply to A-FADEC only when supply
from main battery and alternator is interrupted. This allows continued
engine operation for limited time only.
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