Overspeed test with the engine
at standstill
Note: Overspeed test with the engine at standstill
can only be carried out if the engine is
equipped with Engine Monitoring Unit.
1. Press OVERSPEED TEST illuminated push-
button (3). Observe speed limit and speed
simulated by Engine Monitoring Unit on dis-
play.
Result: • Engine Control Unit is de-energized by
the safety system.
• Engine governing is completely deacti-
vated.
• On engines with emergency air-shutoff
flaps: Flaps close.
• EMERGENCY STOP illuminated pushbut-
ton (2) flashes;. Alarm signalling by horn,
flashing light etc. is initiated. ALARM AC-
KNOWLEDGE pushbutton (1) is illuminat-
ed brightly.
2. Press ALARM ACKNOWLEDGE pushbutton
(1).
Result: Audible and visual alarm signaling stops.
3. Press ALARM ACKNOWLEDGE pushbutton
(1) again.
Result: Power supply to Engine Control Unit is pro-
vided.
4. On engines with emergency air-shutoff
flaps: Open flaps.
Emergency stop simulation with
the engine at standstill
1. Open cap of EMERGENCY STOP pushbut-
ton (2).
2. Press EMERGENCY STOP pushbutton (2).
Result: • Engine Control Unit is deenergized by
the safety system.
• Engine governing is completely deacti-
vated.
• On engines with emergency air-shutoff
flaps: Flaps close.
• EMERGENCY STOP pushbutton (2) flash-
es;. Alarm signalling by horn, flashing
light etc. is initiated. ALARM ACKNOWL-
EDGE pushbutton (1) is illuminated
brightly.
3. Press ALARM ACKNOWLEDGE pushbutton
(1).
Result: Audible and visual alarm signaling stops.
4. Press ALARM ACKNOWLEDGE pushbutton
(1) again.
Result: Power supply to Engine Control Unit is pro-
vided.
5. On engines with emergency air-shutoff
flaps: Open flaps.
226 | Task Description | MW15406/17E 2014-05
TIM-ID: 0000008872 - 004
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