MTU 12 V 2000 M40A Operating Instructions Manual page 233

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
pushbutton (3). Observe speed limit and
speed simulated by Engine Monitoring Unit
on display.
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 push‐
button (2) flashes;. Alarm signalling by
horn, flashing light etc. is initiated.
ALARM ACKNOWLEDGE pushbutton
(1) is illuminated brightly.
2. Press ALARM ACKNOWLEDGE pushbut‐
ton (1).
Result: Audible and visual alarm signaling stops.
3. Press ALARM ACKNOWLEDGE pushbut‐
ton (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)
flashes;. Alarm signalling by horn, flash‐
ing light etc. is initiated. ALARM AC‐
KNOWLEDGE pushbutton (1) is illumi‐
nated brightly.
3. Press ALARM ACKNOWLEDGE pushbut‐
ton (1).
Result: Audible and visual alarm signaling stops.
4. Press ALARM ACKNOWLEDGE pushbut‐
ton (1) again.
Result: Power supply to Engine Control Unit is pro‐
vided.
5. On engines with emergency air-shutoff
flaps: Open flaps.
MS150031/05E 2013-01 | Task Description | 233