Operating Instructions
29
Engine On/Off Switch
The Engine On/Off Switch is located inside the TriPac APU
housing on the lower right side of the frame. This switch must
be in the On position for the TriPac engine to operate.
Engine On/Off Switch
The APU Engine On/Off Switch functions as a service switch.
It allows maintenance personnel to disable the APU engine.
This assures the engine will not crank even if the HMI On/Off
button is pressed on.
When the Engine On/Off switch is placed in the Off position:
•
If the TriPac system is OFF and the TriPac HMI On/Off
button is pressed, no shutdown alarm will generate.The
engine will not start.
•
If the TriPac system is ON but the APU engine is not
running, no shutdown alarm will generate. The engine will
not start.
•
If the TriPac engine is running, the engine will stop and a
shutdown alarm (code 35) will generate in the [ENG]
group. The engine will not restart.
WARNING: The unit may start automatically without
warning if the Engine On/Off Switch is in the On
position.
WARNING: Immediately stand clear when the
preheat buzzer sounds. This indicates that the engine
is preheating and will start shortly. If the engine is
hot, preheat time will only be a few seconds.
Operating Instructions
29
Engine On/Off Switch
The Engine On/Off Switch is located inside the TriPac APU
housing on the lower right side of the frame. This switch must
be in the On position for the TriPac engine to operate.
Engine On/Off Switch
The APU Engine On/Off Switch functions as a service switch.
It allows maintenance personnel to disable the APU engine.
This assures the engine will not crank even if the HMI On/Off
button is pressed on.
When the Engine On/Off switch is placed in the Off position:
•
If the TriPac system is OFF and the TriPac HMI On/Off
button is pressed, no shutdown alarm will generate.The
engine will not start.
•
If the TriPac system is ON but the APU engine is not
running, no shutdown alarm will generate. The engine will
not start.
•
If the TriPac engine is running, the engine will stop and a
shutdown alarm (code 35) will generate in the [ENG]
group. The engine will not restart.
WARNING: The unit may start automatically without
warning if the Engine On/Off Switch is in the On
position.
WARNING: Immediately stand clear when the
preheat buzzer sounds. This indicates that the engine
is preheating and will start shortly. If the engine is
hot, preheat time will only be a few seconds.