TriPac HMI Controller Description and Operation
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TriPac HMI Controller Operation
Press HMI Controller Main Power Key
1. Press the Main Power Key. The green LED indicator will
be illuminated when the HMI Controller is turned on.
Figure 14: HMI Controller Main Power Key
Enable APU System
2. The Engine On/Off Switch (inside the TriPac APU) must
be on for the engine to run. Press the HMI Controller APU
Key to enable the diesel power unit and also enable sleeper
compartment air conditioning, air circulation, truck battery
voltage sensing and engine coolant temperature sensing.
The APU Key LED will be illuminated while the APU is
enabled. When the APU Key is initially pressed, the
TriPac unit engine hourmeter reading will be displayed.
(See next step.)
Figure 15: APU Key
AMA562
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