TriPac HMI Controller Description and Operation
33
Optional Standby Operation
The optional TriPac HMI Controller Standby Mode allows the
system to be controlled by an external source which is typically
the truck’s ignition system. This is used to disable the TriPac
system when the truck’s engine is running. The display will
show “Sby” when the controller is in this mode. During
Standby mode the controller is temporarily disabled and none
of the TriPac systems will operate. Voltage sensing and the
optional coolant temperature sensing functions are also
disabled while in this mode.
Figure 21: Standby Operation
Options Used With Standby Operation
Standby Truck Integration
When the truck’s ignition switch is in the Off or Accessory
position, the TriPac APU will operate normally if the APU
Engine On/Off switch and the TriPac HMI Controller Main
Power Key are On. If the truck’s ignition switch is in the On
position, the TriPac HMI Controller will be forced to Standby
Mode.
Truck Integration Selector
Switch
When the dash mounted Truck Integration
Selector Switch is in the Normal position,
the TriPac APU will operate the same as
with Standby Truck Integration above.
However, if the dash mounted Selector
Switch is in the Standby position, the APU
will be forced to Standby mode.
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