Digital Throttle Control Operation And Adjustments - Vmac Underhood 40 Installation Manual

Operation and Adjustments
The throttle control is configured at the factory for optimum performance at
maximum cfm. In applications where maximum cfm is not required, or noise is a
concern, the throttle control can be adjusted to reduce the maximum VMAC rpm.
Safety features
The throttle control has built in safety features that will disable the system if an
unsafe condition is detected, or either of the lock out parameters is not met (the
vehicle must be in "PARK" and the park brake must be engaged).
If an unsafe condition is detected, the "STATUS" LED will turn off, and engine speed
will return to idle. Once all unsafe conditions have been removed, the system must
be cycled off, then on again to reset it. Once the system powers up, the "STATUS"
LED will illuminate, and the system will operate normally.
If the vehicle is placed into gear, or the park brake disengaged, the
"STATUS" LED and the "PRNDL" or "PRK BRAKE" LED will turn off and
the throttle control will deactivate. This will reduce engine speed to
base idle.
In order to activate the system again, re-engage the appropriate
lockout and cycle the VMAC "OFF" then "ON" via the control box.
For more information on the digital throttle, including error codes,
see the related article the VMAC Knowledge Base:
https://kb.vmacair.com/help/vmac-digital-throttle-control
44
Digital Throttle Control
Figure 44 — Throttle control
VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com