VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
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Testing the Installation
Safety Test
Ensure the following has been completed:
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Place the automatic transmission in “PARK” and apply the park brake. Turn the
ignition “ON” but do not start the engine.
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Check the control box to see if it is illuminated. If there is no display, there is no
power to the control box.
☐
Press the “ON” button on the control box. The green LED should come on and
the compressor clutch will engage, this should be audible.
Place the vehicle in a safe operating position and adequately block
the wheels. Ensure that there are no people around the vehicle prior
to performing the following tests.
Before Starting the Engine Checklist
Ensure the following has been completed:
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Verify that the compressor oil level at the AOST sight glass is correct.
On systems equipped with VMAC’s digital throttle control, the
“PRK BRAKE” LED will remain illuminated at all times, regardless of
park brake position.
Prior to proceeding, ensure the green LED on the control box is still illuminated
from the previous step. If not, ensure the vehicle transmission is in “PARK”, the park
brake is applied, and the vehicle ignition is turned to “ON”. Cycle the compressor
off, then on again to reset the safety parameters.
Release the park brake*.
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*The green light on the control box should flash and the display will flash
“PARK BRAKE”.
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*Apply the park brake again and press the “ON” button. The green light
should come on.
With the brake pedal firmly depressed, shift the vehicle into “REVERSE”*.
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*The “STATUS” and “PRNDL” LED’s on the digital throttle control will turn off.
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*The green LED on the control box will remain illuminated.
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*Shift the vehicle back into “PARK”.
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*Cycle the compressor off, then on again to reset the safety parameters.
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Repeat these steps in all gear selector positions to ensure the “STATUS”
and “PRNDL” LED’s on the digital throttle control will turn off (Note that
on some vehicles, the engine speed will remain elevated, and the “STATUS”
and “PRNDL” LED’s may remain illuminated when the vehicles is placed in
“NEUTRAL”, this is normal
).
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Press the “OFF” button on the control box.
☐
Turn the ignition “OFF”.
The engine must be running to complete the final steps in the safety test. This will
be done after the pre-start checks have been completed.
