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V-MAC Co-Pilot Operator's Manual
Fan Override Switch (Optional)
With the fan override switch, the operator has the option of overriding the preset
parameters for fan engagement to engage the fan when necessary. The fan may be
engaged while the vehicle is moving or while parked. Enabling the fan override
option, and the parameters for override time limits, are customer programmable
using a personal computer running the VCADS software. For fan override with the
vehicle moving, the time limit may be set between 1 and 25 minutes; with the vehicle
parked, there is no time limit.
The operator may disengage the fan (cancel the override) after 30 seconds by pressing
the override switch a second time. The operator cannot interfere with fan operation
(override) if the fan is engaged due to coolant temperature, inlet air temperature or
Freon pressure. If the fan is manually engaged with the fan override switch and engine
speed exceeds a preset overspeed, vehicle management and control (V-MAC) IV will
cancel the override to disengage the fan.
W2076081
Figure 28 — Fan Override Switch
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