Viper Model 550HF Automobile Alarm User Manual


 
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© 1997 Directed Electronics, Inc.
Safety Features
This system has several important safety features to ensure proper operation
of the motor and prevent accidental damage to the engine or its components.
Over and Under Rev Protection
The system monitors the engine speed and will shut the engine off if the
RPMs rise above or fall below programmed levels. This prevents damage to
the motor due to fuel delivery system failures or other problems which may
cause the engine to race.
NOTE: The system uses a wire connected to the vehicle to sense engine speed. This wire must be
connected for over and under rev protection to work.
Shut Down Inputs
The system uses several inputs to shut down the remote start operation of the
motor or prevent it if they are active. The two most important are hood and
brake inputs. The hood input will prevent the motor from starting as well as
shut it down any time the hood is opened. The brake pedal will shut down the
motor at any time during remote start operation, as well as preventing the
remote from activating while it is being pressed.
Starter Anti-Grind Circuitry
Whenever the vehicle is remote started, advanced anti-grind circuitry within
the unit will prevent the starter from being engaged, even if the key is turned
to the start position. This prevents accidental damage to the starter motor
should the key be turned to the start position during remote start operation.
NOTE: Anti-grind circuitry only works when the remote start system is operating the motor and the
Failsafe
®
starter kill relay is installed.