Significant Gas Levels Detected
Warning: Immediately bring the vehicle to a safe stop when the buzzer alarm sounds and the lower red 'Significant' LED illuminates. Apply the park brake, turn off the ignition, press the eStop button, and get clear of the vehicle.
Waiting to see if the upper red 'Significant' LED illuminates after one minute could result in severe personal injury or death.
Warning: If outside the vehicle when the alarm buzzer sounds, do not attempt to open or enter the cab to retrieve items, turn off the ignition, or hit the eStop button; doing so could result in severe personal injury or death.
Note: The green 'Systems Normal' light is extinguished when the red 'Significant' LED illuminates. This does not indicate that the system has lost power or is not operating normally.
If gas concentrations increase to the 50 percent LEL for that gas, and maintain or exceed that level for six continuous seconds, the lower red 'Significant' LED illuminates and the buzzer alarm activates and emits a continuous alarm.
If ambient gas levels return to normal, the lower red 'Significant' LED goes out and the green 'Systems Normal' LED illuminates.
If gas concentrations greater than 50 percent of the LEL for that gas persist or increase for more than one minute, the upper red 'Significant' LED illuminates and the buzzer alarm starts beeping.
Once the upper 'Significant' LED comes on and the buzzer starts beeping, they continue to do so until the 'System Reset' button is pressed.
If the 'System Reset' button is pressed before ambient gas levels have dropped, the gas detection system will restart the alarm sequence.