After 3 minutes of operation, use the signal detector to align the air inlet (remove the compression screws at both ends of the signal detector and put one end into the air inlet outside the vehicle). After alignment, the red poison alarm light of the alarm will flash automatically within 5-10 seconds, and the "poison" alarm information of the driver's task terminal or the commander's task terminal will be displayed on the sfy-1 three prevention integrated controller The indicator lights of "comprehensive alarm", "fan operation", "fan port", "filter port" and "filter ventilation" are on, the fan port is closed, the filter port is closed, the fan is on (observe whether the indicator light is on), the fan is running; take away the signal checker, the poison alarm light is off, and wait for the alarm signal to disappear.<BR>
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