DSC WLS900 - Manual (Page 20)

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9C - Door or Window Sensor
WLS905: Insert a small screwdriver in the slot on the side of the Transmitter. Gently turn the screwdriver
clockwise and pull the module to the left.
WLS907: Insert a small screwdriver into the slot on the side of the Sensor. Push the screwdriver in and lift
off the cover.
Remove the batteries from the module, and install three fresh Eveready Alkaline Energizer AAA batteries.
Be sure to insert the batteries in the proper orientation. Re-assemble the Sensor.
9D - Sounder
Remove the Sounder from its backplate. Pull the bottom of the Sounder slightly away from the wall and push
up. Remove the batteries from the Sounder and install four fresh Eveready Alkaline Energizer AA batteries. Be
sure to insert the batteries in the proper orientation. Replace the Sounder on its mounting plate, making sure it
snaps into place. Be sure that the sounder transformer is properly connected after the batteries are installed
(since the batteries will be automatically powering the sounder whenever AC power is disconnected).
9E - Motion Detector
Remove the Motion Detector from its mounting plate by holding the Sensor by its sides and pushing up.
Remove the batteries from the Sensor and install four fresh Eveready Alkaline Energizer AAA batteries.
Be sure to insert the batteries in the proper orientation. Replace the Sensor on its mounting plate, making
sure it snaps into place.