Troubleshooting & Maintenance 9
Note:
Please carefully pull the connection cable out from the hole, as illustrated below.
③
Remove the two screws at the back of the control unit then remove the metal plate.
④
Install a new control unit, attach it with the metal plate, tighten the screws, and put it back to the crossbar.
5.3 Replacement of an infrared sensor
When the WTMD is failed to count the number of alarm events and people walking through the detector, or when
the WTMD does not activate the alarm as needed, there might be something wrong with the infrared sensors. To
replace the infrared sensor, please follow the steps below.
①
Remove the two screws from the sensor, then gently remove the infrared sensor from the WTMD with a slotted
screwdriver;
②
Slowly turn and pull the connection cable out from the sensor.
Note:
There are two cables for a transmitter, and three cables for a receiver.
