2
Choosing a Suitable Location
The ALC-PRM-VFC is designed to be ceiling mounted and must satisfy the following criteria:
Avoid positioning the unit where direct sunlight may enter the sensor element.
Installation
Switch Level On/Off
The device can be made dependant on the ambient light level using the Lux On Level and Lux Off Level parameters.
Sensor functionality
What if the load does not turn ON?
Check that the live supply to the circuit is good.
Increase the Lux on level to switch on at a higher brightness .
What if the load does not turn OFF?
Increase the lux off level to switch off at a lower brightness.
Load cycles on and off
Increase the difference between the lux on level and the lux off level.
Increase the time setting.
Angle the sensor away from the light that it is controlling.
Fault finding
Wiring Diagram - Mains load
Wiring Diagram - Volt Free Contact
