Husqvarna PT26D Workshop Manual page 43

The LED is located on the connection side of
the sensors. The LED lights when the sensor
is voltage fed and detects the target surface.
IMPORTANT INFORMATION
There is a risk of damage to the sensor if
testing it with a test lamp. The LED pro-
vides the same information, but without
risk of overload.
42
English-
DESIGN AND FUNCTION
LED in sensor
8043-171