7
Tab_Fault diagnosis
LED indicator/fault pattern /
LED indicator/fault pattern
Cause /
Cause
Measures /
Measures
Green LED does not light up or
flickers /
Green LED does not light up or
flickers
Sensor is still ready for operation,
but the operating conditions are
not ideal (operating reserve factor
between 0.9 and 1.1) /
Sensor is still ready for operation,
but the operating conditions are
not ideal (operating reserve factor
between 0.9 and 1.1)
Check the operating conditions:
Fully align the beam of light (light
spot) with the reflector / Clean the
optical surfaces (sensor and
reflector) / Readjust the sensiti‐
vity (potentiometer) / If the poten‐
tiometer is set to the max. sen‐
sing range: Reduce the distance
between the sensor and the
reflector, and check the reflector
type against Graphic E / Reflector
is not suitable for the application
in question (we recommend only
using SICK reflectors) / Damping
of the object is < 20% / Check
sensing range and adjust if neces‐
sary, see Graphic E / Distance
between the sensor and the
reflector is too long /
Check the operating conditions:
Fully align the beam of light (light
spot) with the reflector / Clean
the optical surfaces (sensor and
reflector) / Readjust the sensiti‐
vity (potentiometer) / If the poten‐
tiometer is set to the max. sen‐
sing range: Reduce the distance
between the sensor and the
reflector, and check the reflector
type against Graphic E / Reflector
is not suitable for the application
in question (we recommend only
using SICK reflectors) / Damping
of the object is < 20% / Check
sensing range and adjust if
necessary, see Graphic E / Dis‐
tance between the sensor and the
reflector is too long
Green LED does not light up /
Green LED does not light up
No voltage or voltage below the
limit values /
No voltage or voltage below the
limit values
Check the power supply, check all
electrical connections (cables and
plug connections) /
Check the power supply, check all
electrical connections (cables and
plug connections)
Green LED does not light up /
Green LED does not light up
Voltage interruptions /
Voltage interruptions
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
Green LED does not light up /
Green LED does not light up
Sensor is faulty /
Sensor is faulty
If the power supply is OK, replace
the sensor /
If the power supply is OK, replace
the sensor
Signal interruptions when object is
detected /
Signal interruptions when object is
detected
Depolarizing property of the
object surface (e.g., tape), reflec‐
tion /
Depolarizing property of the
object surface (e.g., tape), reflec‐
tion
Reduce sensitivity or change the
position of the sensor /
Reduce sensitivity or change the
position of the sensor
Tab_Fault diagnosis
4
8017526
| SICK
