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Fault Diagnosis - SICK SureSense - HTB18L Betriebsanleitung

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Fault diagnosis

7
Table Fault diagnosis
8017855 | SICK
Subject to change without notice
dark switching
2
1
Timer stages can be set from 0 to 2 seconds.
Light/dark switch: The sensor is in light switching mode when optional light/dark poten‐
tiometer is rotated to the "L" position. The sensor is in dark switching mode when
optional light/dark potentiometer is rotated to the "D" position. The green power supply
LED will flash once when the mode is changed.
Table indicates which measures are to be taken if the sensor stops working.
LED indicator/fault pattern /
LED indicator/fault pattern
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Yellow LED flashes; if Health is
present then take note of the
corresponding output signal; if
Alarm is present then take note
of the corresponding output
signal /
Yellow LED flashes; if Health is
present then take note of the
corresponding output signal; if
Alarm is present then take note
of the corresponding output
signal
light switching
1
2
Cause /
Cause
No voltage or voltage below
the limit values /
No voltage or voltage below
the limit values
Voltage interruptions /
Voltage interruptions
Sensor is faulty /
Sensor is faulty
Sensor is still ready for opera‐
tion, but the operating condi‐
tions are not ideal/addition‐
ally with health output: power
supply interrupted /
Sensor is still ready for opera‐
tion, but the operating condi‐
tions are not ideal/addition‐
ally with health output: power
supply interrupted
FAULT DIAGNOSIS
t = 1
t = 2
Measures /
Measures
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions) /
Check the power supply,
check all electrical connec‐
tions (cables and plug connec‐
tions)
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
If the power supply is OK,
replace the sensor /
If the power supply is OK,
replace the sensor
Check the operating condi‐
tions: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensitiv‐
ity (potentiometer) / Check
sensing range and adjust if
necessary; see graphic F. /
With health output: Check the
power supply, check all electri‐
cal connections (cables and
plug connections). /
Check the operating condi‐
tions: Fully align the beam of
light (light spot) with the
object. / Clean the optical sur‐
faces . / Readjust the sensitiv‐
ity (potentiometer) / Check
sensing range and adjust if
necessary; see graphic F. /
With health output: Check the
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