8021823/126P/2018-12-17 • © SICK AG • Subject to change without notice 101
Troubleshooting
12.2 Warning messages
Display Meaning / possible causes Troubleshooting
NoWrn No warnings –
wPlb Measured value not plausible.
Light path between measuring device and
reectorinterrupted.
Observelightspotonthereector.Thelight
spotmustnotmovefromthereector.If
required, re-align measuring device and re-
ectororusealargerreector.→ For align-
ment and mounting, see page 26, chapter 6.
Optical interferences • Remove optical interferences.
• Re-align distance measuring device and
reector.→ For alignment and mounting,
see page 26, chapter 6.
wLaser The measurement laser is still operational
but at the end of its service life.
Keep replacement device ready.
wLevel Current damping value is below the recom-
mended damping value. The recommended
damping value depends on the distance
betweenmeasuringdeviceandreector.
→ For recommended damping values, see
page 31, Table 6.
• Clean external lens surfaces like the
reectorandthelens
• Decrease the distance between the
measuringdeviceandthereector.
• Use a distance measuring device with
a higher range. → See page 109, chapter
14.10.
wTemp Internal device temperature is close to the
permissible range.
→ For the permissible ambient temperature,
see page 108, chapter 14.8.
• Check ambience temperature, improve
ventilation if applicable.
• Shield against radiation heat, e.g. share
the measuring device in case of direct
solar irradiation.
• Use device with heating at low ambient
temperatures.
• Use cooling housings for high ambient
temperatures.
Table 59: Warning messages
12.3 Error messages
Display Meaning / possible causes Troubleshooting
NoErr No error –
ePlb Measured value not plausible.
Light path between measuring device and
reectorinterrupted.
Observelightspotonthereector.Thelight
spotmustnotmovefromthereector.If
required, re-align measuring device and re-
ectororusealargerreector.→ For align-
ment and mounting, see page 26, chapter 6.
Optical interferences • Remove optical interferences.
• Re-align distance measuring device and
reector.→ For alignment and mounting,
see page 26, chapter 6.
eLaser The service life of a measurement laser is
exceeded.
Interchange measuring device.