Diagnostics and troubleshooting
Leuze electronic
DDLS 548i
58
Tab. 8.6:
ERL LED displays - Causes and measures
LED
Color
State
possible causes
Measures
ERL
Orange
Continuous
light
Link error on second device:
• Missing link on Ethernet cable
connection of the second device.
• SIGNAL QUALITY indicator on
second device without green and
orange LEDs.
Check Ethernet cable connection
on second device.
Check cause for the reduced SIG-
NAL QUALITY:
• Device alignment
• Clean optical window.
• Eliminate the possibility of en-
vironmental influences such as
snow, rain, fog.
• Laser diode: at end of life ex-
pectancy
Check LSR LED.
Red
Continuous
light
Link error on first device:
• Missing link on Ethernet cable
connection of the first device.
• SIGNAL QUALITY indicator on
first device without green and or-
ange LEDs.
Check Ethernet cable connection
on first device.
Check cause for the reduced SIG-
NAL QUALITY:
• Device alignment.
• Clean optical window.
• Eliminate the possibility of en-
vironmental influences such as
snow, rain, fog.
• Laser diode: at end of life ex-
pectancy
Check LSR LED.
Tab. 8.7:
LINK and LINK/ACT LED displays – Causes and measures
LED
Color
State
possible causes
Measures
LINK
LINK/
ACT
---
OFF
No cable-connected link to the con-
nected device.
Check Ethernet cable connection.