Fault
Reason
Yellow LED off
No power or power too low
with uncovered
(green LED does not light up)
path
Emitter defective
Path of rays covered (e.g. win-
dow dirty)
Wrong installation
Wrong settings
Yellow LED on
Transceiver defective
with covered
Attenuation of the product too
path
low
Strong
Turbulent application,
fluctuation of
reflections and so on
signal strength
Endress+Hauser
Remedy
Check power supply
Replace emitter
Check path of rays and clean if
necessary
Check installation
10
È
Check settings
48
È
Replace transceiver
Adjust sensitivity
51
È
Increase signal damping
61
È
en - Troubleshooting
67