LW2720
Electronic level sensor
34
Diagnostic message
Possible cause
Recommended actions
No reflection signal
No valid level reading. Reasons may be
multiple:
• No valid level echo in the measuring
range.
• Wrong device configuration.
• Analyse echo peaks and check
device configuration, especially the
detection threshold.
• Check physical installation of device
(e.g. antenna contamination).
• Consider increasing the [Alert mode
delay time] parameter.
• Restore the default settings, restart
and reconfigure the device.
• If the condition persists, replace the
device.
Simulation active
The device is in simulation mode and is
not reporting actual process information.
• If this behaviour is not desired, stop
the simulation mode.
• If the condition persists, restart the
device.
Admissible device temperature exceed-
ed.
Electronics temperature out of limits
• Verify ambient temperature is within
the operating range.
• Remove heat source.
• Remove cause.
• Provide cooling.
Admissible device temperature not
reached.
The electronics temperature is below the
operating range.
• Verify ambient temperature is within
the operating range.
• Insulate device.
Primary supply overvoltage.
Supply voltage is too high.
• Verify operating voltage is between
18-30 V.
Primary supply undervoltage.
Supply voltage is too low.
• Verify operating voltage is between
18-30 V.
Maintenance required – Cleaning.
Product build-up on the antenna.
• Clean the antenna.
For further information, please refer to the IODD description (
parameter descriptions of the used parameter setting software.
