IRS31Pro-UMB
Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH
41
14 Fault Description
Fault Description
Cause - Remedy
Device does not allow polling or
does not respond
-
Check supply voltage
-
Check interface connection
-
Incorrect device ID
check ID; devices are
delivered with ID 1
Device delivers implausible values
-
Check for compliance with the sensor installation
instructions
Device transmits error value 24h
(36d)
A channel was requested that is not available on this
device
Device transmits error value 28h
(40d)
Device is in initialization phase after start-up
wait
until first measurement is complete
Device transmits error value 50h
(80d)
Device is being operated above the specified
measuring range
Device transmits error value 51h
(81d)
Device is being operated below the specified
measuring range
Device transmits error value 55h
(85d)
The device is unable to execute a valid
measurement due to the ambient conditions.
This may be due to the following reasons:
-
The road surface temperature is too high to
perform the freezing temperature measurement
-
The water film height is too low to perform the
freezing temperature measurement
-
The freezing temperature cannot be determined,
because of an firm layer of ice on the sensor
Device transmits error value 2Bh
(43d)
The device returns this error value in the channel
because there is a fault on one of the variables on
which this channel is based.
Device transmits error value 36h
(54d)
Coupling IRS31-ARS31 is active, and a freezing
temperature or saline concentration channel of the
IRS31Pro-UMB is queried.
Device transmits error value 54h
(84d)
Internal measurement error. Can be ignored for one-
time occurrence. In case of permanent occurrence,
check whether the installation notes / power supply
correspond to the specifications in the operating
instructions.
Device transmits an error value not
listed here
There may be several reasons for this behavior
contact the manufacturer’s technical support service
Device transmits error value 32h
(50d)
contact the manufacturer’s technical support service
Device transmits error value 33h
(51d)
contact the manufacturer’s technical support service
Device
transmits
no
freezing
temperature
-
The Sensor is too warm
-
The Sensor is dry
-
The sensor is covered with ice
