Faults - Siemens ULTRAMAT 23 Series Equipment Manual

Error and system messages

11.2 Faults

• Message "UV LED current beyond tolerance"
• Message "External maintenance request"
These are signaled via the binary inputs. The analyzer must be equipped with an add-on
board for this.
• Message "Combined maintenance request"
Possible causes:
– External ELAN broadcast timeout
– External ELAN broadcast status ("Fault" or "Function check")
See also
Configuration: Special functions: Fact.data/Reset/Units:Various switches (Page 153)
11.2 Faults
Fault messages are references to certain changes in the analyzer which influence its ability to
measure correctly. In such cases remedial measures are required.
If the analyzer is in measuring mode, you can recognize the occurrence of a fault in that an "F"
appears at the right edge of the measurement screen.
Mains voltage
beyond tolerance
Press ENTER to clear
Next message with ->
The following table provides a summary of fault messages, their causes, and measures to
eliminate the faults.
If nothing is specified for a fault message in the 'Remedy' column, you must contact the servicing
department when this message occurs.
Message
Measured value channel 1, 2 or 3 be‐
yond tolerance,
Measured value display: *****
Measured value H2S beyond toler‐
ance,
Measured value display: *****
Measured value O2 beyond tolerance,
Measured value display: *****
180
Faults are logged and can be called in input mode using the menu
path "Analyzer status - Status - Logbook/faults" (see section Diagnos‐
tics: Diagnostics values (Page 105)). The corresponding message
texts are stored as alphanumeric text in the logbook. You can delete
the messages by pressing the <ENTER> key. However, they appear
again if the cause has not been eliminated.
Possible causes
Concentration of sample gas above the
measuring range
Corresponding IR or UV channel is faulty
Concentration of sample gas above the
measuring range
Sensor faulty
Concentration of sample gas above the
measuring range
Electrochemical O sensor faulty or no
2
longer usable as result of aging
Remedy
Reduce the sample gas concentration
Applies to IR and UV components
Reduce the sample gas concentration
Replace the H S sensor as described in
2
section Replacing the hydrogen sulfide
sensor (Page 174)
Reduce the sample gas concentration
Replace the electrochemical O
described in section Replacing the elec‐
trochemical oxygen sensor (Page 173).
Equipment Manual, 04/2022, A5E37100388-012
sensor as
2
ULTRAMAT 23