Siemens ULTRAMAT 23, Manual, Page: 178 / 244

Error and system messages
11.2 Faults
ULTRAMAT 23
178
Manual, 3/2016, A5E37100388-003
is used up completely, the fault message "Measured value channel 3 beyond tolerance"
is displayed. A measurement is no longer possible.
● External maintenance requests
These are signaled via the binary inputs. The analyzer must be equipped with an add-on
board for this.
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.
Faults are logged and can be called in input mode using the menu
path "Analyzer status - Status - Logbook/faults" (see section Diag-
nostics: Diagnostics values (Page 107)). The corresponding mes-
sage 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.
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 Possible causes Remedy
Measured value channel 1 beyond
tolerance
Measured value display: *****
Analyzer unit of first component is faulty
Measured value channel 2 beyond
tolerance
Measured value display: *****
Analyzer unit of second component is
faulty
Measured value channel 3 beyond
tolerance
Measured value display: *****
Analyzer unit of third component is faulty
Measured value channel 3 (H
2
S
sensor) beyond tolerance
Measured value display: *****
Sensor faulty Replace the H
2
S sensor as described in
section Replacing the hydrogen sulfide
sensor (Page 172)
Measured value O
2
beyond tolerance
Measured value display: *****
Electrochemical O
2
sensor faulty or no
longer usable as result of aging
Replace the electrochemical O
2
sensor
as described in section Replacing the
electrochemical oxygen sensor
(Page 171).
Supply voltage beyond tolerance Supply voltage varies Correct such that the supply voltage
remains stable within the tolerance
values permissible for the analyzer.
Power supply unit on motherboard faulty
Temperature of analyzer beyond
tolerance
Ambient temperature too high or too low Provide sufficient ventilation or air condi-
tioning.