85
8
System Operation
8.3.4
Recalling Fault History
NOTICE
The VMS stores the last 10 faults with the associated running time meter values
NOTICE
If it is assured that the VMS has been set on power since the last fault, the time of the fault
can be determined with the help of the current running time meter reading and the current
time.
8.3.5
What Happens if a Fault Occurs in the O
2
Controller?
Turn selector switch (1) to STATUS
the display shows the actual status
Channel 1 switch (4) up
the display shows the latest fault code and the
firing rate values from the moment when the fault
occurs
Press ENTER (3)
the display shows text and running time meter
reading
Channel 1 switch (4) up again
the display shows the last but one fault code and
the firing rate values from the moment when the
fault occurs
Press ENTER (3)
the display shows the fault code and the related
operating mode.
You can browse through the fault history by pressing the
channel 1 switch
In the event of a fault, the display shows a warning mes-
sage and the O
2
controller is deactivated.
The specified base value ’Without control’ or the one for
’Air shortage’ is set.
The display shows the running text ’O
2
trim at fault’.
The burner would not be shut down.
Turn selector switch to STATUS to call up the corre-
sponding error code.
The display shows a plain text message about the
cause of error after you pressed the ENTER key (3).
Summary of Contents for VMS Series
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Page 144: ...143 10 Appendix 10 16 O2 Setpoint Curves...
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