Viessmann VEK, Инструкция по эксплуатации

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19
Initial start−up, inspection and maintenance
Burner control unit
(cont.)
Burner control unitLMO14....
(cont.)
Cause Response
After mains power failure Restart
After falling below the undervoltage
level Restart
In case of premature, faulty flame
signal during the pre−purge timet1 Fault shutdown at the end of the
pre−purge timet1
in case of premature, faulty flame
signal during the oil pre−heat timetw Starting will be inhibited after a
maximum of 40s fault shutdown
If the burner does not light within the
safety timet2 Fault shutdown at the end of the
safety timet2
If the flame fails during operation Max. 3 re−starts, then fault shutdown
No heating or oil preheater enabling
within 10min Fault shutdown
Fault shutdown
After a fault shutdown, the burner
control unit remains locked out
(non−modifiable fault shutdown) and
the red lamp lights up.
This state is also maintained after
the mains power supply has failed.
Resetting the burner control unit
The system can be immediately reset
after a fault shutdown. Hold down the
reset button for approx.1s (<3s).
Ignition sequence
If the flame fails within the safety
time, the system re−ignites but no
longer than up to the end of the max.
safety time. This allows several
ignition attempts within the safety
period; see program sequence on
page17.
Repeat restriction
For flame failure during operation,
up to three re−ignition attempts can
be made. The fourth flame failure
during operation triggers a fault
shutdown. The count of these
repeats begins with every controlled
start−up (through temperature or
pressure regulators, thermostat or
pressure limiters or safety limiters).
5692589GB