18
BURNER FAULTS
Control program under fault
conditions and lock-out
indication
In case of any disturbance, the sequence mechanism stops and with it the lock-out indicator. The symbol
above the reading mark of the indicator gives the type of disturbance:
No start
, e.g. because one contact is not closed. Lock-out during or after control program sequence
due to extraneous light (e.g. non-extinguished flames, leaking fuel valves, defects in the flame
supervision circuit, etc.)
Interruption of startup sequence
, because the OPEN signal has not been delivered to terminal 8
by limit switch “a”. Terminals 6, 7 and 14 remain under voltage until the fault has been corrected!
Lockout
, because there is no air pressure indication at the beginning of air pressure control.
Every air pressure failure after this moment in time leads to lock-out, too!
Lock-out
due to a fault in the flame supervision circuit.
Interruption of startup sequence
, because the position signal for the low-flame position has not
been delivered to terminal 8 by auxiliary switch “m”. Terminals 6, 7 and 14 remain under voltage
until the fault has been corrected!
Lock-out
, because no flame signal is present after completion of the (1st) safety time.
Lock-out
, because no flame signal has been received on completion of the 2nd safety time (flame
signal of the main flame with interrupted pilot burners).
Lock-out
, because the flame signal has been lost during burner operation.
If lock-out occurs at any other moment in time between the start and the pre-ignition which is not marked by
a symbol, this is usually caused by a premature, i.e. faulty flame signal, e.g. caused by a self-igniting UV
tube.
LFL 1.335
Series 01
P
1
2
