22
BURNER FAULT INDICATIONS
Control program fault conditions and lock-out indication
Whenever a fault occurs, the sequence switch stops and with it the lock-out indicator.
The symbol above the reading mark of the indicator gives the type of fault:
No start One of the contacts has not closed The contact of the limit thermostat or any other switching
devices in the control loop of terminal 4 to terminal 5 are
opened.
Extraneous light Lock-out during or after completion of the control program
Examples:
– Flame not extinguished
– Leaking fuel valves
– Faulty flame supervision circuit
Interruption of startup sequence Terminals 6, 7 and 15 remain under voltage until fault has been corrected
Lock-out Defect in the flame supervision circuit, faulty flame signal,
extraneous light
Interruption of startup sequence Terminals 6, 7 and 15 remain under voltage until fault has
been corrected
Lock-out No flame signal is present on completion of the safety time
Lock-out Flame signal has been lost during operation
In the event of a burner lockout, more than two
consecutive burner reset operations could cause
damage to the installation. On the third lockout,
contact the Aftersales Service.
If further lockouts or burner faults occur, interven-
tions must only be made by qualified, authorised
personnel (as indicated in this manual, and in
compliance with the laws and regulations current-
ly in force).
1
WARNING
DANGER
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