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Operation, indications, diagnostic
9.1 Control sequence in the event of a fault
In the event of a lockout, the outlets for fuel valves, burner motor
and ignition devices should be immediately deactivated (<1 sec-
ond).
Tab. W
In the event of a lockout, the LME71… remains in lockout and the
red fault indicator lamp comes on. The burner control can be im-
mediately released. This state is maintained also when the mains
supply is interrupted.
9 Operation, indications, diagnostic
Causes Answer
Mains voltage interruption Restart
Voltage below the undervoltage threshold Safety switch off
Voltage above the undervoltage threshold Restart
Extraneous light before the safety time Lockout
Extraneous light during the standby time Starting pre-purging, lockout after about 30 seconds maximum
No flame at the end of the safety time 3 recirculation attempts, then shut-down
Flame loss during the operation Factory settings: lockout
Can be configured: (depending on the program module 1 x repe-
tition
Min pressure switch: fault during operation Switching of and on the pre-purging
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