39/245
Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 6 Function 29.11.2011
6.4 Control sequence in the event of fault
If lockout occurs, the outputs for the fuel valves, the burner motor and the ignition
equipment are immediately deactivated (<1 second).
Cause Response
Mains voltage failure
Restart
Voltage below undervoltage threshold
Safety shutdown
Voltage above undervoltage threshold
Restart
Extraneous light before safety time Lockout
Extraneous light during waiting time Start prevention, lockout after approx.
30 seconds at the latest
No flame at the end of safety time Lockout end of safety time
Loss of flame during operation Factory setting:
Lockout
Can be parameterized:
(Depending on program module, e.g.
PME73.8...)
1 x repetition
Air pressure switch has welded in the
operating position
Start prevention, lockout after 30 seconds
Air pressure switch has welded in the no-
load position
Lockout at the end of the specified time
No air pressure signal on completion of the
specified time
Lockout, with breakdown time ≥0.3 seconds
POC contact is open during startup Lockout, approx. 5 seconds after
temperature thermostat or pressurestat or
temperature or pressure switch on
Pressure switch-min: Failure during
operation
Shutdown and start prevention
In the event of lockout, the LME7… remains locked and the red fault signal lamp lights
up. The burner control can immediately be reset. This state is also maintained in the
event of mains failure.
6.5 Resetting the burner control
When lockout occurs, the burner control can immediately be reset. To do this, press the
lockout reset button (info button) for about 1 second (<3 seconds). The LME7… can
only be reset when all contacts in the line are closed and when there is no
undervoltage.
To Next Page
Loading...
