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7
Operation, indication, diagnostics
7.1
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 sec-
ond).
Cause
Mains voltage failure
Voltage below undervoltage threshold
Voltage above undervoltage threshold
Extraneous light before safety time
Extraneous light during waiting time
No flame at the end of safety time
Loss of flame during operation
Air pressure switch has welded in the operating position
Air pressure switch has welded in the noload position
No air pressure signal on completion of the specified time
POC contact is open during startup
Pressure switch-min: failure during operation
In the event of lockout, the LME71... 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.
7.2
Fault status messages, display of errors
7.2.1
Display of errors (faults) with lockout
Alternately
+
or
-
A
20051011
Operation, indication, diagnostics
Display shows alternately Loc and 4.
Unit is in the lockout position.
The current error code is displayed and the signal lamp is blinking red.
Example: error code 4
+
-
Press
or
for display of the phase, where the fault appeared.
Signal lamp blinks red.
Example: phase P02
Only with modulation via analog signal
A
Press
for display of the output position/actuator position where the error occurred.
Signal lamp lights up red.
Example: output position/actuator position 49.
Response
Restart
Safety shutdown
Restart
Lockout
Start prevention, lockout after approx. 30 seconds at the latest
Lockout end of safety time
Factory setting: lockout
Can be parameterized: (depending on program module 1 x repeti-
tion
Start prevention, lockout after 30 seconds
Lockout at the end of the specified time
Lockout, with breakdown time 0.3 seconds
Lockout, approx. 5 seconds after temperature thermostat or pres-
surestat or temperature or pressure switch on
Shutdown and start prevention
38
GB
Tab. U
Tab. V
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