20093868
62
GB
Operation, indication, diagnostics
8.1
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).
Tab. T
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.
8.2
Error code list with operation via internal LED
8
Operation, indication, diagnostics
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 1 x repeti-
tion
Air pressure switch has welded in the operating position
Start prevention, lockout after 30 seconds
Air pressure switch has welded in the noload 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 pres-
surestat or temperature or pressure switch on
Pressure switch-min: failure during operation
Shutdown and start prevention
Error code
Clear text
Possible cause
bAC Er3
Fault of compatibility program module to basic unit during
backup process
Program sequence of program module does not match the
basic unit
Err PrC
Fault of program module
–
Error in data content of program module
–
No program module fitted
Loc 2
No establishment of flame at the end of the safety time
–
Faulty or soiled fuel valves
–
Faulty or soiled flame detector
–
Poor adjustment of burner, no fuel
–
Faulty ignition equipment
Loc 3
Air pressure faulty (air pressure switch welded in no-load po-
sition), decrease to specified time (air pressure switch) re-
sponse time)
Air pressure switch faulty
–
Loss of air pressure signal after specified time
–
Air pressure switch is welded in no-load position
Loc 4
Extraneous light
Extraneous light when burner startup
Loc 5
Air pressure faulty, air pressure switch welded in working po-
sition
Time out air pressure switch
–
Air pressure switch is welded in working position
Loc 6
Fault of actuator
–
Actuator faulty or blocked
–
Faulty connection
–
Wrong adjustment
Loc 7
Loss of flame Too many losses of flame during operation
(limitation of repetitions)
–
Faulty or soiled fuel valves
–
Faulty or soiled flame detector
–
Poor adjustment of burner
Loc 8
---
Free
Loc 9
---
Free
