Siemens LMG25.330A27 - Fault Diagnosis and Operating States; Diagnosis of fault causes; Error code table

Landis & Staefa Division CC1N7421E December 04, 1998 13/16
• Burner control has initiated lockout
⇒ Red fault LED on
• Reset
Press lockout reset button for 0.5...3 s
AL
• Diagnosis of cause of fault
–
Wait > 10 s
–
Press lockout reset button for > 3 s
–
Read blink code of red fault LED
⇒ «Error code table»
• Burner control in operation
⇒ Green flame signal LED on
• Restart
Press lockout reset button for 0.5...3 s
FS
• Read flame establishment time
–
Press lockout reset button for > 3 s
–
Read blink code of green flame signal
LED
⇒ «Error code table»
After lockout, the red fault LED is steady on.
For reading the cause of fault, refer to the blink code given in the following table:
Error code table
Blink code Possible cause
2 x
••
•
No establishment of flame at the end of «TSA»
–
Faulty or soiled detector electrode
–
Faulty or soiled fuel valves
–
Poor adjustment of burner
3 x
•••
• Air pressure monitor does not close
–
«LP» faulty
–
«LP» incorrectly adjusted
–
Fan motor does not run
4 x
••••
• Air pressure monitor does not open or extraneous light on burner startup
–
«LP» faulty
–
«LP» incorrectly adjusted
5 x
•••••
• Extraneous light during pre-purging
–
Or internal device fault
7 x
•••••••
• Loss of flame during operation
–
Poor adjustment of burner
–
Faulty or soiled fuel valves
–
Short-circuit between detector electrode and ground
8...17 x
••••••••
...................
••••••••••
•••••••
• Free
18 x
••••••••••
••••••••
• Air pressure monitor opens during pre-purging or operation
–
«LP» incorrectly adjusted
–
Four times loss of flame during operation (LMG25)
19 x
••••••••••
•••••••••
• Faulty output contact
–
Wiring error
–
External power supply on output terminal
20 x
••••••••••
••••••••••
• Internal device fault
During the time the cause of the fault is diagnosed, the control outputs are deactivated.
–
The burner remains shut down
–
Exception: fault status signal «AL» at terminal 10
The burner is switched on only after a reset is made.
–
Press lockout reset button for 0.5...3 seconds
Operating concept
Diagnosis of cause of
fault
FS
AL
Red LED on
LED on (waiting time > 10 s)
Press lockout reset
button
for > 3 s
Blink code
~
Off
Approx.
3 s
Blink code
~
Fault