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
A L
•
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
F S
•
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
F S
A L
R ed LE D on
L E D o n (w a itin g tim e > 1 0 s )
P re ss lo cko u t re se t
b u tto n
fo r > 3 s
B lin k co d e
~
O ff
A p p ro x.
3 s
B lin k co d e
~
F a u lt
