3313
14
GB
TROUBLE DURING OPERATION
The burner does not
pass through the pre-
purging and locks out.
The air pressure switch does not
switch.
The pressure switch is defective; replace
it.
The air pressure is too low (combustion
head incorrectly set).
Flame is detected.
Defective valves: replace them.
The burner continues to
repeat the starting cy-
cle without locking out.
The gas pressure in the mains is very
near the value the gas pressure
switch is adjusted to. Consequently,
the sudden falling off in pressure at
the opening of the valve causes the
pressure switch to open meaning the
valves immediately close and the mo-
tor stops.
The pressure then increases, the
pressure switch closes and the start-
ing cycle is started again, and so on.
Reduce the pressure switch pressure
setting.
FAULTS
POSSIBLE CAUSES
SOLUTION
B u r n e r l o c k s o u t
during operation.
Probe has ground fault.
Check right position and, if necessary,
adjust as indicated herein.
Clean or replace ionisation probe.
Flame disappears four times.
C h e ck g a s m a i n s p r e s s u r e a n d / o r
adjust the solenoid valve, as indicated
in this manual.
Opening of the air pressure switch.
The air pressure is too low (combustion
head incorrectly set).
T h e p r e s s u r e s w i t c h i s d e f e c t i v e :
replace.
The burner stops.
Opening of the gas pressure switch.
Check mains pressure and/or adjust
the solenoid valve as indicated in this
manual.
FAULTS
POSSIBLE CAUSES
SOLUTION
