Riello 40 Serie Instrucciones Para La Instalación, Uso Y Mantenimiento página 35

FAULTS
The burner does not
pass through the pre-
purge and locks out.
The burner continues to
repeat the starting cy-
cle without locking out.
TROUBLE DURING OPERATION
FAULTS
B u r n e r l o c k s o u t
during operation.
The burner stops.
3302
POSSIBLE CAUSES
The air pressure switch does not
switch
Flame is detected.
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
motor stops.
The pressure then increases, the
pressure switch closes and the start-
ing cycle is started again, and so on.
POSSIBLE CAUSES
Probe has ground fault.
Flame disappears four times.
Opening of the air pressure switch
Opening of the gas pressure switch
The pressure
Replace it.
The air pressure is too low (combustion
head incorrectly set).
Defective valves: replace them.
Reduce the pressure switch pressure
setting.
Check right position and, if necessary,
adjust as indicated herein.
Clean or replace ionisation probe.
C h e c k g a s m a i n s p r e ss u r e a n d / o r
adjust the solenoid valve, as indicated
in this manual.
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.
Check mains pressure and/or adjust
the solenoid valve as indicated in this
manual.
15 GB
SOLUTION
switch is defective;
SOLUTION