Riello 40 FS5D Instrucciones De Instalación, Uso Y Mantenimiento página 17

FAULTS
The burner locks out,
after the pre-purge pe-
riod, because the
flame does not ignite.
The burner does not
pass through the pre-
purge and locks out.
The burner continues
to repeat the starting
cycle without locking
out.
TROUBLE DURING OPERATION
FAULT
B u r n e r l o c k s o u t
during operation.
The burner stops.
3312
POSSIBLE CAUSES
The solenoid valves let too little gas
through.
The valves are faulty.
The electric ignition arc is irregular
or not present;
Air in the piping.
The air pressure switch does not
switch.
Flame is detected.
The gas pressure in the mains is
very near the value the gas pres-
sure switch is adjusted to. Conse-
quently, 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
starting 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.
Check mains pressure and/or adjust
the solenoid valve as indicated in this
manual.
Replace them.
Make sure connectors are inserted
properly.
Make sure the electrode is in the right po-
sition as indicated in the manual.
Completely bleed the gas feed line.
The pressure switch is defective; re-
place it.
The air pressure is too low (combus-
tion 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
SOLUTION