Riello RS5 Installation, Use And Maintenance Instructions page 32

FAULTS
The burner locks out
a f t e r t h e p r e p u r g e
phase due to flame -
failure.
The burner locks out
during the prepurge
phase.
The burner continues
to repeat the starting
cycle without going on
lock-out.
20020956
POSSIBLE CAUSES
The solenoid valves is passing too lit-
tle gas.
The solenoid valves are defective.
The ignition arc is irregular or has
failed.
The gas supply pipe and/or the valve
bloc has not been purged of air.
The air pressure switch does not
change over to the operational posi-
tion.
The flame exists.
The pressure test point (8, fig. 1,
page 1) is badly positioned.
The pressure in the gas supply is
close to the setting of the pressure
switch. When the valve opens the
pressure in the supply drops & the
gas pressure switch stops the burner
working. Once the burner valve clos-
es the pressure in the supply increase
& makes the pressure switch again,
and the cycle continues.
Check the supply pressure from the net-
work & adjust the gas multibloc valve
according to the instructions.
Replace the valve bloc.
Check the right insertion of the connec-
tors.
Check the right position of the electrode
according to the instructions of this man-
ual.
Purge the air in accordance with the gas
safety in use regulations.
The pressure switch is faulty, change it.
The developed air pressure is to low,
check the burner head setting.
Faulty valves: replace them.
Place it in the right position according
to the instructions of this manual.
Set the pressure switch according to the
manual.
15 GB
SOLUTION