Riello 40 Serie Instrucciones Para La Instalación, Uso Y Mantenimiento página 34

FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for a series of problems that could cause a
failure to start or the poor operation of the burner. A fault in the operation usually switches on the lockout
lamp, situated inside the reset button of the control box (7, fig. 1, page 1). When lock-out lamp lights the
burner will attempt to light only after pushing the reset button. After this if the burner functions correctly, the
lock-out can be attributed to a temporary fault. However, if lockout continues, you must determine the cause
of the problem and take the action illustrated in the tables below .
START-UP PROBLEMS
FAULTS
The burner does not
start when the limit
thermostat closes.
The burner runs normal-
ly in the pre-purge and
ignition cycle and locks
out after approx. 5s.
Burner starts with an ig-
nition delay.
The burner locks out,
after the pre-purge peri-
od, because the flame
does not ignite.
3302
POSSIBLE CAUSES
Lack of electrical supply.
Gas is not supplied.
The gas pressure switch does not
close the contact.
The connections in the control box
are wrongly inserted.
The air pressure switch has changed
over to the operational position.
The air damper opening motor is
faulty.
The phase-neutral connection is in-
verted.
The wiring to the earth is lacking or
ineffective.
Ionisation probe has a ground fault or
is not in contact with flame, or there is
a break in its wiring to control box, or
there is a ground fault due to its insula-
tion being defective.
Ignition electrode is wrongly
positioned.
Air output is too high.
Valve brake not open enough with in-
sufficient gas allowed through.
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.
Check for voltage at L1-N terminals in 7-
pin plug.
Check the conditions of the fuses.
Check that safety thermostat is not lock
out.
Check gate opening.
Make sure that valves have changed
over to open position and that there are
no short circuits.
Adjust it.
Check and connect completely all the
plugs.
Replace the pressure switch.
Check the connection or replace the motor.
Swap them over.
Make earth connection efficient.
Check right position and, if necessary,
adjust as indicated herein.
Restore electrical connection.
Replace faulty lead.
Adjust properly as indicated herein.
Set the air output according to the
instructions of this manual.
Set correctly.
Check mains pressure and/or adjust the
solenoid valve as indicated in this manual.
Replace them.
Make sure connectors are inserted
properly.
Make sure electrode is in the right posi-
tion as indicated herein.
Completely bleed the gas feed line.
14 GB
SOLUTION