SIGNAL
7 led pulses
8 led pulses
To reset the control box after visual diagnostics have been displayed, you must
WARNING
press the reset button.
6.
FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for some problems that could cause a failure
to start or a bad working of the burner.
A fault usually makes the lockout lamp light come on which is situated inside the reset button of the control box
(2, fig. 1, page 2).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the burn-
er functions correctly, the lockout can be attributed to a temporary fault. If however the lock out continues, the
cause must be determined and the remedies shown in the following table adopted.
6.1
BURNER START-UP DIFFICULTIES
FAULTS
The burner does not
start when the limit
thermostat closes.
T h e b u r n e r g o e s
into lockout mode
before or during the
pre-purging.
Burner runs normal-
ly in the prepurge
and
ignition
cycle
and locks out after 5
seconds ca.
3221
Loss of flame during operation:
– badly adjusted burner;
– oil valve defective or dirty;
– flame detector defective or dirty.
Check and control of the oil heater (if there is one):
– faulty control thermostat or heater.
POSSIBLE CAUSE
Lack of electrical supply.
Heater or enabling thermostats are
faulty.
The connections in the control box
are wrongly inserted.
The flame detector sees extraneous
light.
The flame detector is dirty.
The flame detector is faulty.
Flame moves away or fails.
PROBABLE CAUSE
Check presence of voltage in the
L1 - N clamps of the 7 pin plug.
Check the conditions of the fuses.
Check that safety thermostat is not
lock out.
Replace them.
Check and connect all the
plugs and sockets properly.
Eliminate the light.
Clear it.
Replace it.
Check pressure and output of the fuel.
Check air output.
Change nozzle.
Check the coil of solenoid valve.
17 GB
SOLUTION