2748
9
GB
4.8
OPERATING FAULT DIAGNOSTICS
The control box has a self-diagnostic system, which easily allows identifying the operating faults (RED LED
signal).
To use this function, wait at least ten seconds from the safety lock out, and then press the reset button for a
minimum of 3 seconds.
After releasing the button, the RED LED starts flashing as shown in the diagram below.
The LED gives of a blink code every 3 seconds.
The blink codes give the information about the possible faults, as follows:
5.
WARNINGS TO AVOID BURNOUT OR BAD COMBUSTION OF THE
BURNER
1
– When the burner is stopped, the smoke pipe must be opened and effect a natural draught in the
combustion chamber. If the smoke pipe is closed, the burner must be drawn back till the extraction
of blast tube from the furnace. Before operating in this way take the voltage off.
2
– The place, where the burner works, must have same openings suitable for the passage of air
necessary for combustion. To be sure about this, you have to control CO2 and CO in the exhaust
gases with all the windows and doors closed.
3
– If in the place, where the burner works, there are air-breathings, check the existence of air-input
openings with dimensions suitable for the necessary air-exchange. In any case check that, when
the burner is stopped, the air-breathings do not draw warm smokes from pipes through the burner.
SIGNAL
PROBABLE CAUSE
2 flashes
==
The flame does not stabilise at the end of the safety time:
– faulty ionisation probe;
– faulty or soiled gas valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas).
3 flashes
===
Min. air pressure switch does not close:
– air pressure switch faulty;
– air pressure switch incorrectly regulated;
– max. air pressure switch triggered (if installed).
4 flashes
====
Min. air pressure switch does not open or light in the chamber before firing:
– air pressure switch faulty;
– air pressure switch incorrectly regulated.
7 flashes
=======
Loss of flame during operations:
– poor burner regulation (insufficient gas);
– faulty or soiled gas valves;
– short circuit between ionisation probe and earth.
10 flashes
=====
=====
– Wiring error or internal fault.
= = = = =
= = = = =
Press reset
for
>
3s
interval
Blink code
Blink code
RED LED on
wait at least
10s
3s
