5903
10
BURNER START-UP CYCLE DIAGNOSTICS
During start-up, indication is according to the followin table:
OPERATING FAULT DIAGNOSTICS
The control box has a self-diagnostic system, which easily allows identifying the operating faults (
RED LED
signal).
ITo use this function, wait at least ten seconds from the safety lock out, and then press the reset button for a minimum of 3 sec-
onds.
After releasing the button, the RED LED starts flashing as shown in the diagram below.
The pulses of the LED constitute a signal spaced by approximately 3 seconds.
The number of pulses will provide the information on the possible faults, according to the table below:
.
COLOUR CODE TABLE
Sequences
Colour code
Pre-purging
Ignition phase
1
1
1
1
1
Operation, flame ok
v
v
v
v
v
v
v
v
v
v
v
v
Operating with weak flame signal
v
1
v
1
v
1
v
1
v
1
Electrical supply lower than ~ 170V
Lock-out
Extraneous light
v
v
v
v
v
Key:
1
Off
Yellow
v
Green
Red
SIGNAL
PROBABLE CAUSE
2 flashes
The flame does not stabilise at the end of the safety time:
– faulty photocell;
– faulty or soiled oil valves;
– neutral/phase exchange;
– faulty ignition transformer
– poor burner regulation (insufficient gas oil).
3 flashes
Min. air pressure switch (if installed) 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 (if installed) 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 oil);
– faulty or soiled oil valves;
– short circuit between photocell and earth.
8 flashes
– Not used.
10 flashes
– Wiring error or internal fault.
– Presence of electromagnetic disturbance. Use the radio disturbance protection kit.
RED LED on
wait at least 10 s
Press button
for > 3 s
Signal
Signal
Interval
3 s
