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ENGLISH
OPERATING CYCLE
ARIA
TW Begins with the closure of the thermostatic
line or the PG. The PA must be in the rest
position. This is the waiting and self-test
time lasting for 2,5 seconds.
T10 Begins when the motor starts up and with
the pre-purge phase; it lasts for 5 seconds,
within which the PA air pressure switch
must give the go-ahead.
T1 Pre-purge time, which lasts for at least 30
seconds, ending when the transformer star-
ts up.
T3 Pre-ignition phase, it ends when the gas
valve opens, and it lasts for 2 seconds.
T2 Safety time, within which the flame signal
must reach the EC electrode; it lasts for 3
seconds.
Necessary input signals
Output signals
A Begin start up
B Flame present
B-C Operation
C Control stop
C-D Air gate closure + post-purge
TC-PG Thermostats/Gas pressure switch line
MB Burner motor
PA Air pressure switch
TR Ignition transformer
V Gas valve
EC Control electrode
LME EQUIPMENT
The release pushbutton on the equipment is the main component for accessing all the diagnostic functions (activation and
deactivation) as well as for releasing the control and checking device. The release pushbutton has a multicoloured led
which indicates the state of the control and checking device during operation and when the diagnostic function is in use.
EQUIPMENT STATE INDICATORS
Description
Condition Colour sequence
Standby, other intermediate states No light
Ignition stage Yellow, flashing
Correct operation Green
Incorrect operation, current level of
flame detector below permitted minimum Green, flashing
Drop in voltage Alternating yellow red
Burner lock out Red
Fault (see table) Red, flashing
Stray light before burner ignition Alternating green red
Rapid flashing for diagnostics Red, rapid flashing
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