17
LMO 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
Fuel preheating “on”, waiting time 5s.max
Yellow
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 on page 8)
Red, flashing
Stray light before burner ignition
Alternating green red
Rapid flashing for diagnostics
Red, rapid flashing
Description of operating anomalies
Visual indication
Possible causes
2 flashes
<
<
No flame signal
-
Faulty fuel valves
-
Faulty flame detector
-
Incorrect burner setting, no fuel
-
No ignition
3 flashes
<
<
<
Not used
4 flashes
<
<
<
<
Stray light on ignition
5 flashes
<
<
<
<
<
Not used
6 flashes
<
<
<
<
<
<
Not used
7 flashes
<
<
<
<
<
<
<
No flame signal during operation
-
Faulty fuel valves
-
Faulty flame detector
-
Incorrect burner setting, no fuel
8 flashes
<
<
<
<
<
<
<
<
Anomalies in fuel preheating time
9 flashes
<
<
<
<
<
<
<
<
<
Not used
10 flashes
<
<
<
<
<
<
<
<
<
<
Incorrect electrical connection or damage to equipment
If the burner is locked out, there will be a steady red light on the lock out pushbutton.
By pressing the transparent pushbutton, the control and checking device will be released.
By pressing it for more than 3 seconds, the diagnosis stage will be activated (red light flashes
rapidly). The table below describes the causes of the lock out or fault in relation to the number of
flashes (always red).
The diagnosis function is interrupted by pressing the release button for at least 3 seconds.
DIAGNOSIS OF LMO EQUIPMENT FAULTS AND LOCK OUT