25
20011755
GB
Maintenance
9.4.2
Block types and intervention times if the burner fails
(*) only for applications provided for.
9.4.3
Resetting the control box
To reset the control box, proceed as follows:
Press and hold the reset button for between 1 and 2 sec-
onds. If the burner does not restart, you must make sure the
limit thermostat (
TL
) is closed.
If the control box reset button con tinues to blink signalling
the cause of the failure (RED LED), it is necessary to press
the button again for no more than two seconds.
9.4.4
Recycle function
The control box allows a recycle, i.e. complete repetition of the
start-up programme, making up to 3 attempts, in the event the
flame goes out during operation.
If the flame goes out again, this will cause the burner to lock out.
If there is a new demand for heat during the recycle, the 3 at-
tempts are reset when the limit thermostat (
TL
) switches.
9.4.5
Logging of burner operating parameters
With this control box, data - i.e. the number of blocks that have
occurred, the type of block that has occurred (just the last one)
and the oil valve opening operating time - can be logged even
when there is no power supply.
That way, you can determine how much fuel has been consumed
during operation.
To display these parameters, it is necessary to connect the soft-
ware diagnosis kit as d escribed in paragraph 4.8.1 “Diagnostic
software kit.
9.5
Supplementary, programmable control box
functions
9.5.1
Post-purging function (t6)
Post-purging is a function that keeps air purging on even after the
burner switches off.
The burner switches off wh en the li mit thermostat (
TL
) opens,
consequently cutting off the fuel supply to the valves.
To use this function the reset button must be pressed when the
limit thermostat is not switched over (
burner switched off
).
Post-purging time can be set to a maximum of
6 minutes
, pro-
ceeding as follows:
Press and hold the reset button for at least 5 seconds till the
LED indicator changes to red.
Set the desired time by pressing the button the appropriate
times:
once = post-purging for 1 minute
.
After 5 second s the control bo x automatically shows th e
minutes set by the re d LED blinking:
1 led pulse = post-
purging for 1 minute
.
To reset this
function, press and hold the button fo r at least 5
seconds at least, till the LED indicator changes to red then re-
lease it without carrying out any operation, then wait for 20 sec-
onds for the burner to start again.
If during post-purging there is a new request for heat, post-purg-
ing time is halted and a new burner operating cycle starts when
the limit thermostat (
TL
) switches.
If during post-purging there is an e xtraneous light the bu rner
blocks after thirty seconds.
The control box's factory settings are as follows:
0 minutes = no
post-purging
.
DESCRIPTION OF THE FAILURE TYPES
BLOCK
Oil heater failure: the start up thermostat (
K
) does not make the switch
After max. 6 minutes
Presence of extraneous light on the ignition or the turning off of the burner
After max. 30 seconds
Presence of extraneous light during the oil preheating:
After max. 30 seconds
Presence of extraneous light in pre-purging
Within 1 second
Extraneous light presence during the post-purging or continuous purging (*)
After max. 30 seconds
Disappearance of the flame during operation
After 3 recycles
The flame is not detected after the safety time
Immediate
