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The pump overrun may be varied (after the burner has been turned
off). To access this function, it is necessary to press the reset button
for over 5 seconds and then press it repeatedly until the character
“
AA
” appears on the left-hand display.
The following modes are available:
0011
1 minute of pump overrun
0033
3 minutes of pump overrun
0066
6 minutes of pump overrun
0099
9 minutes of pump overrun
1122
12 minutes of pump overrun
1155
15 minutes of pump overrun
CCOO
24 hours of pump overrun
It is also possible to set a continuous pump operation by closing the
contact of jumper 4 (see section 2.12.).
Safety shutdown: In the event that a safety shutdown occurs, it is
necessary to contact an Authorised Service Centre.
DISPLAY
AA0011
AA0022
AA0033
AA0077
AA1199
AA2200
AA2211
AA2222
AA3333
AA9999
CAUSE
Too many attempts to ignite on starting up
After three attempts at ignition, no increase in DT was
detected
The heating flow temperature exceeds 100°C during
operation
Too many failures to flame in one period during operation
The flame was detected after the gas valve had closed
The flame was detected before the gas valve opened
The flow switch does not close
The flow switch does not open
Problem with the fan
Problem with the electronic monitoring
NOTE: When there is no ignition, check that the gas cock is open.
18
275
3.7.4. PUMP OVERRUN
3.8. BOILER SAFETY SYSTEMS
3.7.6. R
EGULATION MENU TABLE
3.7.5. TEST MODE
Summary of the functions accessed when the RESET button is pushed for 5 seconds.
The boiler is protected from malfunctioning by means of internal
checks by the P.C.B., which brings the boiler to a stop if necessary.
In the event of the boiler being shut off in this manner, a code
appears on the display which refers to the type of shut-off and the
reason behind it.
There are two types of shut-off:
- SAFETY SHUTDOWN :these group of errors (characterised on
the display by the letter “
EE
”) this situation is automatically
removed as soon as the cause behind it is resolved.
As soon as the origin of the shutdown disappears, the boiler
starts up again and returns to its normal operation.
- SHUTDOWN: (characterised on the display by the letter “
AA
”), it is
not removed unless a manual intervention is made.
The boiler may return to operation only if reset by means of
pressing the button “H” (see illustration on page 18) located at
the centre of the display.
There follows a list of the shutdown modes and the respective codes
shown on the display.
Shutdown (“
AA
” type): if such a situation occurs, it is necessary to reset
the boiler using the appropriate key. If this shutdown occurs again, an
Authorised Service Centre should be contacted.
The P.C.B. allows the boiler to be forced to the maximum or minimum
power.
To make the boiler operate at maximum power (100%: 24kW), it is
necessary to turn the selector knob “A” (section 3.3.) and, using a
light pressure, bring it to the < > position. To return the boiler to its
normal function, turn the selector “A” to the summer or winter
position.
N
OTE: To force the boiler to its maximum output it is necessary to
completely rotate the potentiometer for maximum heating output
regulation (PR).