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7.10 ADJUSTMENTS
The boiler has already been adjusted by the manufacturer
during production. If the adjustments need to be made again,
for example after extraordinary maintenance, replacement of
the gas valve, or conversion from methane gas to LPG, ob-
serve the following procedures.
The adjustment of the maximum and minimum output, and of
the maximum and minimum heating and of slow switch-on,
must be made strictly in the sequence indicated, and only by
quali
fi
ed personnel only:
- disconnect the boiler from the power supply
- turn the heating water temperature selector to its maximum
- loosen the
fi
xing screws (E) on the instrument panel
- lift then turn the instrument panel towards you
- loosen the
fi
xing screws on the cover (F) to access the ter-
minal board
- insert the jumpers JP1 and JP3
- power up the boiler
The display shows “ADJ” for approximately 4 seconds
Next change the following parameters:
1 - Domestic hot water/absolute maximum
2 - Minimum
3 - Heating maximum
4 - Soft light fan speed
as follows:
- turn the heating water temperature selector to set the re-
quired value
ALARM CODE
CAUSE
ALARM TYPE
ACTION
_St
AUTOSTOP
Final
Call Landlord
_CL
CALL FOR SERVICE
Temporary then
fi
nal
Call Landlord
A01
Ignition failure,
fl
ame not sensed,
internal fault
Final
Reset, check appliance operation
A02
Limit thermostat fault
Final
Reset, check appliance operation
A03
Fan tacho signal fault
Final
Reset check appliance operation, check
fan
A04
Insuf
fi
cient system water pressure
Final
Check/re
fi
ll system pressure, reset, check
appliance operation
A06
DHW thermistor fault
Temporary
Check DHW thermistor
A07
Primary (
fl
ow) thermistor fault
Temporary
Check primary thermistor, check wiring
Primary (
fl
ow) thermistor over temperature Temporary then
Final
Reset, check appliance operation
Temperature differential
Final
Reset, check appliance operation, check
thermistors
A08
Return thermistor fault
Temporary
Check return thermistor, check wiring
Return thermistor over temperature
Temporary then
Final
Reset, check appliance operation
Temperature differential inverted
Final
Reset, check pump, ensure there is suf-
fi
cient circulation around heating circuit/s
A09
Flue thermistor or
fl
ue thermistor
counter fault
Temporary
Check
fl
ue thermistor counter at power
on, check
fl
ue thermistor, check wiring
Flue thermistor over temperature
Final
Reset, check appliance operation
A11
False
fl
ame
Temporary
Check appliance power connection
A77
Low temperature thermostat fault
Temporary
Check low temperature thermostat
Adj
Calibration
Na
None
ACO
Service operation
Na
None
Purge cycle mode active
Na
None
P
Preheating function active
Na
None
P
blinking
Preheating function running
Na
None
Flame ON
Na
None
Hours Stand-by
Na
None
- -
OFF
Na
None
- press the CO button and then skip to the calibration of the
next parameter.
Live electrical parts (230 V AC).
The following icons light up on the monitor:
1.
during domestic hot water/absolute maximum cali-
bration
2.
during minimum calibration
3. during heating maximum calibration
4.
P
during soft light fan speed calibration
End the procedure by removing jumpers JP1 and JP3 to
store these set values in the memory.
THE function can be ended at any time without storing the
set values in the memory and retaining the original values
as follows:
- remove jumpers JP1 and JP3 before all 4 parameters have
been set
- set the function selector to
(OFF/RESET)
- cut the power supply
- waiting for 15 minutes after it is connected.
Calibration can be carried out without switch on the
boiler.