Riello Start Aqua Condens 25/60 BIS Manuel D'installation Et D'utilisation page 39

In this way (leaving the electricity and fuel supplies enabled), the
boiler is protected by the following systems:
- antifreeze: when the temperature of the water in the boiler drops
below 5°C the circulator starts and, if necessary, the burner at
minimum output to being the water temperature to safety values
(35°C). During the antifreeze cycle, the symbol
digital display.
- circulator anti-blocking: an operation cycle is activated every
24 h.
H - Switching off for lengthy periods
If the boiler is not used for a long period, carry out the following
operations:
- turn the mode selector to
- turn the main system switch to "OFF".
- close the fuel and water taps of the heating and domestic hot
water system
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In this case, the anti-freeze and anti-blocking systems are
deactivated. Drain the heating and domestic water system if
there is any risk of freezing.
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The Technical Assistance Centre is at your disposal if you
have any problems carrying out this procedure.
I - Display and fault codes
The operating status of the boiler is shown on the digital display,
below is a list of the types of displays.
BOILER STATUS
Off status (OFF)
Stand-by
ACF alarm lockout module
ACF electronics fault alarm
Limit thermostat alarm
Tacho fan alarm
Water pressure switch alarm
NTC domestic water fault
NTC heating outlet fault
Heating outlet probe
over-temperature
Outlet/return line probe
differential alarm
NTC heating return line fault
Heating return line probe
over-temperature
Outlet/return line probe
differential alarm
appears on the
OFF
TYPE OF
DISPLAY
ALARM
OFF None
- Signal
Definitive
A01
lockout
Definitive
A02
lockout
Definitive
A03
lockout
Definitive
A04
lockout
Signal
A06
Temporary
stop
Temporary
A07
then definitive
Definitive
lockout
Temporary
stop
Temporary
A08
then definitive
Definitive
lockout
BOILER STATUS
Cleaning the primary
heat exchanger
NTC flue gases fault
Flue gases probe over-
temperature
Parasite flame
Low temperature system
thermostat alarm
Temporary pending ignition
Water pressure switch
intervention
Calibration service
Calibration installer
Chimney sweep
Vent cycle
External probe presence
Domestic water heat request
Heating heat request
Antifreeze heat request
Flame present
J - Resetting the faults
To restore operation (reset alarms):
Faults A01-02-03
Turn the mode selector to
the selector to the required position.
If the reset attempts do not reactivate the boiler, request the
intervention of the Technical Assistance Centre.
Fault A04
In addition to the fault code, the digital display displays the symbol
.
Check the pressure value indicated by the water gauge:
if it is less than 0.3 bar, position the function selector on
and adjust the filling tap until the pressure reaches a value between
1 and 1.5 bar.
filling tap
Then turn the mode selector to the required position. The boiler
will carry out a venting cycle lasting about 2 minutes.
If pressure drops are frequent, request the intervention of the
Technical Assistance Centre.
Fault A06
The boiler functions normally but does not guarantee a constant
domestic hot water temperature, which remains set at around 50°C.
The intervention of the Technical Assistance Centre is required.
ENGLISH
TYPE OF
DISPLAY
ALARM
Signal
A09
Definitive
lockout
Temporary
A11
stop
Temporary
A77
stop
Temporary
80 flashing
°C
stop
Temporary
flashing
stop
Signal
ADJ
Signal
ACO
Signal
Signal
Signal
60
°C
Signal
80
°C
Signal
Signal
OFF, wait 5-6 seconds, then return
OFF
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