Riello Start Aqua Condens 25/60 BIS, Installer And User Manual

Page: 33 / 76

ENGLISH
33
4.5 Display and fault codes
BOILER STATUS DISPLAY TYPE OF ALARM
Off status (OFF) OFF None
Stand-by - Signal
ACF alarm lockout module
A01
Definitive lockout
ACF electronics fault alarm
Limit thermostat alarm
A02
Definitive lockout
Tacho fan alarm
A03
Definitive lockout
Water pressure switch alarm
A04
Definitive lockout
NTC storage tank fault
A06
Signal
NTC outlet fault temperature
A07
stop
switch-off
Flue gases probe
Heating delivery Temporary
then final
Outlet/return line probe
differential alarm
Definitive lockout
NTC heating
return line fault
A08
stop
switch-off
Flue gases probe
HEATING RETURN LINE Temporary
then final
Outlet/return line probe
differential alarm
Definitive lockout
Cleaning the primary
heat exchanger
A09
Signal
NTC flue gases fault
Flue gases probe over-
temperature
Definitive lockout
Parasite flame
A11
stop
switch-off
Low temperature system
thermostat alarm
A77
stop
switch-off
Temporary, pending ignition
80°C
flashing
stop
switch-off
Water pressure switch
intervention
flashing
stop
switch-off
Calibration service
ADJ
Signal
Calibration installer
Chimney sweep
ACO
Signal
Vent cycle Signal
External probe presence Signal
Domestic water heat request
60°C
Signal
Heating heat request
80°C
Signal
Antifreeze heat request Signal
Flame present Signal
To restore operation (reset alarms):
Faults A01-02-03
Turn the mode selector to OFF, wait 5-6 seconds, then return the
selector to the required position.
If the reset attempts do not reactivate the boiler, request the interven-
tion 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
OFF and
adjust the filling tap until the pressure reaches a value between 1
and 1.5 bar. Then turn the function 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 do-
mestic hot water temperature, which remains set at around 50°C.
The intervention of the Technical Assistance Centre is required.
Fault A07-A08
Contact the Technical Assistance Centre.
Fault A09
Turn the mode selector to OFF, wait 5-6 seconds, then return the
selector to the required position.
If the reset attempts do not reactivate the boiler, request the interven-
tion of the Technical Assistance Centre.
Fault A09
The boiler is equipped with an auto-diagnostic system which, based
on the total number of hours in certain operating conditions, can sig-
nal the need to clean the primary exchanger (alarm code 09 and flue
gas probe meter >2,500).
Once the cleaning operation has been completed, reset to zero the
total hour meter with special kit supplied as an accessory following
procedure indicated below:
- Switch off the power supply
- Remove the housing
- Turn the instrument panel forward
- Remove the cover of the electrical parts by means of the fixing
hooks
- While the boiler is being fed electrically, press the CO button for at
least 4 seconds to verify the successful reset of the meter. Discon-
nect and connect again the power supply to the boiler the meter
value is displayed after the signal "- C -".
Live electrical parts (230 Vac).
NOTE
: the meter resetting procedure should be carried out after
each in-depth cleaning of the primary exchanger or if this latter is
replaced. To check the status of the totalled hours, multiply the value
read by 100 (e.g. value read 18 = total hours 1800 - value read 1=
total hours 100).
The boiler continues to operate normally with the active alarm.
Fault A77
The fault is self-resetting, if the boiler does not restart contact the
Technical Assistance Centre.
4.6 Temporary switch-off
In the event of temporary absences (weekends, short trips, etc.) set
the mode selector to
(OFF)
In this way (leaving the electricity and fuel supplies enabled),
the boiler is protected by the following systems:
-
Antifreeze
: when the boiler water temperature falls to 7°C, the cir-
culator is activated and, if necessary, also the burner (at the mini-
mum output) to bring the water temperature back within the safety
values (35°C). The
icon will flash on the display, indicating that
the anti-freeze function is active.
-
Circulator anti-locking
: an operation cycle is activated every 24 h.
4.7 Switching off for long periods
If the boiler is not used for a long time, the following operations must
be carried out:
- Set the mode selector to
off (OFF)
- Set the system's main switch to "off"
- Close the fuel and water taps of the heating and domestic hot wa-
ter system.
In this case, the anti-freeze and anti-blocking systems are de-
activated.
Drain the heating and domestic water system if there is any risk
of freezing.