Display And Fault Codes; Maintenance - Riello Start Condens 25 KIS Installer And User Manual

7 - Display and fault codes

Boiler status Display
Off status(OFF) Off
Stand-by -
ACF alarm lockout module A01
ACF electronics fault alarm A01
Fumes exhaust - air intake
A01
obstruction alarm
Limit thermostat alarm
A02
Tacho fan alarm
A03
Water pressure switch
A04
alarm
NTC domestic water fault
A06
NTC heating outlet fault
A07
Heating outlet probe over-
A07
temperature
Outlet/return line probe
A07
differential alarm
NTC heating return line
A08
fault
Heating return line probe
A08
over-temperature
Outlet/return line probe
A08
differential alarm
Cleaning the primary heat
A09
exchanger
NTC flue gases fault
A09
Flue gases probe over-
A09
temperature
Parasite flame
A11
Low temperature system
A77
thermostat alarm
Temporary pending ignition 80°C flashing
Water pressure switch
intervention
Calibration service
ADJ
Calibration installer
ADJ
Chimney sweep
ACO
Vent cycle
Preheating active function
Preheating heat request
External probe presence
Domestic water heat
60°C
request
Heating heat request
80°C
Antifreeze heat request
Flame present
To restore operation (reset alarms):
Faults A01-02-03
Position the mode selector on
then turn it to the required position.
If the reset attempts do not reactivate the boiler, request the inter-
vention of the Technical Assistance Centre.
Fault A 04
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
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 Techni-
cal Assistance Centre.
Fault A 06
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 Service is required.
Type of alarm
None
Signal
Definitive lockout
Definitive lockout
Definitive lockout
Definitive lockout
Definitive lockout
Definitive lockout
Signal
Temporary stop
Temporary then
definitive
Definitive lockout
Temporary stop
Temporary then
definitive
Definitive lockout
Signal
Signal
Definitive lockout
Temporary stop
Temporary stop
Temporary stop
Temporary stop
flashing
Signal
Signal
Signal
Signal
Signal
Signal
flashing
Signal
Signal
Signal
Signal
Signal
(OFF), wait for 5-6 seconds and
OFF and adjust the
Fault A 07-A 08
Contact the Technical Assistance Centre.
Fault A 09
Position the mode selector on
then turn it to the required position.
If the reset attempts do not reactivate the boiler, request the inter-
vention of the Technical Assistance Centre.
Fault A 09
The boiler is equipped with an auto-diagnostic system which, based
on the total number of hours in certain operating conditions, can
signal 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 after unscrewing its fixing screw
• Undo the fixing screws of the cover to access the terminal board
While electrically supplying the boiler, press the C button for at least
4 seconds to verify the meter has been reset and then disconnect
and reconnect power to the boiler; the meter value is displayed after
the signal "- C -".
9 Live electrical parts.
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 A 77
The fault is self-resetting, if the boiler does not restart contact the
Technical Assistance Centre.

8 - Maintenance

Periodic maintenance is an "obligation" required by law and is es-
sential to the safety, efficiency and lifetime of the boiler.
It allows for the reduction of consumption, polluting emissions and
keeping the product reliable over time.
Before starting maintenance operations:
• Perform the analysis of the combustion products to check the boil-
er operation status then cut the electrical supply by turning off the
system's general switch
• Close the fuel and water taps of the heating and domestic hot
water system.
The appliance must be systematically controlled at regular intervals
to make sure it works correctly and efficiently and conforms to legis-
lative provisions in force.
The frequency of controls depends on the conditions of installation
and usage, it being anyhow necessary to have a complete check
carried out by authorized personnel from the Servicing Centre every
year.
• Check and compare the boiler's performance with the relative
specifications. Any cause of visible deterioration must be imme-
diately identified and eliminated.
• Closely inspect the boiler for signs of damages or deterioration,
particularly with the drainage and aspiration system and electrical
apparatus.
• Check and adjust – where necessary – all the burner's parameters.
• Check and adjust – where necessary – the system's pressure.
• Analyze combustion. Compare results with the product's specifi-
.
cation. Any loss in performance must be identified and corrected
by finding and eliminating the cause.
• Make sure the main heat exchanger is clean and free of any resi-
duals or obstruction; if necessary clean it.
• Check and clean – where necessary – the condensation tray to
make sure it works properly.
9 Always switch off the power to the appliance and close the gas
by the gas cock on the boiler before carrying out any mainte-
nance and cleaning jobs on the boiler.
9 After routine and extraordinary maintenance operations have
been carried out, fill the siphon, following the instructions in the
section "Control prior to commissioning".
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ENGLISH
(OFF), wait for 5-6 seconds and