Boiler Protection Devices; Safety Shut-Off; Shutdown; Malfunction Warning - Ariston Clas 24 FF Installation And Servicing Instructions

Boiler protection devices

The boiler is protected from malfunctioning by means of internal
checks performed by the electronic microprocessor P.C.B., which
stops the boiler from operating 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 shut-off
This type of error is "non-volatile", which means that the boiler
starts up again automatically as soon as the problem which
caused the shut-off is removed; on the display and fl ash "Err" and
the error code (es: Err Err / 101 101).
In fact, as soon as the cause of the shut-off disappears, the boiler
starts up again and continues to operate normally.
Safety shut-off due to insuffi cient water pressure
If the water pressure inside the heating circuit
is insuffi cient, the boiler will perform a safety
shut-off . The display will fl ash "Err" and the
code for Insuffi cient circulation 103, 104, 105,
Err/107 107))
106 or 107 (Err
Check the water pressure on the pressure gauge and make sure
that is between 0.6 and1.5 bar when the system is cold. If the
pressure is just under the minimum refi ll the system by connecting
the silver fl exible hose supplied to the two isolating points
underneath the boiler, once the hose is connected, open up both
of the grey quarter turn handles, once the pressure reads 1.5 bar
on the display, close both handles and disconnect the hose .
If the pressure drops very frequently, there may be a water leak
at some point in the system. If this is the case please contact your
installer and ask them to check it.
In this case or if the re-balancing request is performed on a
frequent basis, switch the boiler off , bring the external electric
switch to the OFF position, shut off the gas valve and contact a
qualifi ed technician to check for any leaks of water.

Shutdown

This type of error is "non-volatile", which means that it is not
removed automatically. On the display fl ash "Err" and the error
code (es: Err Err / 501 501).To restore normal operation press the
button on the control panel.
The fi rst fi gure of the error code (e.g. 1 01) indicates within which
operational assembly the error occurred.
1 - Primary Circuit
2 - Domestic Hot Water Circuit
3 - Internal Electronic Part
4 - External Electronic Part
5 - Ignition and Detection
6 - Air inlet - fl ue gas outlet
7 - Multizone

Malfunction warning

This warning is shown by the display in the following format:
5 P3 = Flame cut-off
the fi rst fi gure indicating the operational assembly is followed by
a P (warning) and the code relating to the specifi c warning.
Important
If this shutdown occurs frequently, contact an authorised Technical
Service Centre for assistance. For safety reasons, the boiler will
permit a maximum of 5 resets in 15 minutes (5 presses of the
RESET button); at the 6th attempt within this 15-minute period
the boiler will shut down and may only be operated again after
the electricity supply has been disconnected. If the shutdown is
occasional or an isolated event, this is not a problem.
boiler protection devices
Table summarising error codes
Central Heating circuit
Display Description
1 01 Overheat
1 02 Pressure Sensor Error
1 03
1 04
1 05 Insuffi cient circulation
1 06
1 07
1 10 C.H. Flow temp. probe circuit open / short circuit
1 12 C.H. Return temp. probe circuit open / short circuit
1 14 External sensor circuit open / short circuit
1 P1
1 P2 Insuffi cient circulation indication
1 P3
D.H.W. circuit
2 01 D.H.W. temp. probe circuit open / short circuit
2 02 Circuito aperto o cortocircuito sonda
accumulo bassa
2 04 Circuito aperto o cortocircuito sonda
collettore solare
2 07 Sovratemperatura collettore solare
2 08 Intervento antigelo collettore solare
Internal P.C.B.'s
3 01 EEPROM error
3 02 Communication error
3 03 Main P.C.B. error
3 05 Main P.C.B. error
3 06 Main P.C.B. error
3 07 Main P.C.B. error
External P.C.B.'s
4 07 Room sensor circuit open short circuit
Ignition and Detection
5 01 No fl ame detected
5 02 Flame detected with gas valve closed
5 P4 3 fl ame cut-off s detected in one cycle
Air Inlet / Flue gas outlet
6 04 Insuffi cient fan speed
6 07 Air pressure switch closed permanently
6 P1 Delay in air pressure switch closing
6 P2 APS close-open
Multizone (optional)
7 01 Zone2 Send Probe Damaged
7 02 Zone2 Return Probe Damaged
7 03 Zone3 Send Probe Damaged
7 04 Zone3 Return Probe Damaged
7 05 Hydraucic Comp. Probe Damaged
7 06 Zone2 Overheat
7 07 Zone3 Overheat
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